1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2004, 2008-2012 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 /* We put a pointer to this structure in the read_symtab_private field
72 /* Offset within the file symbol table of first local symbol for this
77 /* Length (in bytes) of the section of the symbol table devoted to
78 this file's symbols (actually, the section bracketed may contain
79 more than just this file's symbols). If ldsymlen is 0, the only
80 reason for this thing's existence is the dependency list. Nothing
81 else will happen when it is read in. */
85 /* The size of each symbol in the symbol file (in external form). */
89 /* Further information needed to locate the symbols if they are in
94 int file_string_offset
;
97 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
98 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
99 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
100 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
101 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
102 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
103 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
106 /* The objfile we are currently reading. */
108 static struct objfile
*dbxread_objfile
;
110 /* Remember what we deduced to be the source language of this psymtab. */
112 static enum language psymtab_language
= language_unknown
;
114 /* The BFD for this file -- implicit parameter to next_symbol_text. */
116 static bfd
*symfile_bfd
;
118 /* The size of each symbol in the symbol file (in external form).
119 This is set by dbx_symfile_read when building psymtabs, and by
120 dbx_psymtab_to_symtab when building symtabs. */
122 static unsigned symbol_size
;
124 /* This is the offset of the symbol table in the executable file. */
126 static unsigned symbol_table_offset
;
128 /* This is the offset of the string table in the executable file. */
130 static unsigned string_table_offset
;
132 /* For elf+stab executables, the n_strx field is not a simple index
133 into the string table. Instead, each .o file has a base offset in
134 the string table, and the associated symbols contain offsets from
135 this base. The following two variables contain the base offset for
136 the current and next .o files. */
138 static unsigned int file_string_table_offset
;
139 static unsigned int next_file_string_table_offset
;
141 /* .o and NLM files contain unrelocated addresses which are based at
142 0. When non-zero, this flag disables some of the special cases for
143 Solaris elf+stab text addresses at location 0. */
145 static int symfile_relocatable
= 0;
147 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
148 relative to the function start address. */
150 static int block_address_function_relative
= 0;
152 /* The lowest text address we have yet encountered. This is needed
153 because in an a.out file, there is no header field which tells us
154 what address the program is actually going to be loaded at, so we
155 need to make guesses based on the symbols (which *are* relocated to
156 reflect the address it will be loaded at). */
158 static CORE_ADDR lowest_text_address
;
160 /* Non-zero if there is any line number info in the objfile. Prevents
161 end_psymtab from discarding an otherwise empty psymtab. */
163 static int has_line_numbers
;
165 /* Complaints about the symbols we have encountered. */
168 unknown_symtype_complaint (const char *arg1
)
170 complaint (&symfile_complaints
, _("unknown symbol type %s"), arg1
);
174 lbrac_mismatch_complaint (int arg1
)
176 complaint (&symfile_complaints
,
177 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1
);
181 repeated_header_complaint (const char *arg1
, int arg2
)
183 complaint (&symfile_complaints
,
184 _("\"repeated\" header file %s not "
185 "previously seen, at symtab pos %d"),
189 /* find_text_range --- find start and end of loadable code sections
191 The find_text_range function finds the shortest address range that
192 encloses all sections containing executable code, and stores it in
193 objfile's text_addr and text_size members.
195 dbx_symfile_read will use this to finish off the partial symbol
196 table, in some cases. */
199 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
206 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
207 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
209 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
210 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
214 if (sec_start
< start
)
229 error (_("Can't find any code sections in symbol file"));
231 DBX_TEXT_ADDR (objfile
) = start
;
232 DBX_TEXT_SIZE (objfile
) = end
- start
;
237 /* During initial symbol readin, we need to have a structure to keep
238 track of which psymtabs have which bincls in them. This structure
239 is used during readin to setup the list of dependencies within each
240 partial symbol table. */
242 struct header_file_location
244 char *name
; /* Name of header file */
245 int instance
; /* See above */
246 struct partial_symtab
*pst
; /* Partial symtab that has the
247 BINCL/EINCL defs for this file. */
250 /* The actual list and controling variables. */
251 static struct header_file_location
*bincl_list
, *next_bincl
;
252 static int bincls_allocated
;
254 /* Local function prototypes. */
256 extern void _initialize_dbxread (void);
258 static void read_ofile_symtab (struct partial_symtab
*);
260 static void dbx_psymtab_to_symtab (struct partial_symtab
*);
262 static void dbx_psymtab_to_symtab_1 (struct partial_symtab
*);
264 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
266 static void read_dbx_symtab (struct objfile
*);
268 static void free_bincl_list (struct objfile
*);
270 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
272 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
274 static void init_bincl_list (int, struct objfile
*);
276 static char *dbx_next_symbol_text (struct objfile
*);
278 static void fill_symbuf (bfd
*);
280 static void dbx_symfile_init (struct objfile
*);
282 static void dbx_new_init (struct objfile
*);
284 static void dbx_symfile_read (struct objfile
*, int);
286 static void dbx_symfile_finish (struct objfile
*);
288 static void record_minimal_symbol (char *, CORE_ADDR
, int, struct objfile
*);
290 static void add_new_header_file (char *, int);
292 static void add_old_header_file (char *, int);
294 static void add_this_object_header_file (int);
296 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
298 struct partial_symbol
**,
299 struct partial_symbol
**);
301 /* Free up old header file tables. */
304 free_header_files (void)
306 if (this_object_header_files
)
308 xfree (this_object_header_files
);
309 this_object_header_files
= NULL
;
311 n_allocated_this_object_header_files
= 0;
314 /* Allocate new header file tables. */
317 init_header_files (void)
319 n_allocated_this_object_header_files
= 10;
320 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
323 /* Add header file number I for this object file
324 at the next successive FILENUM. */
327 add_this_object_header_file (int i
)
329 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
331 n_allocated_this_object_header_files
*= 2;
332 this_object_header_files
333 = (int *) xrealloc ((char *) this_object_header_files
,
334 n_allocated_this_object_header_files
* sizeof (int));
337 this_object_header_files
[n_this_object_header_files
++] = i
;
340 /* Add to this file an "old" header file, one already seen in
341 a previous object file. NAME is the header file's name.
342 INSTANCE is its instance code, to select among multiple
343 symbol tables for the same header file. */
346 add_old_header_file (char *name
, int instance
)
348 struct header_file
*p
= HEADER_FILES (dbxread_objfile
);
351 for (i
= 0; i
< N_HEADER_FILES (dbxread_objfile
); i
++)
352 if (filename_cmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
354 add_this_object_header_file (i
);
357 repeated_header_complaint (name
, symnum
);
360 /* Add to this file a "new" header file: definitions for its types follow.
361 NAME is the header file's name.
362 Most often this happens only once for each distinct header file,
363 but not necessarily. If it happens more than once, INSTANCE has
364 a different value each time, and references to the header file
365 use INSTANCE values to select among them.
367 dbx output contains "begin" and "end" markers for each new header file,
368 but at this level we just need to know which files there have been;
369 so we record the file when its "begin" is seen and ignore the "end". */
372 add_new_header_file (char *name
, int instance
)
375 struct header_file
*hfile
;
377 /* Make sure there is room for one more header file. */
379 i
= N_ALLOCATED_HEADER_FILES (dbxread_objfile
);
381 if (N_HEADER_FILES (dbxread_objfile
) == i
)
385 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = 10;
386 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
387 xmalloc (10 * sizeof (struct header_file
));
392 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = i
;
393 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
394 xrealloc ((char *) HEADER_FILES (dbxread_objfile
),
395 (i
* sizeof (struct header_file
)));
399 /* Create an entry for this header file. */
401 i
= N_HEADER_FILES (dbxread_objfile
)++;
402 hfile
= HEADER_FILES (dbxread_objfile
) + i
;
403 hfile
->name
= xstrdup (name
);
404 hfile
->instance
= instance
;
407 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
408 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
410 add_this_object_header_file (i
);
414 static struct type
**
415 explicit_lookup_type (int real_filenum
, int index
)
417 struct header_file
*f
= &HEADER_FILES (dbxread_objfile
)[real_filenum
];
419 if (index
>= f
->length
)
422 f
->vector
= (struct type
**)
423 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
424 memset (&f
->vector
[f
->length
/ 2],
425 '\0', f
->length
* sizeof (struct type
*) / 2);
427 return &f
->vector
[index
];
432 record_minimal_symbol (char *name
, CORE_ADDR address
, int type
,
433 struct objfile
*objfile
)
435 enum minimal_symbol_type ms_type
;
437 asection
*bfd_section
;
443 section
= SECT_OFF_TEXT (objfile
);
444 bfd_section
= DBX_TEXT_SECTION (objfile
);
448 section
= SECT_OFF_DATA (objfile
);
449 bfd_section
= DBX_DATA_SECTION (objfile
);
453 section
= SECT_OFF_BSS (objfile
);
454 bfd_section
= DBX_BSS_SECTION (objfile
);
464 section
= SECT_OFF_DATA (objfile
);
465 bfd_section
= DBX_DATA_SECTION (objfile
);
468 /* I don't think this type actually exists; since a N_SETV is the result
469 of going over many .o files, it doesn't make sense to have one
471 ms_type
= mst_file_data
;
472 section
= SECT_OFF_DATA (objfile
);
473 bfd_section
= DBX_DATA_SECTION (objfile
);
480 ms_type
= mst_file_text
;
481 section
= SECT_OFF_TEXT (objfile
);
482 bfd_section
= DBX_TEXT_SECTION (objfile
);
485 ms_type
= mst_file_data
;
487 /* Check for __DYNAMIC, which is used by Sun shared libraries.
488 Record it as global even if it's local, not global, so
489 lookup_minimal_symbol can find it. We don't check symbol_leading_char
490 because for SunOS4 it always is '_'. */
491 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
494 /* Same with virtual function tables, both global and static. */
496 char *tempstring
= name
;
498 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
500 if (is_vtable_name (tempstring
))
503 section
= SECT_OFF_DATA (objfile
);
504 bfd_section
= DBX_DATA_SECTION (objfile
);
507 ms_type
= mst_file_bss
;
508 section
= SECT_OFF_BSS (objfile
);
509 bfd_section
= DBX_BSS_SECTION (objfile
);
512 ms_type
= mst_unknown
;
518 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
519 && address
< lowest_text_address
)
520 lowest_text_address
= address
;
522 prim_record_minimal_symbol_and_info
523 (name
, address
, ms_type
, section
, bfd_section
, objfile
);
526 /* Scan and build partial symbols for a symbol file.
