1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2008, 2009.
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 /* This module provides three functions: dbx_symfile_init,
22 which initializes to read a symbol file; dbx_new_init, which
23 discards existing cached information when all symbols are being
24 discarded; and dbx_symfile_read, which reads a symbol table
27 dbx_symfile_read only does the minimum work necessary for letting the
28 user "name" things symbolically; it does not read the entire symtab.
29 Instead, it reads the external and static symbols and puts them in partial
30 symbol tables. When more extensive information is requested of a
31 file, the corresponding partial symbol table is mutated into a full
32 fledged symbol table by going back and reading the symbols
33 for real. dbx_psymtab_to_symtab() is the function that does this */
36 #include "gdb_string.h"
38 #if defined(__CYGNUSCLIB__)
39 #include <sys/types.h>
43 #include "gdb_obstack.h"
46 #include "breakpoint.h"
48 #include "gdbcore.h" /* for bfd stuff */
49 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
52 #include "stabsread.h"
53 #include "gdb-stabs.h"
55 #include "complaints.h"
57 #include "cp-support.h"
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 native, now */
66 /* We put a pointer to this structure in the read_symtab_private field
71 /* Offset within the file symbol table of first local symbol for this
76 /* Length (in bytes) of the section of the symbol table devoted to
77 this file's symbols (actually, the section bracketed may contain
78 more than just this file's symbols). If ldsymlen is 0, the only
79 reason for this thing's existence is the dependency list. Nothing
80 else will happen when it is read in. */
84 /* The size of each symbol in the symbol file (in external form). */
88 /* Further information needed to locate the symbols if they are in
93 int file_string_offset
;
96 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
97 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
98 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
99 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
100 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
101 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
102 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
105 /* Remember what we deduced to be the source language of this psymtab. */
107 static enum language psymtab_language
= language_unknown
;
109 /* The BFD for this file -- implicit parameter to next_symbol_text. */
111 static bfd
*symfile_bfd
;
113 /* The size of each symbol in the symbol file (in external form).
114 This is set by dbx_symfile_read when building psymtabs, and by
115 dbx_psymtab_to_symtab when building symtabs. */
117 static unsigned symbol_size
;
119 /* This is the offset of the symbol table in the executable file. */
121 static unsigned symbol_table_offset
;
123 /* This is the offset of the string table in the executable file. */
125 static unsigned string_table_offset
;
127 /* For elf+stab executables, the n_strx field is not a simple index
128 into the string table. Instead, each .o file has a base offset in
129 the string table, and the associated symbols contain offsets from
130 this base. The following two variables contain the base offset for
131 the current and next .o files. */
133 static unsigned int file_string_table_offset
;
134 static unsigned int next_file_string_table_offset
;
136 /* .o and NLM files contain unrelocated addresses which are based at
137 0. When non-zero, this flag disables some of the special cases for
138 Solaris elf+stab text addresses at location 0. */
140 static int symfile_relocatable
= 0;
142 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
143 relative to the function start address. */
145 static int block_address_function_relative
= 0;
147 /* The lowest text address we have yet encountered. This is needed
148 because in an a.out file, there is no header field which tells us
149 what address the program is actually going to be loaded at, so we
150 need to make guesses based on the symbols (which *are* relocated to
151 reflect the address it will be loaded at). */
153 static CORE_ADDR lowest_text_address
;
155 /* Non-zero if there is any line number info in the objfile. Prevents
156 end_psymtab from discarding an otherwise empty psymtab. */
158 static int has_line_numbers
;
160 /* Complaints about the symbols we have encountered. */
163 unknown_symtype_complaint (const char *arg1
)
165 complaint (&symfile_complaints
, _("unknown symbol type %s"), arg1
);
169 lbrac_mismatch_complaint (int arg1
)
171 complaint (&symfile_complaints
,
172 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1
);
176 repeated_header_complaint (const char *arg1
, int arg2
)
178 complaint (&symfile_complaints
,
179 _("\"repeated\" header file %s not previously seen, at symtab \
184 /* find_text_range --- find start and end of loadable code sections
186 The find_text_range function finds the shortest address range that
187 encloses all sections containing executable code, and stores it in
188 objfile's text_addr and text_size members.
190 dbx_symfile_read will use this to finish off the partial symbol
191 table, in some cases. */
194 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
201 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
202 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
204 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
205 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
209 if (sec_start
< start
)
224 error (_("Can't find any code sections in symbol file"));
226 DBX_TEXT_ADDR (objfile
) = start
;
227 DBX_TEXT_SIZE (objfile
) = end
- start
;
232 /* During initial symbol readin, we need to have a structure to keep
233 track of which psymtabs have which bincls in them. This structure
234 is used during readin to setup the list of dependencies within each
235 partial symbol table. */
237 struct header_file_location
239 char *name
; /* Name of header file */
240 int instance
; /* See above */
241 struct partial_symtab
*pst
; /* Partial symtab that has the
242 BINCL/EINCL defs for this file */
245 /* The actual list and controling variables */
246 static struct header_file_location
*bincl_list
, *next_bincl
;
247 static int bincls_allocated
;
249 /* Local function prototypes */
251 extern void _initialize_dbxread (void);
253 static void read_ofile_symtab (struct partial_symtab
*);
255 static void dbx_psymtab_to_symtab (struct partial_symtab
*);
257 static void dbx_psymtab_to_symtab_1 (struct partial_symtab
*);
259 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
261 static void read_dbx_symtab (struct objfile
*);
263 static void free_bincl_list (struct objfile
*);
265 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
267 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
269 static void init_bincl_list (int, struct objfile
*);
271 static char *dbx_next_symbol_text (struct objfile
*);
273 static void fill_symbuf (bfd
*);
275 static void dbx_symfile_init (struct objfile
*);
277 static void dbx_new_init (struct objfile
*);
279 static void dbx_symfile_read (struct objfile
*, int);
281 static void dbx_symfile_finish (struct objfile
*);
283 static void record_minimal_symbol (char *, CORE_ADDR
, int, struct objfile
*);
285 static void add_new_header_file (char *, int);
287 static void add_old_header_file (char *, int);
289 static void add_this_object_header_file (int);
291 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
293 struct partial_symbol
**,
294 struct partial_symbol
**);
296 /* Free up old header file tables */
299 free_header_files (void)
301 if (this_object_header_files
)
303 xfree (this_object_header_files
);
304 this_object_header_files
= NULL
;
306 n_allocated_this_object_header_files
= 0;
309 /* Allocate new header file tables */
312 init_header_files (void)
314 n_allocated_this_object_header_files
= 10;
315 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
318 /* Add header file number I for this object file
319 at the next successive FILENUM. */
322 add_this_object_header_file (int i
)
324 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
326 n_allocated_this_object_header_files
*= 2;
327 this_object_header_files
328 = (int *) xrealloc ((char *) this_object_header_files
,
329 n_allocated_this_object_header_files
* sizeof (int));
332 this_object_header_files
[n_this_object_header_files
++] = i
;
335 /* Add to this file an "old" header file, one already seen in
336 a previous object file. NAME is the header file's name.
337 INSTANCE is its instance code, to select among multiple
338 symbol tables for the same header file. */
341 add_old_header_file (char *name
, int instance
)
343 struct header_file
*p
= HEADER_FILES (current_objfile
);
346 for (i
= 0; i
< N_HEADER_FILES (current_objfile
); i
++)
347 if (strcmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
349 add_this_object_header_file (i
);
352 repeated_header_complaint (name
, symnum
);
355 /* Add to this file a "new" header file: definitions for its types follow.
356 NAME is the header file's name.
357 Most often this happens only once for each distinct header file,
358 but not necessarily. If it happens more than once, INSTANCE has
359 a different value each time, and references to the header file
360 use INSTANCE values to select among them.
362 dbx output contains "begin" and "end" markers for each new header file,
363 but at this level we just need to know which files there have been;
364 so we record the file when its "begin" is seen and ignore the "end". */
367 add_new_header_file (char *name
, int instance
)
370 struct header_file
*hfile
;
372 /* Make sure there is room for one more header file. */
374 i
= N_ALLOCATED_HEADER_FILES (current_objfile
);
376 if (N_HEADER_FILES (current_objfile
) == i
)
380 N_ALLOCATED_HEADER_FILES (current_objfile
) = 10;
381 HEADER_FILES (current_objfile
) = (struct header_file
*)
382 xmalloc (10 * sizeof (struct header_file
));
387 N_ALLOCATED_HEADER_FILES (current_objfile
) = i
;
388 HEADER_FILES (current_objfile
) = (struct header_file
*)
389 xrealloc ((char *) HEADER_FILES (current_objfile
),
390 (i
* sizeof (struct header_file
)));
394 /* Create an entry for this header file. */
396 i
= N_HEADER_FILES (current_objfile
)++;
397 hfile
= HEADER_FILES (current_objfile
) + i
;
398 hfile
->name
= xstrdup (name
);
399 hfile
->instance
= instance
;
402 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
403 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
405 add_this_object_header_file (i
);
409 static struct type
**
410 explicit_lookup_type (int real_filenum
, int index
)
412 struct header_file
*f
= &HEADER_FILES (current_objfile
)[real_filenum
];
414 if (index
>= f
->length
)
417 f
->vector
= (struct type
**)
418 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
419 memset (&f
->vector
[f
->length
/ 2],
420 '\0', f
->length
* sizeof (struct type
*) / 2);
422 return &f
->vector
[index
];
427 record_minimal_symbol (char *name
, CORE_ADDR address
, int type
,
428 struct objfile
*objfile
)
430 enum minimal_symbol_type ms_type
;
432 asection
*bfd_section
;
438 section
= SECT_OFF_TEXT (objfile
);
439 bfd_section
= DBX_TEXT_SECTION (objfile
);
443 section
= SECT_OFF_DATA (objfile
);
444 bfd_section
= DBX_DATA_SECTION (objfile
);
448 section
= SECT_OFF_BSS (objfile
);
449 bfd_section
= DBX_BSS_SECTION (objfile
);
459 section
= SECT_OFF_DATA (objfile
);
460 bfd_section
= DBX_DATA_SECTION (objfile
);
463 /* I don't think this type actually exists; since a N_SETV is the result
464 of going over many .o files, it doesn't make sense to have one
466 ms_type
= mst_file_data
;
467 section
= SECT_OFF_DATA (objfile
);
468 bfd_section
= DBX_DATA_SECTION (objfile
);
475 ms_type
= mst_file_text
;
476 section
= SECT_OFF_TEXT (objfile
);
477 bfd_section
= DBX_TEXT_SECTION (objfile
);
480 ms_type
= mst_file_data
;
482 /* Check for __DYNAMIC, which is used by Sun shared libraries.
