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 (objfile
);
492 bfd_section
= DBX_TEXT_SECTION (objfile
);
496 section
= SECT_OFF_DATA (objfile
);
497 bfd_section
= DBX_DATA_SECTION (objfile
);
501 section
= SECT_OFF_BSS (objfile
);
502 bfd_section
= DBX_BSS_SECTION (objfile
);
512 section
= SECT_OFF_DATA (objfile
);
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 (objfile
);
521 bfd_section
= DBX_DATA_SECTION (objfile
);
528 ms_type
= mst_file_text
;
529 section
= SECT_OFF_TEXT (objfile
);
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 (objfile
);
551 bfd_section
= DBX_DATA_SECTION (objfile
);
554 ms_type
= mst_file_bss
;
555 section
= SECT_OFF_BSS (objfile
);
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
), "epoc-pe", 7))
608 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
610 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
612 perror_with_name (objfile
->name
);
614 /* If we are reinitializing, or if we have never loaded syms yet, init */
616 || objfile
->global_psymbols
.size
== 0
617 || objfile
->static_psymbols
.size
== 0)
618 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
620 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
621 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
623 free_pending_blocks ();
624 back_to
= make_cleanup (really_free_pendings
, 0);
626 init_minimal_symbol_collection ();
627 make_cleanup ((make_cleanup_func
) discard_minimal_symbols
, 0);
629 /* Read stabs data from executable file and define symbols. */
631 read_dbx_symtab (objfile
);
633 /* Add the dynamic symbols. */
635 read_dbx_dynamic_symtab (objfile
);
637 /* Install any minimal symbols that have been collected as the current
638 minimal symbols for this objfile. */
640 install_minimal_symbols (objfile
);
642 do_cleanups (back_to
);
645 /* Initialize anything that needs initializing when a completely new
646 symbol file is specified (not just adding some symbols from another
647 file, e.g. a shared library). */
650 dbx_new_init (ignore
)
651 struct objfile
*ignore
;
653 stabsread_new_init ();
654 buildsym_new_init ();
655 init_header_files ();
659 /* dbx_symfile_init ()
660 is the dbx-specific initialization routine for reading symbols.
661 It is passed a struct objfile which contains, among other things,
662 the BFD for the file whose symbols are being read, and a slot for a pointer
663 to "private data" which we fill with goodies.
665 We read the string table into malloc'd space and stash a pointer to it.
667 Since BFD doesn't know how to read debug symbols in a format-independent
668 way (and may never do so...), we have to do it ourselves. We will never
669 be called unless this is an a.out (or very similar) file.
670 FIXME, there should be a cleaner peephole into the BFD environment here. */
672 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
675 dbx_symfile_init (objfile
)
676 struct objfile
*objfile
;
679 bfd
*sym_bfd
= objfile
->obfd
;
680 char *name
= bfd_get_filename (sym_bfd
);
682 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
684 /* Allocate struct to keep track of the symfile */
685 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
686 xmmalloc (objfile
->md
, sizeof (struct dbx_symfile_info
));
687 memset ((PTR
) objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
689 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
690 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
691 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
693 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
694 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
695 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
697 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
699 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
701 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
703 error ("Can't find .text section in symbol file");
704 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
705 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
707 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
708 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
709 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
711 /* Read the string table and stash it away in the psymbol_obstack. It is
712 only needed as long as we need to expand psymbols into full symbols,
713 so when we blow away the psymbol the string table goes away as well.
714 Note that gdb used to use the results of attempting to malloc the
715 string table, based on the size it read, as a form of sanity check
716 for botched byte swapping, on the theory that a byte swapped string
717 table size would be so totally bogus that the malloc would fail. Now
718 that we put in on the psymbol_obstack, we can't do this since gdb gets
719 a fatal error (out of virtual memory) if the size is bogus. We can
720 however at least check to see if the size is less than the size of
721 the size field itself, or larger than the size of the entire file.
722 Note that all valid string tables have a size greater than zero, since
723 the bytes used to hold the size are included in the count. */
725 if (STRING_TABLE_OFFSET
== 0)
727 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
728 will never be zero, even when there is no string table. This
729 would appear to be a bug in bfd. */
730 DBX_STRINGTAB_SIZE (objfile
) = 0;
731 DBX_STRINGTAB (objfile
) = NULL
;
735 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
737 perror_with_name (name
);
739 memset ((PTR
) size_temp
, 0, sizeof (size_temp
));
740 val
= bfd_read ((PTR
) size_temp
, sizeof (size_temp
), 1, sym_bfd
);
743 perror_with_name (name
);
747 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
748 EOF if there is no string table, and attempting to read the size
749 from EOF will read zero bytes. */
750 DBX_STRINGTAB_SIZE (objfile
) = 0;
751 DBX_STRINGTAB (objfile
) = NULL
;
755 /* Read some data that would appear to be the string table size.
756 If there really is a string table, then it is probably the right
757 size. Byteswap if necessary and validate the size. Note that
758 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
759 random data that happened to be at STRING_TABLE_OFFSET, because
760 bfd can't tell us there is no string table, the sanity checks may
761 or may not catch this. */
762 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
764 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
765 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
766 error ("ridiculous string table size (%d bytes).",
767 DBX_STRINGTAB_SIZE (objfile
));
769 DBX_STRINGTAB (objfile
) =
770 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
771 DBX_STRINGTAB_SIZE (objfile
));
772 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
774 /* Now read in the string table in one big gulp. */
776 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
778 perror_with_name (name
);
779 val
= bfd_read (DBX_STRINGTAB (objfile
), DBX_STRINGTAB_SIZE (objfile
), 1,
781 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
782 perror_with_name (name
);
787 /* Perform any local cleanups required when we are done with a particular
788 objfile. I.E, we are in the process of discarding all symbol information
789 for an objfile, freeing up all memory held for it, and unlinking the
790 objfile struct from the global list of known objfiles. */
793 dbx_symfile_finish (objfile
)
794 struct objfile
*objfile
;
796 if (objfile
->sym_stab_info
!= NULL
)
798 if (HEADER_FILES (objfile
) != NULL
)
800 register int i
= N_HEADER_FILES (objfile
);
801 register struct header_file
*hfiles
= HEADER_FILES (objfile
);
805 free (hfiles
[i
].name
);
806 free (hfiles
[i
].vector
);
810 mfree (objfile
->md
, objfile
->sym_stab_info
);
812 free_header_files ();
816 /* Buffer for reading the symbol table entries. */
817 static struct external_nlist symbuf
[4096];
818 static int symbuf_idx
;
819 static int symbuf_end
;
821 /* cont_elem is used for continuing information in cfront.
822 It saves information about which types need to be fixed up and
823 completed after all the stabs are read. */
826 /* sym and stabsstring for continuing information in cfront */
829 /* state dependancies (statics that must be preserved) */
833 int (*func
) PARAMS ((struct objfile
*, struct symbol
*, char *));
834 /* other state dependancies include:
835 (assumption is that these will not change since process_now FIXME!!)
