1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2013 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* This module provides three functions: dbx_symfile_init,
20 which initializes to read a symbol file; dbx_new_init, which
21 discards existing cached information when all symbols are being
22 discarded; and dbx_symfile_read, which reads a symbol table
25 dbx_symfile_read only does the minimum work necessary for letting the
26 user "name" things symbolically; it does not read the entire symtab.
27 Instead, it reads the external and static symbols and puts them in partial
28 symbol tables. When more extensive information is requested of a
29 file, the corresponding partial symbol table is mutated into a full
30 fledged symbol table by going back and reading the symbols
31 for real. dbx_psymtab_to_symtab() is the function that does this */
34 #include "gdb_string.h"
36 #if defined(__CYGNUSCLIB__)
37 #include <sys/types.h>
41 #include "gdb_obstack.h"
44 #include "breakpoint.h"
46 #include "gdbcore.h" /* for bfd stuff */
47 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
48 #include "filenames.h"
51 #include "stabsread.h"
52 #include "gdb-stabs.h"
54 #include "complaints.h"
56 #include "cp-support.h"
59 #include "gdb_assert.h"
60 #include "gdb_string.h"
62 #include "aout/aout64.h"
63 #include "aout/stab_gnu.h" /* We always use GNU stabs, not
67 /* Key for dbx-associated data. */
69 const struct objfile_data
*dbx_objfile_data_key
;
71 /* We put a pointer to this structure in the read_symtab_private field
76 /* Offset within the file symbol table of first local symbol for this
81 /* Length (in bytes) of the section of the symbol table devoted to
82 this file's symbols (actually, the section bracketed may contain
83 more than just this file's symbols). If ldsymlen is 0, the only
84 reason for this thing's existence is the dependency list. Nothing
85 else will happen when it is read in. */
89 /* The size of each symbol in the symbol file (in external form). */
93 /* Further information needed to locate the symbols if they are in
98 int file_string_offset
;
101 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
102 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
103 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
104 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
105 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
106 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
107 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
110 /* The objfile we are currently reading. */
112 static struct objfile
*dbxread_objfile
;
114 /* Remember what we deduced to be the source language of this psymtab. */
116 static enum language psymtab_language
= language_unknown
;
118 /* The BFD for this file -- implicit parameter to next_symbol_text. */
120 static bfd
*symfile_bfd
;
122 /* The size of each symbol in the symbol file (in external form).
123 This is set by dbx_symfile_read when building psymtabs, and by
124 dbx_psymtab_to_symtab when building symtabs. */
126 static unsigned symbol_size
;
128 /* This is the offset of the symbol table in the executable file. */
130 static unsigned symbol_table_offset
;
132 /* This is the offset of the string table in the executable file. */
134 static unsigned string_table_offset
;
136 /* For elf+stab executables, the n_strx field is not a simple index
137 into the string table. Instead, each .o file has a base offset in
138 the string table, and the associated symbols contain offsets from
139 this base. The following two variables contain the base offset for
140 the current and next .o files. */
142 static unsigned int file_string_table_offset
;
143 static unsigned int next_file_string_table_offset
;
145 /* .o and NLM files contain unrelocated addresses which are based at
146 0. When non-zero, this flag disables some of the special cases for
147 Solaris elf+stab text addresses at location 0. */
149 static int symfile_relocatable
= 0;
151 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
152 relative to the function start address. */
154 static int block_address_function_relative
= 0;
156 /* The lowest text address we have yet encountered. This is needed
157 because in an a.out file, there is no header field which tells us
158 what address the program is actually going to be loaded at, so we
159 need to make guesses based on the symbols (which *are* relocated to
160 reflect the address it will be loaded at). */
162 static CORE_ADDR lowest_text_address
;
164 /* Non-zero if there is any line number info in the objfile. Prevents
165 end_psymtab from discarding an otherwise empty psymtab. */
167 static int has_line_numbers
;
169 /* Complaints about the symbols we have encountered. */
172 unknown_symtype_complaint (const char *arg1
)
174 complaint (&symfile_complaints
, _("unknown symbol type %s"), arg1
);
178 lbrac_mismatch_complaint (int arg1
)
180 complaint (&symfile_complaints
,
181 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1
);
185 repeated_header_complaint (const char *arg1
, int arg2
)
187 complaint (&symfile_complaints
,
188 _("\"repeated\" header file %s not "
189 "previously seen, at symtab pos %d"),
193 /* find_text_range --- find start and end of loadable code sections
195 The find_text_range function finds the shortest address range that
196 encloses all sections containing executable code, and stores it in
197 objfile's text_addr and text_size members.
199 dbx_symfile_read will use this to finish off the partial symbol
200 table, in some cases. */
203 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
210 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
211 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
213 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
214 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
218 if (sec_start
< start
)
233 error (_("Can't find any code sections in symbol file"));
235 DBX_TEXT_ADDR (objfile
) = start
;
236 DBX_TEXT_SIZE (objfile
) = end
- start
;
241 /* During initial symbol readin, we need to have a structure to keep
242 track of which psymtabs have which bincls in them. This structure
243 is used during readin to setup the list of dependencies within each
244 partial symbol table. */
246 struct header_file_location
248 char *name
; /* Name of header file */
249 int instance
; /* See above */
250 struct partial_symtab
*pst
; /* Partial symtab that has the
251 BINCL/EINCL defs for this file. */
254 /* The actual list and controling variables. */
255 static struct header_file_location
*bincl_list
, *next_bincl
;
256 static int bincls_allocated
;
258 /* Local function prototypes. */
260 extern void _initialize_dbxread (void);
262 static void read_ofile_symtab (struct objfile
*, struct partial_symtab
*);
264 static void dbx_psymtab_to_symtab (struct objfile
*, struct partial_symtab
*);
266 static void dbx_psymtab_to_symtab_1 (struct objfile
*, struct partial_symtab
*);
268 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
270 static void read_dbx_symtab (struct objfile
*);
272 static void free_bincl_list (struct objfile
*);
274 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
276 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
278 static void init_bincl_list (int, struct objfile
*);
280 static char *dbx_next_symbol_text (struct objfile
*);
282 static void fill_symbuf (bfd
*);
284 static void dbx_symfile_init (struct objfile
*);
286 static void dbx_new_init (struct objfile
*);
288 static void dbx_symfile_read (struct objfile
*, int);
290 static void dbx_symfile_finish (struct objfile
*);
292 static void record_minimal_symbol (char *, CORE_ADDR
, int, struct objfile
*);
294 static void add_new_header_file (char *, int);
296 static void add_old_header_file (char *, int);
298 static void add_this_object_header_file (int);
300 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
302 struct partial_symbol
**,
303 struct partial_symbol
**);
305 /* Free up old header file tables. */
308 free_header_files (void)
310 if (this_object_header_files
)
312 xfree (this_object_header_files
);
313 this_object_header_files
= NULL
;
315 n_allocated_this_object_header_files
= 0;
318 /* Allocate new header file tables. */
321 init_header_files (void)
323 n_allocated_this_object_header_files
= 10;
324 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
327 /* Add header file number I for this object file
328 at the next successive FILENUM. */
331 add_this_object_header_file (int i
)
333 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
335 n_allocated_this_object_header_files
*= 2;
336 this_object_header_files
337 = (int *) xrealloc ((char *) this_object_header_files
,
338 n_allocated_this_object_header_files
* sizeof (int));
341 this_object_header_files
[n_this_object_header_files
++] = i
;
344 /* Add to this file an "old" header file, one already seen in
345 a previous object file. NAME is the header file's name.
346 INSTANCE is its instance code, to select among multiple
347 symbol tables for the same header file. */
350 add_old_header_file (char *name
, int instance
)
352 struct header_file
*p
= HEADER_FILES (dbxread_objfile
);
355 for (i
= 0; i
< N_HEADER_FILES (dbxread_objfile
); i
++)
356 if (filename_cmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
358 add_this_object_header_file (i
);
361 repeated_header_complaint (name
, symnum
);
364 /* Add to this file a "new" header file: definitions for its types follow.
365 NAME is the header file's name.
366 Most often this happens only once for each distinct header file,
367 but not necessarily. If it happens more than once, INSTANCE has
368 a different value each time, and references to the header file
369 use INSTANCE values to select among them.
371 dbx output contains "begin" and "end" markers for each new header file,
372 but at this level we just need to know which files there have been;
373 so we record the file when its "begin" is seen and ignore the "end". */
376 add_new_header_file (char *name
, int instance
)
379 struct header_file
*hfile
;
381 /* Make sure there is room for one more header file. */
383 i
= N_ALLOCATED_HEADER_FILES (dbxread_objfile
);
385 if (N_HEADER_FILES (dbxread_objfile
) == i
)
389 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = 10;
390 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
391 xmalloc (10 * sizeof (struct header_file
));
396 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = i
;
397 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
398 xrealloc ((char *) HEADER_FILES (dbxread_objfile
),
399 (i
* sizeof (struct header_file
)));
403 /* Create an entry for this header file. */
405 i
= N_HEADER_FILES (dbxread_objfile
)++;
406 hfile
= HEADER_FILES (dbxread_objfile
) + i
;
407 hfile
->name
= xstrdup (name
);
408 hfile
->instance
= instance
;
411 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
412 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
414 add_this_object_header_file (i
);
418 static struct type
**
419 explicit_lookup_type (int real_filenum
, int index
)
421 struct header_file
*f
= &HEADER_FILES (dbxread_objfile
)[real_filenum
];
423 if (index
>= f
->length
)
426 f
->vector
= (struct type
**)
427 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
428 memset (&f
->vector
[f
->length
/ 2],
429 '\0', f
->length
* sizeof (struct type
*) / 2);
431 return &f
->vector
[index
];
436 record_minimal_symbol (char *name
, CORE_ADDR address
, int type
,
437 struct objfile
*objfile
)
439 enum minimal_symbol_type ms_type
;
441 asection
*bfd_section
;
447 section
= SECT_OFF_TEXT (objfile
);
448 bfd_section
= DBX_TEXT_SECTION (objfile
);
452 section
= SECT_OFF_DATA (objfile
);
453 bfd_section
= DBX_DATA_SECTION (objfile
);
457 section
= SECT_OFF_BSS (objfile
);
458 bfd_section
= DBX_BSS_SECTION (objfile
);
468 section
= SECT_OFF_DATA (objfile
);
469 bfd_section
= DBX_DATA_SECTION (objfile
);
472 /* I don't think this type actually exists; since a N_SETV is the result
473 of going over many .o files, it doesn't make sense to have one
475 ms_type
= mst_file_data
;
476 section
= SECT_OFF_DATA (objfile
);
477 bfd_section
= DBX_DATA_SECTION (objfile
);
484 ms_type
= mst_file_text
;
485 section
= SECT_OFF_TEXT (objfile
);
486 bfd_section
= DBX_TEXT_SECTION (objfile
);
489 ms_type
= mst_file_data
;
491 /* Check for __DYNAMIC, which is used by Sun shared libraries.
492 Record it as global even if it's local, not global, so
493 lookup_minimal_symbol can find it. We don't check symbol_leading_char
494 because for SunOS4 it always is '_'. */
495 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
498 /* Same with virtual function tables, both global and static. */
500 char *tempstring
= name
;
502 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
504 if (is_vtable_name (tempstring
))
507 section
= SECT_OFF_DATA (objfile
);
508 bfd_section
= DBX_DATA_SECTION (objfile
);
511 ms_type
= mst_file_bss
;
512 section
= SECT_OFF_BSS (objfile
);
513 bfd_section
= DBX_BSS_SECTION (objfile
);
516 ms_type
= mst_unknown
;
522 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
523 && address
< lowest_text_address
)
524 lowest_text_address
= address
;
526 prim_record_minimal_symbol_and_info
527 (name
, address
, ms_type
, section
, bfd_section
, objfile
);
530 /* Scan and build partial symbols for a symbol file.
