1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2017 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* This module provides three functions: dbx_symfile_init,
20 which initializes to read a symbol file; dbx_new_init, which
21 discards existing cached information when all symbols are being
22 discarded; and dbx_symfile_read, which reads a symbol table
25 dbx_symfile_read only does the minimum work necessary for letting the
26 user "name" things symbolically; it does not read the entire symtab.
27 Instead, it reads the external and static symbols and puts them in partial
28 symbol tables. When more extensive information is requested of a
29 file, the corresponding partial symbol table is mutated into a full
30 fledged symbol table by going back and reading the symbols
31 for real. dbx_psymtab_to_symtab() is the function that does this */
34 #if defined(__CYGNUSCLIB__)
35 #include <sys/types.h>
39 #include "gdb_obstack.h"
42 #include "breakpoint.h"
44 #include "gdbcore.h" /* for bfd stuff */
45 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
46 #include "filenames.h"
49 #include "stabsread.h"
50 #include "gdb-stabs.h"
52 #include "complaints.h"
54 #include "cp-support.h"
58 #include "aout/aout64.h"
59 #include "aout/stab_gnu.h" /* We always use GNU stabs, not
63 /* Key for dbx-associated data. */
65 const struct objfile_data
*dbx_objfile_data_key
;
67 /* We put a pointer to this structure in the read_symtab_private field
72 /* Offset within the file symbol table of first local symbol for this
77 /* Length (in bytes) of the section of the symbol table devoted to
78 this file's symbols (actually, the section bracketed may contain
79 more than just this file's symbols). If ldsymlen is 0, the only
80 reason for this thing's existence is the dependency list. Nothing
81 else will happen when it is read in. */
85 /* The size of each symbol in the symbol file (in external form). */
89 /* Further information needed to locate the symbols if they are in
94 int file_string_offset
;
97 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
98 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
99 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
100 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
101 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
102 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
103 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
106 /* The objfile we are currently reading. */
108 static struct objfile
*dbxread_objfile
;
110 /* Remember what we deduced to be the source language of this psymtab. */
112 static enum language psymtab_language
= language_unknown
;
114 /* The BFD for this file -- implicit parameter to next_symbol_text. */
116 static bfd
*symfile_bfd
;
118 /* The size of each symbol in the symbol file (in external form).
119 This is set by dbx_symfile_read when building psymtabs, and by
120 dbx_psymtab_to_symtab when building symtabs. */
122 static unsigned symbol_size
;
124 /* This is the offset of the symbol table in the executable file. */
126 static unsigned symbol_table_offset
;
128 /* This is the offset of the string table in the executable file. */
130 static unsigned string_table_offset
;
132 /* For elf+stab executables, the n_strx field is not a simple index
133 into the string table. Instead, each .o file has a base offset in
134 the string table, and the associated symbols contain offsets from
135 this base. The following two variables contain the base offset for
136 the current and next .o files. */
138 static unsigned int file_string_table_offset
;
139 static unsigned int next_file_string_table_offset
;
141 /* .o and NLM files contain unrelocated addresses which are based at
142 0. When non-zero, this flag disables some of the special cases for
143 Solaris elf+stab text addresses at location 0. */
145 static int symfile_relocatable
= 0;
148 /* The lowest text address we have yet encountered. This is needed
149 because in an a.out file, there is no header field which tells us
150 what address the program is actually going to be loaded at, so we
151 need to make guesses based on the symbols (which *are* relocated to
152 reflect the address it will be loaded at). */
154 static CORE_ADDR lowest_text_address
;
156 /* Non-zero if there is any line number info in the objfile. Prevents
157 dbx_end_psymtab from discarding an otherwise empty psymtab. */
159 static int has_line_numbers
;
161 /* Complaints about the symbols we have encountered. */
164 unknown_symtype_complaint (const char *arg1
)
166 complaint (&symfile_complaints
, _("unknown symbol type %s"), arg1
);
170 lbrac_mismatch_complaint (int arg1
)
172 complaint (&symfile_complaints
,
173 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1
);
177 repeated_header_complaint (const char *arg1
, int arg2
)
179 complaint (&symfile_complaints
,
180 _("\"repeated\" header file %s not "
181 "previously seen, at symtab pos %d"),
185 /* find_text_range --- find start and end of loadable code sections
187 The find_text_range function finds the shortest address range that
188 encloses all sections containing executable code, and stores it in
189 objfile's text_addr and text_size members.
