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.
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
= savestring (name
, strlen (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 (((unsigned) nlist
->n_strx
+ file_string_table_offset
)
969 >= DBX_STRINGTAB_SIZE (objfile
))
971 complaint (&symfile_complaints
, _("bad string table offset in symbol %d"),
973 namestring
= "<bad string table offset>";
976 namestring
= (nlist
->n_strx
+ file_string_table_offset
977 + DBX_STRINGTAB (objfile
));
981 /* Scan a SunOs dynamic symbol table for symbols of interest and
982 add them to the minimal symbol table. */
985 read_dbx_dynamic_symtab (struct objfile
*objfile
)
987 bfd
*abfd
= objfile
->obfd
;
988 struct cleanup
*back_to
;
1001 /* Check that the symbol file has dynamic symbols that we know about.
1002 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1003 on a sun4 host (and vice versa) and bfd is not configured
1004 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1005 so we ignore the dynamic symbols in this case. */
1006 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1007 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1008 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1011 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1012 if (dynsym_size
< 0)
1015 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1016 back_to
= make_cleanup (xfree
, dynsyms
);
1018 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1019 if (dynsym_count
< 0)
1021 do_cleanups (back_to
);
1025 /* Enter dynamic symbols into the minimal symbol table
1026 if this is a stripped executable. */
1027 if (bfd_get_symcount (abfd
) <= 0)
1030 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1032 asymbol
*sym
= *symptr
;
1036 sec
= bfd_get_section (sym
);
1038 /* BFD symbols are section relative. */
1039 sym_value
= sym
->value
+ sec
->vma
;
1041 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1043 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1044 SECT_OFF_TEXT (objfile
));
1047 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1049 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1050 SECT_OFF_DATA (objfile
));
1053 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1055 sym_value
+= ANOFFSET (objfile
->section_offsets
,
1056 SECT_OFF_BSS (objfile
));
1062 if (sym
->flags
& BSF_GLOBAL
)
1065 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1070 /* Symbols from shared libraries have a dynamic relocation entry
1071 that points to the associated slot in the procedure linkage table.
1072 We make a mininal symbol table entry with type mst_solib_trampoline
1073 at the address in the procedure linkage table. */
1074 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1075 if (dynrel_size
< 0)
1077 do_cleanups (back_to
);
1081 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1082 make_cleanup (xfree
, dynrels
);
1084 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1085 if (dynrel_count
< 0)
1087 do_cleanups (back_to
);
1091 for (counter
= 0, relptr
= dynrels
;
1092 counter
< dynrel_count
;
1093 counter
++, relptr
++)
1095 arelent
*rel
= *relptr
;
1097 rel
->address
+ ANOFFSET (objfile
->section_offsets
,
1098 SECT_OFF_DATA (objfile
));
1100 switch (bfd_get_arch (abfd
))
1102 case bfd_arch_sparc
:
1103 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1107 /* `16' is the type BFD produces for a jump table relocation. */
1108 if (rel
->howto
->type
!= 16)
1111 /* Adjust address in the jump table to point to
1112 the start of the bsr instruction. */
1119 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1120 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1124 do_cleanups (back_to
);
1128 find_stab_function_addr (char *namestring
, char *filename
,
1129 struct objfile
*objfile
)
1131 struct minimal_symbol
*msym
;
1135 p
= strchr (namestring
, ':');
1140 strncpy (p
, namestring
, n
);
1143 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1146 /* Sun Fortran appends an underscore to the minimal symbol name,
1147 try again with an appended underscore if the minimal symbol
1151 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1154 if (msym
== NULL
&& filename
!= NULL
)
1156 /* Try again without the filename. */
1158 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1160 if (msym
== NULL
&& filename
!= NULL
)
1162 /* And try again for Sun Fortran, but without the filename. */
1165 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1168 return msym
== NULL
? 0 : SYMBOL_VALUE_ADDRESS (msym
);
1172 function_outside_compilation_unit_complaint (const char *arg1
)
1174 complaint (&symfile_complaints
,
1175 _("function `%s' appears to be defined outside of all compilation \
1180 /* Setup partial_symtab's describing each source file for which
1181 debugging information is available. */
1184 read_dbx_symtab (struct objfile
*objfile
)
1186 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1187 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1188 struct internal_nlist nlist
;
1189 CORE_ADDR text_addr
;
1194 int past_first_source_file
= 0;
1195 CORE_ADDR last_o_file_start
= 0;
1196 CORE_ADDR last_function_start
= 0;
1197 struct cleanup
*back_to
;
1199 int textlow_not_set
;
1200 int data_sect_index
;
1202 /* Current partial symtab */
1203 struct partial_symtab
*pst
;
1205 /* List of current psymtab's include files */
1206 char **psymtab_include_list
;
1207 int includes_allocated
;
1210 /* Index within current psymtab dependency list */
1211 struct partial_symtab
**dependency_list
;
1212 int dependencies_used
, dependencies_allocated
;
1214 text_addr
= DBX_TEXT_ADDR (objfile
);
1215 text_size
= DBX_TEXT_SIZE (objfile
);
1217 /* FIXME. We probably want to change stringtab_global rather than add this
1218 while processing every symbol entry. FIXME. */
1219 file_string_table_offset
= 0;
1220 next_file_string_table_offset
= 0;
1222 stringtab_global
= DBX_STRINGTAB (objfile
);
1224 pst
= (struct partial_symtab
*) 0;
1226 includes_allocated
= 30;
1228 psymtab_include_list
= (char **) alloca (includes_allocated
*
1231 dependencies_allocated
= 30;
1232 dependencies_used
= 0;
1234 (struct partial_symtab
**) alloca (dependencies_allocated
*
1235 sizeof (struct partial_symtab
*));
1237 /* Init bincl list */
1238 init_bincl_list (20, objfile
);
1239 back_to
= make_cleanup_free_bincl_list (objfile
);
1241 last_source_file
= NULL
;
1243 lowest_text_address
= (CORE_ADDR
) -1;
1245 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1246 abfd
= objfile
->obfd
;
1247 symbuf_end
= symbuf_idx
= 0;
1248 next_symbol_text_func
= dbx_next_symbol_text
;
1249 textlow_not_set
= 1;
1250 has_line_numbers
= 0;
1252 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1253 to global and static variables. The stab for a global or static
1254 variable doesn't give us any indication of which section it's in,
1255 so we can't tell immediately which offset in
1256 objfile->section_offsets we should apply to the variable's
1259 We could certainly find out which section contains the variable
1260 by looking up the variable's unrelocated address with
1261 find_pc_section, but that would be expensive; this is the
1262 function that constructs the partial symbol tables by examining
1263 every symbol in the entire executable, and it's
1264 performance-critical. So that expense would not be welcome. I'm
1265 not sure what to do about this at the moment.
1267 What we have done for years is to simply assume that the .data
1268 section's offset is appropriate for all global and static
1269 variables. Recently, this was expanded to fall back to the .bss
1270 section's offset if there is no .data section, and then to the
1271 .rodata section's offset. */
1272 data_sect_index
= objfile
->sect_index_data
;
1273 if (data_sect_index
== -1)
1274 data_sect_index
= SECT_OFF_BSS (objfile
);
1275 if (data_sect_index
== -1)
1276 data_sect_index
= SECT_OFF_RODATA (objfile
);
1278 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1279 for the file to have no .data, no .bss, and no .text at all, if
1280 it also has no global or static variables. If it does, we will
1281 get an internal error from an ANOFFSET macro below when we try to
1282 use data_sect_index. */
1284 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1286 /* Get the symbol for this run and pull out some info */
1287 QUIT
; /* allow this to be interruptable */
1288 if (symbuf_idx
== symbuf_end
)
1290 bufp
= &symbuf
[symbuf_idx
++];
1293 * Special case to speed up readin.
1295 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1297 has_line_numbers
= 1;
1301 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1302 OBJSTAT (objfile
, n_stabs
++);
1304 /* Ok. There is a lot of code duplicated in the rest of this
1305 switch statement (for efficiency reasons). Since I don't
1306 like duplicating code, I will do my penance here, and
1307 describe the code which is duplicated:
1309 *) The assignment to namestring.
1310 *) The call to strchr.