531 We have been initialized by a call to dbx_symfile_init, which
532 put all the relevant info into a "struct dbx_symfile_info",
533 hung off the objfile structure. */
536 dbx_symfile_read (struct objfile
*objfile
, int symfile_flags
)
540 struct cleanup
*back_to
;
542 sym_bfd
= objfile
->obfd
;
544 /* .o and .nlm files are relocatables with text, data and bss segs based at
545 0. This flag disables special (Solaris stabs-in-elf only) fixups for
546 symbols with a value of 0. */
548 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
550 /* This is true for Solaris (and all other systems which put stabs
551 in sections, hopefully, since it would be silly to do things
552 differently from Solaris), and false for SunOS4 and other a.out
554 block_address_function_relative
=
555 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
556 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
557 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
558 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
559 || (0 == strncmp (bfd_get_target (sym_bfd
), "epoc-pe", 7))
560 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
562 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
564 perror_with_name (objfile
->name
);
566 /* Size the symbol table. */
567 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
568 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
570 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
571 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
573 free_pending_blocks ();
574 back_to
= make_cleanup (really_free_pendings
, 0);
576 init_minimal_symbol_collection ();
577 make_cleanup_discard_minimal_symbols ();
579 /* Read stabs data from executable file and define symbols. */
581 read_dbx_symtab (objfile
);
583 /* Add the dynamic symbols. */
585 read_dbx_dynamic_symtab (objfile
);
587 /* Install any minimal symbols that have been collected as the current
588 minimal symbols for this objfile. */
590 install_minimal_symbols (objfile
);
592 do_cleanups (back_to
);
595 /* Initialize anything that needs initializing when a completely new
596 symbol file is specified (not just adding some symbols from another
597 file, e.g. a shared library). */
600 dbx_new_init (struct objfile
*ignore
)
602 stabsread_new_init ();
603 buildsym_new_init ();
604 init_header_files ();
608 /* dbx_symfile_init ()
609 is the dbx-specific initialization routine for reading symbols.
610 It is passed a struct objfile which contains, among other things,
611 the BFD for the file whose symbols are being read, and a slot for a pointer
612 to "private data" which we fill with goodies.
614 We read the string table into malloc'd space and stash a pointer to it.
616 Since BFD doesn't know how to read debug symbols in a format-independent
617 way (and may never do so...), we have to do it ourselves. We will never
618 be called unless this is an a.out (or very similar) file.
619 FIXME, there should be a cleaner peephole into the BFD environment here. */
621 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
624 dbx_symfile_init (struct objfile
*objfile
)
627 bfd
*sym_bfd
= objfile
->obfd
;
628 char *name
= bfd_get_filename (sym_bfd
);
630 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
631 struct dbx_symfile_info
*dbx
;
633 /* Allocate struct to keep track of the symfile. */
634 dbx
= XCNEW (struct dbx_symfile_info
);
635 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
637 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
638 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
639 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
641 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
642 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
643 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
645 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
647 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
649 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
651 error (_("Can't find .text section in symbol file"));
652 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
653 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
655 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
656 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
657 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
659 /* Read the string table and stash it away in the objfile_obstack.
660 When we blow away the objfile the string table goes away as well.
661 Note that gdb used to use the results of attempting to malloc the
662 string table, based on the size it read, as a form of sanity check
663 for botched byte swapping, on the theory that a byte swapped string
664 table size would be so totally bogus that the malloc would fail. Now
665 that we put in on the objfile_obstack, we can't do this since gdb gets
666 a fatal error (out of virtual memory) if the size is bogus. We can
667 however at least check to see if the size is less than the size of
668 the size field itself, or larger than the size of the entire file.
669 Note that all valid string tables have a size greater than zero, since
670 the bytes used to hold the size are included in the count. */
672 if (STRING_TABLE_OFFSET
== 0)
674 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
675 will never be zero, even when there is no string table. This
676 would appear to be a bug in bfd. */
677 DBX_STRINGTAB_SIZE (objfile
) = 0;
678 DBX_STRINGTAB (objfile
) = NULL
;
682 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
684 perror_with_name (name
);
686 memset (size_temp
, 0, sizeof (size_temp
));
687 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
690 perror_with_name (name
);
694 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
695 EOF if there is no string table, and attempting to read the size
696 from EOF will read zero bytes. */
697 DBX_STRINGTAB_SIZE (objfile
) = 0;
698 DBX_STRINGTAB (objfile
) = NULL
;
702 /* Read some data that would appear to be the string table size.
703 If there really is a string table, then it is probably the right
704 size. Byteswap if necessary and validate the size. Note that
705 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
706 random data that happened to be at STRING_TABLE_OFFSET, because
707 bfd can't tell us there is no string table, the sanity checks may
708 or may not catch this. */
709 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
711 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
712 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
713 error (_("ridiculous string table size (%d bytes)."),
714 DBX_STRINGTAB_SIZE (objfile
));
716 DBX_STRINGTAB (objfile
) =
717 (char *) obstack_alloc (&objfile
->objfile_obstack
,
718 DBX_STRINGTAB_SIZE (objfile
));
719 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
721 /* Now read in the string table in one big gulp. */
723 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
725 perror_with_name (name
);
726 val
= bfd_bread (DBX_STRINGTAB (objfile
),
727 DBX_STRINGTAB_SIZE (objfile
),
729 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
730 perror_with_name (name
);
735 /* Perform any local cleanups required when we are done with a particular
736 objfile. I.E, we are in the process of discarding all symbol information
737 for an objfile, freeing up all memory held for it, and unlinking the
738 objfile struct from the global list of known objfiles. */
741 dbx_symfile_finish (struct objfile
*objfile
)
743 free_header_files ();
747 dbx_free_symfile_info (struct objfile
*objfile
, void *arg
)
749 struct dbx_symfile_info
*dbx
= arg
;
751 if (dbx
->header_files
!= NULL
)
753 int i
= dbx
->n_header_files
;
754 struct header_file
*hfiles
= dbx
->header_files
;
758 xfree (hfiles
[i
].name
);
759 xfree (hfiles
[i
].vector
);
769 /* Buffer for reading the symbol table entries. */
770 static struct external_nlist symbuf
[4096];
771 static int symbuf_idx
;
772 static int symbuf_end
;
774 /* Name of last function encountered. Used in Solaris to approximate
775 object file boundaries. */
776 static char *last_function_name
;
778 /* The address in memory of the string table of the object file we are
779 reading (which might not be the "main" object file, but might be a
780 shared library or some other dynamically loaded thing). This is
781 set by read_dbx_symtab when building psymtabs, and by
782 read_ofile_symtab when building symtabs, and is used only by
783 next_symbol_text. FIXME: If that is true, we don't need it when
784 building psymtabs, right? */
785 static char *stringtab_global
;
787 /* These variables are used to control fill_symbuf when the stabs
788 symbols are not contiguous (as may be the case when a COFF file is
789 linked using --split-by-reloc). */
790 static struct stab_section_list
*symbuf_sections
;
791 static unsigned int symbuf_left
;
792 static unsigned int symbuf_read
;
794 /* This variable stores a global stabs buffer, if we read stabs into
795 memory in one chunk in order to process relocations. */
796 static bfd_byte
*stabs_data
;
798 /* Refill the symbol table input buffer
799 and set the variables that control fetching entries from it.
800 Reports an error if no data available.
801 This function can read past the end of the symbol table
802 (into the string table) but this does no harm. */
805 fill_symbuf (bfd
*sym_bfd
)
812 nbytes
= sizeof (symbuf
);
813 if (nbytes
> symbuf_left
)
814 nbytes
= symbuf_left
;
815 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
817 else if (symbuf_sections
== NULL
)
819 count
= sizeof (symbuf
);
820 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
824 if (symbuf_left
<= 0)
826 file_ptr filepos
= symbuf_sections
->section
->filepos
;
828 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
829 perror_with_name (bfd_get_filename (sym_bfd
));
830 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
831 symbol_table_offset
= filepos
- symbuf_read
;
832 symbuf_sections
= symbuf_sections
->next
;
836 if (count
> sizeof (symbuf
))
837 count
= sizeof (symbuf
);
838 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
842 perror_with_name (bfd_get_filename (sym_bfd
));
843 else if (nbytes
== 0)
844 error (_("Premature end of file reading symbol table"));
845 symbuf_end
= nbytes
/ symbol_size
;
847 symbuf_left
-= nbytes
;
848 symbuf_read
+= nbytes
;
852 stabs_seek (int sym_offset
)
856 symbuf_read
+= sym_offset
;
857 symbuf_left
-= sym_offset
;
860 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
863 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
865 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
866 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
867 (intern).n_other = 0; \
868 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
869 if (bfd_get_sign_extend_vma (abfd)) \
870 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
872 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
875 /* Invariant: The symbol pointed to by symbuf_idx is the first one
876 that hasn't been swapped. Swap the symbol at the same time
877 that symbuf_idx is incremented. */
879 /* dbx allows the text of a symbol name to be continued into the
880 next symbol name! When such a continuation is encountered
881 (a \ at the end of the text of a name)
882 call this function to get the continuation. */
885 dbx_next_symbol_text (struct objfile
*objfile
)
887 struct internal_nlist nlist
;
889 if (symbuf_idx
== symbuf_end
)
890 fill_symbuf (symfile_bfd
);
893 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
894 OBJSTAT (objfile
, n_stabs
++);
898 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
901 /* Initialize the list of bincls to contain none and have some
905 init_bincl_list (int number
, struct objfile
*objfile
)
907 bincls_allocated
= number
;
908 next_bincl
= bincl_list
= (struct header_file_location
*)
909 xmalloc (bincls_allocated
* sizeof (struct header_file_location
));
912 /* Add a bincl to the list. */
915 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
917 if (next_bincl
>= bincl_list
+ bincls_allocated
)
919 int offset
= next_bincl
- bincl_list
;
921 bincls_allocated
*= 2;
922 bincl_list
= (struct header_file_location
*)
923 xrealloc ((char *) bincl_list
,
924 bincls_allocated
* sizeof (struct header_file_location
));
925 next_bincl
= bincl_list
+ offset
;
927 next_bincl
->pst
= pst
;
928 next_bincl
->instance
= instance
;
929 next_bincl
++->name
= name
;
932 /* Given a name, value pair, find the corresponding
933 bincl in the list. Return the partial symtab associated
934 with that header_file_location. */
936 static struct partial_symtab
*
937 find_corresponding_bincl_psymtab (char *name
, int instance
)
939 struct header_file_location
*bincl
;
941 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
942 if (bincl
->instance
== instance
943 && strcmp (name
, bincl
->name
) == 0)
946 repeated_header_complaint (name
, symnum
);
947 return (struct partial_symtab
*) 0;
950 /* Free the storage allocated for the bincl list. */
953 free_bincl_list (struct objfile
*objfile
)
956 bincls_allocated
= 0;
960 do_free_bincl_list_cleanup (void *objfile
)
962 free_bincl_list (objfile
);
965 static struct cleanup
*
966 make_cleanup_free_bincl_list (struct objfile
*objfile
)
968 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
971 /* Set namestring based on nlist. If the string table index is invalid,
972 give a fake name, and print a single error message per symbol file read,
973 rather than abort the symbol reading or flood the user with messages. */
976 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
980 if (nlist
->n_strx
+ file_string_table_offset
981 >= DBX_STRINGTAB_SIZE (objfile
)
982 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
984 complaint (&symfile_complaints
,
985 _("bad string table offset in symbol %d"),
987 namestring
= "<bad string table offset>";
990 namestring
= (nlist
->n_strx
+ file_string_table_offset
991 + DBX_STRINGTAB (objfile
));
995 /* Scan a SunOs dynamic symbol table for symbols of interest and
996 add them to the minimal symbol table. */
999 read_dbx_dynamic_symtab (struct objfile
*objfile
)
1001 bfd
*abfd
= objfile
->obfd
;
1002 struct cleanup
*back_to
;
1012 CORE_ADDR sym_value
;
1015 /* Check that the symbol file has dynamic symbols that we know about.
