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
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>
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 inside partial-stab.h */
59 #include "complaints.h"
62 #include "aout/aout64.h"
63 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
66 /* This macro returns the size field of a minimal symbol, which is normally
67 stored in the "info" field. The macro can be overridden for specific
68 targets (e.g. MIPS16) that use the info field for other purposes. */
70 #define MSYMBOL_SIZE(msym) ((long) MSYMBOL_INFO (msym))
74 /* 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 /* Nonzero means give verbose info on gdb action. From main.c. */
120 extern int info_verbose
;
122 /* The BFD for this file -- implicit parameter to next_symbol_text. */
124 static bfd
*symfile_bfd
;
126 /* The size of each symbol in the symbol file (in external form).
127 This is set by dbx_symfile_read when building psymtabs, and by
128 dbx_psymtab_to_symtab when building symtabs. */
130 static unsigned symbol_size
;
132 /* This is the offset of the symbol table in the executable file. */
134 static unsigned symbol_table_offset
;
136 /* This is the offset of the string table in the executable file. */
138 static unsigned string_table_offset
;
140 /* For elf+stab executables, the n_strx field is not a simple index
141 into the string table. Instead, each .o file has a base offset in
142 the string table, and the associated symbols contain offsets from
143 this base. The following two variables contain the base offset for
144 the current and next .o files. */
146 static unsigned int file_string_table_offset
;
147 static unsigned int next_file_string_table_offset
;
149 /* .o and NLM files contain unrelocated addresses which are based at
150 0. When non-zero, this flag disables some of the special cases for
151 Solaris elf+stab text addresses at location 0. */
153 static int symfile_relocatable
= 0;
155 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
156 relative to the function start address. */
158 static int block_address_function_relative
= 0;
160 /* The lowest text address we have yet encountered. This is needed
161 because in an a.out file, there is no header field which tells us
162 what address the program is actually going to be loaded at, so we
163 need to make guesses based on the symbols (which *are* relocated to
164 reflect the address it will be loaded at). */
166 static CORE_ADDR lowest_text_address
;
168 /* Non-zero if there is any line number info in the objfile. Prevents
169 end_psymtab from discarding an otherwise empty psymtab. */
171 static int has_line_numbers
;
173 /* Complaints about the symbols we have encountered. */
175 struct complaint lbrac_complaint
=
176 {"bad block start address patched", 0, 0};
178 struct complaint string_table_offset_complaint
=
179 {"bad string table offset in symbol %d", 0, 0};
181 struct complaint unknown_symtype_complaint
=
182 {"unknown symbol type %s", 0, 0};
184 struct complaint unknown_symchar_complaint
=
185 {"unknown symbol descriptor `%c'", 0, 0};
187 struct complaint lbrac_rbrac_complaint
=
188 {"block start larger than block end", 0, 0};
190 struct complaint lbrac_unmatched_complaint
=
191 {"unmatched N_LBRAC before symtab pos %d", 0, 0};
193 struct complaint lbrac_mismatch_complaint
=
194 {"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0};
196 struct complaint repeated_header_complaint
=
197 {"\"repeated\" header file %s not previously seen, at symtab pos %d", 0, 0};
199 struct complaint unclaimed_bincl_complaint
=
200 {"N_BINCL %s not in entries for any file, at symtab pos %d", 0, 0};
202 /* find_text_range --- find start and end of loadable code sections
204 The find_text_range function finds the shortest address range that
205 encloses all sections containing executable code, and stores it in
206 objfile's text_addr and text_size members.
208 dbx_symfile_read will use this to finish off the partial symbol
209 table, in some cases. */
212 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
219 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
220 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
222 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
223 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
227 if (sec_start
< start
)
242 error ("Can't find any code sections in symbol file");
244 DBX_TEXT_ADDR (objfile
) = start
;
245 DBX_TEXT_SIZE (objfile
) = end
- start
;
250 /* During initial symbol readin, we need to have a structure to keep
251 track of which psymtabs have which bincls in them. This structure
252 is used during readin to setup the list of dependencies within each
253 partial symbol table. */
255 struct header_file_location
257 char *name
; /* Name of header file */
258 int instance
; /* See above */
259 struct partial_symtab
*pst
; /* Partial symtab that has the
260 BINCL/EINCL defs for this file */
263 /* The actual list and controling variables */
264 static struct header_file_location
*bincl_list
, *next_bincl
;
265 static int bincls_allocated
;
267 /* Local function prototypes */
269 extern void _initialize_dbxread (void);
271 static void process_now (struct objfile
*);
273 static void free_header_files (void);
275 static void init_header_files (void);
277 static void read_ofile_symtab (struct partial_symtab
*);
279 static void dbx_psymtab_to_symtab (struct partial_symtab
*);
281 static void dbx_psymtab_to_symtab_1 (struct partial_symtab
*);
283 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
285 static void read_dbx_symtab (struct objfile
*);
287 static void free_bincl_list (struct objfile
*);
289 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
291 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
293 static void init_bincl_list (int, struct objfile
*);
295 static char *dbx_next_symbol_text (struct objfile
*);
297 static void fill_symbuf (bfd
*);
299 static void dbx_symfile_init (struct objfile
*);
301 static void dbx_new_init (struct objfile
*);
303 static void dbx_symfile_read (struct objfile
*, int);
305 static void dbx_symfile_finish (struct objfile
*);
307 static void record_minimal_symbol (char *, CORE_ADDR
, int, struct objfile
*);
309 static void add_new_header_file (char *, int);
311 static void add_old_header_file (char *, int);
313 static void add_this_object_header_file (int);
315 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
317 struct partial_symbol
**,
318 struct partial_symbol
**);
320 /* Free up old header file tables */
323 free_header_files (void)
325 if (this_object_header_files
)
327 xfree (this_object_header_files
);
328 this_object_header_files
= NULL
;
330 n_allocated_this_object_header_files
= 0;
333 /* Allocate new header file tables */
336 init_header_files (void)
338 n_allocated_this_object_header_files
= 10;
339 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
342 /* Add header file number I for this object file
343 at the next successive FILENUM. */
346 add_this_object_header_file (int i
)
348 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
350 n_allocated_this_object_header_files
*= 2;
351 this_object_header_files
352 = (int *) xrealloc ((char *) this_object_header_files
,
353 n_allocated_this_object_header_files
* sizeof (int));
356 this_object_header_files
[n_this_object_header_files
++] = i
;
359 /* Add to this file an "old" header file, one already seen in
360 a previous object file. NAME is the header file's name.
361 INSTANCE is its instance code, to select among multiple
362 symbol tables for the same header file. */
365 add_old_header_file (char *name
, int instance
)
367 register struct header_file
*p
= HEADER_FILES (current_objfile
);
370 for (i
= 0; i
< N_HEADER_FILES (current_objfile
); i
++)
371 if (STREQ (p
[i
].name
, name
) && instance
== p
[i
].instance
)
373 add_this_object_header_file (i
);
376 complain (&repeated_header_complaint
, name
, symnum
);
379 /* Add to this file a "new" header file: definitions for its types follow.
380 NAME is the header file's name.
381 Most often this happens only once for each distinct header file,
382 but not necessarily. If it happens more than once, INSTANCE has
383 a different value each time, and references to the header file
384 use INSTANCE values to select among them.
386 dbx output contains "begin" and "end" markers for each new header file,
387 but at this level we just need to know which files there have been;
388 so we record the file when its "begin" is seen and ignore the "end". */
391 add_new_header_file (char *name
, int instance
)
394 register struct header_file
*hfile
;
396 /* Make sure there is room for one more header file. */
398 i
= N_ALLOCATED_HEADER_FILES (current_objfile
);
400 if (N_HEADER_FILES (current_objfile
) == i
)
404 N_ALLOCATED_HEADER_FILES (current_objfile
) = 10;
405 HEADER_FILES (current_objfile
) = (struct header_file
*)
406 xmalloc (10 * sizeof (struct header_file
));
411 N_ALLOCATED_HEADER_FILES (current_objfile
) = i
;
412 HEADER_FILES (current_objfile
) = (struct header_file
*)
413 xrealloc ((char *) HEADER_FILES (current_objfile
),
414 (i
* sizeof (struct header_file
)));
418 /* Create an entry for this header file. */
420 i
= N_HEADER_FILES (current_objfile
)++;
421 hfile
= HEADER_FILES (current_objfile
) + i
;
422 hfile
->name
= savestring (name
, strlen (name
));
423 hfile
->instance
= instance
;
426 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
427 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
429 add_this_object_header_file (i
);
433 static struct type
**
434 explicit_lookup_type (int real_filenum
, int index
)
436 register struct header_file
*f
= &HEADER_FILES (current_objfile
)[real_filenum
];
438 if (index
>= f
->length
)
441 f
->vector
= (struct type
**)
442 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
443 memset (&f
->vector
[f
->length
/ 2],
444 '\0', f
->length
* sizeof (struct type
*) / 2);
446 return &f
->vector
[index
];
451 record_minimal_symbol (char *name
, CORE_ADDR address
, int type
,
452 struct objfile
*objfile
)
454 enum minimal_symbol_type ms_type
;
456 asection
*bfd_section
;
462 section
= SECT_OFF_TEXT (objfile
);
463 bfd_section
= DBX_TEXT_SECTION (objfile
);
467 section
= SECT_OFF_DATA (objfile
);
468 bfd_section
= DBX_DATA_SECTION (objfile
);
472 section
= SECT_OFF_BSS (objfile
);
473 bfd_section
= DBX_BSS_SECTION (objfile
);
483 section
= SECT_OFF_DATA (objfile
);
484 bfd_section
= DBX_DATA_SECTION (objfile
);
487 /* I don't think this type actually exists; since a N_SETV is the result
488 of going over many .o files, it doesn't make sense to have one
490 ms_type
= mst_file_data
;
491 section
= SECT_OFF_DATA (objfile
);
492 bfd_section
= DBX_DATA_SECTION (objfile
);
499 ms_type
= mst_file_text
;
500 section
= SECT_OFF_TEXT (objfile
);
501 bfd_section
= DBX_TEXT_SECTION (objfile
);
504 ms_type
= mst_file_data
;
506 /* Check for __DYNAMIC, which is used by Sun shared libraries.