483 Record it as global even if it's local, not global, so
484 lookup_minimal_symbol can find it. We don't check symbol_leading_char
485 because for SunOS4 it always is '_'. */
486 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
489 /* Same with virtual function tables, both global and static. */
491 char *tempstring
= name
;
492 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
494 if (is_vtable_name (tempstring
))
497 section
= SECT_OFF_DATA (objfile
);
498 bfd_section
= DBX_DATA_SECTION (objfile
);
501 ms_type
= mst_file_bss
;
502 section
= SECT_OFF_BSS (objfile
);
503 bfd_section
= DBX_BSS_SECTION (objfile
);
506 ms_type
= mst_unknown
;
512 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
513 && address
< lowest_text_address
)
514 lowest_text_address
= address
;
516 prim_record_minimal_symbol_and_info
517 (name
, address
, ms_type
, section
, bfd_section
, objfile
);
520 /* Scan and build partial symbols for a symbol file.
521 We have been initialized by a call to dbx_symfile_init, which
522 put all the relevant info into a "struct dbx_symfile_info",
523 hung off the objfile structure.
525 MAINLINE is true if we are reading the main symbol
526 table (as opposed to a shared lib or dynamically loaded file). */
529 dbx_symfile_read (struct objfile
*objfile
, int mainline
)
533 struct cleanup
*back_to
;
535 sym_bfd
= objfile
->obfd
;
537 /* .o and .nlm files are relocatables with text, data and bss segs based at
538 0. This flag disables special (Solaris stabs-in-elf only) fixups for
539 symbols with a value of 0. */
541 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
543 /* This is true for Solaris (and all other systems which put stabs
544 in sections, hopefully, since it would be silly to do things
545 differently from Solaris), and false for SunOS4 and other a.out
547 block_address_function_relative
=
548 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
549 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
550 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
551 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
552 || (0 == strncmp (bfd_get_target (sym_bfd
), "epoc-pe", 7))
553 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
555 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
557 perror_with_name (objfile
->name
);
559 /* If we are reinitializing, or if we have never loaded syms yet, init */
561 || (objfile
->global_psymbols
.size
== 0
562 && objfile
->static_psymbols
.size
== 0))
563 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
565 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
566 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
568 free_pending_blocks ();
569 back_to
= make_cleanup (really_free_pendings
, 0);
571 init_minimal_symbol_collection ();
572 make_cleanup_discard_minimal_symbols ();
574 /* Read stabs data from executable file and define symbols. */
576 read_dbx_symtab (objfile
);
578 /* Add the dynamic symbols. */
580 read_dbx_dynamic_symtab (objfile
);
582 /* Install any minimal symbols that have been collected as the current
583 minimal symbols for this objfile. */
585 install_minimal_symbols (objfile
);
587 do_cleanups (back_to
);
590 /* Initialize anything that needs initializing when a completely new
591 symbol file is specified (not just adding some symbols from another
592 file, e.g. a shared library). */
595 dbx_new_init (struct objfile
*ignore
)
597 stabsread_new_init ();
598 buildsym_new_init ();
599 init_header_files ();
603 /* dbx_symfile_init ()
604 is the dbx-specific initialization routine for reading symbols.
605 It is passed a struct objfile which contains, among other things,
606 the BFD for the file whose symbols are being read, and a slot for a pointer
607 to "private data" which we fill with goodies.
609 We read the string table into malloc'd space and stash a pointer to it.
611 Since BFD doesn't know how to read debug symbols in a format-independent
612 way (and may never do so...), we have to do it ourselves. We will never
613 be called unless this is an a.out (or very similar) file.
614 FIXME, there should be a cleaner peephole into the BFD environment here. */
616 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
619 dbx_symfile_init (struct objfile
*objfile
)
622 bfd
*sym_bfd
= objfile
->obfd
;
623 char *name
= bfd_get_filename (sym_bfd
);
625 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
627 /* Allocate struct to keep track of the symfile */
628 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
629 xmalloc (sizeof (struct dbx_symfile_info
));
630 memset (objfile
->deprecated_sym_stab_info
, 0,
631 sizeof (struct dbx_symfile_info
));
633 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
634 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
635 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
637 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
638 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
639 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
641 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
643 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
645 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
647 error (_("Can't find .text section in symbol file"));
648 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
649 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
651 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
652 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
653 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
655 /* Read the string table and stash it away in the objfile_obstack.
656 When we blow away the objfile the string table goes away as well.
657 Note that gdb used to use the results of attempting to malloc the
658 string table, based on the size it read, as a form of sanity check
659 for botched byte swapping, on the theory that a byte swapped string
660 table size would be so totally bogus that the malloc would fail. Now
661 that we put in on the objfile_obstack, we can't do this since gdb gets
662 a fatal error (out of virtual memory) if the size is bogus. We can
663 however at least check to see if the size is less than the size of
664 the size field itself, or larger than the size of the entire file.
665 Note that all valid string tables have a size greater than zero, since
666 the bytes used to hold the size are included in the count. */
668 if (STRING_TABLE_OFFSET
== 0)
670 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
671 will never be zero, even when there is no string table. This
672 would appear to be a bug in bfd. */
673 DBX_STRINGTAB_SIZE (objfile
) = 0;
674 DBX_STRINGTAB (objfile
) = NULL
;
678 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
680 perror_with_name (name
);
682 memset (size_temp
, 0, sizeof (size_temp
));
683 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
686 perror_with_name (name
);
690 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
691 EOF if there is no string table, and attempting to read the size
692 from EOF will read zero bytes. */
693 DBX_STRINGTAB_SIZE (objfile
) = 0;
694 DBX_STRINGTAB (objfile
) = NULL
;
698 /* Read some data that would appear to be the string table size.
699 If there really is a string table, then it is probably the right
700 size. Byteswap if necessary and validate the size. Note that
701 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
702 random data that happened to be at STRING_TABLE_OFFSET, because
703 bfd can't tell us there is no string table, the sanity checks may
704 or may not catch this. */
705 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
707 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
708 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
709 error (_("ridiculous string table size (%d bytes)."),
710 DBX_STRINGTAB_SIZE (objfile
));
712 DBX_STRINGTAB (objfile
) =
713 (char *) obstack_alloc (&objfile
->objfile_obstack
,
714 DBX_STRINGTAB_SIZE (objfile
));
715 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
717 /* Now read in the string table in one big gulp. */
719 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
721 perror_with_name (name
);
722 val
= bfd_bread (DBX_STRINGTAB (objfile
),
723 DBX_STRINGTAB_SIZE (objfile
),
725 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
726 perror_with_name (name
);
731 /* Perform any local cleanups required when we are done with a particular
732 objfile. I.E, we are in the process of discarding all symbol information
733 for an objfile, freeing up all memory held for it, and unlinking the
734 objfile struct from the global list of known objfiles. */
737 dbx_symfile_finish (struct objfile
*objfile
)
739 if (objfile
->deprecated_sym_stab_info
!= NULL
)
741 if (HEADER_FILES (objfile
) != NULL
)
743 int i
= N_HEADER_FILES (objfile
);
744 struct header_file
*hfiles
= HEADER_FILES (objfile
);
748 xfree (hfiles
[i
].name
);
749 xfree (hfiles
[i
].vector
);
753 xfree (objfile
->deprecated_sym_stab_info
);
755 free_header_files ();
759 /* Buffer for reading the symbol table entries. */
760 static struct external_nlist symbuf
[4096];
761 static int symbuf_idx
;
762 static int symbuf_end
;
764 /* Name of last function encountered. Used in Solaris to approximate
765 object file boundaries. */
766 static char *last_function_name
;
768 /* The address in memory of the string table of the object file we are
769 reading (which might not be the "main" object file, but might be a
770 shared library or some other dynamically loaded thing). This is
771 set by read_dbx_symtab when building psymtabs, and by
772 read_ofile_symtab when building symtabs, and is used only by
773 next_symbol_text. FIXME: If that is true, we don't need it when
774 building psymtabs, right? */
775 static char *stringtab_global
;
777 /* These variables are used to control fill_symbuf when the stabs
778 symbols are not contiguous (as may be the case when a COFF file is
779 linked using --split-by-reloc). */
780 static struct stab_section_list
*symbuf_sections
;
781 static unsigned int symbuf_left
;
782 static unsigned int symbuf_read
;
784 /* This variable stores a global stabs buffer, if we read stabs into
785 memory in one chunk in order to process relocations. */
786 static bfd_byte
*stabs_data
;
788 /* Refill the symbol table input buffer
789 and set the variables that control fetching entries from it.
