1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003.
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 2 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, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* This module provides three functions: dbx_symfile_init,
24 which initializes to read a symbol file; dbx_new_init, which
25 discards existing cached information when all symbols are being
26 discarded; and dbx_symfile_read, which reads a symbol table
29 dbx_symfile_read only does the minimum work necessary for letting the
30 user "name" things symbolically; it does not read the entire symtab.
31 Instead, it reads the external and static symbols and puts them in partial
32 symbol tables. When more extensive information is requested of a
33 file, the corresponding partial symbol table is mutated into a full
34 fledged symbol table by going back and reading the symbols
35 for real. dbx_psymtab_to_symtab() is the function that does this */
38 #include "gdb_string.h"
40 #if defined(USG) || defined(__CYGNUSCLIB__)
41 #include <sys/types.h>
45 #include "gdb_obstack.h"
48 #include "breakpoint.h"
50 #include "gdbcore.h" /* for bfd stuff */
51 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
55 #include "stabsread.h"
56 #include "gdb-stabs.h"
58 #include "language.h" /* Needed for local_hex_string */
59 #include "complaints.h"
61 #include "gdb_assert.h"
63 #include "aout/aout64.h"
64 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
67 /* We put a pointer to this structure in the read_symtab_private field
72 /* Offset within the file symbol table of first local symbol for this
77 /* Length (in bytes) of the section of the symbol table devoted to
78 this file's symbols (actually, the section bracketed may contain
79 more than just this file's symbols). If ldsymlen is 0, the only
80 reason for this thing's existence is the dependency list. Nothing
81 else will happen when it is read in. */
85 /* The size of each symbol in the symbol file (in external form). */
89 /* Further information needed to locate the symbols if they are in
94 int file_string_offset
;
97 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
98 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
99 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
100 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
101 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
102 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
103 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
106 /* Remember what we deduced to be the source language of this psymtab. */
108 static enum language psymtab_language
= language_unknown
;
110 /* The BFD for this file -- implicit parameter to next_symbol_text. */
112 static bfd
*symfile_bfd
;
114 /* The size of each symbol in the symbol file (in external form).
115 This is set by dbx_symfile_read when building psymtabs, and by
116 dbx_psymtab_to_symtab when building symtabs. */
118 static unsigned symbol_size
;
120 /* This is the offset of the symbol table in the executable file. */
122 static unsigned symbol_table_offset
;
124 /* This is the offset of the string table in the executable file. */
126 static unsigned string_table_offset
;
128 /* For elf+stab executables, the n_strx field is not a simple index
129 into the string table. Instead, each .o file has a base offset in
130 the string table, and the associated symbols contain offsets from
131 this base. The following two variables contain the base offset for
132 the current and next .o files. */
134 static unsigned int file_string_table_offset
;
135 static unsigned int next_file_string_table_offset
;
137 /* .o and NLM files contain unrelocated addresses which are based at
138 0. When non-zero, this flag disables some of the special cases for
139 Solaris elf+stab text addresses at location 0. */
141 static int symfile_relocatable
= 0;
143 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
144 relative to the function start address. */
146 static int block_address_function_relative
= 0;
148 /* The lowest text address we have yet encountered. This is needed
149 because in an a.out file, there is no header field which tells us
150 what address the program is actually going to be loaded at, so we
151 need to make guesses based on the symbols (which *are* relocated to
152 reflect the address it will be loaded at). */
154 static CORE_ADDR lowest_text_address
;
156 /* Non-zero if there is any line number info in the objfile. Prevents
157 end_psymtab from discarding an otherwise empty psymtab. */
159 static int has_line_numbers
;
161 /* Complaints about the symbols we have encountered. */
164 unknown_symtype_complaint (const char *arg1
)
166 complaint (&symfile_complaints
, "unknown symbol type %s", arg1
);
170 lbrac_mismatch_complaint (int arg1
)
172 complaint (&symfile_complaints
,
173 "N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", arg1
);
177 repeated_header_complaint (const char *arg1
, int arg2
)
179 complaint (&symfile_complaints
,
180 "\"repeated\" header file %s not previously seen, at symtab pos %d",
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' && DEPRECATED_STREQ ("__DYNAMIC", name
))
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
, NULL
, 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
->sym_stab_info
= (struct dbx_symfile_info
*)
629 xmmalloc (objfile
->md
, sizeof (struct dbx_symfile_info
));
630 memset (objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
632 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
633 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
634 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
636 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
637 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
638 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
640 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
642 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
644 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
646 error ("Can't find .text section in symbol file");
647 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
648 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
650 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
651 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
652 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
654 /* Read the string table and stash it away in the psymbol_obstack. It is
655 only needed as long as we need to expand psymbols into full symbols,
656 so when we blow away the psymbol 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 psymbol_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
->psymbol_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
->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 xmfree (objfile
->md
, objfile
->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_type = bfd_h_get_8 (abfd, (extern)->e_type); \
855 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
856 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
857 if (bfd_get_sign_extend_vma (abfd)) \
858 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
860 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
863 /* Invariant: The symbol pointed to by symbuf_idx is the first one
864 that hasn't been swapped. Swap the symbol at the same time
865 that symbuf_idx is incremented. */
867 /* dbx allows the text of a symbol name to be continued into the
868 next symbol name! When such a continuation is encountered
869 (a \ at the end of the text of a name)
870 call this function to get the continuation. */
873 dbx_next_symbol_text (struct objfile
*objfile
)
875 struct internal_nlist nlist
;
877 if (symbuf_idx
== symbuf_end
)
878 fill_symbuf (symfile_bfd
);
881 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
882 OBJSTAT (objfile
, n_stabs
++);
886 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
889 /* Initialize the list of bincls to contain none and have some
893 init_bincl_list (int number
, struct objfile
*objfile
)
895 bincls_allocated
= number
;
896 next_bincl
= bincl_list
= (struct header_file_location
*)
897 xmmalloc (objfile
->md
, bincls_allocated
* sizeof (struct header_file_location
));
900 /* Add a bincl to the list. */
903 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
905 if (next_bincl
>= bincl_list
+ bincls_allocated
)
907 int offset
= next_bincl
- bincl_list
;
908 bincls_allocated
*= 2;
909 bincl_list
= (struct header_file_location
*)
910 xmrealloc (pst
->objfile
->md
, (char *) bincl_list
,
911 bincls_allocated
* sizeof (struct header_file_location
));
912 next_bincl
= bincl_list
+ offset
;
914 next_bincl
->pst
= pst
;
915 next_bincl
->instance
= instance
;
916 next_bincl
++->name
= name
;
919 /* Given a name, value pair, find the corresponding
920 bincl in the list. Return the partial symtab associated
921 with that header_file_location. */
923 static struct partial_symtab
*
924 find_corresponding_bincl_psymtab (char *name
, int instance
)
926 struct header_file_location
*bincl
;
928 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
929 if (bincl
->instance
== instance
930 && strcmp (name
, bincl
->name
) == 0)
933 repeated_header_complaint (name
, symnum
);
934 return (struct partial_symtab
*) 0;
937 /* Free the storage allocated for the bincl list. */
940 free_bincl_list (struct objfile
*objfile
)
942 xmfree (objfile
->md
, bincl_list
);
943 bincls_allocated
= 0;
947 do_free_bincl_list_cleanup (void *objfile
)
949 free_bincl_list (objfile
);
952 static struct cleanup
*
953 make_cleanup_free_bincl_list (struct objfile
*objfile
)
955 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
958 /* Set namestring based on nlist. If the string table index is invalid,
959 give a fake name, and print a single error message per symbol file read,
960 rather than abort the symbol reading or flood the user with messages. */
963 set_namestring (struct objfile
*objfile
, struct internal_nlist nlist
)
967 if (((unsigned) nlist
.n_strx
+ file_string_table_offset
) >=
968 DBX_STRINGTAB_SIZE (objfile
))
970 complaint (&symfile_complaints
, "bad string table offset in symbol %d",
972 namestring
= "<bad string table offset>";
975 namestring
= nlist
.n_strx
+ file_string_table_offset
+
976 DBX_STRINGTAB (objfile
);
980 /* Scan a SunOs dynamic symbol table for symbols of interest and
981 add them to the minimal symbol table. */
984 read_dbx_dynamic_symtab (struct objfile
*objfile
)
986 bfd
*abfd
= objfile
->obfd
;
987 struct cleanup
*back_to
;
1000 /* Check that the symbol file has dynamic symbols that we know about.
1001 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1002 on a sun4 host (and vice versa) and bfd is not configured
1003 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1004 so we ignore the dynamic symbols in this case. */
1005 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1006 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1007 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1010 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1011 if (dynsym_size
< 0)
1014 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1015 back_to
= make_cleanup (xfree
, dynsyms
);
1017 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1018 if (dynsym_count
< 0)
1020 do_cleanups (back_to
);
1024 /* Enter dynamic symbols into the minimal symbol table
1025 if this is a stripped executable. */
1026 if (bfd_get_symcount (abfd
) <= 0)
1029 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1031 asymbol
*sym
= *symptr
;
1035 sec
= bfd_get_section (sym
);
1037 /* BFD symbols are section relative. */
1038 sym_value
= sym
->value
+ sec
->vma
;
1040 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1042 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1045 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1047 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1050 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1052 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS (objfile
));
1058 if (sym
->flags
& BSF_GLOBAL
)
1061 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1066 /* Symbols from shared libraries have a dynamic relocation entry
1067 that points to the associated slot in the procedure linkage table.
