1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* This module provides three functions: dbx_symfile_init,
23 which initializes to read a symbol file; dbx_new_init, which
24 discards existing cached information when all symbols are being
25 discarded; and dbx_symfile_read, which reads a symbol table
28 dbx_symfile_read only does the minimum work necessary for letting the
29 user "name" things symbolically; it does not read the entire symtab.
30 Instead, it reads the external and static symbols and puts them in partial
31 symbol tables. When more extensive information is requested of a
32 file, the corresponding partial symbol table is mutated into a full
33 fledged symbol table by going back and reading the symbols
34 for real. dbx_psymtab_to_symtab() is the function that does this */
37 #include "gdb_string.h"
39 #if defined(USG) || defined(__CYGNUSCLIB__)
40 #include <sys/types.h>
48 #include "breakpoint.h"
51 #include "gdbcore.h" /* for bfd stuff */
52 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
56 #include "stabsread.h"
57 #include "gdb-stabs.h"
59 #include "language.h" /* Needed inside partial-stab.h */
60 #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
)
216 CORE_ADDR start
, end
;
218 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
219 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
221 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
222 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
226 if (sec_start
< start
)
241 error ("Can't find any code sections in symbol file");
243 DBX_TEXT_ADDR (objfile
) = start
;
244 DBX_TEXT_SIZE (objfile
) = end
- start
;
249 /* During initial symbol readin, we need to have a structure to keep
250 track of which psymtabs have which bincls in them. This structure
251 is used during readin to setup the list of dependencies within each
252 partial symbol table. */
254 struct header_file_location
256 char *name
; /* Name of header file */
257 int instance
; /* See above */
258 struct partial_symtab
*pst
; /* Partial symtab that has the
259 BINCL/EINCL defs for this file */
262 /* The actual list and controling variables */
263 static struct header_file_location
*bincl_list
, *next_bincl
;
264 static int bincls_allocated
;
266 /* Local function prototypes */
268 extern void _initialize_dbxread
PARAMS ((void));
271 process_now
PARAMS ((struct objfile
*));
274 free_header_files
PARAMS ((void));
277 init_header_files
PARAMS ((void));
280 read_ofile_symtab
PARAMS ((struct partial_symtab
*));
283 dbx_psymtab_to_symtab
PARAMS ((struct partial_symtab
*));
286 dbx_psymtab_to_symtab_1
PARAMS ((struct partial_symtab
*));
289 read_dbx_dynamic_symtab
PARAMS ((struct objfile
* objfile
));
292 read_dbx_symtab
PARAMS ((struct objfile
*));
295 free_bincl_list
PARAMS ((struct objfile
*));
297 static struct partial_symtab
*
298 find_corresponding_bincl_psymtab
PARAMS ((char *, int));
301 add_bincl_to_list
PARAMS ((struct partial_symtab
*, char *, int));
304 init_bincl_list
PARAMS ((int, struct objfile
*));
307 dbx_next_symbol_text
PARAMS ((struct objfile
*));
310 fill_symbuf
PARAMS ((bfd
*));
313 dbx_symfile_init
PARAMS ((struct objfile
*));
316 dbx_new_init
PARAMS ((struct objfile
*));
319 dbx_symfile_read
PARAMS ((struct objfile
*, int));
322 dbx_symfile_finish
PARAMS ((struct objfile
*));
325 record_minimal_symbol
PARAMS ((char *, CORE_ADDR
, int, struct objfile
*));
328 add_new_header_file
PARAMS ((char *, int));
331 add_old_header_file
PARAMS ((char *, int));
334 add_this_object_header_file
PARAMS ((int));
336 static struct partial_symtab
*
337 start_psymtab
PARAMS ((struct objfile
*, char *, CORE_ADDR
, int,
338 struct partial_symbol
**, struct partial_symbol
**));
340 /* Free up old header file tables */
345 if (this_object_header_files
)
347 free ((PTR
) this_object_header_files
);
348 this_object_header_files
= NULL
;
350 n_allocated_this_object_header_files
= 0;
353 /* Allocate new header file tables */
358 n_allocated_this_object_header_files
= 10;
359 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
362 /* Add header file number I for this object file
363 at the next successive FILENUM. */
366 add_this_object_header_file (i
)
369 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
371 n_allocated_this_object_header_files
*= 2;
372 this_object_header_files
373 = (int *) xrealloc ((char *) this_object_header_files
,
374 n_allocated_this_object_header_files
* sizeof (int));
377 this_object_header_files
[n_this_object_header_files
++] = i
;
380 /* Add to this file an "old" header file, one already seen in
381 a previous object file. NAME is the header file's name.
382 INSTANCE is its instance code, to select among multiple
383 symbol tables for the same header file. */
386 add_old_header_file (name
, instance
)
390 register struct header_file
*p
= HEADER_FILES (current_objfile
);
393 for (i
= 0; i
< N_HEADER_FILES (current_objfile
); i
++)
394 if (STREQ (p
[i
].name
, name
) && instance
== p
[i
].instance
)
396 add_this_object_header_file (i
);
399 complain (&repeated_header_complaint
, name
, symnum
);
402 /* Add to this file a "new" header file: definitions for its types follow.
403 NAME is the header file's name.
404 Most often this happens only once for each distinct header file,
405 but not necessarily. If it happens more than once, INSTANCE has
406 a different value each time, and references to the header file
407 use INSTANCE values to select among them.
409 dbx output contains "begin" and "end" markers for each new header file,
410 but at this level we just need to know which files there have been;
411 so we record the file when its "begin" is seen and ignore the "end". */
414 add_new_header_file (name
, instance
)
419 register struct header_file
*hfile
;
421 /* Make sure there is room for one more header file. */
423 i
= N_ALLOCATED_HEADER_FILES (current_objfile
);
425 if (N_HEADER_FILES (current_objfile
) == i
)
429 N_ALLOCATED_HEADER_FILES (current_objfile
) = 10;
430 HEADER_FILES (current_objfile
) = (struct header_file
*)
431 xmalloc (10 * sizeof (struct header_file
));
436 N_ALLOCATED_HEADER_FILES (current_objfile
) = i
;
437 HEADER_FILES (current_objfile
) = (struct header_file
*)
438 xrealloc ((char *) HEADER_FILES (current_objfile
),
439 (i
* sizeof (struct header_file
)));
443 /* Create an entry for this header file. */
445 i
= N_HEADER_FILES (current_objfile
)++;
446 hfile
= HEADER_FILES (current_objfile
) + i
;
447 hfile
->name
= savestring (name
, strlen (name
));
448 hfile
->instance
= instance
;
451 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
452 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
454 add_this_object_header_file (i
);
458 static struct type
**
459 explicit_lookup_type (real_filenum
, index
)
460 int real_filenum
, index
;
462 register struct header_file
*f
= &HEADER_FILES (current_objfile
)[real_filenum
];
464 if (index
>= f
->length
)
467 f
->vector
= (struct type
**)
468 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
469 memset (&f
->vector
[f
->length
/ 2],
470 '\0', f
->length
* sizeof (struct type
*) / 2);
472 return &f
->vector
[index
];
477 record_minimal_symbol (name
, address
, type
, objfile
)
481 struct objfile
*objfile
;
483 enum minimal_symbol_type ms_type
;
485 asection
*bfd_section
;
491 section
= SECT_OFF_TEXT
;
492 bfd_section
= DBX_TEXT_SECTION (objfile
);
496 section
= SECT_OFF_DATA
;
497 bfd_section
= DBX_DATA_SECTION (objfile
);
501 section
= SECT_OFF_BSS
;
502 bfd_section
= DBX_BSS_SECTION (objfile
);
512 section
= SECT_OFF_DATA
;
513 bfd_section
= DBX_DATA_SECTION (objfile
);
516 /* I don't think this type actually exists; since a N_SETV is the result
517 of going over many .o files, it doesn't make sense to have one
519 ms_type
= mst_file_data
;
520 section
= SECT_OFF_DATA
;
521 bfd_section
= DBX_DATA_SECTION (objfile
);
528 ms_type
= mst_file_text
;
529 section
= SECT_OFF_TEXT
;
530 bfd_section
= DBX_TEXT_SECTION (objfile
);
533 ms_type
= mst_file_data
;
535 /* Check for __DYNAMIC, which is used by Sun shared libraries.
536 Record it as global even if it's local, not global, so
537 lookup_minimal_symbol can find it. We don't check symbol_leading_char
538 because for SunOS4 it always is '_'. */
539 if (name
[8] == 'C' && STREQ ("__DYNAMIC", name
))
542 /* Same with virtual function tables, both global and static. */
544 char *tempstring
= name
;
545 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
547 if (VTBL_PREFIX_P ((tempstring
)))
550 section
= SECT_OFF_DATA
;
551 bfd_section
= DBX_DATA_SECTION (objfile
);
554 ms_type
= mst_file_bss
;
555 section
= SECT_OFF_BSS
;
556 bfd_section
= DBX_BSS_SECTION (objfile
);
559 ms_type
= mst_unknown
;
565 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
566 && address
< lowest_text_address
)
567 lowest_text_address
= address
;
569 prim_record_minimal_symbol_and_info
570 (name
, address
, ms_type
, NULL
, section
, bfd_section
, objfile
);
573 /* Scan and build partial symbols for a symbol file.