1311 *) The addition of a partial symbol the the two partial
1312 symbol lists. This last is a large section of code, so
1313 I've imbedded it in the following macro.
1316 switch (nlist
.n_type
)
1319 * Standard, external, non-debugger, symbols
1322 case N_TEXT
| N_EXT
:
1323 case N_NBTEXT
| N_EXT
:
1324 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1325 SECT_OFF_TEXT (objfile
));
1328 case N_DATA
| N_EXT
:
1329 case N_NBDATA
| N_EXT
:
1330 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1331 SECT_OFF_DATA (objfile
));
1336 case N_NBBSS
| N_EXT
:
1337 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1338 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1339 SECT_OFF_BSS (objfile
));
1344 namestring
= set_namestring (objfile
, &nlist
);
1347 record_minimal_symbol (namestring
, nlist
.n_value
,
1348 nlist
.n_type
, objfile
); /* Always */
1351 /* Standard, local, non-debugger, symbols */
1355 /* We need to be able to deal with both N_FN or N_TEXT,
1356 because we have no way of knowing whether the sys-supplied ld
1357 or GNU ld was used to make the executable. Sequents throw
1358 in another wrinkle -- they renumbered N_FN. */
1363 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1364 SECT_OFF_TEXT (objfile
));
1365 namestring
= set_namestring (objfile
, &nlist
);
1367 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1368 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1369 && namestring
[nsl
- 2] == '.'))
1371 if (past_first_source_file
&& pst
1372 /* The gould NP1 uses low values for .o and -l symbols
1373 which are not the address. */
1374 && nlist
.n_value
>= pst
->textlow
)
1376 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1377 symnum
* symbol_size
,
1378 nlist
.n_value
> pst
->texthigh
1379 ? nlist
.n_value
: pst
->texthigh
,
1380 dependency_list
, dependencies_used
,
1382 pst
= (struct partial_symtab
*) 0;
1384 dependencies_used
= 0;
1387 past_first_source_file
= 1;
1388 last_o_file_start
= nlist
.n_value
;
1395 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1396 SECT_OFF_DATA (objfile
));
1399 case N_UNDF
| N_EXT
:
1400 if (nlist
.n_value
!= 0)
1402 /* This is a "Fortran COMMON" symbol. See if the target
1403 environment knows where it has been relocated to. */
1407 namestring
= set_namestring (objfile
, &nlist
);
1408 if (target_lookup_symbol (namestring
, &reladdr
))
1410 continue; /* Error in lookup; ignore symbol for now. */
1412 nlist
.n_type
^= (N_BSS
^ N_UNDF
); /* Define it as a bss-symbol */
1413 nlist
.n_value
= reladdr
;
1414 goto bss_ext_symbol
;
1416 continue; /* Just undefined, not COMMON */
1419 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1421 /* Deal with relative offsets in the string table
1422 used in ELF+STAB under Solaris. If we want to use the
1423 n_strx field, which contains the name of the file,
1424 we must adjust file_string_table_offset *before* calling
1425 set_namestring(). */
1426 past_first_source_file
= 1;
1427 file_string_table_offset
= next_file_string_table_offset
;
1428 next_file_string_table_offset
=
1429 file_string_table_offset
+ nlist
.n_value
;
1430 if (next_file_string_table_offset
< file_string_table_offset
)
1431 error (_("string table offset backs up at %d"), symnum
);
1432 /* FIXME -- replace error() with complaint. */
1437 /* Lots of symbol types we can just ignore. */
1444 /* Keep going . . . */
1447 * Special symbol types for GNU
1450 case N_INDR
| N_EXT
:
1452 case N_SETA
| N_EXT
:
1454 case N_SETT
| N_EXT
:
1456 case N_SETD
| N_EXT
:
1458 case N_SETB
| N_EXT
:
1469 static int prev_so_symnum
= -10;
1470 static int first_so_symnum
;
1472 static char *dirname_nso
;
1473 int prev_textlow_not_set
;
1475 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1476 SECT_OFF_TEXT (objfile
));
1478 prev_textlow_not_set
= textlow_not_set
;
1480 /* A zero value is probably an indication for the SunPRO 3.0
1481 compiler. end_psymtab explicitly tests for zero, so
1482 don't relocate it. */
1484 if (nlist
.n_value
== 0
1485 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1487 textlow_not_set
= 1;
1491 textlow_not_set
= 0;
1493 past_first_source_file
= 1;
1495 if (prev_so_symnum
!= symnum
- 1)
1496 { /* Here if prev stab wasn't N_SO */
1497 first_so_symnum
= symnum
;
1501 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1502 symnum
* symbol_size
,
1503 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1504 dependency_list
, dependencies_used
,
1505 prev_textlow_not_set
);
1506 pst
= (struct partial_symtab
*) 0;
1508 dependencies_used
= 0;
1512 prev_so_symnum
= symnum
;
1514 /* End the current partial symtab and start a new one */
1516 namestring
= set_namestring (objfile
, &nlist
);
1518 /* Null name means end of .o file. Don't start a new one. */
1519 if (*namestring
== '\000')
1522 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1523 The first one is a directory name; the second the file name.
1524 If pst exists, is empty, and has a filename ending in '/',
1525 we assume the previous N_SO was a directory name. */
1527 p
= strrchr (namestring
, '/');
1528 if (p
&& *(p
+ 1) == '\000')
1530 /* Save the directory name SOs locally, then save it into
1531 the psymtab when it's created below. */
1532 dirname_nso
= namestring
;
1536 /* Some other compilers (C++ ones in particular) emit useless
1537 SOs for non-existant .c files. We ignore all subsequent SOs
1538 that immediately follow the first. */
1542 pst
= start_psymtab (objfile
,
1544 first_so_symnum
* symbol_size
,
1545 objfile
->global_psymbols
.next
,
1546 objfile
->static_psymbols
.next
);
1547 pst
->dirname
= dirname_nso
;
1555 enum language tmp_language
;
1556 /* Add this bincl to the bincl_list for future EXCLs. No
1557 need to save the string; it'll be around until
1558 read_dbx_symtab function returns */
1560 namestring
= set_namestring (objfile
, &nlist
);
1561 tmp_language
= deduce_language_from_filename (namestring
);
1563 /* Only change the psymtab's language if we've learned
1564 something useful (eg. tmp_language is not language_unknown).
1565 In addition, to match what start_subfile does, never change
1567 if (tmp_language
!= language_unknown
1568 && (tmp_language
!= language_c
1569 || psymtab_language
!= language_cplus
))
1570 psymtab_language
= tmp_language
;
1574 /* FIXME: we should not get here without a PST to work on.
1575 Attempt to recover. */
1576 complaint (&symfile_complaints
,
1577 _("N_BINCL %s not in entries for any file, at symtab \
1579 namestring
, symnum
);
1582 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1584 /* Mark down an include file in the current psymtab */
1586 goto record_include_file
;
1591 enum language tmp_language
;
1592 /* Mark down an include file in the current psymtab */
1594 namestring
= set_namestring (objfile
, &nlist
);
1595 tmp_language
= deduce_language_from_filename (namestring
);
1597 /* Only change the psymtab's language if we've learned
1598 something useful (eg. tmp_language is not language_unknown).
1599 In addition, to match what start_subfile does, never change
1601 if (tmp_language
!= language_unknown
1602 && (tmp_language
!= language_c
1603 || psymtab_language
!= language_cplus
))
1604 psymtab_language
= tmp_language
;
1606 /* In C++, one may expect the same filename to come round many
1607 times, when code is coming alternately from the main file
1608 and from inline functions in other files. So I check to see
1609 if this is a file we've seen before -- either the main
1610 source file, or a previously included file.
1612 This seems to be a lot of time to be spending on N_SOL, but
1613 things like "break c-exp.y:435" need to work (I
1614 suppose the psymtab_include_list could be hashed or put
1615 in a binary tree, if profiling shows this is a major hog). */
1616 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
1620 for (i
= 0; i
< includes_used
; i
++)
1621 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
1630 record_include_file
:
1632 psymtab_include_list
[includes_used
++] = namestring
;
1633 if (includes_used
>= includes_allocated
)
1635 char **orig
= psymtab_include_list
;
1637 psymtab_include_list
= (char **)
1638 alloca ((includes_allocated
*= 2) * sizeof (char *));
1639 memcpy (psymtab_include_list
, orig
,
1640 includes_used
* sizeof (char *));
1644 case N_LSYM
: /* Typedef or automatic variable. */
1645 case N_STSYM
: /* Data seg var -- static */
1646 case N_LCSYM
: /* BSS " */
1647 case N_ROSYM
: /* Read-only data seg var -- static. */
1648 case N_NBSTS
: /* Gould nobase. */
1649 case N_NBLCS
: /* symbols. */
1651 case N_GSYM
: /* Global (extern) variable; can be
1652 data or bss (sigh FIXME). */
1654 /* Following may probably be ignored; I'll leave them here
1655 for now (until I do Pascal and Modula 2 extensions). */
1657 case N_PC
: /* I may or may not need this; I
1659 case N_M2C
: /* I suspect that I can ignore this here. */
1660 case N_SCOPE
: /* Same. */
1664 namestring
= set_namestring (objfile
, &nlist
);
1666 /* See if this is an end of function stab. */
1667 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1671 /* It's value is the size (in bytes) of the function for
1672 function relative stabs, or the address of the function's
1673 end for old style stabs. */
1674 valu
= nlist
.n_value
+ last_function_start
;
1675 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1676 pst
->texthigh
= valu
;
1680 p
= (char *) strchr (namestring
, ':');
1682 continue; /* Not a debugging symbol. */
1684 /* Main processing section for debugging symbols which
1685 the initial read through the symbol tables needs to worry
1686 about. If we reach this point, the symbol which we are
1687 considering is definitely one we are interested in.