507 Record it as global even if it's local, not global, so
508 lookup_minimal_symbol can find it. We don't check symbol_leading_char
509 because for SunOS4 it always is '_'. */
510 if (name
[8] == 'C' && STREQ ("__DYNAMIC", name
))
513 /* Same with virtual function tables, both global and static. */
515 char *tempstring
= name
;
516 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
518 if (is_vtable_name (tempstring
))
521 section
= SECT_OFF_DATA (objfile
);
522 bfd_section
= DBX_DATA_SECTION (objfile
);
525 ms_type
= mst_file_bss
;
526 section
= SECT_OFF_BSS (objfile
);
527 bfd_section
= DBX_BSS_SECTION (objfile
);
530 ms_type
= mst_unknown
;
536 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
537 && address
< lowest_text_address
)
538 lowest_text_address
= address
;
540 prim_record_minimal_symbol_and_info
541 (name
, address
, ms_type
, NULL
, section
, bfd_section
, objfile
);
544 /* Scan and build partial symbols for a symbol file.
545 We have been initialized by a call to dbx_symfile_init, which
546 put all the relevant info into a "struct dbx_symfile_info",
547 hung off the objfile structure.
549 MAINLINE is true if we are reading the main symbol
550 table (as opposed to a shared lib or dynamically loaded file). */
553 dbx_symfile_read (struct objfile
*objfile
, int mainline
)
557 struct cleanup
*back_to
;
559 sym_bfd
= objfile
->obfd
;
561 /* .o and .nlm files are relocatables with text, data and bss segs based at
562 0. This flag disables special (Solaris stabs-in-elf only) fixups for
563 symbols with a value of 0. */
565 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
567 /* This is true for Solaris (and all other systems which put stabs
568 in sections, hopefully, since it would be silly to do things
569 differently from Solaris), and false for SunOS4 and other a.out
571 block_address_function_relative
=
572 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
573 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
574 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
575 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
576 || (0 == strncmp (bfd_get_target (sym_bfd
), "epoc-pe", 7))
577 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
579 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
581 perror_with_name (objfile
->name
);
583 /* If we are reinitializing, or if we have never loaded syms yet, init */
585 || objfile
->global_psymbols
.size
== 0
586 || objfile
->static_psymbols
.size
== 0)
587 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
589 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
590 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
592 free_pending_blocks ();
593 back_to
= make_cleanup (really_free_pendings
, 0);
595 init_minimal_symbol_collection ();
596 make_cleanup_discard_minimal_symbols ();
598 /* Read stabs data from executable file and define symbols. */
600 read_dbx_symtab (objfile
);
602 /* Add the dynamic symbols. */
604 read_dbx_dynamic_symtab (objfile
);
606 /* Install any minimal symbols that have been collected as the current
607 minimal symbols for this objfile. */
609 install_minimal_symbols (objfile
);
611 do_cleanups (back_to
);
614 /* Initialize anything that needs initializing when a completely new
615 symbol file is specified (not just adding some symbols from another
616 file, e.g. a shared library). */
619 dbx_new_init (struct objfile
*ignore
)
621 stabsread_new_init ();
622 buildsym_new_init ();
623 init_header_files ();
627 /* dbx_symfile_init ()
628 is the dbx-specific initialization routine for reading symbols.
629 It is passed a struct objfile which contains, among other things,
630 the BFD for the file whose symbols are being read, and a slot for a pointer
631 to "private data" which we fill with goodies.
633 We read the string table into malloc'd space and stash a pointer to it.
635 Since BFD doesn't know how to read debug symbols in a format-independent
636 way (and may never do so...), we have to do it ourselves. We will never
637 be called unless this is an a.out (or very similar) file.
638 FIXME, there should be a cleaner peephole into the BFD environment here. */
640 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
643 dbx_symfile_init (struct objfile
*objfile
)
646 bfd
*sym_bfd
= objfile
->obfd
;
647 char *name
= bfd_get_filename (sym_bfd
);
649 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
651 /* Allocate struct to keep track of the symfile */
652 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
653 xmmalloc (objfile
->md
, sizeof (struct dbx_symfile_info
));
654 memset ((PTR
) objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
656 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
657 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
658 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
660 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
661 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
662 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
664 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
666 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
668 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
670 error ("Can't find .text section in symbol file");
671 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
672 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
674 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
675 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
676 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
678 /* Read the string table and stash it away in the psymbol_obstack. It is
679 only needed as long as we need to expand psymbols into full symbols,
680 so when we blow away the psymbol the string table goes away as well.
681 Note that gdb used to use the results of attempting to malloc the
682 string table, based on the size it read, as a form of sanity check
683 for botched byte swapping, on the theory that a byte swapped string
684 table size would be so totally bogus that the malloc would fail. Now
685 that we put in on the psymbol_obstack, we can't do this since gdb gets
686 a fatal error (out of virtual memory) if the size is bogus. We can
687 however at least check to see if the size is less than the size of
688 the size field itself, or larger than the size of the entire file.
689 Note that all valid string tables have a size greater than zero, since
690 the bytes used to hold the size are included in the count. */
692 if (STRING_TABLE_OFFSET
== 0)
694 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
695 will never be zero, even when there is no string table. This
696 would appear to be a bug in bfd. */
697 DBX_STRINGTAB_SIZE (objfile
) = 0;
698 DBX_STRINGTAB (objfile
) = NULL
;
702 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
704 perror_with_name (name
);
706 memset ((PTR
) size_temp
, 0, sizeof (size_temp
));
707 val
= bfd_read ((PTR
) size_temp
, sizeof (size_temp
), 1, sym_bfd
);
710 perror_with_name (name
);
714 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
715 EOF if there is no string table, and attempting to read the size
716 from EOF will read zero bytes. */
717 DBX_STRINGTAB_SIZE (objfile
) = 0;
718 DBX_STRINGTAB (objfile
) = NULL
;
722 /* Read some data that would appear to be the string table size.
723 If there really is a string table, then it is probably the right
724 size. Byteswap if necessary and validate the size. Note that
725 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
726 random data that happened to be at STRING_TABLE_OFFSET, because
727 bfd can't tell us there is no string table, the sanity checks may
728 or may not catch this. */
729 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
731 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
732 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
733 error ("ridiculous string table size (%d bytes).",
734 DBX_STRINGTAB_SIZE (objfile
));
736 DBX_STRINGTAB (objfile
) =
737 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
738 DBX_STRINGTAB_SIZE (objfile
));
739 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
741 /* Now read in the string table in one big gulp. */
743 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
745 perror_with_name (name
);
746 val
= bfd_read (DBX_STRINGTAB (objfile
), DBX_STRINGTAB_SIZE (objfile
), 1,
748 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
749 perror_with_name (name
);
754 /* Perform any local cleanups required when we are done with a particular
755 objfile. I.E, we are in the process of discarding all symbol information
756 for an objfile, freeing up all memory held for it, and unlinking the
757 objfile struct from the global list of known objfiles. */
760 dbx_symfile_finish (struct objfile
*objfile
)
762 if (objfile
->sym_stab_info
!= NULL
)
764 if (HEADER_FILES (objfile
) != NULL
)
766 register int i
= N_HEADER_FILES (objfile
);
767 register struct header_file
*hfiles
= HEADER_FILES (objfile
);
771 xfree (hfiles
[i
].name
);
772 xfree (hfiles
[i
].vector
);
776 mfree (objfile
->md
, objfile
->sym_stab_info
);
778 free_header_files ();
782 /* Buffer for reading the symbol table entries. */
783 static struct external_nlist symbuf
[4096];
784 static int symbuf_idx
;
785 static int symbuf_end
;
787 /* cont_elem is used for continuing information in cfront.