1068 We make a mininal symbol table entry with type mst_solib_trampoline
1069 at the address in the procedure linkage table. */
1070 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1071 if (dynrel_size
< 0)
1073 do_cleanups (back_to
);
1077 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1078 make_cleanup (xfree
, dynrels
);
1080 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1081 if (dynrel_count
< 0)
1083 do_cleanups (back_to
);
1087 for (counter
= 0, relptr
= dynrels
;
1088 counter
< dynrel_count
;
1089 counter
++, relptr
++)
1091 arelent
*rel
= *relptr
;
1093 rel
->address
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1095 switch (bfd_get_arch (abfd
))
1097 case bfd_arch_sparc
:
1098 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1102 /* `16' is the type BFD produces for a jump table relocation. */
1103 if (rel
->howto
->type
!= 16)
1106 /* Adjust address in the jump table to point to
1107 the start of the bsr instruction. */
1114 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1115 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1119 do_cleanups (back_to
);
1122 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1124 find_stab_function_addr (char *namestring
, char *filename
,
1125 struct objfile
*objfile
)
1127 struct minimal_symbol
*msym
;
1131 p
= strchr (namestring
, ':');
1136 strncpy (p
, namestring
, n
);
1139 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1142 /* Sun Fortran appends an underscore to the minimal symbol name,
1143 try again with an appended underscore if the minimal symbol
1147 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1150 if (msym
== NULL
&& filename
!= NULL
)
1152 /* Try again without the filename. */
1154 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1156 if (msym
== NULL
&& filename
!= NULL
)
1158 /* And try again for Sun Fortran, but without the filename. */
1161 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1164 return msym
== NULL
? 0 : SYMBOL_VALUE_ADDRESS (msym
);
1166 #endif /* SOFUN_ADDRESS_MAYBE_MISSING */
1169 function_outside_compilation_unit_complaint (const char *arg1
)
1171 complaint (&symfile_complaints
,
1172 "function `%s' appears to be defined outside of all compilation units",
1176 /* Setup partial_symtab's describing each source file for which
1177 debugging information is available. */
1180 read_dbx_symtab (struct objfile
*objfile
)
1182 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1183 struct internal_nlist nlist
;
1184 CORE_ADDR text_addr
;
1189 int past_first_source_file
= 0;
1190 CORE_ADDR last_o_file_start
= 0;
1191 CORE_ADDR last_function_start
= 0;
1192 struct cleanup
*back_to
;
1194 int textlow_not_set
;
1195 int data_sect_index
;
1197 /* Current partial symtab */
1198 struct partial_symtab
*pst
;
1200 /* List of current psymtab's include files */
1201 char **psymtab_include_list
;
1202 int includes_allocated
;
1205 /* Index within current psymtab dependency list */
1206 struct partial_symtab
**dependency_list
;
1207 int dependencies_used
, dependencies_allocated
;
1209 text_addr
= DBX_TEXT_ADDR (objfile
);
1210 text_size
= DBX_TEXT_SIZE (objfile
);
1212 /* FIXME. We probably want to change stringtab_global rather than add this
1213 while processing every symbol entry. FIXME. */
1214 file_string_table_offset
= 0;
1215 next_file_string_table_offset
= 0;
1217 stringtab_global
= DBX_STRINGTAB (objfile
);
1219 pst
= (struct partial_symtab
*) 0;
1221 includes_allocated
= 30;
1223 psymtab_include_list
= (char **) alloca (includes_allocated
*
1226 dependencies_allocated
= 30;
1227 dependencies_used
= 0;
1229 (struct partial_symtab
**) alloca (dependencies_allocated
*
1230 sizeof (struct partial_symtab
*));
1232 /* Init bincl list */
1233 init_bincl_list (20, objfile
);
1234 back_to
= make_cleanup_free_bincl_list (objfile
);
1236 last_source_file
= NULL
;
1238 lowest_text_address
= (CORE_ADDR
) -1;
1240 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1241 abfd
= objfile
->obfd
;
1242 symbuf_end
= symbuf_idx
= 0;
1243 next_symbol_text_func
= dbx_next_symbol_text
;
1244 textlow_not_set
= 1;
1245 has_line_numbers
= 0;
1247 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1248 to global and static variables. The stab for a global or static
1249 variable doesn't give us any indication of which section it's in,
1250 so we can't tell immediately which offset in
1251 objfile->section_offsets we should apply to the variable's
1254 We could certainly find out which section contains the variable
1255 by looking up the variable's unrelocated address with
1256 find_pc_section, but that would be expensive; this is the
1257 function that constructs the partial symbol tables by examining
1258 every symbol in the entire executable, and it's
1259 performance-critical. So that expense would not be welcome. I'm
1260 not sure what to do about this at the moment.
1262 What we have done for years is to simply assume that the .data
1263 section's offset is appropriate for all global and static
1264 variables. Recently, this was expanded to fall back to the .bss
1265 section's offset if there is no .data section, and then to the
1266 .rodata section's offset. */
1267 data_sect_index
= objfile
->sect_index_data
;
1268 if (data_sect_index
== -1)
1269 data_sect_index
= SECT_OFF_BSS (objfile
);
1270 if (data_sect_index
== -1)
1271 data_sect_index
= SECT_OFF_RODATA (objfile
);
1273 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1274 for the file to have no .data, no .bss, and no .text at all, if
1275 it also has no global or static variables. If it does, we will
1276 get an internal error from an ANOFFSET macro below when we try to
1277 use data_sect_index. */
1279 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1281 /* Get the symbol for this run and pull out some info */
1282 QUIT
; /* allow this to be interruptable */
1283 if (symbuf_idx
== symbuf_end
)
1285 bufp
= &symbuf
[symbuf_idx
++];
1288 * Special case to speed up readin.
1290 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1292 has_line_numbers
= 1;
1296 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1297 OBJSTAT (objfile
, n_stabs
++);
1299 /* Ok. There is a lot of code duplicated in the rest of this
1300 switch statement (for efficiency reasons). Since I don't
1301 like duplicating code, I will do my penance here, and
1302 describe the code which is duplicated:
1304 *) The assignment to namestring.
1305 *) The call to strchr.
1306 *) The addition of a partial symbol the the two partial
1307 symbol lists. This last is a large section of code, so
1308 I've imbedded it in the following macro.
1311 switch (nlist
.n_type
)
1315 * Standard, external, non-debugger, symbols
1318 case N_TEXT
| N_EXT
:
1319 case N_NBTEXT
| N_EXT
:
1320 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1323 case N_DATA
| N_EXT
:
1324 case N_NBDATA
| N_EXT
:
1325 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1330 case N_NBBSS
| N_EXT
:
1331 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1332 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS (objfile
));
1337 namestring
= set_namestring (objfile
, nlist
);
1340 record_minimal_symbol (namestring
, nlist
.n_value
,
1341 nlist
.n_type
, objfile
); /* Always */
1344 /* Standard, local, non-debugger, symbols */
1348 /* We need to be able to deal with both N_FN or N_TEXT,
1349 because we have no way of knowing whether the sys-supplied ld
1350 or GNU ld was used to make the executable. Sequents throw
1351 in another wrinkle -- they renumbered N_FN. */
1356 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1357 namestring
= set_namestring (objfile
, nlist
);
1359 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1360 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1361 && namestring
[nsl
- 2] == '.'))
1363 if (objfile
->ei
.entry_point
< nlist
.n_value
&&
1364 objfile
->ei
.entry_point
>= last_o_file_start
)
1366 objfile
->ei
.deprecated_entry_file_lowpc
= last_o_file_start
;
1367 objfile
->ei
.deprecated_entry_file_highpc
= nlist
.n_value
;
1369 if (past_first_source_file
&& pst
1370 /* The gould NP1 uses low values for .o and -l symbols
1371 which are not the address. */
1372 && nlist
.n_value
>= pst
->textlow
)
1374 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1375 symnum
* symbol_size
,
1376 nlist
.n_value
> pst
->texthigh
1377 ? nlist
.n_value
: pst
->texthigh
,
1378 dependency_list
, dependencies_used
, textlow_not_set
);
1379 pst
= (struct partial_symtab
*) 0;
1381 dependencies_used
= 0;
1384 past_first_source_file
= 1;
1385 last_o_file_start
= nlist
.n_value
;
1392 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1395 case N_UNDF
| N_EXT
:
1396 if (nlist
.n_value
!= 0)
1398 /* This is a "Fortran COMMON" symbol. See if the target
1399 environment knows where it has been relocated to. */
1403 namestring
= set_namestring (objfile
, nlist
);
1404 if (target_lookup_symbol (namestring
, &reladdr
))
1406 continue; /* Error in lookup; ignore symbol for now. */
1408 nlist
.n_type
^= (N_BSS
^ N_UNDF
); /* Define it as a bss-symbol */
1409 nlist
.n_value
= reladdr
;
1410 goto bss_ext_symbol
;
1412 continue; /* Just undefined, not COMMON */
1415 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1417 /* Deal with relative offsets in the string table
1418 used in ELF+STAB under Solaris. If we want to use the
1419 n_strx field, which contains the name of the file,
1420 we must adjust file_string_table_offset *before* calling
1421 set_namestring(). */
1422 past_first_source_file
= 1;
1423 file_string_table_offset
= next_file_string_table_offset
;
1424 next_file_string_table_offset
=
1425 file_string_table_offset
+ nlist
.n_value
;
1426 if (next_file_string_table_offset
< file_string_table_offset
)
1427 error ("string table offset backs up at %d", symnum
);
1428 /* FIXME -- replace error() with complaint. */
1433 /* Lots of symbol types we can just ignore. */
1440 /* Keep going . . . */
1443 * Special symbol types for GNU
1446 case N_INDR
| N_EXT
:
1448 case N_SETA
| N_EXT
:
1450 case N_SETT
| N_EXT
:
1452 case N_SETD
| N_EXT
:
1454 case N_SETB
| N_EXT
:
1465 static int prev_so_symnum
= -10;
1466 static int first_so_symnum
;
1468 int prev_textlow_not_set
;
1470 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1472 prev_textlow_not_set
= textlow_not_set
;
1474 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1475 /* A zero value is probably an indication for the SunPRO 3.0
1476 compiler. end_psymtab explicitly tests for zero, so
1477 don't relocate it. */
1479 if (nlist
.n_value
== 0)
1481 textlow_not_set
= 1;
1485 textlow_not_set
= 0;
1487 textlow_not_set
= 0;
1489 past_first_source_file
= 1;
1491 if (prev_so_symnum
!= symnum
- 1)
1492 { /* Here if prev stab wasn't N_SO */
1493 first_so_symnum
= symnum
;
1497 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1498 symnum
* symbol_size
,
1499 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1500 dependency_list
, dependencies_used
,
1501 prev_textlow_not_set
);
1502 pst
= (struct partial_symtab
*) 0;
1504 dependencies_used
= 0;
1508 prev_so_symnum
= symnum
;
1510 /* End the current partial symtab and start a new one */
1512 namestring
= set_namestring (objfile
, nlist
);
1514 /* Null name means end of .o file. Don't start a new one. */
1515 if (*namestring
== '\000')
1518 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1519 The first one is a directory name; the second the file name.
