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 /* This macro returns the size field of a minimal symbol, which is normally
68 stored in the "info" field. The macro can be overridden for specific
69 targets (e.g. MIPS16) that use the info field for other purposes. */
71 #define MSYMBOL_SIZE(msym) ((long) MSYMBOL_INFO (msym))
75 /* We put a pointer to this structure in the read_symtab_private field
80 /* Offset within the file symbol table of first local symbol for this
85 /* Length (in bytes) of the section of the symbol table devoted to
86 this file's symbols (actually, the section bracketed may contain
87 more than just this file's symbols). If ldsymlen is 0, the only
88 reason for this thing's existence is the dependency list. Nothing
89 else will happen when it is read in. */
93 /* The size of each symbol in the symbol file (in external form). */
97 /* Further information needed to locate the symbols if they are in
102 int file_string_offset
;
105 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
106 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
107 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
108 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
109 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
110 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
111 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
114 /* Remember what we deduced to be the source language of this psymtab. */
116 static enum language psymtab_language
= language_unknown
;
118 /* The BFD for this file -- implicit parameter to next_symbol_text. */
120 static bfd
*symfile_bfd
;
122 /* The size of each symbol in the symbol file (in external form).
123 This is set by dbx_symfile_read when building psymtabs, and by
124 dbx_psymtab_to_symtab when building symtabs. */
126 static unsigned symbol_size
;
128 /* This is the offset of the symbol table in the executable file. */
130 static unsigned symbol_table_offset
;
132 /* This is the offset of the string table in the executable file. */
134 static unsigned string_table_offset
;
136 /* For elf+stab executables, the n_strx field is not a simple index
137 into the string table. Instead, each .o file has a base offset in
138 the string table, and the associated symbols contain offsets from
139 this base. The following two variables contain the base offset for
140 the current and next .o files. */
142 static unsigned int file_string_table_offset
;
143 static unsigned int next_file_string_table_offset
;
145 /* .o and NLM files contain unrelocated addresses which are based at
146 0. When non-zero, this flag disables some of the special cases for
147 Solaris elf+stab text addresses at location 0. */
149 static int symfile_relocatable
= 0;
151 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
152 relative to the function start address. */
154 static int block_address_function_relative
= 0;
156 /* The lowest text address we have yet encountered. This is needed
157 because in an a.out file, there is no header field which tells us
158 what address the program is actually going to be loaded at, so we
159 need to make guesses based on the symbols (which *are* relocated to
160 reflect the address it will be loaded at). */
162 static CORE_ADDR lowest_text_address
;
164 /* Non-zero if there is any line number info in the objfile. Prevents
165 end_psymtab from discarding an otherwise empty psymtab. */
167 static int has_line_numbers
;
169 /* Complaints about the symbols we have encountered. */
172 unknown_symtype_complaint (const char *arg1
)
174 complaint (&symfile_complaints
, "unknown symbol type %s", arg1
);
178 lbrac_mismatch_complaint (int arg1
)
180 complaint (&symfile_complaints
,
181 "N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", arg1
);
185 repeated_header_complaint (const char *arg1
, int arg2
)
187 complaint (&symfile_complaints
,
188 "\"repeated\" header file %s not previously seen, at symtab pos %d",
192 /* find_text_range --- find start and end of loadable code sections
194 The find_text_range function finds the shortest address range that
195 encloses all sections containing executable code, and stores it in
196 objfile's text_addr and text_size members.
198 dbx_symfile_read will use this to finish off the partial symbol
199 table, in some cases. */
202 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
209 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
210 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
212 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
213 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
217 if (sec_start
< start
)
232 error ("Can't find any code sections in symbol file");
234 DBX_TEXT_ADDR (objfile
) = start
;
235 DBX_TEXT_SIZE (objfile
) = end
- start
;
240 /* During initial symbol readin, we need to have a structure to keep
241 track of which psymtabs have which bincls in them. This structure
242 is used during readin to setup the list of dependencies within each
243 partial symbol table. */
245 struct header_file_location
247 char *name
; /* Name of header file */
248 int instance
; /* See above */
249 struct partial_symtab
*pst
; /* Partial symtab that has the
250 BINCL/EINCL defs for this file */
253 /* The actual list and controling variables */
254 static struct header_file_location
*bincl_list
, *next_bincl
;
255 static int bincls_allocated
;
257 /* Local function prototypes */
259 extern void _initialize_dbxread (void);
261 static void read_ofile_symtab (struct partial_symtab
*);
263 static void dbx_psymtab_to_symtab (struct partial_symtab
*);
265 static void dbx_psymtab_to_symtab_1 (struct partial_symtab
*);
267 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
269 static void read_dbx_symtab (struct objfile
*);
271 static void free_bincl_list (struct objfile
*);
273 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
275 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
277 static void init_bincl_list (int, struct objfile
*);
279 static char *dbx_next_symbol_text (struct objfile
*);
281 static void fill_symbuf (bfd
*);
283 static void dbx_symfile_init (struct objfile
*);
285 static void dbx_new_init (struct objfile
*);
287 static void dbx_symfile_read (struct objfile
*, int);
289 static void dbx_symfile_finish (struct objfile
*);
291 static void record_minimal_symbol (char *, CORE_ADDR
, int, struct objfile
*);
293 static void add_new_header_file (char *, int);
295 static void add_old_header_file (char *, int);
297 static void add_this_object_header_file (int);
299 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
301 struct partial_symbol
**,
302 struct partial_symbol
**);
304 /* Free up old header file tables */
307 free_header_files (void)
309 if (this_object_header_files
)
311 xfree (this_object_header_files
);
312 this_object_header_files
= NULL
;
314 n_allocated_this_object_header_files
= 0;
317 /* Allocate new header file tables */
320 init_header_files (void)
322 n_allocated_this_object_header_files
= 10;
323 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
326 /* Add header file number I for this object file
327 at the next successive FILENUM. */
330 add_this_object_header_file (int i
)
332 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
334 n_allocated_this_object_header_files
*= 2;
335 this_object_header_files
336 = (int *) xrealloc ((char *) this_object_header_files
,
337 n_allocated_this_object_header_files
* sizeof (int));
340 this_object_header_files
[n_this_object_header_files
++] = i
;
343 /* Add to this file an "old" header file, one already seen in
344 a previous object file. NAME is the header file's name.
345 INSTANCE is its instance code, to select among multiple
346 symbol tables for the same header file. */
349 add_old_header_file (char *name
, int instance
)
351 struct header_file
*p
= HEADER_FILES (current_objfile
);
354 for (i
= 0; i
< N_HEADER_FILES (current_objfile
); i
++)
355 if (STREQ (p
[i
].name
, name
) && instance
== p
[i
].instance
)
357 add_this_object_header_file (i
);
360 repeated_header_complaint (name
, symnum
);
363 /* Add to this file a "new" header file: definitions for its types follow.
364 NAME is the header file's name.
365 Most often this happens only once for each distinct header file,
366 but not necessarily. If it happens more than once, INSTANCE has
367 a different value each time, and references to the header file
368 use INSTANCE values to select among them.
370 dbx output contains "begin" and "end" markers for each new header file,
371 but at this level we just need to know which files there have been;
372 so we record the file when its "begin" is seen and ignore the "end". */
375 add_new_header_file (char *name
, int instance
)
378 struct header_file
*hfile
;
380 /* Make sure there is room for one more header file. */
382 i
= N_ALLOCATED_HEADER_FILES (current_objfile
);
384 if (N_HEADER_FILES (current_objfile
) == i
)
388 N_ALLOCATED_HEADER_FILES (current_objfile
) = 10;
389 HEADER_FILES (current_objfile
) = (struct header_file
*)
390 xmalloc (10 * sizeof (struct header_file
));
395 N_ALLOCATED_HEADER_FILES (current_objfile
) = i
;
396 HEADER_FILES (current_objfile
) = (struct header_file
*)
397 xrealloc ((char *) HEADER_FILES (current_objfile
),
398 (i
* sizeof (struct header_file
)));
402 /* Create an entry for this header file. */
404 i
= N_HEADER_FILES (current_objfile
)++;
405 hfile
= HEADER_FILES (current_objfile
) + i
;
406 hfile
->name
= savestring (name
, strlen (name
));
407 hfile
->instance
= instance
;
410 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
411 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
413 add_this_object_header_file (i
);
417 static struct type
**
418 explicit_lookup_type (int real_filenum
, int index
)
420 struct header_file
*f
= &HEADER_FILES (current_objfile
)[real_filenum
];
422 if (index
>= f
->length
)
425 f
->vector
= (struct type
**)
426 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
427 memset (&f
->vector
[f
->length
/ 2],
428 '\0', f
->length
* sizeof (struct type
*) / 2);
430 return &f
->vector
[index
];
435 record_minimal_symbol (char *name
, CORE_ADDR address
, int type
,
436 struct objfile
*objfile
)
438 enum minimal_symbol_type ms_type
;
440 asection
*bfd_section
;
446 section
= SECT_OFF_TEXT (objfile
);
447 bfd_section
= DBX_TEXT_SECTION (objfile
);
451 section
= SECT_OFF_DATA (objfile
);
452 bfd_section
= DBX_DATA_SECTION (objfile
);
456 section
= SECT_OFF_BSS (objfile
);
457 bfd_section
= DBX_BSS_SECTION (objfile
);
467 section
= SECT_OFF_DATA (objfile
);
468 bfd_section
= DBX_DATA_SECTION (objfile
);
471 /* I don't think this type actually exists; since a N_SETV is the result
472 of going over many .o files, it doesn't make sense to have one
474 ms_type
= mst_file_data
;
475 section
= SECT_OFF_DATA (objfile
);
476 bfd_section
= DBX_DATA_SECTION (objfile
);
483 ms_type
= mst_file_text
;
484 section
= SECT_OFF_TEXT (objfile
);
485 bfd_section
= DBX_TEXT_SECTION (objfile
);
488 ms_type
= mst_file_data
;
490 /* Check for __DYNAMIC, which is used by Sun shared libraries.
491 Record it as global even if it's local, not global, so
492 lookup_minimal_symbol can find it. We don't check symbol_leading_char
493 because for SunOS4 it always is '_'. */
494 if (name
[8] == 'C' && STREQ ("__DYNAMIC", name
))
497 /* Same with virtual function tables, both global and static. */
499 char *tempstring
= name
;
500 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
502 if (is_vtable_name (tempstring
))
505 section
= SECT_OFF_DATA (objfile
);
506 bfd_section
= DBX_DATA_SECTION (objfile
);
509 ms_type
= mst_file_bss
;
510 section
= SECT_OFF_BSS (objfile
);
511 bfd_section
= DBX_BSS_SECTION (objfile
);
514 ms_type
= mst_unknown
;
520 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
521 && address
< lowest_text_address
)
522 lowest_text_address
= address
;
524 prim_record_minimal_symbol_and_info
525 (name
, address
, ms_type
, NULL
, section
, bfd_section
, objfile
);
528 /* Scan and build partial symbols for a symbol file.
529 We have been initialized by a call to dbx_symfile_init, which
530 put all the relevant info into a "struct dbx_symfile_info",
531 hung off the objfile structure.