1016 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1017 on a sun4 host (and vice versa) and bfd is not configured
1018 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1019 so we ignore the dynamic symbols in this case. */
1020 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1021 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1022 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1025 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1026 if (dynsym_size
< 0)
1029 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1030 back_to
= make_cleanup (xfree
, dynsyms
);
1032 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1033 if (dynsym_count
< 0)
1035 do_cleanups (back_to
);
1039 /* Enter dynamic symbols into the minimal symbol table
1040 if this is a stripped executable. */
1041 if (bfd_get_symcount (abfd
) <= 0)
1044 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1046 asymbol
*sym
= *symptr
;
1050 sec
= bfd_get_section (sym
);
1052 /* BFD symbols are section relative. */
1053 sym_value
= sym
->value
+ sec
->vma
;
1055 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1057 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1058 SECT_OFF_TEXT (objfile
));
1061 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1063 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1064 SECT_OFF_DATA (objfile
));
1067 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1069 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1070 SECT_OFF_BSS (objfile
));
1076 if (sym
->flags
& BSF_GLOBAL
)
1079 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1084 /* Symbols from shared libraries have a dynamic relocation entry
1085 that points to the associated slot in the procedure linkage table.
1086 We make a mininal symbol table entry with type mst_solib_trampoline
1087 at the address in the procedure linkage table. */
1088 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1089 if (dynrel_size
< 0)
1091 do_cleanups (back_to
);
1095 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1096 make_cleanup (xfree
, dynrels
);
1098 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1099 if (dynrel_count
< 0)
1101 do_cleanups (back_to
);
1105 for (counter
= 0, relptr
= dynrels
;
1106 counter
< dynrel_count
;
1107 counter
++, relptr
++)
1109 arelent
*rel
= *relptr
;
1111 rel
->address
+ ANOFFSET (objfile
->section_offsets
,
1112 SECT_OFF_DATA (objfile
));
1114 switch (bfd_get_arch (abfd
))
1116 case bfd_arch_sparc
:
1117 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1121 /* `16' is the type BFD produces for a jump table relocation. */
1122 if (rel
->howto
->type
!= 16)
1125 /* Adjust address in the jump table to point to
1126 the start of the bsr instruction. */
1133 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1134 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1138 do_cleanups (back_to
);
1142 find_stab_function_addr (char *namestring
, const char *filename
,
1143 struct objfile
*objfile
)
1145 struct minimal_symbol
*msym
;
1149 p
= strchr (namestring
, ':');
1154 strncpy (p
, namestring
, n
);
1157 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1160 /* Sun Fortran appends an underscore to the minimal symbol name,
1161 try again with an appended underscore if the minimal symbol
1165 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1168 if (msym
== NULL
&& filename
!= NULL
)
1170 /* Try again without the filename. */
1172 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1174 if (msym
== NULL
&& filename
!= NULL
)
1176 /* And try again for Sun Fortran, but without the filename. */
1179 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1182 return msym
== NULL
? 0 : SYMBOL_VALUE_ADDRESS (msym
);
1186 function_outside_compilation_unit_complaint (const char *arg1
)
1188 complaint (&symfile_complaints
,
1189 _("function `%s' appears to be defined "
1190 "outside of all compilation units"),
1194 /* Setup partial_symtab's describing each source file for which
1195 debugging information is available. */
1198 read_dbx_symtab (struct objfile
*objfile
)
1200 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1201 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
1202 struct internal_nlist nlist
;
1203 CORE_ADDR text_addr
;
1210 int past_first_source_file
= 0;
1211 CORE_ADDR last_o_file_start
= 0;
1212 CORE_ADDR last_function_start
= 0;
1213 struct cleanup
*back_to
;
1215 int textlow_not_set
;
1216 int data_sect_index
;
1218 /* Current partial symtab. */
1219 struct partial_symtab
*pst
;
1221 /* List of current psymtab's include files. */
1222 const char **psymtab_include_list
;
1223 int includes_allocated
;
1226 /* Index within current psymtab dependency list. */
1227 struct partial_symtab
**dependency_list
;
1228 int dependencies_used
, dependencies_allocated
;
1230 text_addr
= DBX_TEXT_ADDR (objfile
);
1231 text_size
= DBX_TEXT_SIZE (objfile
);
1233 /* FIXME. We probably want to change stringtab_global rather than add this
1234 while processing every symbol entry. FIXME. */
1235 file_string_table_offset
= 0;
1236 next_file_string_table_offset
= 0;
1238 stringtab_global
= DBX_STRINGTAB (objfile
);
1240 pst
= (struct partial_symtab
*) 0;
1242 includes_allocated
= 30;
1244 psymtab_include_list
= (const char **) alloca (includes_allocated
*
1245 sizeof (const char *));
1247 dependencies_allocated
= 30;
1248 dependencies_used
= 0;
1250 (struct partial_symtab
**) alloca (dependencies_allocated
*
1251 sizeof (struct partial_symtab
*));
1253 /* Init bincl list */
1254 init_bincl_list (20, objfile
);
1255 back_to
= make_cleanup_free_bincl_list (objfile
);
1257 last_source_file
= NULL
;
1259 lowest_text_address
= (CORE_ADDR
) -1;
1261 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1262 abfd
= objfile
->obfd
;
1263 symbuf_end
= symbuf_idx
= 0;
1264 next_symbol_text_func
= dbx_next_symbol_text
;
1265 textlow_not_set
= 1;
1266 has_line_numbers
= 0;
1268 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1269 to global and static variables. The stab for a global or static
1270 variable doesn't give us any indication of which section it's in,
1271 so we can't tell immediately which offset in
1272 objfile->section_offsets we should apply to the variable's
1275 We could certainly find out which section contains the variable
1276 by looking up the variable's unrelocated address with
1277 find_pc_section, but that would be expensive; this is the
1278 function that constructs the partial symbol tables by examining
1279 every symbol in the entire executable, and it's
1280 performance-critical. So that expense would not be welcome. I'm
1281 not sure what to do about this at the moment.
1283 What we have done for years is to simply assume that the .data
1284 section's offset is appropriate for all global and static
1285 variables. Recently, this was expanded to fall back to the .bss
1286 section's offset if there is no .data section, and then to the
1287 .rodata section's offset. */
1288 data_sect_index
= objfile
->sect_index_data
;
1289 if (data_sect_index
== -1)
1290 data_sect_index
= SECT_OFF_BSS (objfile
);
1291 if (data_sect_index
== -1)
1292 data_sect_index
= SECT_OFF_RODATA (objfile
);
1294 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1295 for the file to have no .data, no .bss, and no .text at all, if
1296 it also has no global or static variables. If it does, we will
1297 get an internal error from an ANOFFSET macro below when we try to
1298 use data_sect_index. */
1300 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1302 /* Get the symbol for this run and pull out some info. */
1303 QUIT
; /* Allow this to be interruptable. */
1304 if (symbuf_idx
== symbuf_end
)
1306 bufp
= &symbuf
[symbuf_idx
++];
1309 * Special case to speed up readin.
1311 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1313 has_line_numbers
= 1;
1317 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1318 OBJSTAT (objfile
, n_stabs
++);
1320 /* Ok. There is a lot of code duplicated in the rest of this
1321 switch statement (for efficiency reasons). Since I don't
1322 like duplicating code, I will do my penance here, and
1323 describe the code which is duplicated:
1325 *) The assignment to namestring.
1326 *) The call to strchr.
1327 *) The addition of a partial symbol the two partial
1328 symbol lists. This last is a large section of code, so
1329 I've imbedded it in the following macro. */
1331 switch (nlist
.n_type
)
1334 * Standard, external, non-debugger, symbols
1337 case N_TEXT
| N_EXT
:
1338 case N_NBTEXT
| N_EXT
:
1339 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1340 SECT_OFF_TEXT (objfile
));
1343 case N_DATA
| N_EXT
:
1344 case N_NBDATA
| N_EXT
:
1345 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1346 SECT_OFF_DATA (objfile
));
1351 case N_NBBSS
| N_EXT
:
1352 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1353 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1354 SECT_OFF_BSS (objfile
));
1359 namestring
= set_namestring (objfile
, &nlist
);
1362 record_minimal_symbol (namestring
, nlist
.n_value
,
1363 nlist
.n_type
, objfile
); /* Always */
1366 /* Standard, local, non-debugger, symbols. */
1370 /* We need to be able to deal with both N_FN or N_TEXT,
1371 because we have no way of knowing whether the sys-supplied ld
1372 or GNU ld was used to make the executable. Sequents throw
1373 in another wrinkle -- they renumbered N_FN. */
1378 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1379 SECT_OFF_TEXT (objfile
));
1380 namestring
= set_namestring (objfile
, &nlist
);
1382 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1383 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1384 && namestring
[nsl
- 2] == '.'))
1386 if (past_first_source_file
&& pst
1387 /* The gould NP1 uses low values for .o and -l symbols
1388 which are not the address. */
1389 && nlist
.n_value
>= pst
->textlow
)
1391 end_psymtab (objfile
, pst
, psymtab_include_list
,
1392 includes_used
, symnum
* symbol_size
,
1393 nlist
.n_value
> pst
->texthigh
1394 ? nlist
.n_value
: pst
->texthigh
,
1395 dependency_list
, dependencies_used
,
1397 pst
= (struct partial_symtab
*) 0;
1399 dependencies_used
= 0;
1400 has_line_numbers
= 0;
1403 past_first_source_file
= 1;
1404 last_o_file_start
= nlist
.n_value
;
1411 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1412 SECT_OFF_DATA (objfile
));
1415 case N_UNDF
| N_EXT
:
1416 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1417 We used to rely on the target to tell us whether it knows
1418 where the symbol has been relocated to, but none of the
1419 target implementations actually provided that operation.
1420 So we just ignore the symbol, the same way we would do if
1421 we had a target-side symbol lookup which returned no match.