527 We have been initialized by a call to dbx_symfile_init, which
528 put all the relevant info into a "struct dbx_symfile_info",
529 hung off the objfile structure. */
532 dbx_symfile_read (struct objfile
*objfile
, int symfile_flags
)
536 struct cleanup
*back_to
;
538 sym_bfd
= objfile
->obfd
;
540 /* .o and .nlm files are relocatables with text, data and bss segs based at
541 0. This flag disables special (Solaris stabs-in-elf only) fixups for
542 symbols with a value of 0. */
544 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
546 /* This is true for Solaris (and all other systems which put stabs
547 in sections, hopefully, since it would be silly to do things
548 differently from Solaris), and false for SunOS4 and other a.out
550 block_address_function_relative
=
551 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
552 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
553 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
554 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
555 || (0 == strncmp (bfd_get_target (sym_bfd
), "epoc-pe", 7))
556 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
558 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
560 perror_with_name (objfile
->name
);
562 /* Size the symbol table. */
563 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
564 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
566 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
567 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
569 free_pending_blocks ();
570 back_to
= make_cleanup (really_free_pendings
, 0);
572 init_minimal_symbol_collection ();
573 make_cleanup_discard_minimal_symbols ();
575 /* Read stabs data from executable file and define symbols. */
577 read_dbx_symtab (objfile
);
579 /* Add the dynamic symbols. */
581 read_dbx_dynamic_symtab (objfile
);
583 /* Install any minimal symbols that have been collected as the current
584 minimal symbols for this objfile. */
586 install_minimal_symbols (objfile
);
588 do_cleanups (back_to
);
591 /* Initialize anything that needs initializing when a completely new
592 symbol file is specified (not just adding some symbols from another
593 file, e.g. a shared library). */
596 dbx_new_init (struct objfile
*ignore
)
598 stabsread_new_init ();
599 buildsym_new_init ();
600 init_header_files ();
604 /* dbx_symfile_init ()
605 is the dbx-specific initialization routine for reading symbols.
606 It is passed a struct objfile which contains, among other things,
607 the BFD for the file whose symbols are being read, and a slot for a pointer
608 to "private data" which we fill with goodies.
610 We read the string table into malloc'd space and stash a pointer to it.
612 Since BFD doesn't know how to read debug symbols in a format-independent
613 way (and may never do so...), we have to do it ourselves. We will never
614 be called unless this is an a.out (or very similar) file.
615 FIXME, there should be a cleaner peephole into the BFD environment here. */
617 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
620 dbx_symfile_init (struct objfile
*objfile
)
623 bfd
*sym_bfd
= objfile
->obfd
;
624 char *name
= bfd_get_filename (sym_bfd
);
626 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
628 /* Allocate struct to keep track of the symfile. */
629 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
630 xmalloc (sizeof (struct dbx_symfile_info
));
631 memset (objfile
->deprecated_sym_stab_info
, 0,
632 sizeof (struct dbx_symfile_info
));
634 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
635 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
636 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
638 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
639 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
640 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
642 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
644 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
646 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
648 error (_("Can't find .text section in symbol file"));
649 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
650 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
652 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
653 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
654 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
656 /* Read the string table and stash it away in the objfile_obstack.
657 When we blow away the objfile the string table goes away as well.
658 Note that gdb used to use the results of attempting to malloc the
659 string table, based on the size it read, as a form of sanity check
660 for botched byte swapping, on the theory that a byte swapped string
661 table size would be so totally bogus that the malloc would fail. Now
662 that we put in on the objfile_obstack, we can't do this since gdb gets
663 a fatal error (out of virtual memory) if the size is bogus. We can
664 however at least check to see if the size is less than the size of
665 the size field itself, or larger than the size of the entire file.
666 Note that all valid string tables have a size greater than zero, since
667 the bytes used to hold the size are included in the count. */
669 if (STRING_TABLE_OFFSET
== 0)
671 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
672 will never be zero, even when there is no string table. This
673 would appear to be a bug in bfd. */
674 DBX_STRINGTAB_SIZE (objfile
) = 0;
675 DBX_STRINGTAB (objfile
) = NULL
;
679 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
681 perror_with_name (name
);
683 memset (size_temp
, 0, sizeof (size_temp
));
684 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
687 perror_with_name (name
);
691 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
692 EOF if there is no string table, and attempting to read the size
693 from EOF will read zero bytes. */
694 DBX_STRINGTAB_SIZE (objfile
) = 0;
695 DBX_STRINGTAB (objfile
) = NULL
;
699 /* Read some data that would appear to be the string table size.
700 If there really is a string table, then it is probably the right
701 size. Byteswap if necessary and validate the size. Note that
702 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
703 random data that happened to be at STRING_TABLE_OFFSET, because
704 bfd can't tell us there is no string table, the sanity checks may
705 or may not catch this. */
706 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
708 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
709 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
710 error (_("ridiculous string table size (%d bytes)."),
711 DBX_STRINGTAB_SIZE (objfile
));
713 DBX_STRINGTAB (objfile
) =
714 (char *) obstack_alloc (&objfile
->objfile_obstack
,
715 DBX_STRINGTAB_SIZE (objfile
));
716 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
718 /* Now read in the string table in one big gulp. */
720 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
722 perror_with_name (name
);
723 val
= bfd_bread (DBX_STRINGTAB (objfile
),
724 DBX_STRINGTAB_SIZE (objfile
),
726 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
727 perror_with_name (name
);
732 /* Perform any local cleanups required when we are done with a particular
733 objfile. I.E, we are in the process of discarding all symbol information
734 for an objfile, freeing up all memory held for it, and unlinking the
735 objfile struct from the global list of known objfiles. */
738 dbx_symfile_finish (struct objfile
*objfile
)
740 if (objfile
->deprecated_sym_stab_info
!= NULL
)
742 if (HEADER_FILES (objfile
) != NULL
)
744 int i
= N_HEADER_FILES (objfile
);
745 struct header_file
*hfiles
= HEADER_FILES (objfile
);
749 xfree (hfiles
[i
].name
);
750 xfree (hfiles
[i
].vector
);
754 xfree (objfile
->deprecated_sym_stab_info
);
756 free_header_files ();
760 /* Buffer for reading the symbol table entries. */
761 static struct external_nlist symbuf
[4096];
762 static int symbuf_idx
;
763 static int symbuf_end
;
765 /* Name of last function encountered. Used in Solaris to approximate
766 object file boundaries. */
767 static char *last_function_name
;
769 /* The address in memory of the string table of the object file we are
770 reading (which might not be the "main" object file, but might be a
771 shared library or some other dynamically loaded thing). This is
772 set by read_dbx_symtab when building psymtabs, and by
773 read_ofile_symtab when building symtabs, and is used only by
774 next_symbol_text. FIXME: If that is true, we don't need it when
775 building psymtabs, right? */
776 static char *stringtab_global
;
778 /* These variables are used to control fill_symbuf when the stabs
779 symbols are not contiguous (as may be the case when a COFF file is
780 linked using --split-by-reloc). */
781 static struct stab_section_list
*symbuf_sections
;
782 static unsigned int symbuf_left
;
783 static unsigned int symbuf_read
;
785 /* This variable stores a global stabs buffer, if we read stabs into
786 memory in one chunk in order to process relocations. */
787 static bfd_byte
*stabs_data
;
789 /* Refill the symbol table input buffer
790 and set the variables that control fetching entries from it.
791 Reports an error if no data available.
792 This function can read past the end of the symbol table
793 (into the string table) but this does no harm. */
796 fill_symbuf (bfd
*sym_bfd
)
803 nbytes
= sizeof (symbuf
);
804 if (nbytes
> symbuf_left
)
805 nbytes
= symbuf_left
;
806 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
808 else if (symbuf_sections
== NULL
)
810 count
= sizeof (symbuf
);
811 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
815 if (symbuf_left
<= 0)
817 file_ptr filepos
= symbuf_sections
->section
->filepos
;
819 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
820 perror_with_name (bfd_get_filename (sym_bfd
));
821 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
822 symbol_table_offset
= filepos
- symbuf_read
;
823 symbuf_sections
= symbuf_sections
->next
;
827 if (count
> sizeof (symbuf
))
828 count
= sizeof (symbuf
);
829 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
833 perror_with_name (bfd_get_filename (sym_bfd
));
834 else if (nbytes
== 0)
835 error (_("Premature end of file reading symbol table"));
836 symbuf_end
= nbytes
/ symbol_size
;
838 symbuf_left
-= nbytes
;
839 symbuf_read
+= nbytes
;
843 stabs_seek (int sym_offset
)
847 symbuf_read
+= sym_offset
;
848 symbuf_left
-= sym_offset
;
851 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
854 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
856 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
857 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
858 (intern).n_other = 0; \
859 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
860 if (bfd_get_sign_extend_vma (abfd)) \
861 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
863 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
866 /* Invariant: The symbol pointed to by symbuf_idx is the first one
867 that hasn't been swapped. Swap the symbol at the same time
868 that symbuf_idx is incremented. */
870 /* dbx allows the text of a symbol name to be continued into the
871 next symbol name! When such a continuation is encountered
872 (a \ at the end of the text of a name)
873 call this function to get the continuation. */
876 dbx_next_symbol_text (struct objfile
*objfile
)
878 struct internal_nlist nlist
;
880 if (symbuf_idx
== symbuf_end
)
881 fill_symbuf (symfile_bfd
);
884 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
885 OBJSTAT (objfile
, n_stabs
++);
889 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
892 /* Initialize the list of bincls to contain none and have some
896 init_bincl_list (int number
, struct objfile
*objfile
)
898 bincls_allocated
= number
;
899 next_bincl
= bincl_list
= (struct header_file_location
*)
900 xmalloc (bincls_allocated
* sizeof (struct header_file_location
));
903 /* Add a bincl to the list. */
906 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
908 if (next_bincl
>= bincl_list
+ bincls_allocated
)
910 int offset
= next_bincl
- bincl_list
;
912 bincls_allocated
*= 2;
913 bincl_list
= (struct header_file_location
*)
914 xrealloc ((char *) bincl_list
,
915 bincls_allocated
* sizeof (struct header_file_location
));
916 next_bincl
= bincl_list
+ offset
;
918 next_bincl
->pst
= pst
;
919 next_bincl
->instance
= instance
;
920 next_bincl
++->name
= name
;
923 /* Given a name, value pair, find the corresponding
924 bincl in the list. Return the partial symtab associated
925 with that header_file_location. */
927 static struct partial_symtab
*
928 find_corresponding_bincl_psymtab (char *name
, int instance
)
930 struct header_file_location
*bincl
;
932 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
933 if (bincl
->instance
== instance
934 && strcmp (name
, bincl
->name
) == 0)
937 repeated_header_complaint (name
, symnum
);
938 return (struct partial_symtab
*) 0;
941 /* Free the storage allocated for the bincl list. */
944 free_bincl_list (struct objfile
*objfile
)
947 bincls_allocated
= 0;
951 do_free_bincl_list_cleanup (void *objfile
)
953 free_bincl_list (objfile
);
956 static struct cleanup
*
957 make_cleanup_free_bincl_list (struct objfile
*objfile
)
959 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
962 /* Set namestring based on nlist. If the string table index is invalid,
963 give a fake name, and print a single error message per symbol file read,
964 rather than abort the symbol reading or flood the user with messages. */
967 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
971 if (nlist
->n_strx
+ file_string_table_offset
972 >= DBX_STRINGTAB_SIZE (objfile
)
973 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
975 complaint (&symfile_complaints
,
976 _("bad string table offset in symbol %d"),
978 namestring
= "<bad string table offset>";
981 namestring
= (nlist
->n_strx
+ file_string_table_offset
982 + DBX_STRINGTAB (objfile
));
986 /* Scan a SunOs dynamic symbol table for symbols of interest and
987 add them to the minimal symbol table. */
990 read_dbx_dynamic_symtab (struct objfile
*objfile
)
992 bfd
*abfd
= objfile
->obfd
;
993 struct cleanup
*back_to
;
1003 CORE_ADDR sym_value
;
1006 /* Check that the symbol file has dynamic symbols that we know about.