533 MAINLINE is true if we are reading the main symbol
534 table (as opposed to a shared lib or dynamically loaded file). */
537 dbx_symfile_read (struct objfile
*objfile
, int mainline
)
541 struct cleanup
*back_to
;
543 sym_bfd
= objfile
->obfd
;
545 /* .o and .nlm files are relocatables with text, data and bss segs based at
546 0. This flag disables special (Solaris stabs-in-elf only) fixups for
547 symbols with a value of 0. */
549 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
551 /* This is true for Solaris (and all other systems which put stabs
552 in sections, hopefully, since it would be silly to do things
553 differently from Solaris), and false for SunOS4 and other a.out
555 block_address_function_relative
=
556 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
557 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
558 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
559 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
560 || (0 == strncmp (bfd_get_target (sym_bfd
), "epoc-pe", 7))
561 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
563 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
565 perror_with_name (objfile
->name
);
567 /* If we are reinitializing, or if we have never loaded syms yet, init */
569 || (objfile
->global_psymbols
.size
== 0
570 && objfile
->static_psymbols
.size
== 0))
571 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
573 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
574 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
576 free_pending_blocks ();
577 back_to
= make_cleanup (really_free_pendings
, 0);
579 init_minimal_symbol_collection ();
580 make_cleanup_discard_minimal_symbols ();
582 /* Read stabs data from executable file and define symbols. */
584 read_dbx_symtab (objfile
);
586 /* Add the dynamic symbols. */
588 read_dbx_dynamic_symtab (objfile
);
590 /* Install any minimal symbols that have been collected as the current
591 minimal symbols for this objfile. */
593 install_minimal_symbols (objfile
);
595 do_cleanups (back_to
);
598 /* Initialize anything that needs initializing when a completely new
599 symbol file is specified (not just adding some symbols from another
600 file, e.g. a shared library). */
603 dbx_new_init (struct objfile
*ignore
)
605 stabsread_new_init ();
606 buildsym_new_init ();
607 init_header_files ();
611 /* dbx_symfile_init ()
612 is the dbx-specific initialization routine for reading symbols.
613 It is passed a struct objfile which contains, among other things,
614 the BFD for the file whose symbols are being read, and a slot for a pointer
615 to "private data" which we fill with goodies.
617 We read the string table into malloc'd space and stash a pointer to it.
619 Since BFD doesn't know how to read debug symbols in a format-independent
620 way (and may never do so...), we have to do it ourselves. We will never
621 be called unless this is an a.out (or very similar) file.
622 FIXME, there should be a cleaner peephole into the BFD environment here. */
624 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
627 dbx_symfile_init (struct objfile
*objfile
)
630 bfd
*sym_bfd
= objfile
->obfd
;
631 char *name
= bfd_get_filename (sym_bfd
);
633 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
635 /* Allocate struct to keep track of the symfile */
636 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
637 xmmalloc (objfile
->md
, sizeof (struct dbx_symfile_info
));
638 memset (objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
640 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
641 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
642 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
644 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
645 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
646 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
648 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
650 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
652 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
654 error ("Can't find .text section in symbol file");
655 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
656 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
658 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
659 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
660 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
662 /* Read the string table and stash it away in the psymbol_obstack. It is
663 only needed as long as we need to expand psymbols into full symbols,
664 so when we blow away the psymbol the string table goes away as well.
665 Note that gdb used to use the results of attempting to malloc the
666 string table, based on the size it read, as a form of sanity check
667 for botched byte swapping, on the theory that a byte swapped string
668 table size would be so totally bogus that the malloc would fail. Now
669 that we put in on the psymbol_obstack, we can't do this since gdb gets
670 a fatal error (out of virtual memory) if the size is bogus. We can
671 however at least check to see if the size is less than the size of
672 the size field itself, or larger than the size of the entire file.
673 Note that all valid string tables have a size greater than zero, since
674 the bytes used to hold the size are included in the count. */
676 if (STRING_TABLE_OFFSET
== 0)
678 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
679 will never be zero, even when there is no string table. This
680 would appear to be a bug in bfd. */
681 DBX_STRINGTAB_SIZE (objfile
) = 0;
682 DBX_STRINGTAB (objfile
) = NULL
;
686 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
688 perror_with_name (name
);
690 memset (size_temp
, 0, sizeof (size_temp
));
691 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
694 perror_with_name (name
);
698 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
699 EOF if there is no string table, and attempting to read the size
700 from EOF will read zero bytes. */
701 DBX_STRINGTAB_SIZE (objfile
) = 0;
702 DBX_STRINGTAB (objfile
) = NULL
;
706 /* Read some data that would appear to be the string table size.
707 If there really is a string table, then it is probably the right
708 size. Byteswap if necessary and validate the size. Note that
709 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
710 random data that happened to be at STRING_TABLE_OFFSET, because
711 bfd can't tell us there is no string table, the sanity checks may
712 or may not catch this. */
713 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
715 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
716 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
717 error ("ridiculous string table size (%d bytes).",
718 DBX_STRINGTAB_SIZE (objfile
));
720 DBX_STRINGTAB (objfile
) =
721 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
722 DBX_STRINGTAB_SIZE (objfile
));
723 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
725 /* Now read in the string table in one big gulp. */
727 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
729 perror_with_name (name
);
730 val
= bfd_bread (DBX_STRINGTAB (objfile
),
731 DBX_STRINGTAB_SIZE (objfile
),
733 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
734 perror_with_name (name
);
739 /* Perform any local cleanups required when we are done with a particular
740 objfile. I.E, we are in the process of discarding all symbol information
741 for an objfile, freeing up all memory held for it, and unlinking the
742 objfile struct from the global list of known objfiles. */
745 dbx_symfile_finish (struct objfile
*objfile
)
747 if (objfile
->sym_stab_info
!= NULL
)
749 if (HEADER_FILES (objfile
) != NULL
)
751 int i
= N_HEADER_FILES (objfile
);
752 struct header_file
*hfiles
= HEADER_FILES (objfile
);
756 xfree (hfiles
[i
].name
);
757 xfree (hfiles
[i
].vector
);
761 xmfree (objfile
->md
, objfile
->sym_stab_info
);
763 free_header_files ();
767 /* Buffer for reading the symbol table entries. */
768 static struct external_nlist symbuf
[4096];
769 static int symbuf_idx
;
770 static int symbuf_end
;
772 /* Name of last function encountered. Used in Solaris to approximate
773 object file boundaries. */
774 static char *last_function_name
;
776 /* The address in memory of the string table of the object file we are
777 reading (which might not be the "main" object file, but might be a
778 shared library or some other dynamically loaded thing). This is
779 set by read_dbx_symtab when building psymtabs, and by
780 read_ofile_symtab when building symtabs, and is used only by
781 next_symbol_text. FIXME: If that is true, we don't need it when
782 building psymtabs, right? */
783 static char *stringtab_global
;
785 /* These variables are used to control fill_symbuf when the stabs
786 symbols are not contiguous (as may be the case when a COFF file is
787 linked using --split-by-reloc). */
788 static struct stab_section_list
*symbuf_sections
;
789 static unsigned int symbuf_left
;
790 static unsigned int symbuf_read
;
792 /* This variable stores a global stabs buffer, if we read stabs into
793 memory in one chunk in order to process relocations. */
794 static bfd_byte
*stabs_data
;
796 /* Refill the symbol table input buffer
797 and set the variables that control fetching entries from it.
798 Reports an error if no data available.
799 This function can read past the end of the symbol table
800 (into the string table) but this does no harm. */
803 fill_symbuf (bfd
*sym_bfd
)
810 nbytes
= sizeof (symbuf
);
811 if (nbytes
> symbuf_left
)
812 nbytes
= symbuf_left
;
813 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
815 else if (symbuf_sections
== NULL
)
817 count
= sizeof (symbuf
);
818 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
822 if (symbuf_left
<= 0)
824 file_ptr filepos
= symbuf_sections
->section
->filepos
;
825 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
826 perror_with_name (bfd_get_filename (sym_bfd
));
827 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
828 symbol_table_offset
= filepos
- symbuf_read
;
829 symbuf_sections
= symbuf_sections
->next
;
833 if (count
> sizeof (symbuf
))
834 count
= sizeof (symbuf
);
835 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
839 perror_with_name (bfd_get_filename (sym_bfd
));
840 else if (nbytes
== 0)
841 error ("Premature end of file reading symbol table");
842 symbuf_end
= nbytes
/ symbol_size
;
844 symbuf_left
-= nbytes
;
845 symbuf_read
+= nbytes
;
849 stabs_seek (int sym_offset
)
853 symbuf_read
+= sym_offset
;
854 symbuf_left
-= sym_offset
;
857 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
860 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
862 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
863 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
864 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
865 if (bfd_get_sign_extend_vma (abfd)) \
866 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
868 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
871 /* Invariant: The symbol pointed to by symbuf_idx is the first one
872 that hasn't been swapped. Swap the symbol at the same time
873 that symbuf_idx is incremented. */
875 /* dbx allows the text of a symbol name to be continued into the
876 next symbol name! When such a continuation is encountered
877 (a \ at the end of the text of a name)
878 call this function to get the continuation. */
881 dbx_next_symbol_text (struct objfile
*objfile
)
883 struct internal_nlist nlist
;
885 if (symbuf_idx
== symbuf_end
)
886 fill_symbuf (symfile_bfd
);
889 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
890 OBJSTAT (objfile
, n_stabs
++);
894 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
897 /* Initialize the list of bincls to contain none and have some
901 init_bincl_list (int number
, struct objfile
*objfile
)
903 bincls_allocated
= number
;
904 next_bincl
= bincl_list
= (struct header_file_location
*)
905 xmmalloc (objfile
->md
, bincls_allocated
* sizeof (struct header_file_location
));
908 /* Add a bincl to the list. */
911 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
913 if (next_bincl
>= bincl_list
+ bincls_allocated
)
915 int offset
= next_bincl
- bincl_list
;
916 bincls_allocated
*= 2;
917 bincl_list
= (struct header_file_location
*)
918 xmrealloc (pst
->objfile
->md
, (char *) bincl_list
,
919 bincls_allocated
* sizeof (struct header_file_location
));
920 next_bincl
= bincl_list
+ offset
;
922 next_bincl
->pst
= pst
;
923 next_bincl
->instance
= instance
;
924 next_bincl
++->name
= name
;
927 /* Given a name, value pair, find the corresponding
928 bincl in the list. Return the partial symtab associated
929 with that header_file_location. */
931 static struct partial_symtab
*
932 find_corresponding_bincl_psymtab (char *name
, int instance
)
934 struct header_file_location
*bincl
;
936 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
937 if (bincl
->instance
== instance
938 && STREQ (name
, bincl
->name
))
941 repeated_header_complaint (name
, symnum
);
942 return (struct partial_symtab
*) 0;
945 /* Free the storage allocated for the bincl list. */
948 free_bincl_list (struct objfile
*objfile
)
950 xmfree (objfile
->md
, bincl_list
);
951 bincls_allocated
= 0;
955 do_free_bincl_list_cleanup (void *objfile
)
957 free_bincl_list (objfile
);
960 static struct cleanup
*
961 make_cleanup_free_bincl_list (struct objfile
*objfile
)
963 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
966 /* Set namestring based on nlist. If the string table index is invalid,
967 give a fake name, and print a single error message per symbol file read,
968 rather than abort the symbol reading or flood the user with messages. */
971 set_namestring (struct objfile
*objfile
, struct internal_nlist nlist
)
975 if (((unsigned) nlist
.n_strx
+ file_string_table_offset
) >=
976 DBX_STRINGTAB_SIZE (objfile
))
978 complaint (&symfile_complaints
, "bad string table offset in symbol %d",
980 namestring
= "<bad string table offset>";
983 namestring
= nlist
.n_strx
+ file_string_table_offset
+
984 DBX_STRINGTAB (objfile
);
988 /* Scan a SunOs dynamic symbol table for symbols of interest and
989 add them to the minimal symbol table. */
992 read_dbx_dynamic_symtab (struct objfile
*objfile
)
994 bfd
*abfd
= objfile
->obfd
;
995 struct cleanup
*back_to
;
1005 CORE_ADDR sym_value
;
1008 /* Check that the symbol file has dynamic symbols that we know about.