842 static struct cont_elem
*cont_list
= 0;
843 static int cont_limit
= 0;
844 static int cont_count
= 0;
846 /* Arrange for function F to be called with arguments SYM and P later
847 in the stabs reading process. */
849 process_later (sym
, p
, f
)
852 int (*f
) PARAMS ((struct objfile
*, struct symbol
*, char *));
855 /* Allocate more space for the deferred list. */
856 if (cont_count
>= cont_limit
- 1)
858 cont_limit
+= 32; /* chunk size */
861 = (struct cont_elem
*) xrealloc (cont_list
,
863 * sizeof (struct cont_elem
)));
865 error ("Virtual memory exhausted\n");
868 /* Save state variables so we can process these stabs later. */
869 cont_list
[cont_count
].sym_idx
= symbuf_idx
;
870 cont_list
[cont_count
].sym_end
= symbuf_end
;
871 cont_list
[cont_count
].symnum
= symnum
;
872 cont_list
[cont_count
].sym
= sym
;
873 cont_list
[cont_count
].stabs
= p
;
874 cont_list
[cont_count
].func
= f
;
878 /* Call deferred funtions in CONT_LIST. */
881 process_now (objfile
)
882 struct objfile
*objfile
;
891 int (*func
) PARAMS ((struct objfile
*, struct symbol
*, char *));
893 /* Save the state of our caller, we'll want to restore it before
895 save_symbuf_idx
= symbuf_idx
;
896 save_symbuf_end
= symbuf_end
;
897 save_symnum
= symnum
;
899 /* Iterate over all the deferred stabs. */
900 for (i
= 0; i
< cont_count
; i
++)
902 /* Restore the state for this deferred stab. */
903 symbuf_idx
= cont_list
[i
].sym_idx
;
904 symbuf_end
= cont_list
[i
].sym_end
;
905 symnum
= cont_list
[i
].symnum
;
906 sym
= cont_list
[i
].sym
;
907 stabs
= cont_list
[i
].stabs
;
908 func
= cont_list
[i
].func
;
910 /* Call the function to handle this deferrd stab. */
911 err
= (*func
) (objfile
, sym
, stabs
);
913 error ("Internal error: unable to resolve stab.\n");
916 /* Restore our caller's state. */
917 symbuf_idx
= save_symbuf_idx
;
918 symbuf_end
= save_symbuf_end
;
919 symnum
= save_symnum
;
924 /* Name of last function encountered. Used in Solaris to approximate
925 object file boundaries. */
926 static char *last_function_name
;
928 /* The address in memory of the string table of the object file we are
929 reading (which might not be the "main" object file, but might be a
930 shared library or some other dynamically loaded thing). This is
931 set by read_dbx_symtab when building psymtabs, and by
932 read_ofile_symtab when building symtabs, and is used only by
933 next_symbol_text. FIXME: If that is true, we don't need it when
934 building psymtabs, right? */
935 static char *stringtab_global
;
937 /* These variables are used to control fill_symbuf when the stabs
938 symbols are not contiguous (as may be the case when a COFF file is
939 linked using --split-by-reloc). */
940 static struct stab_section_list
*symbuf_sections
;
941 static unsigned int symbuf_left
;
942 static unsigned int symbuf_read
;
944 /* Refill the symbol table input buffer
945 and set the variables that control fetching entries from it.
946 Reports an error if no data available.
947 This function can read past the end of the symbol table
948 (into the string table) but this does no harm. */
951 fill_symbuf (sym_bfd
)
957 if (symbuf_sections
== NULL
)
958 count
= sizeof (symbuf
);
961 if (symbuf_left
<= 0)
963 file_ptr filepos
= symbuf_sections
->section
->filepos
;
964 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
965 perror_with_name (bfd_get_filename (sym_bfd
));
966 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
967 symbol_table_offset
= filepos
- symbuf_read
;
968 symbuf_sections
= symbuf_sections
->next
;
972 if (count
> sizeof (symbuf
))
973 count
= sizeof (symbuf
);
976 nbytes
= bfd_read ((PTR
) symbuf
, count
, 1, sym_bfd
);
978 perror_with_name (bfd_get_filename (sym_bfd
));
979 else if (nbytes
== 0)
980 error ("Premature end of file reading symbol table");
981 symbuf_end
= nbytes
/ symbol_size
;
983 symbuf_left
-= nbytes
;
984 symbuf_read
+= nbytes
;
987 #define SWAP_SYMBOL(symp, abfd) \
989 (symp)->n_strx = bfd_h_get_32(abfd, \
990 (unsigned char *)&(symp)->n_strx); \
991 (symp)->n_desc = bfd_h_get_16 (abfd, \
992 (unsigned char *)&(symp)->n_desc); \
993 (symp)->n_value = bfd_h_get_32 (abfd, \
994 (unsigned char *)&(symp)->n_value); \
997 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
999 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
1000 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
1001 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
1002 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
1005 /* Invariant: The symbol pointed to by symbuf_idx is the first one
1006 that hasn't been swapped. Swap the symbol at the same time
1007 that symbuf_idx is incremented. */
1009 /* dbx allows the text of a symbol name to be continued into the
1010 next symbol name! When such a continuation is encountered
1011 (a \ at the end of the text of a name)
1012 call this function to get the continuation. */
1015 dbx_next_symbol_text (objfile
)
1016 struct objfile
*objfile
;
1018 struct internal_nlist nlist
;
1020 if (symbuf_idx
== symbuf_end
)
1021 fill_symbuf (symfile_bfd
);
1024 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
1025 OBJSTAT (objfile
, n_stabs
++);
1029 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
1032 /* Initialize the list of bincls to contain none and have some
1036 init_bincl_list (number
, objfile
)
1038 struct objfile
*objfile
;
1040 bincls_allocated
= number
;
1041 next_bincl
= bincl_list
= (struct header_file_location
*)
1042 xmmalloc (objfile
->md
, bincls_allocated
* sizeof (struct header_file_location
));
1045 /* Add a bincl to the list. */
1048 add_bincl_to_list (pst
, name
, instance
)
1049 struct partial_symtab
*pst
;
1053 if (next_bincl
>= bincl_list
+ bincls_allocated
)
1055 int offset
= next_bincl
- bincl_list
;
1056 bincls_allocated
*= 2;
1057 bincl_list
= (struct header_file_location
*)
1058 xmrealloc (pst
->objfile
->md
, (char *) bincl_list
,
1059 bincls_allocated
* sizeof (struct header_file_location
));
1060 next_bincl
= bincl_list
+ offset
;
1062 next_bincl
->pst
= pst
;
1063 next_bincl
->instance
= instance
;
1064 next_bincl
++->name
= name
;
1067 /* Given a name, value pair, find the corresponding
1068 bincl in the list. Return the partial symtab associated
1069 with that header_file_location. */
1071 static struct partial_symtab
*
1072 find_corresponding_bincl_psymtab (name
, instance
)
1076 struct header_file_location
*bincl
;
1078 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
1079 if (bincl
->instance
== instance
1080 && STREQ (name
, bincl
->name
))
1083 complain (&repeated_header_complaint
, name
, symnum
);
1084 return (struct partial_symtab
*) 0;
1087 /* Free the storage allocated for the bincl list. */
1090 free_bincl_list (objfile
)
1091 struct objfile
*objfile
;
1093 mfree (objfile
->md
, (PTR
) bincl_list
);
1094 bincls_allocated
= 0;
1097 /* Scan a SunOs dynamic symbol table for symbols of interest and
1098 add them to the minimal symbol table. */
1101 read_dbx_dynamic_symtab (objfile
)
1102 struct objfile
*objfile
;
1104 bfd
*abfd
= objfile
->obfd
;
1105 struct cleanup
*back_to
;
1115 CORE_ADDR sym_value
;
1118 /* Check that the symbol file has dynamic symbols that we know about.
1119 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1120 on a sun4 host (and vice versa) and bfd is not configured
1121 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1122 so we ignore the dynamic symbols in this case. */
1123 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1124 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1125 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1128 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1129 if (dynsym_size
< 0)
1132 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1133 back_to
= make_cleanup (free
, dynsyms
);
1135 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1136 if (dynsym_count
< 0)
1138 do_cleanups (back_to
);
1142 /* Enter dynamic symbols into the minimal symbol table
1143 if this is a stripped executable. */
1144 if (bfd_get_symcount (abfd
) <= 0)
1147 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1149 asymbol
*sym
= *symptr
;
1153 sec
= bfd_get_section (sym
);
1155 /* BFD symbols are section relative. */
1156 sym_value
= sym
->value
+ sec
->vma
;
1158 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1160 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1163 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1165 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1168 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1170 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS (objfile
));
1176 if (sym
->flags
& BSF_GLOBAL
)
1179 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1184 /* Symbols from shared libraries have a dynamic relocation entry
1185 that points to the associated slot in the procedure linkage table.