1688 p must also contain the (valid) index into the namestring
1689 which indicates the debugging type symbol. */
1694 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1697 if (gdbarch_static_transform_name_p (gdbarch
))
1698 namestring
= gdbarch_static_transform_name (gdbarch
,
1701 add_psymbol_to_list (namestring
, p
- namestring
,
1702 VAR_DOMAIN
, LOC_STATIC
,
1703 &objfile
->static_psymbols
,
1705 psymtab_language
, objfile
);
1709 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1711 /* The addresses in these entries are reported to be
1712 wrong. See the code that reads 'G's for symtabs. */
1713 add_psymbol_to_list (namestring
, p
- namestring
,
1714 VAR_DOMAIN
, LOC_STATIC
,
1715 &objfile
->global_psymbols
,
1717 psymtab_language
, objfile
);
1721 /* When a 'T' entry is defining an anonymous enum, it
1722 may have a name which is the empty string, or a
1723 single space. Since they're not really defining a
1724 symbol, those shouldn't go in the partial symbol
1725 table. We do pick up the elements of such enums at
1726 'check_enum:', below. */
1727 if (p
>= namestring
+ 2
1728 || (p
== namestring
+ 1
1729 && namestring
[0] != ' '))
1731 add_psymbol_to_list (namestring
, p
- namestring
,
1732 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1733 &objfile
->static_psymbols
,
1735 psymtab_language
, objfile
);
1738 /* Also a typedef with the same name. */
1739 add_psymbol_to_list (namestring
, p
- namestring
,
1740 VAR_DOMAIN
, LOC_TYPEDEF
,
1741 &objfile
->static_psymbols
,
1743 psymtab_language
, objfile
);
1750 if (p
!= namestring
) /* a name is there, not just :T... */
1752 add_psymbol_to_list (namestring
, p
- namestring
,
1753 VAR_DOMAIN
, LOC_TYPEDEF
,
1754 &objfile
->static_psymbols
,
1756 psymtab_language
, objfile
);
1759 /* If this is an enumerated type, we need to
1760 add all the enum constants to the partial symbol
1761 table. This does not cover enums without names, e.g.
1762 "enum {a, b} c;" in C, but fortunately those are
1763 rare. There is no way for GDB to find those from the
1764 enum type without spending too much time on it. Thus
1765 to solve this problem, the compiler needs to put out the
1766 enum in a nameless type. GCC2 does this. */
1768 /* We are looking for something of the form
1769 <name> ":" ("t" | "T") [<number> "="] "e"
1770 {<constant> ":" <value> ","} ";". */
1772 /* Skip over the colon and the 't' or 'T'. */
1774 /* This type may be given a number. Also, numbers can come
1775 in pairs like (0,26). Skip over it. */
1776 while ((*p
>= '0' && *p
<= '9')
1777 || *p
== '(' || *p
== ',' || *p
== ')'
1783 /* The aix4 compiler emits extra crud before the members. */
1786 /* Skip over the type (?). */
1790 /* Skip over the colon. */
1794 /* We have found an enumerated type. */
1795 /* According to comments in read_enum_type
1796 a comma could end it instead of a semicolon.
1797 I don't know where that happens.
1799 while (*p
&& *p
!= ';' && *p
!= ',')
1803 /* Check for and handle cretinous dbx symbol name
1805 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1806 p
= next_symbol_text (objfile
);
1808 /* Point to the character after the name
1809 of the enum constant. */
1810 for (q
= p
; *q
&& *q
!= ':'; q
++)
1812 /* Note that the value doesn't matter for
1813 enum constants in psymtabs, just in symtabs. */
1814 add_psymbol_to_list (p
, q
- p
,
1815 VAR_DOMAIN
, LOC_CONST
,
1816 &objfile
->static_psymbols
, 0,
1817 0, psymtab_language
, objfile
);
1818 /* Point past the name. */
1820 /* Skip over the value. */
1821 while (*p
&& *p
!= ',')
1823 /* Advance past the comma. */
1831 /* Constant, e.g. from "const" in Pascal. */
1832 add_psymbol_to_list (namestring
, p
- namestring
,
1833 VAR_DOMAIN
, LOC_CONST
,
1834 &objfile
->static_psymbols
, nlist
.n_value
,
1835 0, psymtab_language
, objfile
);
1841 int name_len
= p
- namestring
;
1842 char *name
= xmalloc (name_len
+ 1);
1843 memcpy (name
, namestring
, name_len
);
1844 name
[name_len
] = '\0';
1845 function_outside_compilation_unit_complaint (name
);
1848 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1849 SECT_OFF_TEXT (objfile
));
1850 /* Kludges for ELF/STABS with Sun ACC */
1851 last_function_name
= namestring
;
1852 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1853 value for the bottom of the text seg in those cases. */
1854 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1855 SECT_OFF_TEXT (objfile
))
1856 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1858 CORE_ADDR minsym_valu
=
1859 find_stab_function_addr (namestring
,
1860 pst
? pst
->filename
: NULL
,
1862 /* find_stab_function_addr will return 0 if the minimal
1863 symbol wasn't found. (Unfortunately, this might also
1864 be a valid address.) Anyway, if it *does* return 0,
1865 it is likely that the value was set correctly to begin
1867 if (minsym_valu
!= 0)
1868 nlist
.n_value
= minsym_valu
;
1870 if (pst
&& textlow_not_set
1871 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1873 pst
->textlow
= nlist
.n_value
;
1874 textlow_not_set
= 0;
1878 /* Keep track of the start of the last function so we
1879 can handle end of function symbols. */
1880 last_function_start
= nlist
.n_value
;
1882 /* In reordered executables this function may lie outside
1883 the bounds created by N_SO symbols. If that's the case
1884 use the address of this function as the low bound for
1885 the partial symbol table. */
1888 || (nlist
.n_value
< pst
->textlow
1890 != ANOFFSET (objfile
->section_offsets
,
1891 SECT_OFF_TEXT (objfile
))))))
1893 pst
->textlow
= nlist
.n_value
;
1894 textlow_not_set
= 0;
1896 add_psymbol_to_list (namestring
, p
- namestring
,
1897 VAR_DOMAIN
, LOC_BLOCK
,
1898 &objfile
->static_psymbols
,
1900 psymtab_language
, objfile
);
1903 /* Global functions were ignored here, but now they
1904 are put into the global psymtab like one would expect.