790 Reports an error if no data available.
791 This function can read past the end of the symbol table
792 (into the string table) but this does no harm. */
795 fill_symbuf (bfd
*sym_bfd
)
802 nbytes
= sizeof (symbuf
);
803 if (nbytes
> symbuf_left
)
804 nbytes
= symbuf_left
;
805 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
807 else if (symbuf_sections
== NULL
)
809 count
= sizeof (symbuf
);
810 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
814 if (symbuf_left
<= 0)
816 file_ptr filepos
= symbuf_sections
->section
->filepos
;
817 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
818 perror_with_name (bfd_get_filename (sym_bfd
));
819 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
820 symbol_table_offset
= filepos
- symbuf_read
;
821 symbuf_sections
= symbuf_sections
->next
;
825 if (count
> sizeof (symbuf
))
826 count
= sizeof (symbuf
);
827 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
831 perror_with_name (bfd_get_filename (sym_bfd
));
832 else if (nbytes
== 0)
833 error (_("Premature end of file reading symbol table"));
834 symbuf_end
= nbytes
/ symbol_size
;
836 symbuf_left
-= nbytes
;
837 symbuf_read
+= nbytes
;
841 stabs_seek (int sym_offset
)
845 symbuf_read
+= sym_offset
;
846 symbuf_left
-= sym_offset
;
849 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
852 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
854 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
855 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
856 (intern).n_other = 0; \
857 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
858 if (bfd_get_sign_extend_vma (abfd)) \
859 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
861 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
864 /* Invariant: The symbol pointed to by symbuf_idx is the first one
865 that hasn't been swapped. Swap the symbol at the same time
866 that symbuf_idx is incremented. */
868 /* dbx allows the text of a symbol name to be continued into the
869 next symbol name! When such a continuation is encountered
870 (a \ at the end of the text of a name)
871 call this function to get the continuation. */
874 dbx_next_symbol_text (struct objfile
*objfile
)
876 struct internal_nlist nlist
;
878 if (symbuf_idx
== symbuf_end
)
879 fill_symbuf (symfile_bfd
);
882 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
883 OBJSTAT (objfile
, n_stabs
++);
887 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
890 /* Initialize the list of bincls to contain none and have some
894 init_bincl_list (int number
, struct objfile
*objfile
)
896 bincls_allocated
= number
;
897 next_bincl
= bincl_list
= (struct header_file_location
*)
898 xmalloc (bincls_allocated
* sizeof (struct header_file_location
));
901 /* Add a bincl to the list. */
904 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
906 if (next_bincl
>= bincl_list
+ bincls_allocated
)
908 int offset
= next_bincl
- bincl_list
;
909 bincls_allocated
*= 2;
910 bincl_list
= (struct header_file_location
*)
911 xrealloc ((char *) bincl_list
,
912 bincls_allocated
* sizeof (struct header_file_location
));
913 next_bincl
= bincl_list
+ offset
;
915 next_bincl
->pst
= pst
;
916 next_bincl
->instance
= instance
;
917 next_bincl
++->name
= name
;
920 /* Given a name, value pair, find the corresponding
921 bincl in the list. Return the partial symtab associated
922 with that header_file_location. */
924 static struct partial_symtab
*
925 find_corresponding_bincl_psymtab (char *name
, int instance
)
927 struct header_file_location
*bincl
;
929 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
930 if (bincl
->instance
== instance
931 && strcmp (name
, bincl
->name
) == 0)
934 repeated_header_complaint (name
, symnum
);
935 return (struct partial_symtab
*) 0;
938 /* Free the storage allocated for the bincl list. */
941 free_bincl_list (struct objfile
*objfile
)
944 bincls_allocated
= 0;
948 do_free_bincl_list_cleanup (void *objfile
)
950 free_bincl_list (objfile
);
953 static struct cleanup
*
954 make_cleanup_free_bincl_list (struct objfile
*objfile
)
956 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
959 /* Set namestring based on nlist. If the string table index is invalid,
960 give a fake name, and print a single error message per symbol file read,
961 rather than abort the symbol reading or flood the user with messages. */
964 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
968 if (nlist
->n_strx
+ file_string_table_offset
969 >= DBX_STRINGTAB_SIZE (objfile
)
970 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
972 complaint (&symfile_complaints
, _("bad string table offset in symbol %d"),
974 namestring
= "<bad string table offset>";
977 namestring
= (nlist
->n_strx
+ file_string_table_offset
978 + DBX_STRINGTAB (objfile
));
982 /* Scan a SunOs dynamic symbol table for symbols of interest and
983 add them to the minimal symbol table. */
986 read_dbx_dynamic_symtab (struct objfile
*objfile
)
988 bfd
*abfd
= objfile
->obfd
;
989 struct cleanup
*back_to
;
1002 /* Check that the symbol file has dynamic symbols that we know about.
1003 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1004 on a sun4 host (and vice versa) and bfd is not configured
1005 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1006 so we ignore the dynamic symbols in this case. */
1007 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1008 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1009 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1012 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1013 if (dynsym_size
< 0)
1016 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1017 back_to
= make_cleanup (xfree
, dynsyms
);
1019 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1020 if (dynsym_count
< 0)
1022 do_cleanups (back_to
);
1026 /* Enter dynamic symbols into the minimal symbol table
1027 if this is a stripped executable. */
1028 if (bfd_get_symcount (abfd
) <= 0)
1031 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1033 asymbol
*sym
= *symptr
;
1037 sec
= bfd_get_section (sym
);
1039 /* BFD symbols are section relative. */
1040 sym_value
= sym
->value
+ sec
->vma
;
1042 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1044 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1045 SECT_OFF_TEXT (objfile
));
1048 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1050 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1051 SECT_OFF_DATA (objfile
));
1054 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1056 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1057 SECT_OFF_BSS (objfile
));
1063 if (sym
->flags
& BSF_GLOBAL
)
1066 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1071 /* Symbols from shared libraries have a dynamic relocation entry
1072 that points to the associated slot in the procedure linkage table.
1073 We make a mininal symbol table entry with type mst_solib_trampoline
1074 at the address in the procedure linkage table. */
1075 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1076 if (dynrel_size
< 0)
1078 do_cleanups (back_to
);
1082 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1083 make_cleanup (xfree
, dynrels
);
1085 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1086 if (dynrel_count
< 0)
1088 do_cleanups (back_to
);
1092 for (counter
= 0, relptr
= dynrels
;
1093 counter
< dynrel_count
;
1094 counter
++, relptr
++)
1096 arelent
*rel
= *relptr
;
1098 rel
->address
+ ANOFFSET (objfile
->section_offsets
,
1099 SECT_OFF_DATA (objfile
));
1101 switch (bfd_get_arch (abfd
))
1103 case bfd_arch_sparc
:
1104 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1108 /* `16' is the type BFD produces for a jump table relocation. */
1109 if (rel
->howto
->type
!= 16)
1112 /* Adjust address in the jump table to point to
1113 the start of the bsr instruction. */
1120 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1121 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1125 do_cleanups (back_to
);
1129 find_stab_function_addr (char *namestring
, char *filename
,
1130 struct objfile
*objfile
)
1132 struct minimal_symbol
*msym
;
1136 p
= strchr (namestring
, ':');
1141 strncpy (p
, namestring
, n
);
1144 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1147 /* Sun Fortran appends an underscore to the minimal symbol name,
1148 try again with an appended underscore if the minimal symbol
1152 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1155 if (msym
== NULL
&& filename
!= NULL
)
1157 /* Try again without the filename. */
1159 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1161 if (msym
== NULL
&& filename
!= NULL
)
1163 /* And try again for Sun Fortran, but without the filename. */
1166 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1169 return msym
== NULL
? 0 : SYMBOL_VALUE_ADDRESS (msym
);
1173 function_outside_compilation_unit_complaint (const char *arg1
)
1175 complaint (&symfile_complaints
,
1176 _("function `%s' appears to be defined outside of all compilation \
1181 /* Setup partial_symtab's describing each source file for which
1182 debugging information is available. */
1185 read_dbx_symtab (struct objfile
*objfile
)
1187 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1188 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1189 struct internal_nlist nlist
;
1190 CORE_ADDR text_addr
;
1197 int past_first_source_file
= 0;
1198 CORE_ADDR last_o_file_start
= 0;
1199 CORE_ADDR last_function_start
= 0;
1200 struct cleanup
*back_to
;
1202 int textlow_not_set
;
1203 int data_sect_index
;
1205 /* Current partial symtab */
1206 struct partial_symtab
*pst
;
1208 /* List of current psymtab's include files */
1209 char **psymtab_include_list
;
1210 int includes_allocated
;
1213 /* Index within current psymtab dependency list */
1214 struct partial_symtab
**dependency_list
;
1215 int dependencies_used
, dependencies_allocated
;
1217 text_addr
= DBX_TEXT_ADDR (objfile
);
1218 text_size
= DBX_TEXT_SIZE (objfile
);
1220 /* FIXME. We probably want to change stringtab_global rather than add this
1221 while processing every symbol entry. FIXME. */
1222 file_string_table_offset
= 0;
1223 next_file_string_table_offset
= 0;
1225 stringtab_global
= DBX_STRINGTAB (objfile
);
1227 pst
= (struct partial_symtab
*) 0;
1229 includes_allocated
= 30;
1231 psymtab_include_list
= (char **) alloca (includes_allocated
*
1234 dependencies_allocated
= 30;
1235 dependencies_used
= 0;
1237 (struct partial_symtab
**) alloca (dependencies_allocated
*
1238 sizeof (struct partial_symtab
*));
1240 /* Init bincl list */
1241 init_bincl_list (20, objfile
);
1242 back_to
= make_cleanup_free_bincl_list (objfile
);
1244 last_source_file
= NULL
;
1246 lowest_text_address
= (CORE_ADDR
) -1;
1248 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1249 abfd
= objfile
->obfd
;
1250 symbuf_end
= symbuf_idx
= 0;
1251 next_symbol_text_func
= dbx_next_symbol_text
;
1252 textlow_not_set
= 1;
1253 has_line_numbers
= 0;
1255 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1256 to global and static variables. The stab for a global or static
1257 variable doesn't give us any indication of which section it's in,
1258 so we can't tell immediately which offset in
1259 objfile->section_offsets we should apply to the variable's
1262 We could certainly find out which section contains the variable
1263 by looking up the variable's unrelocated address with
1264 find_pc_section, but that would be expensive; this is the
1265 function that constructs the partial symbol tables by examining
1266 every symbol in the entire executable, and it's
1267 performance-critical. So that expense would not be welcome. I'm
1268 not sure what to do about this at the moment.