1423 All other symbols (with nlist.n_value == 0), are really
1424 undefined, and so we ignore them too. */
1428 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1430 /* Deal with relative offsets in the string table
1431 used in ELF+STAB under Solaris. If we want to use the
1432 n_strx field, which contains the name of the file,
1433 we must adjust file_string_table_offset *before* calling
1434 set_namestring(). */
1435 past_first_source_file
= 1;
1436 file_string_table_offset
= next_file_string_table_offset
;
1437 next_file_string_table_offset
=
1438 file_string_table_offset
+ nlist
.n_value
;
1439 if (next_file_string_table_offset
< file_string_table_offset
)
1440 error (_("string table offset backs up at %d"), symnum
);
1441 /* FIXME -- replace error() with complaint. */
1446 /* Lots of symbol types we can just ignore. */
1453 /* Keep going . . . */
1456 * Special symbol types for GNU
1459 case N_INDR
| N_EXT
:
1461 case N_SETA
| N_EXT
:
1463 case N_SETT
| N_EXT
:
1465 case N_SETD
| N_EXT
:
1467 case N_SETB
| N_EXT
:
1478 static int prev_so_symnum
= -10;
1479 static int first_so_symnum
;
1481 static char *dirname_nso
;
1482 int prev_textlow_not_set
;
1484 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1485 SECT_OFF_TEXT (objfile
));
1487 prev_textlow_not_set
= textlow_not_set
;
1489 /* A zero value is probably an indication for the SunPRO 3.0
1490 compiler. end_psymtab explicitly tests for zero, so
1491 don't relocate it. */
1493 if (nlist
.n_value
== 0
1494 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1496 textlow_not_set
= 1;
1500 textlow_not_set
= 0;
1502 past_first_source_file
= 1;
1504 if (prev_so_symnum
!= symnum
- 1)
1505 { /* Here if prev stab wasn't N_SO. */
1506 first_so_symnum
= symnum
;
1510 end_psymtab (objfile
, pst
, psymtab_include_list
,
1511 includes_used
, symnum
* symbol_size
,
1512 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1513 dependency_list
, dependencies_used
,
1514 prev_textlow_not_set
);
1515 pst
= (struct partial_symtab
*) 0;
1517 dependencies_used
= 0;
1518 has_line_numbers
= 0;
1522 prev_so_symnum
= symnum
;
1524 /* End the current partial symtab and start a new one. */
1526 namestring
= set_namestring (objfile
, &nlist
);
1528 /* Null name means end of .o file. Don't start a new one. */
1529 if (*namestring
== '\000')
1532 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1533 The first one is a directory name; the second the file name.
1534 If pst exists, is empty, and has a filename ending in '/',
1535 we assume the previous N_SO was a directory name. */
1537 p
= lbasename (namestring
);
1538 if (p
!= namestring
&& *p
== '\000')
1540 /* Save the directory name SOs locally, then save it into
1541 the psymtab when it's created below. */
1542 dirname_nso
= namestring
;
1546 /* Some other compilers (C++ ones in particular) emit useless
1547 SOs for non-existant .c files. We ignore all subsequent SOs
1548 that immediately follow the first. */
1552 pst
= start_psymtab (objfile
,
1554 first_so_symnum
* symbol_size
,
1555 objfile
->global_psymbols
.next
,
1556 objfile
->static_psymbols
.next
);
1557 pst
->dirname
= dirname_nso
;
1565 enum language tmp_language
;
1567 /* Add this bincl to the bincl_list for future EXCLs. No
1568 need to save the string; it'll be around until
1569 read_dbx_symtab function returns. */
1571 namestring
= set_namestring (objfile
, &nlist
);
1572 tmp_language
= deduce_language_from_filename (namestring
);
1574 /* Only change the psymtab's language if we've learned
1575 something useful (eg. tmp_language is not language_unknown).
1576 In addition, to match what start_subfile does, never change
1578 if (tmp_language
!= language_unknown
1579 && (tmp_language
!= language_c
1580 || psymtab_language
!= language_cplus
))
1581 psymtab_language
= tmp_language
;
1585 /* FIXME: we should not get here without a PST to work on.
1586 Attempt to recover. */
1587 complaint (&symfile_complaints
,
1588 _("N_BINCL %s not in entries for "
1589 "any file, at symtab pos %d"),
1590 namestring
, symnum
);
1593 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1595 /* Mark down an include file in the current psymtab. */
1597 goto record_include_file
;
1602 enum language tmp_language
;
1604 /* Mark down an include file in the current psymtab. */
1605 namestring
= set_namestring (objfile
, &nlist
);
1606 tmp_language
= deduce_language_from_filename (namestring
);
1608 /* Only change the psymtab's language if we've learned
1609 something useful (eg. tmp_language is not language_unknown).
1610 In addition, to match what start_subfile does, never change
1612 if (tmp_language
!= language_unknown
1613 && (tmp_language
!= language_c
1614 || psymtab_language
!= language_cplus
))
1615 psymtab_language
= tmp_language
;
1617 /* In C++, one may expect the same filename to come round many
1618 times, when code is coming alternately from the main file
1619 and from inline functions in other files. So I check to see
1620 if this is a file we've seen before -- either the main
1621 source file, or a previously included file.
1623 This seems to be a lot of time to be spending on N_SOL, but
1624 things like "break c-exp.y:435" need to work (I
1625 suppose the psymtab_include_list could be hashed or put
1626 in a binary tree, if profiling shows this is a major hog). */
1627 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
1632 for (i
= 0; i
< includes_used
; i
++)
1633 if (filename_cmp (namestring
, psymtab_include_list
[i
]) == 0)
1642 record_include_file
:
1644 psymtab_include_list
[includes_used
++] = namestring
;
1645 if (includes_used
>= includes_allocated
)
1647 const char **orig
= psymtab_include_list
;
1649 psymtab_include_list
= (const char **)
1650 alloca ((includes_allocated
*= 2) * sizeof (const char *));
1651 memcpy (psymtab_include_list
, orig
,
1652 includes_used
* sizeof (const char *));
1656 case N_LSYM
: /* Typedef or automatic variable. */
1657 case N_STSYM
: /* Data seg var -- static. */
1658 case N_LCSYM
: /* BSS " */
1659 case N_ROSYM
: /* Read-only data seg var -- static. */
1660 case N_NBSTS
: /* Gould nobase. */
1661 case N_NBLCS
: /* symbols. */
1663 case N_GSYM
: /* Global (extern) variable; can be
1664 data or bss (sigh FIXME). */
1666 /* Following may probably be ignored; I'll leave them here
1667 for now (until I do Pascal and Modula 2 extensions). */
1669 case N_PC
: /* I may or may not need this; I
1671 case N_M2C
: /* I suspect that I can ignore this here. */
1672 case N_SCOPE
: /* Same. */
1676 namestring
= set_namestring (objfile
, &nlist
);
1678 /* See if this is an end of function stab. */
1679 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1683 /* It's value is the size (in bytes) of the function for
1684 function relative stabs, or the address of the function's
1685 end for old style stabs. */
1686 valu
= nlist
.n_value
+ last_function_start
;
1687 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1688 pst
->texthigh
= valu
;
1692 p
= (char *) strchr (namestring
, ':');
1694 continue; /* Not a debugging symbol. */
1697 sym_name
= NULL
; /* pacify "gcc -Werror" */
1698 if (psymtab_language
== language_cplus
)
1700 char *new_name
, *name
= xmalloc (p
- namestring
+ 1);
1701 memcpy (name
, namestring
, p
- namestring
);
1703 name
[p
- namestring
] = '\0';
1704 new_name
= cp_canonicalize_string (name
);
1705 if (new_name
!= NULL
)
1707 sym_len
= strlen (new_name
);
1708 sym_name
= obsavestring (new_name
, sym_len
,
1709 &objfile
->objfile_obstack
);
1717 sym_name
= namestring
;
1718 sym_len
= p
- namestring
;
1721 /* Main processing section for debugging symbols which
1722 the initial read through the symbol tables needs to worry
1723 about. If we reach this point, the symbol which we are
1724 considering is definitely one we are interested in.
1725 p must also contain the (valid) index into the namestring
1726 which indicates the debugging type symbol. */
1731 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1734 if (gdbarch_static_transform_name_p (gdbarch
))
1735 gdbarch_static_transform_name (gdbarch
, namestring
);
1737 add_psymbol_to_list (sym_name
, sym_len
, 1,
1738 VAR_DOMAIN
, LOC_STATIC
,
1739 &objfile
->static_psymbols
,
1741 psymtab_language
, objfile
);
1745 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1747 /* The addresses in these entries are reported to be
1748 wrong. See the code that reads 'G's for symtabs. */
1749 add_psymbol_to_list (sym_name
, sym_len
, 1,
1750 VAR_DOMAIN
, LOC_STATIC
,
1751 &objfile
->global_psymbols
,
1753 psymtab_language
, objfile
);
1757 /* When a 'T' entry is defining an anonymous enum, it
1758 may have a name which is the empty string, or a
1759 single space. Since they're not really defining a
1760 symbol, those shouldn't go in the partial symbol
1761 table. We do pick up the elements of such enums at
1762 'check_enum:', below. */
1763 if (p
>= namestring
+ 2
1764 || (p
== namestring
+ 1
1765 && namestring
[0] != ' '))
1767 add_psymbol_to_list (sym_name
, sym_len
, 1,
1768 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1769 &objfile
->static_psymbols
,
1771 psymtab_language
, objfile
);
1774 /* Also a typedef with the same name. */
1775 add_psymbol_to_list (sym_name
, sym_len
, 1,
1776 VAR_DOMAIN
, LOC_TYPEDEF
,
1777 &objfile
->static_psymbols
,
1779 psymtab_language
, objfile
);
1786 if (p
!= namestring
) /* a name is there, not just :T... */
1788 add_psymbol_to_list (sym_name
, sym_len
, 1,
1789 VAR_DOMAIN
, LOC_TYPEDEF
,
1790 &objfile
->static_psymbols
,
1792 psymtab_language
, objfile
);
1795 /* If this is an enumerated type, we need to
1796 add all the enum constants to the partial symbol
1797 table. This does not cover enums without names, e.g.
1798 "enum {a, b} c;" in C, but fortunately those are
1799 rare. There is no way for GDB to find those from the
1800 enum type without spending too much time on it. Thus
1801 to solve this problem, the compiler needs to put out the
1802 enum in a nameless type. GCC2 does this. */
1804 /* We are looking for something of the form
1805 <name> ":" ("t" | "T") [<number> "="] "e"
1806 {<constant> ":" <value> ","} ";". */
1808 /* Skip over the colon and the 't' or 'T'. */
1810 /* This type may be given a number. Also, numbers can come
1811 in pairs like (0,26). Skip over it. */
1812 while ((*p
>= '0' && *p
<= '9')
1813 || *p
== '(' || *p
== ',' || *p
== ')'
1819 /* The aix4 compiler emits extra crud before the members. */
1822 /* Skip over the type (?). */
1826 /* Skip over the colon. */
1830 /* We have found an enumerated type. */
1831 /* According to comments in read_enum_type
1832 a comma could end it instead of a semicolon.
1833 I don't know where that happens.
1835 while (*p
&& *p
!= ';' && *p
!= ',')
1839 /* Check for and handle cretinous dbx symbol name
1841 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1842 p
= next_symbol_text (objfile
);
1844 /* Point to the character after the name
1845 of the enum constant. */
1846 for (q
= p
; *q
&& *q
!= ':'; q
++)
1848 /* Note that the value doesn't matter for
1849 enum constants in psymtabs, just in symtabs. */
1850 add_psymbol_to_list (p
, q
- p
, 1,
1851 VAR_DOMAIN
, LOC_CONST
,
1852 &objfile
->static_psymbols
, 0,
1853 0, psymtab_language
, objfile
);
1854 /* Point past the name. */
1856 /* Skip over the value. */
1857 while (*p
&& *p
!= ',')
1859 /* Advance past the comma. */
1867 /* Constant, e.g. from "const" in Pascal. */
1868 add_psymbol_to_list (sym_name
, sym_len
, 1,
1869 VAR_DOMAIN
, LOC_CONST
,
1870 &objfile
->static_psymbols
, nlist
.n_value
,
1871 0, psymtab_language
, objfile
);
1877 int name_len
= p
- namestring
;
1878 char *name
= xmalloc (name_len
+ 1);
1880 memcpy (name
, namestring
, name_len
);
1881 name
[name_len
] = '\0';
1882 function_outside_compilation_unit_complaint (name
);
1885 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1886 SECT_OFF_TEXT (objfile
));
1887 /* Kludges for ELF/STABS with Sun ACC. */
1888 last_function_name
= namestring
;
1889 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1890 value for the bottom of the text seg in those cases. */
1891 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1892 SECT_OFF_TEXT (objfile
))
1893 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1895 CORE_ADDR minsym_valu
=
1896 find_stab_function_addr (namestring
,
1897 pst
? pst
->filename
: NULL
,
1900 /* find_stab_function_addr will return 0 if the minimal
1901 symbol wasn't found. (Unfortunately, this might also
1902 be a valid address.) Anyway, if it *does* return 0,
1903 it is likely that the value was set correctly to begin
1905 if (minsym_valu
!= 0)
1906 nlist
.n_value
= minsym_valu
;
1908 if (pst
&& textlow_not_set
1909 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1911 pst
->textlow
= nlist
.n_value
;
1912 textlow_not_set
= 0;
1916 /* Keep track of the start of the last function so we
1917 can handle end of function symbols. */
1918 last_function_start
= nlist
.n_value
;
1920 /* In reordered executables this function may lie outside
1921 the bounds created by N_SO symbols. If that's the case
1922 use the address of this function as the low bound for
1923 the partial symbol table. */
1926 || (nlist
.n_value
< pst
->textlow
1928 != ANOFFSET (objfile
->section_offsets
,
1929 SECT_OFF_TEXT (objfile
))))))
1931 pst
->textlow
= nlist
.n_value
;
1932 textlow_not_set
= 0;
1934 add_psymbol_to_list (sym_name
, sym_len
, 1,
1935 VAR_DOMAIN
, LOC_BLOCK
,
1936 &objfile
->static_psymbols
,
1938 psymtab_language
, objfile
);
1941 /* Global functions were ignored here, but now they
1942 are put into the global psymtab like one would expect.