1009 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1010 on a sun4 host (and vice versa) and bfd is not configured
1011 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1012 so we ignore the dynamic symbols in this case. */
1013 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1014 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1015 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1018 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1019 if (dynsym_size
< 0)
1022 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1023 back_to
= make_cleanup (xfree
, dynsyms
);
1025 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1026 if (dynsym_count
< 0)
1028 do_cleanups (back_to
);
1032 /* Enter dynamic symbols into the minimal symbol table
1033 if this is a stripped executable. */
1034 if (bfd_get_symcount (abfd
) <= 0)
1037 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1039 asymbol
*sym
= *symptr
;
1043 sec
= bfd_get_section (sym
);
1045 /* BFD symbols are section relative. */
1046 sym_value
= sym
->value
+ sec
->vma
;
1048 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1050 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1053 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1055 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1058 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1060 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS (objfile
));
1066 if (sym
->flags
& BSF_GLOBAL
)
1069 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1074 /* Symbols from shared libraries have a dynamic relocation entry
1075 that points to the associated slot in the procedure linkage table.
1076 We make a mininal symbol table entry with type mst_solib_trampoline
1077 at the address in the procedure linkage table. */
1078 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1079 if (dynrel_size
< 0)
1081 do_cleanups (back_to
);
1085 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1086 make_cleanup (xfree
, dynrels
);
1088 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1089 if (dynrel_count
< 0)
1091 do_cleanups (back_to
);
1095 for (counter
= 0, relptr
= dynrels
;
1096 counter
< dynrel_count
;
1097 counter
++, relptr
++)
1099 arelent
*rel
= *relptr
;
1101 rel
->address
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1103 switch (bfd_get_arch (abfd
))
1105 case bfd_arch_sparc
:
1106 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1110 /* `16' is the type BFD produces for a jump table relocation. */
1111 if (rel
->howto
->type
!= 16)
1114 /* Adjust address in the jump table to point to
1115 the start of the bsr instruction. */
1122 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1123 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1127 do_cleanups (back_to
);
1130 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1132 find_stab_function_addr (char *namestring
, char *filename
,
1133 struct objfile
*objfile
)
1135 struct minimal_symbol
*msym
;
1139 p
= strchr (namestring
, ':');
1144 strncpy (p
, namestring
, n
);
1147 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1150 /* Sun Fortran appends an underscore to the minimal symbol name,
1151 try again with an appended underscore if the minimal symbol
1155 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1158 if (msym
== NULL
&& filename
!= NULL
)
1160 /* Try again without the filename. */
1162 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1164 if (msym
== NULL
&& filename
!= NULL
)
1166 /* And try again for Sun Fortran, but without the filename. */
1169 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1172 return msym
== NULL
? 0 : SYMBOL_VALUE_ADDRESS (msym
);
1174 #endif /* SOFUN_ADDRESS_MAYBE_MISSING */
1177 function_outside_compilation_unit_complaint (const char *arg1
)
1179 complaint (&symfile_complaints
,
1180 "function `%s' appears to be defined outside of all compilation units",
1184 /* Setup partial_symtab's describing each source file for which
1185 debugging information is available. */
1188 read_dbx_symtab (struct objfile
*objfile
)
1190 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1191 struct internal_nlist nlist
;
1192 CORE_ADDR text_addr
;
1197 int past_first_source_file
= 0;
1198 CORE_ADDR last_o_file_start
= 0;
1199 CORE_ADDR last_function_start
= 0;
1200 struct cleanup
*back_to
;
1202 int textlow_not_set
;
1203 int data_sect_index
;
1205 /* Current partial symtab */
1206 struct partial_symtab
*pst
;
1208 /* List of current psymtab's include files */
1209 char **psymtab_include_list
;
1210 int includes_allocated
;
1213 /* Index within current psymtab dependency list */
1214 struct partial_symtab
**dependency_list
;
1215 int dependencies_used
, dependencies_allocated
;
1217 text_addr
= DBX_TEXT_ADDR (objfile
);
1218 text_size
= DBX_TEXT_SIZE (objfile
);
1220 /* FIXME. We probably want to change stringtab_global rather than add this
1221 while processing every symbol entry. FIXME. */
1222 file_string_table_offset
= 0;
1223 next_file_string_table_offset
= 0;
1225 stringtab_global
= DBX_STRINGTAB (objfile
);
1227 pst
= (struct partial_symtab
*) 0;
1229 includes_allocated
= 30;
1231 psymtab_include_list
= (char **) alloca (includes_allocated
*
1234 dependencies_allocated
= 30;
1235 dependencies_used
= 0;
1237 (struct partial_symtab
**) alloca (dependencies_allocated
*
1238 sizeof (struct partial_symtab
*));
1240 /* Init bincl list */
1241 init_bincl_list (20, objfile
);
1242 back_to
= make_cleanup_free_bincl_list (objfile
);
1244 last_source_file
= NULL
;
1246 lowest_text_address
= (CORE_ADDR
) -1;
1248 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1249 abfd
= objfile
->obfd
;
1250 symbuf_end
= symbuf_idx
= 0;
1251 next_symbol_text_func
= dbx_next_symbol_text
;
1252 textlow_not_set
= 1;
1253 has_line_numbers
= 0;
1255 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1256 to global and static variables. The stab for a global or static
1257 variable doesn't give us any indication of which section it's in,
1258 so we can't tell immediately which offset in
1259 objfile->section_offsets we should apply to the variable's
1262 We could certainly find out which section contains the variable
1263 by looking up the variable's unrelocated address with
1264 find_pc_section, but that would be expensive; this is the
1265 function that constructs the partial symbol tables by examining
1266 every symbol in the entire executable, and it's
1267 performance-critical. So that expense would not be welcome. I'm
1268 not sure what to do about this at the moment.
1270 What we have done for years is to simply assume that the .data
1271 section's offset is appropriate for all global and static
1272 variables. Recently, this was expanded to fall back to the .bss
1273 section's offset if there is no .data section, and then to the
1274 .rodata section's offset. */
1275 data_sect_index
= objfile
->sect_index_data
;
1276 if (data_sect_index
== -1)
1277 data_sect_index
= SECT_OFF_BSS (objfile
);
1278 if (data_sect_index
== -1)
1279 data_sect_index
= SECT_OFF_RODATA (objfile
);
1281 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1282 for the file to have no .data, no .bss, and no .text at all, if
1283 it also has no global or static variables. If it does, we will
1284 get an internal error from an ANOFFSET macro below when we try to
1285 use data_sect_index. */
1287 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1289 /* Get the symbol for this run and pull out some info */
1290 QUIT
; /* allow this to be interruptable */
1291 if (symbuf_idx
== symbuf_end
)
1293 bufp
= &symbuf
[symbuf_idx
++];
1296 * Special case to speed up readin.
1298 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1300 has_line_numbers
= 1;
1304 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1305 OBJSTAT (objfile
, n_stabs
++);
1307 /* Ok. There is a lot of code duplicated in the rest of this
1308 switch statement (for efficiency reasons). Since I don't
1309 like duplicating code, I will do my penance here, and
1310 describe the code which is duplicated:
1312 *) The assignment to namestring.
1313 *) The call to strchr.
1314 *) The addition of a partial symbol the the two partial
1315 symbol lists. This last is a large section of code, so
1316 I've imbedded it in the following macro.
1319 switch (nlist
.n_type
)
1323 * Standard, external, non-debugger, symbols
1326 case N_TEXT
| N_EXT
:
1327 case N_NBTEXT
| N_EXT
:
1328 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1331 case N_DATA
| N_EXT
:
1332 case N_NBDATA
| N_EXT
:
1333 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1338 case N_NBBSS
| N_EXT
:
1339 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1340 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS (objfile
));
1345 namestring
= set_namestring (objfile
, nlist
);
1348 record_minimal_symbol (namestring
, nlist
.n_value
,
1349 nlist
.n_type
, objfile
); /* Always */
1352 /* Standard, local, non-debugger, symbols */
1356 /* We need to be able to deal with both N_FN or N_TEXT,
1357 because we have no way of knowing whether the sys-supplied ld
1358 or GNU ld was used to make the executable. Sequents throw
1359 in another wrinkle -- they renumbered N_FN. */
1364 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1365 namestring
= set_namestring (objfile
, nlist
);
1367 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1368 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1369 && namestring
[nsl
- 2] == '.'))
1371 if (objfile
->ei
.entry_point
< nlist
.n_value
&&
1372 objfile
->ei
.entry_point
>= last_o_file_start
)
1374 objfile
->ei
.deprecated_entry_file_lowpc
= last_o_file_start
;
1375 objfile
->ei
.deprecated_entry_file_highpc
= nlist
.n_value
;
1377 if (past_first_source_file
&& pst
1378 /* The gould NP1 uses low values for .o and -l symbols
1379 which are not the address. */
1380 && nlist
.n_value
>= pst
->textlow
)
1382 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1383 symnum
* symbol_size
,
1384 nlist
.n_value
> pst
->texthigh
1385 ? nlist
.n_value
: pst
->texthigh
,
1386 dependency_list
, dependencies_used
, textlow_not_set
);
1387 pst
= (struct partial_symtab
*) 0;
1389 dependencies_used
= 0;
1392 past_first_source_file
= 1;
1393 last_o_file_start
= nlist
.n_value
;
1400 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1403 case N_UNDF
| N_EXT
:
1404 if (nlist
.n_value
!= 0)
1406 /* This is a "Fortran COMMON" symbol. See if the target
1407 environment knows where it has been relocated to. */
1411 namestring
= set_namestring (objfile
, nlist
);
1412 if (target_lookup_symbol (namestring
, &reladdr
))
1414 continue; /* Error in lookup; ignore symbol for now. */
1416 nlist
.n_type
^= (N_BSS
^ N_UNDF
); /* Define it as a bss-symbol */
1417 nlist
.n_value
= reladdr
;
1418 goto bss_ext_symbol
;
1420 continue; /* Just undefined, not COMMON */
1423 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1425 /* Deal with relative offsets in the string table
1426 used in ELF+STAB under Solaris. If we want to use the
1427 n_strx field, which contains the name of the file,
1428 we must adjust file_string_table_offset *before* calling
1429 set_namestring(). */
1430 past_first_source_file
= 1;
1431 file_string_table_offset
= next_file_string_table_offset
;
1432 next_file_string_table_offset
=
1433 file_string_table_offset
+ nlist
.n_value
;
1434 if (next_file_string_table_offset
< file_string_table_offset
)
1435 error ("string table offset backs up at %d", symnum
);
1436 /* FIXME -- replace error() with complaint. */
1441 /* Lots of symbol types we can just ignore. */
1448 /* Keep going . . . */
1451 * Special symbol types for GNU
1454 case N_INDR
| N_EXT
:
1456 case N_SETA
| N_EXT
:
1458 case N_SETT
| N_EXT
:
1460 case N_SETD
| N_EXT
:
1462 case N_SETB
| N_EXT
:
1473 static int prev_so_symnum
= -10;
1474 static int first_so_symnum
;
1476 int prev_textlow_not_set
;
1478 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1480 prev_textlow_not_set
= textlow_not_set
;
1482 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1483 /* A zero value is probably an indication for the SunPRO 3.0
1484 compiler. end_psymtab explicitly tests for zero, so
1485 don't relocate it. */
1487 if (nlist
.n_value
== 0)
1489 textlow_not_set
= 1;
1493 textlow_not_set
= 0;
1495 textlow_not_set
= 0;
1497 past_first_source_file
= 1;
1499 if (prev_so_symnum
!= symnum
- 1)
1500 { /* Here if prev stab wasn't N_SO */
1501 first_so_symnum
= symnum
;
1505 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1506 symnum
* symbol_size
,
1507 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1508 dependency_list
, dependencies_used
,
1509 prev_textlow_not_set
);
1510 pst
= (struct partial_symtab
*) 0;
1512 dependencies_used
= 0;
1516 prev_so_symnum
= symnum
;
1518 /* End the current partial symtab and start a new one */
1520 namestring
= set_namestring (objfile
, nlist
);
1522 /* Null name means end of .o file. Don't start a new one. */
1523 if (*namestring
== '\000')
1526 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1527 The first one is a directory name; the second the file name.
