1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
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, Boston, MA 02111-1307, USA. */
21 /* This module provides three functions: dbx_symfile_init,
22 which initializes to read a symbol file; dbx_new_init, which
23 discards existing cached information when all symbols are being
24 discarded; and dbx_symfile_read, which reads a symbol table
27 dbx_symfile_read only does the minimum work necessary for letting the
28 user "name" things symbolically; it does not read the entire symtab.
29 Instead, it reads the external and static symbols and puts them in partial
30 symbol tables. When more extensive information is requested of a
31 file, the corresponding partial symbol table is mutated into a full
32 fledged symbol table by going back and reading the symbols
33 for real. dbx_psymtab_to_symtab() is the function that does this */
36 #include "gdb_string.h"
38 #if defined(USG) || defined(__CYGNUSCLIB__)
39 #include <sys/types.h>
47 #include "breakpoint.h"
50 #include "gdbcore.h" /* for bfd stuff */
51 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
55 #include "stabsread.h"
56 #include "gdb-stabs.h"
58 #include "language.h" /* Needed inside partial-stab.h */
59 #include "complaints.h"
61 #include "aout/aout64.h"
62 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
65 /* This macro returns the size field of a minimal symbol, which is normally
66 stored in the "info" field. The macro can be overridden for specific
67 targets (e.g. MIPS16) that use the info field for other purposes. */
69 #define MSYMBOL_SIZE(msym) ((long) MSYMBOL_INFO (msym))
73 /* We put a pointer to this structure in the read_symtab_private field
78 /* Offset within the file symbol table of first local symbol for this
83 /* Length (in bytes) of the section of the symbol table devoted to
84 this file's symbols (actually, the section bracketed may contain
85 more than just this file's symbols). If ldsymlen is 0, the only
86 reason for this thing's existence is the dependency list. Nothing
87 else will happen when it is read in. */
91 /* The size of each symbol in the symbol file (in external form). */
95 /* Further information needed to locate the symbols if they are in
100 int file_string_offset
;
103 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
104 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
105 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
106 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
107 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
108 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
109 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
112 /* Macro to determine which symbols to ignore when reading the first symbol
113 of a file. Some machines override this definition. */
114 #ifndef IGNORE_SYMBOL
115 /* This code is used on Ultrix systems. Ignore it */
116 #define IGNORE_SYMBOL(type) (type == (int)N_NSYMS)
119 /* Remember what we deduced to be the source language of this psymtab. */
121 static enum language psymtab_language
= language_unknown
;
123 /* Nonzero means give verbose info on gdb action. From main.c. */
124 extern int info_verbose
;
126 /* The BFD for this file -- implicit parameter to next_symbol_text. */
128 static bfd
*symfile_bfd
;
130 /* The size of each symbol in the symbol file (in external form).
131 This is set by dbx_symfile_read when building psymtabs, and by
132 dbx_psymtab_to_symtab when building symtabs. */
134 static unsigned symbol_size
;
136 /* This is the offset of the symbol table in the executable file */
137 static unsigned symbol_table_offset
;
139 /* This is the offset of the string table in the executable file */
140 static unsigned string_table_offset
;
142 /* For elf+stab executables, the n_strx field is not a simple index
143 into the string table. Instead, each .o file has a base offset
144 in the string table, and the associated symbols contain offsets
145 from this base. The following two variables contain the base
146 offset for the current and next .o files. */
147 static unsigned int file_string_table_offset
;
148 static unsigned int next_file_string_table_offset
;
150 /* .o and NLM files contain unrelocated addresses which are based at 0. When
151 non-zero, this flag disables some of the special cases for Solaris elf+stab
152 text addresses at location 0. */
154 static int symfile_relocatable
= 0;
156 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are relative
157 to the function start address. */
159 static int block_address_function_relative
= 0;
161 /* The lowest text address we have yet encountered. This is needed
162 because in an a.out file, there is no header field which tells us
163 what address the program is actually going to be loaded at, so we
164 need to make guesses based on the symbols (which *are* relocated to
165 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 /* During initial symbol readin, we need to have a structure to keep
203 track of which psymtabs have which bincls in them. This structure
204 is used during readin to setup the list of dependencies within each
205 partial symbol table. */
207 struct header_file_location
209 char *name
; /* Name of header file */
210 int instance
; /* See above */
211 struct partial_symtab
*pst
; /* Partial symtab that has the
212 BINCL/EINCL defs for this file */
215 /* The actual list and controling variables */
216 static struct header_file_location
*bincl_list
, *next_bincl
;
217 static int bincls_allocated
;
219 /* Local function prototypes */
222 process_now
PARAMS ((struct objfile
*));
225 free_header_files
PARAMS ((void));
228 init_header_files
PARAMS ((void));
231 read_ofile_symtab
PARAMS ((struct partial_symtab
*));
234 dbx_psymtab_to_symtab
PARAMS ((struct partial_symtab
*));
237 dbx_psymtab_to_symtab_1
PARAMS ((struct partial_symtab
*));
240 read_dbx_dynamic_symtab
PARAMS ((struct section_offsets
*,
241 struct objfile
*objfile
));
244 read_dbx_symtab
PARAMS ((struct section_offsets
*, struct objfile
*,
248 free_bincl_list
PARAMS ((struct objfile
*));
250 static struct partial_symtab
*
251 find_corresponding_bincl_psymtab
PARAMS ((char *, int));
254 add_bincl_to_list
PARAMS ((struct partial_symtab
*, char *, int));
257 init_bincl_list
PARAMS ((int, struct objfile
*));
260 dbx_next_symbol_text
PARAMS ((struct objfile
*));
263 fill_symbuf
PARAMS ((bfd
*));
266 dbx_symfile_init
PARAMS ((struct objfile
*));
269 dbx_new_init
PARAMS ((struct objfile
*));
272 dbx_symfile_read
PARAMS ((struct objfile
*, struct section_offsets
*, int));
275 dbx_symfile_finish
PARAMS ((struct objfile
*));
278 record_minimal_symbol
PARAMS ((char *, CORE_ADDR
, int, struct objfile
*));
281 add_new_header_file
PARAMS ((char *, int));
284 add_old_header_file
PARAMS ((char *, int));
287 add_this_object_header_file
PARAMS ((int));
289 /* Free up old header file tables */
294 if (this_object_header_files
)
296 free ((PTR
)this_object_header_files
);
297 this_object_header_files
= NULL
;
299 n_allocated_this_object_header_files
= 0;
302 /* Allocate new header file tables */
307 n_allocated_this_object_header_files
= 10;
308 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
311 /* Add header file number I for this object file
312 at the next successive FILENUM. */
315 add_this_object_header_file (i
)
318 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
320 n_allocated_this_object_header_files
*= 2;
321 this_object_header_files
322 = (int *) xrealloc ((char *) this_object_header_files
,
323 n_allocated_this_object_header_files
* sizeof (int));
326 this_object_header_files
[n_this_object_header_files
++] = i
;
329 /* Add to this file an "old" header file, one already seen in
330 a previous object file. NAME is the header file's name.
331 INSTANCE is its instance code, to select among multiple
332 symbol tables for the same header file. */
335 add_old_header_file (name
, instance
)
339 register struct header_file
*p
= HEADER_FILES (current_objfile
);
342 for (i
= 0; i
< N_HEADER_FILES (current_objfile
); i
++)
343 if (STREQ (p
[i
].name
, name
) && instance
== p
[i
].instance
)
345 add_this_object_header_file (i
);
348 complain (&repeated_header_complaint
, name
, symnum
);
351 /* Add to this file a "new" header file: definitions for its types follow.
352 NAME is the header file's name.
353 Most often this happens only once for each distinct header file,
354 but not necessarily. If it happens more than once, INSTANCE has
355 a different value each time, and references to the header file
356 use INSTANCE values to select among them.
358 dbx output contains "begin" and "end" markers for each new header file,
359 but at this level we just need to know which files there have been;
360 so we record the file when its "begin" is seen and ignore the "end". */
363 add_new_header_file (name
, instance
)
368 register struct header_file
*hfile
;
370 /* Make sure there is room for one more header file. */
372 i
= N_ALLOCATED_HEADER_FILES (current_objfile
);
374 if (N_HEADER_FILES (current_objfile
) == i
)
378 N_ALLOCATED_HEADER_FILES (current_objfile
) = 10;
379 HEADER_FILES (current_objfile
) = (struct header_file
*)
380 xmalloc (10 * sizeof (struct header_file
));
385 N_ALLOCATED_HEADER_FILES (current_objfile
) = i
;
386 HEADER_FILES (current_objfile
) = (struct header_file
*)
387 xrealloc ((char *) HEADER_FILES (current_objfile
),
388 (i
* sizeof (struct header_file
)));
392 /* Create an entry for this header file. */
394 i
= N_HEADER_FILES (current_objfile
)++;
395 hfile
= HEADER_FILES (current_objfile
) + i
;
396 hfile
->name
= savestring (name
, strlen(name
));
397 hfile
->instance
= instance
;
400 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
401 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
403 add_this_object_header_file (i
);
407 static struct type
**
408 explicit_lookup_type (real_filenum
, index
)
409 int real_filenum
, index
;
411 register struct header_file
*f
= &HEADER_FILES (current_objfile
)[real_filenum
];
413 if (index
>= f
->length
)
416 f
->vector
= (struct type
**)
417 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
418 memset (&f
->vector
[f
->length
/ 2],
419 '\0', f
->length
* sizeof (struct type
*) / 2);
421 return &f
->vector
[index
];
426 record_minimal_symbol (name
, address
, type
, objfile
)
430 struct objfile
*objfile
;
432 enum minimal_symbol_type ms_type
;
434 asection
*bfd_section
;
440 section
= SECT_OFF_TEXT
;
441 bfd_section
= DBX_TEXT_SECTION (objfile
);
445 section
= SECT_OFF_DATA
;
446 bfd_section
= DBX_DATA_SECTION (objfile
);
450 section
= SECT_OFF_BSS
;
451 bfd_section
= DBX_BSS_SECTION (objfile
);
461 section
= SECT_OFF_DATA
;
462 bfd_section
= DBX_DATA_SECTION (objfile
);
465 /* I don't think this type actually exists; since a N_SETV is the result
466 of going over many .o files, it doesn't make sense to have one
468 ms_type
= mst_file_data
;
469 section
= SECT_OFF_DATA
;
470 bfd_section
= DBX_DATA_SECTION (objfile
);
477 ms_type
= mst_file_text
;
478 section
= SECT_OFF_TEXT
;
479 bfd_section
= DBX_TEXT_SECTION (objfile
);
482 ms_type
= mst_file_data
;
484 /* Check for __DYNAMIC, which is used by Sun shared libraries.