574 We have been initialized by a call to dbx_symfile_init, which
575 put all the relevant info into a "struct dbx_symfile_info",
576 hung off the objfile structure.
578 MAINLINE is true if we are reading the main symbol
579 table (as opposed to a shared lib or dynamically loaded file). */
582 dbx_symfile_read (objfile
, mainline
)
583 struct objfile
*objfile
;
584 int mainline
; /* FIXME comments above */
588 struct cleanup
*back_to
;
590 sym_bfd
= objfile
->obfd
;
592 /* .o and .nlm files are relocatables with text, data and bss segs based at
593 0. This flag disables special (Solaris stabs-in-elf only) fixups for
594 symbols with a value of 0. */
596 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
598 /* This is true for Solaris (and all other systems which put stabs
599 in sections, hopefully, since it would be silly to do things
600 differently from Solaris), and false for SunOS4 and other a.out
602 block_address_function_relative
=
603 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
604 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
605 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
606 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
607 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
609 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
611 perror_with_name (objfile
->name
);
613 /* If we are reinitializing, or if we have never loaded syms yet, init */
615 || objfile
->global_psymbols
.size
== 0
616 || objfile
->static_psymbols
.size
== 0)
617 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
619 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
620 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
622 free_pending_blocks ();
623 back_to
= make_cleanup (really_free_pendings
, 0);
625 init_minimal_symbol_collection ();
626 make_cleanup ((make_cleanup_func
) discard_minimal_symbols
, 0);
628 /* Read stabs data from executable file and define symbols. */
630 read_dbx_symtab (objfile
);
632 /* Add the dynamic symbols. */
634 read_dbx_dynamic_symtab (objfile
);
636 /* Install any minimal symbols that have been collected as the current
637 minimal symbols for this objfile. */
639 install_minimal_symbols (objfile
);
641 do_cleanups (back_to
);
644 /* Initialize anything that needs initializing when a completely new
645 symbol file is specified (not just adding some symbols from another
646 file, e.g. a shared library). */
649 dbx_new_init (ignore
)
650 struct objfile
*ignore
;
652 stabsread_new_init ();
653 buildsym_new_init ();
654 init_header_files ();
658 /* dbx_symfile_init ()
659 is the dbx-specific initialization routine for reading symbols.
660 It is passed a struct objfile which contains, among other things,
661 the BFD for the file whose symbols are being read, and a slot for a pointer
662 to "private data" which we fill with goodies.
664 We read the string table into malloc'd space and stash a pointer to it.
666 Since BFD doesn't know how to read debug symbols in a format-independent
667 way (and may never do so...), we have to do it ourselves. We will never
668 be called unless this is an a.out (or very similar) file.
669 FIXME, there should be a cleaner peephole into the BFD environment here. */
671 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
674 dbx_symfile_init (objfile
)
675 struct objfile
*objfile
;
678 bfd
*sym_bfd
= objfile
->obfd
;
679 char *name
= bfd_get_filename (sym_bfd
);
681 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
683 /* Allocate struct to keep track of the symfile */
684 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
685 xmmalloc (objfile
->md
, sizeof (struct dbx_symfile_info
));
686 memset ((PTR
) objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
688 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
689 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
690 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
692 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
693 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
694 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
696 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
698 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
700 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
702 error ("Can't find .text section in symbol file");
703 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
704 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
706 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
707 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
708 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
710 /* Read the string table and stash it away in the psymbol_obstack. It is
711 only needed as long as we need to expand psymbols into full symbols,
712 so when we blow away the psymbol the string table goes away as well.
713 Note that gdb used to use the results of attempting to malloc the
714 string table, based on the size it read, as a form of sanity check
715 for botched byte swapping, on the theory that a byte swapped string
716 table size would be so totally bogus that the malloc would fail. Now
717 that we put in on the psymbol_obstack, we can't do this since gdb gets
718 a fatal error (out of virtual memory) if the size is bogus. We can
719 however at least check to see if the size is less than the size of
720 the size field itself, or larger than the size of the entire file.
721 Note that all valid string tables have a size greater than zero, since
722 the bytes used to hold the size are included in the count. */
724 if (STRING_TABLE_OFFSET
== 0)
726 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
727 will never be zero, even when there is no string table. This
728 would appear to be a bug in bfd. */
729 DBX_STRINGTAB_SIZE (objfile
) = 0;
730 DBX_STRINGTAB (objfile
) = NULL
;
734 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
736 perror_with_name (name
);
738 memset ((PTR
) size_temp
, 0, sizeof (size_temp
));
739 val
= bfd_read ((PTR
) size_temp
, sizeof (size_temp
), 1, sym_bfd
);
742 perror_with_name (name
);
746 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
747 EOF if there is no string table, and attempting to read the size
748 from EOF will read zero bytes. */
749 DBX_STRINGTAB_SIZE (objfile
) = 0;
750 DBX_STRINGTAB (objfile
) = NULL
;
754 /* Read some data that would appear to be the string table size.
755 If there really is a string table, then it is probably the right
756 size. Byteswap if necessary and validate the size. Note that
757 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
758 random data that happened to be at STRING_TABLE_OFFSET, because
759 bfd can't tell us there is no string table, the sanity checks may
760 or may not catch this. */
761 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
763 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
764 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
765 error ("ridiculous string table size (%d bytes).",
766 DBX_STRINGTAB_SIZE (objfile
));
768 DBX_STRINGTAB (objfile
) =
769 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
770 DBX_STRINGTAB_SIZE (objfile
));
771 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
773 /* Now read in the string table in one big gulp. */
775 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
777 perror_with_name (name
);
778 val
= bfd_read (DBX_STRINGTAB (objfile
), DBX_STRINGTAB_SIZE (objfile
), 1,
780 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
781 perror_with_name (name
);
786 /* Perform any local cleanups required when we are done with a particular
787 objfile. I.E, we are in the process of discarding all symbol information
788 for an objfile, freeing up all memory held for it, and unlinking the
789 objfile struct from the global list of known objfiles. */
792 dbx_symfile_finish (objfile
)
793 struct objfile
*objfile
;
795 if (objfile
->sym_stab_info
!= NULL
)
797 if (HEADER_FILES (objfile
) != NULL
)
799 register int i
= N_HEADER_FILES (objfile
);
800 register struct header_file
*hfiles
= HEADER_FILES (objfile
);
804 free (hfiles
[i
].name
);
805 free (hfiles
[i
].vector
);
809 mfree (objfile
->md
, objfile
->sym_stab_info
);
811 free_header_files ();
815 /* Buffer for reading the symbol table entries. */
816 static struct external_nlist symbuf
[4096];
817 static int symbuf_idx
;
818 static int symbuf_end
;
820 /* cont_elem is used for continuing information in cfront.
821 It saves information about which types need to be fixed up and
822 completed after all the stabs are read. */
825 /* sym and stabsstring for continuing information in cfront */
828 /* state dependancies (statics that must be preserved) */
832 int (*func
) PARAMS ((struct objfile
*, struct symbol
*, char *));
833 /* other state dependancies include:
834 (assumption is that these will not change since process_now FIXME!!)