1270 What we have done for years is to simply assume that the .data
1271 section's offset is appropriate for all global and static
1272 variables. Recently, this was expanded to fall back to the .bss
1273 section's offset if there is no .data section, and then to the
1274 .rodata section's offset. */
1275 data_sect_index
= objfile
->sect_index_data
;
1276 if (data_sect_index
== -1)
1277 data_sect_index
= SECT_OFF_BSS (objfile
);
1278 if (data_sect_index
== -1)
1279 data_sect_index
= SECT_OFF_RODATA (objfile
);
1281 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1282 for the file to have no .data, no .bss, and no .text at all, if
1283 it also has no global or static variables. If it does, we will
1284 get an internal error from an ANOFFSET macro below when we try to
1285 use data_sect_index. */
1287 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1289 /* Get the symbol for this run and pull out some info */
1290 QUIT
; /* allow this to be interruptable */
1291 if (symbuf_idx
== symbuf_end
)
1293 bufp
= &symbuf
[symbuf_idx
++];
1296 * Special case to speed up readin.
1298 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1300 has_line_numbers
= 1;
1304 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1305 OBJSTAT (objfile
, n_stabs
++);
1307 /* Ok. There is a lot of code duplicated in the rest of this
1308 switch statement (for efficiency reasons). Since I don't
1309 like duplicating code, I will do my penance here, and
1310 describe the code which is duplicated:
1312 *) The assignment to namestring.
1313 *) The call to strchr.
1314 *) The addition of a partial symbol the the two partial
1315 symbol lists. This last is a large section of code, so
1316 I've imbedded it in the following macro.
1319 switch (nlist
.n_type
)
1322 * Standard, external, non-debugger, symbols
1325 case N_TEXT
| N_EXT
:
1326 case N_NBTEXT
| N_EXT
:
1327 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1328 SECT_OFF_TEXT (objfile
));
1331 case N_DATA
| N_EXT
:
1332 case N_NBDATA
| N_EXT
:
1333 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1334 SECT_OFF_DATA (objfile
));
1339 case N_NBBSS
| N_EXT
:
1340 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1341 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1342 SECT_OFF_BSS (objfile
));
1347 namestring
= set_namestring (objfile
, &nlist
);
1350 record_minimal_symbol (namestring
, nlist
.n_value
,
1351 nlist
.n_type
, objfile
); /* Always */
1354 /* Standard, local, non-debugger, symbols */
1358 /* We need to be able to deal with both N_FN or N_TEXT,
1359 because we have no way of knowing whether the sys-supplied ld
1360 or GNU ld was used to make the executable. Sequents throw
1361 in another wrinkle -- they renumbered N_FN. */
1366 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1367 SECT_OFF_TEXT (objfile
));
1368 namestring
= set_namestring (objfile
, &nlist
);
1370 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1371 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1372 && namestring
[nsl
- 2] == '.'))
1374 if (past_first_source_file
&& pst
1375 /* The gould NP1 uses low values for .o and -l symbols
1376 which are not the address. */
1377 && nlist
.n_value
>= pst
->textlow
)
1379 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1380 symnum
* symbol_size
,
1381 nlist
.n_value
> pst
->texthigh
1382 ? nlist
.n_value
: pst
->texthigh
,
1383 dependency_list
, dependencies_used
,
1385 pst
= (struct partial_symtab
*) 0;
1387 dependencies_used
= 0;
1388 has_line_numbers
= 0;
1391 past_first_source_file
= 1;
1392 last_o_file_start
= nlist
.n_value
;
1399 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1400 SECT_OFF_DATA (objfile
));
1403 case N_UNDF
| N_EXT
:
1404 if (nlist
.n_value
!= 0)
1406 /* This is a "Fortran COMMON" symbol. See if the target
1407 environment knows where it has been relocated to. */
1411 namestring
= set_namestring (objfile
, &nlist
);
1412 if (target_lookup_symbol (namestring
, &reladdr
))
1414 continue; /* Error in lookup; ignore symbol for now. */
1416 nlist
.n_type
^= (N_BSS
^ N_UNDF
); /* Define it as a bss-symbol */
1417 nlist
.n_value
= reladdr
;
1418 goto bss_ext_symbol
;
1420 continue; /* Just undefined, not COMMON */
1423 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1425 /* Deal with relative offsets in the string table
1426 used in ELF+STAB under Solaris. If we want to use the
1427 n_strx field, which contains the name of the file,
1428 we must adjust file_string_table_offset *before* calling
1429 set_namestring(). */
1430 past_first_source_file
= 1;
1431 file_string_table_offset
= next_file_string_table_offset
;
1432 next_file_string_table_offset
=
1433 file_string_table_offset
+ nlist
.n_value
;
1434 if (next_file_string_table_offset
< file_string_table_offset
)
1435 error (_("string table offset backs up at %d"), symnum
);
1436 /* FIXME -- replace error() with complaint. */
1441 /* Lots of symbol types we can just ignore. */
1448 /* Keep going . . . */
1451 * Special symbol types for GNU
1454 case N_INDR
| N_EXT
:
1456 case N_SETA
| N_EXT
:
1458 case N_SETT
| N_EXT
:
1460 case N_SETD
| N_EXT
:
1462 case N_SETB
| N_EXT
:
1473 static int prev_so_symnum
= -10;
1474 static int first_so_symnum
;
1476 static char *dirname_nso
;
1477 int prev_textlow_not_set
;
1479 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1480 SECT_OFF_TEXT (objfile
));
1482 prev_textlow_not_set
= textlow_not_set
;
1484 /* A zero value is probably an indication for the SunPRO 3.0
1485 compiler. end_psymtab explicitly tests for zero, so
1486 don't relocate it. */
1488 if (nlist
.n_value
== 0
1489 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1491 textlow_not_set
= 1;
1495 textlow_not_set
= 0;
1497 past_first_source_file
= 1;
1499 if (prev_so_symnum
!= symnum
- 1)
1500 { /* Here if prev stab wasn't N_SO */
1501 first_so_symnum
= symnum
;
1505 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1506 symnum
* symbol_size
,
1507 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1508 dependency_list
, dependencies_used
,
1509 prev_textlow_not_set
);
1510 pst
= (struct partial_symtab
*) 0;
1512 dependencies_used
= 0;
1513 has_line_numbers
= 0;
1517 prev_so_symnum
= symnum
;
1519 /* End the current partial symtab and start a new one */
1521 namestring
= set_namestring (objfile
, &nlist
);
1523 /* Null name means end of .o file. Don't start a new one. */
1524 if (*namestring
== '\000')
1527 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1528 The first one is a directory name; the second the file name.
1529 If pst exists, is empty, and has a filename ending in '/',
1530 we assume the previous N_SO was a directory name. */
1532 p
= strrchr (namestring
, '/');
1533 if (p
&& *(p
+ 1) == '\000')
1535 /* Save the directory name SOs locally, then save it into
1536 the psymtab when it's created below. */
1537 dirname_nso
= namestring
;
1541 /* Some other compilers (C++ ones in particular) emit useless
1542 SOs for non-existant .c files. We ignore all subsequent SOs
1543 that immediately follow the first. */
1547 pst
= start_psymtab (objfile
,
1549 first_so_symnum
* symbol_size
,
1550 objfile
->global_psymbols
.next
,
1551 objfile
->static_psymbols
.next
);
1552 pst
->dirname
= dirname_nso
;
1560 enum language tmp_language
;
1561 /* Add this bincl to the bincl_list for future EXCLs. No
1562 need to save the string; it'll be around until
1563 read_dbx_symtab function returns */
1565 namestring
= set_namestring (objfile
, &nlist
);
1566 tmp_language
= deduce_language_from_filename (namestring
);
1568 /* Only change the psymtab's language if we've learned
1569 something useful (eg. tmp_language is not language_unknown).
1570 In addition, to match what start_subfile does, never change
1572 if (tmp_language
!= language_unknown
1573 && (tmp_language
!= language_c
1574 || psymtab_language
!= language_cplus
))
1575 psymtab_language
= tmp_language
;
1579 /* FIXME: we should not get here without a PST to work on.
1580 Attempt to recover. */
1581 complaint (&symfile_complaints
,
1582 _("N_BINCL %s not in entries for any file, at symtab \
1584 namestring
, symnum
);
1587 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1589 /* Mark down an include file in the current psymtab */
1591 goto record_include_file
;
1596 enum language tmp_language
;
1597 /* Mark down an include file in the current psymtab */
1599 namestring
= set_namestring (objfile
, &nlist
);
1600 tmp_language
= deduce_language_from_filename (namestring
);
1602 /* Only change the psymtab's language if we've learned
1603 something useful (eg. tmp_language is not language_unknown).
1604 In addition, to match what start_subfile does, never change
1606 if (tmp_language
!= language_unknown
1607 && (tmp_language
!= language_c
1608 || psymtab_language
!= language_cplus
))
1609 psymtab_language
= tmp_language
;
1611 /* In C++, one may expect the same filename to come round many
1612 times, when code is coming alternately from the main file
1613 and from inline functions in other files. So I check to see
1614 if this is a file we've seen before -- either the main
1615 source file, or a previously included file.