1905 They're also in the minimal symbol table. */
1909 int name_len
= p
- namestring
;
1910 char *name
= xmalloc (name_len
+ 1);
1911 memcpy (name
, namestring
, name_len
);
1912 name
[name_len
] = '\0';
1913 function_outside_compilation_unit_complaint (name
);
1916 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1917 SECT_OFF_TEXT (objfile
));
1918 /* Kludges for ELF/STABS with Sun ACC */
1919 last_function_name
= namestring
;
1920 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1921 value for the bottom of the text seg in those cases. */
1922 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1923 SECT_OFF_TEXT (objfile
))
1924 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1926 CORE_ADDR minsym_valu
=
1927 find_stab_function_addr (namestring
,
1928 pst
? pst
->filename
: NULL
,
1930 /* find_stab_function_addr will return 0 if the minimal
1931 symbol wasn't found. (Unfortunately, this might also
1932 be a valid address.) Anyway, if it *does* return 0,
1933 it is likely that the value was set correctly to begin
1935 if (minsym_valu
!= 0)
1936 nlist
.n_value
= minsym_valu
;
1938 if (pst
&& textlow_not_set
1939 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1941 pst
->textlow
= nlist
.n_value
;
1942 textlow_not_set
= 0;
1946 /* Keep track of the start of the last function so we
1947 can handle end of function symbols. */
1948 last_function_start
= nlist
.n_value
;
1950 /* In reordered executables this function may lie outside
1951 the bounds created by N_SO symbols. If that's the case
1952 use the address of this function as the low bound for
1953 the partial symbol table. */
1956 || (nlist
.n_value
< pst
->textlow
1958 != ANOFFSET (objfile
->section_offsets
,
1959 SECT_OFF_TEXT (objfile
))))))
1961 pst
->textlow
= nlist
.n_value
;
1962 textlow_not_set
= 0;
1964 add_psymbol_to_list (namestring
, p
- namestring
,
1965 VAR_DOMAIN
, LOC_BLOCK
,
1966 &objfile
->global_psymbols
,
1968 psymtab_language
, objfile
);
1971 /* Two things show up here (hopefully); static symbols of
1972 local scope (static used inside braces) or extensions
1973 of structure symbols. We can ignore both. */
1987 case '#': /* for symbol identification (used in live ranges) */
1991 /* It is a C++ nested symbol. We don't need to record it
1992 (I don't think); if we try to look up foo::bar::baz,
1993 then symbols for the symtab containing foo should get
1994 read in, I think. */
1995 /* Someone says sun cc puts out symbols like
1996 /foo/baz/maclib::/usr/local/bin/maclib,
1997 which would get here with a symbol type of ':'. */
2001 /* Unexpected symbol descriptor. The second and subsequent stabs
2002 of a continued stab can show up here. The question is
2003 whether they ever can mimic a normal stab--it would be
2004 nice if not, since we certainly don't want to spend the
2005 time searching to the end of every string looking for
2008 complaint (&symfile_complaints
, _("unknown symbol descriptor `%c'"),
2011 /* Ignore it; perhaps it is an extension that we don't
2019 namestring
= set_namestring (objfile
, &nlist
);
2021 /* Find the corresponding bincl and mark that psymtab on the
2022 psymtab dependency list */
2024 struct partial_symtab
*needed_pst
=
2025 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2027 /* If this include file was defined earlier in this file,
2029 if (needed_pst
== pst
)
2037 for (i
= 0; i
< dependencies_used
; i
++)
2038 if (dependency_list
[i
] == needed_pst
)
2044 /* If it's already in the list, skip the rest. */
2048 dependency_list
[dependencies_used
++] = needed_pst
;
2049 if (dependencies_used
>= dependencies_allocated
)
2051 struct partial_symtab
**orig
= dependency_list
;
2053 (struct partial_symtab
**)
2054 alloca ((dependencies_allocated
*= 2)
2055 * sizeof (struct partial_symtab
*));
2056 memcpy (dependency_list
, orig
,
2058 * sizeof (struct partial_symtab
*)));
2060 fprintf_unfiltered (gdb_stderr
,
2061 "Had to reallocate dependency list.\n");
2062 fprintf_unfiltered (gdb_stderr
,
2063 "New dependencies allocated: %d\n",
2064 dependencies_allocated
);
2072 /* Solaris 2 end of module, finish current partial symbol table.
2073 end_psymtab will set pst->texthigh to the proper value, which
2074 is necessary if a module compiled without debugging info
2075 follows this module. */
2076 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
2078 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2079 symnum
* symbol_size
,
2081 dependency_list
, dependencies_used
, textlow_not_set
);
2082 pst
= (struct partial_symtab
*) 0;
2084 dependencies_used
= 0;
2090 HANDLE_RBRAC (nlist
.n_value
);
2096 case N_SSYM
: /* Claim: Structure or union element.
2097 Hopefully, I can ignore this. */
2098 case N_ENTRY
: /* Alternate entry point; can ignore. */
2099 case N_MAIN
: /* Can definitely ignore this. */
2100 case N_CATCH
: /* These are GNU C++ extensions */
2101 case N_EHDECL
: /* that can safely be ignored here. */
2111 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2112 case N_DEFD
: /* GNU Modula-2 */
2113 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2115 case N_OBJ
: /* useless types from Solaris */
2118 /* These symbols aren't interesting; don't worry about them */
2123 /* If we haven't found it yet, ignore it. It's probably some
2124 new type we don't know about yet. */
2125 unknown_symtype_complaint (hex_string (nlist
.n_type
));
2130 /* If there's stuff to be cleaned up, clean it up. */
2133 /* Don't set pst->texthigh lower than it already is. */
2134 CORE_ADDR text_end
=
2135 (lowest_text_address
== (CORE_ADDR
) -1
2136 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
2137 SECT_OFF_TEXT (objfile
)))
2138 : lowest_text_address
)
2141 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2142 symnum
* symbol_size
,
2143 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2144 dependency_list
, dependencies_used
, textlow_not_set
);
2147 do_cleanups (back_to
);
2150 /* Allocate and partially fill a partial symtab. It will be
2151 completely filled at the end of the symbol list.
2153 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2154 is the address relative to which its symbols are (incremental) or 0
2157 static struct partial_symtab
*
2158 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2159 int ldsymoff
, struct partial_symbol
**global_syms
,
2160 struct partial_symbol
**static_syms
)
2162 struct partial_symtab
*result
=
2163 start_psymtab_common (objfile
, objfile
->section_offsets
,
2164 filename
, textlow
, global_syms
, static_syms
);
2166 result
->read_symtab_private
= (char *)
2167 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
2168 LDSYMOFF (result
) = ldsymoff
;
2169 result
->read_symtab
= dbx_psymtab_to_symtab
;
2170 SYMBOL_SIZE (result
) = symbol_size
;
2171 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2172 STRING_OFFSET (result
) = string_table_offset
;
2173 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2176 /* If we're handling an ELF file, drag some section-relocation info
2177 for this source file out of the ELF symbol table, to compensate for
2178 Sun brain death. This replaces the section_offsets in this psymtab,
2180 elfstab_offset_sections (objfile
, result
);
2183 /* Deduce the source language from the filename for this psymtab. */
2184 psymtab_language
= deduce_language_from_filename (filename
);
2189 /* Close off the current usage of PST.
2190 Returns PST or NULL if the partial symtab was empty and thrown away.
2192 FIXME: List variables and peculiarities of same. */
2194 struct partial_symtab
*
2195 end_psymtab (struct partial_symtab
*pst
, char **include_list
, int num_includes
,
2196 int capping_symbol_offset
, CORE_ADDR capping_text
,
2197 struct partial_symtab
**dependency_list
, int number_dependencies
,
2198 int textlow_not_set
)
2201 struct objfile
*objfile
= pst
->objfile
;
2202 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2204 if (capping_symbol_offset
!= -1)
2205 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2206 pst
->texthigh
= capping_text
;
2208 /* Under Solaris, the N_SO symbols always have a value of 0,
2209 instead of the usual address of the .o file. Therefore,
2210 we have to do some tricks to fill in texthigh and textlow.
2211 The first trick is: if we see a static
2212 or global function, and the textlow for the current pst
2213 is not set (ie: textlow_not_set), then we use that function's
2214 address for the textlow of the pst. */
2216 /* Now, to fill in texthigh, we remember the last function seen
2217 in the .o file. Also, there's a hack in
2218 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2219 to here via the misc_info field. Therefore, we can fill in
2220 a reliable texthigh by taking the address plus size of the
2221 last function in the file. */
2223 if (pst
->texthigh
== 0 && last_function_name
2224 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2228 struct minimal_symbol
*minsym
;
2230 p
= strchr (last_function_name
, ':');
2232 p
= last_function_name
;
2233 n
= p
- last_function_name
;
2235 strncpy (p
, last_function_name
, n
);
2238 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2241 /* Sun Fortran appends an underscore to the minimal symbol name,
2242 try again with an appended underscore if the minimal symbol
2246 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2250 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
2252 last_function_name
= NULL
;
2255 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2257 /* this test will be true if the last .o file is only data */
2258 else if (textlow_not_set
)
2259 pst
->textlow
= pst
->texthigh
;
2262 struct partial_symtab
*p1
;
2264 /* If we know our own starting text address, then walk through all other
2265 psymtabs for this objfile, and if any didn't know their ending text
2266 address, set it to our starting address. Take care to not set our
2267 own ending address to our starting address, nor to set addresses on
2268 `dependency' files that have both textlow and texthigh zero. */
2270 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2272 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2274 p1
->texthigh
= pst
->textlow
;
2275 /* if this file has only data, then make textlow match texthigh */
2276 if (p1
->textlow
== 0)
2277 p1
->textlow
= p1
->texthigh
;
2282 /* End of kludge for patching Solaris textlow and texthigh. */
2284 pst
->n_global_syms
=
2285 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
2286 + pst
->globals_offset
);
2287 pst
->n_static_syms
=
2288 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
2289 + pst
->statics_offset
);
2291 pst
->number_of_dependencies
= number_dependencies
;
2292 if (number_dependencies
)
2294 pst
->dependencies
= (struct partial_symtab
**)
2295 obstack_alloc (&objfile
->objfile_obstack
,
2296 number_dependencies
* sizeof (struct partial_symtab
*));
2297 memcpy (pst
->dependencies
, dependency_list
,
2298 number_dependencies
* sizeof (struct partial_symtab
*));
2301 pst
->dependencies
= 0;
2303 for (i
= 0; i
< num_includes
; i
++)
2305 struct partial_symtab
*subpst
=
2306 allocate_psymtab (include_list
[i
], objfile
);
2308 /* Copy the sesction_offsets array from the main psymtab. */
2309 subpst
->section_offsets
= pst
->section_offsets
;
2310 subpst
->read_symtab_private
=
2311 (char *) obstack_alloc (&objfile
->objfile_obstack
,
2312 sizeof (struct symloc
));
2316 subpst
->texthigh
= 0;
2318 /* We could save slight bits of space by only making one of these,
2319 shared by the entire set of include files. FIXME-someday. */
2320 subpst
->dependencies
= (struct partial_symtab
**)
2321 obstack_alloc (&objfile
->objfile_obstack
,
2322 sizeof (struct partial_symtab
*));
2323 subpst
->dependencies
[0] = pst
;
2324 subpst
->number_of_dependencies
= 1;
2326 subpst
->globals_offset
=
2327 subpst
->n_global_syms
=
2328 subpst
->statics_offset
=
2329 subpst
->n_static_syms
= 0;
2333 subpst
->read_symtab
= pst
->read_symtab
;
2336 sort_pst_symbols (pst
);
2338 /* If there is already a psymtab or symtab for a file of this name, remove it.