1186 We make a mininal symbol table entry with type mst_solib_trampoline
1187 at the address in the procedure linkage table. */
1188 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1189 if (dynrel_size
< 0)
1191 do_cleanups (back_to
);
1195 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1196 make_cleanup (free
, dynrels
);
1198 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1199 if (dynrel_count
< 0)
1201 do_cleanups (back_to
);
1205 for (counter
= 0, relptr
= dynrels
;
1206 counter
< dynrel_count
;
1207 counter
++, relptr
++)
1209 arelent
*rel
= *relptr
;
1211 rel
->address
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1213 switch (bfd_get_arch (abfd
))
1215 case bfd_arch_sparc
:
1216 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1220 /* `16' is the type BFD produces for a jump table relocation. */
1221 if (rel
->howto
->type
!= 16)
1224 /* Adjust address in the jump table to point to
1225 the start of the bsr instruction. */
1232 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1233 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1237 do_cleanups (back_to
);
1240 /* Setup partial_symtab's describing each source file for which
1241 debugging information is available. */
1244 read_dbx_symtab (objfile
)
1245 struct objfile
*objfile
;
1247 register struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1248 struct internal_nlist nlist
;
1249 CORE_ADDR text_addr
;
1252 register char *namestring
;
1254 int past_first_source_file
= 0;
1255 CORE_ADDR last_o_file_start
= 0;
1256 CORE_ADDR last_function_start
= 0;
1257 struct cleanup
*back_to
;
1259 int textlow_not_set
;
1261 /* Current partial symtab */
1262 struct partial_symtab
*pst
;
1264 /* List of current psymtab's include files */
1265 char **psymtab_include_list
;
1266 int includes_allocated
;
1269 /* Index within current psymtab dependency list */
1270 struct partial_symtab
**dependency_list
;
1271 int dependencies_used
, dependencies_allocated
;
1273 text_addr
= DBX_TEXT_ADDR (objfile
);
1274 text_size
= DBX_TEXT_SIZE (objfile
);
1276 /* FIXME. We probably want to change stringtab_global rather than add this
1277 while processing every symbol entry. FIXME. */
1278 file_string_table_offset
= 0;
1279 next_file_string_table_offset
= 0;
1281 stringtab_global
= DBX_STRINGTAB (objfile
);
1283 pst
= (struct partial_symtab
*) 0;
1285 includes_allocated
= 30;
1287 psymtab_include_list
= (char **) alloca (includes_allocated
*
1290 dependencies_allocated
= 30;
1291 dependencies_used
= 0;
1293 (struct partial_symtab
**) alloca (dependencies_allocated
*
1294 sizeof (struct partial_symtab
*));
1296 /* Init bincl list */
1297 init_bincl_list (20, objfile
);
1298 back_to
= make_cleanup ((make_cleanup_func
) free_bincl_list
, objfile
);
1300 last_source_file
= NULL
;
1302 lowest_text_address
= (CORE_ADDR
) -1;
1304 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1305 abfd
= objfile
->obfd
;
1306 symbuf_end
= symbuf_idx
= 0;
1307 next_symbol_text_func
= dbx_next_symbol_text
;
1308 textlow_not_set
= 1;
1309 has_line_numbers
= 0;
1311 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1313 /* Get the symbol for this run and pull out some info */
1314 QUIT
; /* allow this to be interruptable */
1315 if (symbuf_idx
== symbuf_end
)
1317 bufp
= &symbuf
[symbuf_idx
++];
1320 * Special case to speed up readin.
1322 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1324 has_line_numbers
= 1;
1328 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1329 OBJSTAT (objfile
, n_stabs
++);
1331 /* Ok. There is a lot of code duplicated in the rest of this
1332 switch statement (for efficiency reasons). Since I don't
1333 like duplicating code, I will do my penance here, and
1334 describe the code which is duplicated:
1336 *) The assignment to namestring.
1337 *) The call to strchr.
1338 *) The addition of a partial symbol the the two partial
1339 symbol lists. This last is a large section of code, so
1340 I've imbedded it in the following macro.
1343 /* Set namestring based on nlist. If the string table index is invalid,
1344 give a fake name, and print a single error message per symbol file read,
1345 rather than abort the symbol reading or flood the user with messages. */
1347 /*FIXME: Too many adds and indirections in here for the inner loop. */
1348 #define SET_NAMESTRING()\
1349 if (((unsigned)CUR_SYMBOL_STRX + file_string_table_offset) >= \
1350 DBX_STRINGTAB_SIZE (objfile)) { \
1351 complain (&string_table_offset_complaint, symnum); \
1352 namestring = "<bad string table offset>"; \
1354 namestring = CUR_SYMBOL_STRX + file_string_table_offset + \
1355 DBX_STRINGTAB (objfile)
1357 #define CUR_SYMBOL_TYPE nlist.n_type
1358 #define CUR_SYMBOL_VALUE nlist.n_value
1359 #define CUR_SYMBOL_STRX nlist.n_strx
1360 #define DBXREAD_ONLY
1361 #define START_PSYMTAB(ofile,fname,low,symoff,global_syms,static_syms)\
1362 start_psymtab(ofile, fname, low, symoff, global_syms, static_syms)
1363 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\
1364 end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)
1366 #include "partial-stab.h"
1369 /* If there's stuff to be cleaned up, clean it up. */
1370 if (DBX_SYMCOUNT (objfile
) > 0 /* We have some syms */
1371 /*FIXME, does this have a bug at start address 0? */
1372 && last_o_file_start
1373 && objfile
->ei
.entry_point
< nlist
.n_value
1374 && objfile
->ei
.entry_point
>= last_o_file_start
)
1376 objfile
->ei
.entry_file_lowpc
= last_o_file_start
;
1377 objfile
->ei
.entry_file_highpc
= nlist
.n_value
;
1382 /* Don't set pst->texthigh lower than it already is. */
1383 CORE_ADDR text_end
=
1384 (lowest_text_address
== (CORE_ADDR
) -1
1385 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)))
1386 : lowest_text_address
)
1389 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1390 symnum
* symbol_size
,
1391 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
1392 dependency_list
, dependencies_used
, textlow_not_set
);
1395 do_cleanups (back_to
);
1398 /* Allocate and partially fill a partial symtab. It will be
1399 completely filled at the end of the symbol list.
1401 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1402 is the address relative to which its symbols are (incremental) or 0
1406 static struct partial_symtab
*
1407 start_psymtab (objfile
, filename
, textlow
, ldsymoff
, global_syms
, static_syms
)
1408 struct objfile
*objfile
;
1412 struct partial_symbol
**global_syms
;
1413 struct partial_symbol
**static_syms
;
1415 struct partial_symtab
*result
=
1416 start_psymtab_common (objfile
, objfile
->section_offsets
,
1417 filename
, textlow
, global_syms
, static_syms
);
1419 result
->read_symtab_private
= (char *)
1420 obstack_alloc (&objfile
->psymbol_obstack
, sizeof (struct symloc
));
1421 LDSYMOFF (result
) = ldsymoff
;
1422 result
->read_symtab
= dbx_psymtab_to_symtab
;
1423 SYMBOL_SIZE (result
) = symbol_size
;
1424 SYMBOL_OFFSET (result
) = symbol_table_offset
;
1425 STRING_OFFSET (result
) = string_table_offset
;
1426 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
1428 /* If we're handling an ELF file, drag some section-relocation info
1429 for this source file out of the ELF symbol table, to compensate for
1430 Sun brain death. This replaces the section_offsets in this psymtab,
1432 elfstab_offset_sections (objfile
, result
);
1434 /* Deduce the source language from the filename for this psymtab. */
1435 psymtab_language
= deduce_language_from_filename (filename
);
1440 /* Close off the current usage of PST.