1617 This seems to be a lot of time to be spending on N_SOL, but
1618 things like "break c-exp.y:435" need to work (I
1619 suppose the psymtab_include_list could be hashed or put
1620 in a binary tree, if profiling shows this is a major hog). */
1621 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
1625 for (i
= 0; i
< includes_used
; i
++)
1626 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
1635 record_include_file
:
1637 psymtab_include_list
[includes_used
++] = namestring
;
1638 if (includes_used
>= includes_allocated
)
1640 char **orig
= psymtab_include_list
;
1642 psymtab_include_list
= (char **)
1643 alloca ((includes_allocated
*= 2) * sizeof (char *));
1644 memcpy (psymtab_include_list
, orig
,
1645 includes_used
* sizeof (char *));
1649 case N_LSYM
: /* Typedef or automatic variable. */
1650 case N_STSYM
: /* Data seg var -- static */
1651 case N_LCSYM
: /* BSS " */
1652 case N_ROSYM
: /* Read-only data seg var -- static. */
1653 case N_NBSTS
: /* Gould nobase. */
1654 case N_NBLCS
: /* symbols. */
1656 case N_GSYM
: /* Global (extern) variable; can be
1657 data or bss (sigh FIXME). */
1659 /* Following may probably be ignored; I'll leave them here
1660 for now (until I do Pascal and Modula 2 extensions). */
1662 case N_PC
: /* I may or may not need this; I
1664 case N_M2C
: /* I suspect that I can ignore this here. */
1665 case N_SCOPE
: /* Same. */
1669 namestring
= set_namestring (objfile
, &nlist
);
1671 /* See if this is an end of function stab. */
1672 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1676 /* It's value is the size (in bytes) of the function for
1677 function relative stabs, or the address of the function's
1678 end for old style stabs. */
1679 valu
= nlist
.n_value
+ last_function_start
;
1680 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1681 pst
->texthigh
= valu
;
1685 p
= (char *) strchr (namestring
, ':');
1687 continue; /* Not a debugging symbol. */
1690 sym_name
= NULL
; /* pacify "gcc -Werror" */
1691 if (psymtab_language
== language_cplus
)
1693 char *new_name
, *name
= xmalloc (p
- namestring
+ 1);
1694 memcpy (name
, namestring
, p
- namestring
);
1695 name
[p
- namestring
] = '\0';
1696 new_name
= cp_canonicalize_string (name
);
1697 if (new_name
!= NULL
)
1699 sym_len
= strlen (new_name
);
1700 sym_name
= obsavestring (new_name
, sym_len
,
1701 &objfile
->objfile_obstack
);
1709 sym_name
= namestring
;
1710 sym_len
= p
- namestring
;
1713 /* Main processing section for debugging symbols which
1714 the initial read through the symbol tables needs to worry
1715 about. If we reach this point, the symbol which we are
1716 considering is definitely one we are interested in.
1717 p must also contain the (valid) index into the namestring
1718 which indicates the debugging type symbol. */
1723 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1726 if (gdbarch_static_transform_name_p (gdbarch
))
1727 namestring
= gdbarch_static_transform_name (gdbarch
,
1730 add_psymbol_to_list (sym_name
, sym_len
, 1,
1731 VAR_DOMAIN
, LOC_STATIC
,
1732 &objfile
->static_psymbols
,
1734 psymtab_language
, objfile
);
1738 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1740 /* The addresses in these entries are reported to be
1741 wrong. See the code that reads 'G's for symtabs. */
1742 add_psymbol_to_list (sym_name
, sym_len
, 1,
1743 VAR_DOMAIN
, LOC_STATIC
,
1744 &objfile
->global_psymbols
,
1746 psymtab_language
, objfile
);
1750 /* When a 'T' entry is defining an anonymous enum, it
1751 may have a name which is the empty string, or a
1752 single space. Since they're not really defining a
1753 symbol, those shouldn't go in the partial symbol
1754 table. We do pick up the elements of such enums at
1755 'check_enum:', below. */
1756 if (p
>= namestring
+ 2
1757 || (p
== namestring
+ 1
1758 && namestring
[0] != ' '))
1760 add_psymbol_to_list (sym_name
, sym_len
, 1,
1761 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1762 &objfile
->static_psymbols
,
1764 psymtab_language
, objfile
);
1767 /* Also a typedef with the same name. */
1768 add_psymbol_to_list (sym_name
, sym_len
, 1,
1769 VAR_DOMAIN
, LOC_TYPEDEF
,
1770 &objfile
->static_psymbols
,
1772 psymtab_language
, objfile
);
1779 if (p
!= namestring
) /* a name is there, not just :T... */
1781 add_psymbol_to_list (sym_name
, sym_len
, 1,
1782 VAR_DOMAIN
, LOC_TYPEDEF
,
1783 &objfile
->static_psymbols
,
1785 psymtab_language
, objfile
);
1788 /* If this is an enumerated type, we need to
1789 add all the enum constants to the partial symbol
1790 table. This does not cover enums without names, e.g.
1791 "enum {a, b} c;" in C, but fortunately those are
1792 rare. There is no way for GDB to find those from the
1793 enum type without spending too much time on it. Thus
1794 to solve this problem, the compiler needs to put out the
1795 enum in a nameless type. GCC2 does this. */
1797 /* We are looking for something of the form
1798 <name> ":" ("t" | "T") [<number> "="] "e"
1799 {<constant> ":" <value> ","} ";". */
1801 /* Skip over the colon and the 't' or 'T'. */
1803 /* This type may be given a number. Also, numbers can come
1804 in pairs like (0,26). Skip over it. */
1805 while ((*p
>= '0' && *p
<= '9')
1806 || *p
== '(' || *p
== ',' || *p
== ')'
1812 /* The aix4 compiler emits extra crud before the members. */
1815 /* Skip over the type (?). */
1819 /* Skip over the colon. */
1823 /* We have found an enumerated type. */
1824 /* According to comments in read_enum_type
1825 a comma could end it instead of a semicolon.
1826 I don't know where that happens.
1828 while (*p
&& *p
!= ';' && *p
!= ',')
1832 /* Check for and handle cretinous dbx symbol name
1834 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1835 p
= next_symbol_text (objfile
);
1837 /* Point to the character after the name
1838 of the enum constant. */
1839 for (q
= p
; *q
&& *q
!= ':'; q
++)
1841 /* Note that the value doesn't matter for
1842 enum constants in psymtabs, just in symtabs. */
1843 add_psymbol_to_list (p
, q
- p
, 1,
1844 VAR_DOMAIN
, LOC_CONST
,
1845 &objfile
->static_psymbols
, 0,
1846 0, psymtab_language
, objfile
);
1847 /* Point past the name. */
1849 /* Skip over the value. */
1850 while (*p
&& *p
!= ',')
1852 /* Advance past the comma. */
1860 /* Constant, e.g. from "const" in Pascal. */
1861 add_psymbol_to_list (sym_name
, sym_len
, 1,
1862 VAR_DOMAIN
, LOC_CONST
,
1863 &objfile
->static_psymbols
, nlist
.n_value
,
1864 0, psymtab_language
, objfile
);
1870 int name_len
= p
- namestring
;
1871 char *name
= xmalloc (name_len
+ 1);
1872 memcpy (name
, namestring
, name_len
);
1873 name
[name_len
] = '\0';
1874 function_outside_compilation_unit_complaint (name
);
1877 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1878 SECT_OFF_TEXT (objfile
));
1879 /* Kludges for ELF/STABS with Sun ACC */
1880 last_function_name
= namestring
;
1881 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1882 value for the bottom of the text seg in those cases. */
1883 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1884 SECT_OFF_TEXT (objfile
))
1885 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1887 CORE_ADDR minsym_valu
=
1888 find_stab_function_addr (namestring
,
1889 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);
1940 memcpy (name
, namestring
, name_len
);
1941 name
[name_len
] = '\0';
1942 function_outside_compilation_unit_complaint (name
);
1945 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1946 SECT_OFF_TEXT (objfile
));
1947 /* Kludges for ELF/STABS with Sun ACC */
1948 last_function_name
= namestring
;
1949 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1950 value for the bottom of the text seg in those cases. */
1951 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1952 SECT_OFF_TEXT (objfile
))
1953 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1955 CORE_ADDR minsym_valu
=
1956 find_stab_function_addr (namestring
,
1957 pst
? pst
->filename
: NULL
,
1959 /* find_stab_function_addr will return 0 if the minimal
1960 symbol wasn't found. (Unfortunately, this might also
1961 be a valid address.) Anyway, if it *does* return 0,
1962 it is likely that the value was set correctly to begin
1964 if (minsym_valu
!= 0)
1965 nlist
.n_value
= minsym_valu
;
1967 if (pst
&& textlow_not_set
1968 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1970 pst
->textlow
= nlist
.n_value
;
1971 textlow_not_set
= 0;
1975 /* Keep track of the start of the last function so we
1976 can handle end of function symbols. */
1977 last_function_start
= nlist
.n_value
;
1979 /* In reordered executables this function may lie outside
1980 the bounds created by N_SO symbols. If that's the case
1981 use the address of this function as the low bound for
1982 the partial symbol table. */
1985 || (nlist
.n_value
< pst
->textlow
1987 != ANOFFSET (objfile
->section_offsets
,
1988 SECT_OFF_TEXT (objfile
))))))
1990 pst
->textlow
= nlist
.n_value
;
1991 textlow_not_set
= 0;
1993 add_psymbol_to_list (sym_name
, sym_len
, 1,
1994 VAR_DOMAIN
, LOC_BLOCK
,
1995 &objfile
->global_psymbols
,
1997 psymtab_language
, objfile
);
2000 /* Two things show up here (hopefully); static symbols of
2001 local scope (static used inside braces) or extensions
2002 of structure symbols. We can ignore both. */
2016 case '#': /* for symbol identification (used in live ranges) */
2020 /* It is a C++ nested symbol. We don't need to record it
2021 (I don't think); if we try to look up foo::bar::baz,
2022 then symbols for the symtab containing foo should get
2023 read in, I think. */
2024 /* Someone says sun cc puts out symbols like
2025 /foo/baz/maclib::/usr/local/bin/maclib,
2026 which would get here with a symbol type of ':'. */
2030 /* Unexpected symbol descriptor. The second and subsequent stabs
2031 of a continued stab can show up here. The question is
2032 whether they ever can mimic a normal stab--it would be
2033 nice if not, since we certainly don't want to spend the
2034 time searching to the end of every string looking for
2037 complaint (&symfile_complaints
, _("unknown symbol descriptor `%c'"),
2040 /* Ignore it; perhaps it is an extension that we don't
2048 namestring
= set_namestring (objfile
, &nlist
);
2050 /* Find the corresponding bincl and mark that psymtab on the
2051 psymtab dependency list */
2053 struct partial_symtab
*needed_pst
=
2054 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2056 /* If this include file was defined earlier in this file,
2058 if (needed_pst
== pst
)
2066 for (i
= 0; i
< dependencies_used
; i
++)
2067 if (dependency_list
[i
] == needed_pst
)
2073 /* If it's already in the list, skip the rest. */
2077 dependency_list
[dependencies_used
++] = needed_pst
;
2078 if (dependencies_used
>= dependencies_allocated
)
2080 struct partial_symtab
**orig
= dependency_list
;
2082 (struct partial_symtab
**)
2083 alloca ((dependencies_allocated
*= 2)
2084 * sizeof (struct partial_symtab
*));
2085 memcpy (dependency_list
, orig
,
2087 * sizeof (struct partial_symtab
*)));
2089 fprintf_unfiltered (gdb_stderr
,
2090 "Had to reallocate dependency list.\n");
2091 fprintf_unfiltered (gdb_stderr
,
2092 "New dependencies allocated: %d\n",
2093 dependencies_allocated
);
2101 /* Solaris 2 end of module, finish current partial symbol table.