841 static struct cont_elem
*cont_list
= 0;
842 static int cont_limit
= 0;
843 static int cont_count
= 0;
845 /* Arrange for function F to be called with arguments SYM and P later
846 in the stabs reading process. */
848 process_later (sym
, p
, f
)
851 int (*f
) PARAMS ((struct objfile
*, struct symbol
*, char *));
854 /* Allocate more space for the deferred list. */
855 if (cont_count
>= cont_limit
- 1)
857 cont_limit
+= 32; /* chunk size */
860 = (struct cont_elem
*) xrealloc (cont_list
,
862 * sizeof (struct cont_elem
)));
864 error ("Virtual memory exhausted\n");
867 /* Save state variables so we can process these stabs later. */
868 cont_list
[cont_count
].sym_idx
= symbuf_idx
;
869 cont_list
[cont_count
].sym_end
= symbuf_end
;
870 cont_list
[cont_count
].symnum
= symnum
;
871 cont_list
[cont_count
].sym
= sym
;
872 cont_list
[cont_count
].stabs
= p
;
873 cont_list
[cont_count
].func
= f
;
877 /* Call deferred funtions in CONT_LIST. */
880 process_now (objfile
)
881 struct objfile
*objfile
;
890 int (*func
) PARAMS ((struct objfile
*, struct symbol
*, char *));
892 /* Save the state of our caller, we'll want to restore it before
894 save_symbuf_idx
= symbuf_idx
;
895 save_symbuf_end
= symbuf_end
;
896 save_symnum
= symnum
;
898 /* Iterate over all the deferred stabs. */
899 for (i
= 0; i
< cont_count
; i
++)
901 /* Restore the state for this deferred stab. */
902 symbuf_idx
= cont_list
[i
].sym_idx
;
903 symbuf_end
= cont_list
[i
].sym_end
;
904 symnum
= cont_list
[i
].symnum
;
905 sym
= cont_list
[i
].sym
;
906 stabs
= cont_list
[i
].stabs
;
907 func
= cont_list
[i
].func
;
909 /* Call the function to handle this deferrd stab. */
910 err
= (*func
) (objfile
, sym
, stabs
);
912 error ("Internal error: unable to resolve stab.\n");
915 /* Restore our caller's state. */
916 symbuf_idx
= save_symbuf_idx
;
917 symbuf_end
= save_symbuf_end
;
918 symnum
= save_symnum
;
923 /* Name of last function encountered. Used in Solaris to approximate
924 object file boundaries. */
925 static char *last_function_name
;
927 /* The address in memory of the string table of the object file we are
928 reading (which might not be the "main" object file, but might be a
929 shared library or some other dynamically loaded thing). This is
930 set by read_dbx_symtab when building psymtabs, and by
931 read_ofile_symtab when building symtabs, and is used only by
932 next_symbol_text. FIXME: If that is true, we don't need it when
933 building psymtabs, right? */
934 static char *stringtab_global
;
936 /* These variables are used to control fill_symbuf when the stabs
937 symbols are not contiguous (as may be the case when a COFF file is
938 linked using --split-by-reloc). */
939 static struct stab_section_list
*symbuf_sections
;
940 static unsigned int symbuf_left
;
941 static unsigned int symbuf_read
;
943 /* Refill the symbol table input buffer
944 and set the variables that control fetching entries from it.
945 Reports an error if no data available.
946 This function can read past the end of the symbol table
947 (into the string table) but this does no harm. */
950 fill_symbuf (sym_bfd
)
956 if (symbuf_sections
== NULL
)
957 count
= sizeof (symbuf
);
960 if (symbuf_left
<= 0)
962 file_ptr filepos
= symbuf_sections
->section
->filepos
;
963 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
964 perror_with_name (bfd_get_filename (sym_bfd
));
965 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
966 symbol_table_offset
= filepos
- symbuf_read
;
967 symbuf_sections
= symbuf_sections
->next
;
971 if (count
> sizeof (symbuf
))
972 count
= sizeof (symbuf
);
975 nbytes
= bfd_read ((PTR
) symbuf
, count
, 1, sym_bfd
);
977 perror_with_name (bfd_get_filename (sym_bfd
));
978 else if (nbytes
== 0)
979 error ("Premature end of file reading symbol table");
980 symbuf_end
= nbytes
/ symbol_size
;
982 symbuf_left
-= nbytes
;
983 symbuf_read
+= nbytes
;
986 #define SWAP_SYMBOL(symp, abfd) \
988 (symp)->n_strx = bfd_h_get_32(abfd, \
989 (unsigned char *)&(symp)->n_strx); \
990 (symp)->n_desc = bfd_h_get_16 (abfd, \
991 (unsigned char *)&(symp)->n_desc); \
992 (symp)->n_value = bfd_h_get_32 (abfd, \
993 (unsigned char *)&(symp)->n_value); \
996 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
998 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
999 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
1000 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
1001 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
1004 /* Invariant: The symbol pointed to by symbuf_idx is the first one
1005 that hasn't been swapped. Swap the symbol at the same time
1006 that symbuf_idx is incremented. */
1008 /* dbx allows the text of a symbol name to be continued into the
1009 next symbol name! When such a continuation is encountered
1010 (a \ at the end of the text of a name)
1011 call this function to get the continuation. */
1014 dbx_next_symbol_text (objfile
)
1015 struct objfile
*objfile
;
1017 struct internal_nlist nlist
;
1019 if (symbuf_idx
== symbuf_end
)
1020 fill_symbuf (symfile_bfd
);
1023 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
1024 OBJSTAT (objfile
, n_stabs
++);
1028 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
1031 /* Initialize the list of bincls to contain none and have some
1035 init_bincl_list (number
, objfile
)
1037 struct objfile
*objfile
;
1039 bincls_allocated
= number
;
1040 next_bincl
= bincl_list
= (struct header_file_location
*)
1041 xmmalloc (objfile
->md
, bincls_allocated
* sizeof (struct header_file_location
));
1044 /* Add a bincl to the list. */
1047 add_bincl_to_list (pst
, name
, instance
)
1048 struct partial_symtab
*pst
;
1052 if (next_bincl
>= bincl_list
+ bincls_allocated
)
1054 int offset
= next_bincl
- bincl_list
;
1055 bincls_allocated
*= 2;
1056 bincl_list
= (struct header_file_location
*)
1057 xmrealloc (pst
->objfile
->md
, (char *) bincl_list
,
1058 bincls_allocated
* sizeof (struct header_file_location
));
1059 next_bincl
= bincl_list
+ offset
;
1061 next_bincl
->pst
= pst
;
1062 next_bincl
->instance
= instance
;
1063 next_bincl
++->name
= name
;
1066 /* Given a name, value pair, find the corresponding
1067 bincl in the list. Return the partial symtab associated
1068 with that header_file_location. */
1070 static struct partial_symtab
*
1071 find_corresponding_bincl_psymtab (name
, instance
)
1075 struct header_file_location
*bincl
;
1077 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
1078 if (bincl
->instance
== instance
1079 && STREQ (name
, bincl
->name
))
1082 complain (&repeated_header_complaint
, name
, symnum
);
1083 return (struct partial_symtab
*) 0;
1086 /* Free the storage allocated for the bincl list. */
1089 free_bincl_list (objfile
)
1090 struct objfile
*objfile
;
1092 mfree (objfile
->md
, (PTR
) bincl_list
);
1093 bincls_allocated
= 0;
1096 /* Scan a SunOs dynamic symbol table for symbols of interest and
1097 add them to the minimal symbol table. */
1100 read_dbx_dynamic_symtab (objfile
)
1101 struct objfile
*objfile
;
1103 bfd
*abfd
= objfile
->obfd
;
1104 struct cleanup
*back_to
;
1114 CORE_ADDR sym_value
;
1117 /* Check that the symbol file has dynamic symbols that we know about.
1118 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1119 on a sun4 host (and vice versa) and bfd is not configured
1120 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1121 so we ignore the dynamic symbols in this case. */
1122 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1123 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1124 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1127 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1128 if (dynsym_size
< 0)
1131 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1132 back_to
= make_cleanup (free
, dynsyms
);
1134 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1135 if (dynsym_count
< 0)
1137 do_cleanups (back_to
);
1141 /* Enter dynamic symbols into the minimal symbol table
1142 if this is a stripped executable. */
1143 if (bfd_get_symcount (abfd
) <= 0)
1146 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1148 asymbol
*sym
= *symptr
;
1152 sec
= bfd_get_section (sym
);
1154 /* BFD symbols are section relative. */
1155 sym_value
= sym
->value
+ sec
->vma
;
1157 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1159 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT
);
1162 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1164 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA
);
1167 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1169 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS
);
1175 if (sym
->flags
& BSF_GLOBAL
)
1178 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1183 /* Symbols from shared libraries have a dynamic relocation entry
1184 that points to the associated slot in the procedure linkage table.