1441 Returns PST or NULL if the partial symtab was empty and thrown away.
1443 FIXME: List variables and peculiarities of same. */
1445 struct partial_symtab
*
1446 end_psymtab (pst
, include_list
, num_includes
, capping_symbol_offset
,
1447 capping_text
, dependency_list
, number_dependencies
, textlow_not_set
)
1448 struct partial_symtab
*pst
;
1449 char **include_list
;
1451 int capping_symbol_offset
;
1452 CORE_ADDR capping_text
;
1453 struct partial_symtab
**dependency_list
;
1454 int number_dependencies
;
1455 int textlow_not_set
;
1458 struct objfile
*objfile
= pst
->objfile
;
1460 if (capping_symbol_offset
!= -1)
1461 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
1462 pst
->texthigh
= capping_text
;
1464 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1465 /* Under Solaris, the N_SO symbols always have a value of 0,
1466 instead of the usual address of the .o file. Therefore,
1467 we have to do some tricks to fill in texthigh and textlow.
1468 The first trick is in partial-stab.h: if we see a static
1469 or global function, and the textlow for the current pst
1470 is not set (ie: textlow_not_set), then we use that function's
1471 address for the textlow of the pst. */
1473 /* Now, to fill in texthigh, we remember the last function seen
1474 in the .o file (also in partial-stab.h). Also, there's a hack in
1475 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1476 to here via the misc_info field. Therefore, we can fill in
1477 a reliable texthigh by taking the address plus size of the
1478 last function in the file. */
1480 if (pst
->texthigh
== 0 && last_function_name
)
1484 struct minimal_symbol
*minsym
;
1486 p
= strchr (last_function_name
, ':');
1488 p
= last_function_name
;
1489 n
= p
- last_function_name
;
1491 strncpy (p
, last_function_name
, n
);
1494 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
1497 /* Sun Fortran appends an underscore to the minimal symbol name,
1498 try again with an appended underscore if the minimal symbol
1502 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
1506 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
1508 last_function_name
= NULL
;
1511 /* this test will be true if the last .o file is only data */
1512 if (textlow_not_set
)
1513 pst
->textlow
= pst
->texthigh
;
1516 struct partial_symtab
*p1
;
1518 /* If we know our own starting text address, then walk through all other
1519 psymtabs for this objfile, and if any didn't know their ending text
1520 address, set it to our starting address. Take care to not set our
1521 own ending address to our starting address, nor to set addresses on
1522 `dependency' files that have both textlow and texthigh zero. */
1524 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
1526 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
1528 p1
->texthigh
= pst
->textlow
;
1529 /* if this file has only data, then make textlow match texthigh */
1530 if (p1
->textlow
== 0)
1531 p1
->textlow
= p1
->texthigh
;
1536 /* End of kludge for patching Solaris textlow and texthigh. */
1537 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
1539 pst
->n_global_syms
=
1540 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1541 pst
->n_static_syms
=
1542 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1544 pst
->number_of_dependencies
= number_dependencies
;
1545 if (number_dependencies
)
1547 pst
->dependencies
= (struct partial_symtab
**)
1548 obstack_alloc (&objfile
->psymbol_obstack
,
1549 number_dependencies
* sizeof (struct partial_symtab
*));
1550 memcpy (pst
->dependencies
, dependency_list
,
1551 number_dependencies
* sizeof (struct partial_symtab
*));
1554 pst
->dependencies
= 0;
1556 for (i
= 0; i
< num_includes
; i
++)
1558 struct partial_symtab
*subpst
=
1559 allocate_psymtab (include_list
[i
], objfile
);
1561 /* Copy the sesction_offsets array from the main psymtab. */
1562 subpst
->section_offsets
= pst
->section_offsets
;
1563 subpst
->read_symtab_private
=
1564 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
1565 sizeof (struct symloc
));
1569 subpst
->texthigh
= 0;
1571 /* We could save slight bits of space by only making one of these,
1572 shared by the entire set of include files. FIXME-someday. */
1573 subpst
->dependencies
= (struct partial_symtab
**)
1574 obstack_alloc (&objfile
->psymbol_obstack
,
1575 sizeof (struct partial_symtab
*));
1576 subpst
->dependencies
[0] = pst
;
1577 subpst
->number_of_dependencies
= 1;
1579 subpst
->globals_offset
=
1580 subpst
->n_global_syms
=
1581 subpst
->statics_offset
=
1582 subpst
->n_static_syms
= 0;
1586 subpst
->read_symtab
= pst
->read_symtab
;
1589 sort_pst_symbols (pst
);
1591 /* If there is already a psymtab or symtab for a file of this name, remove it.
1592 (If there is a symtab, more drastic things also happen.)
1593 This happens in VxWorks. */
1594 free_named_symtabs (pst
->filename
);
1596 if (num_includes
== 0
1597 && number_dependencies
== 0
1598 && pst
->n_global_syms
== 0
1599 && pst
->n_static_syms
== 0
1600 && has_line_numbers
== 0)
1602 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1603 it is on the obstack, but we can forget to chain it on the list. */
1604 /* Empty psymtabs happen as a result of header files which don't have
1605 any symbols in them. There can be a lot of them. But this check
1606 is wrong, in that a psymtab with N_SLINE entries but nothing else
1607 is not empty, but we don't realize that. Fixing that without slowing
1608 things down might be tricky. */
1610 discard_psymtab (pst
);
1612 /* Indicate that psymtab was thrown away. */
1613 pst
= (struct partial_symtab
*) NULL
;
1619 dbx_psymtab_to_symtab_1 (pst
)
1620 struct partial_symtab
*pst
;
1622 struct cleanup
*old_chain
;
1630 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1635 /* Read in all partial symtabs on which this one is dependent */
1636 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1637 if (!pst
->dependencies
[i
]->readin
)
1639 /* Inform about additional files that need to be read in. */
1642 fputs_filtered (" ", gdb_stdout
);
1644 fputs_filtered ("and ", gdb_stdout
);
1646 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1647 wrap_here (""); /* Flush output */
1648 gdb_flush (gdb_stdout
);
1650 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1653 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy */
1655 /* Init stuff necessary for reading in symbols */
1658 old_chain
= make_cleanup (really_free_pendings
, 0);
1659 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
1660 symbol_size
= SYMBOL_SIZE (pst
);
1662 /* Read in this file's symbols */
1663 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
1664 read_ofile_symtab (pst
);
1665 sort_symtab_syms (pst
->symtab
);
1667 do_cleanups (old_chain
);
1673 /* Read in all of the symbols for a given psymtab for real.