485 Record it as global even if it's local, not global, so
486 lookup_minimal_symbol can find it. We don't check symbol_leading_char
487 because for SunOS4 it always is '_'. */
488 if (name
[8] == 'C' && STREQ ("__DYNAMIC", name
))
491 /* Same with virtual function tables, both global and static. */
493 char *tempstring
= name
;
494 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
496 if (VTBL_PREFIX_P ((tempstring
)))
499 section
= SECT_OFF_DATA
;
500 bfd_section
= DBX_DATA_SECTION (objfile
);
503 ms_type
= mst_file_bss
;
504 section
= SECT_OFF_BSS
;
505 bfd_section
= DBX_BSS_SECTION (objfile
);
508 ms_type
= mst_unknown
;
514 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
515 && address
< lowest_text_address
)
516 lowest_text_address
= address
;
518 prim_record_minimal_symbol_and_info
519 (name
, address
, ms_type
, NULL
, section
, bfd_section
, objfile
);
522 /* Scan and build partial symbols for a symbol file.
523 We have been initialized by a call to dbx_symfile_init, which
524 put all the relevant info into a "struct dbx_symfile_info",
525 hung off the objfile structure.
527 SECTION_OFFSETS contains offsets relative to which the symbols in the
528 various sections are (depending where the sections were actually loaded).
529 MAINLINE is true if we are reading the main symbol
530 table (as opposed to a shared lib or dynamically loaded file). */
533 dbx_symfile_read (objfile
, section_offsets
, mainline
)
534 struct objfile
*objfile
;
535 struct section_offsets
*section_offsets
;
536 int mainline
; /* FIXME comments above */
540 struct cleanup
*back_to
;
542 val
= strlen (objfile
->name
);
544 sym_bfd
= objfile
->obfd
;
546 /* .o and .nlm files are relocatables with text, data and bss segs based at
547 0. This flag disables special (Solaris stabs-in-elf only) fixups for
548 symbols with a value of 0. */
550 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
552 /* This is true for Solaris (and all other systems which put stabs
553 in sections, hopefully, since it would be silly to do things
554 differently from Solaris), and false for SunOS4 and other a.out
556 block_address_function_relative
=
557 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
558 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
559 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
560 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
561 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
563 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
565 perror_with_name (objfile
->name
);
567 /* If we are reinitializing, or if we have never loaded syms yet, init */
569 || objfile
->global_psymbols
.size
== 0
570 || objfile
->static_psymbols
.size
== 0)
571 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
573 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
574 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
576 free_pending_blocks ();
577 back_to
= make_cleanup (really_free_pendings
, 0);
579 init_minimal_symbol_collection ();
580 make_cleanup (discard_minimal_symbols
, 0);
582 /* Now that the symbol table data of the executable file are all in core,
583 process them and define symbols accordingly. */
585 read_dbx_symtab (section_offsets
, objfile
,
586 DBX_TEXT_ADDR (objfile
),
587 DBX_TEXT_SIZE (objfile
));
589 /* Add the dynamic symbols. */
591 read_dbx_dynamic_symtab (section_offsets
, objfile
);
593 /* Install any minimal symbols that have been collected as the current
594 minimal symbols for this objfile. */
596 install_minimal_symbols (objfile
);
598 do_cleanups (back_to
);
601 /* Initialize anything that needs initializing when a completely new
602 symbol file is specified (not just adding some symbols from another
603 file, e.g. a shared library). */
606 dbx_new_init (ignore
)
607 struct objfile
*ignore
;
609 stabsread_new_init ();
610 buildsym_new_init ();
611 init_header_files ();
615 /* dbx_symfile_init ()
616 is the dbx-specific initialization routine for reading symbols.
617 It is passed a struct objfile which contains, among other things,
618 the BFD for the file whose symbols are being read, and a slot for a pointer
619 to "private data" which we fill with goodies.
621 We read the string table into malloc'd space and stash a pointer to it.
623 Since BFD doesn't know how to read debug symbols in a format-independent
624 way (and may never do so...), we have to do it ourselves. We will never
625 be called unless this is an a.out (or very similar) file.
626 FIXME, there should be a cleaner peephole into the BFD environment here. */
628 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
631 dbx_symfile_init (objfile
)
632 struct objfile
*objfile
;
635 bfd
*sym_bfd
= objfile
->obfd
;
636 char *name
= bfd_get_filename (sym_bfd
);
638 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
640 /* Allocate struct to keep track of the symfile */
641 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
642 xmmalloc (objfile
-> md
, sizeof (struct dbx_symfile_info
));
643 memset ((PTR
) objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
645 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
646 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
647 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
649 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
650 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
651 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
653 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
655 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
657 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
659 error ("Can't find .text section in symbol file");
660 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
661 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
663 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
664 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
665 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
667 /* Read the string table and stash it away in the psymbol_obstack. It is
668 only needed as long as we need to expand psymbols into full symbols,
669 so when we blow away the psymbol the string table goes away as well.
670 Note that gdb used to use the results of attempting to malloc the
671 string table, based on the size it read, as a form of sanity check
672 for botched byte swapping, on the theory that a byte swapped string
673 table size would be so totally bogus that the malloc would fail. Now
674 that we put in on the psymbol_obstack, we can't do this since gdb gets
675 a fatal error (out of virtual memory) if the size is bogus. We can
676 however at least check to see if the size is less than the size of
677 the size field itself, or larger than the size of the entire file.
678 Note that all valid string tables have a size greater than zero, since
679 the bytes used to hold the size are included in the count. */
681 if (STRING_TABLE_OFFSET
== 0)
683 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
684 will never be zero, even when there is no string table. This
685 would appear to be a bug in bfd. */
686 DBX_STRINGTAB_SIZE (objfile
) = 0;
687 DBX_STRINGTAB (objfile
) = NULL
;
691 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
693 perror_with_name (name
);
695 memset ((PTR
) size_temp
, 0, sizeof (size_temp
));
696 val
= bfd_read ((PTR
) size_temp
, sizeof (size_temp
), 1, sym_bfd
);
699 perror_with_name (name
);
703 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
704 EOF if there is no string table, and attempting to read the size
705 from EOF will read zero bytes. */
706 DBX_STRINGTAB_SIZE (objfile
) = 0;
707 DBX_STRINGTAB (objfile
) = NULL
;
711 /* Read some data that would appear to be the string table size.
712 If there really is a string table, then it is probably the right
713 size. Byteswap if necessary and validate the size. Note that
714 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
715 random data that happened to be at STRING_TABLE_OFFSET, because
716 bfd can't tell us there is no string table, the sanity checks may
717 or may not catch this. */
718 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
720 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
721 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
722 error ("ridiculous string table size (%d bytes).",
723 DBX_STRINGTAB_SIZE (objfile
));
725 DBX_STRINGTAB (objfile
) =
726 (char *) obstack_alloc (&objfile
-> psymbol_obstack
,
727 DBX_STRINGTAB_SIZE (objfile
));
728 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
730 /* Now read in the string table in one big gulp. */
732 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
734 perror_with_name (name
);
735 val
= bfd_read (DBX_STRINGTAB (objfile
), DBX_STRINGTAB_SIZE (objfile
), 1,
737 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
738 perror_with_name (name
);
743 /* Perform any local cleanups required when we are done with a particular
744 objfile. I.E, we are in the process of discarding all symbol information
745 for an objfile, freeing up all memory held for it, and unlinking the
746 objfile struct from the global list of known objfiles. */
749 dbx_symfile_finish (objfile
)
750 struct objfile
*objfile
;
752 if (objfile
->sym_stab_info
!= NULL
)
754 if (HEADER_FILES (objfile
) != NULL
)
756 register int i
= N_HEADER_FILES (objfile
);
757 register struct header_file
*hfiles
= HEADER_FILES (objfile
);
761 free (hfiles
[i
].name
);
762 free (hfiles
[i
].vector
);
766 mfree (objfile
-> md
, objfile
->sym_stab_info
);
768 free_header_files ();
772 /* Buffer for reading the symbol table entries. */
773 static struct external_nlist symbuf
[4096];
774 static int symbuf_idx
;
775 static int symbuf_end
;
777 /* cont_elem is used for continuing information in cfront.