191 dbx_symfile_read will use this to finish off the partial symbol
192 table, in some cases. */
195 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
202 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
203 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
205 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
206 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
210 if (sec_start
< start
)
225 error (_("Can't find any code sections in symbol file"));
227 DBX_TEXT_ADDR (objfile
) = start
;
228 DBX_TEXT_SIZE (objfile
) = end
- start
;
233 /* During initial symbol readin, we need to have a structure to keep
234 track of which psymtabs have which bincls in them. This structure
235 is used during readin to setup the list of dependencies within each
236 partial symbol table. */
238 struct header_file_location
240 char *name
; /* Name of header file */
241 int instance
; /* See above */
242 struct partial_symtab
*pst
; /* Partial symtab that has the
243 BINCL/EINCL defs for this file. */
246 /* The actual list and controling variables. */
247 static struct header_file_location
*bincl_list
, *next_bincl
;
248 static int bincls_allocated
;
250 /* Local function prototypes. */
252 extern void _initialize_dbxread (void);
254 static void read_ofile_symtab (struct objfile
*, struct partial_symtab
*);
256 static void dbx_read_symtab (struct partial_symtab
*self
,
257 struct objfile
*objfile
);
259 static void dbx_psymtab_to_symtab_1 (struct objfile
*, struct partial_symtab
*);
261 static void read_dbx_symtab (minimal_symbol_reader
&, struct objfile
*);
263 static void free_bincl_list (struct objfile
*);
265 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
267 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
269 static void init_bincl_list (int, struct objfile
*);
271 static char *dbx_next_symbol_text (struct objfile
*);
273 static void fill_symbuf (bfd
*);
275 static void dbx_symfile_init (struct objfile
*);
277 static void dbx_new_init (struct objfile
*);
279 static void dbx_symfile_read (struct objfile
*, symfile_add_flags
);
281 static void dbx_symfile_finish (struct objfile
*);
283 static void record_minimal_symbol (minimal_symbol_reader
&,
284 const char *, CORE_ADDR
, int,
287 static void add_new_header_file (char *, int);
289 static void add_old_header_file (char *, int);
291 static void add_this_object_header_file (int);
293 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
295 struct partial_symbol
**,
296 struct partial_symbol
**);
298 /* Free up old header file tables. */
301 free_header_files (void)
303 if (this_object_header_files
)
305 xfree (this_object_header_files
);
306 this_object_header_files
= NULL
;
308 n_allocated_this_object_header_files
= 0;
311 /* Allocate new header file tables. */
314 init_header_files (void)
316 n_allocated_this_object_header_files
= 10;
317 this_object_header_files
= XNEWVEC (int, 10);
320 /* Add header file number I for this object file
321 at the next successive FILENUM. */
324 add_this_object_header_file (int i
)
326 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
328 n_allocated_this_object_header_files
*= 2;
329 this_object_header_files
330 = (int *) xrealloc ((char *) this_object_header_files
,
331 n_allocated_this_object_header_files
* sizeof (int));
334 this_object_header_files
[n_this_object_header_files
++] = i
;
337 /* Add to this file an "old" header file, one already seen in
338 a previous object file. NAME is the header file's name.
339 INSTANCE is its instance code, to select among multiple
340 symbol tables for the same header file. */
343 add_old_header_file (char *name
, int instance
)
345 struct header_file
*p
= HEADER_FILES (dbxread_objfile
);
348 for (i
= 0; i
< N_HEADER_FILES (dbxread_objfile
); i
++)
349 if (filename_cmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
351 add_this_object_header_file (i
);
354 repeated_header_complaint (name
, symnum
);
357 /* Add to this file a "new" header file: definitions for its types follow.
358 NAME is the header file's name.
359 Most often this happens only once for each distinct header file,
360 but not necessarily. If it happens more than once, INSTANCE has
361 a different value each time, and references to the header file
362 use INSTANCE values to select among them.
364 dbx output contains "begin" and "end" markers for each new header file,
365 but at this level we just need to know which files there have been;
366 so we record the file when its "begin" is seen and ignore the "end". */
369 add_new_header_file (char *name
, int instance
)
372 struct header_file
*hfile
;
374 /* Make sure there is room for one more header file. */
376 i
= N_ALLOCATED_HEADER_FILES (dbxread_objfile
);
378 if (N_HEADER_FILES (dbxread_objfile
) == i
)
382 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = 10;
383 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
384 xmalloc (10 * sizeof (struct header_file
));
389 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = i
;
390 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
391 xrealloc ((char *) HEADER_FILES (dbxread_objfile
),
392 (i
* sizeof (struct header_file
)));
396 /* Create an entry for this header file. */
398 i
= N_HEADER_FILES (dbxread_objfile
)++;
399 hfile
= HEADER_FILES (dbxread_objfile
) + i
;
400 hfile
->name
= xstrdup (name
);
401 hfile
->instance
= instance
;
403 hfile
->vector
= XCNEWVEC (struct type
*, 10);
405 add_this_object_header_file (i
);
409 static struct type
**
410 explicit_lookup_type (int real_filenum
, int index
)
412 struct header_file
*f
= &HEADER_FILES (dbxread_objfile
)[real_filenum
];
414 if (index
>= f
->length
)
417 f
->vector
= (struct type
**)
418 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
419 memset (&f
->vector
[f
->length
/ 2],
420 '\0', f
->length
* sizeof (struct type
*) / 2);
422 return &f
->vector
[index
];
427 record_minimal_symbol (minimal_symbol_reader
&reader
,
428 const char *name
, CORE_ADDR address
, int type
,
429 struct objfile
*objfile
)
431 enum minimal_symbol_type ms_type
;
438 section
= SECT_OFF_TEXT (objfile
);
442 section
= SECT_OFF_DATA (objfile
);
446 section
= SECT_OFF_BSS (objfile
);
455 section
= SECT_OFF_DATA (objfile
);
458 /* I don't think this type actually exists; since a N_SETV is the result
459 of going over many .o files, it doesn't make sense to have one
461 ms_type
= mst_file_data
;
462 section
= SECT_OFF_DATA (objfile
);
469 ms_type
= mst_file_text
;
470 section
= SECT_OFF_TEXT (objfile
);
473 ms_type
= mst_file_data
;
475 /* Check for __DYNAMIC, which is used by Sun shared libraries.