2102 end_psymtab will set pst->texthigh to the proper value, which
2103 is necessary if a module compiled without debugging info
2104 follows this module. */
2105 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
2107 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2108 symnum
* symbol_size
,
2110 dependency_list
, dependencies_used
, textlow_not_set
);
2111 pst
= (struct partial_symtab
*) 0;
2113 dependencies_used
= 0;
2114 has_line_numbers
= 0;
2120 HANDLE_RBRAC (nlist
.n_value
);
2126 case N_SSYM
: /* Claim: Structure or union element.
2127 Hopefully, I can ignore this. */
2128 case N_ENTRY
: /* Alternate entry point; can ignore. */
2129 case N_MAIN
: /* Can definitely ignore this. */
2130 case N_CATCH
: /* These are GNU C++ extensions */
2131 case N_EHDECL
: /* that can safely be ignored here. */
2141 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2142 case N_DEFD
: /* GNU Modula-2 */
2143 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2145 case N_OBJ
: /* useless types from Solaris */
2148 /* These symbols aren't interesting; don't worry about them */
2153 /* If we haven't found it yet, ignore it. It's probably some
2154 new type we don't know about yet. */
2155 unknown_symtype_complaint (hex_string (nlist
.n_type
));
2160 /* If there's stuff to be cleaned up, clean it up. */
2163 /* Don't set pst->texthigh lower than it already is. */
2164 CORE_ADDR text_end
=
2165 (lowest_text_address
== (CORE_ADDR
) -1
2166 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
2167 SECT_OFF_TEXT (objfile
)))
2168 : lowest_text_address
)
2171 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2172 symnum
* symbol_size
,
2173 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2174 dependency_list
, dependencies_used
, textlow_not_set
);
2177 do_cleanups (back_to
);
2180 /* Allocate and partially fill a partial symtab. It will be
2181 completely filled at the end of the symbol list.
2183 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2184 is the address relative to which its symbols are (incremental) or 0
2187 static struct partial_symtab
*
2188 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2189 int ldsymoff
, struct partial_symbol
**global_syms
,
2190 struct partial_symbol
**static_syms
)
2192 struct partial_symtab
*result
=
2193 start_psymtab_common (objfile
, objfile
->section_offsets
,
2194 filename
, textlow
, global_syms
, static_syms
);
2196 result
->read_symtab_private
= (char *)
2197 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
2198 LDSYMOFF (result
) = ldsymoff
;
2199 result
->read_symtab
= dbx_psymtab_to_symtab
;
2200 SYMBOL_SIZE (result
) = symbol_size
;
2201 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2202 STRING_OFFSET (result
) = string_table_offset
;
2203 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2206 /* If we're handling an ELF file, drag some section-relocation info
2207 for this source file out of the ELF symbol table, to compensate for
2208 Sun brain death. This replaces the section_offsets in this psymtab,
2210 elfstab_offset_sections (objfile
, result
);
2213 /* Deduce the source language from the filename for this psymtab. */
2214 psymtab_language
= deduce_language_from_filename (filename
);
2219 /* Close off the current usage of PST.
2220 Returns PST or NULL if the partial symtab was empty and thrown away.
2222 FIXME: List variables and peculiarities of same. */
2224 struct partial_symtab
*
2225 end_psymtab (struct partial_symtab
*pst
, char **include_list
, int num_includes
,
2226 int capping_symbol_offset
, CORE_ADDR capping_text
,
2227 struct partial_symtab
**dependency_list
, int number_dependencies
,
2228 int textlow_not_set
)
2231 struct objfile
*objfile
= pst
->objfile
;
2232 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2234 if (capping_symbol_offset
!= -1)
2235 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2236 pst
->texthigh
= capping_text
;
2238 /* Under Solaris, the N_SO symbols always have a value of 0,
2239 instead of the usual address of the .o file. Therefore,
2240 we have to do some tricks to fill in texthigh and textlow.
2241 The first trick is: if we see a static
2242 or global function, and the textlow for the current pst
2243 is not set (ie: textlow_not_set), then we use that function's
2244 address for the textlow of the pst. */
2246 /* Now, to fill in texthigh, we remember the last function seen
2247 in the .o file. Also, there's a hack in
2248 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2249 to here via the misc_info field. Therefore, we can fill in
2250 a reliable texthigh by taking the address plus size of the
2251 last function in the file. */
2253 if (pst
->texthigh
== 0 && last_function_name
2254 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2258 struct minimal_symbol
*minsym
;
2260 p
= strchr (last_function_name
, ':');
2262 p
= last_function_name
;
2263 n
= p
- last_function_name
;
2265 strncpy (p
, last_function_name
, n
);
2268 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2271 /* Sun Fortran appends an underscore to the minimal symbol name,
2272 try again with an appended underscore if the minimal symbol
2276 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2280 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
2282 last_function_name
= NULL
;
2285 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2287 /* this test will be true if the last .o file is only data */
2288 else if (textlow_not_set
)
2289 pst
->textlow
= pst
->texthigh
;
2292 struct partial_symtab
*p1
;
2294 /* If we know our own starting text address, then walk through all other
2295 psymtabs for this objfile, and if any didn't know their ending text
2296 address, set it to our starting address. Take care to not set our
2297 own ending address to our starting address, nor to set addresses on
2298 `dependency' files that have both textlow and texthigh zero. */
2300 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2302 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2304 p1
->texthigh
= pst
->textlow
;
2305 /* if this file has only data, then make textlow match texthigh */
2306 if (p1
->textlow
== 0)
2307 p1
->textlow
= p1
->texthigh
;
2312 /* End of kludge for patching Solaris textlow and texthigh. */
2314 pst
->n_global_syms
=
2315 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
2316 + pst
->globals_offset
);
2317 pst
->n_static_syms
=
2318 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
2319 + pst
->statics_offset
);
2321 pst
->number_of_dependencies
= number_dependencies
;
2322 if (number_dependencies
)
2324 pst
->dependencies
= (struct partial_symtab
**)
2325 obstack_alloc (&objfile
->objfile_obstack
,
2326 number_dependencies
* sizeof (struct partial_symtab
*));
2327 memcpy (pst
->dependencies
, dependency_list
,
2328 number_dependencies
* sizeof (struct partial_symtab
*));
2331 pst
->dependencies
= 0;
2333 for (i
= 0; i
< num_includes
; i
++)
2335 struct partial_symtab
*subpst
=
2336 allocate_psymtab (include_list
[i
], objfile
);
2338 /* Copy the sesction_offsets array from the main psymtab. */
2339 subpst
->section_offsets
= pst
->section_offsets
;
2340 subpst
->read_symtab_private
=
2341 (char *) obstack_alloc (&objfile
->objfile_obstack
,
2342 sizeof (struct symloc
));
2346 subpst
->texthigh
= 0;
2348 /* We could save slight bits of space by only making one of these,
2349 shared by the entire set of include files. FIXME-someday. */
2350 subpst
->dependencies
= (struct partial_symtab
**)
2351 obstack_alloc (&objfile
->objfile_obstack
,
2352 sizeof (struct partial_symtab
*));
2353 subpst
->dependencies
[0] = pst
;
2354 subpst
->number_of_dependencies
= 1;
2356 subpst
->globals_offset
=
2357 subpst
->n_global_syms
=
2358 subpst
->statics_offset
=
2359 subpst
->n_static_syms
= 0;
2363 subpst
->read_symtab
= pst
->read_symtab
;
2366 sort_pst_symbols (pst
);
2368 /* If there is already a psymtab or symtab for a file of this name, remove it.
2369 (If there is a symtab, more drastic things also happen.)
2370 This happens in VxWorks. */
2371 free_named_symtabs (pst
->filename
);
2373 if (num_includes
== 0
2374 && number_dependencies
== 0
2375 && pst
->n_global_syms
== 0
2376 && pst
->n_static_syms
== 0
2377 && has_line_numbers
== 0)
2379 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2380 it is on the obstack, but we can forget to chain it on the list. */
2381 /* Empty psymtabs happen as a result of header files which don't have
2382 any symbols in them. There can be a lot of them. But this check
2383 is wrong, in that a psymtab with N_SLINE entries but nothing else
2384 is not empty, but we don't realize that. Fixing that without slowing
2385 things down might be tricky. */
2387 discard_psymtab (pst
);
2389 /* Indicate that psymtab was thrown away. */
2390 pst
= (struct partial_symtab
*) NULL
;
2396 dbx_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2398 struct cleanup
*old_chain
;
2406 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. \
2407 Shouldn't happen.\n",
2412 /* Read in all partial symtabs on which this one is dependent */
2413 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2414 if (!pst
->dependencies
[i
]->readin
)
2416 /* Inform about additional files that need to be read in. */
2419 fputs_filtered (" ", gdb_stdout
);
2421 fputs_filtered ("and ", gdb_stdout
);
2423 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2424 wrap_here (""); /* Flush output */
2425 gdb_flush (gdb_stdout
);
2427 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2430 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy */
2432 /* Init stuff necessary for reading in symbols */
2435 old_chain
= make_cleanup (really_free_pendings
, 0);
2436 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2437 symbol_size
= SYMBOL_SIZE (pst
);
2439 /* Read in this file's symbols */
2440 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2441 read_ofile_symtab (pst
);
2443 do_cleanups (old_chain
);
2449 /* Read in all of the symbols for a given psymtab for real.