1520 If pst exists, is empty, and has a filename ending in '/',
1521 we assume the previous N_SO was a directory name. */
1523 p
= strrchr (namestring
, '/');
1524 if (p
&& *(p
+ 1) == '\000')
1525 continue; /* Simply ignore directory name SOs */
1527 /* Some other compilers (C++ ones in particular) emit useless
1528 SOs for non-existant .c files. We ignore all subsequent SOs that
1529 immediately follow the first. */
1532 pst
= start_psymtab (objfile
,
1534 first_so_symnum
* symbol_size
,
1535 objfile
->global_psymbols
.next
,
1536 objfile
->static_psymbols
.next
);
1542 enum language tmp_language
;
1543 /* Add this bincl to the bincl_list for future EXCLs. No
1544 need to save the string; it'll be around until
1545 read_dbx_symtab function returns */
1547 namestring
= set_namestring (objfile
, nlist
);
1548 tmp_language
= deduce_language_from_filename (namestring
);
1550 /* Only change the psymtab's language if we've learned
1551 something useful (eg. tmp_language is not language_unknown).
1552 In addition, to match what start_subfile does, never change
1554 if (tmp_language
!= language_unknown
1555 && (tmp_language
!= language_c
1556 || psymtab_language
!= language_cplus
))
1557 psymtab_language
= tmp_language
;
1561 /* FIXME: we should not get here without a PST to work on.
1562 Attempt to recover. */
1563 complaint (&symfile_complaints
,
1564 "N_BINCL %s not in entries for any file, at symtab pos %d",
1565 namestring
, symnum
);
1568 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1570 /* Mark down an include file in the current psymtab */
1572 goto record_include_file
;
1577 enum language tmp_language
;
1578 /* Mark down an include file in the current psymtab */
1580 namestring
= set_namestring (objfile
, nlist
);
1581 tmp_language
= deduce_language_from_filename (namestring
);
1583 /* Only change the psymtab's language if we've learned
1584 something useful (eg. tmp_language is not language_unknown).
1585 In addition, to match what start_subfile does, never change
1587 if (tmp_language
!= language_unknown
1588 && (tmp_language
!= language_c
1589 || psymtab_language
!= language_cplus
))
1590 psymtab_language
= tmp_language
;
1592 /* In C++, one may expect the same filename to come round many
1593 times, when code is coming alternately from the main file
1594 and from inline functions in other files. So I check to see
1595 if this is a file we've seen before -- either the main
1596 source file, or a previously included file.
1598 This seems to be a lot of time to be spending on N_SOL, but
1599 things like "break c-exp.y:435" need to work (I
1600 suppose the psymtab_include_list could be hashed or put
1601 in a binary tree, if profiling shows this is a major hog). */
1602 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
1606 for (i
= 0; i
< includes_used
; i
++)
1607 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
1616 record_include_file
:
1618 psymtab_include_list
[includes_used
++] = namestring
;
1619 if (includes_used
>= includes_allocated
)
1621 char **orig
= psymtab_include_list
;
1623 psymtab_include_list
= (char **)
1624 alloca ((includes_allocated
*= 2) *
1626 memcpy (psymtab_include_list
, orig
,
1627 includes_used
* sizeof (char *));
1631 case N_LSYM
: /* Typedef or automatic variable. */
1632 case N_STSYM
: /* Data seg var -- static */
1633 case N_LCSYM
: /* BSS " */
1634 case N_ROSYM
: /* Read-only data seg var -- static. */
1635 case N_NBSTS
: /* Gould nobase. */
1636 case N_NBLCS
: /* symbols. */
1638 case N_GSYM
: /* Global (extern) variable; can be
1639 data or bss (sigh FIXME). */
1641 /* Following may probably be ignored; I'll leave them here
1642 for now (until I do Pascal and Modula 2 extensions). */
1644 case N_PC
: /* I may or may not need this; I
1646 case N_M2C
: /* I suspect that I can ignore this here. */
1647 case N_SCOPE
: /* Same. */
1649 namestring
= set_namestring (objfile
, nlist
);
1651 /* See if this is an end of function stab. */
1652 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1656 /* It's value is the size (in bytes) of the function for
1657 function relative stabs, or the address of the function's
1658 end for old style stabs. */
1659 valu
= nlist
.n_value
+ last_function_start
;
1660 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1661 pst
->texthigh
= valu
;
1665 p
= (char *) strchr (namestring
, ':');
1667 continue; /* Not a debugging symbol. */
1671 /* Main processing section for debugging symbols which
1672 the initial read through the symbol tables needs to worry
1673 about. If we reach this point, the symbol which we are
1674 considering is definitely one we are interested in.
1675 p must also contain the (valid) index into the namestring
1676 which indicates the debugging type symbol. */
1681 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, data_sect_index
);
1682 #ifdef STATIC_TRANSFORM_NAME
1683 namestring
= STATIC_TRANSFORM_NAME (namestring
);
1685 add_psymbol_to_list (namestring
, p
- namestring
,
1686 VAR_DOMAIN
, LOC_STATIC
,
1687 &objfile
->static_psymbols
,
1689 psymtab_language
, objfile
);
1692 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, data_sect_index
);
1693 /* The addresses in these entries are reported to be
1694 wrong. See the code that reads 'G's for symtabs. */
1695 add_psymbol_to_list (namestring
, p
- namestring
,
1696 VAR_DOMAIN
, LOC_STATIC
,
1697 &objfile
->global_psymbols
,
1699 psymtab_language
, objfile
);
1703 /* When a 'T' entry is defining an anonymous enum, it
1704 may have a name which is the empty string, or a
1705 single space. Since they're not really defining a
1706 symbol, those shouldn't go in the partial symbol
1707 table. We do pick up the elements of such enums at
1708 'check_enum:', below. */
1709 if (p
>= namestring
+ 2
1710 || (p
== namestring
+ 1
1711 && namestring
[0] != ' '))
1713 add_psymbol_to_list (namestring
, p
- namestring
,
1714 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1715 &objfile
->static_psymbols
,
1717 psymtab_language
, objfile
);
1720 /* Also a typedef with the same name. */
1721 add_psymbol_to_list (namestring
, p
- namestring
,
1722 VAR_DOMAIN
, LOC_TYPEDEF
,
1723 &objfile
->static_psymbols
,
1725 psymtab_language
, objfile
);
1731 if (p
!= namestring
) /* a name is there, not just :T... */
1733 add_psymbol_to_list (namestring
, p
- namestring
,
1734 VAR_DOMAIN
, LOC_TYPEDEF
,
1735 &objfile
->static_psymbols
,
1737 psymtab_language
, objfile
);
1740 /* If this is an enumerated type, we need to
1741 add all the enum constants to the partial symbol
1742 table. This does not cover enums without names, e.g.
1743 "enum {a, b} c;" in C, but fortunately those are
1744 rare. There is no way for GDB to find those from the
1745 enum type without spending too much time on it. Thus
1746 to solve this problem, the compiler needs to put out the
1747 enum in a nameless type. GCC2 does this. */
1749 /* We are looking for something of the form
1750 <name> ":" ("t" | "T") [<number> "="] "e"
1751 {<constant> ":" <value> ","} ";". */
1753 /* Skip over the colon and the 't' or 'T'. */
1755 /* This type may be given a number. Also, numbers can come
1756 in pairs like (0,26). Skip over it. */
1757 while ((*p
>= '0' && *p
<= '9')
1758 || *p
== '(' || *p
== ',' || *p
== ')'
1764 /* The aix4 compiler emits extra crud before the members. */
1767 /* Skip over the type (?). */
1771 /* Skip over the colon. */
1775 /* We have found an enumerated type. */
1776 /* According to comments in read_enum_type
1777 a comma could end it instead of a semicolon.