1528 If pst exists, is empty, and has a filename ending in '/',
1529 we assume the previous N_SO was a directory name. */
1531 p
= strrchr (namestring
, '/');
1532 if (p
&& *(p
+ 1) == '\000')
1533 continue; /* Simply ignore directory name SOs */
1535 /* Some other compilers (C++ ones in particular) emit useless
1536 SOs for non-existant .c files. We ignore all subsequent SOs that
1537 immediately follow the first. */
1540 pst
= start_psymtab (objfile
,
1542 first_so_symnum
* symbol_size
,
1543 objfile
->global_psymbols
.next
,
1544 objfile
->static_psymbols
.next
);
1550 enum language tmp_language
;
1551 /* Add this bincl to the bincl_list for future EXCLs. No
1552 need to save the string; it'll be around until
1553 read_dbx_symtab function returns */
1555 namestring
= set_namestring (objfile
, nlist
);
1556 tmp_language
= deduce_language_from_filename (namestring
);
1558 /* Only change the psymtab's language if we've learned
1559 something useful (eg. tmp_language is not language_unknown).
1560 In addition, to match what start_subfile does, never change
1562 if (tmp_language
!= language_unknown
1563 && (tmp_language
!= language_c
1564 || psymtab_language
!= language_cplus
))
1565 psymtab_language
= tmp_language
;
1569 /* FIXME: we should not get here without a PST to work on.
1570 Attempt to recover. */
1571 complaint (&symfile_complaints
,
1572 "N_BINCL %s not in entries for any file, at symtab pos %d",
1573 namestring
, symnum
);
1576 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1578 /* Mark down an include file in the current psymtab */
1580 goto record_include_file
;
1585 enum language tmp_language
;
1586 /* Mark down an include file in the current psymtab */
1588 namestring
= set_namestring (objfile
, nlist
);
1589 tmp_language
= deduce_language_from_filename (namestring
);
1591 /* Only change the psymtab's language if we've learned
1592 something useful (eg. tmp_language is not language_unknown).
1593 In addition, to match what start_subfile does, never change
1595 if (tmp_language
!= language_unknown
1596 && (tmp_language
!= language_c
1597 || psymtab_language
!= language_cplus
))
1598 psymtab_language
= tmp_language
;
1600 /* In C++, one may expect the same filename to come round many
1601 times, when code is coming alternately from the main file
1602 and from inline functions in other files. So I check to see
1603 if this is a file we've seen before -- either the main
1604 source file, or a previously included file.
1606 This seems to be a lot of time to be spending on N_SOL, but
1607 things like "break c-exp.y:435" need to work (I
1608 suppose the psymtab_include_list could be hashed or put
1609 in a binary tree, if profiling shows this is a major hog). */
1610 if (pst
&& STREQ (namestring
, pst
->filename
))
1614 for (i
= 0; i
< includes_used
; i
++)
1615 if (STREQ (namestring
, psymtab_include_list
[i
]))
1624 record_include_file
:
1626 psymtab_include_list
[includes_used
++] = namestring
;
1627 if (includes_used
>= includes_allocated
)
1629 char **orig
= psymtab_include_list
;
1631 psymtab_include_list
= (char **)
1632 alloca ((includes_allocated
*= 2) *
1634 memcpy (psymtab_include_list
, orig
,
1635 includes_used
* sizeof (char *));
1639 case N_LSYM
: /* Typedef or automatic variable. */
1640 case N_STSYM
: /* Data seg var -- static */
1641 case N_LCSYM
: /* BSS " */
1642 case N_ROSYM
: /* Read-only data seg var -- static. */
1643 case N_NBSTS
: /* Gould nobase. */
1644 case N_NBLCS
: /* symbols. */
1646 case N_GSYM
: /* Global (extern) variable; can be
1647 data or bss (sigh FIXME). */
1649 /* Following may probably be ignored; I'll leave them here
1650 for now (until I do Pascal and Modula 2 extensions). */
1652 case N_PC
: /* I may or may not need this; I
1654 case N_M2C
: /* I suspect that I can ignore this here. */
1655 case N_SCOPE
: /* Same. */
1657 namestring
= set_namestring (objfile
, nlist
);
1659 /* See if this is an end of function stab. */
1660 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1664 /* It's value is the size (in bytes) of the function for
1665 function relative stabs, or the address of the function's
1666 end for old style stabs. */
1667 valu
= nlist
.n_value
+ last_function_start
;
1668 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1669 pst
->texthigh
= valu
;
1673 p
= (char *) strchr (namestring
, ':');
1675 continue; /* Not a debugging symbol. */
1679 /* Main processing section for debugging symbols which
1680 the initial read through the symbol tables needs to worry
1681 about. If we reach this point, the symbol which we are
1682 considering is definitely one we are interested in.
1683 p must also contain the (valid) index into the namestring
1684 which indicates the debugging type symbol. */
1689 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, data_sect_index
);
1690 #ifdef STATIC_TRANSFORM_NAME
1691 namestring
= STATIC_TRANSFORM_NAME (namestring
);
1693 add_psymbol_to_list (namestring
, p
- namestring
,
1694 VAR_DOMAIN
, LOC_STATIC
,
1695 &objfile
->static_psymbols
,
1697 psymtab_language
, objfile
);
1700 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, data_sect_index
);
1701 /* The addresses in these entries are reported to be
1702 wrong. See the code that reads 'G's for symtabs. */
1703 add_psymbol_to_list (namestring
, p
- namestring
,
1704 VAR_DOMAIN
, LOC_STATIC
,
1705 &objfile
->global_psymbols
,
1707 psymtab_language
, objfile
);
1711 /* When a 'T' entry is defining an anonymous enum, it
1712 may have a name which is the empty string, or a
1713 single space. Since they're not really defining a
1714 symbol, those shouldn't go in the partial symbol
1715 table. We do pick up the elements of such enums at
1716 'check_enum:', below. */
1717 if (p
>= namestring
+ 2
1718 || (p
== namestring
+ 1
1719 && namestring
[0] != ' '))
1721 add_psymbol_to_list (namestring
, p
- namestring
,
1722 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1723 &objfile
->static_psymbols
,
1725 psymtab_language
, objfile
);
1728 /* Also a typedef with the same name. */
1729 add_psymbol_to_list (namestring
, p
- namestring
,
1730 VAR_DOMAIN
, LOC_TYPEDEF
,
1731 &objfile
->static_psymbols
,
1733 psymtab_language
, objfile
);
1739 if (p
!= namestring
) /* a name is there, not just :T... */
1741 add_psymbol_to_list (namestring
, p
- namestring
,
1742 VAR_DOMAIN
, LOC_TYPEDEF
,
1743 &objfile
->static_psymbols
,
1745 psymtab_language
, objfile
);
1748 /* If this is an enumerated type, we need to
1749 add all the enum constants to the partial symbol
1750 table. This does not cover enums without names, e.g.
1751 "enum {a, b} c;" in C, but fortunately those are
1752 rare. There is no way for GDB to find those from the
1753 enum type without spending too much time on it. Thus
1754 to solve this problem, the compiler needs to put out the
1755 enum in a nameless type. GCC2 does this. */
1757 /* We are looking for something of the form
1758 <name> ":" ("t" | "T") [<number> "="] "e"
1759 {<constant> ":" <value> ","} ";". */
1761 /* Skip over the colon and the 't' or 'T'. */
1763 /* This type may be given a number. Also, numbers can come
1764 in pairs like (0,26). Skip over it. */
1765 while ((*p
>= '0' && *p
<= '9')
1766 || *p
== '(' || *p
== ',' || *p
== ')'
1772 /* The aix4 compiler emits extra crud before the members. */
1775 /* Skip over the type (?). */
1779 /* Skip over the colon. */
1783 /* We have found an enumerated type. */
1784 /* According to comments in read_enum_type
1785 a comma could end it instead of a semicolon.
1786 I don't know where that happens.
1788 while (*p
&& *p
!= ';' && *p
!= ',')
1792 /* Check for and handle cretinous dbx symbol name
1794 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1795 p
= next_symbol_text (objfile
);
1797 /* Point to the character after the name
1798 of the enum constant. */
1799 for (q
= p
; *q
&& *q
!= ':'; q
++)
1801 /* Note that the value doesn't matter for
1802 enum constants in psymtabs, just in symtabs. */
1803 add_psymbol_to_list (p
, q
- p
,
1804 VAR_DOMAIN
, LOC_CONST
,
1805 &objfile
->static_psymbols
, 0,
1806 0, psymtab_language
, objfile
);
1807 /* Point past the name. */
1809 /* Skip over the value. */
1810 while (*p
&& *p
!= ',')
1812 /* Advance past the comma. */
1819 /* Constant, e.g. from "const" in Pascal. */
1820 add_psymbol_to_list (namestring
, p
- namestring
,
1821 VAR_DOMAIN
, LOC_CONST
,
1822 &objfile
->static_psymbols
, nlist
.n_value
,
1823 0, psymtab_language
, objfile
);
1829 int name_len
= p
- namestring
;
1830 char *name
= xmalloc (name_len
+ 1);
1831 memcpy (name
, namestring
, name_len
);
1832 name
[name_len
] = '\0';
1833 function_outside_compilation_unit_complaint (name
);
1836 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1837 /* Kludges for ELF/STABS with Sun ACC */
1838 last_function_name
= namestring
;
1839 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1840 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1841 value for the bottom of the text seg in those cases. */
1842 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1843 SECT_OFF_TEXT (objfile
)))
1845 CORE_ADDR minsym_valu
=
1846 find_stab_function_addr (namestring
, pst
->filename
, objfile
);
1847 /* find_stab_function_addr will return 0 if the minimal
1848 symbol wasn't found. (Unfortunately, this might also
1849 be a valid address.) Anyway, if it *does* return 0,
1850 it is likely that the value was set correctly to begin
1852 if (minsym_valu
!= 0)
1853 nlist
.n_value
= minsym_valu
;
1855 if (pst
&& textlow_not_set
)
1857 pst
->textlow
= nlist
.n_value
;
1858 textlow_not_set
= 0;
1863 /* Keep track of the start of the last function so we
1864 can handle end of function symbols. */
1865 last_function_start
= nlist
.n_value
;
1867 /* In reordered executables this function may lie outside
1868 the bounds created by N_SO symbols. If that's the case
1869 use the address of this function as the low bound for
1870 the partial symbol table. */
1873 || (nlist
.n_value
< pst
->textlow
1875 != ANOFFSET (objfile
->section_offsets
,
1876 SECT_OFF_TEXT (objfile
))))))
1878 pst
->textlow
= nlist
.n_value
;
1879 textlow_not_set
= 0;
1881 add_psymbol_to_list (namestring
, p
- namestring
,
1882 VAR_DOMAIN
, LOC_BLOCK
,
1883 &objfile
->static_psymbols
,
1885 psymtab_language
, objfile
);
1888 /* Global functions were ignored here, but now they
1889 are put into the global psymtab like one would expect.