778 It saves information about which types need to be fixed up and
779 completed after all the stabs are read. */
782 /* sym and stabsstring for continuing information in cfront */
785 /* state dependancies (statics that must be preserved) */
789 int (*func
) PARAMS ((struct objfile
*, struct symbol
*, char *));
790 /* other state dependancies include:
791 (assumption is that these will not change since process_now FIXME!!)
798 static struct cont_elem
*cont_list
= 0;
799 static int cont_limit
= 0;
800 static int cont_count
= 0;
802 /* Arrange for function F to be called with arguments SYM and P later
803 in the stabs reading process. */
805 process_later (sym
, p
, f
)
808 int (*f
) PARAMS ((struct objfile
*, struct symbol
*, char *));
811 /* Allocate more space for the deferred list. */
812 if (cont_count
>= cont_limit
- 1)
814 cont_limit
+= 32; /* chunk size */
817 = (struct cont_elem
*) xrealloc (cont_list
,
819 * sizeof (struct cont_elem
)));
821 error ("Virtual memory exhausted\n");
824 /* Save state variables so we can process these stabs later. */
825 cont_list
[cont_count
].sym_idx
= symbuf_idx
;
826 cont_list
[cont_count
].sym_end
= symbuf_end
;
827 cont_list
[cont_count
].symnum
= symnum
;
828 cont_list
[cont_count
].sym
= sym
;
829 cont_list
[cont_count
].stabs
= p
;
830 cont_list
[cont_count
].func
= f
;
834 /* Call deferred funtions in CONT_LIST. */
837 process_now (objfile
)
838 struct objfile
*objfile
;
847 int (*func
) PARAMS ((struct objfile
*, struct symbol
*, char *));
849 /* Save the state of our caller, we'll want to restore it before
851 save_symbuf_idx
= symbuf_idx
;
852 save_symbuf_end
= symbuf_end
;
853 save_symnum
= symnum
;
855 /* Iterate over all the deferred stabs. */
856 for (i
= 0; i
< cont_count
; i
++)
858 /* Restore the state for this deferred stab. */
859 symbuf_idx
= cont_list
[i
].sym_idx
;
860 symbuf_end
= cont_list
[i
].sym_end
;
861 symnum
= cont_list
[i
].symnum
;
862 sym
= cont_list
[i
].sym
;
863 stabs
= cont_list
[i
].stabs
;
864 func
= cont_list
[i
].func
;
866 /* Call the function to handle this deferrd stab. */
867 err
= (*func
) (objfile
, sym
, stabs
);
869 error ("Internal error: unable to resolve stab.\n");
872 /* Restore our caller's state. */
873 symbuf_idx
= save_symbuf_idx
;
874 symbuf_end
= save_symbuf_end
;
875 symnum
= save_symnum
;
880 /* Name of last function encountered. Used in Solaris to approximate
881 object file boundaries. */
882 static char *last_function_name
;
884 /* The address in memory of the string table of the object file we are
885 reading (which might not be the "main" object file, but might be a
886 shared library or some other dynamically loaded thing). This is
887 set by read_dbx_symtab when building psymtabs, and by
888 read_ofile_symtab when building symtabs, and is used only by
889 next_symbol_text. FIXME: If that is true, we don't need it when
890 building psymtabs, right? */
891 static char *stringtab_global
;
893 /* These variables are used to control fill_symbuf when the stabs
894 symbols are not contiguous (as may be the case when a COFF file is
895 linked using --split-by-reloc). */
896 static struct stab_section_list
*symbuf_sections
;
897 static unsigned int symbuf_left
;
898 static unsigned int symbuf_read
;
900 /* Refill the symbol table input buffer
901 and set the variables that control fetching entries from it.
902 Reports an error if no data available.
903 This function can read past the end of the symbol table
904 (into the string table) but this does no harm. */
907 fill_symbuf (sym_bfd
)
913 if (symbuf_sections
== NULL
)
914 count
= sizeof (symbuf
);
917 if (symbuf_left
<= 0)
919 file_ptr filepos
= symbuf_sections
->section
->filepos
;
920 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
921 perror_with_name (bfd_get_filename (sym_bfd
));
922 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
923 symbol_table_offset
= filepos
- symbuf_read
;
924 symbuf_sections
= symbuf_sections
->next
;
928 if (count
> sizeof (symbuf
))
929 count
= sizeof (symbuf
);
932 nbytes
= bfd_read ((PTR
)symbuf
, count
, 1, sym_bfd
);
934 perror_with_name (bfd_get_filename (sym_bfd
));
935 else if (nbytes
== 0)
936 error ("Premature end of file reading symbol table");
937 symbuf_end
= nbytes
/ symbol_size
;
939 symbuf_left
-= nbytes
;
940 symbuf_read
+= nbytes
;
943 #define SWAP_SYMBOL(symp, abfd) \
945 (symp)->n_strx = bfd_h_get_32(abfd, \
946 (unsigned char *)&(symp)->n_strx); \
947 (symp)->n_desc = bfd_h_get_16 (abfd, \
948 (unsigned char *)&(symp)->n_desc); \
949 (symp)->n_value = bfd_h_get_32 (abfd, \
950 (unsigned char *)&(symp)->n_value); \
953 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
955 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
956 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
957 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
958 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
961 /* Invariant: The symbol pointed to by symbuf_idx is the first one
962 that hasn't been swapped. Swap the symbol at the same time
963 that symbuf_idx is incremented. */
965 /* dbx allows the text of a symbol name to be continued into the
966 next symbol name! When such a continuation is encountered
967 (a \ at the end of the text of a name)
968 call this function to get the continuation. */
971 dbx_next_symbol_text (objfile
)
972 struct objfile
*objfile
;
974 struct internal_nlist nlist
;
976 if (symbuf_idx
== symbuf_end
)
977 fill_symbuf (symfile_bfd
);
980 INTERNALIZE_SYMBOL(nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
981 OBJSTAT (objfile
, n_stabs
++);
985 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
988 /* Initialize the list of bincls to contain none and have some
992 init_bincl_list (number
, objfile
)
994 struct objfile
*objfile
;
996 bincls_allocated
= number
;
997 next_bincl
= bincl_list
= (struct header_file_location
*)
998 xmmalloc (objfile
-> md
, bincls_allocated
* sizeof(struct header_file_location
));
1001 /* Add a bincl to the list. */
1004 add_bincl_to_list (pst
, name
, instance
)
1005 struct partial_symtab
*pst
;
1009 if (next_bincl
>= bincl_list
+ bincls_allocated
)
1011 int offset
= next_bincl
- bincl_list
;
1012 bincls_allocated
*= 2;
1013 bincl_list
= (struct header_file_location
*)
1014 xmrealloc (pst
->objfile
->md
, (char *)bincl_list
,
1015 bincls_allocated
* sizeof (struct header_file_location
));
1016 next_bincl
= bincl_list
+ offset
;
1018 next_bincl
->pst
= pst
;
1019 next_bincl
->instance
= instance
;
1020 next_bincl
++->name
= name
;
1023 /* Given a name, value pair, find the corresponding
1024 bincl in the list. Return the partial symtab associated
1025 with that header_file_location. */
1027 static struct partial_symtab
*
1028 find_corresponding_bincl_psymtab (name
, instance
)
1032 struct header_file_location
*bincl
;
1034 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
1035 if (bincl
->instance
== instance
1036 && STREQ (name
, bincl
->name
))
1039 complain (&repeated_header_complaint
, name
, symnum
);
1040 return (struct partial_symtab
*) 0;
1043 /* Free the storage allocated for the bincl list. */
1046 free_bincl_list (objfile
)
1047 struct objfile
*objfile
;
1049 mfree (objfile
-> md
, (PTR
)bincl_list
);
1050 bincls_allocated
= 0;
1053 /* Scan a SunOs dynamic symbol table for symbols of interest and
1054 add them to the minimal symbol table. */
1057 read_dbx_dynamic_symtab (section_offsets
, objfile
)
1058 struct section_offsets
*section_offsets
;
1059 struct objfile
*objfile
;
1061 bfd
*abfd
= objfile
->obfd
;
1062 struct cleanup
*back_to
;
1072 CORE_ADDR sym_value
;
1075 /* Check that the symbol file has dynamic symbols that we know about.
1076 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1077 on a sun4 host (and vice versa) and bfd is not configured
1078 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1079 so we ignore the dynamic symbols in this case. */
1080 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1081 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1082 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1085 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1086 if (dynsym_size
< 0)
1089 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1090 back_to
= make_cleanup (free
, dynsyms
);
1092 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1093 if (dynsym_count
< 0)
1095 do_cleanups (back_to
);
1099 /* Enter dynamic symbols into the minimal symbol table
1100 if this is a stripped executable. */
1101 if (bfd_get_symcount (abfd
) <= 0)
1104 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1106 asymbol
*sym
= *symptr
;
1110 sec
= bfd_get_section (sym
);
1112 /* BFD symbols are section relative. */
1113 sym_value
= sym
->value
+ sec
->vma
;
1115 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1117 sym_value
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1120 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1122 sym_value
+= ANOFFSET (section_offsets
, SECT_OFF_DATA
);
1125 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1127 sym_value
+= ANOFFSET (section_offsets
, SECT_OFF_BSS
);
1133 if (sym
->flags
& BSF_GLOBAL
)
1136 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1141 /* Symbols from shared libraries have a dynamic relocation entry
1142 that points to the associated slot in the procedure linkage table.