2339 (If there is a symtab, more drastic things also happen.)
2340 This happens in VxWorks. */
2341 free_named_symtabs (pst
->filename
);
2343 if (num_includes
== 0
2344 && number_dependencies
== 0
2345 && pst
->n_global_syms
== 0
2346 && pst
->n_static_syms
== 0
2347 && has_line_numbers
== 0)
2349 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2350 it is on the obstack, but we can forget to chain it on the list. */
2351 /* Empty psymtabs happen as a result of header files which don't have
2352 any symbols in them. There can be a lot of them. But this check
2353 is wrong, in that a psymtab with N_SLINE entries but nothing else
2354 is not empty, but we don't realize that. Fixing that without slowing
2355 things down might be tricky. */
2357 discard_psymtab (pst
);
2359 /* Indicate that psymtab was thrown away. */
2360 pst
= (struct partial_symtab
*) NULL
;
2366 dbx_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2368 struct cleanup
*old_chain
;
2376 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. \
2377 Shouldn't happen.\n",
2382 /* Read in all partial symtabs on which this one is dependent */
2383 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2384 if (!pst
->dependencies
[i
]->readin
)
2386 /* Inform about additional files that need to be read in. */
2389 fputs_filtered (" ", gdb_stdout
);
2391 fputs_filtered ("and ", gdb_stdout
);
2393 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2394 wrap_here (""); /* Flush output */
2395 gdb_flush (gdb_stdout
);
2397 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2400 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy */
2402 /* Init stuff necessary for reading in symbols */
2405 old_chain
= make_cleanup (really_free_pendings
, 0);
2406 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2407 symbol_size
= SYMBOL_SIZE (pst
);
2409 /* Read in this file's symbols */
2410 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2411 read_ofile_symtab (pst
);
2413 do_cleanups (old_chain
);
2419 /* Read in all of the symbols for a given psymtab for real.
2420 Be verbose about it if the user wants that. */
2423 dbx_psymtab_to_symtab (struct partial_symtab
*pst
)
2426 struct cleanup
*back_to
= NULL
;
2433 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. \
2434 Shouldn't happen.\n",
2439 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
2441 /* Print the message now, before reading the string table,
2442 to avoid disconcerting pauses. */
2445 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2446 gdb_flush (gdb_stdout
);
2449 sym_bfd
= pst
->objfile
->obfd
;
2451 next_symbol_text_func
= dbx_next_symbol_text
;
2453 if (DBX_STAB_SECTION (pst
->objfile
))
2456 = symfile_relocate_debug_section (pst
->objfile
->obfd
,
2457 DBX_STAB_SECTION (pst
->objfile
),
2460 back_to
= make_cleanup (free_current_contents
,
2461 (void *) &stabs_data
);
2464 dbx_psymtab_to_symtab_1 (pst
);
2467 do_cleanups (back_to
);
2469 /* Match with global symbols. This only needs to be done once,
2470 after all of the symtabs and dependencies have been read in. */
2471 scan_file_globals (pst
->objfile
);
2473 /* Finish up the debug error message. */
2475 printf_filtered ("done.\n");
2479 /* Read in a defined section of a specific object file's symbols. */
2482 read_ofile_symtab (struct partial_symtab
*pst
)
2485 struct external_nlist
*bufp
;
2486 struct internal_nlist nlist
;
2488 unsigned max_symnum
;
2490 struct objfile
*objfile
;
2491 int sym_offset
; /* Offset to start of symbols to read */
2492 int sym_size
; /* Size of symbols to read */
2493 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2494 int text_size
; /* Size of text segment for symbols */
2495 struct section_offsets
*section_offsets
;
2497 objfile
= pst
->objfile
;
2498 sym_offset
= LDSYMOFF (pst
);
2499 sym_size
= LDSYMLEN (pst
);
2500 text_offset
= pst
->textlow
;
2501 text_size
= pst
->texthigh
- pst
->textlow
;
2502 /* This cannot be simply objfile->section_offsets because of
2503 elfstab_offset_sections() which initializes the psymtab section
2504 offsets information in a special way, and that is different from
2505 objfile->section_offsets. */
2506 section_offsets
= pst
->section_offsets
;
2508 current_objfile
= objfile
;
2509 subfile_stack
= NULL
;
2511 stringtab_global
= DBX_STRINGTAB (objfile
);
2512 last_source_file
= NULL
;
2514 abfd
= objfile
->obfd
;
2515 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
2516 symbuf_end
= symbuf_idx
= 0;
2518 symbuf_left
= sym_offset
+ sym_size
;
2520 /* It is necessary to actually read one symbol *before* the start
2521 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2522 occurs before the N_SO symbol.
2524 Detecting this in read_dbx_symtab
2525 would slow down initial readin, so we look for it here instead. */
2526 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2528 stabs_seek (sym_offset
- symbol_size
);
2530 bufp
= &symbuf
[symbuf_idx
++];
2531 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2532 OBJSTAT (objfile
, n_stabs
++);
2534 namestring
= set_namestring (objfile
, &nlist
);
2536 processing_gcc_compilation
= 0;
2537 if (nlist
.n_type
== N_TEXT
)
2539 const char *tempstring
= namestring
;
2541 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2542 processing_gcc_compilation
= 1;
2543 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2544 processing_gcc_compilation
= 2;
2545 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2547 if (strncmp (tempstring
, "__gnu_compiled", 14) == 0)
2548 processing_gcc_compilation
= 2;
2551 /* Try to select a C++ demangling based on the compilation unit
2555 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2556 know whether it will use the old style or v3 mangling. */
2557 if (processing_gcc_compilation
)
2559 if (AUTO_DEMANGLING
)
2561 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2568 /* The N_SO starting this symtab is the first symbol, so we
2569 better not check the symbol before it. I'm not this can
2570 happen, but it doesn't hurt to check for it. */
2571 stabs_seek (sym_offset
);
2572 processing_gcc_compilation
= 0;
2575 if (symbuf_idx
== symbuf_end
)
2577 bufp
= &symbuf
[symbuf_idx
];
2578 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2579 error (_("First symbol in segment of executable not a source symbol"));
2581 max_symnum
= sym_size
/ symbol_size
;
2584 symnum
< max_symnum
;
2587 QUIT
; /* Allow this to be interruptable */
2588 if (symbuf_idx
== symbuf_end
)
2590 bufp
= &symbuf
[symbuf_idx
++];
2591 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2592 OBJSTAT (objfile
, n_stabs
++);
2594 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2596 namestring
= set_namestring (objfile
, &nlist
);
2600 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2601 namestring
, section_offsets
, objfile
);
2603 /* We skip checking for a new .o or -l file; that should never
2604 happen in this routine. */
2605 else if (type
== N_TEXT
)
2607 /* I don't think this code will ever be executed, because
2608 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2609 the N_SO symbol which starts this source file.