476 Record it as global even if it's local, not global, so
477 lookup_minimal_symbol can find it. We don't check symbol_leading_char
478 because for SunOS4 it always is '_'. */
479 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
482 /* Same with virtual function tables, both global and static. */
484 const char *tempstring
= name
;
486 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
488 if (is_vtable_name (tempstring
))
491 section
= SECT_OFF_DATA (objfile
);
494 ms_type
= mst_file_bss
;
495 section
= SECT_OFF_BSS (objfile
);
498 ms_type
= mst_unknown
;
503 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
504 && address
< lowest_text_address
)
505 lowest_text_address
= address
;
507 reader
.record_with_info (name
, address
, ms_type
, section
);
510 /* Scan and build partial symbols for a symbol file.
511 We have been initialized by a call to dbx_symfile_init, which
512 put all the relevant info into a "struct dbx_symfile_info",
513 hung off the objfile structure. */
516 dbx_symfile_read (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
520 struct cleanup
*back_to
;
522 sym_bfd
= objfile
->obfd
;
524 /* .o and .nlm files are relocatables with text, data and bss segs based at
525 0. This flag disables special (Solaris stabs-in-elf only) fixups for
526 symbols with a value of 0. */
528 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
530 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
532 perror_with_name (objfile_name (objfile
));
534 /* Size the symbol table. */
535 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
536 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
538 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
539 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
541 free_pending_blocks ();
542 back_to
= make_cleanup (really_free_pendings
, 0);
544 minimal_symbol_reader
reader (objfile
);
546 /* Read stabs data from executable file and define symbols. */
548 read_dbx_symtab (reader
, objfile
);
550 /* Install any minimal symbols that have been collected as the current
551 minimal symbols for this objfile. */
555 do_cleanups (back_to
);
558 /* Initialize anything that needs initializing when a completely new
559 symbol file is specified (not just adding some symbols from another
560 file, e.g. a shared library). */
563 dbx_new_init (struct objfile
*ignore
)
565 stabsread_new_init ();
566 buildsym_new_init ();
567 init_header_files ();
571 /* dbx_symfile_init ()
572 is the dbx-specific initialization routine for reading symbols.
573 It is passed a struct objfile which contains, among other things,
574 the BFD for the file whose symbols are being read, and a slot for a pointer
575 to "private data" which we fill with goodies.
577 We read the string table into malloc'd space and stash a pointer to it.
579 Since BFD doesn't know how to read debug symbols in a format-independent
580 way (and may never do so...), we have to do it ourselves. We will never
581 be called unless this is an a.out (or very similar) file.
582 FIXME, there should be a cleaner peephole into the BFD environment here. */
584 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
587 dbx_symfile_init (struct objfile
*objfile
)
590 bfd
*sym_bfd
= objfile
->obfd
;
591 char *name
= bfd_get_filename (sym_bfd
);
593 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
594 struct dbx_symfile_info
*dbx
;
596 /* Allocate struct to keep track of the symfile. */
597 dbx
= XCNEW (struct dbx_symfile_info
);
598 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
600 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
601 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
602 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
604 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
605 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
606 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
608 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
610 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
612 error (_("Can't find .text section in symbol file"));
613 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
614 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
616 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
617 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
618 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
620 /* Read the string table and stash it away in the objfile_obstack.
621 When we blow away the objfile the string table goes away as well.
622 Note that gdb used to use the results of attempting to malloc the
623 string table, based on the size it read, as a form of sanity check
624 for botched byte swapping, on the theory that a byte swapped string
625 table size would be so totally bogus that the malloc would fail. Now
626 that we put in on the objfile_obstack, we can't do this since gdb gets
627 a fatal error (out of virtual memory) if the size is bogus. We can
628 however at least check to see if the size is less than the size of
629 the size field itself, or larger than the size of the entire file.
630 Note that all valid string tables have a size greater than zero, since
631 the bytes used to hold the size are included in the count. */
633 if (STRING_TABLE_OFFSET
== 0)
635 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
636 will never be zero, even when there is no string table. This
637 would appear to be a bug in bfd. */
638 DBX_STRINGTAB_SIZE (objfile
) = 0;
639 DBX_STRINGTAB (objfile
) = NULL
;
643 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
645 perror_with_name (name
);
647 memset (size_temp
, 0, sizeof (size_temp
));
648 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
651 perror_with_name (name
);
655 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
656 EOF if there is no string table, and attempting to read the size
657 from EOF will read zero bytes. */
658 DBX_STRINGTAB_SIZE (objfile
) = 0;
659 DBX_STRINGTAB (objfile
) = NULL
;
663 /* Read some data that would appear to be the string table size.