1778 I don't know where that happens.
1780 while (*p
&& *p
!= ';' && *p
!= ',')
1784 /* Check for and handle cretinous dbx symbol name
1786 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1787 p
= next_symbol_text (objfile
);
1789 /* Point to the character after the name
1790 of the enum constant. */
1791 for (q
= p
; *q
&& *q
!= ':'; q
++)
1793 /* Note that the value doesn't matter for
1794 enum constants in psymtabs, just in symtabs. */
1795 add_psymbol_to_list (p
, q
- p
,
1796 VAR_DOMAIN
, LOC_CONST
,
1797 &objfile
->static_psymbols
, 0,
1798 0, psymtab_language
, objfile
);
1799 /* Point past the name. */
1801 /* Skip over the value. */
1802 while (*p
&& *p
!= ',')
1804 /* Advance past the comma. */
1811 /* Constant, e.g. from "const" in Pascal. */
1812 add_psymbol_to_list (namestring
, p
- namestring
,
1813 VAR_DOMAIN
, LOC_CONST
,
1814 &objfile
->static_psymbols
, nlist
.n_value
,
1815 0, psymtab_language
, objfile
);
1821 int name_len
= p
- namestring
;
1822 char *name
= xmalloc (name_len
+ 1);
1823 memcpy (name
, namestring
, name_len
);
1824 name
[name_len
] = '\0';
1825 function_outside_compilation_unit_complaint (name
);
1828 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1829 /* Kludges for ELF/STABS with Sun ACC */
1830 last_function_name
= namestring
;
1831 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1832 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1833 value for the bottom of the text seg in those cases. */
1834 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1835 SECT_OFF_TEXT (objfile
)))
1837 CORE_ADDR minsym_valu
=
1838 find_stab_function_addr (namestring
, pst
->filename
, objfile
);
1839 /* find_stab_function_addr will return 0 if the minimal
1840 symbol wasn't found. (Unfortunately, this might also
1841 be a valid address.) Anyway, if it *does* return 0,
1842 it is likely that the value was set correctly to begin
1844 if (minsym_valu
!= 0)
1845 nlist
.n_value
= minsym_valu
;
1847 if (pst
&& textlow_not_set
)
1849 pst
->textlow
= nlist
.n_value
;
1850 textlow_not_set
= 0;
1855 /* Keep track of the start of the last function so we
1856 can handle end of function symbols. */
1857 last_function_start
= nlist
.n_value
;
1859 /* In reordered executables this function may lie outside
1860 the bounds created by N_SO symbols. If that's the case
1861 use the address of this function as the low bound for
1862 the partial symbol table. */
1865 || (nlist
.n_value
< pst
->textlow
1867 != ANOFFSET (objfile
->section_offsets
,
1868 SECT_OFF_TEXT (objfile
))))))
1870 pst
->textlow
= nlist
.n_value
;
1871 textlow_not_set
= 0;
1873 add_psymbol_to_list (namestring
, p
- namestring
,
1874 VAR_DOMAIN
, LOC_BLOCK
,
1875 &objfile
->static_psymbols
,
1877 psymtab_language
, objfile
);
1880 /* Global functions were ignored here, but now they
1881 are put into the global psymtab like one would expect.
1882 They're also in the minimal symbol table. */
1886 int name_len
= p
- namestring
;
1887 char *name
= xmalloc (name_len
+ 1);
1888 memcpy (name
, namestring
, name_len
);
1889 name
[name_len
] = '\0';
1890 function_outside_compilation_unit_complaint (name
);
1893 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1894 /* Kludges for ELF/STABS with Sun ACC */
1895 last_function_name
= namestring
;
1896 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1897 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1898 value for the bottom of the text seg in those cases. */
1899 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1900 SECT_OFF_TEXT (objfile
)))
1902 CORE_ADDR minsym_valu
=
1903 find_stab_function_addr (namestring
, pst
->filename
, objfile
);
1904 /* find_stab_function_addr will return 0 if the minimal
1905 symbol wasn't found. (Unfortunately, this might also
1906 be a valid address.) Anyway, if it *does* return 0,
1907 it is likely that the value was set correctly to begin
1909 if (minsym_valu
!= 0)
1910 nlist
.n_value
= minsym_valu
;
1912 if (pst
&& textlow_not_set
)
1914 pst
->textlow
= nlist
.n_value
;
1915 textlow_not_set
= 0;
1920 /* Keep track of the start of the last function so we
1921 can handle end of function symbols. */
1922 last_function_start
= nlist
.n_value
;
1924 /* In reordered executables this function may lie outside
1925 the bounds created by N_SO symbols. If that's the case
1926 use the address of this function as the low bound for
1927 the partial symbol table. */
1930 || (nlist
.n_value
< pst
->textlow
1932 != ANOFFSET (objfile
->section_offsets
,
1933 SECT_OFF_TEXT (objfile
))))))
1935 pst
->textlow
= nlist
.n_value
;
1936 textlow_not_set
= 0;
1938 add_psymbol_to_list (namestring
, p
- namestring
,
1939 VAR_DOMAIN
, LOC_BLOCK
,
1940 &objfile
->global_psymbols
,
1942 psymtab_language
, objfile
);
1945 /* Two things show up here (hopefully); static symbols of
1946 local scope (static used inside braces) or extensions
1947 of structure symbols. We can ignore both. */
1961 case '#': /* for symbol identification (used in live ranges) */
1965 /* It is a C++ nested symbol. We don't need to record it
1966 (I don't think); if we try to look up foo::bar::baz,
1967 then symbols for the symtab containing foo should get
1968 read in, I think. */
1969 /* Someone says sun cc puts out symbols like
1970 /foo/baz/maclib::/usr/local/bin/maclib,
1971 which would get here with a symbol type of ':'. */
1975 /* Unexpected symbol descriptor. The second and subsequent stabs
1976 of a continued stab can show up here. The question is
1977 whether they ever can mimic a normal stab--it would be
1978 nice if not, since we certainly don't want to spend the
1979 time searching to the end of every string looking for
1982 complaint (&symfile_complaints
, "unknown symbol descriptor `%c'",
1985 /* Ignore it; perhaps it is an extension that we don't
1992 namestring
= set_namestring (objfile
, nlist
);
1994 /* Find the corresponding bincl and mark that psymtab on the
1995 psymtab dependency list */
1997 struct partial_symtab
*needed_pst
=
1998 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2000 /* If this include file was defined earlier in this file,
2002 if (needed_pst
== pst
)
2010 for (i
= 0; i
< dependencies_used
; i
++)
2011 if (dependency_list
[i
] == needed_pst
)
2017 /* If it's already in the list, skip the rest. */
2021 dependency_list
[dependencies_used
++] = needed_pst
;
2022 if (dependencies_used
>= dependencies_allocated
)
2024 struct partial_symtab
**orig
= dependency_list
;
2026 (struct partial_symtab
**)
2027 alloca ((dependencies_allocated
*= 2)
2028 * sizeof (struct partial_symtab
*));
2029 memcpy (dependency_list
, orig
,
2031 * sizeof (struct partial_symtab
*)));
2033 fprintf_unfiltered (gdb_stderr
, "Had to reallocate dependency list.\n");
2034 fprintf_unfiltered (gdb_stderr
, "New dependencies allocated: %d\n",
2035 dependencies_allocated
);
2043 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2044 /* Solaris 2 end of module, finish current partial symbol table.
2045 end_psymtab will set pst->texthigh to the proper value, which
2046 is necessary if a module compiled without debugging info
2047 follows this module. */
2050 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2051 symnum
* symbol_size
,
2053 dependency_list
, dependencies_used
, textlow_not_set
);
2054 pst
= (struct partial_symtab
*) 0;
2056 dependencies_used
= 0;
2063 HANDLE_RBRAC (nlist
.n_value
);
2069 case N_SSYM
: /* Claim: Structure or union element.
2070 Hopefully, I can ignore this. */
2071 case N_ENTRY
: /* Alternate entry point; can ignore. */
2072 case N_MAIN
: /* Can definitely ignore this. */
2073 case N_CATCH
: /* These are GNU C++ extensions */
2074 case N_EHDECL
: /* that can safely be ignored here. */
2084 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2085 case N_DEFD
: /* GNU Modula-2 */
2086 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2088 case N_OBJ
: /* useless types from Solaris */
2091 /* These symbols aren't interesting; don't worry about them */
2096 /* If we haven't found it yet, ignore it. It's probably some
2097 new type we don't know about yet. */
2098 unknown_symtype_complaint (local_hex_string (nlist
.n_type
));
2103 /* If there's stuff to be cleaned up, clean it up. */
2104 if (DBX_SYMCOUNT (objfile
) > 0 /* We have some syms */
2105 /*FIXME, does this have a bug at start address 0? */
2106 && last_o_file_start
2107 && objfile
->ei
.entry_point
< nlist
.n_value
2108 && objfile
->ei
.entry_point
>= last_o_file_start
)
2110 objfile
->ei
.deprecated_entry_file_lowpc
= last_o_file_start
;
2111 objfile
->ei
.deprecated_entry_file_highpc
= nlist
.n_value
;
2116 /* Don't set pst->texthigh lower than it already is. */
2117 CORE_ADDR text_end
=
2118 (lowest_text_address
== (CORE_ADDR
) -1
2119 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)))
2120 : lowest_text_address
)
2123 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2124 symnum
* symbol_size
,
2125 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2126 dependency_list
, dependencies_used
, textlow_not_set
);
2129 do_cleanups (back_to
);
2132 /* Allocate and partially fill a partial symtab. It will be
2133 completely filled at the end of the symbol list.
2135 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2136 is the address relative to which its symbols are (incremental) or 0
2140 static struct partial_symtab
*
2141 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2142 int ldsymoff
, struct partial_symbol
**global_syms
,
2143 struct partial_symbol
**static_syms
)
2145 struct partial_symtab
*result
=
2146 start_psymtab_common (objfile
, objfile
->section_offsets
,
2147 filename
, textlow
, global_syms
, static_syms
);
2149 result
->read_symtab_private
= (char *)
2150 obstack_alloc (&objfile
->psymbol_obstack
, sizeof (struct symloc
));
2151 LDSYMOFF (result
) = ldsymoff
;
2152 result
->read_symtab
= dbx_psymtab_to_symtab
;
2153 SYMBOL_SIZE (result
) = symbol_size
;
2154 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2155 STRING_OFFSET (result
) = string_table_offset
;
2156 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2158 /* If we're handling an ELF file, drag some section-relocation info
2159 for this source file out of the ELF symbol table, to compensate for
2160 Sun brain death. This replaces the section_offsets in this psymtab,
2162 elfstab_offset_sections (objfile
, result
);
2164 /* Deduce the source language from the filename for this psymtab. */
2165 psymtab_language
= deduce_language_from_filename (filename
);
2170 /* Close off the current usage of PST.