1943 They're also in the minimal symbol table. */
1947 int name_len
= p
- namestring
;
1948 char *name
= xmalloc (name_len
+ 1);
1950 memcpy (name
, namestring
, name_len
);
1951 name
[name_len
] = '\0';
1952 function_outside_compilation_unit_complaint (name
);
1955 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1956 SECT_OFF_TEXT (objfile
));
1957 /* Kludges for ELF/STABS with Sun ACC. */
1958 last_function_name
= namestring
;
1959 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1960 value for the bottom of the text seg in those cases. */
1961 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1962 SECT_OFF_TEXT (objfile
))
1963 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1965 CORE_ADDR minsym_valu
=
1966 find_stab_function_addr (namestring
,
1967 pst
? pst
->filename
: NULL
,
1970 /* find_stab_function_addr will return 0 if the minimal
1971 symbol wasn't found. (Unfortunately, this might also
1972 be a valid address.) Anyway, if it *does* return 0,
1973 it is likely that the value was set correctly to begin
1975 if (minsym_valu
!= 0)
1976 nlist
.n_value
= minsym_valu
;
1978 if (pst
&& textlow_not_set
1979 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1981 pst
->textlow
= nlist
.n_value
;
1982 textlow_not_set
= 0;
1986 /* Keep track of the start of the last function so we
1987 can handle end of function symbols. */
1988 last_function_start
= nlist
.n_value
;
1990 /* In reordered executables this function may lie outside
1991 the bounds created by N_SO symbols. If that's the case
1992 use the address of this function as the low bound for
1993 the partial symbol table. */
1996 || (nlist
.n_value
< pst
->textlow
1998 != ANOFFSET (objfile
->section_offsets
,
1999 SECT_OFF_TEXT (objfile
))))))
2001 pst
->textlow
= nlist
.n_value
;
2002 textlow_not_set
= 0;
2004 add_psymbol_to_list (sym_name
, sym_len
, 1,
2005 VAR_DOMAIN
, LOC_BLOCK
,
2006 &objfile
->global_psymbols
,
2008 psymtab_language
, objfile
);
2011 /* Two things show up here (hopefully); static symbols of
2012 local scope (static used inside braces) or extensions
2013 of structure symbols. We can ignore both. */
2027 case '#': /* For symbol identification (used in live ranges). */
2031 /* It is a C++ nested symbol. We don't need to record it
2032 (I don't think); if we try to look up foo::bar::baz,
2033 then symbols for the symtab containing foo should get
2034 read in, I think. */
2035 /* Someone says sun cc puts out symbols like
2036 /foo/baz/maclib::/usr/local/bin/maclib,
2037 which would get here with a symbol type of ':'. */
2041 /* Unexpected symbol descriptor. The second and subsequent stabs
2042 of a continued stab can show up here. The question is
2043 whether they ever can mimic a normal stab--it would be
2044 nice if not, since we certainly don't want to spend the
2045 time searching to the end of every string looking for
2048 complaint (&symfile_complaints
,
2049 _("unknown symbol descriptor `%c'"),
2052 /* Ignore it; perhaps it is an extension that we don't
2060 namestring
= set_namestring (objfile
, &nlist
);
2062 /* Find the corresponding bincl and mark that psymtab on the
2063 psymtab dependency list. */
2065 struct partial_symtab
*needed_pst
=
2066 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2068 /* If this include file was defined earlier in this file,
2070 if (needed_pst
== pst
)
2078 for (i
= 0; i
< dependencies_used
; i
++)
2079 if (dependency_list
[i
] == needed_pst
)
2085 /* If it's already in the list, skip the rest. */
2089 dependency_list
[dependencies_used
++] = needed_pst
;
2090 if (dependencies_used
>= dependencies_allocated
)
2092 struct partial_symtab
**orig
= dependency_list
;
2095 (struct partial_symtab
**)
2096 alloca ((dependencies_allocated
*= 2)
2097 * sizeof (struct partial_symtab
*));
2098 memcpy (dependency_list
, orig
,
2100 * sizeof (struct partial_symtab
*)));
2102 fprintf_unfiltered (gdb_stderr
,
2103 "Had to reallocate "
2104 "dependency list.\n");
2105 fprintf_unfiltered (gdb_stderr
,
2106 "New dependencies allocated: %d\n",
2107 dependencies_allocated
);
2115 /* Solaris 2 end of module, finish current partial symbol table.
2116 end_psymtab will set pst->texthigh to the proper value, which
2117 is necessary if a module compiled without debugging info
2118 follows this module. */
2119 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
2121 end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2122 symnum
* symbol_size
,
2123 (CORE_ADDR
) 0, dependency_list
,
2124 dependencies_used
, textlow_not_set
);
2125 pst
= (struct partial_symtab
*) 0;
2127 dependencies_used
= 0;
2128 has_line_numbers
= 0;
2134 HANDLE_RBRAC (nlist
.n_value
);
2140 case N_SSYM
: /* Claim: Structure or union element.
2141 Hopefully, I can ignore this. */
2142 case N_ENTRY
: /* Alternate entry point; can ignore. */
2143 case N_MAIN
: /* Can definitely ignore this. */
2144 case N_CATCH
: /* These are GNU C++ extensions */
2145 case N_EHDECL
: /* that can safely be ignored here. */
2155 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2156 case N_DEFD
: /* GNU Modula-2 */
2157 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2159 case N_OBJ
: /* Useless types from Solaris. */
2162 /* These symbols aren't interesting; don't worry about them. */
2166 /* If we haven't found it yet, ignore it. It's probably some
2167 new type we don't know about yet. */
2168 unknown_symtype_complaint (hex_string (nlist
.n_type
));
2173 /* If there's stuff to be cleaned up, clean it up. */
2176 /* Don't set pst->texthigh lower than it already is. */
2177 CORE_ADDR text_end
=
2178 (lowest_text_address
== (CORE_ADDR
) -1
2179 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
2180 SECT_OFF_TEXT (objfile
)))
2181 : lowest_text_address
)
2184 end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2185 symnum
* symbol_size
,
2186 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2187 dependency_list
, dependencies_used
, textlow_not_set
);
2190 do_cleanups (back_to
);
2193 /* Allocate and partially fill a partial symtab. It will be
2194 completely filled at the end of the symbol list.
2196 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2197 is the address relative to which its symbols are (incremental) or 0
2200 static struct partial_symtab
*
2201 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2202 int ldsymoff
, struct partial_symbol
**global_syms
,
2203 struct partial_symbol
**static_syms
)
2205 struct partial_symtab
*result
=
2206 start_psymtab_common (objfile
, objfile
->section_offsets
,
2207 filename
, textlow
, global_syms
, static_syms
);
2209 result
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2210 sizeof (struct symloc
));
2211 LDSYMOFF (result
) = ldsymoff
;
2212 result
->read_symtab
= dbx_psymtab_to_symtab
;
2213 SYMBOL_SIZE (result
) = symbol_size
;
2214 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2215 STRING_OFFSET (result
) = string_table_offset
;
2216 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2219 /* If we're handling an ELF file, drag some section-relocation info
2220 for this source file out of the ELF symbol table, to compensate for
2221 Sun brain death. This replaces the section_offsets in this psymtab,
2223 elfstab_offset_sections (objfile
, result
);
2226 /* Deduce the source language from the filename for this psymtab. */
2227 psymtab_language
= deduce_language_from_filename (filename
);
2232 /* Close off the current usage of PST.
2233 Returns PST or NULL if the partial symtab was empty and thrown away.
2235 FIXME: List variables and peculiarities of same. */
2237 struct partial_symtab
*
2238 end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2239 const char **include_list
, int num_includes
,
2240 int capping_symbol_offset
, CORE_ADDR capping_text
,
2241 struct partial_symtab
**dependency_list
, int number_dependencies
,
2242 int textlow_not_set
)
2245 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2247 if (capping_symbol_offset
!= -1)
2248 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2249 pst
->texthigh
= capping_text
;
2251 /* Under Solaris, the N_SO symbols always have a value of 0,
2252 instead of the usual address of the .o file. Therefore,
2253 we have to do some tricks to fill in texthigh and textlow.