788 It saves information about which types need to be fixed up and
789 completed after all the stabs are read. */
792 /* sym and stabstring for continuing information in cfront */
795 /* state dependencies (statics that must be preserved) */
799 int (*func
) (struct objfile
*, struct symbol
*, char *);
800 /* other state dependencies include:
801 (assumption is that these will not change since process_now FIXME!!)
808 static struct cont_elem
*cont_list
= 0;
809 static int cont_limit
= 0;
810 static int cont_count
= 0;
812 /* Arrange for function F to be called with arguments SYM and P later
813 in the stabs reading process. */
815 process_later (struct symbol
*sym
, char *p
,
816 int (*f
) (struct objfile
*, struct symbol
*, char *))
819 /* Allocate more space for the deferred list. */
820 if (cont_count
>= cont_limit
- 1)
822 cont_limit
+= 32; /* chunk size */
825 = (struct cont_elem
*) xrealloc (cont_list
,
827 * sizeof (struct cont_elem
)));
829 error ("Virtual memory exhausted\n");
832 /* Save state variables so we can process these stabs later. */
833 cont_list
[cont_count
].sym_idx
= symbuf_idx
;
834 cont_list
[cont_count
].sym_end
= symbuf_end
;
835 cont_list
[cont_count
].symnum
= symnum
;
836 cont_list
[cont_count
].sym
= sym
;
837 cont_list
[cont_count
].stabs
= p
;
838 cont_list
[cont_count
].func
= f
;
842 /* Call deferred funtions in CONT_LIST. */
845 process_now (struct objfile
*objfile
)
854 int (*func
) (struct objfile
*, struct symbol
*, char *);
856 /* Save the state of our caller, we'll want to restore it before
858 save_symbuf_idx
= symbuf_idx
;
859 save_symbuf_end
= symbuf_end
;
860 save_symnum
= symnum
;
862 /* Iterate over all the deferred stabs. */
863 for (i
= 0; i
< cont_count
; i
++)
865 /* Restore the state for this deferred stab. */
866 symbuf_idx
= cont_list
[i
].sym_idx
;
867 symbuf_end
= cont_list
[i
].sym_end
;
868 symnum
= cont_list
[i
].symnum
;
869 sym
= cont_list
[i
].sym
;
870 stabs
= cont_list
[i
].stabs
;
871 func
= cont_list
[i
].func
;
873 /* Call the function to handle this deferrd stab. */
874 err
= (*func
) (objfile
, sym
, stabs
);
876 error ("Internal error: unable to resolve stab.\n");
879 /* Restore our caller's state. */
880 symbuf_idx
= save_symbuf_idx
;
881 symbuf_end
= save_symbuf_end
;
882 symnum
= save_symnum
;
887 /* Name of last function encountered. Used in Solaris to approximate
888 object file boundaries. */
889 static char *last_function_name
;
891 /* The address in memory of the string table of the object file we are
892 reading (which might not be the "main" object file, but might be a
893 shared library or some other dynamically loaded thing). This is
894 set by read_dbx_symtab when building psymtabs, and by
895 read_ofile_symtab when building symtabs, and is used only by
896 next_symbol_text. FIXME: If that is true, we don't need it when
897 building psymtabs, right? */
898 static char *stringtab_global
;
900 /* These variables are used to control fill_symbuf when the stabs
901 symbols are not contiguous (as may be the case when a COFF file is
902 linked using --split-by-reloc). */
903 static struct stab_section_list
*symbuf_sections
;
904 static unsigned int symbuf_left
;
905 static unsigned int symbuf_read
;
907 /* Refill the symbol table input buffer
908 and set the variables that control fetching entries from it.
909 Reports an error if no data available.
910 This function can read past the end of the symbol table
911 (into the string table) but this does no harm. */
914 fill_symbuf (bfd
*sym_bfd
)
919 if (symbuf_sections
== NULL
)
920 count
= sizeof (symbuf
);
923 if (symbuf_left
<= 0)
925 file_ptr filepos
= symbuf_sections
->section
->filepos
;
926 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
927 perror_with_name (bfd_get_filename (sym_bfd
));
928 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
929 symbol_table_offset
= filepos
- symbuf_read
;
930 symbuf_sections
= symbuf_sections
->next
;
934 if (count
> sizeof (symbuf
))
935 count
= sizeof (symbuf
);
938 nbytes
= bfd_read ((PTR
) symbuf
, count
, 1, sym_bfd
);
940 perror_with_name (bfd_get_filename (sym_bfd
));
941 else if (nbytes
== 0)
942 error ("Premature end of file reading symbol table");
943 symbuf_end
= nbytes
/ symbol_size
;
945 symbuf_left
-= nbytes
;
946 symbuf_read
+= nbytes
;
949 #define SWAP_SYMBOL(symp, abfd) \
951 (symp)->n_strx = bfd_h_get_32(abfd, \
952 (unsigned char *)&(symp)->n_strx); \
953 (symp)->n_desc = bfd_h_get_16 (abfd, \
954 (unsigned char *)&(symp)->n_desc); \
955 (symp)->n_value = bfd_h_get_32 (abfd, \
956 (unsigned char *)&(symp)->n_value); \
959 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
961 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
962 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
963 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
964 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
967 /* Invariant: The symbol pointed to by symbuf_idx is the first one
968 that hasn't been swapped. Swap the symbol at the same time
969 that symbuf_idx is incremented. */
971 /* dbx allows the text of a symbol name to be continued into the
972 next symbol name! When such a continuation is encountered
973 (a \ at the end of the text of a name)
974 call this function to get the continuation. */
977 dbx_next_symbol_text (struct objfile
*objfile
)
979 struct internal_nlist nlist
;
981 if (symbuf_idx
== symbuf_end
)
982 fill_symbuf (symfile_bfd
);
985 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
986 OBJSTAT (objfile
, n_stabs
++);
990 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
993 /* Initialize the list of bincls to contain none and have some
997 init_bincl_list (int number
, struct objfile
*objfile
)
999 bincls_allocated
= number
;
1000 next_bincl
= bincl_list
= (struct header_file_location
*)
1001 xmmalloc (objfile
->md
, bincls_allocated
* sizeof (struct header_file_location
));
1004 /* Add a bincl to the list. */
1007 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
1009 if (next_bincl
>= bincl_list
+ bincls_allocated
)
1011 int offset
= next_bincl
- bincl_list
;
1012 bincls_allocated
*= 2;
1013 bincl_list
= (struct header_file_location
*)
1014 xmrealloc (pst
->objfile
->md
, (char *) bincl_list
,
1015 bincls_allocated
* sizeof (struct header_file_location
));
1016 next_bincl
= bincl_list
+ offset
;
1018 next_bincl
->pst
= pst
;
1019 next_bincl
->instance
= instance
;
1020 next_bincl
++->name
= name
;
1023 /* Given a name, value pair, find the corresponding
1024 bincl in the list. Return the partial symtab associated
1025 with that header_file_location. */
1027 static struct partial_symtab
*
1028 find_corresponding_bincl_psymtab (char *name
, int instance
)
1030 struct header_file_location
*bincl
;
1032 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
1033 if (bincl
->instance
== instance
1034 && STREQ (name
, bincl
->name
))
1037 complain (&repeated_header_complaint
, name
, symnum
);
1038 return (struct partial_symtab
*) 0;
1041 /* Free the storage allocated for the bincl list. */
1044 free_bincl_list (struct objfile
*objfile
)
1046 mfree (objfile
->md
, (PTR
) bincl_list
);
1047 bincls_allocated
= 0;
1051 do_free_bincl_list_cleanup (void *objfile
)
1053 free_bincl_list (objfile
);
1056 static struct cleanup
*
1057 make_cleanup_free_bincl_list (struct objfile
*objfile
)
1059 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
1062 /* Scan a SunOs dynamic symbol table for symbols of interest and
1063 add them to the minimal symbol table. */
1066 read_dbx_dynamic_symtab (struct objfile
*objfile
)
1068 bfd
*abfd
= objfile
->obfd
;
1069 struct cleanup
*back_to
;
1079 CORE_ADDR sym_value
;
1082 /* Check that the symbol file has dynamic symbols that we know about.
1083 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1084 on a sun4 host (and vice versa) and bfd is not configured
1085 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1086 so we ignore the dynamic symbols in this case. */
1087 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1088 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1089 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1092 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1093 if (dynsym_size
< 0)
1096 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1097 back_to
= make_cleanup (xfree
, dynsyms
);
1099 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1100 if (dynsym_count
< 0)
1102 do_cleanups (back_to
);
1106 /* Enter dynamic symbols into the minimal symbol table
1107 if this is a stripped executable. */
1108 if (bfd_get_symcount (abfd
) <= 0)
1111 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1113 asymbol
*sym
= *symptr
;
1117 sec
= bfd_get_section (sym
);
1119 /* BFD symbols are section relative. */
1120 sym_value
= sym
->value
+ sec
->vma
;
1122 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1124 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1127 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1129 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1132 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1134 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS (objfile
));
1140 if (sym
->flags
& BSF_GLOBAL
)
1143 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1148 /* Symbols from shared libraries have a dynamic relocation entry
1149 that points to the associated slot in the procedure linkage table.