1185 We make a mininal symbol table entry with type mst_solib_trampoline
1186 at the address in the procedure linkage table. */
1187 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1188 if (dynrel_size
< 0)
1190 do_cleanups (back_to
);
1194 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1195 make_cleanup (free
, dynrels
);
1197 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1198 if (dynrel_count
< 0)
1200 do_cleanups (back_to
);
1204 for (counter
= 0, relptr
= dynrels
;
1205 counter
< dynrel_count
;
1206 counter
++, relptr
++)
1208 arelent
*rel
= *relptr
;
1210 rel
->address
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA
);
1212 switch (bfd_get_arch (abfd
))
1214 case bfd_arch_sparc
:
1215 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1219 /* `16' is the type BFD produces for a jump table relocation. */
1220 if (rel
->howto
->type
!= 16)
1223 /* Adjust address in the jump table to point to
1224 the start of the bsr instruction. */
1231 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1232 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1236 do_cleanups (back_to
);
1239 /* Setup partial_symtab's describing each source file for which
1240 debugging information is available. */
1243 read_dbx_symtab (objfile
)
1244 struct objfile
*objfile
;
1246 register struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1247 struct internal_nlist nlist
;
1248 CORE_ADDR text_addr
;
1251 register char *namestring
;
1253 int past_first_source_file
= 0;
1254 CORE_ADDR last_o_file_start
= 0;
1255 CORE_ADDR last_function_start
= 0;
1256 struct cleanup
*back_to
;
1258 int textlow_not_set
;
1260 /* Current partial symtab */
1261 struct partial_symtab
*pst
;
1263 /* List of current psymtab's include files */
1264 char **psymtab_include_list
;
1265 int includes_allocated
;
1268 /* Index within current psymtab dependency list */
1269 struct partial_symtab
**dependency_list
;
1270 int dependencies_used
, dependencies_allocated
;
1272 text_addr
= DBX_TEXT_ADDR (objfile
);
1273 text_size
= DBX_TEXT_SIZE (objfile
);
1275 /* FIXME. We probably want to change stringtab_global rather than add this
1276 while processing every symbol entry. FIXME. */
1277 file_string_table_offset
= 0;
1278 next_file_string_table_offset
= 0;
1280 stringtab_global
= DBX_STRINGTAB (objfile
);
1282 pst
= (struct partial_symtab
*) 0;
1284 includes_allocated
= 30;
1286 psymtab_include_list
= (char **) alloca (includes_allocated
*
1289 dependencies_allocated
= 30;
1290 dependencies_used
= 0;
1292 (struct partial_symtab
**) alloca (dependencies_allocated
*
1293 sizeof (struct partial_symtab
*));
1295 /* Init bincl list */
1296 init_bincl_list (20, objfile
);
1297 back_to
= make_cleanup ((make_cleanup_func
) free_bincl_list
, objfile
);
1299 last_source_file
= NULL
;
1301 lowest_text_address
= (CORE_ADDR
) -1;
1303 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1304 abfd
= objfile
->obfd
;
1305 symbuf_end
= symbuf_idx
= 0;
1306 next_symbol_text_func
= dbx_next_symbol_text
;
1307 textlow_not_set
= 1;
1308 has_line_numbers
= 0;
1310 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1312 /* Get the symbol for this run and pull out some info */
1313 QUIT
; /* allow this to be interruptable */
1314 if (symbuf_idx
== symbuf_end
)
1316 bufp
= &symbuf
[symbuf_idx
++];
1319 * Special case to speed up readin.
1321 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1323 has_line_numbers
= 1;
1327 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1328 OBJSTAT (objfile
, n_stabs
++);
1330 /* Ok. There is a lot of code duplicated in the rest of this
1331 switch statement (for efficiency reasons). Since I don't
1332 like duplicating code, I will do my penance here, and
1333 describe the code which is duplicated:
1335 *) The assignment to namestring.
1336 *) The call to strchr.
1337 *) The addition of a partial symbol the the two partial
1338 symbol lists. This last is a large section of code, so
1339 I've imbedded it in the following macro.
1342 /* Set namestring based on nlist. If the string table index is invalid,
1343 give a fake name, and print a single error message per symbol file read,
1344 rather than abort the symbol reading or flood the user with messages. */
1346 /*FIXME: Too many adds and indirections in here for the inner loop. */
1347 #define SET_NAMESTRING()\
1348 if (((unsigned)CUR_SYMBOL_STRX + file_string_table_offset) >= \
1349 DBX_STRINGTAB_SIZE (objfile)) { \
1350 complain (&string_table_offset_complaint, symnum); \
1351 namestring = "<bad string table offset>"; \
1353 namestring = CUR_SYMBOL_STRX + file_string_table_offset + \
1354 DBX_STRINGTAB (objfile)
1356 #define CUR_SYMBOL_TYPE nlist.n_type
1357 #define CUR_SYMBOL_VALUE nlist.n_value
1358 #define CUR_SYMBOL_STRX nlist.n_strx
1359 #define DBXREAD_ONLY
1360 #define START_PSYMTAB(ofile,fname,low,symoff,global_syms,static_syms)\
1361 start_psymtab(ofile, fname, low, symoff, global_syms, static_syms)
1362 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\
1363 end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)
1365 #include "partial-stab.h"
1368 /* If there's stuff to be cleaned up, clean it up. */
1369 if (DBX_SYMCOUNT (objfile
) > 0 /* We have some syms */
1370 /*FIXME, does this have a bug at start address 0? */
1371 && last_o_file_start
1372 && objfile
->ei
.entry_point
< nlist
.n_value
1373 && objfile
->ei
.entry_point
>= last_o_file_start
)
1375 objfile
->ei
.entry_file_lowpc
= last_o_file_start
;
1376 objfile
->ei
.entry_file_highpc
= nlist
.n_value
;
1381 /* Don't set pst->texthigh lower than it already is. */
1382 CORE_ADDR text_end
=
1383 (lowest_text_address
== (CORE_ADDR
) -1
1384 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT
))
1385 : lowest_text_address
)
1388 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1389 symnum
* symbol_size
,
1390 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
1391 dependency_list
, dependencies_used
, textlow_not_set
);
1394 do_cleanups (back_to
);
1397 /* Allocate and partially fill a partial symtab. It will be
1398 completely filled at the end of the symbol list.
1400 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1401 is the address relative to which its symbols are (incremental) or 0
1405 static struct partial_symtab
*
1406 start_psymtab (objfile
, filename
, textlow
, ldsymoff
, global_syms
, static_syms
)
1407 struct objfile
*objfile
;
1411 struct partial_symbol
**global_syms
;
1412 struct partial_symbol
**static_syms
;
1414 struct partial_symtab
*result
=
1415 start_psymtab_common (objfile
, objfile
->section_offsets
,
1416 filename
, textlow
, global_syms
, static_syms
);
1418 result
->read_symtab_private
= (char *)
1419 obstack_alloc (&objfile
->psymbol_obstack
, sizeof (struct symloc
));
1420 LDSYMOFF (result
) = ldsymoff
;
1421 result
->read_symtab
= dbx_psymtab_to_symtab
;
1422 SYMBOL_SIZE (result
) = symbol_size
;
1423 SYMBOL_OFFSET (result
) = symbol_table_offset
;
1424 STRING_OFFSET (result
) = string_table_offset
;
1425 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
1427 /* If we're handling an ELF file, drag some section-relocation info
1428 for this source file out of the ELF symbol table, to compensate for
1429 Sun brain death. This replaces the section_offsets in this psymtab,
1431 elfstab_offset_sections (objfile
, result
);
1433 /* Deduce the source language from the filename for this psymtab. */
1434 psymtab_language
= deduce_language_from_filename (filename
);
1439 /* Close off the current usage of PST.
1440 Returns PST or NULL if the partial symtab was empty and thrown away.
1442 FIXME: List variables and peculiarities of same. */
1444 struct partial_symtab
*
1445 end_psymtab (pst
, include_list
, num_includes
, capping_symbol_offset
,
1446 capping_text
, dependency_list
, number_dependencies
, textlow_not_set
)
1447 struct partial_symtab
*pst
;
1448 char **include_list
;
1450 int capping_symbol_offset
;
1451 CORE_ADDR capping_text
;
1452 struct partial_symtab
**dependency_list
;
1453 int number_dependencies
;
1454 int textlow_not_set
;
1457 struct objfile
*objfile
= pst
->objfile
;
1459 if (capping_symbol_offset
!= -1)
1460 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
1461 pst
->texthigh
= capping_text
;
1463 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1464 /* Under Solaris, the N_SO symbols always have a value of 0,
1465 instead of the usual address of the .o file. Therefore,
1466 we have to do some tricks to fill in texthigh and textlow.