2610 However, there is no reason not to accept
2611 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2613 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2614 processing_gcc_compilation
= 1;
2615 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2616 processing_gcc_compilation
= 2;
2619 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2620 know whether it will use the old style or v3 mangling. */
2621 if (AUTO_DEMANGLING
)
2623 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2627 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2628 || type
== (unsigned char) N_NBTEXT
2631 /* Global symbol: see if we came across a dbx defintion for
2632 a corresponding symbol. If so, store the value. Remove
2633 syms from the chain when their values are stored, but
2634 search the whole chain, as there may be several syms from
2635 different files with the same name. */
2636 /* This is probably not true. Since the files will be read
2637 in one at a time, each reference to a global symbol will
2638 be satisfied in each file as it appears. So we skip this
2644 /* In a Solaris elf file, this variable, which comes from the
2645 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2646 which comes from pst->textlow is correct. */
2647 if (last_source_start_addr
== 0)
2648 last_source_start_addr
= text_offset
;
2650 /* In reordered executables last_source_start_addr may not be the
2651 lower bound for this symtab, instead use text_offset which comes
2652 from pst->textlow which is correct. */
2653 if (last_source_start_addr
> text_offset
)
2654 last_source_start_addr
= text_offset
;
2656 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
,
2657 SECT_OFF_TEXT (objfile
));
2661 current_objfile
= NULL
;
2665 /* This handles a single symbol from the symbol-file, building symbols
2666 into a GDB symtab. It takes these arguments and an implicit argument.
2668 TYPE is the type field of the ".stab" symbol entry.
2669 DESC is the desc field of the ".stab" entry.
2670 VALU is the value field of the ".stab" entry.
2671 NAME is the symbol name, in our address space.
2672 SECTION_OFFSETS is a set of amounts by which the sections of this
2673 object file were relocated when it was loaded into memory. Note
2674 that these section_offsets are not the objfile->section_offsets but
2675 the pst->section_offsets. All symbols that refer to memory
2676 locations need to be offset by these amounts.
2677 OBJFILE is the object file from which we are reading symbols. It
2678 is used in end_symtab. */
2681 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2682 struct section_offsets
*section_offsets
,
2683 struct objfile
*objfile
)
2685 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2686 struct context_stack
*new;
2687 /* This remembers the address of the start of a function. It is
2688 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2689 are relative to the current function's start address. On systems
2690 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2691 and is used to relocate these symbol types rather than
2693 static CORE_ADDR function_start_offset
;
2695 /* This holds the address of the start of a function, without the
2696 system peculiarities of function_start_offset. */
2697 static CORE_ADDR last_function_start
;
2699 /* If this is nonzero, we've seen an N_SLINE since the start of the
2700 current function. We use this to tell us to move the first sline
2701 to the beginning of the function regardless of what its given
2703 static int sline_found_in_function
= 1;
2705 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2706 source file. Used to detect the SunPRO solaris compiler. */
2707 static int n_opt_found
;
2709 /* The stab type used for the definition of the last function.
2710 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2711 static int function_stab_type
= 0;
2713 if (!block_address_function_relative
)
2715 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2716 function start address, so just use the text offset. */
2717 function_start_offset
=
2718 ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2721 /* Something is wrong if we see real data before seeing a source
2724 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
2726 /* Ignore any symbols which appear before an N_SO symbol.
2727 Currently no one puts symbols there, but we should deal
2728 gracefully with the case. A complain()t might be in order,
2729 but this should not be an error (). */
2738 if (*name
== '\000')
2740 /* This N_FUN marks the end of a function. This closes off
2741 the current block. */
2742 struct block
*block
;
2744 if (context_stack_depth
<= 0)
2746 lbrac_mismatch_complaint (symnum
);
2750 /* The following check is added before recording line 0 at
2751 end of function so as to handle hand-generated stabs
2752 which may have an N_FUN stabs at the end of the function,
2753 but no N_SLINE stabs. */
2754 if (sline_found_in_function
)
2755 record_line (current_subfile
, 0, last_function_start
+ valu
);
2757 within_function
= 0;
2758 new = pop_context ();
2760 /* Make a block for the local symbols within. */
2761 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
2762 new->start_addr
, new->start_addr
+ valu
,
2765 /* For C++, set the block's scope. */
2766 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
2767 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
2770 /* May be switching to an assembler file which may not be using
2771 block relative stabs, so reset the offset. */
2772 if (block_address_function_relative
)
2773 function_start_offset
= 0;
2778 sline_found_in_function
= 0;
2780 /* Relocate for dynamic loading. */
2781 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2782 valu
= gdbarch_smash_text_address (gdbarch
, valu
);
2783 last_function_start
= valu
;
2785 goto define_a_symbol
;
2788 /* This "symbol" just indicates the start of an inner lexical
2789 context within a function. */
2791 /* Ignore extra outermost context from SunPRO cc and acc. */
2792 if (n_opt_found
&& desc
== 1)
2795 if (block_address_function_relative
)
2796 /* Relocate for Sun ELF acc fn-relative syms. */
2797 valu
+= function_start_offset
;
2799 /* On most machines, the block addresses are relative to the
2800 N_SO, the linker did not relocate them (sigh). */
2801 valu
+= last_source_start_addr
;
2803 new = push_context (desc
, valu
);
2807 /* This "symbol" just indicates the end of an inner lexical
2808 context that was started with N_LBRAC. */
2810 /* Ignore extra outermost context from SunPRO cc and acc. */
2811 if (n_opt_found
&& desc
== 1)
2814 if (block_address_function_relative
)
2815 /* Relocate for Sun ELF acc fn-relative syms. */
2816 valu
+= function_start_offset
;
2818 /* On most machines, the block addresses are relative to the
2819 N_SO, the linker did not relocate them (sigh). */
2820 valu
+= last_source_start_addr
;
2822 if (context_stack_depth
<= 0)
2824 lbrac_mismatch_complaint (symnum
);
2828 new = pop_context ();
2829 if (desc
!= new->depth
)
2830 lbrac_mismatch_complaint (symnum
);
2832 if (local_symbols
!= NULL
)
2834 /* GCC development snapshots from March to December of
2835 2000 would output N_LSYM entries after N_LBRAC
2836 entries. As a consequence, these symbols are simply
2837 discarded. Complain if this is the case. */
2838 complaint (&symfile_complaints
, _("\
2839 misplaced N_LBRAC entry; discarding local symbols which have \
2840 no enclosing block"));
2842 local_symbols
= new->locals
;
2844 if (context_stack_depth
> 1)
2846 /* This is not the outermost LBRAC...RBRAC pair in the
2847 function, its local symbols preceded it, and are the ones
2848 just recovered from the context stack. Define the block
2849 for them (but don't bother if the block contains no
2850 symbols. Should we complain on blocks without symbols?
2851 I can't think of any useful purpose for them). */
2852 if (local_symbols
!= NULL
)
2854 /* Muzzle a compiler bug that makes end < start.
2856 ??? Which compilers? Is this ever harmful?. */
2857 if (new->start_addr
> valu
)
2859 complaint (&symfile_complaints
,
2860 _("block start larger than block end"));
2861 new->start_addr
= valu
;
2863 /* Make a block for the local symbols within. */
2864 finish_block (0, &local_symbols
, new->old_blocks
,
2865 new->start_addr
, valu
, objfile
);
2870 /* This is the outermost LBRAC...RBRAC pair. There is no
2871 need to do anything; leave the symbols that preceded it
2872 to be attached to the function's own block. We need to
2873 indicate that we just moved outside of the function. */
2874 within_function
= 0;
2881 /* This kind of symbol indicates the start of an object file.
2882 Relocate for dynamic loading. */
2883 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2887 /* This type of symbol indicates the start of data for one
2888 source file. Finish the symbol table of the previous source
2889 file (if any) and start accumulating a new symbol table.
2890 Relocate for dynamic loading. */
2891 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2895 if (last_source_file
)
2897 /* Check if previous symbol was also an N_SO (with some
2898 sanity checks). If so, that one was actually the
2899 directory name, and the current one is the real file
2900 name. Patch things up. */
2901 if (previous_stab_code
== (unsigned char) N_SO
)
2903 patch_subfile_names (current_subfile
, name
);
2904 break; /* Ignore repeated SOs */
2906 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2910 /* Null name means this just marks the end of text for this .o
2911 file. Don't start a new symtab in this case. */
2912 if (*name
== '\000')
2915 if (block_address_function_relative
)
2916 function_start_offset
= 0;
2919 start_symtab (name
, NULL
, valu
);
2920 record_debugformat ("stabs");
2924 /* This type of symbol indicates the start of data for a
2925 sub-source-file, one whose contents were copied or included
2926 in the compilation of the main source file (whose name was
2927 given in the N_SO symbol). Relocate for dynamic loading. */
2928 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2929 start_subfile (name
, current_subfile
->dirname
);
2934 add_new_header_file (name
, valu
);
2935 start_subfile (name
, current_subfile
->dirname
);
2939 start_subfile (pop_subfile (), current_subfile
->dirname
);
2943 add_old_header_file (name
, valu
);
2947 /* This type of "symbol" really just records one line-number --
2948 core-address correspondence. Enter it in the line list for
2949 this symbol table. */
2951 /* Relocate for dynamic loading and for ELF acc
2952 function-relative symbols. */
2953 valu
+= function_start_offset
;
2955 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
2956 middle of the prologue instead of right at the start of the
2957 function. To deal with this we record the address for the
2958 first N_SLINE stab to be the start of the function instead of
2959 the listed location. We really shouldn't to this. When
2960 compiling with optimization, this first N_SLINE stab might be
2961 optimized away. Other (non-GCC) compilers don't emit this
2962 stab at all. There is no real harm in having an extra
2963 numbered line, although it can be a bit annoying for the
2964 user. However, it totally screws up our testsuite.