1150 We make a mininal symbol table entry with type mst_solib_trampoline
1151 at the address in the procedure linkage table. */
1152 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1153 if (dynrel_size
< 0)
1155 do_cleanups (back_to
);
1159 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1160 make_cleanup (xfree
, dynrels
);
1162 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1163 if (dynrel_count
< 0)
1165 do_cleanups (back_to
);
1169 for (counter
= 0, relptr
= dynrels
;
1170 counter
< dynrel_count
;
1171 counter
++, relptr
++)
1173 arelent
*rel
= *relptr
;
1175 rel
->address
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1177 switch (bfd_get_arch (abfd
))
1179 case bfd_arch_sparc
:
1180 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1184 /* `16' is the type BFD produces for a jump table relocation. */
1185 if (rel
->howto
->type
!= 16)
1188 /* Adjust address in the jump table to point to
1189 the start of the bsr instruction. */
1196 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1197 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1201 do_cleanups (back_to
);
1204 /* Setup partial_symtab's describing each source file for which
1205 debugging information is available. */
1208 read_dbx_symtab (struct objfile
*objfile
)
1210 register struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1211 struct internal_nlist nlist
;
1212 CORE_ADDR text_addr
;
1215 register char *namestring
;
1217 int past_first_source_file
= 0;
1218 CORE_ADDR last_o_file_start
= 0;
1219 CORE_ADDR last_function_start
= 0;
1220 struct cleanup
*back_to
;
1222 int textlow_not_set
;
1224 /* Current partial symtab */
1225 struct partial_symtab
*pst
;
1227 /* List of current psymtab's include files */
1228 char **psymtab_include_list
;
1229 int includes_allocated
;
1232 /* Index within current psymtab dependency list */
1233 struct partial_symtab
**dependency_list
;
1234 int dependencies_used
, dependencies_allocated
;
1236 text_addr
= DBX_TEXT_ADDR (objfile
);
1237 text_size
= DBX_TEXT_SIZE (objfile
);
1239 /* FIXME. We probably want to change stringtab_global rather than add this
1240 while processing every symbol entry. FIXME. */
1241 file_string_table_offset
= 0;
1242 next_file_string_table_offset
= 0;
1244 stringtab_global
= DBX_STRINGTAB (objfile
);
1246 pst
= (struct partial_symtab
*) 0;
1248 includes_allocated
= 30;
1250 psymtab_include_list
= (char **) alloca (includes_allocated
*
1253 dependencies_allocated
= 30;
1254 dependencies_used
= 0;
1256 (struct partial_symtab
**) alloca (dependencies_allocated
*
1257 sizeof (struct partial_symtab
*));
1259 /* Init bincl list */
1260 init_bincl_list (20, objfile
);
1261 back_to
= make_cleanup_free_bincl_list (objfile
);
1263 last_source_file
= NULL
;
1265 lowest_text_address
= (CORE_ADDR
) -1;
1267 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1268 abfd
= objfile
->obfd
;
1269 symbuf_end
= symbuf_idx
= 0;
1270 next_symbol_text_func
= dbx_next_symbol_text
;
1271 textlow_not_set
= 1;
1272 has_line_numbers
= 0;
1274 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1276 /* Get the symbol for this run and pull out some info */
1277 QUIT
; /* allow this to be interruptable */
1278 if (symbuf_idx
== symbuf_end
)
1280 bufp
= &symbuf
[symbuf_idx
++];
1283 * Special case to speed up readin.
1285 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1287 has_line_numbers
= 1;
1291 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1292 OBJSTAT (objfile
, n_stabs
++);
1294 /* Ok. There is a lot of code duplicated in the rest of this
1295 switch statement (for efficiency reasons). Since I don't
1296 like duplicating code, I will do my penance here, and
1297 describe the code which is duplicated:
1299 *) The assignment to namestring.
1300 *) The call to strchr.
1301 *) The addition of a partial symbol the the two partial
1302 symbol lists. This last is a large section of code, so
1303 I've imbedded it in the following macro.
1306 /* Set namestring based on nlist. If the string table index is invalid,
1307 give a fake name, and print a single error message per symbol file read,
1308 rather than abort the symbol reading or flood the user with messages. */
1310 /*FIXME: Too many adds and indirections in here for the inner loop. */
1311 #define SET_NAMESTRING()\
1312 if (((unsigned)CUR_SYMBOL_STRX + file_string_table_offset) >= \
1313 DBX_STRINGTAB_SIZE (objfile)) { \
1314 complain (&string_table_offset_complaint, symnum); \
1315 namestring = "<bad string table offset>"; \
1317 namestring = CUR_SYMBOL_STRX + file_string_table_offset + \
1318 DBX_STRINGTAB (objfile)
1320 #define CUR_SYMBOL_TYPE nlist.n_type
1321 #define CUR_SYMBOL_VALUE nlist.n_value
1322 #define CUR_SYMBOL_STRX nlist.n_strx
1323 #define DBXREAD_ONLY
1324 #define START_PSYMTAB(ofile,fname,low,symoff,global_syms,static_syms)\
1325 start_psymtab(ofile, fname, low, symoff, global_syms, static_syms)
1326 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\
1327 end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)
1329 #include "partial-stab.h"
1332 /* If there's stuff to be cleaned up, clean it up. */
1333 if (DBX_SYMCOUNT (objfile
) > 0 /* We have some syms */
1334 /*FIXME, does this have a bug at start address 0? */
1335 && last_o_file_start
1336 && objfile
->ei
.entry_point
< nlist
.n_value
1337 && objfile
->ei
.entry_point
>= last_o_file_start
)
1339 objfile
->ei
.entry_file_lowpc
= last_o_file_start
;
1340 objfile
->ei
.entry_file_highpc
= nlist
.n_value
;
1345 /* Don't set pst->texthigh lower than it already is. */
1346 CORE_ADDR text_end
=
1347 (lowest_text_address
== (CORE_ADDR
) -1
1348 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)))
1349 : lowest_text_address
)
1352 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1353 symnum
* symbol_size
,
1354 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
1355 dependency_list
, dependencies_used
, textlow_not_set
);
1358 do_cleanups (back_to
);
1361 /* Allocate and partially fill a partial symtab. It will be
1362 completely filled at the end of the symbol list.
1364 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1365 is the address relative to which its symbols are (incremental) or 0
1369 static struct partial_symtab
*
1370 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
1371 int ldsymoff
, struct partial_symbol
**global_syms
,
1372 struct partial_symbol
**static_syms
)
1374 struct partial_symtab
*result
=
1375 start_psymtab_common (objfile
, objfile
->section_offsets
,
1376 filename
, textlow
, global_syms
, static_syms
);
1378 result
->read_symtab_private
= (char *)
1379 obstack_alloc (&objfile
->psymbol_obstack
, sizeof (struct symloc
));
1380 LDSYMOFF (result
) = ldsymoff
;
1381 result
->read_symtab
= dbx_psymtab_to_symtab
;
1382 SYMBOL_SIZE (result
) = symbol_size
;
1383 SYMBOL_OFFSET (result
) = symbol_table_offset
;
1384 STRING_OFFSET (result
) = string_table_offset
;
1385 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
1387 /* If we're handling an ELF file, drag some section-relocation info
1388 for this source file out of the ELF symbol table, to compensate for
1389 Sun brain death. This replaces the section_offsets in this psymtab,
1391 elfstab_offset_sections (objfile
, result
);
1393 /* Deduce the source language from the filename for this psymtab. */
1394 psymtab_language
= deduce_language_from_filename (filename
);
1399 /* Close off the current usage of PST.
1400 Returns PST or NULL if the partial symtab was empty and thrown away.
1402 FIXME: List variables and peculiarities of same. */
1404 struct partial_symtab
*
1405 end_psymtab (struct partial_symtab
*pst
, char **include_list
, int num_includes
,
1406 int capping_symbol_offset
, CORE_ADDR capping_text
,
1407 struct partial_symtab
**dependency_list
, int number_dependencies
,
1408 int textlow_not_set
)
1411 struct objfile
*objfile
= pst
->objfile
;
1413 if (capping_symbol_offset
!= -1)
1414 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
1415 pst
->texthigh
= capping_text
;
1417 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1418 /* Under Solaris, the N_SO symbols always have a value of 0,
1419 instead of the usual address of the .o file. Therefore,
1420 we have to do some tricks to fill in texthigh and textlow.