1467 The first trick is in partial-stab.h: if we see a static
1468 or global function, and the textlow for the current pst
1469 is not set (ie: textlow_not_set), then we use that function's
1470 address for the textlow of the pst. */
1472 /* Now, to fill in texthigh, we remember the last function seen
1473 in the .o file (also in partial-stab.h). Also, there's a hack in
1474 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1475 to here via the misc_info field. Therefore, we can fill in
1476 a reliable texthigh by taking the address plus size of the
1477 last function in the file. */
1479 if (pst
->texthigh
== 0 && last_function_name
)
1483 struct minimal_symbol
*minsym
;
1485 p
= strchr (last_function_name
, ':');
1487 p
= last_function_name
;
1488 n
= p
- last_function_name
;
1490 strncpy (p
, last_function_name
, n
);
1493 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
1496 /* Sun Fortran appends an underscore to the minimal symbol name,
1497 try again with an appended underscore if the minimal symbol
1501 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
1505 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
1507 last_function_name
= NULL
;
1510 /* this test will be true if the last .o file is only data */
1511 if (textlow_not_set
)
1512 pst
->textlow
= pst
->texthigh
;
1515 struct partial_symtab
*p1
;
1517 /* If we know our own starting text address, then walk through all other
1518 psymtabs for this objfile, and if any didn't know their ending text
1519 address, set it to our starting address. Take care to not set our
1520 own ending address to our starting address, nor to set addresses on
1521 `dependency' files that have both textlow and texthigh zero. */
1523 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
1525 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
1527 p1
->texthigh
= pst
->textlow
;
1528 /* if this file has only data, then make textlow match texthigh */
1529 if (p1
->textlow
== 0)
1530 p1
->textlow
= p1
->texthigh
;
1535 /* End of kludge for patching Solaris textlow and texthigh. */
1536 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
1538 pst
->n_global_syms
=
1539 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1540 pst
->n_static_syms
=
1541 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1543 pst
->number_of_dependencies
= number_dependencies
;
1544 if (number_dependencies
)
1546 pst
->dependencies
= (struct partial_symtab
**)
1547 obstack_alloc (&objfile
->psymbol_obstack
,
1548 number_dependencies
* sizeof (struct partial_symtab
*));
1549 memcpy (pst
->dependencies
, dependency_list
,
1550 number_dependencies
* sizeof (struct partial_symtab
*));
1553 pst
->dependencies
= 0;
1555 for (i
= 0; i
< num_includes
; i
++)
1557 struct partial_symtab
*subpst
=
1558 allocate_psymtab (include_list
[i
], objfile
);
1560 subpst
->section_offsets
= pst
->section_offsets
;
1561 subpst
->read_symtab_private
=
1562 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
1563 sizeof (struct symloc
));
1567 subpst
->texthigh
= 0;
1569 /* We could save slight bits of space by only making one of these,
1570 shared by the entire set of include files. FIXME-someday. */
1571 subpst
->dependencies
= (struct partial_symtab
**)
1572 obstack_alloc (&objfile
->psymbol_obstack
,
1573 sizeof (struct partial_symtab
*));
1574 subpst
->dependencies
[0] = pst
;
1575 subpst
->number_of_dependencies
= 1;
1577 subpst
->globals_offset
=
1578 subpst
->n_global_syms
=
1579 subpst
->statics_offset
=
1580 subpst
->n_static_syms
= 0;
1584 subpst
->read_symtab
= pst
->read_symtab
;
1587 sort_pst_symbols (pst
);
1589 /* If there is already a psymtab or symtab for a file of this name, remove it.
1590 (If there is a symtab, more drastic things also happen.)
1591 This happens in VxWorks. */
1592 free_named_symtabs (pst
->filename
);
1594 if (num_includes
== 0
1595 && number_dependencies
== 0
1596 && pst
->n_global_syms
== 0
1597 && pst
->n_static_syms
== 0
1598 && has_line_numbers
== 0)
1600 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1601 it is on the obstack, but we can forget to chain it on the list. */
1602 /* Empty psymtabs happen as a result of header files which don't have
1603 any symbols in them. There can be a lot of them. But this check
1604 is wrong, in that a psymtab with N_SLINE entries but nothing else
1605 is not empty, but we don't realize that. Fixing that without slowing
1606 things down might be tricky. */
1608 discard_psymtab (pst
);
1610 /* Indicate that psymtab was thrown away. */
1611 pst
= (struct partial_symtab
*) NULL
;
1617 dbx_psymtab_to_symtab_1 (pst
)
1618 struct partial_symtab
*pst
;
1620 struct cleanup
*old_chain
;
1628 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1633 /* Read in all partial symtabs on which this one is dependent */
1634 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1635 if (!pst
->dependencies
[i
]->readin
)
1637 /* Inform about additional files that need to be read in. */
1640 fputs_filtered (" ", gdb_stdout
);
1642 fputs_filtered ("and ", gdb_stdout
);
1644 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1645 wrap_here (""); /* Flush output */
1646 gdb_flush (gdb_stdout
);
1648 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1651 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy */
1653 /* Init stuff necessary for reading in symbols */
1656 old_chain
= make_cleanup (really_free_pendings
, 0);
1657 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
1658 symbol_size
= SYMBOL_SIZE (pst
);
1660 /* Read in this file's symbols */
1661 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
1662 read_ofile_symtab (pst
);
1663 sort_symtab_syms (pst
->symtab
);
1665 do_cleanups (old_chain
);
1671 /* Read in all of the symbols for a given psymtab for real.
1672 Be verbose about it if the user wants that. */
1675 dbx_psymtab_to_symtab (pst
)
1676 struct partial_symtab
*pst
;
1685 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1690 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
1692 /* Print the message now, before reading the string table,
1693 to avoid disconcerting pauses. */
1696 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1697 gdb_flush (gdb_stdout
);
1700 sym_bfd
= pst
->objfile
->obfd
;
1702 next_symbol_text_func
= dbx_next_symbol_text
;
1704 dbx_psymtab_to_symtab_1 (pst
);
1706 /* Match with global symbols. This only needs to be done once,
1707 after all of the symtabs and dependencies have been read in. */
1708 scan_file_globals (pst
->objfile
);
1710 /* Finish up the debug error message. */
1712 printf_filtered ("done.\n");
1716 /* Read in a defined section of a specific object file's symbols. */
1719 read_ofile_symtab (pst
)
1720 struct partial_symtab
*pst
;
1722 register char *namestring
;
1723 register struct external_nlist
*bufp
;
1724 struct internal_nlist nlist
;
1726 unsigned max_symnum
;
1728 struct objfile
*objfile
;
1729 int sym_offset
; /* Offset to start of symbols to read */
1730 int sym_size
; /* Size of symbols to read */
1731 CORE_ADDR text_offset
; /* Start of text segment for symbols */
1732 int text_size
; /* Size of text segment for symbols */
1733 struct section_offsets
*section_offsets
;
1735 objfile
= pst
->objfile
;
1736 sym_offset
= LDSYMOFF (pst
);
1737 sym_size
= LDSYMLEN (pst
);
1738 text_offset
= pst
->textlow
;
1739 text_size
= pst
->texthigh
- pst
->textlow
;
1740 section_offsets
= pst
->section_offsets
;
1742 current_objfile
= objfile
;
1743 subfile_stack
= NULL
;
1745 stringtab_global
= DBX_STRINGTAB (objfile
);
1746 last_source_file
= NULL
;
1748 abfd
= objfile
->obfd
;
1749 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
1750 symbuf_end
= symbuf_idx
= 0;
1752 /* It is necessary to actually read one symbol *before* the start
1753 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1754 occurs before the N_SO symbol.
1756 Detecting this in read_dbx_symtab
1757 would slow down initial readin, so we look for it here instead. */
1758 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
1760 bfd_seek (symfile_bfd
, sym_offset
- symbol_size
, SEEK_CUR
);
1762 bufp
= &symbuf
[symbuf_idx
++];
1763 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1764 OBJSTAT (objfile
, n_stabs
++);
1768 processing_gcc_compilation
= 0;
1769 if (nlist
.n_type
== N_TEXT
)
1771 const char *tempstring
= namestring
;
1773 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1774 processing_gcc_compilation
= 1;
1775 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1776 processing_gcc_compilation
= 2;
1777 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
1779 if (STREQN (tempstring
, "__gnu_compiled", 14))
1780 processing_gcc_compilation
= 2;
1783 /* Try to select a C++ demangling based on the compilation unit
1786 if (processing_gcc_compilation
)
1788 if (AUTO_DEMANGLING
)
1790 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1796 /* The N_SO starting this symtab is the first symbol, so we
1797 better not check the symbol before it. I'm not this can
1798 happen, but it doesn't hurt to check for it. */
1799 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
1800 processing_gcc_compilation
= 0;
1803 if (symbuf_idx
== symbuf_end
)
1805 bufp
= &symbuf
[symbuf_idx
];
1806 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
1807 error ("First symbol in segment of executable not a source symbol");
1809 max_symnum
= sym_size
/ symbol_size
;
1812 symnum
< max_symnum
;
1815 QUIT
; /* Allow this to be interruptable */
1816 if (symbuf_idx
== symbuf_end
)
1818 bufp
= &symbuf
[symbuf_idx
++];
1819 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1820 OBJSTAT (objfile
, n_stabs
++);
1822 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
1828 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
1829 namestring
, section_offsets
, objfile
);
1831 /* We skip checking for a new .o or -l file; that should never
1832 happen in this routine. */
1833 else if (type
== N_TEXT
)
1835 /* I don't think this code will ever be executed, because
1836 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1837 the N_SO symbol which starts this source file.