664 If there really is a string table, then it is probably the right
665 size. Byteswap if necessary and validate the size. Note that
666 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
667 random data that happened to be at STRING_TABLE_OFFSET, because
668 bfd can't tell us there is no string table, the sanity checks may
669 or may not catch this. */
670 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
672 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
673 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
674 error (_("ridiculous string table size (%d bytes)."),
675 DBX_STRINGTAB_SIZE (objfile
));
677 DBX_STRINGTAB (objfile
) =
678 (char *) obstack_alloc (&objfile
->objfile_obstack
,
679 DBX_STRINGTAB_SIZE (objfile
));
680 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
682 /* Now read in the string table in one big gulp. */
684 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
686 perror_with_name (name
);
687 val
= bfd_bread (DBX_STRINGTAB (objfile
),
688 DBX_STRINGTAB_SIZE (objfile
),
690 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
691 perror_with_name (name
);
696 /* Perform any local cleanups required when we are done with a particular
697 objfile. I.E, we are in the process of discarding all symbol information
698 for an objfile, freeing up all memory held for it, and unlinking the
699 objfile struct from the global list of known objfiles. */
702 dbx_symfile_finish (struct objfile
*objfile
)
704 free_header_files ();
708 dbx_free_symfile_info (struct objfile
*objfile
, void *arg
)
710 struct dbx_symfile_info
*dbx
= (struct dbx_symfile_info
*) arg
;
712 if (dbx
->header_files
!= NULL
)
714 int i
= dbx
->n_header_files
;
715 struct header_file
*hfiles
= dbx
->header_files
;
719 xfree (hfiles
[i
].name
);
720 xfree (hfiles
[i
].vector
);
730 /* Buffer for reading the symbol table entries. */
731 static struct external_nlist symbuf
[4096];
732 static int symbuf_idx
;
733 static int symbuf_end
;
735 /* Name of last function encountered. Used in Solaris to approximate
736 object file boundaries. */
737 static char *last_function_name
;
739 /* The address in memory of the string table of the object file we are
740 reading (which might not be the "main" object file, but might be a
741 shared library or some other dynamically loaded thing). This is
742 set by read_dbx_symtab when building psymtabs, and by
743 read_ofile_symtab when building symtabs, and is used only by
744 next_symbol_text. FIXME: If that is true, we don't need it when
745 building psymtabs, right? */
746 static char *stringtab_global
;
748 /* These variables are used to control fill_symbuf when the stabs
749 symbols are not contiguous (as may be the case when a COFF file is
750 linked using --split-by-reloc). */
751 static struct stab_section_list
*symbuf_sections
;
752 static unsigned int symbuf_left
;
753 static unsigned int symbuf_read
;
755 /* This variable stores a global stabs buffer, if we read stabs into
756 memory in one chunk in order to process relocations. */
757 static bfd_byte
*stabs_data
;
759 /* Refill the symbol table input buffer
760 and set the variables that control fetching entries from it.
761 Reports an error if no data available.
762 This function can read past the end of the symbol table
763 (into the string table) but this does no harm. */
766 fill_symbuf (bfd
*sym_bfd
)
773 nbytes
= sizeof (symbuf
);
774 if (nbytes
> symbuf_left
)
775 nbytes
= symbuf_left
;
776 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
778 else if (symbuf_sections
== NULL
)
780 count
= sizeof (symbuf
);
781 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
785 if (symbuf_left
<= 0)
787 file_ptr filepos
= symbuf_sections
->section
->filepos
;
789 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
790 perror_with_name (bfd_get_filename (sym_bfd
));
791 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
792 symbol_table_offset
= filepos
- symbuf_read
;
793 symbuf_sections
= symbuf_sections
->next
;
797 if (count
> sizeof (symbuf
))
798 count
= sizeof (symbuf
);
799 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
803 perror_with_name (bfd_get_filename (sym_bfd
));
804 else if (nbytes
== 0)
805 error (_("Premature end of file reading symbol table"));
806 symbuf_end
= nbytes
/ symbol_size
;
808 symbuf_left
-= nbytes
;
809 symbuf_read
+= nbytes
;
813 stabs_seek (int sym_offset
)
817 symbuf_read
+= sym_offset
;
818 symbuf_left
-= sym_offset
;
821 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
824 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
826 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
827 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
828 (intern).n_other = 0; \
829 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
830 if (bfd_get_sign_extend_vma (abfd)) \
831 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
833 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
836 /* Invariant: The symbol pointed to by symbuf_idx is the first one
837 that hasn't been swapped. Swap the symbol at the same time
838 that symbuf_idx is incremented. */
840 /* dbx allows the text of a symbol name to be continued into the
841 next symbol name! When such a continuation is encountered
842 (a \ at the end of the text of a name)
843 call this function to get the continuation. */
846 dbx_next_symbol_text (struct objfile
*objfile
)
848 struct internal_nlist nlist
;
850 if (symbuf_idx
== symbuf_end
)
851 fill_symbuf (symfile_bfd
);
854 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
855 OBJSTAT (objfile
, n_stabs
++);
859 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
862 /* Initialize the list of bincls to contain none and have some
866 init_bincl_list (int number
, struct objfile
*objfile
)
868 bincls_allocated
= number
;
869 next_bincl
= bincl_list
= XNEWVEC (struct header_file_location
,
873 /* Add a bincl to the list. */