2254 The first trick is: if we see a static
2255 or global function, and the textlow for the current pst
2256 is not set (ie: textlow_not_set), then we use that function's
2257 address for the textlow of the pst. */
2259 /* Now, to fill in texthigh, we remember the last function seen
2260 in the .o file. Also, there's a hack in
2261 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2262 to here via the misc_info field. Therefore, we can fill in
2263 a reliable texthigh by taking the address plus size of the
2264 last function in the file. */
2266 if (pst
->texthigh
== 0 && last_function_name
2267 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2271 struct minimal_symbol
*minsym
;
2273 p
= strchr (last_function_name
, ':');
2275 p
= last_function_name
;
2276 n
= p
- last_function_name
;
2278 strncpy (p
, last_function_name
, n
);
2281 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2284 /* Sun Fortran appends an underscore to the minimal symbol name,
2285 try again with an appended underscore if the minimal symbol
2289 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2293 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
2295 last_function_name
= NULL
;
2298 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2300 /* This test will be true if the last .o file is only data. */
2301 else if (textlow_not_set
)
2302 pst
->textlow
= pst
->texthigh
;
2305 struct partial_symtab
*p1
;
2307 /* If we know our own starting text address, then walk through all other
2308 psymtabs for this objfile, and if any didn't know their ending text
2309 address, set it to our starting address. Take care to not set our
2310 own ending address to our starting address, nor to set addresses on
2311 `dependency' files that have both textlow and texthigh zero. */
2313 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2315 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2317 p1
->texthigh
= pst
->textlow
;
2318 /* If this file has only data, then make textlow match
2320 if (p1
->textlow
== 0)
2321 p1
->textlow
= p1
->texthigh
;
2326 /* End of kludge for patching Solaris textlow and texthigh. */
2328 pst
->n_global_syms
=
2329 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
2330 + pst
->globals_offset
);
2331 pst
->n_static_syms
=
2332 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
2333 + pst
->statics_offset
);
2335 pst
->number_of_dependencies
= number_dependencies
;
2336 if (number_dependencies
)
2338 pst
->dependencies
= (struct partial_symtab
**)
2339 obstack_alloc (&objfile
->objfile_obstack
,
2340 number_dependencies
* sizeof (struct partial_symtab
*));
2341 memcpy (pst
->dependencies
, dependency_list
,
2342 number_dependencies
* sizeof (struct partial_symtab
*));
2345 pst
->dependencies
= 0;
2347 for (i
= 0; i
< num_includes
; i
++)
2349 struct partial_symtab
*subpst
=
2350 allocate_psymtab (include_list
[i
], objfile
);
2352 /* Copy the sesction_offsets array from the main psymtab. */
2353 subpst
->section_offsets
= pst
->section_offsets
;
2354 subpst
->read_symtab_private
=
2355 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
2359 subpst
->texthigh
= 0;
2361 /* We could save slight bits of space by only making one of these,
2362 shared by the entire set of include files. FIXME-someday. */
2363 subpst
->dependencies
= (struct partial_symtab
**)
2364 obstack_alloc (&objfile
->objfile_obstack
,
2365 sizeof (struct partial_symtab
*));
2366 subpst
->dependencies
[0] = pst
;
2367 subpst
->number_of_dependencies
= 1;
2369 subpst
->globals_offset
=
2370 subpst
->n_global_syms
=
2371 subpst
->statics_offset
=
2372 subpst
->n_static_syms
= 0;
2376 subpst
->read_symtab
= pst
->read_symtab
;
2379 sort_pst_symbols (objfile
, pst
);
2381 if (num_includes
== 0
2382 && number_dependencies
== 0
2383 && pst
->n_global_syms
== 0
2384 && pst
->n_static_syms
== 0
2385 && has_line_numbers
== 0)
2387 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2388 it is on the obstack, but we can forget to chain it on the list. */
2389 /* Empty psymtabs happen as a result of header files which don't have
2390 any symbols in them. There can be a lot of them. But this check
2391 is wrong, in that a psymtab with N_SLINE entries but nothing else
2392 is not empty, but we don't realize that. Fixing that without slowing
2393 things down might be tricky. */
2395 discard_psymtab (objfile
, pst
);
2397 /* Indicate that psymtab was thrown away. */
2398 pst
= (struct partial_symtab
*) NULL
;
2404 dbx_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
2406 struct cleanup
*old_chain
;
2411 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2412 "Shouldn't happen.\n",
2417 /* Read in all partial symtabs on which this one is dependent. */
2418 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2419 if (!pst
->dependencies
[i
]->readin
)
2421 /* Inform about additional files that need to be read in. */
2424 fputs_filtered (" ", gdb_stdout
);
2426 fputs_filtered ("and ", gdb_stdout
);
2428 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2429 wrap_here (""); /* Flush output. */
2430 gdb_flush (gdb_stdout
);
2432 dbx_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
2435 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2437 /* Init stuff necessary for reading in symbols */
2440 old_chain
= make_cleanup (really_free_pendings
, 0);
2441 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2442 symbol_size
= SYMBOL_SIZE (pst
);
2444 /* Read in this file's symbols. */
2445 bfd_seek (objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2446 read_ofile_symtab (objfile
, pst
);
2448 do_cleanups (old_chain
);
2454 /* Read in all of the symbols for a given psymtab for real.
2455 Be verbose about it if the user wants that. PST is not NULL. */
2458 dbx_psymtab_to_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
2461 struct cleanup
*back_to
= NULL
;
2465 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2466 "Shouldn't happen.\n",
2471 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
2473 /* Print the message now, before reading the string table,
2474 to avoid disconcerting pauses. */
2477 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2478 gdb_flush (gdb_stdout
);
2481 sym_bfd
= objfile
->obfd
;
2483 next_symbol_text_func
= dbx_next_symbol_text
;
2485 if (DBX_STAB_SECTION (objfile
))
2488 = symfile_relocate_debug_section (objfile
,
2489 DBX_STAB_SECTION (objfile
),
2493 back_to
= make_cleanup (free_current_contents
,
2494 (void *) &stabs_data
);
2497 dbx_psymtab_to_symtab_1 (objfile
, pst
);
2500 do_cleanups (back_to
);
2502 /* Match with global symbols. This only needs to be done once,
2503 after all of the symtabs and dependencies have been read in. */
2504 scan_file_globals (objfile
);
2506 /* Finish up the debug error message. */
2508 printf_filtered ("done.\n");
2512 /* Read in a defined section of a specific object file's symbols. */
2515 read_ofile_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
2518 struct external_nlist
*bufp
;
2519 struct internal_nlist nlist
;
2521 unsigned max_symnum
;
2523 int sym_offset
; /* Offset to start of symbols to read */
2524 int sym_size
; /* Size of symbols to read */
2525 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2526 int text_size
; /* Size of text segment for symbols */
2527 struct section_offsets
*section_offsets
;
2529 sym_offset
= LDSYMOFF (pst
);
2530 sym_size
= LDSYMLEN (pst
);
2531 text_offset
= pst
->textlow
;
2532 text_size
= pst
->texthigh
- pst
->textlow
;
2533 /* This cannot be simply objfile->section_offsets because of
2534 elfstab_offset_sections() which initializes the psymtab section
2535 offsets information in a special way, and that is different from
2536 objfile->section_offsets. */
2537 section_offsets
= pst
->section_offsets
;
2539 dbxread_objfile
= objfile
;
2540 subfile_stack
= NULL
;
2542 stringtab_global
= DBX_STRINGTAB (objfile
);
2543 last_source_file
= NULL
;
2545 abfd
= objfile
->obfd
;
2546 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2547 symbuf_end
= symbuf_idx
= 0;
2549 symbuf_left
= sym_offset
+ sym_size
;
2551 /* It is necessary to actually read one symbol *before* the start
2552 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2553 occurs before the N_SO symbol.
2555 Detecting this in read_dbx_symtab
2556 would slow down initial readin, so we look for it here instead. */
2557 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2559 stabs_seek (sym_offset
- symbol_size
);
2561 bufp
= &symbuf
[symbuf_idx
++];
2562 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2563 OBJSTAT (objfile
, n_stabs
++);
2565 namestring
= set_namestring (objfile
, &nlist
);
2567 processing_gcc_compilation
= 0;
2568 if (nlist
.n_type
== N_TEXT
)
2570 const char *tempstring
= namestring
;
2572 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2573 processing_gcc_compilation
= 1;
2574 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2575 processing_gcc_compilation
= 2;
2576 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2578 if (strncmp (tempstring
, "__gnu_compiled", 14) == 0)
2579 processing_gcc_compilation
= 2;
2582 /* Try to select a C++ demangling based on the compilation unit
2586 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2587 know whether it will use the old style or v3 mangling. */
2588 if (processing_gcc_compilation
)
2590 if (AUTO_DEMANGLING
)
2592 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2599 /* The N_SO starting this symtab is the first symbol, so we
2600 better not check the symbol before it. I'm not this can
2601 happen, but it doesn't hurt to check for it. */
2602 stabs_seek (sym_offset
);
2603 processing_gcc_compilation
= 0;
2606 if (symbuf_idx
== symbuf_end
)
2608 bufp
= &symbuf
[symbuf_idx
];
2609 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2610 error (_("First symbol in segment of executable not a source symbol"));
2612 max_symnum
= sym_size
/ symbol_size
;
2615 symnum
< max_symnum
;
2618 QUIT
; /* Allow this to be interruptable. */
2619 if (symbuf_idx
== symbuf_end
)
2621 bufp
= &symbuf
[symbuf_idx
++];
2622 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2623 OBJSTAT (objfile
, n_stabs
++);
2625 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2627 namestring
= set_namestring (objfile
, &nlist
);
2631 if (sizeof (nlist
.n_value
) > 4
2632 /* We are a 64-bit debugger debugging a 32-bit program. */
2633 && (type
== N_LSYM
|| type
== N_PSYM
))
2634 /* We have to be careful with the n_value in the case of N_LSYM
2635 and N_PSYM entries, because they are signed offsets from frame
2636 pointer, but we actually read them as unsigned 32-bit values.
2637 This is not a problem for 32-bit debuggers, for which negative
2638 values end up being interpreted correctly (as negative
2639 offsets) due to integer overflow.
2640 But we need to sign-extend the value for 64-bit debuggers,
2641 or we'll end up interpreting negative values as very large
2642 positive offsets. */
2643 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2644 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2645 namestring
, section_offsets
, objfile
);
2647 /* We skip checking for a new .o or -l file; that should never
2648 happen in this routine. */
2649 else if (type
== N_TEXT
)
2651 /* I don't think this code will ever be executed, because
2652 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2653 the N_SO symbol which starts this source file.
2654 However, there is no reason not to accept
2655 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2657 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2658 processing_gcc_compilation
= 1;
2659 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2660 processing_gcc_compilation
= 2;
2663 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2664 know whether it will use the old style or v3 mangling. */
2665 if (AUTO_DEMANGLING
)
2667 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2671 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2672 || type
== (unsigned char) N_NBTEXT
)
2674 /* Global symbol: see if we came across a dbx defintion for
2675 a corresponding symbol. If so, store the value. Remove
2676 syms from the chain when their values are stored, but
2677 search the whole chain, as there may be several syms from
2678 different files with the same name. */
2679 /* This is probably not true. Since the files will be read
2680 in one at a time, each reference to a global symbol will
2681 be satisfied in each file as it appears. So we skip this
2687 /* In a Solaris elf file, this variable, which comes from the
2688 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2689 which comes from pst->textlow is correct. */
2690 if (last_source_start_addr
== 0)
2691 last_source_start_addr
= text_offset
;
2693 /* In reordered executables last_source_start_addr may not be the
2694 lower bound for this symtab, instead use text_offset which comes
2695 from pst->textlow which is correct. */
2696 if (last_source_start_addr
> text_offset
)
2697 last_source_start_addr
= text_offset
;
2699 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
,
2700 SECT_OFF_TEXT (objfile
));
2704 dbxread_objfile
= NULL
;
2708 /* This handles a single symbol from the symbol-file, building symbols
2709 into a GDB symtab. It takes these arguments and an implicit argument.
2711 TYPE is the type field of the ".stab" symbol entry.
2712 DESC is the desc field of the ".stab" entry.
2713 VALU is the value field of the ".stab" entry.
2714 NAME is the symbol name, in our address space.
2715 SECTION_OFFSETS is a set of amounts by which the sections of this
2716 object file were relocated when it was loaded into memory. Note
2717 that these section_offsets are not the objfile->section_offsets but
2718 the pst->section_offsets. All symbols that refer to memory
2719 locations need to be offset by these amounts.
2720 OBJFILE is the object file from which we are reading symbols. It
2721 is used in end_symtab. */
2724 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2725 struct section_offsets
*section_offsets
,
2726 struct objfile
*objfile
)
2728 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2729 struct context_stack
*new;
2730 /* This remembers the address of the start of a function. It is
2731 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2732 are relative to the current function's start address. On systems
2733 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2734 and is used to relocate these symbol types rather than
2736 static CORE_ADDR function_start_offset
;
2738 /* This holds the address of the start of a function, without the
2739 system peculiarities of function_start_offset. */
2740 static CORE_ADDR last_function_start
;
2742 /* If this is nonzero, we've seen an N_SLINE since the start of the
2743 current function. We use this to tell us to move the first sline
2744 to the beginning of the function regardless of what its given
2746 static int sline_found_in_function
= 1;
2748 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2749 source file. Used to detect the SunPRO solaris compiler. */
2750 static int n_opt_found
;
2752 /* The stab type used for the definition of the last function.