2171 Returns PST or NULL if the partial symtab was empty and thrown away.
2173 FIXME: List variables and peculiarities of same. */
2175 struct partial_symtab
*
2176 end_psymtab (struct partial_symtab
*pst
, char **include_list
, int num_includes
,
2177 int capping_symbol_offset
, CORE_ADDR capping_text
,
2178 struct partial_symtab
**dependency_list
, int number_dependencies
,
2179 int textlow_not_set
)
2182 struct objfile
*objfile
= pst
->objfile
;
2184 if (capping_symbol_offset
!= -1)
2185 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2186 pst
->texthigh
= capping_text
;
2188 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2189 /* Under Solaris, the N_SO symbols always have a value of 0,
2190 instead of the usual address of the .o file. Therefore,
2191 we have to do some tricks to fill in texthigh and textlow.
2192 The first trick is: if we see a static
2193 or global function, and the textlow for the current pst
2194 is not set (ie: textlow_not_set), then we use that function's
2195 address for the textlow of the pst. */
2197 /* Now, to fill in texthigh, we remember the last function seen
2198 in the .o file. Also, there's a hack in
2199 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2200 to here via the misc_info field. Therefore, we can fill in
2201 a reliable texthigh by taking the address plus size of the
2202 last function in the file. */
2204 if (pst
->texthigh
== 0 && last_function_name
)
2208 struct minimal_symbol
*minsym
;
2210 p
= strchr (last_function_name
, ':');
2212 p
= last_function_name
;
2213 n
= p
- last_function_name
;
2215 strncpy (p
, last_function_name
, n
);
2218 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2221 /* Sun Fortran appends an underscore to the minimal symbol name,
2222 try again with an appended underscore if the minimal symbol
2226 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2230 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
2232 last_function_name
= NULL
;
2235 /* this test will be true if the last .o file is only data */
2236 if (textlow_not_set
)
2237 pst
->textlow
= pst
->texthigh
;
2240 struct partial_symtab
*p1
;
2242 /* If we know our own starting text address, then walk through all other
2243 psymtabs for this objfile, and if any didn't know their ending text
2244 address, set it to our starting address. Take care to not set our
2245 own ending address to our starting address, nor to set addresses on
2246 `dependency' files that have both textlow and texthigh zero. */
2248 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2250 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2252 p1
->texthigh
= pst
->textlow
;
2253 /* if this file has only data, then make textlow match texthigh */
2254 if (p1
->textlow
== 0)
2255 p1
->textlow
= p1
->texthigh
;
2260 /* End of kludge for patching Solaris textlow and texthigh. */
2261 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
2263 pst
->n_global_syms
=
2264 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2265 pst
->n_static_syms
=
2266 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2268 pst
->number_of_dependencies
= number_dependencies
;
2269 if (number_dependencies
)
2271 pst
->dependencies
= (struct partial_symtab
**)
2272 obstack_alloc (&objfile
->psymbol_obstack
,
2273 number_dependencies
* sizeof (struct partial_symtab
*));
2274 memcpy (pst
->dependencies
, dependency_list
,
2275 number_dependencies
* sizeof (struct partial_symtab
*));
2278 pst
->dependencies
= 0;
2280 for (i
= 0; i
< num_includes
; i
++)
2282 struct partial_symtab
*subpst
=
2283 allocate_psymtab (include_list
[i
], objfile
);
2285 /* Copy the sesction_offsets array from the main psymtab. */
2286 subpst
->section_offsets
= pst
->section_offsets
;
2287 subpst
->read_symtab_private
=
2288 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
2289 sizeof (struct symloc
));
2293 subpst
->texthigh
= 0;
2295 /* We could save slight bits of space by only making one of these,
2296 shared by the entire set of include files. FIXME-someday. */
2297 subpst
->dependencies
= (struct partial_symtab
**)
2298 obstack_alloc (&objfile
->psymbol_obstack
,
2299 sizeof (struct partial_symtab
*));
2300 subpst
->dependencies
[0] = pst
;
2301 subpst
->number_of_dependencies
= 1;
2303 subpst
->globals_offset
=
2304 subpst
->n_global_syms
=
2305 subpst
->statics_offset
=
2306 subpst
->n_static_syms
= 0;
2310 subpst
->read_symtab
= pst
->read_symtab
;
2313 sort_pst_symbols (pst
);
2315 /* If there is already a psymtab or symtab for a file of this name, remove it.
2316 (If there is a symtab, more drastic things also happen.)
2317 This happens in VxWorks. */
2318 free_named_symtabs (pst
->filename
);
2320 if (num_includes
== 0
2321 && number_dependencies
== 0
2322 && pst
->n_global_syms
== 0
2323 && pst
->n_static_syms
== 0
2324 && has_line_numbers
== 0)
2326 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2327 it is on the obstack, but we can forget to chain it on the list. */
2328 /* Empty psymtabs happen as a result of header files which don't have
2329 any symbols in them. There can be a lot of them. But this check
2330 is wrong, in that a psymtab with N_SLINE entries but nothing else
2331 is not empty, but we don't realize that. Fixing that without slowing
2332 things down might be tricky. */
2334 discard_psymtab (pst
);
2336 /* Indicate that psymtab was thrown away. */
2337 pst
= (struct partial_symtab
*) NULL
;
2343 dbx_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2345 struct cleanup
*old_chain
;
2353 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
2358 /* Read in all partial symtabs on which this one is dependent */
2359 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2360 if (!pst
->dependencies
[i
]->readin
)
2362 /* Inform about additional files that need to be read in. */
2365 fputs_filtered (" ", gdb_stdout
);
2367 fputs_filtered ("and ", gdb_stdout
);
2369 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2370 wrap_here (""); /* Flush output */
2371 gdb_flush (gdb_stdout
);
2373 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2376 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy */
2378 /* Init stuff necessary for reading in symbols */
2381 old_chain
= make_cleanup (really_free_pendings
, 0);
2382 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2383 symbol_size
= SYMBOL_SIZE (pst
);
2385 /* Read in this file's symbols */
2386 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2387 read_ofile_symtab (pst
);
2389 do_cleanups (old_chain
);
2395 /* Read in all of the symbols for a given psymtab for real.
2396 Be verbose about it if the user wants that. */
2399 dbx_psymtab_to_symtab (struct partial_symtab
*pst
)
2402 struct cleanup
*back_to
= NULL
;
2409 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
2414 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
2416 /* Print the message now, before reading the string table,
2417 to avoid disconcerting pauses. */
2420 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2421 gdb_flush (gdb_stdout
);
2424 sym_bfd
= pst
->objfile
->obfd
;
2426 next_symbol_text_func
= dbx_next_symbol_text
;
2428 if (DBX_STAB_SECTION (pst
->objfile
))
2431 = symfile_relocate_debug_section (pst
->objfile
->obfd
,
2432 DBX_STAB_SECTION (pst
->objfile
),
2435 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
2438 dbx_psymtab_to_symtab_1 (pst
);
2441 do_cleanups (back_to
);
2443 /* Match with global symbols. This only needs to be done once,
2444 after all of the symtabs and dependencies have been read in. */
2445 scan_file_globals (pst
->objfile
);
2447 /* Finish up the debug error message. */
2449 printf_filtered ("done.\n");
2453 /* Read in a defined section of a specific object file's symbols. */
2456 read_ofile_symtab (struct partial_symtab
*pst
)
2459 struct external_nlist
*bufp
;
2460 struct internal_nlist nlist
;
2462 unsigned max_symnum
;
2464 struct objfile
*objfile
;
2465 int sym_offset
; /* Offset to start of symbols to read */
2466 int sym_size
; /* Size of symbols to read */
2467 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2468 int text_size
; /* Size of text segment for symbols */
2469 struct section_offsets
*section_offsets
;
2471 objfile
= pst
->objfile
;
2472 sym_offset
= LDSYMOFF (pst
);
2473 sym_size
= LDSYMLEN (pst
);
2474 text_offset
= pst
->textlow
;
2475 text_size
= pst
->texthigh
- pst
->textlow
;
2476 /* This cannot be simply objfile->section_offsets because of
2477 elfstab_offset_sections() which initializes the psymtab section
2478 offsets information in a special way, and that is different from
2479 objfile->section_offsets. */
2480 section_offsets
= pst
->section_offsets
;
2482 current_objfile
= objfile
;
2483 subfile_stack
= NULL
;
2485 stringtab_global
= DBX_STRINGTAB (objfile
);
2486 last_source_file
= NULL
;
2488 abfd
= objfile
->obfd
;
2489 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
2490 symbuf_end
= symbuf_idx
= 0;
2492 symbuf_left
= sym_offset
+ sym_size
;
2494 /* It is necessary to actually read one symbol *before* the start
2495 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2496 occurs before the N_SO symbol.
2498 Detecting this in read_dbx_symtab
2499 would slow down initial readin, so we look for it here instead. */
2500 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2502 stabs_seek (sym_offset
- symbol_size
);
2504 bufp
= &symbuf
[symbuf_idx
++];
2505 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2506 OBJSTAT (objfile
, n_stabs
++);
2508 namestring
= set_namestring (objfile
, nlist
);
2510 processing_gcc_compilation
= 0;
2511 if (nlist
.n_type
== N_TEXT
)
2513 const char *tempstring
= namestring
;
2515 if (DEPRECATED_STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
2516 processing_gcc_compilation
= 1;
2517 else if (DEPRECATED_STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
2518 processing_gcc_compilation
= 2;
2519 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2521 if (DEPRECATED_STREQN (tempstring
, "__gnu_compiled", 14))
2522 processing_gcc_compilation
= 2;
2525 /* Try to select a C++ demangling based on the compilation unit
2529 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2530 know whether it will use the old style or v3 mangling. */
2531 if (processing_gcc_compilation
)
2533 if (AUTO_DEMANGLING
)
2535 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2542 /* The N_SO starting this symtab is the first symbol, so we
2543 better not check the symbol before it. I'm not this can
2544 happen, but it doesn't hurt to check for it. */
2545 stabs_seek (sym_offset
);
2546 processing_gcc_compilation
= 0;
2549 if (symbuf_idx
== symbuf_end
)
2551 bufp
= &symbuf
[symbuf_idx
];
2552 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2553 error ("First symbol in segment of executable not a source symbol");
2555 max_symnum
= sym_size
/ symbol_size
;
2558 symnum
< max_symnum
;
2561 QUIT
; /* Allow this to be interruptable */
2562 if (symbuf_idx
== symbuf_end
)
2564 bufp
= &symbuf
[symbuf_idx
++];
2565 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2566 OBJSTAT (objfile
, n_stabs
++);
2568 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2570 namestring
= set_namestring (objfile
, nlist
);
2574 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2575 namestring
, section_offsets
, objfile
);
2577 /* We skip checking for a new .o or -l file; that should never
2578 happen in this routine. */
2579 else if (type
== N_TEXT
)
2581 /* I don't think this code will ever be executed, because
2582 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2583 the N_SO symbol which starts this source file.