1674 Be verbose about it if the user wants that. */
1677 dbx_psymtab_to_symtab (pst
)
1678 struct partial_symtab
*pst
;
1687 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1692 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
1694 /* Print the message now, before reading the string table,
1695 to avoid disconcerting pauses. */
1698 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1699 gdb_flush (gdb_stdout
);
1702 sym_bfd
= pst
->objfile
->obfd
;
1704 next_symbol_text_func
= dbx_next_symbol_text
;
1706 dbx_psymtab_to_symtab_1 (pst
);
1708 /* Match with global symbols. This only needs to be done once,
1709 after all of the symtabs and dependencies have been read in. */
1710 scan_file_globals (pst
->objfile
);
1712 /* Finish up the debug error message. */
1714 printf_filtered ("done.\n");
1718 /* Read in a defined section of a specific object file's symbols. */
1721 read_ofile_symtab (pst
)
1722 struct partial_symtab
*pst
;
1724 register char *namestring
;
1725 register struct external_nlist
*bufp
;
1726 struct internal_nlist nlist
;
1728 unsigned max_symnum
;
1730 struct objfile
*objfile
;
1731 int sym_offset
; /* Offset to start of symbols to read */
1732 int sym_size
; /* Size of symbols to read */
1733 CORE_ADDR text_offset
; /* Start of text segment for symbols */
1734 int text_size
; /* Size of text segment for symbols */
1735 struct section_offsets
*section_offsets
;
1737 objfile
= pst
->objfile
;
1738 sym_offset
= LDSYMOFF (pst
);
1739 sym_size
= LDSYMLEN (pst
);
1740 text_offset
= pst
->textlow
;
1741 text_size
= pst
->texthigh
- pst
->textlow
;
1742 /* This cannot be simply objfile->section_offsets because of
1743 elfstab_offset_sections() which initializes the psymtab section
1744 offsets information in a special way, and that is different from
1745 objfile->section_offsets. */
1746 section_offsets
= pst
->section_offsets
;
1748 current_objfile
= objfile
;
1749 subfile_stack
= NULL
;
1751 stringtab_global
= DBX_STRINGTAB (objfile
);
1752 last_source_file
= NULL
;
1754 abfd
= objfile
->obfd
;
1755 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
1756 symbuf_end
= symbuf_idx
= 0;
1758 /* It is necessary to actually read one symbol *before* the start
1759 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1760 occurs before the N_SO symbol.
1762 Detecting this in read_dbx_symtab
1763 would slow down initial readin, so we look for it here instead. */
1764 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
1766 bfd_seek (symfile_bfd
, sym_offset
- symbol_size
, SEEK_CUR
);
1768 bufp
= &symbuf
[symbuf_idx
++];
1769 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1770 OBJSTAT (objfile
, n_stabs
++);
1774 processing_gcc_compilation
= 0;
1775 if (nlist
.n_type
== N_TEXT
)
1777 const char *tempstring
= namestring
;
1779 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1780 processing_gcc_compilation
= 1;
1781 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1782 processing_gcc_compilation
= 2;
1783 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
1785 if (STREQN (tempstring
, "__gnu_compiled", 14))
1786 processing_gcc_compilation
= 2;
1789 /* Try to select a C++ demangling based on the compilation unit
1792 if (processing_gcc_compilation
)
1794 if (AUTO_DEMANGLING
)
1796 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1802 /* The N_SO starting this symtab is the first symbol, so we
1803 better not check the symbol before it. I'm not this can
1804 happen, but it doesn't hurt to check for it. */
1805 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
1806 processing_gcc_compilation
= 0;
1809 if (symbuf_idx
== symbuf_end
)
1811 bufp
= &symbuf
[symbuf_idx
];
1812 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
1813 error ("First symbol in segment of executable not a source symbol");
1815 max_symnum
= sym_size
/ symbol_size
;
1818 symnum
< max_symnum
;
1821 QUIT
; /* Allow this to be interruptable */
1822 if (symbuf_idx
== symbuf_end
)
1824 bufp
= &symbuf
[symbuf_idx
++];
1825 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1826 OBJSTAT (objfile
, n_stabs
++);
1828 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
1834 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
1835 namestring
, section_offsets
, objfile
);
1837 /* We skip checking for a new .o or -l file; that should never
1838 happen in this routine. */
1839 else if (type
== N_TEXT
)
1841 /* I don't think this code will ever be executed, because
1842 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1843 the N_SO symbol which starts this source file.
1844 However, there is no reason not to accept
1845 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1847 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1848 processing_gcc_compilation
= 1;
1849 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1850 processing_gcc_compilation
= 2;
1852 if (AUTO_DEMANGLING
)
1854 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1857 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
1858 || type
== (unsigned char) N_NBTEXT
1861 /* Global symbol: see if we came across a dbx defintion for
1862 a corresponding symbol. If so, store the value. Remove
1863 syms from the chain when their values are stored, but
1864 search the whole chain, as there may be several syms from
1865 different files with the same name. */
1866 /* This is probably not true. Since the files will be read
1867 in one at a time, each reference to a global symbol will
1868 be satisfied in each file as it appears. So we skip this
1874 current_objfile
= NULL
;
1876 /* In a Solaris elf file, this variable, which comes from the
1877 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1878 which comes from pst->textlow is correct. */
1879 if (last_source_start_addr
== 0)
1880 last_source_start_addr
= text_offset
;
1882 /* In reordered executables last_source_start_addr may not be the
1883 lower bound for this symtab, instead use text_offset which comes
1884 from pst->textlow which is correct. */
1885 if (last_source_start_addr
> text_offset
)
1886 last_source_start_addr
= text_offset
;
1888 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
, SECT_OFF_TEXT (objfile
));
1890 /* Process items which we had to "process_later" due to dependancies
1892 process_now (objfile
);
1898 /* This handles a single symbol from the symbol-file, building symbols
1899 into a GDB symtab. It takes these arguments and an implicit argument.
1901 TYPE is the type field of the ".stab" symbol entry.
1902 DESC is the desc field of the ".stab" entry.
1903 VALU is the value field of the ".stab" entry.
1904 NAME is the symbol name, in our address space.
1905 SECTION_OFFSETS is a set of amounts by which the sections of this object
1906 file were relocated when it was loaded into memory.
1907 Note that these section_offsets are not the
1908 objfile->section_offsets but the pst->section_offsets.
1909 All symbols that refer
1910 to memory locations need to be offset by these amounts.
1911 OBJFILE is the object file from which we are reading symbols.
1912 It is used in end_symtab. */
1915 process_one_symbol (type
, desc
, valu
, name
, section_offsets
, objfile
)
1919 struct section_offsets
*section_offsets
;
1920 struct objfile
*objfile
;
1922 #ifdef SUN_FIXED_LBRAC_BUG
1923 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
1924 to correct the address of N_LBRAC's. If it is not defined, then
1925 we never need to correct the addresses. */
1927 /* This records the last pc address we've seen. We depend on there being
1928 an SLINE or FUN or SO before the first LBRAC, since the variable does
1929 not get reset in between reads of different symbol files. */
1930 static CORE_ADDR last_pc_address
;
1933 register struct context_stack
*new;
1934 /* This remembers the address of the start of a function. It is used
1935 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
1936 relative to the current function's start address. On systems
1937 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
1938 used to relocate these symbol types rather than SECTION_OFFSETS. */
1939 static CORE_ADDR function_start_offset
;
1941 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
1942 file. Used to detect the SunPRO solaris compiler. */
1943 static int n_opt_found
;
1945 /* The stab type used for the definition of the last function.
1946 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1947 static int function_stab_type
= 0;
1949 if (!block_address_function_relative
)
1950 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
1951 function start address, so just use the text offset. */
1952 function_start_offset
= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
1954 /* Something is wrong if we see real data before
1955 seeing a source file name. */
1957 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
1959 /* Ignore any symbols which appear before an N_SO symbol.