1143 We make a mininal symbol table entry with type mst_solib_trampoline
1144 at the address in the procedure linkage table. */
1145 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1146 if (dynrel_size
< 0)
1148 do_cleanups (back_to
);
1152 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1153 make_cleanup (free
, dynrels
);
1155 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1156 if (dynrel_count
< 0)
1158 do_cleanups (back_to
);
1162 for (counter
= 0, relptr
= dynrels
;
1163 counter
< dynrel_count
;
1164 counter
++, relptr
++)
1166 arelent
*rel
= *relptr
;
1168 rel
->address
+ ANOFFSET (section_offsets
, SECT_OFF_DATA
);
1170 switch (bfd_get_arch (abfd
))
1172 case bfd_arch_sparc
:
1173 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1177 /* `16' is the type BFD produces for a jump table relocation. */
1178 if (rel
->howto
->type
!= 16)
1181 /* Adjust address in the jump table to point to
1182 the start of the bsr instruction. */
1189 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1190 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1194 do_cleanups (back_to
);
1197 /* Given pointers to an a.out symbol table in core containing dbx
1198 style data, setup partial_symtab's describing each source file for
1199 which debugging information is available.
1200 SYMFILE_NAME is the name of the file we are reading from
1201 and SECTION_OFFSETS is the set of offsets for the various sections
1202 of the file (a set of zeros if the mainline program). */
1205 read_dbx_symtab (section_offsets
, objfile
, text_addr
, text_size
)
1206 struct section_offsets
*section_offsets
;
1207 struct objfile
*objfile
;
1208 CORE_ADDR text_addr
;
1211 register struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1212 struct internal_nlist nlist
;
1214 register char *namestring
;
1216 int past_first_source_file
= 0;
1217 CORE_ADDR last_o_file_start
= 0;
1218 CORE_ADDR last_function_start
= 0;
1219 struct cleanup
*back_to
;
1221 int textlow_not_set
;
1223 /* Current partial symtab */
1224 struct partial_symtab
*pst
;
1226 /* List of current psymtab's include files */
1227 char **psymtab_include_list
;
1228 int includes_allocated
;
1231 /* Index within current psymtab dependency list */
1232 struct partial_symtab
**dependency_list
;
1233 int dependencies_used
, dependencies_allocated
;
1235 /* FIXME. We probably want to change stringtab_global rather than add this
1236 while processing every symbol entry. FIXME. */
1237 file_string_table_offset
= 0;
1238 next_file_string_table_offset
= 0;
1240 stringtab_global
= DBX_STRINGTAB (objfile
);
1242 pst
= (struct partial_symtab
*) 0;
1244 includes_allocated
= 30;
1246 psymtab_include_list
= (char **) alloca (includes_allocated
*
1249 dependencies_allocated
= 30;
1250 dependencies_used
= 0;
1252 (struct partial_symtab
**) alloca (dependencies_allocated
*
1253 sizeof (struct partial_symtab
*));
1255 /* Init bincl list */
1256 init_bincl_list (20, objfile
);
1257 back_to
= make_cleanup (free_bincl_list
, objfile
);
1259 last_source_file
= NULL
;
1261 lowest_text_address
= (CORE_ADDR
)-1;
1263 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1264 abfd
= objfile
->obfd
;
1265 symbuf_end
= symbuf_idx
= 0;
1266 next_symbol_text_func
= dbx_next_symbol_text
;
1267 textlow_not_set
= 1;
1268 has_line_numbers
= 0;
1270 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1272 /* Get the symbol for this run and pull out some info */
1273 QUIT
; /* allow this to be interruptable */
1274 if (symbuf_idx
== symbuf_end
)
1276 bufp
= &symbuf
[symbuf_idx
++];
1279 * Special case to speed up readin.
1281 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1283 has_line_numbers
= 1;
1287 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1288 OBJSTAT (objfile
, n_stabs
++);
1290 /* Ok. There is a lot of code duplicated in the rest of this
1291 switch statement (for efficiency reasons). Since I don't
1292 like duplicating code, I will do my penance here, and
1293 describe the code which is duplicated:
1295 *) The assignment to namestring.
1296 *) The call to strchr.
1297 *) The addition of a partial symbol the the two partial
1298 symbol lists. This last is a large section of code, so
1299 I've imbedded it in the following macro.
1302 /* Set namestring based on nlist. If the string table index is invalid,
1303 give a fake name, and print a single error message per symbol file read,
1304 rather than abort the symbol reading or flood the user with messages. */
1306 /*FIXME: Too many adds and indirections in here for the inner loop. */
1307 #define SET_NAMESTRING()\
1308 if (((unsigned)CUR_SYMBOL_STRX + file_string_table_offset) >= \
1309 DBX_STRINGTAB_SIZE (objfile)) { \
1310 complain (&string_table_offset_complaint, symnum); \
1311 namestring = "<bad string table offset>"; \
1313 namestring = CUR_SYMBOL_STRX + file_string_table_offset + \
1314 DBX_STRINGTAB (objfile)
1316 #define CUR_SYMBOL_TYPE nlist.n_type
1317 #define CUR_SYMBOL_VALUE nlist.n_value
1318 #define CUR_SYMBOL_STRX nlist.n_strx
1319 #define DBXREAD_ONLY
1320 #define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms)\
1321 start_psymtab(ofile, secoff, fname, low, symoff, global_syms, static_syms)
1322 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\
1323 end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)
1325 #include "partial-stab.h"
1328 /* If there's stuff to be cleaned up, clean it up. */
1329 if (DBX_SYMCOUNT (objfile
) > 0 /* We have some syms */
1330 /*FIXME, does this have a bug at start address 0? */
1331 && last_o_file_start
1332 && objfile
-> ei
.entry_point
< nlist
.n_value
1333 && objfile
-> ei
.entry_point
>= last_o_file_start
)
1335 objfile
-> ei
.entry_file_lowpc
= last_o_file_start
;
1336 objfile
-> ei
.entry_file_highpc
= nlist
.n_value
;
1341 /* Don't set pst->texthigh lower than it already is. */
1342 CORE_ADDR text_end
=
1343 (lowest_text_address
== (CORE_ADDR
)-1
1344 ? (text_addr
+ section_offsets
->offsets
[SECT_OFF_TEXT
])
1345 : lowest_text_address
)
1348 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1349 symnum
* symbol_size
,
1350 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
1351 dependency_list
, dependencies_used
, textlow_not_set
);
1354 do_cleanups (back_to
);
1357 /* Allocate and partially fill a partial symtab. It will be
1358 completely filled at the end of the symbol list.
1360 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1361 is the address relative to which its symbols are (incremental) or 0
1365 struct partial_symtab
*
1366 start_psymtab (objfile
, section_offsets
,
1367 filename
, textlow
, ldsymoff
, global_syms
, static_syms
)
1368 struct objfile
*objfile
;
1369 struct section_offsets
*section_offsets
;
1373 struct partial_symbol
**global_syms
;
1374 struct partial_symbol
**static_syms
;
1376 struct partial_symtab
*result
=
1377 start_psymtab_common(objfile
, section_offsets
,
1378 filename
, textlow
, global_syms
, static_syms
);
1380 result
->read_symtab_private
= (char *)
1381 obstack_alloc (&objfile
-> psymbol_obstack
, sizeof (struct symloc
));
1382 LDSYMOFF(result
) = ldsymoff
;
1383 result
->read_symtab
= dbx_psymtab_to_symtab
;
1384 SYMBOL_SIZE(result
) = symbol_size
;
1385 SYMBOL_OFFSET(result
) = symbol_table_offset
;
1386 STRING_OFFSET(result
) = string_table_offset
;
1387 FILE_STRING_OFFSET(result
) = file_string_table_offset
;
1389 /* If we're handling an ELF file, drag some section-relocation info
1390 for this source file out of the ELF symbol table, to compensate for
1391 Sun brain death. This replaces the section_offsets in this psymtab,
1393 elfstab_offset_sections (objfile
, result
);
1395 /* Deduce the source language from the filename for this psymtab. */
1396 psymtab_language
= deduce_language_from_filename (filename
);
1401 /* Close off the current usage of PST.
1402 Returns PST or NULL if the partial symtab was empty and thrown away.
1404 FIXME: List variables and peculiarities of same. */
1406 struct partial_symtab
*
1407 end_psymtab (pst
, include_list
, num_includes
, capping_symbol_offset
,
1408 capping_text
, dependency_list
, number_dependencies
, textlow_not_set
)
1409 struct partial_symtab
*pst
;
1410 char **include_list
;
1412 int capping_symbol_offset
;
1413 CORE_ADDR capping_text
;
1414 struct partial_symtab
**dependency_list
;
1415 int number_dependencies
;
1416 int textlow_not_set
;
1419 struct objfile
*objfile
= pst
-> objfile
;
1421 if (capping_symbol_offset
!= -1)
1422 LDSYMLEN(pst
) = capping_symbol_offset
- LDSYMOFF(pst
);
1423 pst
->texthigh
= capping_text
;
1425 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1426 /* Under Solaris, the N_SO symbols always have a value of 0,
1427 instead of the usual address of the .o file. Therefore,
1428 we have to do some tricks to fill in texthigh and textlow.