2584 However, there is no reason not to accept
2585 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2587 if (DEPRECATED_STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
2588 processing_gcc_compilation
= 1;
2589 else if (DEPRECATED_STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
2590 processing_gcc_compilation
= 2;
2593 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2594 know whether it will use the old style or v3 mangling. */
2595 if (AUTO_DEMANGLING
)
2597 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2601 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2602 || type
== (unsigned char) N_NBTEXT
2605 /* Global symbol: see if we came across a dbx defintion for
2606 a corresponding symbol. If so, store the value. Remove
2607 syms from the chain when their values are stored, but
2608 search the whole chain, as there may be several syms from
2609 different files with the same name. */
2610 /* This is probably not true. Since the files will be read
2611 in one at a time, each reference to a global symbol will
2612 be satisfied in each file as it appears. So we skip this
2618 current_objfile
= NULL
;
2620 /* In a Solaris elf file, this variable, which comes from the
2621 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2622 which comes from pst->textlow is correct. */
2623 if (last_source_start_addr
== 0)
2624 last_source_start_addr
= text_offset
;
2626 /* In reordered executables last_source_start_addr may not be the
2627 lower bound for this symtab, instead use text_offset which comes
2628 from pst->textlow which is correct. */
2629 if (last_source_start_addr
> text_offset
)
2630 last_source_start_addr
= text_offset
;
2632 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
, SECT_OFF_TEXT (objfile
));
2638 /* This handles a single symbol from the symbol-file, building symbols
2639 into a GDB symtab. It takes these arguments and an implicit argument.
2641 TYPE is the type field of the ".stab" symbol entry.
2642 DESC is the desc field of the ".stab" entry.
2643 VALU is the value field of the ".stab" entry.
2644 NAME is the symbol name, in our address space.
2645 SECTION_OFFSETS is a set of amounts by which the sections of this object
2646 file were relocated when it was loaded into memory.
2647 Note that these section_offsets are not the
2648 objfile->section_offsets but the pst->section_offsets.
2649 All symbols that refer
2650 to memory locations need to be offset by these amounts.
2651 OBJFILE is the object file from which we are reading symbols.
2652 It is used in end_symtab. */
2655 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2656 struct section_offsets
*section_offsets
,
2657 struct objfile
*objfile
)
2659 #ifdef SUN_FIXED_LBRAC_BUG
2660 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
2661 to correct the address of N_LBRAC's. If it is not defined, then
2662 we never need to correct the addresses. */
2664 /* This records the last pc address we've seen. We depend on there being
2665 an SLINE or FUN or SO before the first LBRAC, since the variable does
2666 not get reset in between reads of different symbol files. */
2667 static CORE_ADDR last_pc_address
;
2670 struct context_stack
*new;
2671 /* This remembers the address of the start of a function. It is used
2672 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
2673 relative to the current function's start address. On systems
2674 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
2675 used to relocate these symbol types rather than SECTION_OFFSETS. */
2676 static CORE_ADDR function_start_offset
;
2678 /* This holds the address of the start of a function, without the system
2679 peculiarities of function_start_offset. */
2680 static CORE_ADDR last_function_start
;
2682 /* If this is nonzero, we've seen an N_SLINE since the start of the
2683 current function. We use this to tell us to move the first sline
2684 to the beginning of the function regardless of what its given
2686 static int sline_found_in_function
= 1;
2688 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
2689 file. Used to detect the SunPRO solaris compiler. */
2690 static int n_opt_found
;
2692 /* The stab type used for the definition of the last function.
2693 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2694 static int function_stab_type
= 0;
2696 if (!block_address_function_relative
)
2697 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2698 function start address, so just use the text offset. */
2699 function_start_offset
= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2701 /* Something is wrong if we see real data before
2702 seeing a source file name. */
2704 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
2706 /* Ignore any symbols which appear before an N_SO symbol.
2707 Currently no one puts symbols there, but we should deal
2708 gracefully with the case. A complain()t might be in order,
2709 but this should not be an error (). */
2718 if (*name
== '\000')
2720 /* This N_FUN marks the end of a function. This closes off the
2723 if (context_stack_depth
<= 0)
2725 lbrac_mismatch_complaint (symnum
);
2729 /* The following check is added before recording line 0 at
2730 end of function so as to handle hand-generated stabs
2731 which may have an N_FUN stabs at the end of the function, but
2732 no N_SLINE stabs. */
2733 if (sline_found_in_function
)
2734 record_line (current_subfile
, 0, last_function_start
+ valu
);
2736 within_function
= 0;
2737 new = pop_context ();
2739 /* Make a block for the local symbols within. */
2740 finish_block (new->name
, &local_symbols
, new->old_blocks
,
2741 new->start_addr
, new->start_addr
+ valu
,
2744 /* May be switching to an assembler file which may not be using
2745 block relative stabs, so reset the offset. */
2746 if (block_address_function_relative
)
2747 function_start_offset
= 0;
2752 sline_found_in_function
= 0;
2754 /* Relocate for dynamic loading */
2755 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2756 valu
= SMASH_TEXT_ADDRESS (valu
);
2757 last_function_start
= valu
;
2759 goto define_a_symbol
;
2762 /* This "symbol" just indicates the start of an inner lexical
2763 context within a function. */
2765 /* Ignore extra outermost context from SunPRO cc and acc. */
2766 if (n_opt_found
&& desc
== 1)
2769 if (block_address_function_relative
)
2770 /* Relocate for Sun ELF acc fn-relative syms. */
2771 valu
+= function_start_offset
;
2773 /* On most machines, the block addresses are relative to the
2774 N_SO, the linker did not relocate them (sigh). */
2775 valu
+= last_source_start_addr
;
2777 #ifdef SUN_FIXED_LBRAC_BUG
2778 if (!SUN_FIXED_LBRAC_BUG
&& valu
< last_pc_address
)
2780 /* Patch current LBRAC pc value to match last handy pc value */
2781 complaint (&symfile_complaints
, "bad block start address patched");
2782 valu
= last_pc_address
;
2785 new = push_context (desc
, valu
);
2789 /* This "symbol" just indicates the end of an inner lexical
2790 context that was started with N_LBRAC. */
2792 /* Ignore extra outermost context from SunPRO cc and acc. */
2793 if (n_opt_found
&& desc
== 1)
2796 if (block_address_function_relative
)
2797 /* Relocate for Sun ELF acc fn-relative syms. */
2798 valu
+= function_start_offset
;
2800 /* On most machines, the block addresses are relative to the
2801 N_SO, the linker did not relocate them (sigh). */
2802 valu
+= last_source_start_addr
;
2804 if (context_stack_depth
<= 0)
2806 lbrac_mismatch_complaint (symnum
);
2810 new = pop_context ();
2811 if (desc
!= new->depth
)
2812 lbrac_mismatch_complaint (symnum
);
2814 /* Some compilers put the variable decls inside of an
2815 LBRAC/RBRAC block. This macro should be nonzero if this
2816 is true. DESC is N_DESC from the N_RBRAC symbol.
2817 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
2818 or the GCC2_COMPILED_SYMBOL. */
2819 #if !defined (VARIABLES_INSIDE_BLOCK)
2820 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2823 /* Can only use new->locals as local symbols here if we're in
2824 gcc or on a machine that puts them before the lbrack. */
2825 if (!VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2827 if (local_symbols
!= NULL
)
2829 /* GCC development snapshots from March to December of
2830 2000 would output N_LSYM entries after N_LBRAC
2831 entries. As a consequence, these symbols are simply
2832 discarded. Complain if this is the case. Note that
2833 there are some compilers which legitimately put local
2834 symbols within an LBRAC/RBRAC block; this complaint
2835 might also help sort out problems in which
2836 VARIABLES_INSIDE_BLOCK is incorrectly defined. */
2837 complaint (&symfile_complaints
,
2838 "misplaced N_LBRAC entry; discarding local symbols which have no enclosing block");
2840 local_symbols
= new->locals
;
2843 if (context_stack_depth
2844 > !VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2846 /* This is not the outermost LBRAC...RBRAC pair in the function,
2847 its local symbols preceded it, and are the ones just recovered
2848 from the context stack. Define the block for them (but don't
2849 bother if the block contains no symbols. Should we complain
2850 on blocks without symbols? I can't think of any useful purpose
2852 if (local_symbols
!= NULL
)
2854 /* Muzzle a compiler bug that makes end < start. (which
2855 compilers? Is this ever harmful?). */
2856 if (new->start_addr
> valu
)
2858 complaint (&symfile_complaints
,
2859 "block start larger than block end");
2860 new->start_addr
= valu
;
2862 /* Make a block for the local symbols within. */
2863 finish_block (0, &local_symbols
, new->old_blocks
,
2864 new->start_addr
, valu
, objfile
);
2869 /* This is the outermost LBRAC...RBRAC pair. There is no
2870 need to do anything; leave the symbols that preceded it
2871 to be attached to the function's own block. We need to
2872 indicate that we just moved outside of the function. */
2873 within_function
= 0;
2876 if (VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2877 /* Now pop locals of block just finished. */
2878 local_symbols
= new->locals
;
2883 /* This kind of symbol indicates the start of an object file. */
2884 /* Relocate for dynamic loading */
2885 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2889 /* This type of symbol indicates the start of data
2890 for one source file.