2966 So for now, keep adjusting the address of the first N_SLINE
2967 stab, but only for code compiled with GCC. */
2969 if (within_function
&& sline_found_in_function
== 0)
2971 if (processing_gcc_compilation
== 2)
2972 record_line (current_subfile
, desc
, last_function_start
);
2974 record_line (current_subfile
, desc
, valu
);
2975 sline_found_in_function
= 1;
2978 record_line (current_subfile
, desc
, valu
);
2982 common_block_start (name
, objfile
);
2986 common_block_end (objfile
);
2989 /* The following symbol types need to have the appropriate
2990 offset added to their value; then we process symbol
2991 definitions in the name. */
2993 case N_STSYM
: /* Static symbol in data segment. */
2994 case N_LCSYM
: /* Static symbol in BSS segment. */
2995 case N_ROSYM
: /* Static symbol in read-only data segment. */
2996 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2997 Solaris 2's stabs-in-elf makes *most* symbols relative but
2998 leaves a few absolute (at least for Solaris 2.1 and version
2999 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3000 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3001 relocates it) .stab "foo:V...",N_STSYM is relative (section
3002 base subtracted). This leaves us no choice but to search for
3003 the 'S' or 'V'... (or pass the whole section_offsets stuff
3004 down ONE MORE function call level, which we really don't want
3009 /* Normal object file and NLMs have non-zero text seg offsets,
3010 but don't need their static syms offset in this fashion.
3011 XXX - This is really a crock that should be fixed in the
3012 solib handling code so that I don't have to work around it
3015 if (!symfile_relocatable
)
3017 p
= strchr (name
, ':');
3018 if (p
!= 0 && p
[1] == 'S')
3020 /* The linker relocated it. We don't want to add an
3021 elfstab_offset_sections-type offset, but we *do*
3022 want to add whatever solib.c passed to
3023 symbol_file_add as addr (this is known to affect
3024 SunOS 4, and I suspect ELF too). Since
3025 elfstab_offset_sections currently does not muck
3026 with the text offset (there is no Ttext.text
3027 symbol), we can get addr from the text offset. If
3028 elfstab_offset_sections ever starts dealing with
3029 the text offset, and we still need to do this, we
3030 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3031 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3032 goto define_a_symbol
;
3035 /* Since it's not the kludge case, re-dispatch to the right
3046 internal_error (__FILE__
, __LINE__
,
3047 _("failed internal consistency check"));
3051 case_N_STSYM
: /* Static symbol in data segment. */
3052 case N_DSLINE
: /* Source line number, data segment. */
3053 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3054 goto define_a_symbol
;
3056 case_N_LCSYM
: /* Static symbol in BSS segment. */
3057 case N_BSLINE
: /* Source line number, BSS segment. */
3058 /* N_BROWS: overlaps with N_BSLINE. */
3059 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3060 goto define_a_symbol
;
3062 case_N_ROSYM
: /* Static symbol in read-only data segment. */
3063 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3064 goto define_a_symbol
;
3066 case N_ENTRY
: /* Alternate entry point. */
3067 /* Relocate for dynamic loading. */
3068 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3069 goto define_a_symbol
;
3071 /* The following symbol types we don't know how to process.
3072 Handle them in a "default" way, but complain to people who
3075 case N_CATCH
: /* Exception handler catcher. */
3076 case N_EHDECL
: /* Exception handler name. */
3077 case N_PC
: /* Global symbol in Pascal. */
3078 case N_M2C
: /* Modula-2 compilation unit. */
3079 /* N_MOD2: overlaps with N_EHDECL. */
3080 case N_SCOPE
: /* Modula-2 scope information. */
3081 case N_ECOML
: /* End common (local name). */
3082 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3087 unknown_symtype_complaint (hex_string (type
));
3090 /* The following symbol types don't need the address field
3091 relocated, since it is either unused, or is absolute. */
3093 case N_GSYM
: /* Global variable. */
3094 case N_NSYMS
: /* Number of symbols (Ultrix). */
3095 case N_NOMAP
: /* No map? (Ultrix). */
3096 case N_RSYM
: /* Register variable. */
3097 case N_DEFD
: /* Modula-2 GNU module dependency. */
3098 case N_SSYM
: /* Struct or union element. */
3099 case N_LSYM
: /* Local symbol in stack. */
3100 case N_PSYM
: /* Parameter variable. */
3101 case N_LENG
: /* Length of preceding symbol type. */
3105 char *colon_pos
= strchr (name
, ':');
3106 if (colon_pos
== NULL
)
3109 deftype
= colon_pos
[1];
3115 function_stab_type
= type
;
3117 /* Deal with the SunPRO 3.0 compiler which omits the
3118 address from N_FUN symbols. */
3120 && valu
== ANOFFSET (section_offsets
,
3121 SECT_OFF_TEXT (objfile
))
3122 && gdbarch_sofun_address_maybe_missing (gdbarch
))
3124 CORE_ADDR minsym_valu
=
3125 find_stab_function_addr (name
, last_source_file
, objfile
);
3127 /* The function find_stab_function_addr will return
3128 0 if the minimal symbol wasn't found.
3129 (Unfortunately, this might also be a valid
3130 address.) Anyway, if it *does* return 0, it is
3131 likely that the value was set correctly to begin
3133 if (minsym_valu
!= 0)
3137 if (block_address_function_relative
)
3138 /* For Solaris 2 compilers, the block addresses and
3139 N_SLINE's are relative to the start of the
3140 function. On normal systems, and when using GCC on
3141 Solaris 2, these addresses are just absolute, or
3142 relative to the N_SO, depending on
3143 BLOCK_ADDRESS_ABSOLUTE. */
3144 function_start_offset
= valu
;
3146 within_function
= 1;
3148 if (context_stack_depth
> 1)
3150 complaint (&symfile_complaints
,
3151 _("unmatched N_LBRAC before symtab pos %d"),
3156 if (context_stack_depth
> 0)
3158 struct block
*block
;
3160 new = pop_context ();
3161 /* Make a block for the local symbols within. */
3162 block
= finish_block (new->name
, &local_symbols
,
3163 new->old_blocks
, new->start_addr
,
3166 /* For C++, set the block's scope. */
3167 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
3168 cp_set_block_scope (new->name
, block
,
3169 &objfile
->objfile_obstack
,
3173 new = push_context (0, valu
);
3174 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3178 define_symbol (valu
, name
, desc
, type
, objfile
);
3184 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3185 for a bunch of other flags, too. Someday we may parse their
3186 flags; for now we ignore theirs and hope they'll ignore ours. */
3187 case N_OPT
: /* Solaris 2: Compiler options. */
3190 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3192 processing_gcc_compilation
= 2;
3193 #if 0 /* Works, but is experimental. -fnf */
3194 /* For now, stay with AUTO_DEMANGLING for g++ output, as
3195 we don't know whether it will use the old style or v3
3197 if (AUTO_DEMANGLING
)
3199 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
3208 case N_MAIN
: /* Name of main routine. */
3209 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3210 it with a symbol file with "main" and without N_MAIN. I'm
3211 not sure exactly what rule to follow but probably something
3212 like: N_MAIN takes precedence over "main" no matter what
3213 objfile it is in; If there is more than one N_MAIN, choose
3214 the one in the symfile_objfile; If there is more than one
3215 N_MAIN within a given objfile, complain() and choose
3216 arbitrarily. (kingdon) */
3218 set_main_name (name
);
3221 /* The following symbol types can be ignored. */
3222 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3223 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3224 /* N_UNDF: Solaris 2: File separator mark. */
3225 /* N_UNDF: -- we will never encounter it, since we only process
3226 one file's symbols at once. */
3227 case N_ENDM
: /* Solaris 2: End of module. */
3228 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3232 /* '#' is a GNU C extension to allow one symbol to refer to another
3235 Generally this is used so that an alias can refer to its main
3239 /* Initialize symbol reference names and determine if this is a
3240 definition. If a symbol reference is being defined, go ahead
3241 and add it. Otherwise, just return. */
3246 /* If this stab defines a new reference ID that is not on the
3247 reference list, then put it on the reference list.