1007 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1008 on a sun4 host (and vice versa) and bfd is not configured
1009 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1010 so we ignore the dynamic symbols in this case. */
1011 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1012 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1013 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1016 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1017 if (dynsym_size
< 0)
1020 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1021 back_to
= make_cleanup (xfree
, dynsyms
);
1023 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1024 if (dynsym_count
< 0)
1026 do_cleanups (back_to
);
1030 /* Enter dynamic symbols into the minimal symbol table
1031 if this is a stripped executable. */
1032 if (bfd_get_symcount (abfd
) <= 0)
1035 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1037 asymbol
*sym
= *symptr
;
1041 sec
= bfd_get_section (sym
);
1043 /* BFD symbols are section relative. */
1044 sym_value
= sym
->value
+ sec
->vma
;
1046 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1048 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1049 SECT_OFF_TEXT (objfile
));
1052 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1054 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1055 SECT_OFF_DATA (objfile
));
1058 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1060 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1061 SECT_OFF_BSS (objfile
));
1067 if (sym
->flags
& BSF_GLOBAL
)
1070 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1075 /* Symbols from shared libraries have a dynamic relocation entry
1076 that points to the associated slot in the procedure linkage table.
1077 We make a mininal symbol table entry with type mst_solib_trampoline
1078 at the address in the procedure linkage table. */
1079 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1080 if (dynrel_size
< 0)
1082 do_cleanups (back_to
);
1086 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1087 make_cleanup (xfree
, dynrels
);
1089 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1090 if (dynrel_count
< 0)
1092 do_cleanups (back_to
);
1096 for (counter
= 0, relptr
= dynrels
;
1097 counter
< dynrel_count
;
1098 counter
++, relptr
++)
1100 arelent
*rel
= *relptr
;
1102 rel
->address
+ ANOFFSET (objfile
->section_offsets
,
1103 SECT_OFF_DATA (objfile
));
1105 switch (bfd_get_arch (abfd
))
1107 case bfd_arch_sparc
:
1108 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1112 /* `16' is the type BFD produces for a jump table relocation. */
1113 if (rel
->howto
->type
!= 16)
1116 /* Adjust address in the jump table to point to
1117 the start of the bsr instruction. */
1124 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1125 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1129 do_cleanups (back_to
);
1133 find_stab_function_addr (char *namestring
, const char *filename
,
1134 struct objfile
*objfile
)
1136 struct minimal_symbol
*msym
;
1140 p
= strchr (namestring
, ':');
1145 strncpy (p
, namestring
, n
);
1148 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1151 /* Sun Fortran appends an underscore to the minimal symbol name,
1152 try again with an appended underscore if the minimal symbol
1156 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1159 if (msym
== NULL
&& filename
!= NULL
)
1161 /* Try again without the filename. */
1163 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1165 if (msym
== NULL
&& filename
!= NULL
)
1167 /* And try again for Sun Fortran, but without the filename. */
1170 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1173 return msym
== NULL
? 0 : SYMBOL_VALUE_ADDRESS (msym
);
1177 function_outside_compilation_unit_complaint (const char *arg1
)
1179 complaint (&symfile_complaints
,
1180 _("function `%s' appears to be defined "
1181 "outside of all compilation units"),
1185 /* Setup partial_symtab's describing each source file for which
1186 debugging information is available. */
1189 read_dbx_symtab (struct objfile
*objfile
)
1191 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1192 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
1193 struct internal_nlist nlist
;
1194 CORE_ADDR text_addr
;
1201 int past_first_source_file
= 0;
1202 CORE_ADDR last_o_file_start
= 0;
1203 CORE_ADDR last_function_start
= 0;
1204 struct cleanup
*back_to
;
1206 int textlow_not_set
;
1207 int data_sect_index
;
1209 /* Current partial symtab. */
1210 struct partial_symtab
*pst
;
1212 /* List of current psymtab's include files. */
1213 char **psymtab_include_list
;
1214 int includes_allocated
;
1217 /* Index within current psymtab dependency list. */
1218 struct partial_symtab
**dependency_list
;
1219 int dependencies_used
, dependencies_allocated
;
1221 text_addr
= DBX_TEXT_ADDR (objfile
);
1222 text_size
= DBX_TEXT_SIZE (objfile
);
1224 /* FIXME. We probably want to change stringtab_global rather than add this
1225 while processing every symbol entry. FIXME. */
1226 file_string_table_offset
= 0;
1227 next_file_string_table_offset
= 0;
1229 stringtab_global
= DBX_STRINGTAB (objfile
);
1231 pst
= (struct partial_symtab
*) 0;
1233 includes_allocated
= 30;
1235 psymtab_include_list
= (char **) alloca (includes_allocated
*
1238 dependencies_allocated
= 30;
1239 dependencies_used
= 0;
1241 (struct partial_symtab
**) alloca (dependencies_allocated
*
1242 sizeof (struct partial_symtab
*));
1244 /* Init bincl list */
1245 init_bincl_list (20, objfile
);
1246 back_to
= make_cleanup_free_bincl_list (objfile
);
1248 last_source_file
= NULL
;
1250 lowest_text_address
= (CORE_ADDR
) -1;
1252 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1253 abfd
= objfile
->obfd
;
1254 symbuf_end
= symbuf_idx
= 0;
1255 next_symbol_text_func
= dbx_next_symbol_text
;
1256 textlow_not_set
= 1;
1257 has_line_numbers
= 0;
1259 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1260 to global and static variables. The stab for a global or static
1261 variable doesn't give us any indication of which section it's in,
1262 so we can't tell immediately which offset in
1263 objfile->section_offsets we should apply to the variable's
1266 We could certainly find out which section contains the variable
1267 by looking up the variable's unrelocated address with
1268 find_pc_section, but that would be expensive; this is the
1269 function that constructs the partial symbol tables by examining
1270 every symbol in the entire executable, and it's
1271 performance-critical. So that expense would not be welcome. I'm
1272 not sure what to do about this at the moment.
1274 What we have done for years is to simply assume that the .data
1275 section's offset is appropriate for all global and static
1276 variables. Recently, this was expanded to fall back to the .bss
1277 section's offset if there is no .data section, and then to the
1278 .rodata section's offset. */
1279 data_sect_index
= objfile
->sect_index_data
;
1280 if (data_sect_index
== -1)
1281 data_sect_index
= SECT_OFF_BSS (objfile
);
1282 if (data_sect_index
== -1)
1283 data_sect_index
= SECT_OFF_RODATA (objfile
);
1285 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1286 for the file to have no .data, no .bss, and no .text at all, if
1287 it also has no global or static variables. If it does, we will
1288 get an internal error from an ANOFFSET macro below when we try to
1289 use data_sect_index. */
1291 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1293 /* Get the symbol for this run and pull out some info. */
1294 QUIT
; /* Allow this to be interruptable. */
1295 if (symbuf_idx
== symbuf_end
)
1297 bufp
= &symbuf
[symbuf_idx
++];
1300 * Special case to speed up readin.
1302 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1304 has_line_numbers
= 1;
1308 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1309 OBJSTAT (objfile
, n_stabs
++);
1311 /* Ok. There is a lot of code duplicated in the rest of this
1312 switch statement (for efficiency reasons). Since I don't
1313 like duplicating code, I will do my penance here, and
1314 describe the code which is duplicated:
1316 *) The assignment to namestring.
1317 *) The call to strchr.
1318 *) The addition of a partial symbol the two partial
1319 symbol lists. This last is a large section of code, so
1320 I've imbedded it in the following macro. */
1322 switch (nlist
.n_type
)
1325 * Standard, external, non-debugger, symbols
1328 case N_TEXT
| N_EXT
:
1329 case N_NBTEXT
| N_EXT
:
1330 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1331 SECT_OFF_TEXT (objfile
));
1334 case N_DATA
| N_EXT
:
1335 case N_NBDATA
| N_EXT
:
1336 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1337 SECT_OFF_DATA (objfile
));
1342 case N_NBBSS
| N_EXT
:
1343 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1344 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1345 SECT_OFF_BSS (objfile
));
1350 namestring
= set_namestring (objfile
, &nlist
);
1353 record_minimal_symbol (namestring
, nlist
.n_value
,
1354 nlist
.n_type
, objfile
); /* Always */
1357 /* Standard, local, non-debugger, symbols. */
1361 /* We need to be able to deal with both N_FN or N_TEXT,
1362 because we have no way of knowing whether the sys-supplied ld
1363 or GNU ld was used to make the executable. Sequents throw
1364 in another wrinkle -- they renumbered N_FN. */
1369 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1370 SECT_OFF_TEXT (objfile
));
1371 namestring
= set_namestring (objfile
, &nlist
);
1373 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1374 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1375 && namestring
[nsl
- 2] == '.'))
1377 if (past_first_source_file
&& pst
1378 /* The gould NP1 uses low values for .o and -l symbols
1379 which are not the address. */
1380 && nlist
.n_value
>= pst
->textlow
)
1382 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1383 symnum
* symbol_size
,
1384 nlist
.n_value
> pst
->texthigh
1385 ? nlist
.n_value
: pst
->texthigh
,
1386 dependency_list
, dependencies_used
,
1388 pst
= (struct partial_symtab
*) 0;
1390 dependencies_used
= 0;
1391 has_line_numbers
= 0;
1394 past_first_source_file
= 1;
1395 last_o_file_start
= nlist
.n_value
;
1402 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1403 SECT_OFF_DATA (objfile
));
1406 case N_UNDF
| N_EXT
:
1407 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1408 We used to rely on the target to tell us whether it knows
1409 where the symbol has been relocated to, but none of the
1410 target implementations actually provided that operation.
1411 So we just ignore the symbol, the same way we would do if
1412 we had a target-side symbol lookup which returned no match.
1414 All other symbols (with nlist.n_value == 0), are really
1415 undefined, and so we ignore them too. */
1419 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1421 /* Deal with relative offsets in the string table
1422 used in ELF+STAB under Solaris. If we want to use the
1423 n_strx field, which contains the name of the file,
1424 we must adjust file_string_table_offset *before* calling
1425 set_namestring(). */
1426 past_first_source_file
= 1;
1427 file_string_table_offset
= next_file_string_table_offset
;
1428 next_file_string_table_offset
=
1429 file_string_table_offset
+ nlist
.n_value
;
1430 if (next_file_string_table_offset
< file_string_table_offset
)
1431 error (_("string table offset backs up at %d"), symnum
);
1432 /* FIXME -- replace error() with complaint. */
1437 /* Lots of symbol types we can just ignore. */
1444 /* Keep going . . . */
1447 * Special symbol types for GNU
1450 case N_INDR
| N_EXT
:
1452 case N_SETA
| N_EXT
:
1454 case N_SETT
| N_EXT
:
1456 case N_SETD
| N_EXT
:
1458 case N_SETB
| N_EXT
:
1469 static int prev_so_symnum
= -10;
1470 static int first_so_symnum
;
1472 static char *dirname_nso
;
1473 int prev_textlow_not_set
;
1475 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1476 SECT_OFF_TEXT (objfile
));
1478 prev_textlow_not_set
= textlow_not_set
;
1480 /* A zero value is probably an indication for the SunPRO 3.0
1481 compiler. end_psymtab explicitly tests for zero, so
1482 don't relocate it. */
1484 if (nlist
.n_value
== 0
1485 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1487 textlow_not_set
= 1;
1491 textlow_not_set
= 0;
1493 past_first_source_file
= 1;
1495 if (prev_so_symnum
!= symnum
- 1)
1496 { /* Here if prev stab wasn't N_SO. */
1497 first_so_symnum
= symnum
;
1501 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1502 symnum
* symbol_size
,
1503 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1504 dependency_list
, dependencies_used
,
1505 prev_textlow_not_set
);
1506 pst
= (struct partial_symtab
*) 0;
1508 dependencies_used
= 0;
1509 has_line_numbers
= 0;
1513 prev_so_symnum
= symnum
;
1515 /* End the current partial symtab and start a new one. */
1517 namestring
= set_namestring (objfile
, &nlist
);
1519 /* Null name means end of .o file. Don't start a new one. */
1520 if (*namestring
== '\000')
1523 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1524 The first one is a directory name; the second the file name.