1421 The first trick is in partial-stab.h: if we see a static
1422 or global function, and the textlow for the current pst
1423 is not set (ie: textlow_not_set), then we use that function's
1424 address for the textlow of the pst. */
1426 /* Now, to fill in texthigh, we remember the last function seen
1427 in the .o file (also in partial-stab.h). Also, there's a hack in
1428 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1429 to here via the misc_info field. Therefore, we can fill in
1430 a reliable texthigh by taking the address plus size of the
1431 last function in the file. */
1433 if (pst
->texthigh
== 0 && last_function_name
)
1437 struct minimal_symbol
*minsym
;
1439 p
= strchr (last_function_name
, ':');
1441 p
= last_function_name
;
1442 n
= p
- last_function_name
;
1444 strncpy (p
, last_function_name
, n
);
1447 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
1450 /* Sun Fortran appends an underscore to the minimal symbol name,
1451 try again with an appended underscore if the minimal symbol
1455 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
1459 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
1461 last_function_name
= NULL
;
1464 /* this test will be true if the last .o file is only data */
1465 if (textlow_not_set
)
1466 pst
->textlow
= pst
->texthigh
;
1469 struct partial_symtab
*p1
;
1471 /* If we know our own starting text address, then walk through all other
1472 psymtabs for this objfile, and if any didn't know their ending text
1473 address, set it to our starting address. Take care to not set our
1474 own ending address to our starting address, nor to set addresses on
1475 `dependency' files that have both textlow and texthigh zero. */
1477 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
1479 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
1481 p1
->texthigh
= pst
->textlow
;
1482 /* if this file has only data, then make textlow match texthigh */
1483 if (p1
->textlow
== 0)
1484 p1
->textlow
= p1
->texthigh
;
1489 /* End of kludge for patching Solaris textlow and texthigh. */
1490 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
1492 pst
->n_global_syms
=
1493 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1494 pst
->n_static_syms
=
1495 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1497 pst
->number_of_dependencies
= number_dependencies
;
1498 if (number_dependencies
)
1500 pst
->dependencies
= (struct partial_symtab
**)
1501 obstack_alloc (&objfile
->psymbol_obstack
,
1502 number_dependencies
* sizeof (struct partial_symtab
*));
1503 memcpy (pst
->dependencies
, dependency_list
,
1504 number_dependencies
* sizeof (struct partial_symtab
*));
1507 pst
->dependencies
= 0;
1509 for (i
= 0; i
< num_includes
; i
++)
1511 struct partial_symtab
*subpst
=
1512 allocate_psymtab (include_list
[i
], objfile
);
1514 /* Copy the sesction_offsets array from the main psymtab. */
1515 subpst
->section_offsets
= pst
->section_offsets
;
1516 subpst
->read_symtab_private
=
1517 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
1518 sizeof (struct symloc
));
1522 subpst
->texthigh
= 0;
1524 /* We could save slight bits of space by only making one of these,
1525 shared by the entire set of include files. FIXME-someday. */
1526 subpst
->dependencies
= (struct partial_symtab
**)
1527 obstack_alloc (&objfile
->psymbol_obstack
,
1528 sizeof (struct partial_symtab
*));
1529 subpst
->dependencies
[0] = pst
;
1530 subpst
->number_of_dependencies
= 1;
1532 subpst
->globals_offset
=
1533 subpst
->n_global_syms
=
1534 subpst
->statics_offset
=
1535 subpst
->n_static_syms
= 0;
1539 subpst
->read_symtab
= pst
->read_symtab
;
1542 sort_pst_symbols (pst
);
1544 /* If there is already a psymtab or symtab for a file of this name, remove it.
1545 (If there is a symtab, more drastic things also happen.)
1546 This happens in VxWorks. */
1547 free_named_symtabs (pst
->filename
);
1549 if (num_includes
== 0
1550 && number_dependencies
== 0
1551 && pst
->n_global_syms
== 0
1552 && pst
->n_static_syms
== 0
1553 && has_line_numbers
== 0)
1555 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1556 it is on the obstack, but we can forget to chain it on the list. */
1557 /* Empty psymtabs happen as a result of header files which don't have
1558 any symbols in them. There can be a lot of them. But this check
1559 is wrong, in that a psymtab with N_SLINE entries but nothing else
1560 is not empty, but we don't realize that. Fixing that without slowing
1561 things down might be tricky. */
1563 discard_psymtab (pst
);
1565 /* Indicate that psymtab was thrown away. */
1566 pst
= (struct partial_symtab
*) NULL
;
1572 dbx_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
1574 struct cleanup
*old_chain
;
1582 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1587 /* Read in all partial symtabs on which this one is dependent */
1588 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1589 if (!pst
->dependencies
[i
]->readin
)
1591 /* Inform about additional files that need to be read in. */
1594 fputs_filtered (" ", gdb_stdout
);
1596 fputs_filtered ("and ", gdb_stdout
);
1598 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1599 wrap_here (""); /* Flush output */
1600 gdb_flush (gdb_stdout
);
1602 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1605 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy */
1607 /* Init stuff necessary for reading in symbols */
1610 old_chain
= make_cleanup (really_free_pendings
, 0);
1611 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
1612 symbol_size
= SYMBOL_SIZE (pst
);
1614 /* Read in this file's symbols */
1615 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
1616 read_ofile_symtab (pst
);
1617 sort_symtab_syms (pst
->symtab
);
1619 do_cleanups (old_chain
);
1625 /* Read in all of the symbols for a given psymtab for real.
1626 Be verbose about it if the user wants that. */
1629 dbx_psymtab_to_symtab (struct partial_symtab
*pst
)
1638 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1643 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
1645 /* Print the message now, before reading the string table,
1646 to avoid disconcerting pauses. */
1649 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1650 gdb_flush (gdb_stdout
);
1653 sym_bfd
= pst
->objfile
->obfd
;
1655 next_symbol_text_func
= dbx_next_symbol_text
;
1657 dbx_psymtab_to_symtab_1 (pst
);
1659 /* Match with global symbols. This only needs to be done once,
1660 after all of the symtabs and dependencies have been read in. */
1661 scan_file_globals (pst
->objfile
);
1663 /* Finish up the debug error message. */
1665 printf_filtered ("done.\n");
1669 /* Read in a defined section of a specific object file's symbols. */
1672 read_ofile_symtab (struct partial_symtab
*pst
)
1674 register char *namestring
;
1675 register struct external_nlist
*bufp
;
1676 struct internal_nlist nlist
;
1678 unsigned max_symnum
;
1680 struct objfile
*objfile
;
1681 int sym_offset
; /* Offset to start of symbols to read */
1682 int sym_size
; /* Size of symbols to read */
1683 CORE_ADDR text_offset
; /* Start of text segment for symbols */
1684 int text_size
; /* Size of text segment for symbols */
1685 struct section_offsets
*section_offsets
;
1687 objfile
= pst
->objfile
;
1688 sym_offset
= LDSYMOFF (pst
);
1689 sym_size
= LDSYMLEN (pst
);
1690 text_offset
= pst
->textlow
;
1691 text_size
= pst
->texthigh
- pst
->textlow
;
1692 /* This cannot be simply objfile->section_offsets because of
1693 elfstab_offset_sections() which initializes the psymtab section
1694 offsets information in a special way, and that is different from
1695 objfile->section_offsets. */
1696 section_offsets
= pst
->section_offsets
;
1698 current_objfile
= objfile
;
1699 subfile_stack
= NULL
;
1701 stringtab_global
= DBX_STRINGTAB (objfile
);
1702 last_source_file
= NULL
;
1704 abfd
= objfile
->obfd
;
1705 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
1706 symbuf_end
= symbuf_idx
= 0;
1708 /* It is necessary to actually read one symbol *before* the start
1709 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1710 occurs before the N_SO symbol.
1712 Detecting this in read_dbx_symtab
1713 would slow down initial readin, so we look for it here instead. */
1714 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
1716 bfd_seek (symfile_bfd
, sym_offset
- symbol_size
, SEEK_CUR
);
1718 bufp
= &symbuf
[symbuf_idx
++];
1719 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1720 OBJSTAT (objfile
, n_stabs
++);
1724 processing_gcc_compilation
= 0;
1725 if (nlist
.n_type
== N_TEXT
)
1727 const char *tempstring
= namestring
;
1729 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1730 processing_gcc_compilation
= 1;
1731 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1732 processing_gcc_compilation
= 2;
1733 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
1735 if (STREQN (tempstring
, "__gnu_compiled", 14))
1736 processing_gcc_compilation
= 2;
1739 /* Try to select a C++ demangling based on the compilation unit
1743 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
1744 know whether it will use the old style or v3 mangling. */
1745 if (processing_gcc_compilation
)
1747 if (AUTO_DEMANGLING
)
1749 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1756 /* The N_SO starting this symtab is the first symbol, so we
1757 better not check the symbol before it. I'm not this can
1758 happen, but it doesn't hurt to check for it. */
1759 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
1760 processing_gcc_compilation
= 0;
1763 if (symbuf_idx
== symbuf_end
)
1765 bufp
= &symbuf
[symbuf_idx
];
1766 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
1767 error ("First symbol in segment of executable not a source symbol");
1769 max_symnum
= sym_size
/ symbol_size
;
1772 symnum
< max_symnum
;
1775 QUIT
; /* Allow this to be interruptable */
1776 if (symbuf_idx
== symbuf_end
)
1778 bufp
= &symbuf
[symbuf_idx
++];
1779 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1780 OBJSTAT (objfile
, n_stabs
++);
1782 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
1788 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
1789 namestring
, section_offsets
, objfile
);
1791 /* We skip checking for a new .o or -l file; that should never
1792 happen in this routine. */
1793 else if (type
== N_TEXT
)
1795 /* I don't think this code will ever be executed, because
1796 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1797 the N_SO symbol which starts this source file.