1960 Currently no one puts symbols there, but we should deal
1961 gracefully with the case. A complain()t might be in order,
1962 but this should not be an error (). */
1971 if (*name
== '\000')
1973 /* This N_FUN marks the end of a function. This closes off the
1975 within_function
= 0;
1976 new = pop_context ();
1978 /* Make a block for the local symbols within. */
1979 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1980 new->start_addr
, new->start_addr
+ valu
,
1983 /* May be switching to an assembler file which may not be using
1984 block relative stabs, so reset the offset. */
1985 if (block_address_function_relative
)
1986 function_start_offset
= 0;
1991 /* Relocate for dynamic loading */
1992 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
1993 #ifdef SMASH_TEXT_ADDRESS
1994 SMASH_TEXT_ADDRESS (valu
);
1996 goto define_a_symbol
;
1999 /* This "symbol" just indicates the start of an inner lexical
2000 context within a function. */
2002 /* Ignore extra outermost context from SunPRO cc and acc. */
2003 if (n_opt_found
&& desc
== 1)
2006 if (block_address_function_relative
)
2007 /* Relocate for Sun ELF acc fn-relative syms. */
2008 valu
+= function_start_offset
;
2010 /* On most machines, the block addresses are relative to the
2011 N_SO, the linker did not relocate them (sigh). */
2012 valu
+= last_source_start_addr
;
2014 #ifdef SUN_FIXED_LBRAC_BUG
2015 if (!SUN_FIXED_LBRAC_BUG
&& valu
< last_pc_address
)
2017 /* Patch current LBRAC pc value to match last handy pc value */
2018 complain (&lbrac_complaint
);
2019 valu
= last_pc_address
;
2022 new = push_context (desc
, valu
);
2026 /* This "symbol" just indicates the end of an inner lexical
2027 context that was started with N_LBRAC. */
2029 /* Ignore extra outermost context from SunPRO cc and acc. */
2030 if (n_opt_found
&& desc
== 1)
2033 if (block_address_function_relative
)
2034 /* Relocate for Sun ELF acc fn-relative syms. */
2035 valu
+= function_start_offset
;
2037 /* On most machines, the block addresses are relative to the
2038 N_SO, the linker did not relocate them (sigh). */
2039 valu
+= last_source_start_addr
;
2041 new = pop_context ();
2042 if (desc
!= new->depth
)
2043 complain (&lbrac_mismatch_complaint
, symnum
);
2045 /* Some compilers put the variable decls inside of an
2046 LBRAC/RBRAC block. This macro should be nonzero if this
2047 is true. DESC is N_DESC from the N_RBRAC symbol.
2048 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
2049 or the GCC2_COMPILED_SYMBOL. */
2050 #if !defined (VARIABLES_INSIDE_BLOCK)
2051 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2054 /* Can only use new->locals as local symbols here if we're in
2055 gcc or on a machine that puts them before the lbrack. */
2056 if (!VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2057 local_symbols
= new->locals
;
2059 if (context_stack_depth
2060 > !VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2062 /* This is not the outermost LBRAC...RBRAC pair in the function,
2063 its local symbols preceded it, and are the ones just recovered
2064 from the context stack. Define the block for them (but don't
2065 bother if the block contains no symbols. Should we complain
2066 on blocks without symbols? I can't think of any useful purpose
2068 if (local_symbols
!= NULL
)
2070 /* Muzzle a compiler bug that makes end < start. (which
2071 compilers? Is this ever harmful?). */
2072 if (new->start_addr
> valu
)
2074 complain (&lbrac_rbrac_complaint
);
2075 new->start_addr
= valu
;
2077 /* Make a block for the local symbols within. */
2078 finish_block (0, &local_symbols
, new->old_blocks
,
2079 new->start_addr
, valu
, objfile
);
2084 /* This is the outermost LBRAC...RBRAC pair. There is no
2085 need to do anything; leave the symbols that preceded it
2086 to be attached to the function's own block. We need to
2087 indicate that we just moved outside of the function. */
2088 within_function
= 0;
2091 if (VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2092 /* Now pop locals of block just finished. */
2093 local_symbols
= new->locals
;
2098 /* This kind of symbol indicates the start of an object file. */
2099 /* Relocate for dynamic loading */
2100 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2104 /* This type of symbol indicates the start of data
2105 for one source file.
2106 Finish the symbol table of the previous source file
2107 (if any) and start accumulating a new symbol table. */
2108 /* Relocate for dynamic loading */
2109 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2113 #ifdef SUN_FIXED_LBRAC_BUG
2114 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2117 #ifdef PCC_SOL_BROKEN
2118 /* pcc bug, occasionally puts out SO for SOL. */
2119 if (context_stack_depth
> 0)
2121 start_subfile (name
, NULL
);
2125 if (last_source_file
)
2127 /* Check if previous symbol was also an N_SO (with some
2128 sanity checks). If so, that one was actually the directory
2129 name, and the current one is the real file name.
2131 if (previous_stab_code
== (unsigned char) N_SO
)
2133 patch_subfile_names (current_subfile
, name
);
2134 break; /* Ignore repeated SOs */
2136 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2140 /* Null name means this just marks the end of text for this .o file.
2141 Don't start a new symtab in this case. */
2142 if (*name
== '\000')
2145 if (block_address_function_relative
)
2146 function_start_offset
= 0;
2149 start_symtab (name
, NULL
, valu
);
2150 record_debugformat ("stabs");
2154 /* This type of symbol indicates the start of data for
2155 a sub-source-file, one whose contents were copied or
2156 included in the compilation of the main source file
2157 (whose name was given in the N_SO symbol.) */
2158 /* Relocate for dynamic loading */
2159 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2160 start_subfile (name
, current_subfile
->dirname
);
2165 add_new_header_file (name
, valu
);
2166 start_subfile (name
, current_subfile
->dirname
);
2170 start_subfile (pop_subfile (), current_subfile
->dirname
);
2174 add_old_header_file (name
, valu
);
2178 /* This type of "symbol" really just records
2179 one line-number -- core-address correspondence.
2180 Enter it in the line list for this symbol table. */
2182 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
2183 valu
+= function_start_offset
;
2185 #ifdef SUN_FIXED_LBRAC_BUG
2186 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2188 record_line (current_subfile
, desc
, valu
);
2192 common_block_start (name
, objfile
);
2196 common_block_end (objfile
);
2199 /* The following symbol types need to have the appropriate offset added
2200 to their value; then we process symbol definitions in the name. */
2202 case N_STSYM
: /* Static symbol in data seg */
2203 case N_LCSYM
: /* Static symbol in BSS seg */
2204 case N_ROSYM
: /* Static symbol in Read-only data seg */
2205 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2206 Solaris2's stabs-in-elf makes *most* symbols relative
2207 but leaves a few absolute (at least for Solaris 2.1 and version
2208 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
2209 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
2210 .stab "foo:V...",N_STSYM is relative (section base subtracted).