1525 If pst exists, is empty, and has a filename ending in '/',
1526 we assume the previous N_SO was a directory name. */
1528 p
= lbasename (namestring
);
1529 if (p
!= namestring
&& *p
== '\000')
1531 /* Save the directory name SOs locally, then save it into
1532 the psymtab when it's created below. */
1533 dirname_nso
= namestring
;
1537 /* Some other compilers (C++ ones in particular) emit useless
1538 SOs for non-existant .c files. We ignore all subsequent SOs
1539 that immediately follow the first. */
1543 pst
= start_psymtab (objfile
,
1545 first_so_symnum
* symbol_size
,
1546 objfile
->global_psymbols
.next
,
1547 objfile
->static_psymbols
.next
);
1548 pst
->dirname
= dirname_nso
;
1556 enum language tmp_language
;
1558 /* Add this bincl to the bincl_list for future EXCLs. No
1559 need to save the string; it'll be around until
1560 read_dbx_symtab function returns. */
1562 namestring
= set_namestring (objfile
, &nlist
);
1563 tmp_language
= deduce_language_from_filename (namestring
);
1565 /* Only change the psymtab's language if we've learned
1566 something useful (eg. tmp_language is not language_unknown).
1567 In addition, to match what start_subfile does, never change
1569 if (tmp_language
!= language_unknown
1570 && (tmp_language
!= language_c
1571 || psymtab_language
!= language_cplus
))
1572 psymtab_language
= tmp_language
;
1576 /* FIXME: we should not get here without a PST to work on.
1577 Attempt to recover. */
1578 complaint (&symfile_complaints
,
1579 _("N_BINCL %s not in entries for "
1580 "any file, at symtab pos %d"),
1581 namestring
, symnum
);
1584 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1586 /* Mark down an include file in the current psymtab. */
1588 goto record_include_file
;
1593 enum language tmp_language
;
1595 /* Mark down an include file in the current psymtab. */
1596 namestring
= set_namestring (objfile
, &nlist
);
1597 tmp_language
= deduce_language_from_filename (namestring
);
1599 /* Only change the psymtab's language if we've learned
1600 something useful (eg. tmp_language is not language_unknown).
1601 In addition, to match what start_subfile does, never change
1603 if (tmp_language
!= language_unknown
1604 && (tmp_language
!= language_c
1605 || psymtab_language
!= language_cplus
))
1606 psymtab_language
= tmp_language
;
1608 /* In C++, one may expect the same filename to come round many
1609 times, when code is coming alternately from the main file
1610 and from inline functions in other files. So I check to see
1611 if this is a file we've seen before -- either the main
1612 source file, or a previously included file.
1614 This seems to be a lot of time to be spending on N_SOL, but
1615 things like "break c-exp.y:435" need to work (I
1616 suppose the psymtab_include_list could be hashed or put
1617 in a binary tree, if profiling shows this is a major hog). */
1618 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
1623 for (i
= 0; i
< includes_used
; i
++)
1624 if (filename_cmp (namestring
, psymtab_include_list
[i
]) == 0)
1633 record_include_file
:
1635 psymtab_include_list
[includes_used
++] = namestring
;
1636 if (includes_used
>= includes_allocated
)
1638 char **orig
= psymtab_include_list
;
1640 psymtab_include_list
= (char **)
1641 alloca ((includes_allocated
*= 2) * sizeof (char *));
1642 memcpy (psymtab_include_list
, orig
,
1643 includes_used
* sizeof (char *));
1647 case N_LSYM
: /* Typedef or automatic variable. */
1648 case N_STSYM
: /* Data seg var -- static. */
1649 case N_LCSYM
: /* BSS " */
1650 case N_ROSYM
: /* Read-only data seg var -- static. */
1651 case N_NBSTS
: /* Gould nobase. */
1652 case N_NBLCS
: /* symbols. */
1654 case N_GSYM
: /* Global (extern) variable; can be
1655 data or bss (sigh FIXME). */
1657 /* Following may probably be ignored; I'll leave them here
1658 for now (until I do Pascal and Modula 2 extensions). */
1660 case N_PC
: /* I may or may not need this; I
1662 case N_M2C
: /* I suspect that I can ignore this here. */
1663 case N_SCOPE
: /* Same. */
1667 namestring
= set_namestring (objfile
, &nlist
);
1669 /* See if this is an end of function stab. */
1670 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1674 /* It's value is the size (in bytes) of the function for
1675 function relative stabs, or the address of the function's
1676 end for old style stabs. */
1677 valu
= nlist
.n_value
+ last_function_start
;
1678 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1679 pst
->texthigh
= valu
;
1683 p
= (char *) strchr (namestring
, ':');
1685 continue; /* Not a debugging symbol. */
1688 sym_name
= NULL
; /* pacify "gcc -Werror" */
1689 if (psymtab_language
== language_cplus
)
1691 char *new_name
, *name
= xmalloc (p
- namestring
+ 1);
1692 memcpy (name
, namestring
, p
- namestring
);
1694 name
[p
- namestring
] = '\0';
1695 new_name
= cp_canonicalize_string (name
);
1696 if (new_name
!= NULL
)
1698 sym_len
= strlen (new_name
);
1699 sym_name
= obsavestring (new_name
, sym_len
,
1700 &objfile
->objfile_obstack
);
1708 sym_name
= namestring
;
1709 sym_len
= p
- namestring
;
1712 /* Main processing section for debugging symbols which
1713 the initial read through the symbol tables needs to worry
1714 about. If we reach this point, the symbol which we are
1715 considering is definitely one we are interested in.
1716 p must also contain the (valid) index into the namestring
1717 which indicates the debugging type symbol. */
1722 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1725 if (gdbarch_static_transform_name_p (gdbarch
))
1726 gdbarch_static_transform_name (gdbarch
, namestring
);
1728 add_psymbol_to_list (sym_name
, sym_len
, 1,
1729 VAR_DOMAIN
, LOC_STATIC
,
1730 &objfile
->static_psymbols
,
1732 psymtab_language
, objfile
);
1736 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1738 /* The addresses in these entries are reported to be
1739 wrong. See the code that reads 'G's for symtabs. */
1740 add_psymbol_to_list (sym_name
, sym_len
, 1,
1741 VAR_DOMAIN
, LOC_STATIC
,
1742 &objfile
->global_psymbols
,
1744 psymtab_language
, objfile
);
1748 /* When a 'T' entry is defining an anonymous enum, it
1749 may have a name which is the empty string, or a
1750 single space. Since they're not really defining a
1751 symbol, those shouldn't go in the partial symbol
1752 table. We do pick up the elements of such enums at
1753 'check_enum:', below. */
1754 if (p
>= namestring
+ 2
1755 || (p
== namestring
+ 1
1756 && namestring
[0] != ' '))
1758 add_psymbol_to_list (sym_name
, sym_len
, 1,
1759 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1760 &objfile
->static_psymbols
,
1762 psymtab_language
, objfile
);
1765 /* Also a typedef with the same name. */
1766 add_psymbol_to_list (sym_name
, sym_len
, 1,
1767 VAR_DOMAIN
, LOC_TYPEDEF
,
1768 &objfile
->static_psymbols
,
1770 psymtab_language
, objfile
);
1777 if (p
!= namestring
) /* a name is there, not just :T... */
1779 add_psymbol_to_list (sym_name
, sym_len
, 1,
1780 VAR_DOMAIN
, LOC_TYPEDEF
,
1781 &objfile
->static_psymbols
,
1783 psymtab_language
, objfile
);
1786 /* If this is an enumerated type, we need to
1787 add all the enum constants to the partial symbol
1788 table. This does not cover enums without names, e.g.
1789 "enum {a, b} c;" in C, but fortunately those are
1790 rare. There is no way for GDB to find those from the
1791 enum type without spending too much time on it. Thus
1792 to solve this problem, the compiler needs to put out the
1793 enum in a nameless type. GCC2 does this. */
1795 /* We are looking for something of the form
1796 <name> ":" ("t" | "T") [<number> "="] "e"
1797 {<constant> ":" <value> ","} ";". */
1799 /* Skip over the colon and the 't' or 'T'. */
1801 /* This type may be given a number. Also, numbers can come
1802 in pairs like (0,26). Skip over it. */
1803 while ((*p
>= '0' && *p
<= '9')
1804 || *p
== '(' || *p
== ',' || *p
== ')'
1810 /* The aix4 compiler emits extra crud before the members. */
1813 /* Skip over the type (?). */
1817 /* Skip over the colon. */
1821 /* We have found an enumerated type. */
1822 /* According to comments in read_enum_type
1823 a comma could end it instead of a semicolon.