2753 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2754 static int function_stab_type
= 0;
2756 if (!block_address_function_relative
)
2758 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2759 function start address, so just use the text offset. */
2760 function_start_offset
=
2761 ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2764 /* Something is wrong if we see real data before seeing a source
2767 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
2769 /* Ignore any symbols which appear before an N_SO symbol.
2770 Currently no one puts symbols there, but we should deal
2771 gracefully with the case. A complain()t might be in order,
2772 but this should not be an error (). */
2781 if (*name
== '\000')
2783 /* This N_FUN marks the end of a function. This closes off
2784 the current block. */
2785 struct block
*block
;
2787 if (context_stack_depth
<= 0)
2789 lbrac_mismatch_complaint (symnum
);
2793 /* The following check is added before recording line 0 at
2794 end of function so as to handle hand-generated stabs
2795 which may have an N_FUN stabs at the end of the function,
2796 but no N_SLINE stabs. */
2797 if (sline_found_in_function
)
2799 CORE_ADDR addr
= last_function_start
+ valu
;
2801 record_line (current_subfile
, 0,
2802 gdbarch_addr_bits_remove (gdbarch
, addr
));
2805 within_function
= 0;
2806 new = pop_context ();
2808 /* Make a block for the local symbols within. */
2809 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
2810 new->start_addr
, new->start_addr
+ valu
,
2813 /* For C++, set the block's scope. */
2814 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
2815 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
2818 /* May be switching to an assembler file which may not be using
2819 block relative stabs, so reset the offset. */
2820 if (block_address_function_relative
)
2821 function_start_offset
= 0;
2826 sline_found_in_function
= 0;
2828 /* Relocate for dynamic loading. */
2829 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2830 valu
= gdbarch_addr_bits_remove (gdbarch
, valu
);
2831 last_function_start
= valu
;
2833 goto define_a_symbol
;
2836 /* This "symbol" just indicates the start of an inner lexical
2837 context within a function. */
2839 /* Ignore extra outermost context from SunPRO cc and acc. */
2840 if (n_opt_found
&& desc
== 1)
2843 if (block_address_function_relative
)
2844 /* Relocate for Sun ELF acc fn-relative syms. */
2845 valu
+= function_start_offset
;
2847 /* On most machines, the block addresses are relative to the
2848 N_SO, the linker did not relocate them (sigh). */
2849 valu
+= last_source_start_addr
;
2851 push_context (desc
, valu
);
2855 /* This "symbol" just indicates the end of an inner lexical
2856 context that was started with N_LBRAC. */
2858 /* Ignore extra outermost context from SunPRO cc and acc. */
2859 if (n_opt_found
&& desc
== 1)
2862 if (block_address_function_relative
)
2863 /* Relocate for Sun ELF acc fn-relative syms. */
2864 valu
+= function_start_offset
;
2866 /* On most machines, the block addresses are relative to the
2867 N_SO, the linker did not relocate them (sigh). */
2868 valu
+= last_source_start_addr
;
2870 if (context_stack_depth
<= 0)
2872 lbrac_mismatch_complaint (symnum
);
2876 new = pop_context ();
2877 if (desc
!= new->depth
)
2878 lbrac_mismatch_complaint (symnum
);
2880 if (local_symbols
!= NULL
)
2882 /* GCC development snapshots from March to December of
2883 2000 would output N_LSYM entries after N_LBRAC
2884 entries. As a consequence, these symbols are simply
2885 discarded. Complain if this is the case. */
2886 complaint (&symfile_complaints
,
2887 _("misplaced N_LBRAC entry; discarding local "
2888 "symbols which have no enclosing block"));
2890 local_symbols
= new->locals
;
2892 if (context_stack_depth
> 1)
2894 /* This is not the outermost LBRAC...RBRAC pair in the
2895 function, its local symbols preceded it, and are the ones
2896 just recovered from the context stack. Define the block
2897 for them (but don't bother if the block contains no
2898 symbols. Should we complain on blocks without symbols?
2899 I can't think of any useful purpose for them). */
2900 if (local_symbols
!= NULL
)
2902 /* Muzzle a compiler bug that makes end < start.
2904 ??? Which compilers? Is this ever harmful?. */
2905 if (new->start_addr
> valu
)
2907 complaint (&symfile_complaints
,
2908 _("block start larger than block end"));
2909 new->start_addr
= valu
;
2911 /* Make a block for the local symbols within. */
2912 finish_block (0, &local_symbols
, new->old_blocks
,
2913 new->start_addr
, valu
, objfile
);
2918 /* This is the outermost LBRAC...RBRAC pair. There is no
2919 need to do anything; leave the symbols that preceded it
2920 to be attached to the function's own block. We need to
2921 indicate that we just moved outside of the function. */
2922 within_function
= 0;
2929 /* This kind of symbol indicates the start of an object file.
2930 Relocate for dynamic loading. */
2931 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2935 /* This type of symbol indicates the start of data for one
2936 source file. Finish the symbol table of the previous source
2937 file (if any) and start accumulating a new symbol table.
2938 Relocate for dynamic loading. */
2939 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2943 if (last_source_file
)
2945 /* Check if previous symbol was also an N_SO (with some
2946 sanity checks). If so, that one was actually the
2947 directory name, and the current one is the real file
2948 name. Patch things up. */
2949 if (previous_stab_code
== (unsigned char) N_SO
)
2951 patch_subfile_names (current_subfile
, name
);
2952 break; /* Ignore repeated SOs. */
2954 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2958 /* Null name means this just marks the end of text for this .o
2959 file. Don't start a new symtab in this case. */
2960 if (*name
== '\000')
2963 if (block_address_function_relative
)
2964 function_start_offset
= 0;
2967 start_symtab (name
, NULL
, valu
);
2968 record_debugformat ("stabs");
2972 /* This type of symbol indicates the start of data for a
2973 sub-source-file, one whose contents were copied or included
2974 in the compilation of the main source file (whose name was
2975 given in the N_SO symbol). Relocate for dynamic loading. */
2976 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2977 start_subfile (name
, current_subfile
->dirname
);
2982 add_new_header_file (name
, valu
);
2983 start_subfile (name
, current_subfile
->dirname
);
2987 start_subfile (pop_subfile (), current_subfile
->dirname
);
2991 add_old_header_file (name
, valu
);
2995 /* This type of "symbol" really just records one line-number --
2996 core-address correspondence. Enter it in the line list for
2997 this symbol table. */
2999 /* Relocate for dynamic loading and for ELF acc
3000 function-relative symbols. */
3001 valu
+= function_start_offset
;
3003 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
3004 middle of the prologue instead of right at the start of the
3005 function. To deal with this we record the address for the
3006 first N_SLINE stab to be the start of the function instead of
3007 the listed location. We really shouldn't to this. When
3008 compiling with optimization, this first N_SLINE stab might be
3009 optimized away. Other (non-GCC) compilers don't emit this
3010 stab at all. There is no real harm in having an extra
3011 numbered line, although it can be a bit annoying for the
3012 user. However, it totally screws up our testsuite.
3014 So for now, keep adjusting the address of the first N_SLINE
3015 stab, but only for code compiled with GCC. */
3017 if (within_function
&& sline_found_in_function
== 0)
3019 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
3020 last_function_start
: valu
;
3022 record_line (current_subfile
, desc
,
3023 gdbarch_addr_bits_remove (gdbarch
, addr
));
3024 sline_found_in_function
= 1;
3027 record_line (current_subfile
, desc
,
3028 gdbarch_addr_bits_remove (gdbarch
, valu
));
3032 common_block_start (name
, objfile
);
3036 common_block_end (objfile
);
3039 /* The following symbol types need to have the appropriate
3040 offset added to their value; then we process symbol
3041 definitions in the name. */
3043 case N_STSYM
: /* Static symbol in data segment. */
3044 case N_LCSYM
: /* Static symbol in BSS segment. */
3045 case N_ROSYM
: /* Static symbol in read-only data segment. */
3046 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3047 Solaris 2's stabs-in-elf makes *most* symbols relative but
3048 leaves a few absolute (at least for Solaris 2.1 and version
3049 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3050 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3051 relocates it) .stab "foo:V...",N_STSYM is relative (section
3052 base subtracted). This leaves us no choice but to search for
3053 the 'S' or 'V'... (or pass the whole section_offsets stuff
3054 down ONE MORE function call level, which we really don't want
3059 /* Normal object file and NLMs have non-zero text seg offsets,
3060 but don't need their static syms offset in this fashion.
3061 XXX - This is really a crock that should be fixed in the
3062 solib handling code so that I don't have to work around it
3065 if (!symfile_relocatable
)
3067 p
= strchr (name
, ':');
3068 if (p
!= 0 && p
[1] == 'S')
3070 /* The linker relocated it. We don't want to add an
3071 elfstab_offset_sections-type offset, but we *do*
3072 want to add whatever solib.c passed to
3073 symbol_file_add as addr (this is known to affect
3074 SunOS 4, and I suspect ELF too). Since
3075 elfstab_offset_sections currently does not muck
3076 with the text offset (there is no Ttext.text
3077 symbol), we can get addr from the text offset. If
3078 elfstab_offset_sections ever starts dealing with
3079 the text offset, and we still need to do this, we
3080 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3081 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3082 goto define_a_symbol
;
3085 /* Since it's not the kludge case, re-dispatch to the right
3096 internal_error (__FILE__
, __LINE__
,
3097 _("failed internal consistency check"));
3101 case_N_STSYM
: /* Static symbol in data segment. */
3102 case N_DSLINE
: /* Source line number, data segment. */
3103 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3104 goto define_a_symbol
;
3106 case_N_LCSYM
: /* Static symbol in BSS segment. */
3107 case N_BSLINE
: /* Source line number, BSS segment. */
3108 /* N_BROWS: overlaps with N_BSLINE. */
3109 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3110 goto define_a_symbol
;
3112 case_N_ROSYM
: /* Static symbol in read-only data segment. */
3113 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3114 goto define_a_symbol
;
3116 case N_ENTRY
: /* Alternate entry point. */
3117 /* Relocate for dynamic loading. */
3118 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3119 goto define_a_symbol
;
3121 /* The following symbol types we don't know how to process.
3122 Handle them in a "default" way, but complain to people who
3125 case N_CATCH
: /* Exception handler catcher. */
3126 case N_EHDECL
: /* Exception handler name. */
3127 case N_PC
: /* Global symbol in Pascal. */
3128 case N_M2C
: /* Modula-2 compilation unit. */
3129 /* N_MOD2: overlaps with N_EHDECL. */
3130 case N_SCOPE
: /* Modula-2 scope information. */
3131 case N_ECOML
: /* End common (local name). */
3132 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3137 unknown_symtype_complaint (hex_string (type
));
3140 /* The following symbol types don't need the address field
3141 relocated, since it is either unused, or is absolute. */
3143 case N_GSYM
: /* Global variable. */
3144 case N_NSYMS
: /* Number of symbols (Ultrix). */
3145 case N_NOMAP
: /* No map? (Ultrix). */
3146 case N_RSYM
: /* Register variable. */
3147 case N_DEFD
: /* Modula-2 GNU module dependency. */
3148 case N_SSYM
: /* Struct or union element. */
3149 case N_LSYM
: /* Local symbol in stack. */
3150 case N_PSYM
: /* Parameter variable. */
3151 case N_LENG
: /* Length of preceding symbol type. */
3155 char *colon_pos
= strchr (name
, ':');
3157 if (colon_pos
== NULL
)
3160 deftype
= colon_pos
[1];
3166 function_stab_type
= type
;
3168 /* Deal with the SunPRO 3.0 compiler which omits the
3169 address from N_FUN symbols. */
3171 && valu
== ANOFFSET (section_offsets
,
3172 SECT_OFF_TEXT (objfile
))
3173 && gdbarch_sofun_address_maybe_missing (gdbarch
))
3175 CORE_ADDR minsym_valu
=
3176 find_stab_function_addr (name
, last_source_file
, objfile
);
3178 /* The function find_stab_function_addr will return
3179 0 if the minimal symbol wasn't found.