1429 The first trick is in partial-stab.h: if we see a static
1430 or global function, and the textlow for the current pst
1431 is not set (ie: textlow_not_set), then we use that function's
1432 address for the textlow of the pst. */
1434 /* Now, to fill in texthigh, we remember the last function seen
1435 in the .o file (also in partial-stab.h). Also, there's a hack in
1436 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1437 to here via the misc_info field. Therefore, we can fill in
1438 a reliable texthigh by taking the address plus size of the
1439 last function in the file. */
1441 if (pst
->texthigh
== 0 && last_function_name
)
1445 struct minimal_symbol
*minsym
;
1447 p
= strchr (last_function_name
, ':');
1449 p
= last_function_name
;
1450 n
= p
- last_function_name
;
1452 strncpy (p
, last_function_name
, n
);
1455 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
1458 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
1460 last_function_name
= NULL
;
1463 /* this test will be true if the last .o file is only data */
1464 if (textlow_not_set
)
1465 pst
->textlow
= pst
->texthigh
;
1468 struct partial_symtab
*p1
;
1470 /* If we know our own starting text address, then walk through all other
1471 psymtabs for this objfile, and if any didn't know their ending text
1472 address, set it to our starting address. Take care to not set our
1473 own ending address to our starting address, nor to set addresses on
1474 `dependency' files that have both textlow and texthigh zero. */
1476 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
1478 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
1480 p1
->texthigh
= pst
->textlow
;
1481 /* if this file has only data, then make textlow match texthigh */
1482 if (p1
->textlow
== 0)
1483 p1
->textlow
= p1
->texthigh
;
1488 /* End of kludge for patching Solaris textlow and texthigh. */
1489 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
1491 pst
->n_global_syms
=
1492 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1493 pst
->n_static_syms
=
1494 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1496 pst
->number_of_dependencies
= number_dependencies
;
1497 if (number_dependencies
)
1499 pst
->dependencies
= (struct partial_symtab
**)
1500 obstack_alloc (&objfile
->psymbol_obstack
,
1501 number_dependencies
* sizeof (struct partial_symtab
*));
1502 memcpy (pst
->dependencies
, dependency_list
,
1503 number_dependencies
* sizeof (struct partial_symtab
*));
1506 pst
->dependencies
= 0;
1508 for (i
= 0; i
< num_includes
; i
++)
1510 struct partial_symtab
*subpst
=
1511 allocate_psymtab (include_list
[i
], objfile
);
1513 subpst
->section_offsets
= pst
->section_offsets
;
1514 subpst
->read_symtab_private
=
1515 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
1516 sizeof (struct symloc
));
1520 subpst
->texthigh
= 0;
1522 /* We could save slight bits of space by only making one of these,
1523 shared by the entire set of include files. FIXME-someday. */
1524 subpst
->dependencies
= (struct partial_symtab
**)
1525 obstack_alloc (&objfile
->psymbol_obstack
,
1526 sizeof (struct partial_symtab
*));
1527 subpst
->dependencies
[0] = pst
;
1528 subpst
->number_of_dependencies
= 1;
1530 subpst
->globals_offset
=
1531 subpst
->n_global_syms
=
1532 subpst
->statics_offset
=
1533 subpst
->n_static_syms
= 0;
1537 subpst
->read_symtab
= pst
->read_symtab
;
1540 sort_pst_symbols (pst
);
1542 /* If there is already a psymtab or symtab for a file of this name, remove it.
1543 (If there is a symtab, more drastic things also happen.)
1544 This happens in VxWorks. */
1545 free_named_symtabs (pst
->filename
);
1547 if (num_includes
== 0
1548 && number_dependencies
== 0
1549 && pst
->n_global_syms
== 0
1550 && pst
->n_static_syms
== 0
1551 && has_line_numbers
== 0)
1553 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1554 it is on the obstack, but we can forget to chain it on the list. */
1555 /* Empty psymtabs happen as a result of header files which don't have
1556 any symbols in them. There can be a lot of them. But this check
1557 is wrong, in that a psymtab with N_SLINE entries but nothing else
1558 is not empty, but we don't realize that. Fixing that without slowing
1559 things down might be tricky. */
1561 discard_psymtab (pst
);
1563 /* Indicate that psymtab was thrown away. */
1564 pst
= (struct partial_symtab
*)NULL
;
1570 dbx_psymtab_to_symtab_1 (pst
)
1571 struct partial_symtab
*pst
;
1573 struct cleanup
*old_chain
;
1581 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1586 /* Read in all partial symtabs on which this one is dependent */
1587 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1588 if (!pst
->dependencies
[i
]->readin
)
1590 /* Inform about additional files that need to be read in. */
1593 fputs_filtered (" ", gdb_stdout
);
1595 fputs_filtered ("and ", gdb_stdout
);
1597 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1598 wrap_here (""); /* Flush output */
1599 gdb_flush (gdb_stdout
);
1601 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1604 if (LDSYMLEN(pst
)) /* Otherwise it's a dummy */
1606 /* Init stuff necessary for reading in symbols */
1609 old_chain
= make_cleanup (really_free_pendings
, 0);
1610 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
1611 symbol_size
= SYMBOL_SIZE (pst
);
1613 /* Read in this file's symbols */
1614 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
1615 read_ofile_symtab (pst
);
1616 sort_symtab_syms (pst
->symtab
);
1618 do_cleanups (old_chain
);
1624 /* Read in all of the symbols for a given psymtab for real.
1625 Be verbose about it if the user wants that. */
1628 dbx_psymtab_to_symtab (pst
)
1629 struct partial_symtab
*pst
;
1638 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1643 if (LDSYMLEN(pst
) || pst
->number_of_dependencies
)
1645 /* Print the message now, before reading the string table,
1646 to avoid disconcerting pauses. */
1649 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1650 gdb_flush (gdb_stdout
);
1653 sym_bfd
= pst
->objfile
->obfd
;
1655 next_symbol_text_func
= dbx_next_symbol_text
;
1657 dbx_psymtab_to_symtab_1 (pst
);
1659 /* Match with global symbols. This only needs to be done once,
1660 after all of the symtabs and dependencies have been read in. */
1661 scan_file_globals (pst
->objfile
);
1663 /* Finish up the debug error message. */
1665 printf_filtered ("done.\n");
1669 /* Read in a defined section of a specific object file's symbols. */
1672 read_ofile_symtab (pst
)
1673 struct partial_symtab
*pst
;
1675 register char *namestring
;
1676 register struct external_nlist
*bufp
;
1677 struct internal_nlist nlist
;
1679 unsigned max_symnum
;
1681 struct objfile
*objfile
;
1682 int sym_offset
; /* Offset to start of symbols to read */
1683 int sym_size
; /* Size of symbols to read */
1684 CORE_ADDR text_offset
; /* Start of text segment for symbols */
1685 int text_size
; /* Size of text segment for symbols */
1686 struct section_offsets
*section_offsets
;
1688 objfile
= pst
->objfile
;
1689 sym_offset
= LDSYMOFF(pst
);
1690 sym_size
= LDSYMLEN(pst
);
1691 text_offset
= pst
->textlow
;
1692 text_size
= pst
->texthigh
- pst
->textlow
;
1693 section_offsets
= pst
->section_offsets
;
1695 current_objfile
= objfile
;
1696 subfile_stack
= NULL
;
1698 stringtab_global
= DBX_STRINGTAB (objfile
);
1699 last_source_file
= NULL
;
1701 abfd
= objfile
->obfd
;
1702 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
1703 symbuf_end
= symbuf_idx
= 0;
1705 /* It is necessary to actually read one symbol *before* the start
1706 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1707 occurs before the N_SO symbol.
1709 Detecting this in read_dbx_symtab
1710 would slow down initial readin, so we look for it here instead. */
1711 if (!processing_acc_compilation
&& sym_offset
>= (int)symbol_size
)
1713 bfd_seek (symfile_bfd
, sym_offset
- symbol_size
, SEEK_CUR
);
1715 bufp
= &symbuf
[symbuf_idx
++];
1716 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1717 OBJSTAT (objfile
, n_stabs
++);
1721 processing_gcc_compilation
= 0;
1722 if (nlist
.n_type
== N_TEXT
)
1724 const char *tempstring
= namestring
;
1726 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1727 processing_gcc_compilation
= 1;
1728 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1729 processing_gcc_compilation
= 2;
1730 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
1732 if (STREQN (tempstring
, "__gnu_compiled", 14))
1733 processing_gcc_compilation
= 2;
1736 /* Try to select a C++ demangling based on the compilation unit
1739 if (processing_gcc_compilation
)
1741 if (AUTO_DEMANGLING
)
1743 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1749 /* The N_SO starting this symtab is the first symbol, so we
1750 better not check the symbol before it. I'm not this can
1751 happen, but it doesn't hurt to check for it. */
1752 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
1753 processing_gcc_compilation
= 0;
1756 if (symbuf_idx
== symbuf_end
)
1758 bufp
= &symbuf
[symbuf_idx
];
1759 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
1760 error("First symbol in segment of executable not a source symbol");
1762 max_symnum
= sym_size
/ symbol_size
;
1765 symnum
< max_symnum
;
1768 QUIT
; /* Allow this to be interruptable */
1769 if (symbuf_idx
== symbuf_end
)
1771 bufp
= &symbuf
[symbuf_idx
++];
1772 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1773 OBJSTAT (objfile
, n_stabs
++);
1775 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
1779 if (type
& N_STAB
) {
1780 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
1781 namestring
, section_offsets
, objfile
);
1783 /* We skip checking for a new .o or -l file; that should never
1784 happen in this routine. */
1785 else if (type
== N_TEXT
)
1787 /* I don't think this code will ever be executed, because
1788 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1789 the N_SO symbol which starts this source file.