2450 Be verbose about it if the user wants that. */
2453 dbx_psymtab_to_symtab (struct partial_symtab
*pst
)
2456 struct cleanup
*back_to
= NULL
;
2463 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. \
2464 Shouldn't happen.\n",
2469 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
2471 /* Print the message now, before reading the string table,
2472 to avoid disconcerting pauses. */
2475 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2476 gdb_flush (gdb_stdout
);
2479 sym_bfd
= pst
->objfile
->obfd
;
2481 next_symbol_text_func
= dbx_next_symbol_text
;
2483 if (DBX_STAB_SECTION (pst
->objfile
))
2486 = symfile_relocate_debug_section (pst
->objfile
->obfd
,
2487 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 current_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
2674 /* Global symbol: see if we came across a dbx defintion for
2675 a corresponding symbol. If so, store the value. Remove
2676 syms from the chain when their values are stored, but
2677 search the whole chain, as there may be several syms from
2678 different files with the same name. */
2679 /* This is probably not true. Since the files will be read
2680 in one at a time, each reference to a global symbol will
2681 be satisfied in each file as it appears. So we skip this
2687 /* In a Solaris elf file, this variable, which comes from the
2688 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2689 which comes from pst->textlow is correct. */
2690 if (last_source_start_addr
== 0)
2691 last_source_start_addr
= text_offset
;
2693 /* In reordered executables last_source_start_addr may not be the
2694 lower bound for this symtab, instead use text_offset which comes
2695 from pst->textlow which is correct. */
2696 if (last_source_start_addr
> text_offset
)
2697 last_source_start_addr
= text_offset
;
2699 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
,
2700 SECT_OFF_TEXT (objfile
));
2704 current_objfile
= NULL
;
2708 /* This handles a single symbol from the symbol-file, building symbols
2709 into a GDB symtab. It takes these arguments and an implicit argument.
2711 TYPE is the type field of the ".stab" symbol entry.
2712 DESC is the desc field of the ".stab" entry.
2713 VALU is the value field of the ".stab" entry.
2714 NAME is the symbol name, in our address space.
2715 SECTION_OFFSETS is a set of amounts by which the sections of this
2716 object file were relocated when it was loaded into memory. Note
2717 that these section_offsets are not the objfile->section_offsets but
2718 the pst->section_offsets. All symbols that refer to memory
2719 locations need to be offset by these amounts.
2720 OBJFILE is the object file from which we are reading symbols. It
2721 is used in end_symtab. */
2724 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2725 struct section_offsets
*section_offsets
,
2726 struct objfile
*objfile
)
2728 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2729 struct context_stack
*new;
2730 /* This remembers the address of the start of a function. It is
2731 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2732 are relative to the current function's start address. On systems
2733 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2734 and is used to relocate these symbol types rather than
2736 static CORE_ADDR function_start_offset
;
2738 /* This holds the address of the start of a function, without the
2739 system peculiarities of function_start_offset. */
2740 static CORE_ADDR last_function_start
;
2742 /* If this is nonzero, we've seen an N_SLINE since the start of the
2743 current function. We use this to tell us to move the first sline
2744 to the beginning of the function regardless of what its given
2746 static int sline_found_in_function
= 1;
2748 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2749 source file. Used to detect the SunPRO solaris compiler. */
2750 static int n_opt_found
;
2752 /* The stab type used for the definition of the last function.
2753 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2754 static int function_stab_type
= 0;
2756 if (!block_address_function_relative
)
2758 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2759 function start address, so just use the text offset. */
2760 function_start_offset
=
2761 ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2764 /* Something is wrong if we see real data before seeing a source
2767 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
2769 /* Ignore any symbols which appear before an N_SO symbol.
2770 Currently no one puts symbols there, but we should deal
2771 gracefully with the case. A complain()t might be in order,
2772 but this should not be an error (). */
2781 if (*name
== '\000')
2783 /* This N_FUN marks the end of a function. This closes off
2784 the current block. */
2785 struct block
*block
;
2787 if (context_stack_depth
<= 0)
2789 lbrac_mismatch_complaint (symnum
);
2793 /* The following check is added before recording line 0 at
2794 end of function so as to handle hand-generated stabs
2795 which may have an N_FUN stabs at the end of the function,
2796 but no N_SLINE stabs. */
2797 if (sline_found_in_function
)
2799 CORE_ADDR addr
= last_function_start
+ valu
;
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 new = 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 symbols which have \
2887 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
;
3020 record_line (current_subfile
, desc
,
3021 gdbarch_addr_bits_remove (gdbarch
, addr
));
3022 sline_found_in_function
= 1;
3025 record_line (current_subfile
, desc
,
3026 gdbarch_addr_bits_remove (gdbarch
, valu
));
3030 common_block_start (name
, objfile
);
3034 common_block_end (objfile
);
3037 /* The following symbol types need to have the appropriate
3038 offset added to their value; then we process symbol
3039 definitions in the name. */
3041 case N_STSYM
: /* Static symbol in data segment. */
3042 case N_LCSYM
: /* Static symbol in BSS segment. */
3043 case N_ROSYM
: /* Static symbol in read-only data segment. */
3044 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3045 Solaris 2's stabs-in-elf makes *most* symbols relative but
3046 leaves a few absolute (at least for Solaris 2.1 and version
3047 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3048 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3049 relocates it) .stab "foo:V...",N_STSYM is relative (section
3050 base subtracted). This leaves us no choice but to search for
3051 the 'S' or 'V'... (or pass the whole section_offsets stuff
3052 down ONE MORE function call level, which we really don't want
3057 /* Normal object file and NLMs have non-zero text seg offsets,
3058 but don't need their static syms offset in this fashion.
3059 XXX - This is really a crock that should be fixed in the
3060 solib handling code so that I don't have to work around it
3063 if (!symfile_relocatable
)
3065 p
= strchr (name
, ':');
3066 if (p
!= 0 && p
[1] == 'S')
3068 /* The linker relocated it. We don't want to add an
3069 elfstab_offset_sections-type offset, but we *do*
3070 want to add whatever solib.c passed to
3071 symbol_file_add as addr (this is known to affect
3072 SunOS 4, and I suspect ELF too). Since
3073 elfstab_offset_sections currently does not muck
3074 with the text offset (there is no Ttext.text
3075 symbol), we can get addr from the text offset. If
3076 elfstab_offset_sections ever starts dealing with
3077 the text offset, and we still need to do this, we
3078 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3079 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3080 goto define_a_symbol
;
3083 /* Since it's not the kludge case, re-dispatch to the right
3094 internal_error (__FILE__
, __LINE__
,
3095 _("failed internal consistency check"));
3099 case_N_STSYM
: /* Static symbol in data segment. */
3100 case N_DSLINE
: /* Source line number, data segment. */
3101 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3102 goto define_a_symbol
;
3104 case_N_LCSYM
: /* Static symbol in BSS segment. */
3105 case N_BSLINE
: /* Source line number, BSS segment. */
3106 /* N_BROWS: overlaps with N_BSLINE. */
3107 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3108 goto define_a_symbol
;
3110 case_N_ROSYM
: /* Static symbol in read-only data segment. */
3111 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3112 goto define_a_symbol
;
3114 case N_ENTRY
: /* Alternate entry point. */
3115 /* Relocate for dynamic loading. */
3116 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3117 goto define_a_symbol
;
3119 /* The following symbol types we don't know how to process.
3120 Handle them in a "default" way, but complain to people who
3123 case N_CATCH
: /* Exception handler catcher. */
3124 case N_EHDECL
: /* Exception handler name. */
3125 case N_PC
: /* Global symbol in Pascal. */
3126 case N_M2C
: /* Modula-2 compilation unit. */
3127 /* N_MOD2: overlaps with N_EHDECL. */
3128 case N_SCOPE
: /* Modula-2 scope information. */
3129 case N_ECOML
: /* End common (local name). */
3130 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3135 unknown_symtype_complaint (hex_string (type
));
3138 /* The following symbol types don't need the address field
3139 relocated, since it is either unused, or is absolute. */
3141 case N_GSYM
: /* Global variable. */
3142 case N_NSYMS
: /* Number of symbols (Ultrix). */
3143 case N_NOMAP
: /* No map? (Ultrix). */
3144 case N_RSYM
: /* Register variable. */
3145 case N_DEFD
: /* Modula-2 GNU module dependency. */
3146 case N_SSYM
: /* Struct or union element. */
3147 case N_LSYM
: /* Local symbol in stack. */
3148 case N_PSYM
: /* Parameter variable. */
3149 case N_LENG
: /* Length of preceding symbol type. */
3153 char *colon_pos
= strchr (name
, ':');
3154 if (colon_pos
== NULL
)
3157 deftype
= colon_pos
[1];
3163 function_stab_type
= type
;
3165 /* Deal with the SunPRO 3.0 compiler which omits the
3166 address from N_FUN symbols. */
3168 && valu
== ANOFFSET (section_offsets
,
3169 SECT_OFF_TEXT (objfile
))
3170 && gdbarch_sofun_address_maybe_missing (gdbarch
))
3172 CORE_ADDR minsym_valu
=
3173 find_stab_function_addr (name
, last_source_file
, objfile
);
3175 /* The function find_stab_function_addr will return
3176 0 if the minimal symbol wasn't found.