3180 (Unfortunately, this might also be a valid
3181 address.) Anyway, if it *does* return 0, it is
3182 likely that the value was set correctly to begin
3184 if (minsym_valu
!= 0)
3188 if (block_address_function_relative
)
3189 /* For Solaris 2 compilers, the block addresses and
3190 N_SLINE's are relative to the start of the
3191 function. On normal systems, and when using GCC on
3192 Solaris 2, these addresses are just absolute, or
3193 relative to the N_SO, depending on
3194 BLOCK_ADDRESS_ABSOLUTE. */
3195 function_start_offset
= valu
;
3197 within_function
= 1;
3199 if (context_stack_depth
> 1)
3201 complaint (&symfile_complaints
,
3202 _("unmatched N_LBRAC before symtab pos %d"),
3207 if (context_stack_depth
> 0)
3209 struct block
*block
;
3211 new = pop_context ();
3212 /* Make a block for the local symbols within. */
3213 block
= finish_block (new->name
, &local_symbols
,
3214 new->old_blocks
, new->start_addr
,
3217 /* For C++, set the block's scope. */
3218 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
3219 cp_set_block_scope (new->name
, block
,
3220 &objfile
->objfile_obstack
,
3224 new = push_context (0, valu
);
3225 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3229 define_symbol (valu
, name
, desc
, type
, objfile
);
3235 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3236 for a bunch of other flags, too. Someday we may parse their
3237 flags; for now we ignore theirs and hope they'll ignore ours. */
3238 case N_OPT
: /* Solaris 2: Compiler options. */
3241 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3243 processing_gcc_compilation
= 2;
3244 #if 0 /* Works, but is experimental. -fnf */
3245 /* For now, stay with AUTO_DEMANGLING for g++ output, as
3246 we don't know whether it will use the old style or v3
3248 if (AUTO_DEMANGLING
)
3250 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
3259 case N_MAIN
: /* Name of main routine. */
3260 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3261 it with a symbol file with "main" and without N_MAIN. I'm
3262 not sure exactly what rule to follow but probably something
3263 like: N_MAIN takes precedence over "main" no matter what
3264 objfile it is in; If there is more than one N_MAIN, choose
3265 the one in the symfile_objfile; If there is more than one
3266 N_MAIN within a given objfile, complain() and choose
3267 arbitrarily. (kingdon) */
3269 set_main_name (name
);
3272 /* The following symbol types can be ignored. */
3273 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3274 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3275 /* N_UNDF: Solaris 2: File separator mark. */
3276 /* N_UNDF: -- we will never encounter it, since we only process
3277 one file's symbols at once. */
3278 case N_ENDM
: /* Solaris 2: End of module. */
3279 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3283 /* '#' is a GNU C extension to allow one symbol to refer to another
3286 Generally this is used so that an alias can refer to its main
3291 /* Initialize symbol reference names and determine if this is a
3292 definition. If a symbol reference is being defined, go ahead
3293 and add it. Otherwise, just return. */
3298 /* If this stab defines a new reference ID that is not on the
3299 reference list, then put it on the reference list.
3301 We go ahead and advance NAME past the reference, even though
3302 it is not strictly necessary at this time. */
3303 refnum
= symbol_reference_defined (&s
);
3305 if (!ref_search (refnum
))
3306 ref_add (refnum
, 0, name
, valu
);
3310 previous_stab_code
= type
;
3313 /* FIXME: The only difference between this and elfstab_build_psymtabs
3314 is the call to install_minimal_symbols for elf, and the support for
3315 split sections. If the differences are really that small, the code
3316 should be shared. */
3318 /* Scan and build partial symbols for an coff symbol file.
3319 The coff file has already been processed to get its minimal symbols.
3321 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3324 OBJFILE is the object file we are reading symbols from.
3325 ADDR is the address relative to which the symbols are (e.g.
3326 the base address of the text segment).
3327 TEXTADDR is the address of the text section.
3328 TEXTSIZE is the size of the text section.
3329 STABSECTS is the list of .stab sections in OBJFILE.
3330 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3331 .stabstr section exists.
3333 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3334 adjusted for coff details. */
3337 coffstab_build_psymtabs (struct objfile
*objfile
,
3338 CORE_ADDR textaddr
, unsigned int textsize
,
3339 struct stab_section_list
*stabsects
,
3340 file_ptr stabstroffset
, unsigned int stabstrsize
)
3343 bfd
*sym_bfd
= objfile
->obfd
;
3344 char *name
= bfd_get_filename (sym_bfd
);
3345 struct dbx_symfile_info
*info
;
3346 unsigned int stabsize
;
3348 /* There is already a dbx_symfile_info allocated by our caller.
3349 It might even contain some info from the coff symtab to help us. */
3350 info
= DBX_SYMFILE_INFO (objfile
);
3352 DBX_TEXT_ADDR (objfile
) = textaddr
;
3353 DBX_TEXT_SIZE (objfile
) = textsize
;
3355 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3356 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3357 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3359 if (stabstrsize
> bfd_get_size (sym_bfd
))
3360 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3361 DBX_STRINGTAB (objfile
) = (char *)
3362 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3363 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3365 /* Now read in the string table in one big gulp. */
3367 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3369 perror_with_name (name
);
3370 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3371 if (val
!= stabstrsize
)
3372 perror_with_name (name
);
3374 stabsread_new_init ();
3375 buildsym_new_init ();
3376 free_header_files ();
3377 init_header_files ();
3379 processing_acc_compilation
= 1;
3381 /* In a coff file, we've already installed the minimal symbols that came
3382 from the coff (non-stab) symbol table, so always act like an
3383 incremental load here. */
3384 if (stabsects
->next
== NULL
)
3386 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3387 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3388 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3392 struct stab_section_list
*stabsect
;
3394 DBX_SYMCOUNT (objfile
) = 0;
3395 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3397 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3398 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3401 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3403 symbuf_sections
= stabsects
->next
;
3404 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3408 dbx_symfile_read (objfile
, 0);
3411 /* Scan and build partial symbols for an ELF symbol file.
3412 This ELF file has already been processed to get its minimal symbols.
3414 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3417 OBJFILE is the object file we are reading symbols from.
3418 ADDR is the address relative to which the symbols are (e.g.
3419 the base address of the text segment).
3420 STABSECT is the BFD section information for the .stab section.
3421 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3422 .stabstr section exists.
3424 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3425 adjusted for elf details. */
3428 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
3429 file_ptr stabstroffset
, unsigned int stabstrsize
)
3432 bfd
*sym_bfd
= objfile
->obfd
;
3433 char *name
= bfd_get_filename (sym_bfd
);
3434 struct dbx_symfile_info
*info
;
3435 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
3437 /* There is already a dbx_symfile_info allocated by our caller.
3438 It might even contain some info from the ELF symtab to help us. */
3439 info
= DBX_SYMFILE_INFO (objfile
);
3441 /* Find the first and last text address. dbx_symfile_read seems to
3443 find_text_range (sym_bfd
, objfile
);
3445 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3446 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3447 DBX_SYMCOUNT (objfile
)
3448 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3449 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3450 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3451 DBX_STAB_SECTION (objfile
) = stabsect
;
3453 if (stabstrsize
> bfd_get_size (sym_bfd
))
3454 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3455 DBX_STRINGTAB (objfile
) = (char *)
3456 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3457 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3459 /* Now read in the string table in one big gulp. */
3461 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3463 perror_with_name (name
);
3464 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3465 if (val
!= stabstrsize
)
3466 perror_with_name (name
);
3468 stabsread_new_init ();
3469 buildsym_new_init ();
3470 free_header_files ();
3471 init_header_files ();
3473 processing_acc_compilation
= 1;
3476 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3477 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3479 make_cleanup (free_current_contents
, (void *) &stabs_data
);
3481 /* In an elf file, we've already installed the minimal symbols that came
3482 from the elf (non-stab) symbol table, so always act like an
3483 incremental load here. dbx_symfile_read should not generate any new
3484 minimal symbols, since we will have already read the ELF dynamic symbol
3485 table and normal symbol entries won't be in the ".stab" section; but in
3486 case it does, it will install them itself. */
3487 dbx_symfile_read (objfile
, 0);
3489 do_cleanups (back_to
);
3492 /* Scan and build partial symbols for a file with special sections for stabs
3493 and stabstrings. The file has already been processed to get its minimal
3494 symbols, and any other symbols that might be necessary to resolve GSYMs.
3496 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3499 OBJFILE is the object file we are reading symbols from.
3500 ADDR is the address relative to which the symbols are (e.g. the base address
3501 of the text segment).
3502 STAB_NAME is the name of the section that contains the stabs.
3503 STABSTR_NAME is the name of the section that contains the stab strings.
3505 This routine is mostly copied from dbx_symfile_init and
3506 dbx_symfile_read. */
3509 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3510 char *stabstr_name
, char *text_name
)
3513 bfd
*sym_bfd
= objfile
->obfd
;
3514 char *name
= bfd_get_filename (sym_bfd
);
3516 asection
*stabstrsect
;
3517 asection
*text_sect
;
3518 struct dbx_symfile_info
*dbx
;
3520 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3521 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3527 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3528 "but not string section (%s)"),
3529 stab_name
, stabstr_name
);
3531 dbx
= XCNEW (struct dbx_symfile_info
);
3532 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
3534 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3536 error (_("Can't find %s section in symbol file"), text_name
);
3537 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3538 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3540 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3541 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3542 / DBX_SYMBOL_SIZE (objfile
);
3543 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3544 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING
3548 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3549 error (_("ridiculous string table size: %d bytes"),
3550 DBX_STRINGTAB_SIZE (objfile
));
3551 DBX_STRINGTAB (objfile
) = (char *)
3552 obstack_alloc (&objfile
->objfile_obstack
,
3553 DBX_STRINGTAB_SIZE (objfile
) + 1);
3554 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3556 /* Now read in the string table in one big gulp. */
3558 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3559 stabstrsect
, /* bfd section */
3560 DBX_STRINGTAB (objfile
), /* input buffer */
3561 0, /* offset into section */
3562 DBX_STRINGTAB_SIZE (objfile
)); /* amount to
3566 perror_with_name (name
);
3568 stabsread_new_init ();
3569 buildsym_new_init ();
3570 free_header_files ();
3571 init_header_files ();
3573 /* Now, do an incremental load. */
3575 processing_acc_compilation
= 1;
3576 dbx_symfile_read (objfile
, 0);
3579 static const struct sym_fns aout_sym_fns
=
3581 bfd_target_aout_flavour
,
3582 dbx_new_init
, /* init anything gbl to entire symtab */
3583 dbx_symfile_init
, /* read initial info, setup for sym_read() */
3584 dbx_symfile_read
, /* read a symbol file into symtab */
3585 NULL
, /* sym_read_psymbols */
3586 dbx_symfile_finish
, /* finished with file, cleanup */
3587 default_symfile_offsets
, /* parse user's offsets to internal form */
3588 default_symfile_segments
, /* Get segment information from a file. */
3590 default_symfile_relocate
, /* Relocate a debug section. */
3591 NULL
, /* sym_probe_fns */
3596 _initialize_dbxread (void)
3598 add_symtab_fns (&aout_sym_fns
);
3600 dbx_objfile_data_key
3601 = register_objfile_data_with_cleanup (NULL
, dbx_free_symfile_info
);