2211 This leaves us no choice but to search for the 'S' or 'V'...
2212 (or pass the whole section_offsets stuff down ONE MORE function
2213 call level, which we really don't want to do). */
2217 /* .o files and NLMs have non-zero text seg offsets, but don't need
2218 their static syms offset in this fashion. XXX - This is really a
2219 crock that should be fixed in the solib handling code so that I
2220 don't have to work around it here. */
2222 if (!symfile_relocatable
)
2224 p
= strchr (name
, ':');
2225 if (p
!= 0 && p
[1] == 'S')
2227 /* The linker relocated it. We don't want to add an
2228 elfstab_offset_sections-type offset, but we *do* want
2229 to add whatever solib.c passed to symbol_file_add as
2230 addr (this is known to affect SunOS4, and I suspect ELF
2231 too). Since elfstab_offset_sections currently does not
2232 muck with the text offset (there is no Ttext.text
2233 symbol), we can get addr from the text offset. If
2234 elfstab_offset_sections ever starts dealing with the
2235 text offset, and we still need to do this, we need to
2236 invent a SECT_OFF_ADDR_KLUDGE or something. */
2237 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2238 goto define_a_symbol
;
2241 /* Since it's not the kludge case, re-dispatch to the right handler. */
2255 case_N_STSYM
: /* Static symbol in data seg */
2256 case N_DSLINE
: /* Source line number, data seg */
2257 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
2258 goto define_a_symbol
;
2260 case_N_LCSYM
: /* Static symbol in BSS seg */
2261 case N_BSLINE
: /* Source line number, bss seg */
2262 /* N_BROWS: overlaps with N_BSLINE */
2263 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
2264 goto define_a_symbol
;
2266 case_N_ROSYM
: /* Static symbol in Read-only data seg */
2267 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
2268 goto define_a_symbol
;
2270 case N_ENTRY
: /* Alternate entry point */
2271 /* Relocate for dynamic loading */
2272 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2273 goto define_a_symbol
;
2275 /* The following symbol types we don't know how to process. Handle
2276 them in a "default" way, but complain to people who care. */
2278 case N_CATCH
: /* Exception handler catcher */
2279 case N_EHDECL
: /* Exception handler name */
2280 case N_PC
: /* Global symbol in Pascal */
2281 case N_M2C
: /* Modula-2 compilation unit */
2282 /* N_MOD2: overlaps with N_EHDECL */
2283 case N_SCOPE
: /* Modula-2 scope information */
2284 case N_ECOML
: /* End common (local name) */
2285 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
2290 complain (&unknown_symtype_complaint
, local_hex_string (type
));
2293 /* The following symbol types don't need the address field relocated,
2294 since it is either unused, or is absolute. */
2296 case N_GSYM
: /* Global variable */
2297 case N_NSYMS
: /* Number of symbols (ultrix) */
2298 case N_NOMAP
: /* No map? (ultrix) */
2299 case N_RSYM
: /* Register variable */
2300 case N_DEFD
: /* Modula-2 GNU module dependency */
2301 case N_SSYM
: /* Struct or union element */
2302 case N_LSYM
: /* Local symbol in stack */
2303 case N_PSYM
: /* Parameter variable */
2304 case N_LENG
: /* Length of preceding symbol type */
2308 char *colon_pos
= strchr (name
, ':');
2309 if (colon_pos
== NULL
)
2312 deftype
= colon_pos
[1];
2318 function_stab_type
= type
;
2320 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2321 /* Deal with the SunPRO 3.0 compiler which omits the address
2322 from N_FUN symbols. */
2324 && valu
== ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
)))
2326 find_stab_function_addr (name
, last_source_file
, objfile
);
2329 #ifdef SUN_FIXED_LBRAC_BUG
2330 /* The Sun acc compiler, under SunOS4, puts out
2331 functions with N_GSYM or N_STSYM. The problem is
2332 that the address of the symbol is no good (for N_GSYM
2333 it doesn't even attept an address; for N_STSYM it
2334 puts out an address but then it gets relocated
2335 relative to the data segment, not the text segment).
2336 Currently we can't fix this up later as we do for
2337 some types of symbol in scan_file_globals.
2338 Fortunately we do have a way of finding the address -
2339 we know that the value in last_pc_address is either
2340 the one we want (if we're dealing with the first
2341 function in an object file), or somewhere in the
2342 previous function. This means that we can use the
2343 minimal symbol table to get the address. */
2345 /* Starting with release 3.0, the Sun acc compiler,
2346 under SunOS4, puts out functions with N_FUN and a value
2347 of zero. This gets relocated to the start of the text
2348 segment of the module, which is no good either.
2349 Under SunOS4 we can deal with this as N_SLINE and N_SO
2350 entries contain valid absolute addresses.
2351 Release 3.0 acc also puts out N_OPT entries, which makes
2352 it possible to discern acc from cc or gcc. */
2354 if (type
== N_GSYM
|| type
== N_STSYM
2356 && n_opt_found
&& !block_address_function_relative
))
2358 struct minimal_symbol
*m
;
2359 int l
= colon_pos
- name
;
2361 m
= lookup_minimal_symbol_by_pc (last_pc_address
);
2362 if (m
&& STREQN (SYMBOL_NAME (m
), name
, l
)
2363 && SYMBOL_NAME (m
)[l
] == '\0')
2364 /* last_pc_address was in this function */
2365 valu
= SYMBOL_VALUE (m
);
2366 else if (m
&& SYMBOL_NAME (m
+ 1)
2367 && STREQN (SYMBOL_NAME (m
+ 1), name
, l
)
2368 && SYMBOL_NAME (m
+ 1)[l
] == '\0')
2369 /* last_pc_address was in last function */
2370 valu
= SYMBOL_VALUE (m
+ 1);
2372 /* Not found - use last_pc_address (for finish_block) */
2373 valu
= last_pc_address
;
2376 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2379 if (block_address_function_relative
)
2380 /* For Solaris 2.0 compilers, the block addresses and
2381 N_SLINE's are relative to the start of the
2382 function. On normal systems, and when using gcc on
2383 Solaris 2.0, these addresses are just absolute, or
2384 relative to the N_SO, depending on
2385 BLOCK_ADDRESS_ABSOLUTE. */
2386 function_start_offset
= valu
;
2388 within_function
= 1;
2390 if (context_stack_depth
> 1)
2392 complain (&lbrac_unmatched_complaint
, symnum
);
2396 if (context_stack_depth
> 0)
2398 new = pop_context ();
2399 /* Make a block for the local symbols within. */
2400 finish_block (new->name
, &local_symbols
, new->old_blocks
,
2401 new->start_addr
, valu
, objfile
);
2404 new = push_context (0, valu
);
2405 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
2409 define_symbol (valu
, name
, desc
, type
, objfile
);
2415 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2416 for a bunch of other flags, too. Someday we may parse their
2417 flags; for now we ignore theirs and hope they'll ignore ours. */
2418 case N_OPT
: /* Solaris 2: Compiler options */
2421 if (STREQ (name
, GCC2_COMPILED_FLAG_SYMBOL
))
2423 processing_gcc_compilation
= 2;
2424 #if 1 /* Works, but is experimental. -fnf */
2425 if (AUTO_DEMANGLING
)
2427 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2436 /* The following symbol types can be ignored. */
2437 case N_OBJ
: /* Solaris 2: Object file dir and name */
2438 /* N_UNDF: Solaris 2: file separator mark */
2439 /* N_UNDF: -- we will never encounter it, since we only process one
2440 file's symbols at once. */
2441 case N_ENDM
: /* Solaris 2: End of module */
2442 case N_MAIN
: /* Name of main routine. */
2443 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2447 /* '#' is a GNU C extension to allow one symbol to refer to another
2450 Generally this is used so that an alias can refer to its main
2454 /* Initialize symbol reference names and determine if this is
2455 a definition. If symbol reference is being defined, go
2456 ahead and add it. Otherwise, just return sym. */
2461 /* If this stab defines a new reference ID that is not on the
2462 reference list, then put it on the reference list.
2464 We go ahead and advance NAME past the reference, even though
2465 it is not strictly necessary at this time. */
2466 refnum
= symbol_reference_defined (&s
);
2468 if (!ref_search (refnum
))
2469 ref_add (refnum
, 0, name
, valu
);
2474 previous_stab_code
= type
;
2477 /* FIXME: The only difference between this and elfstab_build_psymtabs
2478 is the call to install_minimal_symbols for elf, and the support for
2479 split sections. If the differences are really that small, the code
2480 should be shared. */
2482 /* Scan and build partial symbols for an coff symbol file.
2483 The coff file has already been processed to get its minimal symbols.
2485 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2488 OBJFILE is the object file we are reading symbols from.
2489 ADDR is the address relative to which the symbols are (e.g.
2490 the base address of the text segment).