876 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
878 if (next_bincl
>= bincl_list
+ bincls_allocated
)
880 int offset
= next_bincl
- bincl_list
;
882 bincls_allocated
*= 2;
883 bincl_list
= (struct header_file_location
*)
884 xrealloc ((char *) bincl_list
,
885 bincls_allocated
* sizeof (struct header_file_location
));
886 next_bincl
= bincl_list
+ offset
;
888 next_bincl
->pst
= pst
;
889 next_bincl
->instance
= instance
;
890 next_bincl
++->name
= name
;
893 /* Given a name, value pair, find the corresponding
894 bincl in the list. Return the partial symtab associated
895 with that header_file_location. */
897 static struct partial_symtab
*
898 find_corresponding_bincl_psymtab (char *name
, int instance
)
900 struct header_file_location
*bincl
;
902 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
903 if (bincl
->instance
== instance
904 && strcmp (name
, bincl
->name
) == 0)
907 repeated_header_complaint (name
, symnum
);
908 return (struct partial_symtab
*) 0;
911 /* Free the storage allocated for the bincl list. */
914 free_bincl_list (struct objfile
*objfile
)
917 bincls_allocated
= 0;
921 do_free_bincl_list_cleanup (void *objfile
)
923 free_bincl_list ((struct objfile
*) objfile
);
926 static struct cleanup
*
927 make_cleanup_free_bincl_list (struct objfile
*objfile
)
929 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
932 /* Set namestring based on nlist. If the string table index is invalid,
933 give a fake name, and print a single error message per symbol file read,
934 rather than abort the symbol reading or flood the user with messages. */
937 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
941 if (nlist
->n_strx
+ file_string_table_offset
942 >= DBX_STRINGTAB_SIZE (objfile
)
943 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
945 complaint (&symfile_complaints
,
946 _("bad string table offset in symbol %d"),
948 namestring
= "<bad string table offset>";
951 namestring
= (nlist
->n_strx
+ file_string_table_offset
952 + DBX_STRINGTAB (objfile
));
957 find_stab_function_addr (char *namestring
, const char *filename
,
958 struct objfile
*objfile
)
960 struct bound_minimal_symbol msym
;
964 p
= strchr (namestring
, ':');
968 p
= (char *) alloca (n
+ 2);
969 strncpy (p
, namestring
, n
);
972 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
973 if (msym
.minsym
== NULL
)
975 /* Sun Fortran appends an underscore to the minimal symbol name,
976 try again with an appended underscore if the minimal symbol
980 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
983 if (msym
.minsym
== NULL
&& filename
!= NULL
)
985 /* Try again without the filename. */
987 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
989 if (msym
.minsym
== NULL
&& filename
!= NULL
)
991 /* And try again for Sun Fortran, but without the filename. */
994 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
997 return msym
.minsym
== NULL
? 0 : BMSYMBOL_VALUE_ADDRESS (msym
);
1001 function_outside_compilation_unit_complaint (const char *arg1
)
1003 complaint (&symfile_complaints
,
1004 _("function `%s' appears to be defined "
1005 "outside of all compilation units"),
1009 /* Setup partial_symtab's describing each source file for which
1010 debugging information is available. */
1013 read_dbx_symtab (minimal_symbol_reader
&reader
, struct objfile
*objfile
)
1015 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1016 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
1017 struct internal_nlist nlist
;
1018 CORE_ADDR text_addr
;
1025 int past_first_source_file
= 0;
1026 CORE_ADDR last_function_start
= 0;
1027 struct cleanup
*back_to
;
1029 int textlow_not_set
;
1030 int data_sect_index
;
1032 /* Current partial symtab. */
1033 struct partial_symtab
*pst
;
1035 /* List of current psymtab's include files. */
1036 const char **psymtab_include_list
;
1037 int includes_allocated
;
1040 /* Index within current psymtab dependency list. */
1041 struct partial_symtab
**dependency_list
;
1042 int dependencies_used
, dependencies_allocated
;
1044 text_addr
= DBX_TEXT_ADDR (objfile
);
1045 text_size
= DBX_TEXT_SIZE (objfile
);
1047 /* FIXME. We probably want to change stringtab_global rather than add this
1048 while processing every symbol entry. FIXME. */
1049 file_string_table_offset
= 0;
1050 next_file_string_table_offset
= 0;
1052 stringtab_global
= DBX_STRINGTAB (objfile
);
1054 pst
= (struct partial_symtab
*) 0;
1056 includes_allocated
= 30;
1058 psymtab_include_list
= (const char **) alloca (includes_allocated
*
1059 sizeof (const char *));
1061 dependencies_allocated
= 30;
1062 dependencies_used
= 0;
1064 (struct partial_symtab
**) alloca (dependencies_allocated
*
1065 sizeof (struct partial_symtab
*));
1067 /* Init bincl list */
1068 init_bincl_list (20, objfile
);
1069 back_to
= make_cleanup_free_bincl_list (objfile
);
1071 set_last_source_file (NULL
);
1073 lowest_text_address
= (CORE_ADDR
) -1;
1075 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1076 abfd
= objfile
->obfd
;
1077 symbuf_end
= symbuf_idx
= 0;
1078 next_symbol_text_func
= dbx_next_symbol_text
;
1079 textlow_not_set
= 1;
1080 has_line_numbers
= 0;
1082 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1083 to global and static variables. The stab for a global or static
1084 variable doesn't give us any indication of which section it's in,
1085 so we can't tell immediately which offset in
1086 objfile->section_offsets we should apply to the variable's
1089 We could certainly find out which section contains the variable
1090 by looking up the variable's unrelocated address with
1091 find_pc_section, but that would be expensive; this is the
1092 function that constructs the partial symbol tables by examining
1093 every symbol in the entire executable, and it's
1094 performance-critical. So that expense would not be welcome. I'm
1095 not sure what to do about this at the moment.