1838 However, there is no reason not to accept
1839 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1841 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1842 processing_gcc_compilation
= 1;
1843 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1844 processing_gcc_compilation
= 2;
1846 if (AUTO_DEMANGLING
)
1848 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1851 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
1852 || type
== (unsigned char) N_NBTEXT
1855 /* Global symbol: see if we came across a dbx defintion for
1856 a corresponding symbol. If so, store the value. Remove
1857 syms from the chain when their values are stored, but
1858 search the whole chain, as there may be several syms from
1859 different files with the same name. */
1860 /* This is probably not true. Since the files will be read
1861 in one at a time, each reference to a global symbol will
1862 be satisfied in each file as it appears. So we skip this
1868 current_objfile
= NULL
;
1870 /* In a Solaris elf file, this variable, which comes from the
1871 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1872 which comes from pst->textlow is correct. */
1873 if (last_source_start_addr
== 0)
1874 last_source_start_addr
= text_offset
;
1876 /* In reordered executables last_source_start_addr may not be the
1877 lower bound for this symtab, instead use text_offset which comes
1878 from pst->textlow which is correct. */
1879 if (last_source_start_addr
> text_offset
)
1880 last_source_start_addr
= text_offset
;
1882 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
, SECT_OFF_TEXT
);
1884 /* Process items which we had to "process_later" due to dependancies
1886 process_now (objfile
);
1892 /* This handles a single symbol from the symbol-file, building symbols
1893 into a GDB symtab. It takes these arguments and an implicit argument.
1895 TYPE is the type field of the ".stab" symbol entry.
1896 DESC is the desc field of the ".stab" entry.
1897 VALU is the value field of the ".stab" entry.
1898 NAME is the symbol name, in our address space.
1899 SECTION_OFFSETS is a set of amounts by which the sections of this object
1900 file were relocated when it was loaded into memory.
1901 All symbols that refer
1902 to memory locations need to be offset by these amounts.
1903 OBJFILE is the object file from which we are reading symbols.
1904 It is used in end_symtab. */
1907 process_one_symbol (type
, desc
, valu
, name
, section_offsets
, objfile
)
1911 struct section_offsets
*section_offsets
;
1912 struct objfile
*objfile
;
1914 #ifdef SUN_FIXED_LBRAC_BUG
1915 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
1916 to correct the address of N_LBRAC's. If it is not defined, then
1917 we never need to correct the addresses. */
1919 /* This records the last pc address we've seen. We depend on there being
1920 an SLINE or FUN or SO before the first LBRAC, since the variable does
1921 not get reset in between reads of different symbol files. */
1922 static CORE_ADDR last_pc_address
;
1925 register struct context_stack
*new;
1926 /* This remembers the address of the start of a function. It is used
1927 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
1928 relative to the current function's start address. On systems
1929 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
1930 used to relocate these symbol types rather than SECTION_OFFSETS. */
1931 static CORE_ADDR function_start_offset
;
1933 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
1934 file. Used to detect the SunPRO solaris compiler. */
1935 static int n_opt_found
;
1937 /* The stab type used for the definition of the last function.
1938 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1939 static int function_stab_type
= 0;
1941 if (!block_address_function_relative
)
1942 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
1943 function start address, so just use the text offset. */
1944 function_start_offset
= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1946 /* Something is wrong if we see real data before
1947 seeing a source file name. */
1949 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
1951 /* Ignore any symbols which appear before an N_SO symbol.
1952 Currently no one puts symbols there, but we should deal
1953 gracefully with the case. A complain()t might be in order,
1954 but this should not be an error (). */
1963 if (*name
== '\000')
1965 /* This N_FUN marks the end of a function. This closes off the
1967 within_function
= 0;
1968 new = pop_context ();
1970 /* Make a block for the local symbols within. */
1971 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1972 new->start_addr
, new->start_addr
+ valu
,
1975 /* May be switching to an assembler file which may not be using
1976 block relative stabs, so reset the offset. */
1977 if (block_address_function_relative
)
1978 function_start_offset
= 0;
1983 /* Relocate for dynamic loading */
1984 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1985 #ifdef SMASH_TEXT_ADDRESS
1986 SMASH_TEXT_ADDRESS (valu
);
1988 goto define_a_symbol
;
1991 /* This "symbol" just indicates the start of an inner lexical
1992 context within a function. */
1994 /* Ignore extra outermost context from SunPRO cc and acc. */
1995 if (n_opt_found
&& desc
== 1)
1998 if (block_address_function_relative
)
1999 /* Relocate for Sun ELF acc fn-relative syms. */
2000 valu
+= function_start_offset
;
2002 /* On most machines, the block addresses are relative to the
2003 N_SO, the linker did not relocate them (sigh). */
2004 valu
+= last_source_start_addr
;
2006 #ifdef SUN_FIXED_LBRAC_BUG
2007 if (!SUN_FIXED_LBRAC_BUG
&& valu
< last_pc_address
)
2009 /* Patch current LBRAC pc value to match last handy pc value */
2010 complain (&lbrac_complaint
);
2011 valu
= last_pc_address
;
2014 new = push_context (desc
, valu
);
2018 /* This "symbol" just indicates the end of an inner lexical
2019 context that was started with N_LBRAC. */
2021 /* Ignore extra outermost context from SunPRO cc and acc. */
2022 if (n_opt_found
&& desc
== 1)
2025 if (block_address_function_relative
)
2026 /* Relocate for Sun ELF acc fn-relative syms. */
2027 valu
+= function_start_offset
;
2029 /* On most machines, the block addresses are relative to the
2030 N_SO, the linker did not relocate them (sigh). */
2031 valu
+= last_source_start_addr
;
2033 new = pop_context ();
2034 if (desc
!= new->depth
)
2035 complain (&lbrac_mismatch_complaint
, symnum
);
2037 /* Some compilers put the variable decls inside of an
2038 LBRAC/RBRAC block. This macro should be nonzero if this
2039 is true. DESC is N_DESC from the N_RBRAC symbol.
2040 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
2041 or the GCC2_COMPILED_SYMBOL. */
2042 #if !defined (VARIABLES_INSIDE_BLOCK)
2043 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2046 /* Can only use new->locals as local symbols here if we're in
2047 gcc or on a machine that puts them before the lbrack. */
2048 if (!VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2049 local_symbols
= new->locals
;
2051 if (context_stack_depth
2052 > !VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2054 /* This is not the outermost LBRAC...RBRAC pair in the function,
2055 its local symbols preceded it, and are the ones just recovered
2056 from the context stack. Define the block for them (but don't
2057 bother if the block contains no symbols. Should we complain
2058 on blocks without symbols? I can't think of any useful purpose
2060 if (local_symbols
!= NULL
)
2062 /* Muzzle a compiler bug that makes end < start. (which
2063 compilers? Is this ever harmful?). */
2064 if (new->start_addr
> valu
)
2066 complain (&lbrac_rbrac_complaint
);
2067 new->start_addr
= valu
;
2069 /* Make a block for the local symbols within. */
2070 finish_block (0, &local_symbols
, new->old_blocks
,
2071 new->start_addr
, valu
, objfile
);
2076 /* This is the outermost LBRAC...RBRAC pair. There is no
2077 need to do anything; leave the symbols that preceded it
2078 to be attached to the function's own block. We need to
2079 indicate that we just moved outside of the function. */
2080 within_function
= 0;
2083 if (VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2084 /* Now pop locals of block just finished. */
2085 local_symbols
= new->locals
;
2090 /* This kind of symbol indicates the start of an object file. */
2091 /* Relocate for dynamic loading */
2092 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2096 /* This type of symbol indicates the start of data
2097 for one source file.
2098 Finish the symbol table of the previous source file
2099 (if any) and start accumulating a new symbol table. */
2100 /* Relocate for dynamic loading */
2101 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2105 #ifdef SUN_FIXED_LBRAC_BUG
2106 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2109 #ifdef PCC_SOL_BROKEN
2110 /* pcc bug, occasionally puts out SO for SOL. */
2111 if (context_stack_depth
> 0)
2113 start_subfile (name
, NULL
);
2117 if (last_source_file
)
2119 /* Check if previous symbol was also an N_SO (with some
2120 sanity checks). If so, that one was actually the directory
2121 name, and the current one is the real file name.
2123 if (previous_stab_code
== (unsigned char) N_SO
)
2125 patch_subfile_names (current_subfile
, name
);
2126 break; /* Ignore repeated SOs */
2128 end_symtab (valu
, objfile
, SECT_OFF_TEXT
);
2132 /* Null name means this just marks the end of text for this .o file.
2133 Don't start a new symtab in this case. */
2134 if (*name
== '\000')
2137 if (block_address_function_relative
)
2138 function_start_offset
= 0;
2141 start_symtab (name
, NULL
, valu
);
2142 record_debugformat ("stabs");
2146 /* This type of symbol indicates the start of data for
2147 a sub-source-file, one whose contents were copied or
2148 included in the compilation of the main source file
2149 (whose name was given in the N_SO symbol.) */
2150 /* Relocate for dynamic loading */
2151 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2152 start_subfile (name
, current_subfile
->dirname
);
2157 add_new_header_file (name
, valu
);
2158 start_subfile (name
, current_subfile
->dirname
);
2162 start_subfile (pop_subfile (), current_subfile
->dirname
);
2166 add_old_header_file (name
, valu
);
2170 /* This type of "symbol" really just records
2171 one line-number -- core-address correspondence.