1824 I don't know where that happens.
1826 while (*p
&& *p
!= ';' && *p
!= ',')
1830 /* Check for and handle cretinous dbx symbol name
1832 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1833 p
= next_symbol_text (objfile
);
1835 /* Point to the character after the name
1836 of the enum constant. */
1837 for (q
= p
; *q
&& *q
!= ':'; q
++)
1839 /* Note that the value doesn't matter for
1840 enum constants in psymtabs, just in symtabs. */
1841 add_psymbol_to_list (p
, q
- p
, 1,
1842 VAR_DOMAIN
, LOC_CONST
,
1843 &objfile
->static_psymbols
, 0,
1844 0, psymtab_language
, objfile
);
1845 /* Point past the name. */
1847 /* Skip over the value. */
1848 while (*p
&& *p
!= ',')
1850 /* Advance past the comma. */
1858 /* Constant, e.g. from "const" in Pascal. */
1859 add_psymbol_to_list (sym_name
, sym_len
, 1,
1860 VAR_DOMAIN
, LOC_CONST
,
1861 &objfile
->static_psymbols
, nlist
.n_value
,
1862 0, psymtab_language
, objfile
);
1868 int name_len
= p
- namestring
;
1869 char *name
= xmalloc (name_len
+ 1);
1871 memcpy (name
, namestring
, name_len
);
1872 name
[name_len
] = '\0';
1873 function_outside_compilation_unit_complaint (name
);
1876 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1877 SECT_OFF_TEXT (objfile
));
1878 /* Kludges for ELF/STABS with Sun ACC. */
1879 last_function_name
= namestring
;
1880 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1881 value for the bottom of the text seg in those cases. */
1882 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1883 SECT_OFF_TEXT (objfile
))
1884 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1886 CORE_ADDR minsym_valu
=
1887 find_stab_function_addr (namestring
,
1888 pst
? pst
->filename
: NULL
,
1891 /* find_stab_function_addr will return 0 if the minimal
1892 symbol wasn't found. (Unfortunately, this might also
1893 be a valid address.) Anyway, if it *does* return 0,
1894 it is likely that the value was set correctly to begin
1896 if (minsym_valu
!= 0)
1897 nlist
.n_value
= minsym_valu
;
1899 if (pst
&& textlow_not_set
1900 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1902 pst
->textlow
= nlist
.n_value
;
1903 textlow_not_set
= 0;
1907 /* Keep track of the start of the last function so we
1908 can handle end of function symbols. */
1909 last_function_start
= nlist
.n_value
;
1911 /* In reordered executables this function may lie outside
1912 the bounds created by N_SO symbols. If that's the case
1913 use the address of this function as the low bound for
1914 the partial symbol table. */
1917 || (nlist
.n_value
< pst
->textlow
1919 != ANOFFSET (objfile
->section_offsets
,
1920 SECT_OFF_TEXT (objfile
))))))
1922 pst
->textlow
= nlist
.n_value
;
1923 textlow_not_set
= 0;
1925 add_psymbol_to_list (sym_name
, sym_len
, 1,
1926 VAR_DOMAIN
, LOC_BLOCK
,
1927 &objfile
->static_psymbols
,
1929 psymtab_language
, objfile
);
1932 /* Global functions were ignored here, but now they
1933 are put into the global psymtab like one would expect.
1934 They're also in the minimal symbol table. */
1938 int name_len
= p
- namestring
;
1939 char *name
= xmalloc (name_len
+ 1);
1941 memcpy (name
, namestring
, name_len
);
1942 name
[name_len
] = '\0';
1943 function_outside_compilation_unit_complaint (name
);
1946 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1947 SECT_OFF_TEXT (objfile
));
1948 /* Kludges for ELF/STABS with Sun ACC. */
1949 last_function_name
= namestring
;
1950 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1951 value for the bottom of the text seg in those cases. */
1952 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1953 SECT_OFF_TEXT (objfile
))
1954 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1956 CORE_ADDR minsym_valu
=
1957 find_stab_function_addr (namestring
,
1958 pst
? pst
->filename
: NULL
,
1961 /* find_stab_function_addr will return 0 if the minimal
1962 symbol wasn't found. (Unfortunately, this might also
1963 be a valid address.) Anyway, if it *does* return 0,
1964 it is likely that the value was set correctly to begin
1966 if (minsym_valu
!= 0)
1967 nlist
.n_value
= minsym_valu
;
1969 if (pst
&& textlow_not_set
1970 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1972 pst
->textlow
= nlist
.n_value
;
1973 textlow_not_set
= 0;
1977 /* Keep track of the start of the last function so we
1978 can handle end of function symbols. */
1979 last_function_start
= nlist
.n_value
;
1981 /* In reordered executables this function may lie outside
1982 the bounds created by N_SO symbols. If that's the case
1983 use the address of this function as the low bound for
1984 the partial symbol table. */
1987 || (nlist
.n_value
< pst
->textlow
1989 != ANOFFSET (objfile
->section_offsets
,
1990 SECT_OFF_TEXT (objfile
))))))
1992 pst
->textlow
= nlist
.n_value
;
1993 textlow_not_set
= 0;
1995 add_psymbol_to_list (sym_name
, sym_len
, 1,
1996 VAR_DOMAIN
, LOC_BLOCK
,
1997 &objfile
->global_psymbols
,
1999 psymtab_language
, objfile
);
2002 /* Two things show up here (hopefully); static symbols of
2003 local scope (static used inside braces) or extensions
2004 of structure symbols. We can ignore both. */
2018 case '#': /* For symbol identification (used in live ranges). */
2022 /* It is a C++ nested symbol. We don't need to record it
2023 (I don't think); if we try to look up foo::bar::baz,
2024 then symbols for the symtab containing foo should get
2025 read in, I think. */
2026 /* Someone says sun cc puts out symbols like
2027 /foo/baz/maclib::/usr/local/bin/maclib,
2028 which would get here with a symbol type of ':'. */
2032 /* Unexpected symbol descriptor. The second and subsequent stabs
2033 of a continued stab can show up here. The question is
2034 whether they ever can mimic a normal stab--it would be
2035 nice if not, since we certainly don't want to spend the
2036 time searching to the end of every string looking for
2039 complaint (&symfile_complaints
,
2040 _("unknown symbol descriptor `%c'"),
2043 /* Ignore it; perhaps it is an extension that we don't
2051 namestring
= set_namestring (objfile
, &nlist
);
2053 /* Find the corresponding bincl and mark that psymtab on the
2054 psymtab dependency list. */
2056 struct partial_symtab
*needed_pst
=
2057 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2059 /* If this include file was defined earlier in this file,
2061 if (needed_pst
== pst
)
2069 for (i
= 0; i
< dependencies_used
; i
++)
2070 if (dependency_list
[i
] == needed_pst
)
2076 /* If it's already in the list, skip the rest. */
2080 dependency_list
[dependencies_used
++] = needed_pst
;
2081 if (dependencies_used
>= dependencies_allocated
)
2083 struct partial_symtab
**orig
= dependency_list
;
2086 (struct partial_symtab
**)
2087 alloca ((dependencies_allocated
*= 2)
2088 * sizeof (struct partial_symtab
*));
2089 memcpy (dependency_list
, orig
,
2091 * sizeof (struct partial_symtab
*)));
2093 fprintf_unfiltered (gdb_stderr
,
2094 "Had to reallocate "
2095 "dependency list.\n");
2096 fprintf_unfiltered (gdb_stderr
,
2097 "New dependencies allocated: %d\n",
2098 dependencies_allocated
);
2106 /* Solaris 2 end of module, finish current partial symbol table.
2107 end_psymtab will set pst->texthigh to the proper value, which
2108 is necessary if a module compiled without debugging info
2109 follows this module. */
2110 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
2112 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2113 symnum
* symbol_size
,
2114 (CORE_ADDR
) 0, dependency_list
,
2115 dependencies_used
, textlow_not_set
);
2116 pst
= (struct partial_symtab
*) 0;
2118 dependencies_used
= 0;
2119 has_line_numbers
= 0;
2125 HANDLE_RBRAC (nlist
.n_value
);
2131 case N_SSYM
: /* Claim: Structure or union element.
2132 Hopefully, I can ignore this. */
2133 case N_ENTRY
: /* Alternate entry point; can ignore. */
2134 case N_MAIN
: /* Can definitely ignore this. */
2135 case N_CATCH
: /* These are GNU C++ extensions */
2136 case N_EHDECL
: /* that can safely be ignored here. */
2146 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2147 case N_DEFD
: /* GNU Modula-2 */
2148 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2150 case N_OBJ
: /* Useless types from Solaris. */
2153 /* These symbols aren't interesting; don't worry about them. */
2157 /* If we haven't found it yet, ignore it. It's probably some
2158 new type we don't know about yet. */
2159 unknown_symtype_complaint (hex_string (nlist
.n_type
));
2164 /* If there's stuff to be cleaned up, clean it up. */
2167 /* Don't set pst->texthigh lower than it already is. */
2168 CORE_ADDR text_end
=
2169 (lowest_text_address
== (CORE_ADDR
) -1
2170 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
2171 SECT_OFF_TEXT (objfile
)))
2172 : lowest_text_address
)
2175 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2176 symnum
* symbol_size
,
2177 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2178 dependency_list
, dependencies_used
, textlow_not_set
);
2181 do_cleanups (back_to
);
2184 /* Allocate and partially fill a partial symtab. It will be
2185 completely filled at the end of the symbol list.
2187 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2188 is the address relative to which its symbols are (incremental) or 0
2191 static struct partial_symtab
*
2192 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2193 int ldsymoff
, struct partial_symbol
**global_syms
,
2194 struct partial_symbol
**static_syms
)
2196 struct partial_symtab
*result
=
2197 start_psymtab_common (objfile
, objfile
->section_offsets
,
2198 filename
, textlow
, global_syms
, static_syms
);
2200 result
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2201 sizeof (struct symloc
));
2202 LDSYMOFF (result
) = ldsymoff
;
2203 result
->read_symtab
= dbx_psymtab_to_symtab
;
2204 SYMBOL_SIZE (result
) = symbol_size
;
2205 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2206 STRING_OFFSET (result
) = string_table_offset
;
2207 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2210 /* If we're handling an ELF file, drag some section-relocation info
2211 for this source file out of the ELF symbol table, to compensate for
2212 Sun brain death. This replaces the section_offsets in this psymtab,
2214 elfstab_offset_sections (objfile
, result
);
2217 /* Deduce the source language from the filename for this psymtab. */
2218 psymtab_language
= deduce_language_from_filename (filename
);
2223 /* Close off the current usage of PST.
2224 Returns PST or NULL if the partial symtab was empty and thrown away.
2226 FIXME: List variables and peculiarities of same. */
2228 struct partial_symtab
*
2229 end_psymtab (struct partial_symtab
*pst
, char **include_list
, int num_includes
,
2230 int capping_symbol_offset
, CORE_ADDR capping_text
,
2231 struct partial_symtab
**dependency_list
, int number_dependencies
,
2232 int textlow_not_set
)
2235 struct objfile
*objfile
= pst
->objfile
;
2236 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2238 if (capping_symbol_offset
!= -1)
2239 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2240 pst
->texthigh
= capping_text
;
2242 /* Under Solaris, the N_SO symbols always have a value of 0,
2243 instead of the usual address of the .o file. Therefore,
2244 we have to do some tricks to fill in texthigh and textlow.