1790 However, there is no reason not to accept
1791 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1793 if (STREQ (namestring
, GCC_COMPILED_FLAG_SYMBOL
))
1794 processing_gcc_compilation
= 1;
1795 else if (STREQ (namestring
, GCC2_COMPILED_FLAG_SYMBOL
))
1796 processing_gcc_compilation
= 2;
1798 if (AUTO_DEMANGLING
)
1800 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
1803 else if (type
& N_EXT
|| type
== (unsigned char)N_TEXT
1804 || type
== (unsigned char)N_NBTEXT
1806 /* Global symbol: see if we came across a dbx defintion for
1807 a corresponding symbol. If so, store the value. Remove
1808 syms from the chain when their values are stored, but
1809 search the whole chain, as there may be several syms from
1810 different files with the same name. */
1811 /* This is probably not true. Since the files will be read
1812 in one at a time, each reference to a global symbol will
1813 be satisfied in each file as it appears. So we skip this
1819 current_objfile
= NULL
;
1821 /* In a Solaris elf file, this variable, which comes from the
1822 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1823 which comes from pst->textlow is correct. */
1824 if (last_source_start_addr
== 0)
1825 last_source_start_addr
= text_offset
;
1827 /* In reordered executables last_source_start_addr may not be the
1828 lower bound for this symtab, instead use text_offset which comes
1829 from pst->textlow which is correct. */
1830 if (last_source_start_addr
> text_offset
)
1831 last_source_start_addr
= text_offset
;
1833 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
, SECT_OFF_TEXT
);
1835 /* Process items which we had to "process_later" due to dependancies
1837 process_now (objfile
);
1843 /* This handles a single symbol from the symbol-file, building symbols
1844 into a GDB symtab. It takes these arguments and an implicit argument.
1846 TYPE is the type field of the ".stab" symbol entry.
1847 DESC is the desc field of the ".stab" entry.
1848 VALU is the value field of the ".stab" entry.
1849 NAME is the symbol name, in our address space.
1850 SECTION_OFFSETS is a set of amounts by which the sections of this object
1851 file were relocated when it was loaded into memory.
1852 All symbols that refer
1853 to memory locations need to be offset by these amounts.
1854 OBJFILE is the object file from which we are reading symbols.
1855 It is used in end_symtab. */
1858 process_one_symbol (type
, desc
, valu
, name
, section_offsets
, objfile
)
1862 struct section_offsets
*section_offsets
;
1863 struct objfile
*objfile
;
1865 #ifdef SUN_FIXED_LBRAC_BUG
1866 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
1867 to correct the address of N_LBRAC's. If it is not defined, then
1868 we never need to correct the addresses. */
1870 /* This records the last pc address we've seen. We depend on there being
1871 an SLINE or FUN or SO before the first LBRAC, since the variable does
1872 not get reset in between reads of different symbol files. */
1873 static CORE_ADDR last_pc_address
;
1876 register struct context_stack
*new;
1877 /* This remembers the address of the start of a function. It is used
1878 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
1879 relative to the current function's start address. On systems
1880 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
1881 used to relocate these symbol types rather than SECTION_OFFSETS. */
1882 static CORE_ADDR function_start_offset
;
1884 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
1885 file. Used to detect the SunPRO solaris compiler. */
1886 static int n_opt_found
;
1888 /* The stab type used for the definition of the last function.
1889 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1890 static int function_stab_type
= 0;
1892 if (!block_address_function_relative
)
1893 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
1894 function start address, so just use the text offset. */
1895 function_start_offset
= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1897 /* Something is wrong if we see real data before
1898 seeing a source file name. */
1900 if (last_source_file
== NULL
&& type
!= (unsigned char)N_SO
)
1902 /* Ignore any symbols which appear before an N_SO symbol. Currently
1903 no one puts symbols there, but we should deal gracefully with the
1904 case. A complain()t might be in order (if !IGNORE_SYMBOL (type)),
1905 but this should not be an error (). */
1914 if (*name
== '\000')
1916 /* This N_FUN marks the end of a function. This closes off the
1918 within_function
= 0;
1919 new = pop_context ();
1921 /* Make a block for the local symbols within. */
1922 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1923 new->start_addr
, new->start_addr
+ valu
,
1928 /* Relocate for dynamic loading */
1929 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1930 #ifdef SMASH_TEXT_ADDRESS
1931 SMASH_TEXT_ADDRESS (valu
);
1933 goto define_a_symbol
;
1936 /* This "symbol" just indicates the start of an inner lexical
1937 context within a function. */
1939 /* Ignore extra outermost context from SunPRO cc and acc. */
1940 if (n_opt_found
&& desc
== 1)
1943 if (block_address_function_relative
)
1944 /* Relocate for Sun ELF acc fn-relative syms. */
1945 valu
+= function_start_offset
;
1947 /* On most machines, the block addresses are relative to the
1948 N_SO, the linker did not relocate them (sigh). */
1949 valu
+= last_source_start_addr
;
1951 #ifdef SUN_FIXED_LBRAC_BUG
1952 if (!SUN_FIXED_LBRAC_BUG
&& valu
< last_pc_address
) {
1953 /* Patch current LBRAC pc value to match last handy pc value */
1954 complain (&lbrac_complaint
);
1955 valu
= last_pc_address
;
1958 new = push_context (desc
, valu
);
1962 /* This "symbol" just indicates the end of an inner lexical
1963 context that was started with N_LBRAC. */
1965 /* Ignore extra outermost context from SunPRO cc and acc. */
1966 if (n_opt_found
&& desc
== 1)
1969 if (block_address_function_relative
)
1970 /* Relocate for Sun ELF acc fn-relative syms. */
1971 valu
+= function_start_offset
;
1973 /* On most machines, the block addresses are relative to the
1974 N_SO, the linker did not relocate them (sigh). */
1975 valu
+= last_source_start_addr
;
1977 new = pop_context();
1978 if (desc
!= new->depth
)
1979 complain (&lbrac_mismatch_complaint
, symnum
);
1981 /* Some compilers put the variable decls inside of an
1982 LBRAC/RBRAC block. This macro should be nonzero if this
1983 is true. DESC is N_DESC from the N_RBRAC symbol.
1984 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
1985 or the GCC2_COMPILED_SYMBOL. */
1986 #if !defined (VARIABLES_INSIDE_BLOCK)
1987 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
1990 /* Can only use new->locals as local symbols here if we're in
1991 gcc or on a machine that puts them before the lbrack. */
1992 if (!VARIABLES_INSIDE_BLOCK(desc
, processing_gcc_compilation
))
1993 local_symbols
= new->locals
;
1995 if (context_stack_depth
1996 > !VARIABLES_INSIDE_BLOCK(desc
, processing_gcc_compilation
))
1998 /* This is not the outermost LBRAC...RBRAC pair in the function,
1999 its local symbols preceded it, and are the ones just recovered
2000 from the context stack. Define the block for them (but don't
2001 bother if the block contains no symbols. Should we complain
2002 on blocks without symbols? I can't think of any useful purpose
2004 if (local_symbols
!= NULL
)
2006 /* Muzzle a compiler bug that makes end < start. (which
2007 compilers? Is this ever harmful?). */
2008 if (new->start_addr
> valu
)
2010 complain (&lbrac_rbrac_complaint
);
2011 new->start_addr
= valu
;
2013 /* Make a block for the local symbols within. */
2014 finish_block (0, &local_symbols
, new->old_blocks
,
2015 new->start_addr
, valu
, objfile
);
2020 /* This is the outermost LBRAC...RBRAC pair. There is no
2021 need to do anything; leave the symbols that preceded it
2022 to be attached to the function's own block. We need to
2023 indicate that we just moved outside of the function. */
2024 within_function
= 0;
2027 if (VARIABLES_INSIDE_BLOCK(desc
, processing_gcc_compilation
))
2028 /* Now pop locals of block just finished. */
2029 local_symbols
= new->locals
;
2034 /* This kind of symbol indicates the start of an object file. */
2035 /* Relocate for dynamic loading */
2036 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2040 /* This type of symbol indicates the start of data
2041 for one source file.
2042 Finish the symbol table of the previous source file
2043 (if any) and start accumulating a new symbol table. */
2044 /* Relocate for dynamic loading */
2045 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2049 #ifdef SUN_FIXED_LBRAC_BUG
2050 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2053 #ifdef PCC_SOL_BROKEN
2054 /* pcc bug, occasionally puts out SO for SOL. */
2055 if (context_stack_depth
> 0)
2057 start_subfile (name
, NULL
);
2061 if (last_source_file
)
2063 /* Check if previous symbol was also an N_SO (with some
2064 sanity checks). If so, that one was actually the directory
2065 name, and the current one is the real file name.
2067 if (previous_stab_code
== (unsigned char) N_SO
)
2069 patch_subfile_names (current_subfile
, name
);
2070 break; /* Ignore repeated SOs */
2072 end_symtab (valu
, objfile
, SECT_OFF_TEXT
);
2076 /* Null name means this just marks the end of text for this .o file.