2172 Enter it in the line list for this symbol table. */
2174 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
2175 valu
+= function_start_offset
;
2177 #ifdef SUN_FIXED_LBRAC_BUG
2178 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2180 record_line (current_subfile
, desc
, valu
);
2184 common_block_start (name
, objfile
);
2188 common_block_end (objfile
);
2191 /* The following symbol types need to have the appropriate offset added
2192 to their value; then we process symbol definitions in the name. */
2194 case N_STSYM
: /* Static symbol in data seg */
2195 case N_LCSYM
: /* Static symbol in BSS seg */
2196 case N_ROSYM
: /* Static symbol in Read-only data seg */
2197 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2198 Solaris2's stabs-in-elf makes *most* symbols relative
2199 but leaves a few absolute (at least for Solaris 2.1 and version
2200 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
2201 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
2202 .stab "foo:V...",N_STSYM is relative (section base subtracted).
2203 This leaves us no choice but to search for the 'S' or 'V'...
2204 (or pass the whole section_offsets stuff down ONE MORE function
2205 call level, which we really don't want to do). */
2209 /* .o files and NLMs have non-zero text seg offsets, but don't need
2210 their static syms offset in this fashion. XXX - This is really a
2211 crock that should be fixed in the solib handling code so that I
2212 don't have to work around it here. */
2214 if (!symfile_relocatable
)
2216 p
= strchr (name
, ':');
2217 if (p
!= 0 && p
[1] == 'S')
2219 /* The linker relocated it. We don't want to add an
2220 elfstab_offset_sections-type offset, but we *do* want
2221 to add whatever solib.c passed to symbol_file_add as
2222 addr (this is known to affect SunOS4, and I suspect ELF
2223 too). Since elfstab_offset_sections currently does not
2224 muck with the text offset (there is no Ttext.text
2225 symbol), we can get addr from the text offset. If
2226 elfstab_offset_sections ever starts dealing with the
2227 text offset, and we still need to do this, we need to
2228 invent a SECT_OFF_ADDR_KLUDGE or something. */
2229 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2230 goto define_a_symbol
;
2233 /* Since it's not the kludge case, re-dispatch to the right handler. */
2247 case_N_STSYM
: /* Static symbol in data seg */
2248 case N_DSLINE
: /* Source line number, data seg */
2249 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA
);
2250 goto define_a_symbol
;
2252 case_N_LCSYM
: /* Static symbol in BSS seg */
2253 case N_BSLINE
: /* Source line number, bss seg */
2254 /* N_BROWS: overlaps with N_BSLINE */
2255 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS
);
2256 goto define_a_symbol
;
2258 case_N_ROSYM
: /* Static symbol in Read-only data seg */
2259 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA
);
2260 goto define_a_symbol
;
2262 case N_ENTRY
: /* Alternate entry point */
2263 /* Relocate for dynamic loading */
2264 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2265 goto define_a_symbol
;
2267 /* The following symbol types we don't know how to process. Handle
2268 them in a "default" way, but complain to people who care. */
2270 case N_CATCH
: /* Exception handler catcher */
2271 case N_EHDECL
: /* Exception handler name */
2272 case N_PC
: /* Global symbol in Pascal */
2273 case N_M2C
: /* Modula-2 compilation unit */
2274 /* N_MOD2: overlaps with N_EHDECL */
2275 case N_SCOPE
: /* Modula-2 scope information */
2276 case N_ECOML
: /* End common (local name) */
2277 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
2282 complain (&unknown_symtype_complaint
, local_hex_string (type
));
2285 /* The following symbol types don't need the address field relocated,
2286 since it is either unused, or is absolute. */
2288 case N_GSYM
: /* Global variable */
2289 case N_NSYMS
: /* Number of symbols (ultrix) */
2290 case N_NOMAP
: /* No map? (ultrix) */
2291 case N_RSYM
: /* Register variable */
2292 case N_DEFD
: /* Modula-2 GNU module dependency */
2293 case N_SSYM
: /* Struct or union element */
2294 case N_LSYM
: /* Local symbol in stack */
2295 case N_PSYM
: /* Parameter variable */
2296 case N_LENG
: /* Length of preceding symbol type */
2300 char *colon_pos
= strchr (name
, ':');
2301 if (colon_pos
== NULL
)
2304 deftype
= colon_pos
[1];
2310 function_stab_type
= type
;
2312 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2313 /* Deal with the SunPRO 3.0 compiler which omits the address
2314 from N_FUN symbols. */
2316 && valu
== ANOFFSET (section_offsets
, SECT_OFF_TEXT
))
2318 find_stab_function_addr (name
, last_source_file
, objfile
);
2321 #ifdef SUN_FIXED_LBRAC_BUG
2322 /* The Sun acc compiler, under SunOS4, puts out
2323 functions with N_GSYM or N_STSYM. The problem is
2324 that the address of the symbol is no good (for N_GSYM
2325 it doesn't even attept an address; for N_STSYM it
2326 puts out an address but then it gets relocated
2327 relative to the data segment, not the text segment).
2328 Currently we can't fix this up later as we do for
2329 some types of symbol in scan_file_globals.
2330 Fortunately we do have a way of finding the address -
2331 we know that the value in last_pc_address is either
2332 the one we want (if we're dealing with the first
2333 function in an object file), or somewhere in the
2334 previous function. This means that we can use the
2335 minimal symbol table to get the address. */
2337 /* Starting with release 3.0, the Sun acc compiler,
2338 under SunOS4, puts out functions with N_FUN and a value
2339 of zero. This gets relocated to the start of the text
2340 segment of the module, which is no good either.
2341 Under SunOS4 we can deal with this as N_SLINE and N_SO
2342 entries contain valid absolute addresses.
2343 Release 3.0 acc also puts out N_OPT entries, which makes
2344 it possible to discern acc from cc or gcc. */
2346 if (type
== N_GSYM
|| type
== N_STSYM
2348 && n_opt_found
&& !block_address_function_relative
))
2350 struct minimal_symbol
*m
;
2351 int l
= colon_pos
- name
;
2353 m
= lookup_minimal_symbol_by_pc (last_pc_address
);
2354 if (m
&& STREQN (SYMBOL_NAME (m
), name
, l
)
2355 && SYMBOL_NAME (m
)[l
] == '\0')
2356 /* last_pc_address was in this function */
2357 valu
= SYMBOL_VALUE (m
);
2358 else if (m
&& SYMBOL_NAME (m
+ 1)
2359 && STREQN (SYMBOL_NAME (m
+ 1), name
, l
)
2360 && SYMBOL_NAME (m
+ 1)[l
] == '\0')
2361 /* last_pc_address was in last function */
2362 valu
= SYMBOL_VALUE (m
+ 1);
2364 /* Not found - use last_pc_address (for finish_block) */
2365 valu
= last_pc_address
;
2368 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2371 if (block_address_function_relative
)
2372 /* For Solaris 2.0 compilers, the block addresses and
2373 N_SLINE's are relative to the start of the
2374 function. On normal systems, and when using gcc on
2375 Solaris 2.0, these addresses are just absolute, or
2376 relative to the N_SO, depending on
2377 BLOCK_ADDRESS_ABSOLUTE. */
2378 function_start_offset
= valu
;
2380 within_function
= 1;
2381 if (context_stack_depth
> 0)
2383 new = pop_context ();
2384 /* Make a block for the local symbols within. */
2385 finish_block (new->name
, &local_symbols
, new->old_blocks
,
2386 new->start_addr
, valu
, objfile
);
2388 /* Stack must be empty now. */
2389 if (context_stack_depth
!= 0)
2390 complain (&lbrac_unmatched_complaint
, symnum
);
2392 new = push_context (0, valu
);
2393 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
2397 define_symbol (valu
, name
, desc
, type
, objfile
);
2403 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2404 for a bunch of other flags, too. Someday we may parse their
2405 flags; for now we ignore theirs and hope they'll ignore ours. */
2406 case N_OPT
: /* Solaris 2: Compiler options */
2409 if (STREQ (name
, GCC2_COMPILED_FLAG_SYMBOL
))
2411 processing_gcc_compilation
= 2;
2412 #if 1 /* Works, but is experimental. -fnf */
2413 if (AUTO_DEMANGLING
)
2415 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2424 /* The following symbol types can be ignored. */
2425 case N_OBJ
: /* Solaris 2: Object file dir and name */
2426 /* N_UNDF: Solaris 2: file separator mark */
2427 /* N_UNDF: -- we will never encounter it, since we only process one
2428 file's symbols at once. */
2429 case N_ENDM
: /* Solaris 2: End of module */
2430 case N_MAIN
: /* Name of main routine. */
2431 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2435 /* '#' is a GNU C extension to allow one symbol to refer to another
2438 Generally this is used so that an alias can refer to its main
2442 /* Initialize symbol reference names and determine if this is
2443 a definition. If symbol reference is being defined, go
2444 ahead and add it. Otherwise, just return sym. */
2449 /* If this stab defines a new reference ID that is not on the
2450 reference list, then put it on the reference list.