2245 The first trick is: if we see a static
2246 or global function, and the textlow for the current pst
2247 is not set (ie: textlow_not_set), then we use that function's
2248 address for the textlow of the pst. */
2250 /* Now, to fill in texthigh, we remember the last function seen
2251 in the .o file. Also, there's a hack in
2252 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2253 to here via the misc_info field. Therefore, we can fill in
2254 a reliable texthigh by taking the address plus size of the
2255 last function in the file. */
2257 if (pst
->texthigh
== 0 && last_function_name
2258 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2262 struct minimal_symbol
*minsym
;
2264 p
= strchr (last_function_name
, ':');
2266 p
= last_function_name
;
2267 n
= p
- last_function_name
;
2269 strncpy (p
, last_function_name
, n
);
2272 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2275 /* Sun Fortran appends an underscore to the minimal symbol name,
2276 try again with an appended underscore if the minimal symbol
2280 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2284 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
2286 last_function_name
= NULL
;
2289 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2291 /* This test will be true if the last .o file is only data. */
2292 else if (textlow_not_set
)
2293 pst
->textlow
= pst
->texthigh
;
2296 struct partial_symtab
*p1
;
2298 /* If we know our own starting text address, then walk through all other
2299 psymtabs for this objfile, and if any didn't know their ending text
2300 address, set it to our starting address. Take care to not set our
2301 own ending address to our starting address, nor to set addresses on
2302 `dependency' files that have both textlow and texthigh zero. */
2304 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2306 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2308 p1
->texthigh
= pst
->textlow
;
2309 /* If this file has only data, then make textlow match
2311 if (p1
->textlow
== 0)
2312 p1
->textlow
= p1
->texthigh
;
2317 /* End of kludge for patching Solaris textlow and texthigh. */
2319 pst
->n_global_syms
=
2320 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
2321 + pst
->globals_offset
);
2322 pst
->n_static_syms
=
2323 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
2324 + pst
->statics_offset
);
2326 pst
->number_of_dependencies
= number_dependencies
;
2327 if (number_dependencies
)
2329 pst
->dependencies
= (struct partial_symtab
**)
2330 obstack_alloc (&objfile
->objfile_obstack
,
2331 number_dependencies
* sizeof (struct partial_symtab
*));
2332 memcpy (pst
->dependencies
, dependency_list
,
2333 number_dependencies
* sizeof (struct partial_symtab
*));
2336 pst
->dependencies
= 0;
2338 for (i
= 0; i
< num_includes
; i
++)
2340 struct partial_symtab
*subpst
=
2341 allocate_psymtab (include_list
[i
], objfile
);
2343 /* Copy the sesction_offsets array from the main psymtab. */
2344 subpst
->section_offsets
= pst
->section_offsets
;
2345 subpst
->read_symtab_private
=
2346 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
2350 subpst
->texthigh
= 0;
2352 /* We could save slight bits of space by only making one of these,
2353 shared by the entire set of include files. FIXME-someday. */
2354 subpst
->dependencies
= (struct partial_symtab
**)
2355 obstack_alloc (&objfile
->objfile_obstack
,
2356 sizeof (struct partial_symtab
*));
2357 subpst
->dependencies
[0] = pst
;
2358 subpst
->number_of_dependencies
= 1;
2360 subpst
->globals_offset
=
2361 subpst
->n_global_syms
=
2362 subpst
->statics_offset
=
2363 subpst
->n_static_syms
= 0;
2367 subpst
->read_symtab
= pst
->read_symtab
;
2370 sort_pst_symbols (pst
);
2372 if (num_includes
== 0
2373 && number_dependencies
== 0
2374 && pst
->n_global_syms
== 0
2375 && pst
->n_static_syms
== 0
2376 && has_line_numbers
== 0)
2378 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2379 it is on the obstack, but we can forget to chain it on the list. */
2380 /* Empty psymtabs happen as a result of header files which don't have
2381 any symbols in them. There can be a lot of them. But this check
2382 is wrong, in that a psymtab with N_SLINE entries but nothing else
2383 is not empty, but we don't realize that. Fixing that without slowing
2384 things down might be tricky. */
2386 discard_psymtab (pst
);
2388 /* Indicate that psymtab was thrown away. */
2389 pst
= (struct partial_symtab
*) NULL
;
2395 dbx_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2397 struct cleanup
*old_chain
;
2405 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2406 "Shouldn't happen.\n",
2411 /* Read in all partial symtabs on which this one is dependent. */
2412 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2413 if (!pst
->dependencies
[i
]->readin
)
2415 /* Inform about additional files that need to be read in. */
2418 fputs_filtered (" ", gdb_stdout
);
2420 fputs_filtered ("and ", gdb_stdout
);
2422 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2423 wrap_here (""); /* Flush output. */
2424 gdb_flush (gdb_stdout
);
2426 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2429 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2431 /* Init stuff necessary for reading in symbols */
2434 old_chain
= make_cleanup (really_free_pendings
, 0);
2435 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2436 symbol_size
= SYMBOL_SIZE (pst
);
2438 /* Read in this file's symbols. */
2439 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2440 read_ofile_symtab (pst
);
2442 do_cleanups (old_chain
);
2448 /* Read in all of the symbols for a given psymtab for real.
2449 Be verbose about it if the user wants that. */
2452 dbx_psymtab_to_symtab (struct partial_symtab
*pst
)
2455 struct cleanup
*back_to
= NULL
;
2462 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2463 "Shouldn't happen.\n",
2468 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
2470 /* Print the message now, before reading the string table,
2471 to avoid disconcerting pauses. */
2474 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2475 gdb_flush (gdb_stdout
);
2478 sym_bfd
= pst
->objfile
->obfd
;
2480 next_symbol_text_func
= dbx_next_symbol_text
;
2482 if (DBX_STAB_SECTION (pst
->objfile
))
2485 = symfile_relocate_debug_section (pst
->objfile
,
2486 DBX_STAB_SECTION (pst
->objfile
),
2490 back_to
= make_cleanup (free_current_contents
,
2491 (void *) &stabs_data
);
2494 dbx_psymtab_to_symtab_1 (pst
);
2497 do_cleanups (back_to
);
2499 /* Match with global symbols. This only needs to be done once,
2500 after all of the symtabs and dependencies have been read in. */
2501 scan_file_globals (pst
->objfile
);
2503 /* Finish up the debug error message. */
2505 printf_filtered ("done.\n");
2509 /* Read in a defined section of a specific object file's symbols. */
2512 read_ofile_symtab (struct partial_symtab
*pst
)
2515 struct external_nlist
*bufp
;
2516 struct internal_nlist nlist
;
2518 unsigned max_symnum
;
2520 struct objfile
*objfile
;
2521 int sym_offset
; /* Offset to start of symbols to read */
2522 int sym_size
; /* Size of symbols to read */
2523 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2524 int text_size
; /* Size of text segment for symbols */
2525 struct section_offsets
*section_offsets
;
2527 objfile
= pst
->objfile
;
2528 sym_offset
= LDSYMOFF (pst
);
2529 sym_size
= LDSYMLEN (pst
);
2530 text_offset
= pst
->textlow
;
2531 text_size
= pst
->texthigh
- pst
->textlow
;
2532 /* This cannot be simply objfile->section_offsets because of
2533 elfstab_offset_sections() which initializes the psymtab section
2534 offsets information in a special way, and that is different from
2535 objfile->section_offsets. */
2536 section_offsets
= pst
->section_offsets
;
2538 dbxread_objfile
= objfile
;
2539 subfile_stack
= NULL
;
2541 stringtab_global
= DBX_STRINGTAB (objfile
);
2542 last_source_file
= NULL
;
2544 abfd
= objfile
->obfd
;
2545 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2546 symbuf_end
= symbuf_idx
= 0;
2548 symbuf_left
= sym_offset
+ sym_size
;
2550 /* It is necessary to actually read one symbol *before* the start
2551 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2552 occurs before the N_SO symbol.
2554 Detecting this in read_dbx_symtab
2555 would slow down initial readin, so we look for it here instead. */
2556 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2558 stabs_seek (sym_offset
- symbol_size
);
2560 bufp
= &symbuf
[symbuf_idx
++];
2561 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2562 OBJSTAT (objfile
, n_stabs
++);
2564 namestring
= set_namestring (objfile
, &nlist
);
2566 processing_gcc_compilation
= 0;
2567 if (nlist
.n_type
== N_TEXT
)
2569 const char *tempstring
= namestring
;
2571 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2572 processing_gcc_compilation
= 1;
2573 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2574 processing_gcc_compilation
= 2;
2575 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2577 if (strncmp (tempstring
, "__gnu_compiled", 14) == 0)
2578 processing_gcc_compilation
= 2;
2581 /* Try to select a C++ demangling based on the compilation unit
2585 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2586 know whether it will use the old style or v3 mangling. */
2587 if (processing_gcc_compilation
)
2589 if (AUTO_DEMANGLING
)
2591 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2598 /* The N_SO starting this symtab is the first symbol, so we
2599 better not check the symbol before it. I'm not this can
2600 happen, but it doesn't hurt to check for it. */
2601 stabs_seek (sym_offset
);
2602 processing_gcc_compilation
= 0;
2605 if (symbuf_idx
== symbuf_end
)
2607 bufp
= &symbuf
[symbuf_idx
];
2608 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2609 error (_("First symbol in segment of executable not a source symbol"));
2611 max_symnum
= sym_size
/ symbol_size
;
2614 symnum
< max_symnum
;
2617 QUIT
; /* Allow this to be interruptable. */
2618 if (symbuf_idx
== symbuf_end
)
2620 bufp
= &symbuf
[symbuf_idx
++];
2621 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2622 OBJSTAT (objfile
, n_stabs
++);
2624 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2626 namestring
= set_namestring (objfile
, &nlist
);
2630 if (sizeof (nlist
.n_value
) > 4
2631 /* We are a 64-bit debugger debugging a 32-bit program. */
2632 && (type
== N_LSYM
|| type
== N_PSYM
))
2633 /* We have to be careful with the n_value in the case of N_LSYM
2634 and N_PSYM entries, because they are signed offsets from frame
2635 pointer, but we actually read them as unsigned 32-bit values.
2636 This is not a problem for 32-bit debuggers, for which negative
2637 values end up being interpreted correctly (as negative
2638 offsets) due to integer overflow.
2639 But we need to sign-extend the value for 64-bit debuggers,
2640 or we'll end up interpreting negative values as very large
2641 positive offsets. */
2642 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2643 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2644 namestring
, section_offsets
, objfile
);
2646 /* We skip checking for a new .o or -l file; that should never
2647 happen in this routine. */
2648 else if (type
== N_TEXT
)
2650 /* I don't think this code will ever be executed, because
2651 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2652 the N_SO symbol which starts this source file.
2653 However, there is no reason not to accept
2654 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2656 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2657 processing_gcc_compilation
= 1;
2658 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2659 processing_gcc_compilation
= 2;
2662 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2663 know whether it will use the old style or v3 mangling. */
2664 if (AUTO_DEMANGLING
)
2666 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2670 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2671 || type
== (unsigned char) N_NBTEXT
)
2673 /* Global symbol: see if we came across a dbx defintion for
2674 a corresponding symbol. If so, store the value. Remove
2675 syms from the chain when their values are stored, but
2676 search the whole chain, as there may be several syms from
2677 different files with the same name. */
2678 /* This is probably not true. Since the files will be read
2679 in one at a time, each reference to a global symbol will
2680 be satisfied in each file as it appears. So we skip this
2686 /* In a Solaris elf file, this variable, which comes from the
2687 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2688 which comes from pst->textlow is correct. */
2689 if (last_source_start_addr
== 0)
2690 last_source_start_addr
= text_offset
;
2692 /* In reordered executables last_source_start_addr may not be the
2693 lower bound for this symtab, instead use text_offset which comes
2694 from pst->textlow which is correct. */
2695 if (last_source_start_addr
> text_offset
)
2696 last_source_start_addr
= text_offset
;
2698 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
,
2699 SECT_OFF_TEXT (objfile
));
2703 dbxread_objfile
= NULL
;
2707 /* This handles a single symbol from the symbol-file, building symbols
2708 into a GDB symtab. It takes these arguments and an implicit argument.
2710 TYPE is the type field of the ".stab" symbol entry.
2711 DESC is the desc field of the ".stab" entry.
2712 VALU is the value field of the ".stab" entry.
2713 NAME is the symbol name, in our address space.
2714 SECTION_OFFSETS is a set of amounts by which the sections of this
2715 object file were relocated when it was loaded into memory. Note
2716 that these section_offsets are not the objfile->section_offsets but
2717 the pst->section_offsets. All symbols that refer to memory
2718 locations need to be offset by these amounts.