1097 What we have done for years is to simply assume that the .data
1098 section's offset is appropriate for all global and static
1099 variables. Recently, this was expanded to fall back to the .bss
1100 section's offset if there is no .data section, and then to the
1101 .rodata section's offset. */
1102 data_sect_index
= objfile
->sect_index_data
;
1103 if (data_sect_index
== -1)
1104 data_sect_index
= SECT_OFF_BSS (objfile
);
1105 if (data_sect_index
== -1)
1106 data_sect_index
= SECT_OFF_RODATA (objfile
);
1108 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1109 for the file to have no .data, no .bss, and no .text at all, if
1110 it also has no global or static variables. If it does, we will
1111 get an internal error from an ANOFFSET macro below when we try to
1112 use data_sect_index. */
1114 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1116 /* Get the symbol for this run and pull out some info. */
1117 QUIT
; /* Allow this to be interruptable. */
1118 if (symbuf_idx
== symbuf_end
)
1120 bufp
= &symbuf
[symbuf_idx
++];
1123 * Special case to speed up readin.
1125 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1127 has_line_numbers
= 1;
1131 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1132 OBJSTAT (objfile
, n_stabs
++);
1134 /* Ok. There is a lot of code duplicated in the rest of this
1135 switch statement (for efficiency reasons). Since I don't
1136 like duplicating code, I will do my penance here, and
1137 describe the code which is duplicated:
1139 *) The assignment to namestring.
1140 *) The call to strchr.
1141 *) The addition of a partial symbol the two partial
1142 symbol lists. This last is a large section of code, so
1143 I've imbedded it in the following macro. */
1145 switch (nlist
.n_type
)
1148 * Standard, external, non-debugger, symbols
1151 case N_TEXT
| N_EXT
:
1152 case N_NBTEXT
| N_EXT
:
1155 case N_DATA
| N_EXT
:
1156 case N_NBDATA
| N_EXT
:
1161 case N_NBBSS
| N_EXT
:
1162 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1167 namestring
= set_namestring (objfile
, &nlist
);
1169 record_minimal_symbol (reader
, namestring
, nlist
.n_value
,
1170 nlist
.n_type
, objfile
); /* Always */
1173 /* Standard, local, non-debugger, symbols. */
1177 /* We need to be able to deal with both N_FN or N_TEXT,
1178 because we have no way of knowing whether the sys-supplied ld
1179 or GNU ld was used to make the executable. Sequents throw
1180 in another wrinkle -- they renumbered N_FN. */
1185 namestring
= set_namestring (objfile
, &nlist
);
1187 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1188 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1189 && namestring
[nsl
- 2] == '.'))
1191 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1192 SECT_OFF_TEXT (objfile
));
1194 if (past_first_source_file
&& pst
1195 /* The gould NP1 uses low values for .o and -l symbols
1196 which are not the address. */
1197 && nlist
.n_value
>= pst
->textlow
)
1199 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
,
1200 includes_used
, symnum
* symbol_size
,
1201 nlist
.n_value
> pst
->texthigh
1202 ? nlist
.n_value
: pst
->texthigh
,
1203 dependency_list
, dependencies_used
,
1205 pst
= (struct partial_symtab
*) 0;
1207 dependencies_used
= 0;
1208 has_line_numbers
= 0;
1211 past_first_source_file
= 1;
1220 case N_UNDF
| N_EXT
:
1221 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1222 We used to rely on the target to tell us whether it knows
1223 where the symbol has been relocated to, but none of the
1224 target implementations actually provided that operation.
1225 So we just ignore the symbol, the same way we would do if
1226 we had a target-side symbol lookup which returned no match.
1228 All other symbols (with nlist.n_value == 0), are really
1229 undefined, and so we ignore them too. */
1233 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1235 /* Deal with relative offsets in the string table
1236 used in ELF+STAB under Solaris. If we want to use the
1237 n_strx field, which contains the name of the file,
1238 we must adjust file_string_table_offset *before* calling
1239 set_namestring(). */
1240 past_first_source_file
= 1;
1241 file_string_table_offset
= next_file_string_table_offset
;
1242 next_file_string_table_offset
=
1243 file_string_table_offset
+ nlist
.n_value
;
1244 if (next_file_string_table_offset
< file_string_table_offset
)
1245 error (_("string table offset backs up at %d"), symnum
);
1246 /* FIXME -- replace error() with complaint. */
1251 /* Lots of symbol types we can just ignore. */
1258 /* Keep going . . . */
1261 * Special symbol types for GNU
1264 case N_INDR
| N_EXT
:
1266 case N_SETA
| N_EXT
:
1268 case N_SETT
| N_EXT
:
1270 case N_SETD
| N_EXT
:
1272 case N_SETB
| N_EXT
:
1283 static int prev_so_symnum
= -10;
1284 static int first_so_symnum
;
1286 static char *dirname_nso
;
1287 int prev_textlow_not_set
;
1289 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1290 SECT_OFF_TEXT (objfile
));
1292 prev_textlow_not_set
= textlow_not_set
;
1294 /* A zero value is probably an indication for the SunPRO 3.0
1295 compiler. dbx_end_psymtab explicitly tests for zero, so
1296 don't relocate it. */
1298 if (nlist
.n_value
== 0
1299 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1301 textlow_not_set
= 1;
1305 textlow_not_set
= 0;
1307 past_first_source_file
= 1;
1309 if (prev_so_symnum
!= symnum
- 1)
1310 { /* Here if prev stab wasn't N_SO. */
1311 first_so_symnum
= symnum
;
1315 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
,
1316 includes_used
, symnum
* symbol_size
,
1317 valu
> pst
->texthigh
1318 ? valu
: pst
->texthigh
,
1319 dependency_list
, dependencies_used
,
1320 prev_textlow_not_set
);
1321 pst
= (struct partial_symtab
*) 0;
1323 dependencies_used
= 0;
1324 has_line_numbers
= 0;
1328 prev_so_symnum
= symnum
;
1330 /* End the current partial symtab and start a new one. */
1332 namestring
= set_namestring (objfile
, &nlist
);
1334 /* Null name means end of .o file. Don't start a new one. */
1335 if (*namestring
== '\000')
1338 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1339 The first one is a directory name; the second the file name.