2491 MAINLINE is true if we are reading the main symbol
2492 table (as opposed to a shared lib or dynamically loaded file).
2493 TEXTADDR is the address of the text section.
2494 TEXTSIZE is the size of the text section.
2495 STABSECTS is the list of .stab sections in OBJFILE.
2496 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2497 .stabstr section exists.
2499 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2500 adjusted for coff details. */
2503 coffstab_build_psymtabs (objfile
, mainline
,
2504 textaddr
, textsize
, stabsects
,
2505 stabstroffset
, stabstrsize
)
2506 struct objfile
*objfile
;
2509 unsigned int textsize
;
2510 struct stab_section_list
*stabsects
;
2511 file_ptr stabstroffset
;
2512 unsigned int stabstrsize
;
2515 bfd
*sym_bfd
= objfile
->obfd
;
2516 char *name
= bfd_get_filename (sym_bfd
);
2517 struct dbx_symfile_info
*info
;
2518 unsigned int stabsize
;
2520 /* There is already a dbx_symfile_info allocated by our caller.
2521 It might even contain some info from the coff symtab to help us. */
2522 info
= objfile
->sym_stab_info
;
2524 DBX_TEXT_ADDR (objfile
) = textaddr
;
2525 DBX_TEXT_SIZE (objfile
) = textsize
;
2527 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2528 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
2529 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2531 if (stabstrsize
> bfd_get_size (sym_bfd
))
2532 error ("ridiculous string table size: %d bytes", stabstrsize
);
2533 DBX_STRINGTAB (objfile
) = (char *)
2534 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+ 1);
2535 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
2537 /* Now read in the string table in one big gulp. */
2539 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2541 perror_with_name (name
);
2542 val
= bfd_read (DBX_STRINGTAB (objfile
), stabstrsize
, 1, sym_bfd
);
2543 if (val
!= stabstrsize
)
2544 perror_with_name (name
);
2546 stabsread_new_init ();
2547 buildsym_new_init ();
2548 free_header_files ();
2549 init_header_files ();
2551 processing_acc_compilation
= 1;
2553 /* In a coff file, we've already installed the minimal symbols that came
2554 from the coff (non-stab) symbol table, so always act like an
2555 incremental load here. */
2556 if (stabsects
->next
== NULL
)
2558 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
2559 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2560 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
2564 struct stab_section_list
*stabsect
;
2566 DBX_SYMCOUNT (objfile
) = 0;
2567 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
2569 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
2570 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2573 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
2575 symbuf_sections
= stabsects
->next
;
2576 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
2580 dbx_symfile_read (objfile
, 0);
2583 /* Scan and build partial symbols for an ELF symbol file.
2584 This ELF file has already been processed to get its minimal symbols,
2585 and any DWARF symbols that were in it.
2587 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2590 OBJFILE is the object file we are reading symbols from.
2591 ADDR is the address relative to which the symbols are (e.g.
2592 the base address of the text segment).
2593 MAINLINE is true if we are reading the main symbol
2594 table (as opposed to a shared lib or dynamically loaded file).
2595 STABOFFSET and STABSIZE define the location in OBJFILE where the .stab
2597 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2598 .stabstr section exists.
2600 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2601 adjusted for elf details. */
2604 elfstab_build_psymtabs (objfile
, mainline
,
2605 staboffset
, stabsize
,
2606 stabstroffset
, stabstrsize
)
2607 struct objfile
*objfile
;
2609 file_ptr staboffset
;
2610 unsigned int stabsize
;
2611 file_ptr stabstroffset
;
2612 unsigned int stabstrsize
;
2615 bfd
*sym_bfd
= objfile
->obfd
;
2616 char *name
= bfd_get_filename (sym_bfd
);
2617 struct dbx_symfile_info
*info
;
2619 /* There is already a dbx_symfile_info allocated by our caller.
2620 It might even contain some info from the ELF symtab to help us. */
2621 info
= objfile
->sym_stab_info
;
2623 /* Find the first and last text address. dbx_symfile_read seems to
2625 find_text_range (sym_bfd
, objfile
);
2627 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2628 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
2629 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2630 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2631 DBX_SYMTAB_OFFSET (objfile
) = staboffset
;
2633 if (stabstrsize
> bfd_get_size (sym_bfd
))
2634 error ("ridiculous string table size: %d bytes", stabstrsize
);
2635 DBX_STRINGTAB (objfile
) = (char *)
2636 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+ 1);
2637 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
2639 /* Now read in the string table in one big gulp. */
2641 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2643 perror_with_name (name
);
2644 val
= bfd_read (DBX_STRINGTAB (objfile
), stabstrsize
, 1, sym_bfd
);
2645 if (val
!= stabstrsize
)
2646 perror_with_name (name
);
2648 stabsread_new_init ();
2649 buildsym_new_init ();
2650 free_header_files ();
2651 init_header_files ();
2652 install_minimal_symbols (objfile
);
2654 processing_acc_compilation
= 1;
2656 /* In an elf file, we've already installed the minimal symbols that came
2657 from the elf (non-stab) symbol table, so always act like an
2658 incremental load here. */
2659 dbx_symfile_read (objfile
, 0);
2662 /* Scan and build partial symbols for a file with special sections for stabs
2663 and stabstrings. The file has already been processed to get its minimal
2664 symbols, and any other symbols that might be necessary to resolve GSYMs.
2666 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2669 OBJFILE is the object file we are reading symbols from.
2670 ADDR is the address relative to which the symbols are (e.g. the base address
2671 of the text segment).
2672 MAINLINE is true if we are reading the main symbol table (as opposed to a
2673 shared lib or dynamically loaded file).
2674 STAB_NAME is the name of the section that contains the stabs.
2675 STABSTR_NAME is the name of the section that contains the stab strings.
2677 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
2680 stabsect_build_psymtabs (objfile
, mainline
, stab_name
,
2681 stabstr_name
, text_name
)
2682 struct objfile
*objfile
;
2689 bfd
*sym_bfd
= objfile
->obfd
;
2690 char *name
= bfd_get_filename (sym_bfd
);
2692 asection
*stabstrsect
;
2693 asection
*text_sect
;
2695 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
2696 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
2702 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
2703 stab_name
, stabstr_name
);
2705 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
2706 xmalloc (sizeof (struct dbx_symfile_info
));
2707 memset (objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
2709 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
2711 error ("Can't find %s section in symbol file", text_name
);
2712 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
2713 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
2715 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
2716 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
2717 / DBX_SYMBOL_SIZE (objfile
);
2718 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
2719 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
2721 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
2722 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile
));
2723 DBX_STRINGTAB (objfile
) = (char *)
2724 obstack_alloc (&objfile
->psymbol_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
2725 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
2727 /* Now read in the string table in one big gulp. */
2729 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
2730 stabstrsect
, /* bfd section */
2731 DBX_STRINGTAB (objfile
), /* input buffer */
2732 0, /* offset into section */
2733 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
2736 perror_with_name (name
);
2738 stabsread_new_init ();
2739 buildsym_new_init ();
2740 free_header_files ();
2741 init_header_files ();
2742 install_minimal_symbols (objfile
);
2744 /* Now, do an incremental load */
2746 processing_acc_compilation
= 1;
2747 dbx_symfile_read (objfile
, 0);
2750 static struct sym_fns aout_sym_fns
=
2752 bfd_target_aout_flavour
,
2753 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2754 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2755 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
2756 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
2757 default_symfile_offsets
, /* sym_offsets: parse user's offsets to internal form */
2758 NULL
/* next: pointer to next struct sym_fns */
2762 _initialize_dbxread ()
2764 add_symtab_fns (&aout_sym_fns
);