2452 We go ahead and advance NAME past the reference, even though
2453 it is not strictly necessary at this time. */
2454 refnum
= symbol_reference_defined (&s
);
2456 if (!ref_search (refnum
))
2457 ref_add (refnum
, 0, name
, valu
);
2462 previous_stab_code
= type
;
2465 /* FIXME: The only difference between this and elfstab_build_psymtabs
2466 is the call to install_minimal_symbols for elf, and the support for
2467 split sections. If the differences are really that small, the code
2468 should be shared. */
2470 /* Scan and build partial symbols for an coff symbol file.
2471 The coff file has already been processed to get its minimal symbols.
2473 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2476 OBJFILE is the object file we are reading symbols from.
2477 ADDR is the address relative to which the symbols are (e.g.
2478 the base address of the text segment).
2479 MAINLINE is true if we are reading the main symbol
2480 table (as opposed to a shared lib or dynamically loaded file).
2481 TEXTADDR is the address of the text section.
2482 TEXTSIZE is the size of the text section.
2483 STABSECTS is the list of .stab sections in OBJFILE.
2484 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2485 .stabstr section exists.
2487 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2488 adjusted for coff details. */
2491 coffstab_build_psymtabs (objfile
, mainline
,
2492 textaddr
, textsize
, stabsects
,
2493 stabstroffset
, stabstrsize
)
2494 struct objfile
*objfile
;
2497 unsigned int textsize
;
2498 struct stab_section_list
*stabsects
;
2499 file_ptr stabstroffset
;
2500 unsigned int stabstrsize
;
2503 bfd
*sym_bfd
= objfile
->obfd
;
2504 char *name
= bfd_get_filename (sym_bfd
);
2505 struct dbx_symfile_info
*info
;
2506 unsigned int stabsize
;
2508 /* There is already a dbx_symfile_info allocated by our caller.
2509 It might even contain some info from the coff symtab to help us. */
2510 info
= objfile
->sym_stab_info
;
2512 DBX_TEXT_ADDR (objfile
) = textaddr
;
2513 DBX_TEXT_SIZE (objfile
) = textsize
;
2515 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2516 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
2517 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2519 if (stabstrsize
> bfd_get_size (sym_bfd
))
2520 error ("ridiculous string table size: %d bytes", stabstrsize
);
2521 DBX_STRINGTAB (objfile
) = (char *)
2522 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+ 1);
2523 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
2525 /* Now read in the string table in one big gulp. */
2527 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2529 perror_with_name (name
);
2530 val
= bfd_read (DBX_STRINGTAB (objfile
), stabstrsize
, 1, sym_bfd
);
2531 if (val
!= stabstrsize
)
2532 perror_with_name (name
);
2534 stabsread_new_init ();
2535 buildsym_new_init ();
2536 free_header_files ();
2537 init_header_files ();
2539 processing_acc_compilation
= 1;
2541 /* In a coff file, we've already installed the minimal symbols that came
2542 from the coff (non-stab) symbol table, so always act like an
2543 incremental load here. */
2544 if (stabsects
->next
== NULL
)
2546 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
2547 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2548 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
2552 struct stab_section_list
*stabsect
;
2554 DBX_SYMCOUNT (objfile
) = 0;
2555 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
2557 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
2558 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2561 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
2563 symbuf_sections
= stabsects
->next
;
2564 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
2568 dbx_symfile_read (objfile
, 0);
2571 /* Scan and build partial symbols for an ELF symbol file.
2572 This ELF file has already been processed to get its minimal symbols,
2573 and any DWARF symbols that were in it.
2575 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2578 OBJFILE is the object file we are reading symbols from.
2579 ADDR is the address relative to which the symbols are (e.g.
2580 the base address of the text segment).
2581 MAINLINE is true if we are reading the main symbol
2582 table (as opposed to a shared lib or dynamically loaded file).
2583 STABOFFSET and STABSIZE define the location in OBJFILE where the .stab
2585 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2586 .stabstr section exists.
2588 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2589 adjusted for elf details. */
2592 elfstab_build_psymtabs (objfile
, mainline
,
2593 staboffset
, stabsize
,
2594 stabstroffset
, stabstrsize
)
2595 struct objfile
*objfile
;
2597 file_ptr staboffset
;
2598 unsigned int stabsize
;
2599 file_ptr stabstroffset
;
2600 unsigned int stabstrsize
;
2603 bfd
*sym_bfd
= objfile
->obfd
;
2604 char *name
= bfd_get_filename (sym_bfd
);
2605 struct dbx_symfile_info
*info
;
2607 /* There is already a dbx_symfile_info allocated by our caller.
2608 It might even contain some info from the ELF symtab to help us. */
2609 info
= objfile
->sym_stab_info
;
2611 /* Find the first and last text address. dbx_symfile_read seems to
2613 find_text_range (sym_bfd
, objfile
);
2615 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2616 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
2617 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2618 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2619 DBX_SYMTAB_OFFSET (objfile
) = staboffset
;
2621 if (stabstrsize
> bfd_get_size (sym_bfd
))
2622 error ("ridiculous string table size: %d bytes", stabstrsize
);
2623 DBX_STRINGTAB (objfile
) = (char *)
2624 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+ 1);
2625 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
2627 /* Now read in the string table in one big gulp. */
2629 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2631 perror_with_name (name
);
2632 val
= bfd_read (DBX_STRINGTAB (objfile
), stabstrsize
, 1, sym_bfd
);
2633 if (val
!= stabstrsize
)
2634 perror_with_name (name
);
2636 stabsread_new_init ();
2637 buildsym_new_init ();
2638 free_header_files ();
2639 init_header_files ();
2640 install_minimal_symbols (objfile
);
2642 processing_acc_compilation
= 1;
2644 /* In an elf file, we've already installed the minimal symbols that came
2645 from the elf (non-stab) symbol table, so always act like an
2646 incremental load here. */
2647 dbx_symfile_read (objfile
, 0);
2650 /* Scan and build partial symbols for a file with special sections for stabs
2651 and stabstrings. The file has already been processed to get its minimal
2652 symbols, and any other symbols that might be necessary to resolve GSYMs.
2654 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2657 OBJFILE is the object file we are reading symbols from.
2658 ADDR is the address relative to which the symbols are (e.g. the base address
2659 of the text segment).
2660 MAINLINE is true if we are reading the main symbol table (as opposed to a
2661 shared lib or dynamically loaded file).
2662 STAB_NAME is the name of the section that contains the stabs.
2663 STABSTR_NAME is the name of the section that contains the stab strings.
2665 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
2668 stabsect_build_psymtabs (objfile
, mainline
, stab_name
,
2669 stabstr_name
, text_name
)
2670 struct objfile
*objfile
;
2677 bfd
*sym_bfd
= objfile
->obfd
;
2678 char *name
= bfd_get_filename (sym_bfd
);
2680 asection
*stabstrsect
;
2681 asection
*text_sect
;
2683 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
2684 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
2690 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
2691 stab_name
, stabstr_name
);
2693 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
2694 xmalloc (sizeof (struct dbx_symfile_info
));
2695 memset (objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
2697 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
2699 error ("Can't find %s section in symbol file", text_name
);
2700 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
2701 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
2703 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
2704 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
2705 / DBX_SYMBOL_SIZE (objfile
);
2706 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
2707 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
2709 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
2710 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile
));
2711 DBX_STRINGTAB (objfile
) = (char *)
2712 obstack_alloc (&objfile
->psymbol_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
2713 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
2715 /* Now read in the string table in one big gulp. */
2717 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
2718 stabstrsect
, /* bfd section */
2719 DBX_STRINGTAB (objfile
), /* input buffer */
2720 0, /* offset into section */
2721 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
2724 perror_with_name (name
);
2726 stabsread_new_init ();
2727 buildsym_new_init ();
2728 free_header_files ();
2729 init_header_files ();
2730 install_minimal_symbols (objfile
);
2732 /* Now, do an incremental load */
2734 processing_acc_compilation
= 1;
2735 dbx_symfile_read (objfile
, 0);
2738 static struct sym_fns aout_sym_fns
=
2740 bfd_target_aout_flavour
,
2741 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2742 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2743 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
2744 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
2745 default_symfile_offsets
, /* sym_offsets: parse user's offsets to internal form */
2746 NULL
/* next: pointer to next struct sym_fns */
2750 _initialize_dbxread ()
2752 add_symtab_fns (&aout_sym_fns
);