1798 However, there is no reason not to accept
1799 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1801 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1802 processing_gcc_compilation
= 1;
1803 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1804 processing_gcc_compilation
= 2;
1807 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
1808 know whether it will use the old style or v3 mangling. */
1809 if (AUTO_DEMANGLING
)
1811 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1815 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
1816 || type
== (unsigned char) N_NBTEXT
1819 /* Global symbol: see if we came across a dbx defintion for
1820 a corresponding symbol. If so, store the value. Remove
1821 syms from the chain when their values are stored, but
1822 search the whole chain, as there may be several syms from
1823 different files with the same name. */
1824 /* This is probably not true. Since the files will be read
1825 in one at a time, each reference to a global symbol will
1826 be satisfied in each file as it appears. So we skip this
1832 current_objfile
= NULL
;
1834 /* In a Solaris elf file, this variable, which comes from the
1835 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1836 which comes from pst->textlow is correct. */
1837 if (last_source_start_addr
== 0)
1838 last_source_start_addr
= text_offset
;
1840 /* In reordered executables last_source_start_addr may not be the
1841 lower bound for this symtab, instead use text_offset which comes
1842 from pst->textlow which is correct. */
1843 if (last_source_start_addr
> text_offset
)
1844 last_source_start_addr
= text_offset
;
1846 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
, SECT_OFF_TEXT (objfile
));
1848 /* Process items which we had to "process_later" due to dependencies
1850 process_now (objfile
);
1856 /* This handles a single symbol from the symbol-file, building symbols
1857 into a GDB symtab. It takes these arguments and an implicit argument.
1859 TYPE is the type field of the ".stab" symbol entry.
1860 DESC is the desc field of the ".stab" entry.
1861 VALU is the value field of the ".stab" entry.
1862 NAME is the symbol name, in our address space.
1863 SECTION_OFFSETS is a set of amounts by which the sections of this object
1864 file were relocated when it was loaded into memory.
1865 Note that these section_offsets are not the
1866 objfile->section_offsets but the pst->section_offsets.
1867 All symbols that refer
1868 to memory locations need to be offset by these amounts.
1869 OBJFILE is the object file from which we are reading symbols.
1870 It is used in end_symtab. */
1873 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
1874 struct section_offsets
*section_offsets
,
1875 struct objfile
*objfile
)
1877 #ifdef SUN_FIXED_LBRAC_BUG
1878 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
1879 to correct the address of N_LBRAC's. If it is not defined, then
1880 we never need to correct the addresses. */
1882 /* This records the last pc address we've seen. We depend on there being
1883 an SLINE or FUN or SO before the first LBRAC, since the variable does
1884 not get reset in between reads of different symbol files. */
1885 static CORE_ADDR last_pc_address
;
1888 register struct context_stack
*new;
1889 /* This remembers the address of the start of a function. It is used
1890 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
1891 relative to the current function's start address. On systems
1892 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
1893 used to relocate these symbol types rather than SECTION_OFFSETS. */
1894 static CORE_ADDR function_start_offset
;
1896 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
1897 file. Used to detect the SunPRO solaris compiler. */
1898 static int n_opt_found
;
1900 /* The stab type used for the definition of the last function.
1901 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1902 static int function_stab_type
= 0;
1904 if (!block_address_function_relative
)
1905 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
1906 function start address, so just use the text offset. */
1907 function_start_offset
= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
1909 /* Something is wrong if we see real data before
1910 seeing a source file name. */
1912 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
1914 /* Ignore any symbols which appear before an N_SO symbol.
1915 Currently no one puts symbols there, but we should deal
1916 gracefully with the case. A complain()t might be in order,
1917 but this should not be an error (). */
1926 if (*name
== '\000')
1928 /* This N_FUN marks the end of a function. This closes off the
1930 within_function
= 0;
1931 new = pop_context ();
1933 /* Make a block for the local symbols within. */
1934 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1935 new->start_addr
, new->start_addr
+ valu
,
1938 /* May be switching to an assembler file which may not be using
1939 block relative stabs, so reset the offset. */
1940 if (block_address_function_relative
)
1941 function_start_offset
= 0;
1946 /* Relocate for dynamic loading */
1947 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
1948 #ifdef SMASH_TEXT_ADDRESS
1949 SMASH_TEXT_ADDRESS (valu
);
1951 goto define_a_symbol
;
1954 /* This "symbol" just indicates the start of an inner lexical
1955 context within a function. */
1957 /* Ignore extra outermost context from SunPRO cc and acc. */
1958 if (n_opt_found
&& desc
== 1)
1961 if (block_address_function_relative
)
1962 /* Relocate for Sun ELF acc fn-relative syms. */
1963 valu
+= function_start_offset
;
1965 /* On most machines, the block addresses are relative to the
1966 N_SO, the linker did not relocate them (sigh). */
1967 valu
+= last_source_start_addr
;
1969 #ifdef SUN_FIXED_LBRAC_BUG
1970 if (!SUN_FIXED_LBRAC_BUG
&& valu
< last_pc_address
)
1972 /* Patch current LBRAC pc value to match last handy pc value */
1973 complain (&lbrac_complaint
);
1974 valu
= last_pc_address
;
1977 new = push_context (desc
, valu
);
1981 /* This "symbol" just indicates the end of an inner lexical
1982 context that was started with N_LBRAC. */
1984 /* Ignore extra outermost context from SunPRO cc and acc. */
1985 if (n_opt_found
&& desc
== 1)
1988 if (block_address_function_relative
)
1989 /* Relocate for Sun ELF acc fn-relative syms. */
1990 valu
+= function_start_offset
;
1992 /* On most machines, the block addresses are relative to the
1993 N_SO, the linker did not relocate them (sigh). */
1994 valu
+= last_source_start_addr
;
1996 new = pop_context ();
1997 if (desc
!= new->depth
)
1998 complain (&lbrac_mismatch_complaint
, symnum
);
2000 /* Some compilers put the variable decls inside of an
2001 LBRAC/RBRAC block. This macro should be nonzero if this
2002 is true. DESC is N_DESC from the N_RBRAC symbol.
2003 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
2004 or the GCC2_COMPILED_SYMBOL. */
2005 #if !defined (VARIABLES_INSIDE_BLOCK)
2006 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2009 /* Can only use new->locals as local symbols here if we're in
2010 gcc or on a machine that puts them before the lbrack. */
2011 if (!VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2012 local_symbols
= new->locals
;
2014 if (context_stack_depth
2015 > !VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2017 /* This is not the outermost LBRAC...RBRAC pair in the function,
2018 its local symbols preceded it, and are the ones just recovered
2019 from the context stack. Define the block for them (but don't
2020 bother if the block contains no symbols. Should we complain
2021 on blocks without symbols? I can't think of any useful purpose
2023 if (local_symbols
!= NULL
)
2025 /* Muzzle a compiler bug that makes end < start. (which
2026 compilers? Is this ever harmful?). */
2027 if (new->start_addr
> valu
)
2029 complain (&lbrac_rbrac_complaint
);
2030 new->start_addr
= valu
;
2032 /* Make a block for the local symbols within. */
2033 finish_block (0, &local_symbols
, new->old_blocks
,
2034 new->start_addr
, valu
, objfile
);
2039 /* This is the outermost LBRAC...RBRAC pair. There is no
2040 need to do anything; leave the symbols that preceded it
2041 to be attached to the function's own block. We need to
2042 indicate that we just moved outside of the function. */
2043 within_function
= 0;
2046 if (VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2047 /* Now pop locals of block just finished. */
2048 local_symbols
= new->locals
;
2053 /* This kind of symbol indicates the start of an object file. */
2054 /* Relocate for dynamic loading */
2055 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2059 /* This type of symbol indicates the start of data
2060 for one source file.
2061 Finish the symbol table of the previous source file
2062 (if any) and start accumulating a new symbol table. */
2063 /* Relocate for dynamic loading */
2064 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2068 #ifdef SUN_FIXED_LBRAC_BUG
2069 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2072 #ifdef PCC_SOL_BROKEN
2073 /* pcc bug, occasionally puts out SO for SOL. */
2074 if (context_stack_depth
> 0)
2076 start_subfile (name
, NULL
);
2080 if (last_source_file
)
2082 /* Check if previous symbol was also an N_SO (with some
2083 sanity checks). If so, that one was actually the directory
2084 name, and the current one is the real file name.
2086 if (previous_stab_code
== (unsigned char) N_SO
)
2088 patch_subfile_names (current_subfile
, name
);
2089 break; /* Ignore repeated SOs */
2091 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2095 /* Null name means this just marks the end of text for this .o file.