1340 If pst exists, is empty, and has a filename ending in '/',
1341 we assume the previous N_SO was a directory name. */
1343 p
= lbasename (namestring
);
1344 if (p
!= namestring
&& *p
== '\000')
1346 /* Save the directory name SOs locally, then save it into
1347 the psymtab when it's created below. */
1348 dirname_nso
= namestring
;
1352 /* Some other compilers (C++ ones in particular) emit useless
1353 SOs for non-existant .c files. We ignore all subsequent SOs
1354 that immediately follow the first. */
1358 pst
= start_psymtab (objfile
,
1360 first_so_symnum
* symbol_size
,
1361 objfile
->global_psymbols
.next
,
1362 objfile
->static_psymbols
.next
);
1363 pst
->dirname
= dirname_nso
;
1371 enum language tmp_language
;
1373 /* Add this bincl to the bincl_list for future EXCLs. No
1374 need to save the string; it'll be around until
1375 read_dbx_symtab function returns. */
1377 namestring
= set_namestring (objfile
, &nlist
);
1378 tmp_language
= deduce_language_from_filename (namestring
);
1380 /* Only change the psymtab's language if we've learned
1381 something useful (eg. tmp_language is not language_unknown).
1382 In addition, to match what start_subfile does, never change
1384 if (tmp_language
!= language_unknown
1385 && (tmp_language
!= language_c
1386 || psymtab_language
!= language_cplus
))
1387 psymtab_language
= tmp_language
;
1391 /* FIXME: we should not get here without a PST to work on.
1392 Attempt to recover. */
1393 complaint (&symfile_complaints
,
1394 _("N_BINCL %s not in entries for "
1395 "any file, at symtab pos %d"),
1396 namestring
, symnum
);
1399 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1401 /* Mark down an include file in the current psymtab. */
1403 goto record_include_file
;
1408 enum language tmp_language
;
1410 /* Mark down an include file in the current psymtab. */
1411 namestring
= set_namestring (objfile
, &nlist
);
1412 tmp_language
= deduce_language_from_filename (namestring
);
1414 /* Only change the psymtab's language if we've learned
1415 something useful (eg. tmp_language is not language_unknown).
1416 In addition, to match what start_subfile does, never change
1418 if (tmp_language
!= language_unknown
1419 && (tmp_language
!= language_c
1420 || psymtab_language
!= language_cplus
))
1421 psymtab_language
= tmp_language
;
1423 /* In C++, one may expect the same filename to come round many
1424 times, when code is coming alternately from the main file
1425 and from inline functions in other files. So I check to see
1426 if this is a file we've seen before -- either the main
1427 source file, or a previously included file.
1429 This seems to be a lot of time to be spending on N_SOL, but
1430 things like "break c-exp.y:435" need to work (I
1431 suppose the psymtab_include_list could be hashed or put
1432 in a binary tree, if profiling shows this is a major hog). */
1433 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
1438 for (i
= 0; i
< includes_used
; i
++)
1439 if (filename_cmp (namestring
, psymtab_include_list
[i
]) == 0)
1448 record_include_file
:
1450 psymtab_include_list
[includes_used
++] = namestring
;
1451 if (includes_used
>= includes_allocated
)
1453 const char **orig
= psymtab_include_list
;
1455 psymtab_include_list
= (const char **)
1456 alloca ((includes_allocated
*= 2) * sizeof (const char *));
1457 memcpy (psymtab_include_list
, orig
,
1458 includes_used
* sizeof (const char *));
1462 case N_LSYM
: /* Typedef or automatic variable. */
1463 case N_STSYM
: /* Data seg var -- static. */
1464 case N_LCSYM
: /* BSS " */
1465 case N_ROSYM
: /* Read-only data seg var -- static. */
1466 case N_NBSTS
: /* Gould nobase. */
1467 case N_NBLCS
: /* symbols. */
1469 case N_GSYM
: /* Global (extern) variable; can be
1470 data or bss (sigh FIXME). */
1472 /* Following may probably be ignored; I'll leave them here
1473 for now (until I do Pascal and Modula 2 extensions). */
1475 case N_PC
: /* I may or may not need this; I
1477 case N_M2C
: /* I suspect that I can ignore this here. */
1478 case N_SCOPE
: /* Same. */
1482 namestring
= set_namestring (objfile
, &nlist
);
1484 /* See if this is an end of function stab. */
1485 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1489 /* It's value is the size (in bytes) of the function for
1490 function relative stabs, or the address of the function's
1491 end for old style stabs. */
1492 valu
= nlist
.n_value
+ last_function_start
;
1493 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1494 pst
->texthigh
= valu
;
1498 p
= (char *) strchr (namestring
, ':');
1500 continue; /* Not a debugging symbol. */
1503 sym_name
= NULL
; /* pacify "gcc -Werror" */
1504 if (psymtab_language
== language_cplus
)
1506 std::string
name (namestring
, p
- namestring
);
1507 std::string new_name
= cp_canonicalize_string (name
.c_str ());
1508 if (!new_name
.empty ())
1510 sym_len
= new_name
.length ();
1511 sym_name
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
1519 sym_name
= namestring
;
1520 sym_len
= p
- namestring
;
1523 /* Main processing section for debugging symbols which
1524 the initial read through the symbol tables needs to worry
1525 about. If we reach this point, the symbol which we are
1526 considering is definitely one we are interested in.