2891 Finish the symbol table of the previous source file
2892 (if any) and start accumulating a new symbol table. */
2893 /* Relocate for dynamic loading */
2894 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2898 #ifdef SUN_FIXED_LBRAC_BUG
2899 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2902 #ifdef PCC_SOL_BROKEN
2903 /* pcc bug, occasionally puts out SO for SOL. */
2904 if (context_stack_depth
> 0)
2906 start_subfile (name
, NULL
);
2910 if (last_source_file
)
2912 /* Check if previous symbol was also an N_SO (with some
2913 sanity checks). If so, that one was actually the directory
2914 name, and the current one is the real file name.
2916 if (previous_stab_code
== (unsigned char) N_SO
)
2918 patch_subfile_names (current_subfile
, name
);
2919 break; /* Ignore repeated SOs */
2921 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2925 /* Null name means this just marks the end of text for this .o file.
2926 Don't start a new symtab in this case. */
2927 if (*name
== '\000')
2930 if (block_address_function_relative
)
2931 function_start_offset
= 0;
2934 start_symtab (name
, NULL
, valu
);
2935 record_debugformat ("stabs");
2939 /* This type of symbol indicates the start of data for
2940 a sub-source-file, one whose contents were copied or
2941 included in the compilation of the main source file
2942 (whose name was given in the N_SO symbol.) */
2943 /* Relocate for dynamic loading */
2944 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2945 start_subfile (name
, current_subfile
->dirname
);
2950 add_new_header_file (name
, valu
);
2951 start_subfile (name
, current_subfile
->dirname
);
2955 start_subfile (pop_subfile (), current_subfile
->dirname
);
2959 add_old_header_file (name
, valu
);
2963 /* This type of "symbol" really just records
2964 one line-number -- core-address correspondence.
2965 Enter it in the line list for this symbol table. */
2967 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
2968 valu
+= function_start_offset
;
2970 #ifdef SUN_FIXED_LBRAC_BUG
2971 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2973 /* If this is the first SLINE note in the function, record it at
2974 the start of the function instead of at the listed location. */
2975 if (within_function
&& sline_found_in_function
== 0)
2977 record_line (current_subfile
, desc
, last_function_start
);
2978 sline_found_in_function
= 1;
2981 record_line (current_subfile
, desc
, valu
);
2985 common_block_start (name
, objfile
);
2989 common_block_end (objfile
);
2992 /* The following symbol types need to have the appropriate offset added
2993 to their value; then we process symbol definitions in the name. */
2995 case N_STSYM
: /* Static symbol in data seg */
2996 case N_LCSYM
: /* Static symbol in BSS seg */
2997 case N_ROSYM
: /* Static symbol in Read-only data seg */
2998 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2999 Solaris2's stabs-in-elf makes *most* symbols relative
3000 but leaves a few absolute (at least for Solaris 2.1 and version
3001 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
3002 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
3003 .stab "foo:V...",N_STSYM is relative (section base subtracted).
3004 This leaves us no choice but to search for the 'S' or 'V'...
3005 (or pass the whole section_offsets stuff down ONE MORE function
3006 call level, which we really don't want to do). */
3010 /* .o files and NLMs have non-zero text seg offsets, but don't need
3011 their static syms offset in this fashion. XXX - This is really a
3012 crock that should be fixed in the solib handling code so that I
3013 don't have to work around it here. */
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* want
3022 to add whatever solib.c passed to symbol_file_add as
3023 addr (this is known to affect SunOS4, and I suspect ELF
3024 too). Since elfstab_offset_sections currently does not
3025 muck with the text offset (there is no Ttext.text
3026 symbol), we can get addr from the text offset. If
3027 elfstab_offset_sections ever starts dealing with the
3028 text offset, and we still need to do this, we need to
3029 invent a SECT_OFF_ADDR_KLUDGE or something. */
3030 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3031 goto define_a_symbol
;
3034 /* Since it's not the kludge case, re-dispatch to the right handler. */
3044 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
3048 case_N_STSYM
: /* Static symbol in data seg */
3049 case N_DSLINE
: /* Source line number, data seg */
3050 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3051 goto define_a_symbol
;
3053 case_N_LCSYM
: /* Static symbol in BSS seg */
3054 case N_BSLINE
: /* Source line number, bss seg */
3055 /* N_BROWS: overlaps with N_BSLINE */
3056 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3057 goto define_a_symbol
;
3059 case_N_ROSYM
: /* Static symbol in Read-only data seg */
3060 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3061 goto define_a_symbol
;
3063 case N_ENTRY
: /* Alternate entry point */
3064 /* Relocate for dynamic loading */
3065 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3066 goto define_a_symbol
;
3068 /* The following symbol types we don't know how to process. Handle
3069 them in a "default" way, but complain to people who care. */
3071 case N_CATCH
: /* Exception handler catcher */
3072 case N_EHDECL
: /* Exception handler name */
3073 case N_PC
: /* Global symbol in Pascal */
3074 case N_M2C
: /* Modula-2 compilation unit */
3075 /* N_MOD2: overlaps with N_EHDECL */
3076 case N_SCOPE
: /* Modula-2 scope information */
3077 case N_ECOML
: /* End common (local name) */
3078 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3083 unknown_symtype_complaint (local_hex_string (type
));
3086 /* The following symbol types don't need the address field relocated,
3087 since it is either unused, or is absolute. */
3089 case N_GSYM
: /* Global variable */
3090 case N_NSYMS
: /* Number of symbols (ultrix) */
3091 case N_NOMAP
: /* No map? (ultrix) */
3092 case N_RSYM
: /* Register variable */
3093 case N_DEFD
: /* Modula-2 GNU module dependency */
3094 case N_SSYM
: /* Struct or union element */
3095 case N_LSYM
: /* Local symbol in stack */
3096 case N_PSYM
: /* Parameter variable */
3097 case N_LENG
: /* Length of preceding symbol type */
3101 char *colon_pos
= strchr (name
, ':');
3102 if (colon_pos
== NULL
)
3105 deftype
= colon_pos
[1];
3111 function_stab_type
= type
;
3113 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
3114 /* Deal with the SunPRO 3.0 compiler which omits the address
3115 from N_FUN symbols. */
3117 && valu
== ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
)))
3119 CORE_ADDR minsym_valu
=
3120 find_stab_function_addr (name
, last_source_file
, objfile
);
3122 /* find_stab_function_addr will return 0 if the minimal
3123 symbol wasn't found. (Unfortunately, this might also
3124 be a valid address.) Anyway, if it *does* return 0,
3125 it is likely that the value was set correctly to begin
3127 if (minsym_valu
!= 0)
3132 #ifdef SUN_FIXED_LBRAC_BUG
3133 /* The Sun acc compiler, under SunOS4, puts out
3134 functions with N_GSYM or N_STSYM. The problem is
3135 that the address of the symbol is no good (for N_GSYM
3136 it doesn't even attept an address; for N_STSYM it
3137 puts out an address but then it gets relocated
3138 relative to the data segment, not the text segment).
3139 Currently we can't fix this up later as we do for
3140 some types of symbol in scan_file_globals.
3141 Fortunately we do have a way of finding the address -
3142 we know that the value in last_pc_address is either
3143 the one we want (if we're dealing with the first
3144 function in an object file), or somewhere in the
3145 previous function. This means that we can use the
3146 minimal symbol table to get the address. */
3148 /* Starting with release 3.0, the Sun acc compiler,
3149 under SunOS4, puts out functions with N_FUN and a value
3150 of zero. This gets relocated to the start of the text
3151 segment of the module, which is no good either.
3152 Under SunOS4 we can deal with this as N_SLINE and N_SO
3153 entries contain valid absolute addresses.
3154 Release 3.0 acc also puts out N_OPT entries, which makes
3155 it possible to discern acc from cc or gcc. */
3157 if (type
== N_GSYM
|| type
== N_STSYM
3159 && n_opt_found
&& !block_address_function_relative
))
3161 struct minimal_symbol
*m
;
3162 int l
= colon_pos
- name
;
3164 m
= lookup_minimal_symbol_by_pc (last_pc_address
);
3165 if (m
&& strncmp (DEPRECATED_SYMBOL_NAME (m
), name
, l
) == 0
3166 && DEPRECATED_SYMBOL_NAME (m
)[l
] == '\0')
3167 /* last_pc_address was in this function */
3168 valu
= SYMBOL_VALUE (m
);
3169 else if (m
&& DEPRECATED_SYMBOL_NAME (m
+ 1)
3170 && strncmp (DEPRECATED_SYMBOL_NAME (m
+ 1), name
, l
) == 0
3171 && DEPRECATED_SYMBOL_NAME (m
+ 1)[l
] == '\0')
3172 /* last_pc_address was in last function */
3173 valu
= SYMBOL_VALUE (m
+ 1);
3175 /* Not found - use last_pc_address (for finish_block) */
3176 valu
= last_pc_address
;
3179 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
3182 if (block_address_function_relative
)
3183 /* For Solaris 2.0 compilers, the block addresses and
3184 N_SLINE's are relative to the start of the
3185 function. On normal systems, and when using gcc on
3186 Solaris 2.0, these addresses are just absolute, or
3187 relative to the N_SO, depending on
3188 BLOCK_ADDRESS_ABSOLUTE. */
3189 function_start_offset
= valu
;
3191 within_function
= 1;
3193 if (context_stack_depth
> 1)
3195 complaint (&symfile_complaints
,
3196 "unmatched N_LBRAC before symtab pos %d", symnum
);
3200 if (context_stack_depth
> 0)
3202 new = pop_context ();
3203 /* Make a block for the local symbols within. */
3204 finish_block (new->name
, &local_symbols
, new->old_blocks
,
3205 new->start_addr
, valu
, objfile
);
3208 new = push_context (0, valu
);
3209 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3213 define_symbol (valu
, name
, desc
, type
, objfile
);
3219 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3220 for a bunch of other flags, too. Someday we may parse their
3221 flags; for now we ignore theirs and hope they'll ignore ours. */
3222 case N_OPT
: /* Solaris 2: Compiler options */
3225 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3227 processing_gcc_compilation
= 2;
3228 #if 0 /* Works, but is experimental. -fnf */
3229 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
3230 know whether it will use the old style or v3 mangling. */
3231 if (AUTO_DEMANGLING
)
3233 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
3242 case N_MAIN
: /* Name of main routine. */
3243 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3244 it with a symbol file with "main" and without N_MAIN. I'm
3245 not sure exactly what rule to follow but probably something
3246 like: N_MAIN takes precedence over "main" no matter what
3247 objfile it is in; If there is more than one N_MAIN, choose
3248 the one in the symfile_objfile; If there is more than one
3249 N_MAIN within a given objfile, complain() and choose
3250 arbitrarily. (kingdon) */
3252 set_main_name (name
);
3255 /* The following symbol types can be ignored. */
3256 case N_OBJ
: /* Solaris 2: Object file dir and name */
3257 case N_PATCH
: /* Solaris2: Patch Run Time Checker. */
3258 /* N_UNDF: Solaris 2: file separator mark */
3259 /* N_UNDF: -- we will never encounter it, since we only process one
3260 file's symbols at once. */
3261 case N_ENDM
: /* Solaris 2: End of module */
3262 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3266 /* '#' is a GNU C extension to allow one symbol to refer to another
3269 Generally this is used so that an alias can refer to its main
3273 /* Initialize symbol reference names and determine if this is
3274 a definition. If symbol reference is being defined, go
3275 ahead and add it. Otherwise, just return sym. */
3280 /* If this stab defines a new reference ID that is not on the
3281 reference list, then put it on the reference list.