2096 Don't start a new symtab in this case. */
2097 if (*name
== '\000')
2100 if (block_address_function_relative
)
2101 function_start_offset
= 0;
2104 start_symtab (name
, NULL
, valu
);
2105 record_debugformat ("stabs");
2109 /* This type of symbol indicates the start of data for
2110 a sub-source-file, one whose contents were copied or
2111 included in the compilation of the main source file
2112 (whose name was given in the N_SO symbol.) */
2113 /* Relocate for dynamic loading */
2114 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2115 start_subfile (name
, current_subfile
->dirname
);
2120 add_new_header_file (name
, valu
);
2121 start_subfile (name
, current_subfile
->dirname
);
2125 start_subfile (pop_subfile (), current_subfile
->dirname
);
2129 add_old_header_file (name
, valu
);
2133 /* This type of "symbol" really just records
2134 one line-number -- core-address correspondence.
2135 Enter it in the line list for this symbol table. */
2137 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
2138 valu
+= function_start_offset
;
2140 #ifdef SUN_FIXED_LBRAC_BUG
2141 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2143 record_line (current_subfile
, desc
, valu
);
2147 common_block_start (name
, objfile
);
2151 common_block_end (objfile
);
2154 /* The following symbol types need to have the appropriate offset added
2155 to their value; then we process symbol definitions in the name. */
2157 case N_STSYM
: /* Static symbol in data seg */
2158 case N_LCSYM
: /* Static symbol in BSS seg */
2159 case N_ROSYM
: /* Static symbol in Read-only data seg */
2160 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2161 Solaris2's stabs-in-elf makes *most* symbols relative
2162 but leaves a few absolute (at least for Solaris 2.1 and version
2163 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
2164 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
2165 .stab "foo:V...",N_STSYM is relative (section base subtracted).
2166 This leaves us no choice but to search for the 'S' or 'V'...
2167 (or pass the whole section_offsets stuff down ONE MORE function
2168 call level, which we really don't want to do). */
2172 /* .o files and NLMs have non-zero text seg offsets, but don't need
2173 their static syms offset in this fashion. XXX - This is really a
2174 crock that should be fixed in the solib handling code so that I
2175 don't have to work around it here. */
2177 if (!symfile_relocatable
)
2179 p
= strchr (name
, ':');
2180 if (p
!= 0 && p
[1] == 'S')
2182 /* The linker relocated it. We don't want to add an
2183 elfstab_offset_sections-type offset, but we *do* want
2184 to add whatever solib.c passed to symbol_file_add as
2185 addr (this is known to affect SunOS4, and I suspect ELF
2186 too). Since elfstab_offset_sections currently does not
2187 muck with the text offset (there is no Ttext.text
2188 symbol), we can get addr from the text offset. If
2189 elfstab_offset_sections ever starts dealing with the
2190 text offset, and we still need to do this, we need to
2191 invent a SECT_OFF_ADDR_KLUDGE or something. */
2192 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2193 goto define_a_symbol
;
2196 /* Since it's not the kludge case, re-dispatch to the right handler. */
2206 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
2210 case_N_STSYM
: /* Static symbol in data seg */
2211 case N_DSLINE
: /* Source line number, data seg */
2212 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
2213 goto define_a_symbol
;
2215 case_N_LCSYM
: /* Static symbol in BSS seg */
2216 case N_BSLINE
: /* Source line number, bss seg */
2217 /* N_BROWS: overlaps with N_BSLINE */
2218 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
2219 goto define_a_symbol
;
2221 case_N_ROSYM
: /* Static symbol in Read-only data seg */
2222 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
2223 goto define_a_symbol
;
2225 case N_ENTRY
: /* Alternate entry point */
2226 /* Relocate for dynamic loading */
2227 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2228 goto define_a_symbol
;
2230 /* The following symbol types we don't know how to process. Handle
2231 them in a "default" way, but complain to people who care. */
2233 case N_CATCH
: /* Exception handler catcher */
2234 case N_EHDECL
: /* Exception handler name */
2235 case N_PC
: /* Global symbol in Pascal */
2236 case N_M2C
: /* Modula-2 compilation unit */
2237 /* N_MOD2: overlaps with N_EHDECL */
2238 case N_SCOPE
: /* Modula-2 scope information */
2239 case N_ECOML
: /* End common (local name) */
2240 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
2245 complain (&unknown_symtype_complaint
, local_hex_string (type
));
2248 /* The following symbol types don't need the address field relocated,
2249 since it is either unused, or is absolute. */
2251 case N_GSYM
: /* Global variable */
2252 case N_NSYMS
: /* Number of symbols (ultrix) */
2253 case N_NOMAP
: /* No map? (ultrix) */
2254 case N_RSYM
: /* Register variable */
2255 case N_DEFD
: /* Modula-2 GNU module dependency */
2256 case N_SSYM
: /* Struct or union element */
2257 case N_LSYM
: /* Local symbol in stack */
2258 case N_PSYM
: /* Parameter variable */
2259 case N_LENG
: /* Length of preceding symbol type */
2263 char *colon_pos
= strchr (name
, ':');
2264 if (colon_pos
== NULL
)
2267 deftype
= colon_pos
[1];
2273 function_stab_type
= type
;
2275 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2276 /* Deal with the SunPRO 3.0 compiler which omits the address
2277 from N_FUN symbols. */
2279 && valu
== ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
)))
2281 find_stab_function_addr (name
, last_source_file
, objfile
);
2284 #ifdef SUN_FIXED_LBRAC_BUG
2285 /* The Sun acc compiler, under SunOS4, puts out
2286 functions with N_GSYM or N_STSYM. The problem is
2287 that the address of the symbol is no good (for N_GSYM
2288 it doesn't even attept an address; for N_STSYM it
2289 puts out an address but then it gets relocated
2290 relative to the data segment, not the text segment).
2291 Currently we can't fix this up later as we do for
2292 some types of symbol in scan_file_globals.
2293 Fortunately we do have a way of finding the address -
2294 we know that the value in last_pc_address is either
2295 the one we want (if we're dealing with the first
2296 function in an object file), or somewhere in the
2297 previous function. This means that we can use the
2298 minimal symbol table to get the address. */
2300 /* Starting with release 3.0, the Sun acc compiler,
2301 under SunOS4, puts out functions with N_FUN and a value
2302 of zero. This gets relocated to the start of the text
2303 segment of the module, which is no good either.
2304 Under SunOS4 we can deal with this as N_SLINE and N_SO
2305 entries contain valid absolute addresses.
2306 Release 3.0 acc also puts out N_OPT entries, which makes
2307 it possible to discern acc from cc or gcc. */
2309 if (type
== N_GSYM
|| type
== N_STSYM
2311 && n_opt_found
&& !block_address_function_relative
))
2313 struct minimal_symbol
*m
;
2314 int l
= colon_pos
- name
;
2316 m
= lookup_minimal_symbol_by_pc (last_pc_address
);
2317 if (m
&& STREQN (SYMBOL_NAME (m
), name
, l
)
2318 && SYMBOL_NAME (m
)[l
] == '\0')
2319 /* last_pc_address was in this function */
2320 valu
= SYMBOL_VALUE (m
);
2321 else if (m
&& SYMBOL_NAME (m
+ 1)
2322 && STREQN (SYMBOL_NAME (m
+ 1), name
, l
)
2323 && SYMBOL_NAME (m
+ 1)[l
] == '\0')
2324 /* last_pc_address was in last function */
2325 valu
= SYMBOL_VALUE (m
+ 1);
2327 /* Not found - use last_pc_address (for finish_block) */
2328 valu
= last_pc_address
;
2331 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2334 if (block_address_function_relative
)
2335 /* For Solaris 2.0 compilers, the block addresses and
2336 N_SLINE's are relative to the start of the
2337 function. On normal systems, and when using gcc on
2338 Solaris 2.0, these addresses are just absolute, or
2339 relative to the N_SO, depending on
2340 BLOCK_ADDRESS_ABSOLUTE. */
2341 function_start_offset
= valu
;
2343 within_function
= 1;
2345 if (context_stack_depth
> 1)
2347 complain (&lbrac_unmatched_complaint
, symnum
);
2351 if (context_stack_depth
> 0)
2353 new = pop_context ();
2354 /* Make a block for the local symbols within. */
2355 finish_block (new->name
, &local_symbols
, new->old_blocks
,
2356 new->start_addr
, valu
, objfile
);
2359 new = push_context (0, valu
);
2360 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
2364 define_symbol (valu
, name
, desc
, type
, objfile
);
2370 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2371 for a bunch of other flags, too. Someday we may parse their
2372 flags; for now we ignore theirs and hope they'll ignore ours. */
2373 case N_OPT
: /* Solaris 2: Compiler options */
2376 if (STREQ (name
, GCC2_COMPILED_FLAG_SYMBOL
))
2378 processing_gcc_compilation
= 2;
2379 #if 0 /* Works, but is experimental. -fnf */
2380 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2381 know whether it will use the old style or v3 mangling. */
2382 if (AUTO_DEMANGLING
)
2384 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2393 /* The following symbol types can be ignored. */
2394 case N_OBJ
: /* Solaris 2: Object file dir and name */
2395 /* N_UNDF: Solaris 2: file separator mark */
2396 /* N_UNDF: -- we will never encounter it, since we only process one
2397 file's symbols at once. */
2398 case N_ENDM
: /* Solaris 2: End of module */
2399 case N_MAIN
: /* Name of main routine. */
2400 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2404 /* '#' is a GNU C extension to allow one symbol to refer to another
2407 Generally this is used so that an alias can refer to its main
2411 /* Initialize symbol reference names and determine if this is
2412 a definition. If symbol reference is being defined, go
2413 ahead and add it. Otherwise, just return sym. */
2418 /* If this stab defines a new reference ID that is not on the
2419 reference list, then put it on the reference list.