3177 (Unfortunately, this might also be a valid
3178 address.) Anyway, if it *does* return 0, it is
3179 likely that the value was set correctly to begin
3181 if (minsym_valu
!= 0)
3185 if (block_address_function_relative
)
3186 /* For Solaris 2 compilers, the block addresses and
3187 N_SLINE's are relative to the start of the
3188 function. On normal systems, and when using GCC on
3189 Solaris 2, these addresses are just absolute, or
3190 relative to the N_SO, depending on
3191 BLOCK_ADDRESS_ABSOLUTE. */
3192 function_start_offset
= valu
;
3194 within_function
= 1;
3196 if (context_stack_depth
> 1)
3198 complaint (&symfile_complaints
,
3199 _("unmatched N_LBRAC before symtab pos %d"),
3204 if (context_stack_depth
> 0)
3206 struct block
*block
;
3208 new = pop_context ();
3209 /* Make a block for the local symbols within. */
3210 block
= finish_block (new->name
, &local_symbols
,
3211 new->old_blocks
, new->start_addr
,
3214 /* For C++, set the block's scope. */
3215 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
3216 cp_set_block_scope (new->name
, block
,
3217 &objfile
->objfile_obstack
,
3221 new = push_context (0, valu
);
3222 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3226 define_symbol (valu
, name
, desc
, type
, objfile
);
3232 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3233 for a bunch of other flags, too. Someday we may parse their
3234 flags; for now we ignore theirs and hope they'll ignore ours. */
3235 case N_OPT
: /* Solaris 2: Compiler options. */
3238 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3240 processing_gcc_compilation
= 2;
3241 #if 0 /* Works, but is experimental. -fnf */
3242 /* For now, stay with AUTO_DEMANGLING for g++ output, as
3243 we don't know whether it will use the old style or v3
3245 if (AUTO_DEMANGLING
)
3247 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
3256 case N_MAIN
: /* Name of main routine. */
3257 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3258 it with a symbol file with "main" and without N_MAIN. I'm
3259 not sure exactly what rule to follow but probably something
3260 like: N_MAIN takes precedence over "main" no matter what
3261 objfile it is in; If there is more than one N_MAIN, choose
3262 the one in the symfile_objfile; If there is more than one
3263 N_MAIN within a given objfile, complain() and choose
3264 arbitrarily. (kingdon) */
3266 set_main_name (name
);
3269 /* The following symbol types can be ignored. */
3270 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3271 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3272 /* N_UNDF: Solaris 2: File separator mark. */
3273 /* N_UNDF: -- we will never encounter it, since we only process
3274 one file's symbols at once. */
3275 case N_ENDM
: /* Solaris 2: End of module. */
3276 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3280 /* '#' is a GNU C extension to allow one symbol to refer to another
3283 Generally this is used so that an alias can refer to its main
3287 /* Initialize symbol reference names and determine if this is a
3288 definition. If a symbol reference is being defined, go ahead
3289 and add it. Otherwise, just return. */
3294 /* If this stab defines a new reference ID that is not on the
3295 reference list, then put it on the reference list.
3297 We go ahead and advance NAME past the reference, even though
3298 it is not strictly necessary at this time. */
3299 refnum
= symbol_reference_defined (&s
);
3301 if (!ref_search (refnum
))
3302 ref_add (refnum
, 0, name
, valu
);
3306 previous_stab_code
= type
;
3309 /* FIXME: The only difference between this and elfstab_build_psymtabs
3310 is the call to install_minimal_symbols for elf, and the support for
3311 split sections. If the differences are really that small, the code
3312 should be shared. */
3314 /* Scan and build partial symbols for an coff symbol file.
3315 The coff file has already been processed to get its minimal symbols.
3317 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3320 OBJFILE is the object file we are reading symbols from.
3321 ADDR is the address relative to which the symbols are (e.g.
3322 the base address of the text segment).
3323 MAINLINE is true if we are reading the main symbol
3324 table (as opposed to a shared lib or dynamically loaded file).
3325 TEXTADDR is the address of the text section.
3326 TEXTSIZE is the size of the text section.
3327 STABSECTS is the list of .stab sections in OBJFILE.
3328 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3329 .stabstr section exists.
3331 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3332 adjusted for coff details. */
3335 coffstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3336 CORE_ADDR textaddr
, unsigned int textsize
,
3337 struct stab_section_list
*stabsects
,
3338 file_ptr stabstroffset
, unsigned int stabstrsize
)
3341 bfd
*sym_bfd
= objfile
->obfd
;
3342 char *name
= bfd_get_filename (sym_bfd
);
3343 struct dbx_symfile_info
*info
;
3344 unsigned int stabsize
;
3346 /* There is already a dbx_symfile_info allocated by our caller.
3347 It might even contain some info from the coff symtab to help us. */
3348 info
= objfile
->deprecated_sym_stab_info
;
3350 DBX_TEXT_ADDR (objfile
) = textaddr
;
3351 DBX_TEXT_SIZE (objfile
) = textsize
;
3353 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3354 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3355 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3357 if (stabstrsize
> bfd_get_size (sym_bfd
))
3358 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3359 DBX_STRINGTAB (objfile
) = (char *)
3360 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3361 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3363 /* Now read in the string table in one big gulp. */
3365 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3367 perror_with_name (name
);
3368 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3369 if (val
!= stabstrsize
)
3370 perror_with_name (name
);
3372 stabsread_new_init ();
3373 buildsym_new_init ();
3374 free_header_files ();
3375 init_header_files ();
3377 processing_acc_compilation
= 1;
3379 /* In a coff file, we've already installed the minimal symbols that came
3380 from the coff (non-stab) symbol table, so always act like an
3381 incremental load here. */
3382 if (stabsects
->next
== NULL
)
3384 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3385 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3386 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3390 struct stab_section_list
*stabsect
;
3392 DBX_SYMCOUNT (objfile
) = 0;
3393 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3395 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3396 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3399 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3401 symbuf_sections
= stabsects
->next
;
3402 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3406 dbx_symfile_read (objfile
, 0);
3409 /* Scan and build partial symbols for an ELF symbol file.
3410 This ELF file has already been processed to get its minimal symbols.
3412 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3415 OBJFILE is the object file we are reading symbols from.
3416 ADDR is the address relative to which the symbols are (e.g.
3417 the base address of the text segment).
3418 MAINLINE is true if we are reading the main symbol
3419 table (as opposed to a shared lib or dynamically loaded file).
3420 STABSECT is the BFD section information for the .stab section.
3421 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3422 .stabstr section exists.
3424 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3425 adjusted for elf details. */
3428 elfstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3430 file_ptr stabstroffset
, unsigned int stabstrsize
)
3433 bfd
*sym_bfd
= objfile
->obfd
;
3434 char *name
= bfd_get_filename (sym_bfd
);
3435 struct dbx_symfile_info
*info
;
3436 struct cleanup
*back_to
= NULL
;
3438 /* There is already a dbx_symfile_info allocated by our caller.
3439 It might even contain some info from the ELF symtab to help us. */
3440 info
= objfile
->deprecated_sym_stab_info
;
3442 /* Find the first and last text address. dbx_symfile_read seems to
3444 find_text_range (sym_bfd
, objfile
);
3446 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3447 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3448 DBX_SYMCOUNT (objfile
)
3449 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3450 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3451 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3452 DBX_STAB_SECTION (objfile
) = stabsect
;
3454 if (stabstrsize
> bfd_get_size (sym_bfd
))
3455 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3456 DBX_STRINGTAB (objfile
) = (char *)
3457 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3458 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3460 /* Now read in the string table in one big gulp. */
3462 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3464 perror_with_name (name
);
3465 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3466 if (val
!= stabstrsize
)
3467 perror_with_name (name
);
3469 stabsread_new_init ();
3470 buildsym_new_init ();
3471 free_header_files ();
3472 init_header_files ();
3474 processing_acc_compilation
= 1;
3477 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3478 stabs_data
= symfile_relocate_debug_section (objfile
->obfd
, stabsect
, NULL
);
3480 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
3482 /* In an elf file, we've already installed the minimal symbols that came
3483 from the elf (non-stab) symbol table, so always act like an
3484 incremental load here. dbx_symfile_read should not generate any new
3485 minimal symbols, since we will have already read the ELF dynamic symbol
3486 table and normal symbol entries won't be in the ".stab" section; but in
3487 case it does, it will install them itself. */
3488 dbx_symfile_read (objfile
, 0);
3491 do_cleanups (back_to
);
3494 /* Scan and build partial symbols for a file with special sections for stabs
3495 and stabstrings. The file has already been processed to get its minimal
3496 symbols, and any other symbols that might be necessary to resolve GSYMs.
3498 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3501 OBJFILE is the object file we are reading symbols from.
3502 ADDR is the address relative to which the symbols are (e.g. the base address
3503 of the text segment).
3504 MAINLINE is true if we are reading the main symbol table (as opposed to a
3505 shared lib or dynamically loaded file).
3506 STAB_NAME is the name of the section that contains the stabs.
3507 STABSTR_NAME is the name of the section that contains the stab strings.
3509 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3512 stabsect_build_psymtabs (struct objfile
*objfile
, int mainline
, char *stab_name
,
3513 char *stabstr_name
, char *text_name
)
3516 bfd
*sym_bfd
= objfile
->obfd
;
3517 char *name
= bfd_get_filename (sym_bfd
);
3519 asection
*stabstrsect
;
3520 asection
*text_sect
;
3522 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3523 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3529 error (_("stabsect_build_psymtabs: Found stabs (%s), but not string \
3531 stab_name
, stabstr_name
);
3533 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
3534 xmalloc (sizeof (struct dbx_symfile_info
));
3535 memset (objfile
->deprecated_sym_stab_info
, 0,
3536 sizeof (struct dbx_symfile_info
));
3538 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3540 error (_("Can't find %s section in symbol file"), text_name
);
3541 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3542 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3544 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3545 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3546 / DBX_SYMBOL_SIZE (objfile
);
3547 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3548 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3550 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3551 error (_("ridiculous string table size: %d bytes"),
3552 DBX_STRINGTAB_SIZE (objfile
));
3553 DBX_STRINGTAB (objfile
) = (char *)
3554 obstack_alloc (&objfile
->objfile_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
3555 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3557 /* Now read in the string table in one big gulp. */
3559 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3560 stabstrsect
, /* bfd section */
3561 DBX_STRINGTAB (objfile
), /* input buffer */
3562 0, /* offset into section */
3563 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
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 struct sym_fns aout_sym_fns
=
3581 bfd_target_aout_flavour
,
3582 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
3583 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
3584 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
3585 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
3586 default_symfile_offsets
, /* sym_offsets: parse user's offsets to
3588 default_symfile_segments
, /* sym_segments: Get segment information from
3590 NULL
, /* sym_read_linetable */
3591 NULL
/* next: pointer to next struct sym_fns */
3595 _initialize_dbxread (void)
3597 add_symtab_fns (&aout_sym_fns
);