2719 OBJFILE is the object file from which we are reading symbols. It
2720 is used in end_symtab. */
2723 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2724 struct section_offsets
*section_offsets
,
2725 struct objfile
*objfile
)
2727 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2728 struct context_stack
*new;
2729 /* This remembers the address of the start of a function. It is
2730 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2731 are relative to the current function's start address. On systems
2732 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2733 and is used to relocate these symbol types rather than
2735 static CORE_ADDR function_start_offset
;
2737 /* This holds the address of the start of a function, without the
2738 system peculiarities of function_start_offset. */
2739 static CORE_ADDR last_function_start
;
2741 /* If this is nonzero, we've seen an N_SLINE since the start of the
2742 current function. We use this to tell us to move the first sline
2743 to the beginning of the function regardless of what its given
2745 static int sline_found_in_function
= 1;
2747 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2748 source file. Used to detect the SunPRO solaris compiler. */
2749 static int n_opt_found
;
2751 /* The stab type used for the definition of the last function.
2752 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2753 static int function_stab_type
= 0;
2755 if (!block_address_function_relative
)
2757 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2758 function start address, so just use the text offset. */
2759 function_start_offset
=
2760 ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2763 /* Something is wrong if we see real data before seeing a source
2766 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
2768 /* Ignore any symbols which appear before an N_SO symbol.
2769 Currently no one puts symbols there, but we should deal
2770 gracefully with the case. A complain()t might be in order,
2771 but this should not be an error (). */
2780 if (*name
== '\000')
2782 /* This N_FUN marks the end of a function. This closes off
2783 the current block. */
2784 struct block
*block
;
2786 if (context_stack_depth
<= 0)
2788 lbrac_mismatch_complaint (symnum
);
2792 /* The following check is added before recording line 0 at
2793 end of function so as to handle hand-generated stabs
2794 which may have an N_FUN stabs at the end of the function,
2795 but no N_SLINE stabs. */
2796 if (sline_found_in_function
)
2798 CORE_ADDR addr
= last_function_start
+ valu
;
2800 record_line (current_subfile
, 0,
2801 gdbarch_addr_bits_remove (gdbarch
, addr
));
2804 within_function
= 0;
2805 new = pop_context ();
2807 /* Make a block for the local symbols within. */
2808 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
2809 new->start_addr
, new->start_addr
+ valu
,
2812 /* For C++, set the block's scope. */
2813 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
2814 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
2817 /* May be switching to an assembler file which may not be using
2818 block relative stabs, so reset the offset. */
2819 if (block_address_function_relative
)
2820 function_start_offset
= 0;
2825 sline_found_in_function
= 0;
2827 /* Relocate for dynamic loading. */
2828 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2829 valu
= gdbarch_smash_text_address (gdbarch
, valu
);
2830 last_function_start
= valu
;
2832 goto define_a_symbol
;
2835 /* This "symbol" just indicates the start of an inner lexical
2836 context within a function. */
2838 /* Ignore extra outermost context from SunPRO cc and acc. */
2839 if (n_opt_found
&& desc
== 1)
2842 if (block_address_function_relative
)
2843 /* Relocate for Sun ELF acc fn-relative syms. */
2844 valu
+= function_start_offset
;
2846 /* On most machines, the block addresses are relative to the
2847 N_SO, the linker did not relocate them (sigh). */
2848 valu
+= last_source_start_addr
;
2850 push_context (desc
, valu
);
2854 /* This "symbol" just indicates the end of an inner lexical
2855 context that was started with N_LBRAC. */
2857 /* Ignore extra outermost context from SunPRO cc and acc. */
2858 if (n_opt_found
&& desc
== 1)
2861 if (block_address_function_relative
)
2862 /* Relocate for Sun ELF acc fn-relative syms. */
2863 valu
+= function_start_offset
;
2865 /* On most machines, the block addresses are relative to the
2866 N_SO, the linker did not relocate them (sigh). */
2867 valu
+= last_source_start_addr
;
2869 if (context_stack_depth
<= 0)
2871 lbrac_mismatch_complaint (symnum
);
2875 new = pop_context ();
2876 if (desc
!= new->depth
)
2877 lbrac_mismatch_complaint (symnum
);
2879 if (local_symbols
!= NULL
)
2881 /* GCC development snapshots from March to December of
2882 2000 would output N_LSYM entries after N_LBRAC
2883 entries. As a consequence, these symbols are simply
2884 discarded. Complain if this is the case. */
2885 complaint (&symfile_complaints
,
2886 _("misplaced N_LBRAC entry; discarding local "
2887 "symbols which have no enclosing block"));
2889 local_symbols
= new->locals
;
2891 if (context_stack_depth
> 1)
2893 /* This is not the outermost LBRAC...RBRAC pair in the
2894 function, its local symbols preceded it, and are the ones
2895 just recovered from the context stack. Define the block
2896 for them (but don't bother if the block contains no
2897 symbols. Should we complain on blocks without symbols?
2898 I can't think of any useful purpose for them). */
2899 if (local_symbols
!= NULL
)
2901 /* Muzzle a compiler bug that makes end < start.
2903 ??? Which compilers? Is this ever harmful?. */
2904 if (new->start_addr
> valu
)
2906 complaint (&symfile_complaints
,
2907 _("block start larger than block end"));
2908 new->start_addr
= valu
;
2910 /* Make a block for the local symbols within. */
2911 finish_block (0, &local_symbols
, new->old_blocks
,
2912 new->start_addr
, valu
, objfile
);
2917 /* This is the outermost LBRAC...RBRAC pair. There is no
2918 need to do anything; leave the symbols that preceded it
2919 to be attached to the function's own block. We need to
2920 indicate that we just moved outside of the function. */
2921 within_function
= 0;
2928 /* This kind of symbol indicates the start of an object file.
2929 Relocate for dynamic loading. */
2930 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2934 /* This type of symbol indicates the start of data for one
2935 source file. Finish the symbol table of the previous source
2936 file (if any) and start accumulating a new symbol table.
2937 Relocate for dynamic loading. */
2938 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2942 if (last_source_file
)
2944 /* Check if previous symbol was also an N_SO (with some
2945 sanity checks). If so, that one was actually the
2946 directory name, and the current one is the real file
2947 name. Patch things up. */
2948 if (previous_stab_code
== (unsigned char) N_SO
)
2950 patch_subfile_names (current_subfile
, name
);
2951 break; /* Ignore repeated SOs. */
2953 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2957 /* Null name means this just marks the end of text for this .o
2958 file. Don't start a new symtab in this case. */
2959 if (*name
== '\000')
2962 if (block_address_function_relative
)
2963 function_start_offset
= 0;
2966 start_symtab (name
, NULL
, valu
);
2967 record_debugformat ("stabs");
2971 /* This type of symbol indicates the start of data for a
2972 sub-source-file, one whose contents were copied or included
2973 in the compilation of the main source file (whose name was
2974 given in the N_SO symbol). Relocate for dynamic loading. */
2975 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2976 start_subfile (name
, current_subfile
->dirname
);
2981 add_new_header_file (name
, valu
);
2982 start_subfile (name
, current_subfile
->dirname
);
2986 start_subfile (pop_subfile (), current_subfile
->dirname
);
2990 add_old_header_file (name
, valu
);
2994 /* This type of "symbol" really just records one line-number --
2995 core-address correspondence. Enter it in the line list for
2996 this symbol table. */
2998 /* Relocate for dynamic loading and for ELF acc
2999 function-relative symbols. */
3000 valu
+= function_start_offset
;
3002 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
3003 middle of the prologue instead of right at the start of the
3004 function. To deal with this we record the address for the
3005 first N_SLINE stab to be the start of the function instead of
3006 the listed location. We really shouldn't to this. When
3007 compiling with optimization, this first N_SLINE stab might be
3008 optimized away. Other (non-GCC) compilers don't emit this
3009 stab at all. There is no real harm in having an extra
3010 numbered line, although it can be a bit annoying for the
3011 user. However, it totally screws up our testsuite.
3013 So for now, keep adjusting the address of the first N_SLINE
3014 stab, but only for code compiled with GCC. */
3016 if (within_function
&& sline_found_in_function
== 0)
3018 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
3019 last_function_start
: valu
;
3021 record_line (current_subfile
, desc
,
3022 gdbarch_addr_bits_remove (gdbarch
, addr
));
3023 sline_found_in_function
= 1;
3026 record_line (current_subfile
, desc
,
3027 gdbarch_addr_bits_remove (gdbarch
, valu
));
3031 common_block_start (name
, objfile
);
3035 common_block_end (objfile
);
3038 /* The following symbol types need to have the appropriate
3039 offset added to their value; then we process symbol
3040 definitions in the name. */
3042 case N_STSYM
: /* Static symbol in data segment. */
3043 case N_LCSYM
: /* Static symbol in BSS segment. */
3044 case N_ROSYM
: /* Static symbol in read-only data segment. */
3045 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3046 Solaris 2's stabs-in-elf makes *most* symbols relative but
3047 leaves a few absolute (at least for Solaris 2.1 and version
3048 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3049 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3050 relocates it) .stab "foo:V...",N_STSYM is relative (section
3051 base subtracted). This leaves us no choice but to search for
3052 the 'S' or 'V'... (or pass the whole section_offsets stuff
3053 down ONE MORE function call level, which we really don't want
3058 /* Normal object file and NLMs have non-zero text seg offsets,
3059 but don't need their static syms offset in this fashion.
3060 XXX - This is really a crock that should be fixed in the
3061 solib handling code so that I don't have to work around it
3064 if (!symfile_relocatable
)
3066 p
= strchr (name
, ':');
3067 if (p
!= 0 && p
[1] == 'S')
3069 /* The linker relocated it. We don't want to add an
3070 elfstab_offset_sections-type offset, but we *do*
3071 want to add whatever solib.c passed to
3072 symbol_file_add as addr (this is known to affect
3073 SunOS 4, and I suspect ELF too). Since
3074 elfstab_offset_sections currently does not muck
3075 with the text offset (there is no Ttext.text
3076 symbol), we can get addr from the text offset. If
3077 elfstab_offset_sections ever starts dealing with
3078 the text offset, and we still need to do this, we
3079 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3080 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3081 goto define_a_symbol
;
3084 /* Since it's not the kludge case, re-dispatch to the right
3095 internal_error (__FILE__
, __LINE__
,
3096 _("failed internal consistency check"));
3100 case_N_STSYM
: /* Static symbol in data segment. */
3101 case N_DSLINE
: /* Source line number, data segment. */
3102 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3103 goto define_a_symbol
;
3105 case_N_LCSYM
: /* Static symbol in BSS segment. */
3106 case N_BSLINE
: /* Source line number, BSS segment. */
3107 /* N_BROWS: overlaps with N_BSLINE. */
3108 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3109 goto define_a_symbol
;
3111 case_N_ROSYM
: /* Static symbol in read-only data segment. */
3112 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3113 goto define_a_symbol
;
3115 case N_ENTRY
: /* Alternate entry point. */
3116 /* Relocate for dynamic loading. */
3117 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3118 goto define_a_symbol
;
3120 /* The following symbol types we don't know how to process.