2421 We go ahead and advance NAME past the reference, even though
2422 it is not strictly necessary at this time. */
2423 refnum
= symbol_reference_defined (&s
);
2425 if (!ref_search (refnum
))
2426 ref_add (refnum
, 0, name
, valu
);
2431 previous_stab_code
= type
;
2434 /* FIXME: The only difference between this and elfstab_build_psymtabs
2435 is the call to install_minimal_symbols for elf, and the support for
2436 split sections. If the differences are really that small, the code
2437 should be shared. */
2439 /* Scan and build partial symbols for an coff symbol file.
2440 The coff file has already been processed to get its minimal symbols.
2442 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2445 OBJFILE is the object file we are reading symbols from.
2446 ADDR is the address relative to which the symbols are (e.g.
2447 the base address of the text segment).
2448 MAINLINE is true if we are reading the main symbol
2449 table (as opposed to a shared lib or dynamically loaded file).
2450 TEXTADDR is the address of the text section.
2451 TEXTSIZE is the size of the text section.
2452 STABSECTS is the list of .stab sections in OBJFILE.
2453 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2454 .stabstr section exists.
2456 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2457 adjusted for coff details. */
2460 coffstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
2461 CORE_ADDR textaddr
, unsigned int textsize
,
2462 struct stab_section_list
*stabsects
,
2463 file_ptr stabstroffset
, unsigned int stabstrsize
)
2466 bfd
*sym_bfd
= objfile
->obfd
;
2467 char *name
= bfd_get_filename (sym_bfd
);
2468 struct dbx_symfile_info
*info
;
2469 unsigned int stabsize
;
2471 /* There is already a dbx_symfile_info allocated by our caller.
2472 It might even contain some info from the coff symtab to help us. */
2473 info
= objfile
->sym_stab_info
;
2475 DBX_TEXT_ADDR (objfile
) = textaddr
;
2476 DBX_TEXT_SIZE (objfile
) = textsize
;
2478 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2479 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
2480 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2482 if (stabstrsize
> bfd_get_size (sym_bfd
))
2483 error ("ridiculous string table size: %d bytes", stabstrsize
);
2484 DBX_STRINGTAB (objfile
) = (char *)
2485 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+ 1);
2486 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
2488 /* Now read in the string table in one big gulp. */
2490 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2492 perror_with_name (name
);
2493 val
= bfd_read (DBX_STRINGTAB (objfile
), stabstrsize
, 1, sym_bfd
);
2494 if (val
!= stabstrsize
)
2495 perror_with_name (name
);
2497 stabsread_new_init ();
2498 buildsym_new_init ();
2499 free_header_files ();
2500 init_header_files ();
2502 processing_acc_compilation
= 1;
2504 /* In a coff file, we've already installed the minimal symbols that came
2505 from the coff (non-stab) symbol table, so always act like an
2506 incremental load here. */
2507 if (stabsects
->next
== NULL
)
2509 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
2510 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2511 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
2515 struct stab_section_list
*stabsect
;
2517 DBX_SYMCOUNT (objfile
) = 0;
2518 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
2520 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
2521 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2524 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
2526 symbuf_sections
= stabsects
->next
;
2527 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
2531 dbx_symfile_read (objfile
, 0);
2534 /* Scan and build partial symbols for an ELF symbol file.
2535 This ELF file has already been processed to get its minimal symbols,
2536 and any DWARF symbols that were in it.
2538 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2541 OBJFILE is the object file we are reading symbols from.
2542 ADDR is the address relative to which the symbols are (e.g.
2543 the base address of the text segment).
2544 MAINLINE is true if we are reading the main symbol
2545 table (as opposed to a shared lib or dynamically loaded file).
2546 STABOFFSET and STABSIZE define the location in OBJFILE where the .stab
2548 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2549 .stabstr section exists.
2551 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2552 adjusted for elf details. */
2555 elfstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
2556 file_ptr staboffset
, unsigned int stabsize
,
2557 file_ptr stabstroffset
, unsigned int stabstrsize
)
2560 bfd
*sym_bfd
= objfile
->obfd
;
2561 char *name
= bfd_get_filename (sym_bfd
);
2562 struct dbx_symfile_info
*info
;
2564 /* There is already a dbx_symfile_info allocated by our caller.
2565 It might even contain some info from the ELF symtab to help us. */
2566 info
= objfile
->sym_stab_info
;
2568 /* Find the first and last text address. dbx_symfile_read seems to
2570 find_text_range (sym_bfd
, objfile
);
2572 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2573 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
2574 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2575 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2576 DBX_SYMTAB_OFFSET (objfile
) = staboffset
;
2578 if (stabstrsize
> bfd_get_size (sym_bfd
))
2579 error ("ridiculous string table size: %d bytes", stabstrsize
);
2580 DBX_STRINGTAB (objfile
) = (char *)
2581 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+ 1);
2582 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
2584 /* Now read in the string table in one big gulp. */
2586 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2588 perror_with_name (name
);
2589 val
= bfd_read (DBX_STRINGTAB (objfile
), stabstrsize
, 1, sym_bfd
);
2590 if (val
!= stabstrsize
)
2591 perror_with_name (name
);
2593 stabsread_new_init ();
2594 buildsym_new_init ();
2595 free_header_files ();
2596 init_header_files ();
2597 install_minimal_symbols (objfile
);
2599 processing_acc_compilation
= 1;
2601 /* In an elf file, we've already installed the minimal symbols that came
2602 from the elf (non-stab) symbol table, so always act like an
2603 incremental load here. */
2604 dbx_symfile_read (objfile
, 0);
2607 /* Scan and build partial symbols for a file with special sections for stabs
2608 and stabstrings. The file has already been processed to get its minimal
2609 symbols, and any other symbols that might be necessary to resolve GSYMs.
2611 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2614 OBJFILE is the object file we are reading symbols from.
2615 ADDR is the address relative to which the symbols are (e.g. the base address
2616 of the text segment).
2617 MAINLINE is true if we are reading the main symbol table (as opposed to a
2618 shared lib or dynamically loaded file).
2619 STAB_NAME is the name of the section that contains the stabs.
2620 STABSTR_NAME is the name of the section that contains the stab strings.
2622 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
2625 stabsect_build_psymtabs (struct objfile
*objfile
, int mainline
, char *stab_name
,
2626 char *stabstr_name
, char *text_name
)
2629 bfd
*sym_bfd
= objfile
->obfd
;
2630 char *name
= bfd_get_filename (sym_bfd
);
2632 asection
*stabstrsect
;
2633 asection
*text_sect
;
2635 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
2636 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
2642 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
2643 stab_name
, stabstr_name
);
2645 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
2646 xmalloc (sizeof (struct dbx_symfile_info
));
2647 memset (objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
2649 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
2651 error ("Can't find %s section in symbol file", text_name
);
2652 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
2653 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
2655 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
2656 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
2657 / DBX_SYMBOL_SIZE (objfile
);
2658 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
2659 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
2661 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
2662 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile
));
2663 DBX_STRINGTAB (objfile
) = (char *)
2664 obstack_alloc (&objfile
->psymbol_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
2665 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
2667 /* Now read in the string table in one big gulp. */
2669 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
2670 stabstrsect
, /* bfd section */
2671 DBX_STRINGTAB (objfile
), /* input buffer */
2672 0, /* offset into section */
2673 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
2676 perror_with_name (name
);
2678 stabsread_new_init ();
2679 buildsym_new_init ();
2680 free_header_files ();
2681 init_header_files ();
2682 install_minimal_symbols (objfile
);
2684 /* Now, do an incremental load */
2686 processing_acc_compilation
= 1;
2687 dbx_symfile_read (objfile
, 0);
2690 static struct sym_fns aout_sym_fns
=
2692 bfd_target_aout_flavour
,
2693 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2694 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2695 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
2696 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
2697 default_symfile_offsets
, /* sym_offsets: parse user's offsets to internal form */
2698 NULL
/* next: pointer to next struct sym_fns */
2702 _initialize_dbxread (void)
2704 add_symtab_fns (&aout_sym_fns
);