1890 They're also in the minimal symbol table. */
1894 int name_len
= p
- namestring
;
1895 char *name
= xmalloc (name_len
+ 1);
1896 memcpy (name
, namestring
, name_len
);
1897 name
[name_len
] = '\0';
1898 function_outside_compilation_unit_complaint (name
);
1901 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1902 /* Kludges for ELF/STABS with Sun ACC */
1903 last_function_name
= namestring
;
1904 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1905 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1906 value for the bottom of the text seg in those cases. */
1907 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1908 SECT_OFF_TEXT (objfile
)))
1910 CORE_ADDR minsym_valu
=
1911 find_stab_function_addr (namestring
, pst
->filename
, objfile
);
1912 /* find_stab_function_addr will return 0 if the minimal
1913 symbol wasn't found. (Unfortunately, this might also
1914 be a valid address.) Anyway, if it *does* return 0,
1915 it is likely that the value was set correctly to begin
1917 if (minsym_valu
!= 0)
1918 nlist
.n_value
= minsym_valu
;
1920 if (pst
&& textlow_not_set
)
1922 pst
->textlow
= nlist
.n_value
;
1923 textlow_not_set
= 0;
1928 /* Keep track of the start of the last function so we
1929 can handle end of function symbols. */
1930 last_function_start
= nlist
.n_value
;
1932 /* In reordered executables this function may lie outside
1933 the bounds created by N_SO symbols. If that's the case
1934 use the address of this function as the low bound for
1935 the partial symbol table. */
1938 || (nlist
.n_value
< pst
->textlow
1940 != ANOFFSET (objfile
->section_offsets
,
1941 SECT_OFF_TEXT (objfile
))))))
1943 pst
->textlow
= nlist
.n_value
;
1944 textlow_not_set
= 0;
1946 add_psymbol_to_list (namestring
, p
- namestring
,
1947 VAR_DOMAIN
, LOC_BLOCK
,
1948 &objfile
->global_psymbols
,
1950 psymtab_language
, objfile
);
1953 /* Two things show up here (hopefully); static symbols of
1954 local scope (static used inside braces) or extensions
1955 of structure symbols. We can ignore both. */
1969 case '#': /* for symbol identification (used in live ranges) */
1973 /* It is a C++ nested symbol. We don't need to record it
1974 (I don't think); if we try to look up foo::bar::baz,
1975 then symbols for the symtab containing foo should get
1976 read in, I think. */
1977 /* Someone says sun cc puts out symbols like
1978 /foo/baz/maclib::/usr/local/bin/maclib,
1979 which would get here with a symbol type of ':'. */
1983 /* Unexpected symbol descriptor. The second and subsequent stabs
1984 of a continued stab can show up here. The question is
1985 whether they ever can mimic a normal stab--it would be
1986 nice if not, since we certainly don't want to spend the
1987 time searching to the end of every string looking for
1990 complaint (&symfile_complaints
, "unknown symbol descriptor `%c'",
1993 /* Ignore it; perhaps it is an extension that we don't
2000 namestring
= set_namestring (objfile
, nlist
);
2002 /* Find the corresponding bincl and mark that psymtab on the
2003 psymtab dependency list */
2005 struct partial_symtab
*needed_pst
=
2006 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2008 /* If this include file was defined earlier in this file,
2010 if (needed_pst
== pst
)
2018 for (i
= 0; i
< dependencies_used
; i
++)
2019 if (dependency_list
[i
] == needed_pst
)
2025 /* If it's already in the list, skip the rest. */
2029 dependency_list
[dependencies_used
++] = needed_pst
;
2030 if (dependencies_used
>= dependencies_allocated
)
2032 struct partial_symtab
**orig
= dependency_list
;
2034 (struct partial_symtab
**)
2035 alloca ((dependencies_allocated
*= 2)
2036 * sizeof (struct partial_symtab
*));
2037 memcpy (dependency_list
, orig
,
2039 * sizeof (struct partial_symtab
*)));
2041 fprintf_unfiltered (gdb_stderr
, "Had to reallocate dependency list.\n");
2042 fprintf_unfiltered (gdb_stderr
, "New dependencies allocated: %d\n",
2043 dependencies_allocated
);
2051 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2052 /* Solaris 2 end of module, finish current partial symbol table.
2053 end_psymtab will set pst->texthigh to the proper value, which
2054 is necessary if a module compiled without debugging info
2055 follows this module. */
2058 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2059 symnum
* symbol_size
,
2061 dependency_list
, dependencies_used
, textlow_not_set
);
2062 pst
= (struct partial_symtab
*) 0;
2064 dependencies_used
= 0;
2071 HANDLE_RBRAC (nlist
.n_value
);
2077 case N_SSYM
: /* Claim: Structure or union element.
2078 Hopefully, I can ignore this. */
2079 case N_ENTRY
: /* Alternate entry point; can ignore. */
2080 case N_MAIN
: /* Can definitely ignore this. */
2081 case N_CATCH
: /* These are GNU C++ extensions */
2082 case N_EHDECL
: /* that can safely be ignored here. */
2092 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2093 case N_DEFD
: /* GNU Modula-2 */
2094 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2096 case N_OBJ
: /* useless types from Solaris */
2098 /* These symbols aren't interesting; don't worry about them */
2103 /* If we haven't found it yet, ignore it. It's probably some
2104 new type we don't know about yet. */
2105 unknown_symtype_complaint (local_hex_string (nlist
.n_type
));
2110 /* If there's stuff to be cleaned up, clean it up. */
2111 if (DBX_SYMCOUNT (objfile
) > 0 /* We have some syms */
2112 /*FIXME, does this have a bug at start address 0? */
2113 && last_o_file_start
2114 && objfile
->ei
.entry_point
< nlist
.n_value
2115 && objfile
->ei
.entry_point
>= last_o_file_start
)
2117 objfile
->ei
.deprecated_entry_file_lowpc
= last_o_file_start
;
2118 objfile
->ei
.deprecated_entry_file_highpc
= nlist
.n_value
;
2123 /* Don't set pst->texthigh lower than it already is. */
2124 CORE_ADDR text_end
=
2125 (lowest_text_address
== (CORE_ADDR
) -1
2126 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)))
2127 : lowest_text_address
)
2130 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2131 symnum
* symbol_size
,
2132 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2133 dependency_list
, dependencies_used
, textlow_not_set
);
2136 do_cleanups (back_to
);
2139 /* Allocate and partially fill a partial symtab. It will be
2140 completely filled at the end of the symbol list.
2142 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2143 is the address relative to which its symbols are (incremental) or 0
2147 static struct partial_symtab
*
2148 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2149 int ldsymoff
, struct partial_symbol
**global_syms
,
2150 struct partial_symbol
**static_syms
)
2152 struct partial_symtab
*result
=
2153 start_psymtab_common (objfile
, objfile
->section_offsets
,
2154 filename
, textlow
, global_syms
, static_syms
);
2156 result
->read_symtab_private
= (char *)
2157 obstack_alloc (&objfile
->psymbol_obstack
, sizeof (struct symloc
));
2158 LDSYMOFF (result
) = ldsymoff
;
2159 result
->read_symtab
= dbx_psymtab_to_symtab
;
2160 SYMBOL_SIZE (result
) = symbol_size
;
2161 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2162 STRING_OFFSET (result
) = string_table_offset
;
2163 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2165 /* If we're handling an ELF file, drag some section-relocation info
2166 for this source file out of the ELF symbol table, to compensate for
2167 Sun brain death. This replaces the section_offsets in this psymtab,
2169 elfstab_offset_sections (objfile
, result
);
2171 /* Deduce the source language from the filename for this psymtab. */
2172 psymtab_language
= deduce_language_from_filename (filename
);
2177 /* Close off the current usage of PST.
2178 Returns PST or NULL if the partial symtab was empty and thrown away.
2180 FIXME: List variables and peculiarities of same. */
2182 struct partial_symtab
*
2183 end_psymtab (struct partial_symtab
*pst
, char **include_list
, int num_includes
,
2184 int capping_symbol_offset
, CORE_ADDR capping_text
,
2185 struct partial_symtab
**dependency_list
, int number_dependencies
,
2186 int textlow_not_set
)
2189 struct objfile
*objfile
= pst
->objfile
;
2191 if (capping_symbol_offset
!= -1)
2192 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2193 pst
->texthigh
= capping_text
;
2195 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2196 /* Under Solaris, the N_SO symbols always have a value of 0,
2197 instead of the usual address of the .o file. Therefore,
2198 we have to do some tricks to fill in texthigh and textlow.
2199 The first trick is: if we see a static
2200 or global function, and the textlow for the current pst
2201 is not set (ie: textlow_not_set), then we use that function's
2202 address for the textlow of the pst. */
2204 /* Now, to fill in texthigh, we remember the last function seen
2205 in the .o file. Also, there's a hack in
2206 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2207 to here via the misc_info field. Therefore, we can fill in
2208 a reliable texthigh by taking the address plus size of the
2209 last function in the file. */
2211 if (pst
->texthigh
== 0 && last_function_name
)
2215 struct minimal_symbol
*minsym
;
2217 p
= strchr (last_function_name
, ':');
2219 p
= last_function_name
;
2220 n
= p
- last_function_name
;
2222 strncpy (p
, last_function_name
, n
);
2225 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2228 /* Sun Fortran appends an underscore to the minimal symbol name,
2229 try again with an appended underscore if the minimal symbol
2233 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2237 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
2239 last_function_name
= NULL
;
2242 /* this test will be true if the last .o file is only data */
2243 if (textlow_not_set
)
2244 pst
->textlow
= pst
->texthigh
;
2247 struct partial_symtab
*p1
;
2249 /* If we know our own starting text address, then walk through all other
2250 psymtabs for this objfile, and if any didn't know their ending text
2251 address, set it to our starting address. Take care to not set our
2252 own ending address to our starting address, nor to set addresses on
2253 `dependency' files that have both textlow and texthigh zero. */
2255 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2257 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2259 p1
->texthigh
= pst
->textlow
;
2260 /* if this file has only data, then make textlow match texthigh */
2261 if (p1
->textlow
== 0)
2262 p1
->textlow
= p1
->texthigh
;
2267 /* End of kludge for patching Solaris textlow and texthigh. */
2268 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
2270 pst
->n_global_syms
=
2271 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2272 pst
->n_static_syms
=
2273 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2275 pst
->number_of_dependencies
= number_dependencies
;
2276 if (number_dependencies
)
2278 pst
->dependencies
= (struct partial_symtab
**)
2279 obstack_alloc (&objfile
->psymbol_obstack
,
2280 number_dependencies
* sizeof (struct partial_symtab
*));
2281 memcpy (pst
->dependencies
, dependency_list
,
2282 number_dependencies
* sizeof (struct partial_symtab
*));
2285 pst
->dependencies
= 0;
2287 for (i
= 0; i
< num_includes
; i
++)
2289 struct partial_symtab
*subpst
=
2290 allocate_psymtab (include_list
[i
], objfile
);
2292 /* Copy the sesction_offsets array from the main psymtab. */
2293 subpst
->section_offsets
= pst
->section_offsets
;
2294 subpst
->read_symtab_private
=
2295 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
2296 sizeof (struct symloc
));
2300 subpst
->texthigh
= 0;
2302 /* We could save slight bits of space by only making one of these,
2303 shared by the entire set of include files. FIXME-someday. */
2304 subpst
->dependencies
= (struct partial_symtab
**)
2305 obstack_alloc (&objfile
->psymbol_obstack
,
2306 sizeof (struct partial_symtab
*));
2307 subpst
->dependencies
[0] = pst
;
2308 subpst
->number_of_dependencies
= 1;
2310 subpst
->globals_offset
=
2311 subpst
->n_global_syms
=
2312 subpst
->statics_offset
=
2313 subpst
->n_static_syms
= 0;
2317 subpst
->read_symtab
= pst
->read_symtab
;
2320 sort_pst_symbols (pst
);
2322 /* If there is already a psymtab or symtab for a file of this name, remove it.
2323 (If there is a symtab, more drastic things also happen.)