2077 Don't start a new symtab in this case. */
2078 if (*name
== '\000')
2081 if (block_address_function_relative
)
2082 function_start_offset
= 0;
2085 start_symtab (name
, NULL
, valu
);
2086 record_debugformat ("stabs");
2090 /* This type of symbol indicates the start of data for
2091 a sub-source-file, one whose contents were copied or
2092 included in the compilation of the main source file
2093 (whose name was given in the N_SO symbol.) */
2094 /* Relocate for dynamic loading */
2095 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2096 start_subfile (name
, current_subfile
->dirname
);
2101 add_new_header_file (name
, valu
);
2102 start_subfile (name
, current_subfile
->dirname
);
2106 start_subfile (pop_subfile (), current_subfile
->dirname
);
2110 add_old_header_file (name
, valu
);
2114 /* This type of "symbol" really just records
2115 one line-number -- core-address correspondence.
2116 Enter it in the line list for this symbol table. */
2117 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
2118 valu
+= function_start_offset
;
2119 #ifdef SUN_FIXED_LBRAC_BUG
2120 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2122 record_line (current_subfile
, desc
, valu
);
2126 common_block_start (name
, objfile
);
2130 common_block_end (objfile
);
2133 /* The following symbol types need to have the appropriate offset added
2134 to their value; then we process symbol definitions in the name. */
2136 case N_STSYM
: /* Static symbol in data seg */
2137 case N_LCSYM
: /* Static symbol in BSS seg */
2138 case N_ROSYM
: /* Static symbol in Read-only data seg */
2139 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2140 Solaris2's stabs-in-elf makes *most* symbols relative
2141 but leaves a few absolute (at least for Solaris 2.1 and version
2142 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
2143 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
2144 .stab "foo:V...",N_STSYM is relative (section base subtracted).
2145 This leaves us no choice but to search for the 'S' or 'V'...
2146 (or pass the whole section_offsets stuff down ONE MORE function
2147 call level, which we really don't want to do). */
2151 /* .o files and NLMs have non-zero text seg offsets, but don't need
2152 their static syms offset in this fashion. XXX - This is really a
2153 crock that should be fixed in the solib handling code so that I
2154 don't have to work around it here. */
2156 if (!symfile_relocatable
)
2158 p
= strchr (name
, ':');
2159 if (p
!= 0 && p
[1] == 'S')
2161 /* The linker relocated it. We don't want to add an
2162 elfstab_offset_sections-type offset, but we *do* want
2163 to add whatever solib.c passed to symbol_file_add as
2164 addr (this is known to affect SunOS4, and I suspect ELF
2165 too). Since elfstab_offset_sections currently does not
2166 muck with the text offset (there is no Ttext.text
2167 symbol), we can get addr from the text offset. If
2168 elfstab_offset_sections ever starts dealing with the
2169 text offset, and we still need to do this, we need to
2170 invent a SECT_OFF_ADDR_KLUDGE or something. */
2171 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2172 goto define_a_symbol
;
2175 /* Since it's not the kludge case, re-dispatch to the right handler. */
2177 case N_STSYM
: goto case_N_STSYM
;
2178 case N_LCSYM
: goto case_N_LCSYM
;
2179 case N_ROSYM
: goto case_N_ROSYM
;
2184 case_N_STSYM
: /* Static symbol in data seg */
2185 case N_DSLINE
: /* Source line number, data seg */
2186 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA
);
2187 goto define_a_symbol
;
2189 case_N_LCSYM
: /* Static symbol in BSS seg */
2190 case N_BSLINE
: /* Source line number, bss seg */
2191 /* N_BROWS: overlaps with N_BSLINE */
2192 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS
);
2193 goto define_a_symbol
;
2195 case_N_ROSYM
: /* Static symbol in Read-only data seg */
2196 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA
);
2197 goto define_a_symbol
;
2199 case N_ENTRY
: /* Alternate entry point */
2200 /* Relocate for dynamic loading */
2201 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
2202 goto define_a_symbol
;
2204 /* The following symbol types we don't know how to process. Handle
2205 them in a "default" way, but complain to people who care. */
2207 case N_CATCH
: /* Exception handler catcher */
2208 case N_EHDECL
: /* Exception handler name */
2209 case N_PC
: /* Global symbol in Pascal */
2210 case N_M2C
: /* Modula-2 compilation unit */
2211 /* N_MOD2: overlaps with N_EHDECL */
2212 case N_SCOPE
: /* Modula-2 scope information */
2213 case N_ECOML
: /* End common (local name) */
2214 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
2219 complain (&unknown_symtype_complaint
, local_hex_string (type
));
2222 /* The following symbol types don't need the address field relocated,
2223 since it is either unused, or is absolute. */
2225 case N_GSYM
: /* Global variable */
2226 case N_NSYMS
: /* Number of symbols (ultrix) */
2227 case N_NOMAP
: /* No map? (ultrix) */
2228 case N_RSYM
: /* Register variable */
2229 case N_DEFD
: /* Modula-2 GNU module dependency */
2230 case N_SSYM
: /* Struct or union element */
2231 case N_LSYM
: /* Local symbol in stack */
2232 case N_PSYM
: /* Parameter variable */
2233 case N_LENG
: /* Length of preceding symbol type */
2237 char *colon_pos
= strchr (name
, ':');
2238 if (colon_pos
== NULL
)
2241 deftype
= colon_pos
[1];
2247 function_stab_type
= type
;
2249 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2250 /* Deal with the SunPRO 3.0 compiler which omits the address
2251 from N_FUN symbols. */
2253 && valu
== ANOFFSET (section_offsets
, SECT_OFF_TEXT
))
2255 struct minimal_symbol
*msym
;
2259 p
= strchr (name
, ':');
2264 strncpy (p
, name
, n
);
2267 msym
= lookup_minimal_symbol (p
, last_source_file
,
2270 valu
= SYMBOL_VALUE_ADDRESS (msym
);
2274 #ifdef SUN_FIXED_LBRAC_BUG
2275 /* The Sun acc compiler, under SunOS4, puts out
2276 functions with N_GSYM or N_STSYM. The problem is
2277 that the address of the symbol is no good (for N_GSYM
2278 it doesn't even attept an address; for N_STSYM it
2279 puts out an address but then it gets relocated
2280 relative to the data segment, not the text segment).
2281 Currently we can't fix this up later as we do for
2282 some types of symbol in scan_file_globals.
2283 Fortunately we do have a way of finding the address -
2284 we know that the value in last_pc_address is either
2285 the one we want (if we're dealing with the first
2286 function in an object file), or somewhere in the
2287 previous function. This means that we can use the
2288 minimal symbol table to get the address. */
2290 /* Starting with release 3.0, the Sun acc compiler,
2291 under SunOS4, puts out functions with N_FUN and a value
2292 of zero. This gets relocated to the start of the text
2293 segment of the module, which is no good either.
2294 Under SunOS4 we can deal with this as N_SLINE and N_SO
2295 entries contain valid absolute addresses.
2296 Release 3.0 acc also puts out N_OPT entries, which makes
2297 it possible to discern acc from cc or gcc. */
2299 if (type
== N_GSYM
|| type
== N_STSYM
2301 && n_opt_found
&& !block_address_function_relative
))
2303 struct minimal_symbol
*m
;
2304 int l
= colon_pos
- name
;
2306 m
= lookup_minimal_symbol_by_pc (last_pc_address
);
2307 if (m
&& STREQN (SYMBOL_NAME (m
), name
, l
)
2308 && SYMBOL_NAME (m
) [l
] == '\0')
2309 /* last_pc_address was in this function */
2310 valu
= SYMBOL_VALUE (m
);
2311 else if (m
&& SYMBOL_NAME (m
+1)
2312 && STREQN (SYMBOL_NAME (m
+1), name
, l
)
2313 && SYMBOL_NAME (m
+1) [l
] == '\0')
2314 /* last_pc_address was in last function */
2315 valu
= SYMBOL_VALUE (m
+1);
2317 /* Not found - use last_pc_address (for finish_block) */
2318 valu
= last_pc_address
;
2321 last_pc_address
= valu
; /* Save for SunOS bug circumcision */
2324 if (block_address_function_relative
)
2325 /* For Solaris 2.0 compilers, the block addresses and
2326 N_SLINE's are relative to the start of the
2327 function. On normal systems, and when using gcc on
2328 Solaris 2.0, these addresses are just absolute, or
2329 relative to the N_SO, depending on
2330 BLOCK_ADDRESS_ABSOLUTE. */
2331 function_start_offset
= valu
;
2333 within_function
= 1;
2334 if (context_stack_depth
> 0)
2336 new = pop_context ();
2337 /* Make a block for the local symbols within. */
2338 finish_block (new->name
, &local_symbols
, new->old_blocks
,
2339 new->start_addr
, valu
, objfile
);
2341 /* Stack must be empty now. */
2342 if (context_stack_depth
!= 0)
2343 complain (&lbrac_unmatched_complaint
, symnum
);
2345 new = push_context (0, valu
);
2346 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
2350 define_symbol (valu
, name
, desc
, type
, objfile
);
2356 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2357 for a bunch of other flags, too. Someday we may parse their
2358 flags; for now we ignore theirs and hope they'll ignore ours. */
2359 case N_OPT
: /* Solaris 2: Compiler options */
2362 if (STREQ (name
, GCC2_COMPILED_FLAG_SYMBOL
))
2364 processing_gcc_compilation
= 2;
2365 #if 1 /* Works, but is experimental. -fnf */
2366 if (AUTO_DEMANGLING
)
2368 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2377 /* The following symbol types can be ignored. */
2378 case N_OBJ
: /* Solaris 2: Object file dir and name */
2379 /* N_UNDF: Solaris 2: file separator mark */
2380 /* N_UNDF: -- we will never encounter it, since we only process one
2381 file's symbols at once. */
2382 case N_ENDM
: /* Solaris 2: End of module */
2383 case N_MAIN
: /* Name of main routine. */
2387 /* '#' is a GNU C extension to allow one symbol to refer to another
2390 Generally this is used so that an alias can refer to its main
2394 /* Initialize symbol reference names and determine if this is
2395 a definition. If symbol reference is being defined, go
2396 ahead and add it. Otherwise, just return sym. */
2401 /* If this stab defines a new reference ID that is not on the
2402 reference list, then put it on the reference list.