3283 We go ahead and advance NAME past the reference, even though
3284 it is not strictly necessary at this time. */
3285 refnum
= symbol_reference_defined (&s
);
3287 if (!ref_search (refnum
))
3288 ref_add (refnum
, 0, name
, valu
);
3293 previous_stab_code
= type
;
3296 /* FIXME: The only difference between this and elfstab_build_psymtabs
3297 is the call to install_minimal_symbols for elf, and the support for
3298 split sections. If the differences are really that small, the code
3299 should be shared. */
3301 /* Scan and build partial symbols for an coff symbol file.
3302 The coff file has already been processed to get its minimal symbols.
3304 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3307 OBJFILE is the object file we are reading symbols from.
3308 ADDR is the address relative to which the symbols are (e.g.
3309 the base address of the text segment).
3310 MAINLINE is true if we are reading the main symbol
3311 table (as opposed to a shared lib or dynamically loaded file).
3312 TEXTADDR is the address of the text section.
3313 TEXTSIZE is the size of the text section.
3314 STABSECTS is the list of .stab sections in OBJFILE.
3315 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3316 .stabstr section exists.
3318 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3319 adjusted for coff details. */
3322 coffstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3323 CORE_ADDR textaddr
, unsigned int textsize
,
3324 struct stab_section_list
*stabsects
,
3325 file_ptr stabstroffset
, unsigned int stabstrsize
)
3328 bfd
*sym_bfd
= objfile
->obfd
;
3329 char *name
= bfd_get_filename (sym_bfd
);
3330 struct dbx_symfile_info
*info
;
3331 unsigned int stabsize
;
3333 /* There is already a dbx_symfile_info allocated by our caller.
3334 It might even contain some info from the coff symtab to help us. */
3335 info
= objfile
->sym_stab_info
;
3337 DBX_TEXT_ADDR (objfile
) = textaddr
;
3338 DBX_TEXT_SIZE (objfile
) = textsize
;
3340 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3341 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3342 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3344 if (stabstrsize
> bfd_get_size (sym_bfd
))
3345 error ("ridiculous string table size: %d bytes", stabstrsize
);
3346 DBX_STRINGTAB (objfile
) = (char *)
3347 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+ 1);
3348 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3350 /* Now read in the string table in one big gulp. */
3352 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3354 perror_with_name (name
);
3355 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3356 if (val
!= stabstrsize
)
3357 perror_with_name (name
);
3359 stabsread_new_init ();
3360 buildsym_new_init ();
3361 free_header_files ();
3362 init_header_files ();
3364 processing_acc_compilation
= 1;
3366 /* In a coff file, we've already installed the minimal symbols that came
3367 from the coff (non-stab) symbol table, so always act like an
3368 incremental load here. */
3369 if (stabsects
->next
== NULL
)
3371 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3372 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3373 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3377 struct stab_section_list
*stabsect
;
3379 DBX_SYMCOUNT (objfile
) = 0;
3380 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3382 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3383 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3386 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3388 symbuf_sections
= stabsects
->next
;
3389 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3393 dbx_symfile_read (objfile
, 0);
3396 /* Scan and build partial symbols for an ELF symbol file.
3397 This ELF file has already been processed to get its minimal symbols,
3398 and any DWARF symbols that were in it.
3400 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3403 OBJFILE is the object file we are reading symbols from.
3404 ADDR is the address relative to which the symbols are (e.g.
3405 the base address of the text segment).
3406 MAINLINE is true if we are reading the main symbol
3407 table (as opposed to a shared lib or dynamically loaded file).
3408 STABSECT is the BFD section information for the .stab section.
3409 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3410 .stabstr section exists.
3412 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3413 adjusted for elf details. */
3416 elfstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3418 file_ptr stabstroffset
, unsigned int stabstrsize
)
3421 bfd
*sym_bfd
= objfile
->obfd
;
3422 char *name
= bfd_get_filename (sym_bfd
);
3423 struct dbx_symfile_info
*info
;
3424 struct cleanup
*back_to
= NULL
;
3426 /* There is already a dbx_symfile_info allocated by our caller.
3427 It might even contain some info from the ELF symtab to help us. */
3428 info
= objfile
->sym_stab_info
;
3430 /* Find the first and last text address. dbx_symfile_read seems to
3432 find_text_range (sym_bfd
, objfile
);
3434 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3435 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3436 DBX_SYMCOUNT (objfile
)
3437 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3438 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3439 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3440 DBX_STAB_SECTION (objfile
) = stabsect
;
3442 if (stabstrsize
> bfd_get_size (sym_bfd
))
3443 error ("ridiculous string table size: %d bytes", stabstrsize
);
3444 DBX_STRINGTAB (objfile
) = (char *)
3445 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+ 1);
3446 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3448 /* Now read in the string table in one big gulp. */
3450 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3452 perror_with_name (name
);
3453 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3454 if (val
!= stabstrsize
)
3455 perror_with_name (name
);
3457 stabsread_new_init ();
3458 buildsym_new_init ();
3459 free_header_files ();
3460 init_header_files ();
3462 processing_acc_compilation
= 1;
3465 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3466 stabs_data
= symfile_relocate_debug_section (objfile
->obfd
, stabsect
, NULL
);
3468 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
3470 /* In an elf file, we've already installed the minimal symbols that came
3471 from the elf (non-stab) symbol table, so always act like an
3472 incremental load here. dbx_symfile_read should not generate any new
3473 minimal symbols, since we will have already read the ELF dynamic symbol
3474 table and normal symbol entries won't be in the ".stab" section; but in
3475 case it does, it will install them itself. */
3476 dbx_symfile_read (objfile
, 0);
3479 do_cleanups (back_to
);
3482 /* Scan and build partial symbols for a file with special sections for stabs
3483 and stabstrings. The file has already been processed to get its minimal
3484 symbols, and any other symbols that might be necessary to resolve GSYMs.
3486 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3489 OBJFILE is the object file we are reading symbols from.
3490 ADDR is the address relative to which the symbols are (e.g. the base address
3491 of the text segment).
3492 MAINLINE is true if we are reading the main symbol table (as opposed to a
3493 shared lib or dynamically loaded file).
3494 STAB_NAME is the name of the section that contains the stabs.
3495 STABSTR_NAME is the name of the section that contains the stab strings.
3497 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3500 stabsect_build_psymtabs (struct objfile
*objfile
, int mainline
, char *stab_name
,
3501 char *stabstr_name
, char *text_name
)
3504 bfd
*sym_bfd
= objfile
->obfd
;
3505 char *name
= bfd_get_filename (sym_bfd
);
3507 asection
*stabstrsect
;
3508 asection
*text_sect
;
3510 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3511 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3517 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
3518 stab_name
, stabstr_name
);
3520 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
3521 xmalloc (sizeof (struct dbx_symfile_info
));
3522 memset (objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
3524 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3526 error ("Can't find %s section in symbol file", text_name
);
3527 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3528 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3530 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3531 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3532 / DBX_SYMBOL_SIZE (objfile
);
3533 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3534 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3536 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3537 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile
));
3538 DBX_STRINGTAB (objfile
) = (char *)
3539 obstack_alloc (&objfile
->psymbol_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
3540 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3542 /* Now read in the string table in one big gulp. */
3544 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3545 stabstrsect
, /* bfd section */
3546 DBX_STRINGTAB (objfile
), /* input buffer */
3547 0, /* offset into section */
3548 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
3551 perror_with_name (name
);
3553 stabsread_new_init ();
3554 buildsym_new_init ();
3555 free_header_files ();
3556 init_header_files ();
3558 /* Now, do an incremental load */
3560 processing_acc_compilation
= 1;
3561 dbx_symfile_read (objfile
, 0);
3564 static struct sym_fns aout_sym_fns
=
3566 bfd_target_aout_flavour
,
3567 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
3568 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
3569 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
3570 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
3571 default_symfile_offsets
, /* sym_offsets: parse user's offsets to internal form */
3572 NULL
/* next: pointer to next struct sym_fns */
3576 _initialize_dbxread (void)
3578 add_symtab_fns (&aout_sym_fns
);