2324 This happens in VxWorks. */
2325 free_named_symtabs (pst
->filename
);
2327 if (num_includes
== 0
2328 && number_dependencies
== 0
2329 && pst
->n_global_syms
== 0
2330 && pst
->n_static_syms
== 0
2331 && has_line_numbers
== 0)
2333 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2334 it is on the obstack, but we can forget to chain it on the list. */
2335 /* Empty psymtabs happen as a result of header files which don't have
2336 any symbols in them. There can be a lot of them. But this check
2337 is wrong, in that a psymtab with N_SLINE entries but nothing else
2338 is not empty, but we don't realize that. Fixing that without slowing
2339 things down might be tricky. */
2341 discard_psymtab (pst
);
2343 /* Indicate that psymtab was thrown away. */
2344 pst
= (struct partial_symtab
*) NULL
;
2350 dbx_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2352 struct cleanup
*old_chain
;
2360 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
2365 /* Read in all partial symtabs on which this one is dependent */
2366 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2367 if (!pst
->dependencies
[i
]->readin
)
2369 /* Inform about additional files that need to be read in. */
2372 fputs_filtered (" ", gdb_stdout
);
2374 fputs_filtered ("and ", gdb_stdout
);
2376 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2377 wrap_here (""); /* Flush output */
2378 gdb_flush (gdb_stdout
);
2380 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2383 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy */
2385 /* Init stuff necessary for reading in symbols */
2388 old_chain
= make_cleanup (really_free_pendings
, 0);
2389 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2390 symbol_size
= SYMBOL_SIZE (pst
);
2392 /* Read in this file's symbols */
2393 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2394 read_ofile_symtab (pst
);
2396 do_cleanups (old_chain
);
2402 /* Read in all of the symbols for a given psymtab for real.
2403 Be verbose about it if the user wants that. */
2406 dbx_psymtab_to_symtab (struct partial_symtab
*pst
)
2409 struct cleanup
*back_to
= NULL
;
2416 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
2421 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
2423 /* Print the message now, before reading the string table,
2424 to avoid disconcerting pauses. */
2427 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2428 gdb_flush (gdb_stdout
);
2431 sym_bfd
= pst
->objfile
->obfd
;
2433 next_symbol_text_func
= dbx_next_symbol_text
;
2435 if (DBX_STAB_SECTION (pst
->objfile
))
2438 = symfile_relocate_debug_section (pst
->objfile
->obfd
,
2439 DBX_STAB_SECTION (pst
->objfile
),
2442 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
2445 dbx_psymtab_to_symtab_1 (pst
);
2448 do_cleanups (back_to
);
2450 /* Match with global symbols. This only needs to be done once,
2451 after all of the symtabs and dependencies have been read in. */
2452 scan_file_globals (pst
->objfile
);
2454 /* Finish up the debug error message. */
2456 printf_filtered ("done.\n");
2460 /* Read in a defined section of a specific object file's symbols. */
2463 read_ofile_symtab (struct partial_symtab
*pst
)
2466 struct external_nlist
*bufp
;
2467 struct internal_nlist nlist
;
2469 unsigned max_symnum
;
2471 struct objfile
*objfile
;
2472 int sym_offset
; /* Offset to start of symbols to read */
2473 int sym_size
; /* Size of symbols to read */
2474 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2475 int text_size
; /* Size of text segment for symbols */
2476 struct section_offsets
*section_offsets
;
2478 objfile
= pst
->objfile
;
2479 sym_offset
= LDSYMOFF (pst
);
2480 sym_size
= LDSYMLEN (pst
);
2481 text_offset
= pst
->textlow
;
2482 text_size
= pst
->texthigh
- pst
->textlow
;
2483 /* This cannot be simply objfile->section_offsets because of
2484 elfstab_offset_sections() which initializes the psymtab section
2485 offsets information in a special way, and that is different from
2486 objfile->section_offsets. */
2487 section_offsets
= pst
->section_offsets
;
2489 current_objfile
= objfile
;
2490 subfile_stack
= NULL
;
2492 stringtab_global
= DBX_STRINGTAB (objfile
);
2493 last_source_file
= NULL
;
2495 abfd
= objfile
->obfd
;
2496 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
2497 symbuf_end
= symbuf_idx
= 0;
2499 symbuf_left
= sym_offset
+ sym_size
;
2501 /* It is necessary to actually read one symbol *before* the start
2502 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2503 occurs before the N_SO symbol.
2505 Detecting this in read_dbx_symtab
2506 would slow down initial readin, so we look for it here instead. */
2507 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2509 stabs_seek (sym_offset
- symbol_size
);
2511 bufp
= &symbuf
[symbuf_idx
++];
2512 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2513 OBJSTAT (objfile
, n_stabs
++);
2515 namestring
= set_namestring (objfile
, nlist
);
2517 processing_gcc_compilation
= 0;
2518 if (nlist
.n_type
== N_TEXT
)
2520 const char *tempstring
= namestring
;
2522 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
2523 processing_gcc_compilation
= 1;
2524 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
2525 processing_gcc_compilation
= 2;
2526 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2528 if (STREQN (tempstring
, "__gnu_compiled", 14))
2529 processing_gcc_compilation
= 2;
2532 /* Try to select a C++ demangling based on the compilation unit
2536 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2537 know whether it will use the old style or v3 mangling. */
2538 if (processing_gcc_compilation
)
2540 if (AUTO_DEMANGLING
)
2542 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2549 /* The N_SO starting this symtab is the first symbol, so we
2550 better not check the symbol before it. I'm not this can
2551 happen, but it doesn't hurt to check for it. */
2552 stabs_seek (sym_offset
);
2553 processing_gcc_compilation
= 0;
2556 if (symbuf_idx
== symbuf_end
)
2558 bufp
= &symbuf
[symbuf_idx
];
2559 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2560 error ("First symbol in segment of executable not a source symbol");
2562 max_symnum
= sym_size
/ symbol_size
;
2565 symnum
< max_symnum
;
2568 QUIT
; /* Allow this to be interruptable */
2569 if (symbuf_idx
== symbuf_end
)
2571 bufp
= &symbuf
[symbuf_idx
++];
2572 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2573 OBJSTAT (objfile
, n_stabs
++);
2575 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2577 namestring
= set_namestring (objfile
, nlist
);
2581 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2582 namestring
, section_offsets
, objfile
);
2584 /* We skip checking for a new .o or -l file; that should never
2585 happen in this routine. */
2586 else if (type
== N_TEXT
)
2588 /* I don't think this code will ever be executed, because
2589 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2590 the N_SO symbol which starts this source file.
2591 However, there is no reason not to accept
2592 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2594 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
2595 processing_gcc_compilation
= 1;
2596 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
2597 processing_gcc_compilation
= 2;
2600 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2601 know whether it will use the old style or v3 mangling. */
2602 if (AUTO_DEMANGLING
)
2604 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2608 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2609 || type
== (unsigned char) N_NBTEXT
2612 /* Global symbol: see if we came across a dbx defintion for
2613 a corresponding symbol. If so, store the value. Remove
2614 syms from the chain when their values are stored, but
2615 search the whole chain, as there may be several syms from
2616 different files with the same name. */
2617 /* This is probably not true. Since the files will be read
2618 in one at a time, each reference to a global symbol will
2619 be satisfied in each file as it appears. So we skip this
2625 current_objfile
= NULL
;
2627 /* In a Solaris elf file, this variable, which comes from the
2628 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2629 which comes from pst->textlow is correct. */
2630 if (last_source_start_addr
== 0)
2631 last_source_start_addr
= text_offset
;
2633 /* In reordered executables last_source_start_addr may not be the
2634 lower bound for this symtab, instead use text_offset which comes
2635 from pst->textlow which is correct. */
2636 if (last_source_start_addr
> text_offset
)
2637 last_source_start_addr
= text_offset
;
2639 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
, SECT_OFF_TEXT (objfile
));
2645 /* This handles a single symbol from the symbol-file, building symbols
2646 into a GDB symtab. It takes these arguments and an implicit argument.
2648 TYPE is the type field of the ".stab" symbol entry.
2649 DESC is the desc field of the ".stab" entry.
2650 VALU is the value field of the ".stab" entry.
2651 NAME is the symbol name, in our address space.
2652 SECTION_OFFSETS is a set of amounts by which the sections of this object
2653 file were relocated when it was loaded into memory.
2654 Note that these section_offsets are not the
2655 objfile->section_offsets but the pst->section_offsets.
2656 All symbols that refer
2657 to memory locations need to be offset by these amounts.
2658 OBJFILE is the object file from which we are reading symbols.
2659 It is used in end_symtab. */
2662 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2663 struct section_offsets
*section_offsets
,
2664 struct objfile
*objfile
)
2666 #ifdef SUN_FIXED_LBRAC_BUG
2667 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
2668 to correct the address of N_LBRAC's. If it is not defined, then
2669 we never need to correct the addresses. */
2671 /* This records the last pc address we've seen. We depend on there being
2672 an SLINE or FUN or SO before the first LBRAC, since the variable does
2673 not get reset in between reads of different symbol files. */
2674 static CORE_ADDR last_pc_address
;
2677 struct context_stack
*new;
2678 /* This remembers the address of the start of a function. It is used
2679 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
2680 relative to the current function's start address. On systems
2681 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
2682 used to relocate these symbol types rather than SECTION_OFFSETS. */
2683 static CORE_ADDR function_start_offset
;
2685 /* This holds the address of the start of a function, without the system
2686 peculiarities of function_start_offset. */
2687 static CORE_ADDR last_function_start
;
2689 /* If this is nonzero, we've seen an N_SLINE since the start of the
2690 current function. We use this to tell us to move the first sline
2691 to the beginning of the function regardless of what its given
2693 static int sline_found_in_function
= 1;
2695 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
2696 file. Used to detect the SunPRO solaris compiler. */
2697 static int n_opt_found
;
2699 /* The stab type used for the definition of the last function.
2700 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2701 static int function_stab_type
= 0;
2703 if (!block_address_function_relative
)
2704 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2705 function start address, so just use the text offset. */
2706 function_start_offset
= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2708 /* Something is wrong if we see real data before
2709 seeing a source file name. */
2711 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
2713 /* Ignore any symbols which appear before an N_SO symbol.
2714 Currently no one puts symbols there, but we should deal
2715 gracefully with the case. A complain()t might be in order,
2716 but this should not be an error (). */
2725 if (*name
== '\000')
2727 /* This N_FUN marks the end of a function. This closes off the
2730 if (context_stack_depth
<= 0)
2732 lbrac_mismatch_complaint (symnum
);
2736 /* The following check is added before recording line 0 at
2737 end of function so as to handle hand-generated stabs
2738 which may have an N_FUN stabs at the end of the function, but
2739 no N_SLINE stabs. */
2740 if (sline_found_in_function
)
2741 record_line (current_subfile
, 0, last_function_start
+ valu
);
2743 within_function
= 0;
2744 new = pop_context ();
2746 /* Make a block for the local symbols within. */
2747 finish_block (new->name
, &local_symbols
, new->old_blocks
,
2748 new->start_addr
, new->start_addr
+ valu
,
2751 /* May be switching to an assembler file which may not be using
2752 block relative stabs, so reset the offset. */
2753 if (block_address_function_relative
)
2754 function_start_offset
= 0;
2759 sline_found_in_function
= 0;
2761 /* Relocate for dynamic loading */
2762 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2763 valu
= SMASH_TEXT_ADDRESS (valu
);
2764 last_function_start
= valu
;
2766 goto define_a_symbol
;
2769 /* This "symbol" just indicates the start of an inner lexical
2770 context within a function. */
2772 /* Ignore extra outermost context from SunPRO cc and acc. */
2773 if (n_opt_found
&& desc
== 1)
2776 if (block_address_function_relative
)
2777 /* Relocate for Sun ELF acc fn-relative syms. */
2778 valu
+= function_start_offset
;
2780 /* On most machines, the block addresses are relative to the
2781 N_SO, the linker did not relocate them (sigh). */
2782 valu
+= last_source_start_addr
;
2784 #ifdef SUN_FIXED_LBRAC_BUG
2785 if (!SUN_FIXED_LBRAC_BUG
&& valu
< last_pc_address
)
2787 /* Patch current LBRAC pc value to match last handy pc value */
2788 complaint (&symfile_complaints
, "bad block start address patched");
2789 valu
= last_pc_address
;
2792 new = push_context (desc
, valu
);
2796 /* This "symbol" just indicates the end of an inner lexical
2797 context that was started with N_LBRAC. */
2799 /* Ignore extra outermost context from SunPRO cc and acc. */
2800 if (n_opt_found
&& desc
== 1)
2803 if (block_address_function_relative
)
2804 /* Relocate for Sun ELF acc fn-relative syms. */
2805 valu
+= function_start_offset
;
2807 /* On most machines, the block addresses are relative to the
2808 N_SO, the linker did not relocate them (sigh). */
2809 valu
+= last_source_start_addr
;
2811 if (context_stack_depth
<= 0)
2813 lbrac_mismatch_complaint (symnum
);
2817 new = pop_context ();
2818 if (desc
!= new->depth
)
2819 lbrac_mismatch_complaint (symnum
);
2821 /* Some compilers put the variable decls inside of an
2822 LBRAC/RBRAC block. This macro should be nonzero if this
2823 is true. DESC is N_DESC from the N_RBRAC symbol.