2404 We go ahead and advance NAME past the reference, even though
2405 it is not strictly necessary at this time. */
2406 refnum
= symbol_reference_defined (&s
);
2408 if (!ref_search (refnum
))
2409 ref_add (refnum
, 0, name
, valu
);
2414 previous_stab_code
= type
;
2417 /* FIXME: The only difference between this and elfstab_build_psymtabs
2418 is the call to install_minimal_symbols for elf, and the support for
2419 split sections. If the differences are really that small, the code
2420 should be shared. */
2422 /* Scan and build partial symbols for an coff symbol file.
2423 The coff file has already been processed to get its minimal symbols.
2425 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2428 OBJFILE is the object file we are reading symbols from.
2429 ADDR is the address relative to which the symbols are (e.g.
2430 the base address of the text segment).
2431 MAINLINE is true if we are reading the main symbol
2432 table (as opposed to a shared lib or dynamically loaded file).
2433 TEXTADDR is the address of the text section.
2434 TEXTSIZE is the size of the text section.
2435 STABSECTS is the list of .stab sections in OBJFILE.
2436 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2437 .stabstr section exists.
2439 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2440 adjusted for coff details. */
2443 coffstab_build_psymtabs (objfile
, section_offsets
, mainline
,
2444 textaddr
, textsize
, stabsects
,
2445 stabstroffset
, stabstrsize
)
2446 struct objfile
*objfile
;
2447 struct section_offsets
*section_offsets
;
2450 unsigned int textsize
;
2451 struct stab_section_list
*stabsects
;
2452 file_ptr stabstroffset
;
2453 unsigned int stabstrsize
;
2456 bfd
*sym_bfd
= objfile
->obfd
;
2457 char *name
= bfd_get_filename (sym_bfd
);
2458 struct dbx_symfile_info
*info
;
2459 unsigned int stabsize
;
2461 /* There is already a dbx_symfile_info allocated by our caller.
2462 It might even contain some info from the coff symtab to help us. */
2463 info
= objfile
->sym_stab_info
;
2465 DBX_TEXT_ADDR (objfile
) = textaddr
;
2466 DBX_TEXT_SIZE (objfile
) = textsize
;
2468 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2469 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
2470 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2472 if (stabstrsize
> bfd_get_size (sym_bfd
))
2473 error ("ridiculous string table size: %d bytes", stabstrsize
);
2474 DBX_STRINGTAB (objfile
) = (char *)
2475 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+1);
2476 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+1);
2478 /* Now read in the string table in one big gulp. */
2480 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2482 perror_with_name (name
);
2483 val
= bfd_read (DBX_STRINGTAB (objfile
), stabstrsize
, 1, sym_bfd
);
2484 if (val
!= stabstrsize
)
2485 perror_with_name (name
);
2487 stabsread_new_init ();
2488 buildsym_new_init ();
2489 free_header_files ();
2490 init_header_files ();
2492 processing_acc_compilation
= 1;
2494 /* In a coff file, we've already installed the minimal symbols that came
2495 from the coff (non-stab) symbol table, so always act like an
2496 incremental load here. */
2497 if (stabsects
->next
== NULL
)
2499 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
2500 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2501 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
2505 struct stab_section_list
*stabsect
;
2507 DBX_SYMCOUNT (objfile
) = 0;
2508 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
2510 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
2511 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2514 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
2516 symbuf_sections
= stabsects
->next
;
2517 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
2521 dbx_symfile_read (objfile
, section_offsets
, 0);
2524 /* Scan and build partial symbols for an ELF symbol file.
2525 This ELF file has already been processed to get its minimal symbols,
2526 and any DWARF symbols that were in it.
2528 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2531 OBJFILE is the object file we are reading symbols from.
2532 ADDR is the address relative to which the symbols are (e.g.
2533 the base address of the text segment).
2534 MAINLINE is true if we are reading the main symbol
2535 table (as opposed to a shared lib or dynamically loaded file).
2536 STABOFFSET and STABSIZE define the location in OBJFILE where the .stab
2538 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2539 .stabstr section exists.
2541 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2542 adjusted for elf details. */
2545 elfstab_build_psymtabs (objfile
, section_offsets
, mainline
,
2546 staboffset
, stabsize
,
2547 stabstroffset
, stabstrsize
)
2548 struct objfile
*objfile
;
2549 struct section_offsets
*section_offsets
;
2551 file_ptr staboffset
;
2552 unsigned int stabsize
;
2553 file_ptr stabstroffset
;
2554 unsigned int stabstrsize
;
2557 bfd
*sym_bfd
= objfile
->obfd
;
2558 char *name
= bfd_get_filename (sym_bfd
);
2559 struct dbx_symfile_info
*info
;
2560 asection
*text_sect
;
2562 /* There is already a dbx_symfile_info allocated by our caller.
2563 It might even contain some info from the ELF symtab to help us. */
2564 info
= objfile
->sym_stab_info
;
2566 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
2568 error ("Can't find .text section in symbol file");
2569 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
2570 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
2572 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2573 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
2574 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2575 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2576 DBX_SYMTAB_OFFSET (objfile
) = staboffset
;
2578 if (stabstrsize
> bfd_get_size (sym_bfd
))
2579 error ("ridiculous string table size: %d bytes", stabstrsize
);
2580 DBX_STRINGTAB (objfile
) = (char *)
2581 obstack_alloc (&objfile
->psymbol_obstack
, stabstrsize
+1);
2582 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+1);
2584 /* Now read in the string table in one big gulp. */
2586 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2588 perror_with_name (name
);
2589 val
= bfd_read (DBX_STRINGTAB (objfile
), stabstrsize
, 1, sym_bfd
);
2590 if (val
!= stabstrsize
)
2591 perror_with_name (name
);
2593 stabsread_new_init ();
2594 buildsym_new_init ();
2595 free_header_files ();
2596 init_header_files ();
2597 install_minimal_symbols (objfile
);
2599 processing_acc_compilation
= 1;
2601 /* In an elf file, we've already installed the minimal symbols that came
2602 from the elf (non-stab) symbol table, so always act like an
2603 incremental load here. */
2604 dbx_symfile_read (objfile
, section_offsets
, 0);
2607 /* Scan and build partial symbols for a file with special sections for stabs
2608 and stabstrings. The file has already been processed to get its minimal
2609 symbols, and any other symbols that might be necessary to resolve GSYMs.
2611 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2614 OBJFILE is the object file we are reading symbols from.
2615 ADDR is the address relative to which the symbols are (e.g. the base address
2616 of the text segment).
2617 MAINLINE is true if we are reading the main symbol table (as opposed to a
2618 shared lib or dynamically loaded file).
2619 STAB_NAME is the name of the section that contains the stabs.
2620 STABSTR_NAME is the name of the section that contains the stab strings.
2622 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
2625 stabsect_build_psymtabs (objfile
, section_offsets
, mainline
, stab_name
,
2626 stabstr_name
, text_name
)
2627 struct objfile
*objfile
;
2628 struct section_offsets
*section_offsets
;
2635 bfd
*sym_bfd
= objfile
->obfd
;
2636 char *name
= bfd_get_filename (sym_bfd
);
2638 asection
*stabstrsect
;
2639 asection
*text_sect
;
2641 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
2642 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
2648 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
2649 stab_name
, stabstr_name
);
2651 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
2652 xmalloc (sizeof (struct dbx_symfile_info
));
2653 memset (objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
2655 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
2657 error ("Can't find %s section in symbol file", text_name
);
2658 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
2659 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
2661 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
2662 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
2663 / DBX_SYMBOL_SIZE (objfile
);
2664 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
2665 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
2667 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
2668 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile
));
2669 DBX_STRINGTAB (objfile
) = (char *)
2670 obstack_alloc (&objfile
->psymbol_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
2671 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
2673 /* Now read in the string table in one big gulp. */
2675 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
2676 stabstrsect
, /* bfd section */
2677 DBX_STRINGTAB (objfile
), /* input buffer */
2678 0, /* offset into section */
2679 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
2682 perror_with_name (name
);
2684 stabsread_new_init ();
2685 buildsym_new_init ();
2686 free_header_files ();
2687 init_header_files ();
2688 install_minimal_symbols (objfile
);
2690 /* Now, do an incremental load */
2692 processing_acc_compilation
= 1;
2693 dbx_symfile_read (objfile
, section_offsets
, 0);
2696 static struct sym_fns aout_sym_fns
=
2698 bfd_target_aout_flavour
,
2699 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2700 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2701 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
2702 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
2703 default_symfile_offsets
,
2704 /* sym_offsets: parse user's offsets to internal form */
2705 NULL
/* next: pointer to next struct sym_fns */
2709 _initialize_dbxread ()
2711 add_symtab_fns(&aout_sym_fns
);