3121 Handle them in a "default" way, but complain to people who
3124 case N_CATCH
: /* Exception handler catcher. */
3125 case N_EHDECL
: /* Exception handler name. */
3126 case N_PC
: /* Global symbol in Pascal. */
3127 case N_M2C
: /* Modula-2 compilation unit. */
3128 /* N_MOD2: overlaps with N_EHDECL. */
3129 case N_SCOPE
: /* Modula-2 scope information. */
3130 case N_ECOML
: /* End common (local name). */
3131 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3136 unknown_symtype_complaint (hex_string (type
));
3139 /* The following symbol types don't need the address field
3140 relocated, since it is either unused, or is absolute. */
3142 case N_GSYM
: /* Global variable. */
3143 case N_NSYMS
: /* Number of symbols (Ultrix). */
3144 case N_NOMAP
: /* No map? (Ultrix). */
3145 case N_RSYM
: /* Register variable. */
3146 case N_DEFD
: /* Modula-2 GNU module dependency. */
3147 case N_SSYM
: /* Struct or union element. */
3148 case N_LSYM
: /* Local symbol in stack. */
3149 case N_PSYM
: /* Parameter variable. */
3150 case N_LENG
: /* Length of preceding symbol type. */
3154 char *colon_pos
= strchr (name
, ':');
3156 if (colon_pos
== NULL
)
3159 deftype
= colon_pos
[1];
3165 function_stab_type
= type
;
3167 /* Deal with the SunPRO 3.0 compiler which omits the
3168 address from N_FUN symbols. */
3170 && valu
== ANOFFSET (section_offsets
,
3171 SECT_OFF_TEXT (objfile
))
3172 && gdbarch_sofun_address_maybe_missing (gdbarch
))
3174 CORE_ADDR minsym_valu
=
3175 find_stab_function_addr (name
, last_source_file
, objfile
);
3177 /* The function find_stab_function_addr will return
3178 0 if the minimal symbol wasn't found.
3179 (Unfortunately, this might also be a valid
3180 address.) Anyway, if it *does* return 0, it is
3181 likely that the value was set correctly to begin
3183 if (minsym_valu
!= 0)
3187 if (block_address_function_relative
)
3188 /* For Solaris 2 compilers, the block addresses and
3189 N_SLINE's are relative to the start of the
3190 function. On normal systems, and when using GCC on
3191 Solaris 2, these addresses are just absolute, or
3192 relative to the N_SO, depending on
3193 BLOCK_ADDRESS_ABSOLUTE. */
3194 function_start_offset
= valu
;
3196 within_function
= 1;
3198 if (context_stack_depth
> 1)
3200 complaint (&symfile_complaints
,
3201 _("unmatched N_LBRAC before symtab pos %d"),
3206 if (context_stack_depth
> 0)
3208 struct block
*block
;
3210 new = pop_context ();
3211 /* Make a block for the local symbols within. */
3212 block
= finish_block (new->name
, &local_symbols
,
3213 new->old_blocks
, new->start_addr
,
3216 /* For C++, set the block's scope. */
3217 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
3218 cp_set_block_scope (new->name
, block
,
3219 &objfile
->objfile_obstack
,
3223 new = push_context (0, valu
);
3224 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3228 define_symbol (valu
, name
, desc
, type
, objfile
);
3234 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3235 for a bunch of other flags, too. Someday we may parse their
3236 flags; for now we ignore theirs and hope they'll ignore ours. */
3237 case N_OPT
: /* Solaris 2: Compiler options. */
3240 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3242 processing_gcc_compilation
= 2;
3243 #if 0 /* Works, but is experimental. -fnf */
3244 /* For now, stay with AUTO_DEMANGLING for g++ output, as
3245 we don't know whether it will use the old style or v3
3247 if (AUTO_DEMANGLING
)
3249 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
3258 case N_MAIN
: /* Name of main routine. */
3259 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3260 it with a symbol file with "main" and without N_MAIN. I'm
3261 not sure exactly what rule to follow but probably something
3262 like: N_MAIN takes precedence over "main" no matter what
3263 objfile it is in; If there is more than one N_MAIN, choose
3264 the one in the symfile_objfile; If there is more than one
3265 N_MAIN within a given objfile, complain() and choose
3266 arbitrarily. (kingdon) */
3268 set_main_name (name
);
3271 /* The following symbol types can be ignored. */
3272 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3273 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3274 /* N_UNDF: Solaris 2: File separator mark. */
3275 /* N_UNDF: -- we will never encounter it, since we only process
3276 one file's symbols at once. */
3277 case N_ENDM
: /* Solaris 2: End of module. */
3278 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3282 /* '#' is a GNU C extension to allow one symbol to refer to another
3285 Generally this is used so that an alias can refer to its main
3290 /* Initialize symbol reference names and determine if this is a
3291 definition. If a symbol reference is being defined, go ahead
3292 and add it. Otherwise, just return. */
3297 /* If this stab defines a new reference ID that is not on the
3298 reference list, then put it on the reference list.
3300 We go ahead and advance NAME past the reference, even though
3301 it is not strictly necessary at this time. */
3302 refnum
= symbol_reference_defined (&s
);
3304 if (!ref_search (refnum
))
3305 ref_add (refnum
, 0, name
, valu
);
3309 previous_stab_code
= type
;
3312 /* FIXME: The only difference between this and elfstab_build_psymtabs
3313 is the call to install_minimal_symbols for elf, and the support for
3314 split sections. If the differences are really that small, the code
3315 should be shared. */
3317 /* Scan and build partial symbols for an coff symbol file.
3318 The coff file has already been processed to get its minimal symbols.
3320 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3323 OBJFILE is the object file we are reading symbols from.
3324 ADDR is the address relative to which the symbols are (e.g.
3325 the base address of the text segment).
3326 TEXTADDR is the address of the text section.
3327 TEXTSIZE is the size of the text section.
3328 STABSECTS is the list of .stab sections in OBJFILE.
3329 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3330 .stabstr section exists.
3332 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3333 adjusted for coff details. */
3336 coffstab_build_psymtabs (struct objfile
*objfile
,
3337 CORE_ADDR textaddr
, unsigned int textsize
,
3338 struct stab_section_list
*stabsects
,
3339 file_ptr stabstroffset
, unsigned int stabstrsize
)
3342 bfd
*sym_bfd
= objfile
->obfd
;
3343 char *name
= bfd_get_filename (sym_bfd
);
3344 struct dbx_symfile_info
*info
;
3345 unsigned int stabsize
;
3347 /* There is already a dbx_symfile_info allocated by our caller.
3348 It might even contain some info from the coff symtab to help us. */
3349 info
= objfile
->deprecated_sym_stab_info
;
3351 DBX_TEXT_ADDR (objfile
) = textaddr
;
3352 DBX_TEXT_SIZE (objfile
) = textsize
;
3354 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3355 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3356 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3358 if (stabstrsize
> bfd_get_size (sym_bfd
))
3359 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3360 DBX_STRINGTAB (objfile
) = (char *)
3361 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3362 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3364 /* Now read in the string table in one big gulp. */
3366 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3368 perror_with_name (name
);
3369 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3370 if (val
!= stabstrsize
)
3371 perror_with_name (name
);
3373 stabsread_new_init ();
3374 buildsym_new_init ();
3375 free_header_files ();
3376 init_header_files ();
3378 processing_acc_compilation
= 1;
3380 /* In a coff file, we've already installed the minimal symbols that came
3381 from the coff (non-stab) symbol table, so always act like an
3382 incremental load here. */
3383 if (stabsects
->next
== NULL
)
3385 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3386 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3387 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3391 struct stab_section_list
*stabsect
;
3393 DBX_SYMCOUNT (objfile
) = 0;
3394 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3396 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3397 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3400 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3402 symbuf_sections
= stabsects
->next
;
3403 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3407 dbx_symfile_read (objfile
, 0);
3410 /* Scan and build partial symbols for an ELF symbol file.
3411 This ELF file has already been processed to get its minimal symbols.
3413 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3416 OBJFILE is the object file we are reading symbols from.
3417 ADDR is the address relative to which the symbols are (e.g.
3418 the base address of the text segment).
3419 STABSECT is the BFD section information for the .stab section.
3420 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3421 .stabstr section exists.
3423 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3424 adjusted for elf details. */
3427 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
3428 file_ptr stabstroffset
, unsigned int stabstrsize
)
3431 bfd
*sym_bfd
= objfile
->obfd
;
3432 char *name
= bfd_get_filename (sym_bfd
);
3433 struct dbx_symfile_info
*info
;
3434 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
3436 /* There is already a dbx_symfile_info allocated by our caller.
3437 It might even contain some info from the ELF symtab to help us. */
3438 info
= objfile
->deprecated_sym_stab_info
;
3440 /* Find the first and last text address. dbx_symfile_read seems to
3442 find_text_range (sym_bfd
, objfile
);
3444 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3445 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3446 DBX_SYMCOUNT (objfile
)
3447 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3448 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3449 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3450 DBX_STAB_SECTION (objfile
) = stabsect
;
3452 if (stabstrsize
> bfd_get_size (sym_bfd
))
3453 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3454 DBX_STRINGTAB (objfile
) = (char *)
3455 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3456 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3458 /* Now read in the string table in one big gulp. */
3460 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3462 perror_with_name (name
);
3463 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3464 if (val
!= stabstrsize
)
3465 perror_with_name (name
);
3467 stabsread_new_init ();
3468 buildsym_new_init ();
3469 free_header_files ();
3470 init_header_files ();
3472 processing_acc_compilation
= 1;
3475 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3476 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3478 make_cleanup (free_current_contents
, (void *) &stabs_data
);
3480 /* In an elf file, we've already installed the minimal symbols that came
3481 from the elf (non-stab) symbol table, so always act like an
3482 incremental load here. dbx_symfile_read should not generate any new
3483 minimal symbols, since we will have already read the ELF dynamic symbol
3484 table and normal symbol entries won't be in the ".stab" section; but in
3485 case it does, it will install them itself. */
3486 dbx_symfile_read (objfile
, 0);
3488 do_cleanups (back_to
);
3491 /* Scan and build partial symbols for a file with special sections for stabs
3492 and stabstrings. The file has already been processed to get its minimal
3493 symbols, and any other symbols that might be necessary to resolve GSYMs.
3495 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3498 OBJFILE is the object file we are reading symbols from.
3499 ADDR is the address relative to which the symbols are (e.g. the base address
3500 of the text segment).
3501 STAB_NAME is the name of the section that contains the stabs.
3502 STABSTR_NAME is the name of the section that contains the stab strings.
3504 This routine is mostly copied from dbx_symfile_init and
3505 dbx_symfile_read. */
3508 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3509 char *stabstr_name
, char *text_name
)
3512 bfd
*sym_bfd
= objfile
->obfd
;
3513 char *name
= bfd_get_filename (sym_bfd
);
3515 asection
*stabstrsect
;
3516 asection
*text_sect
;
3518 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3519 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3525 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3526 "but not string section (%s)"),
3527 stab_name
, stabstr_name
);
3529 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
3530 xmalloc (sizeof (struct dbx_symfile_info
));
3531 memset (objfile
->deprecated_sym_stab_info
, 0,
3532 sizeof (struct dbx_symfile_info
));
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. */
3595 _initialize_dbxread (void)
3597 add_symtab_fns (&aout_sym_fns
);