2824 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
2825 or the GCC2_COMPILED_SYMBOL. */
2826 #if !defined (VARIABLES_INSIDE_BLOCK)
2827 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2830 /* Can only use new->locals as local symbols here if we're in
2831 gcc or on a machine that puts them before the lbrack. */
2832 if (!VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2834 if (local_symbols
!= NULL
)
2836 /* GCC development snapshots from March to December of
2837 2000 would output N_LSYM entries after N_LBRAC
2838 entries. As a consequence, these symbols are simply
2839 discarded. Complain if this is the case. Note that
2840 there are some compilers which legitimately put local
2841 symbols within an LBRAC/RBRAC block; this complaint
2842 might also help sort out problems in which
2843 VARIABLES_INSIDE_BLOCK is incorrectly defined. */
2844 complaint (&symfile_complaints
,
2845 "misplaced N_LBRAC entry; discarding local symbols which have no enclosing block");
2847 local_symbols
= new->locals
;
2850 if (context_stack_depth
2851 > !VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2853 /* This is not the outermost LBRAC...RBRAC pair in the function,
2854 its local symbols preceded it, and are the ones just recovered
2855 from the context stack. Define the block for them (but don't
2856 bother if the block contains no symbols. Should we complain
2857 on blocks without symbols? I can't think of any useful purpose
2859 if (local_symbols
!= NULL
)
2861 /* Muzzle a compiler bug that makes end < start. (which
2862 compilers? Is this ever harmful?). */
2863 if (new->start_addr
> valu
)
2865 complaint (&symfile_complaints
,
2866 "block start larger than block end");
2867 new->start_addr
= valu
;
2869 /* Make a block for the local symbols within. */
2870 finish_block (0, &local_symbols
, new->old_blocks
,
2871 new->start_addr
, valu
, objfile
);
2876 /* This is the outermost LBRAC...RBRAC pair. There is no
2877 need to do anything; leave the symbols that preceded it
2878 to be attached to the function's own block. We need to
2879 indicate that we just moved outside of the function. */
2880 within_function
= 0;
2883 if (VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2884 /* Now pop locals of block just finished. */
2885 local_symbols
= new->locals
;
2890 /* This kind of symbol indicates the start of an object file. */
2891 /* Relocate for dynamic loading */
2892 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2896 /* This type of symbol indicates the start of data
2897 for one source file.
2898 Finish the symbol table of the previous source file
2899 (if any) and start accumulating a new symbol table. */
2900 /* Relocate for dynamic loading */
2901 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2905 #ifdef SUN_FIXED_LBRAC_BUG
2906 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2909 #ifdef PCC_SOL_BROKEN
2910 /* pcc bug, occasionally puts out SO for SOL. */
2911 if (context_stack_depth
> 0)
2913 start_subfile (name
, NULL
);
2917 if (last_source_file
)
2919 /* Check if previous symbol was also an N_SO (with some
2920 sanity checks). If so, that one was actually the directory
2921 name, and the current one is the real file name.
2923 if (previous_stab_code
== (unsigned char) N_SO
)
2925 patch_subfile_names (current_subfile
, name
);
2926 break; /* Ignore repeated SOs */
2928 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2932 /* Null name means this just marks the end of text for this .o file.
2933 Don't start a new symtab in this case. */
2934 if (*name
== '\000')
2937 if (block_address_function_relative
)
2938 function_start_offset
= 0;
2941 start_symtab (name
, NULL
, valu
);
2942 record_debugformat ("stabs");
2946 /* This type of symbol indicates the start of data for
2947 a sub-source-file, one whose contents were copied or
2948 included in the compilation of the main source file
2949 (whose name was given in the N_SO symbol.) */
2950 /* Relocate for dynamic loading */
2951 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2952 start_subfile (name
, current_subfile
->dirname
);
2957 add_new_header_file (name
, valu
);
2958 start_subfile (name
, current_subfile
->dirname
);
2962 start_subfile (pop_subfile (), current_subfile
->dirname
);
2966 add_old_header_file (name
, valu
);
2970 /* This type of "symbol" really just records
2971 one line-number -- core-address correspondence.
2972 Enter it in the line list for this symbol table. */
2974 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
2975 valu
+= function_start_offset
;
2977 #ifdef SUN_FIXED_LBRAC_BUG
2978 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2980 /* If this is the first SLINE note in the function, record it at
2981 the start of the function instead of at the listed location. */
2982 if (within_function
&& sline_found_in_function
== 0)
2984 record_line (current_subfile
, desc
, last_function_start
);
2985 sline_found_in_function
= 1;
2988 record_line (current_subfile
, desc
, valu
);
2992 common_block_start (name
, objfile
);
2996 common_block_end (objfile
);
2999 /* The following symbol types need to have the appropriate offset added
3000 to their value; then we process symbol definitions in the name. */
3002 case N_STSYM
: /* Static symbol in data seg */
3003 case N_LCSYM
: /* Static symbol in BSS seg */
3004 case N_ROSYM
: /* Static symbol in Read-only data seg */
3005 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3006 Solaris2's stabs-in-elf makes *most* symbols relative
3007 but leaves a few absolute (at least for Solaris 2.1 and version
3008 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
3009 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
3010 .stab "foo:V...",N_STSYM is relative (section base subtracted).
3011 This leaves us no choice but to search for the 'S' or 'V'...
3012 (or pass the whole section_offsets stuff down ONE MORE function
3013 call level, which we really don't want to do). */
3017 /* .o files and NLMs have non-zero text seg offsets, but don't need
3018 their static syms offset in this fashion. XXX - This is really a
3019 crock that should be fixed in the solib handling code so that I
3020 don't have to work around it here. */
3022 if (!symfile_relocatable
)
3024 p
= strchr (name
, ':');
3025 if (p
!= 0 && p
[1] == 'S')
3027 /* The linker relocated it. We don't want to add an
3028 elfstab_offset_sections-type offset, but we *do* want
3029 to add whatever solib.c passed to symbol_file_add as
3030 addr (this is known to affect SunOS4, and I suspect ELF
3031 too). Since elfstab_offset_sections currently does not
3032 muck with the text offset (there is no Ttext.text
3033 symbol), we can get addr from the text offset. If
3034 elfstab_offset_sections ever starts dealing with the
3035 text offset, and we still need to do this, we need to
3036 invent a SECT_OFF_ADDR_KLUDGE or something. */
3037 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3038 goto define_a_symbol
;
3041 /* Since it's not the kludge case, re-dispatch to the right handler. */
3051 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
3055 case_N_STSYM
: /* Static symbol in data seg */
3056 case N_DSLINE
: /* Source line number, data seg */
3057 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3058 goto define_a_symbol
;
3060 case_N_LCSYM
: /* Static symbol in BSS seg */
3061 case N_BSLINE
: /* Source line number, bss seg */
3062 /* N_BROWS: overlaps with N_BSLINE */
3063 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3064 goto define_a_symbol
;
3066 case_N_ROSYM
: /* Static symbol in Read-only data seg */
3067 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3068 goto define_a_symbol
;
3070 case N_ENTRY
: /* Alternate entry point */
3071 /* Relocate for dynamic loading */
3072 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3073 goto define_a_symbol
;
3075 /* The following symbol types we don't know how to process. Handle
3076 them in a "default" way, but complain to people who care. */
3078 case N_CATCH
: /* Exception handler catcher */
3079 case N_EHDECL
: /* Exception handler name */
3080 case N_PC
: /* Global symbol in Pascal */
3081 case N_M2C
: /* Modula-2 compilation unit */
3082 /* N_MOD2: overlaps with N_EHDECL */
3083 case N_SCOPE
: /* Modula-2 scope information */
3084 case N_ECOML
: /* End common (local name) */
3085 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3090 unknown_symtype_complaint (local_hex_string (type
));
3093 /* The following symbol types don't need the address field relocated,
3094 since it is either unused, or is absolute. */
3096 case N_GSYM
: /* Global variable */
3097 case N_NSYMS
: /* Number of symbols (ultrix) */
3098 case N_NOMAP
: /* No map? (ultrix) */
3099 case N_RSYM
: /* Register variable */
3100 case N_DEFD
: /* Modula-2 GNU module dependency */
3101 case N_SSYM
: /* Struct or union element */
3102 case N_LSYM
: /* Local symbol in stack */
3103 case N_PSYM
: /* Parameter variable */
3104 case N_LENG
: /* Length of preceding symbol type */
3108 char *colon_pos
= strchr (name
, ':');
3109 if (colon_pos
== NULL
)
3112 deftype
= colon_pos
[1];
3118 function_stab_type
= type
;
3120 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
3121 /* Deal with the SunPRO 3.0 compiler which omits the address
3122 from N_FUN symbols. */
3124 && valu
== ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
)))
3126 CORE_ADDR minsym_valu
=
3127 find_stab_function_addr (name
, last_source_file
, objfile
);
3129 /* find_stab_function_addr will return 0 if the minimal
3130 symbol wasn't found. (Unfortunately, this might also
3131 be a valid address.) Anyway, if it *does* return 0,
3132 it is likely that the value was set correctly to begin
3134 if (minsym_valu
!= 0)
3139 #ifdef SUN_FIXED_LBRAC_BUG
3140 /* The Sun acc compiler, under SunOS4, puts out
3141 functions with N_GSYM or N_STSYM. The problem is
3142 that the address of the symbol is no good (for N_GSYM
3143 it doesn't even attept an address; for N_STSYM it
3144 puts out an address but then it gets relocated
3145 relative to the data segment, not the text segment).
3146 Currently we can't fix this up later as we do for
3147 some types of symbol in scan_file_globals.
3148 Fortunately we do have a way of finding the address -
3149 we know that the value in last_pc_address is either
3150 the one we want (if we're dealing with the first
3151 function in an object file), or somewhere in the
3152 previous function. This means that we can use the
3153 minimal symbol table to get the address. */
3155 /* Starting with release 3.0, the Sun acc compiler,
3156 under SunOS4, puts out functions with N_FUN and a value
3157 of zero. This gets relocated to the start of the text
3158 segment of the module, which is no good either.
3159 Under SunOS4 we can deal with this as N_SLINE and N_SO
3160 entries contain valid absolute addresses.