3249 We go ahead and advance NAME past the reference, even though
3250 it is not strictly necessary at this time. */
3251 refnum
= symbol_reference_defined (&s
);
3253 if (!ref_search (refnum
))
3254 ref_add (refnum
, 0, name
, valu
);
3258 previous_stab_code
= type
;
3261 /* FIXME: The only difference between this and elfstab_build_psymtabs
3262 is the call to install_minimal_symbols for elf, and the support for
3263 split sections. If the differences are really that small, the code
3264 should be shared. */
3266 /* Scan and build partial symbols for an coff symbol file.
3267 The coff file has already been processed to get its minimal symbols.
3269 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3272 OBJFILE is the object file we are reading symbols from.
3273 ADDR is the address relative to which the symbols are (e.g.
3274 the base address of the text segment).
3275 MAINLINE is true if we are reading the main symbol
3276 table (as opposed to a shared lib or dynamically loaded file).
3277 TEXTADDR is the address of the text section.
3278 TEXTSIZE is the size of the text section.
3279 STABSECTS is the list of .stab sections in OBJFILE.
3280 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3281 .stabstr section exists.
3283 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3284 adjusted for coff details. */
3287 coffstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3288 CORE_ADDR textaddr
, unsigned int textsize
,
3289 struct stab_section_list
*stabsects
,
3290 file_ptr stabstroffset
, unsigned int stabstrsize
)
3293 bfd
*sym_bfd
= objfile
->obfd
;
3294 char *name
= bfd_get_filename (sym_bfd
);
3295 struct dbx_symfile_info
*info
;
3296 unsigned int stabsize
;
3298 /* There is already a dbx_symfile_info allocated by our caller.
3299 It might even contain some info from the coff symtab to help us. */
3300 info
= objfile
->deprecated_sym_stab_info
;
3302 DBX_TEXT_ADDR (objfile
) = textaddr
;
3303 DBX_TEXT_SIZE (objfile
) = textsize
;
3305 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3306 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3307 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3309 if (stabstrsize
> bfd_get_size (sym_bfd
))
3310 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3311 DBX_STRINGTAB (objfile
) = (char *)
3312 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3313 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3315 /* Now read in the string table in one big gulp. */
3317 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3319 perror_with_name (name
);
3320 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3321 if (val
!= stabstrsize
)
3322 perror_with_name (name
);
3324 stabsread_new_init ();
3325 buildsym_new_init ();
3326 free_header_files ();
3327 init_header_files ();
3329 processing_acc_compilation
= 1;
3331 /* In a coff file, we've already installed the minimal symbols that came
3332 from the coff (non-stab) symbol table, so always act like an
3333 incremental load here. */
3334 if (stabsects
->next
== NULL
)
3336 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3337 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3338 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3342 struct stab_section_list
*stabsect
;
3344 DBX_SYMCOUNT (objfile
) = 0;
3345 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3347 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3348 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3351 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3353 symbuf_sections
= stabsects
->next
;
3354 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3358 dbx_symfile_read (objfile
, 0);
3361 /* Scan and build partial symbols for an ELF symbol file.
3362 This ELF file has already been processed to get its minimal symbols.
3364 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3367 OBJFILE is the object file we are reading symbols from.
3368 ADDR is the address relative to which the symbols are (e.g.
3369 the base address of the text segment).
3370 MAINLINE is true if we are reading the main symbol
3371 table (as opposed to a shared lib or dynamically loaded file).
3372 STABSECT is the BFD section information for the .stab section.
3373 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3374 .stabstr section exists.
3376 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3377 adjusted for elf details. */
3380 elfstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3382 file_ptr stabstroffset
, unsigned int stabstrsize
)
3385 bfd
*sym_bfd
= objfile
->obfd
;
3386 char *name
= bfd_get_filename (sym_bfd
);
3387 struct dbx_symfile_info
*info
;
3388 struct cleanup
*back_to
= NULL
;
3390 /* There is already a dbx_symfile_info allocated by our caller.
3391 It might even contain some info from the ELF symtab to help us. */
3392 info
= objfile
->deprecated_sym_stab_info
;
3394 /* Find the first and last text address. dbx_symfile_read seems to
3396 find_text_range (sym_bfd
, objfile
);
3398 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3399 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3400 DBX_SYMCOUNT (objfile
)
3401 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3402 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3403 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3404 DBX_STAB_SECTION (objfile
) = stabsect
;
3406 if (stabstrsize
> bfd_get_size (sym_bfd
))
3407 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3408 DBX_STRINGTAB (objfile
) = (char *)
3409 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3410 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3412 /* Now read in the string table in one big gulp. */
3414 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3416 perror_with_name (name
);
3417 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3418 if (val
!= stabstrsize
)
3419 perror_with_name (name
);
3421 stabsread_new_init ();
3422 buildsym_new_init ();
3423 free_header_files ();
3424 init_header_files ();
3426 processing_acc_compilation
= 1;
3429 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3430 stabs_data
= symfile_relocate_debug_section (objfile
->obfd
, stabsect
, NULL
);
3432 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
3434 /* In an elf file, we've already installed the minimal symbols that came
3435 from the elf (non-stab) symbol table, so always act like an
3436 incremental load here. dbx_symfile_read should not generate any new
3437 minimal symbols, since we will have already read the ELF dynamic symbol
3438 table and normal symbol entries won't be in the ".stab" section; but in
3439 case it does, it will install them itself. */
3440 dbx_symfile_read (objfile
, 0);
3443 do_cleanups (back_to
);
3446 /* Scan and build partial symbols for a file with special sections for stabs
3447 and stabstrings. The file has already been processed to get its minimal
3448 symbols, and any other symbols that might be necessary to resolve GSYMs.
3450 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3453 OBJFILE is the object file we are reading symbols from.
3454 ADDR is the address relative to which the symbols are (e.g. the base address
3455 of the text segment).
3456 MAINLINE is true if we are reading the main symbol table (as opposed to a
3457 shared lib or dynamically loaded file).
3458 STAB_NAME is the name of the section that contains the stabs.
3459 STABSTR_NAME is the name of the section that contains the stab strings.
3461 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3464 stabsect_build_psymtabs (struct objfile
*objfile
, int mainline
, char *stab_name
,
3465 char *stabstr_name
, char *text_name
)
3468 bfd
*sym_bfd
= objfile
->obfd
;
3469 char *name
= bfd_get_filename (sym_bfd
);
3471 asection
*stabstrsect
;
3472 asection
*text_sect
;
3474 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3475 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3481 error (_("stabsect_build_psymtabs: Found stabs (%s), but not string \
3483 stab_name
, stabstr_name
);
3485 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
3486 xmalloc (sizeof (struct dbx_symfile_info
));
3487 memset (objfile
->deprecated_sym_stab_info
, 0,
3488 sizeof (struct dbx_symfile_info
));
3490 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3492 error (_("Can't find %s section in symbol file"), text_name
);
3493 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3494 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3496 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3497 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3498 / DBX_SYMBOL_SIZE (objfile
);
3499 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3500 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3502 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3503 error (_("ridiculous string table size: %d bytes"),
3504 DBX_STRINGTAB_SIZE (objfile
));
3505 DBX_STRINGTAB (objfile
) = (char *)
3506 obstack_alloc (&objfile
->objfile_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
3507 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3509 /* Now read in the string table in one big gulp. */
3511 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3512 stabstrsect
, /* bfd section */
3513 DBX_STRINGTAB (objfile
), /* input buffer */
3514 0, /* offset into section */
3515 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
3518 perror_with_name (name
);
3520 stabsread_new_init ();
3521 buildsym_new_init ();
3522 free_header_files ();
3523 init_header_files ();
3525 /* Now, do an incremental load */
3527 processing_acc_compilation
= 1;
3528 dbx_symfile_read (objfile
, 0);
3531 static struct sym_fns aout_sym_fns
=
3533 bfd_target_aout_flavour
,
3534 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
3535 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
3536 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
3537 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
3538 default_symfile_offsets
, /* sym_offsets: parse user's offsets to
3540 default_symfile_segments
, /* sym_segments: Get segment information from
3542 NULL
, /* sym_read_linetable */
3543 NULL
/* next: pointer to next struct sym_fns */
3547 _initialize_dbxread (void)
3549 add_symtab_fns (&aout_sym_fns
);