3161 Release 3.0 acc also puts out N_OPT entries, which makes
3162 it possible to discern acc from cc or gcc. */
3164 if (type
== N_GSYM
|| type
== N_STSYM
3166 && n_opt_found
&& !block_address_function_relative
))
3168 struct minimal_symbol
*m
;
3169 int l
= colon_pos
- name
;
3171 m
= lookup_minimal_symbol_by_pc (last_pc_address
);
3172 if (m
&& STREQN (DEPRECATED_SYMBOL_NAME (m
), name
, l
)
3173 && DEPRECATED_SYMBOL_NAME (m
)[l
] == '\0')
3174 /* last_pc_address was in this function */
3175 valu
= SYMBOL_VALUE (m
);
3176 else if (m
&& DEPRECATED_SYMBOL_NAME (m
+ 1)
3177 && STREQN (DEPRECATED_SYMBOL_NAME (m
+ 1), name
, l
)
3178 && DEPRECATED_SYMBOL_NAME (m
+ 1)[l
] == '\0')
3179 /* last_pc_address was in last function */
3180 valu
= SYMBOL_VALUE (m
+ 1);
3182 /* Not found - use last_pc_address (for finish_block) */
3183 valu
= last_pc_address
;
3186 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
3189 if (block_address_function_relative
)
3190 /* For Solaris 2.0 compilers, the block addresses and
3191 N_SLINE's are relative to the start of the
3192 function. On normal systems, and when using gcc on
3193 Solaris 2.0, these addresses are just absolute, or
3194 relative to the N_SO, depending on
3195 BLOCK_ADDRESS_ABSOLUTE. */
3196 function_start_offset
= valu
;
3198 within_function
= 1;
3200 if (context_stack_depth
> 1)
3202 complaint (&symfile_complaints
,
3203 "unmatched N_LBRAC before symtab pos %d", symnum
);
3207 if (context_stack_depth
> 0)
3209 new = pop_context ();
3210 /* Make a block for the local symbols within. */
3211 finish_block (new->name
, &local_symbols
, new->old_blocks
,
3212 new->start_addr
, valu
, objfile
);
3215 new = push_context (0, valu
);
3216 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3220 define_symbol (valu
, name
, desc
, type
, objfile
);
3226 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3227 for a bunch of other flags, too. Someday we may parse their
3228 flags; for now we ignore theirs and hope they'll ignore ours. */
3229 case N_OPT
: /* Solaris 2: Compiler options */
3232 if (STREQ (name
, GCC2_COMPILED_FLAG_SYMBOL
))
3234 processing_gcc_compilation
= 2;
3235 #if 0 /* Works, but is experimental. -fnf */
3236 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
3237 know whether it will use the old style or v3 mangling. */
3238 if (AUTO_DEMANGLING
)
3240 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
3249 case N_MAIN
: /* Name of main routine. */
3250 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3251 it with a symbol file with "main" and without N_MAIN. I'm
3252 not sure exactly what rule to follow but probably something
3253 like: N_MAIN takes precedence over "main" no matter what
3254 objfile it is in; If there is more than one N_MAIN, choose
3255 the one in the symfile_objfile; If there is more than one
3256 N_MAIN within a given objfile, complain() and choose
3257 arbitrarily. (kingdon) */
3259 set_main_name (name
);
3262 /* The following symbol types can be ignored. */
3263 case N_OBJ
: /* Solaris 2: Object file dir and name */
3264 /* N_UNDF: Solaris 2: file separator mark */
3265 /* N_UNDF: -- we will never encounter it, since we only process one
3266 file's symbols at once. */
3267 case N_ENDM
: /* Solaris 2: End of module */
3268 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3272 /* '#' is a GNU C extension to allow one symbol to refer to another
3275 Generally this is used so that an alias can refer to its main
3279 /* Initialize symbol reference names and determine if this is
3280 a definition. If symbol reference is being defined, go
3281 ahead and add it. Otherwise, just return sym. */
3286 /* If this stab defines a new reference ID that is not on the
3287 reference list, then put it on the reference list.
3289 We go ahead and advance NAME past the reference, even though
3290 it is not strictly necessary at this time. */
3291 refnum
= symbol_reference_defined (&s
);
3293 if (!ref_search (refnum
))
3294 ref_add (refnum
, 0, name
, valu
);
3299 previous_stab_code
= type
;
3302 /* FIXME: The only difference between this and elfstab_build_psymtabs
3303 is the call to install_minimal_symbols for elf, and the support for
3304 split sections. If the differences are really that small, the code
3305 should be shared. */
3307 /* Scan and build partial symbols for an coff symbol file.
3308 The coff file has already been processed to get its minimal symbols.
3310 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3313 OBJFILE is the object file we are reading symbols from.
3314 ADDR is the address relative to which the symbols are (e.g.
3315 the base address of the text segment).
3316 MAINLINE is true if we are reading the main symbol
3317 table (as opposed to a shared lib or dynamically loaded file).
3318 TEXTADDR is the address of the text section.
3319 TEXTSIZE is the size of the text section.
3320 STABSECTS is the list of .stab sections in OBJFILE.
3321 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3322 .stabstr section exists.
3324 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3325 adjusted for coff details. */
3328 coffstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3329 CORE_ADDR textaddr
, unsigned int textsize
,
3330 struct stab_section_list
*stabsects
,
3331 file_ptr stabstroffset
, unsigned int stabstrsize
)
3334 bfd
*sym_bfd
= objfile
->obfd
;
3335 char *name
= bfd_get_filename (sym_bfd
);
3336 struct dbx_symfile_info
*info
;
3337 unsigned int stabsize
;
3339 /* There is already a dbx_symfile_info allocated by our caller.
3340 It might even contain some info from the coff symtab to help us. */
3341 info
= objfile
->sym_stab_info
;
3343 DBX_TEXT_ADDR (objfile
) = textaddr
;
3344 DBX_TEXT_SIZE (objfile
) = textsize
;
3346 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3347 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3348 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3350 if (stabstrsize
> bfd_get_size (sym_bfd
))
3351 error ("ridiculous string table size: %d bytes", stabstrsize
);
3352 DBX_STRINGTAB (objfile
) = (char *)
3353 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+ 1);
3354 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3356 /* Now read in the string table in one big gulp. */
3358 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3360 perror_with_name (name
);
3361 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3362 if (val
!= stabstrsize
)
3363 perror_with_name (name
);
3365 stabsread_new_init ();
3366 buildsym_new_init ();
3367 free_header_files ();
3368 init_header_files ();
3370 processing_acc_compilation
= 1;
3372 /* In a coff file, we've already installed the minimal symbols that came
3373 from the coff (non-stab) symbol table, so always act like an
3374 incremental load here. */
3375 if (stabsects
->next
== NULL
)
3377 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3378 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3379 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3383 struct stab_section_list
*stabsect
;
3385 DBX_SYMCOUNT (objfile
) = 0;
3386 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3388 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3389 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3392 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3394 symbuf_sections
= stabsects
->next
;
3395 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3399 dbx_symfile_read (objfile
, 0);
3402 /* Scan and build partial symbols for an ELF symbol file.
3403 This ELF file has already been processed to get its minimal symbols,
3404 and any DWARF symbols that were in it.
3406 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3409 OBJFILE is the object file we are reading symbols from.
3410 ADDR is the address relative to which the symbols are (e.g.
3411 the base address of the text segment).
3412 MAINLINE is true if we are reading the main symbol
3413 table (as opposed to a shared lib or dynamically loaded file).
3414 STABSECT is the BFD section information for the .stab section.
3415 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3416 .stabstr section exists.
3418 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3419 adjusted for elf details. */
3422 elfstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3424 file_ptr stabstroffset
, unsigned int stabstrsize
)
3427 bfd
*sym_bfd
= objfile
->obfd
;
3428 char *name
= bfd_get_filename (sym_bfd
);
3429 struct dbx_symfile_info
*info
;
3430 struct cleanup
*back_to
= NULL
;
3432 /* There is already a dbx_symfile_info allocated by our caller.
3433 It might even contain some info from the ELF symtab to help us. */
3434 info
= objfile
->sym_stab_info
;
3436 /* Find the first and last text address. dbx_symfile_read seems to
3438 find_text_range (sym_bfd
, objfile
);
3440 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3441 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3442 DBX_SYMCOUNT (objfile
)
3443 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3444 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3445 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3446 DBX_STAB_SECTION (objfile
) = stabsect
;
3448 if (stabstrsize
> bfd_get_size (sym_bfd
))
3449 error ("ridiculous string table size: %d bytes", stabstrsize
);
3450 DBX_STRINGTAB (objfile
) = (char *)
3451 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+ 1);
3452 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3454 /* Now read in the string table in one big gulp. */
3456 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3458 perror_with_name (name
);
3459 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3460 if (val
!= stabstrsize
)
3461 perror_with_name (name
);
3463 stabsread_new_init ();
3464 buildsym_new_init ();
3465 free_header_files ();
3466 init_header_files ();
3468 processing_acc_compilation
= 1;
3471 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3472 stabs_data
= symfile_relocate_debug_section (objfile
->obfd
, stabsect
, NULL
);
3474 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
3476 /* In an elf file, we've already installed the minimal symbols that came
3477 from the elf (non-stab) symbol table, so always act like an
3478 incremental load here. dbx_symfile_read should not generate any new
3479 minimal symbols, since we will have already read the ELF dynamic symbol
3480 table and normal symbol entries won't be in the ".stab" section; but in
3481 case it does, it will install them itself. */
3482 dbx_symfile_read (objfile
, 0);
3485 do_cleanups (back_to
);
3488 /* Scan and build partial symbols for a file with special sections for stabs
3489 and stabstrings. The file has already been processed to get its minimal
3490 symbols, and any other symbols that might be necessary to resolve GSYMs.
3492 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3495 OBJFILE is the object file we are reading symbols from.
3496 ADDR is the address relative to which the symbols are (e.g. the base address
3497 of the text segment).
3498 MAINLINE is true if we are reading the main symbol table (as opposed to a
3499 shared lib or dynamically loaded file).
3500 STAB_NAME is the name of the section that contains the stabs.
3501 STABSTR_NAME is the name of the section that contains the stab strings.
3503 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3506 stabsect_build_psymtabs (struct objfile
*objfile
, int mainline
, char *stab_name
,
3507 char *stabstr_name
, char *text_name
)
3510 bfd
*sym_bfd
= objfile
->obfd
;
3511 char *name
= bfd_get_filename (sym_bfd
);
3513 asection
*stabstrsect
;
3514 asection
*text_sect
;
3516 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3517 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3523 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
3524 stab_name
, stabstr_name
);
3526 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
3527 xmalloc (sizeof (struct dbx_symfile_info
));
3528 memset (objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
3530 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3532 error ("Can't find %s section in symbol file", text_name
);
3533 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3534 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3536 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3537 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3538 / DBX_SYMBOL_SIZE (objfile
);
3539 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3540 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3542 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3543 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile
));
3544 DBX_STRINGTAB (objfile
) = (char *)
3545 obstack_alloc (&objfile
->psymbol_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
3546 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3548 /* Now read in the string table in one big gulp. */
3550 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3551 stabstrsect
, /* bfd section */
3552 DBX_STRINGTAB (objfile
), /* input buffer */
3553 0, /* offset into section */
3554 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
3557 perror_with_name (name
);
3559 stabsread_new_init ();
3560 buildsym_new_init ();
3561 free_header_files ();
3562 init_header_files ();
3564 /* Now, do an incremental load */
3566 processing_acc_compilation
= 1;
3567 dbx_symfile_read (objfile
, 0);
3570 static struct sym_fns aout_sym_fns
=
3572 bfd_target_aout_flavour
,
3573 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
3574 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
3575 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
3576 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
3577 default_symfile_offsets
, /* sym_offsets: parse user's offsets to internal form */
3578 NULL
/* next: pointer to next struct sym_fns */
3582 _initialize_dbxread (void)
3584 add_symtab_fns (&aout_sym_fns
);