1527 p must also contain the (valid) index into the namestring
1528 which indicates the debugging type symbol. */
1533 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1536 if (gdbarch_static_transform_name_p (gdbarch
))
1537 gdbarch_static_transform_name (gdbarch
, namestring
);
1539 add_psymbol_to_list (sym_name
, sym_len
, 1,
1540 VAR_DOMAIN
, LOC_STATIC
,
1541 &objfile
->static_psymbols
,
1542 nlist
.n_value
, psymtab_language
, objfile
);
1546 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1548 /* The addresses in these entries are reported to be
1549 wrong. See the code that reads 'G's for symtabs. */
1550 add_psymbol_to_list (sym_name
, sym_len
, 1,
1551 VAR_DOMAIN
, LOC_STATIC
,
1552 &objfile
->global_psymbols
,
1553 nlist
.n_value
, psymtab_language
, objfile
);
1557 /* When a 'T' entry is defining an anonymous enum, it
1558 may have a name which is the empty string, or a
1559 single space. Since they're not really defining a
1560 symbol, those shouldn't go in the partial symbol
1561 table. We do pick up the elements of such enums at
1562 'check_enum:', below. */
1563 if (p
>= namestring
+ 2
1564 || (p
== namestring
+ 1
1565 && namestring
[0] != ' '))
1567 add_psymbol_to_list (sym_name
, sym_len
, 1,
1568 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1569 &objfile
->static_psymbols
,
1570 0, psymtab_language
, objfile
);
1573 /* Also a typedef with the same name. */
1574 add_psymbol_to_list (sym_name
, sym_len
, 1,
1575 VAR_DOMAIN
, LOC_TYPEDEF
,
1576 &objfile
->static_psymbols
,
1577 0, psymtab_language
, objfile
);
1584 if (p
!= namestring
) /* a name is there, not just :T... */
1586 add_psymbol_to_list (sym_name
, sym_len
, 1,
1587 VAR_DOMAIN
, LOC_TYPEDEF
,
1588 &objfile
->static_psymbols
,
1589 0, psymtab_language
, objfile
);
1592 /* If this is an enumerated type, we need to
1593 add all the enum constants to the partial symbol
1594 table. This does not cover enums without names, e.g.
1595 "enum {a, b} c;" in C, but fortunately those are
1596 rare. There is no way for GDB to find those from the
1597 enum type without spending too much time on it. Thus
1598 to solve this problem, the compiler needs to put out the
1599 enum in a nameless type. GCC2 does this. */
1601 /* We are looking for something of the form
1602 <name> ":" ("t" | "T") [<number> "="] "e"
1603 {<constant> ":" <value> ","} ";". */
1605 /* Skip over the colon and the 't' or 'T'. */
1607 /* This type may be given a number. Also, numbers can come
1608 in pairs like (0,26). Skip over it. */
1609 while ((*p
>= '0' && *p
<= '9')
1610 || *p
== '(' || *p
== ',' || *p
== ')'
1616 /* The aix4 compiler emits extra crud before the members. */
1619 /* Skip over the type (?). */
1623 /* Skip over the colon. */
1627 /* We have found an enumerated type. */
1628 /* According to comments in read_enum_type
1629 a comma could end it instead of a semicolon.
1630 I don't know where that happens.
1632 while (*p
&& *p
!= ';' && *p
!= ',')
1636 /* Check for and handle cretinous dbx symbol name
1638 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1639 p
= next_symbol_text (objfile
);
1641 /* Point to the character after the name
1642 of the enum constant. */
1643 for (q
= p
; *q
&& *q
!= ':'; q
++)
1645 /* Note that the value doesn't matter for
1646 enum constants in psymtabs, just in symtabs. */
1647 add_psymbol_to_list (p
, q
- p
, 1,
1648 VAR_DOMAIN
, LOC_CONST
,
1649 &objfile
->static_psymbols
, 0,
1650 psymtab_language
, objfile
);
1651 /* Point past the name. */
1653 /* Skip over the value. */
1654 while (*p
&& *p
!= ',')
1656 /* Advance past the comma. */
1664 /* Constant, e.g. from "const" in Pascal. */
1665 add_psymbol_to_list (sym_name
, sym_len
, 1,
1666 VAR_DOMAIN
, LOC_CONST
,
1667 &objfile
->static_psymbols
, 0,
1668 psymtab_language
, objfile
);
1674 int name_len
= p
- namestring
;
1675 char *name
= (char *) xmalloc (name_len
+ 1);
1677 memcpy (name
, namestring
, name_len
);
1678 name
[name_len
] = '\0';
1679 function_outside_compilation_unit_complaint (name
);
1682 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1683 SECT_OFF_TEXT (objfile
));
1684 /* Kludges for ELF/STABS with Sun ACC. */
1685 last_function_name
= namestring
;
1686 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1687 value for the bottom of the text seg in those cases. */
1688 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1689 SECT_OFF_TEXT (objfile
))
1690 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1692 CORE_ADDR minsym_valu
=
1693 find_stab_function_addr (namestring
,
1694 pst
? pst
->filename
: NULL
,
1697 /* find_stab_function_addr will return 0 if the minimal
1698 symbol wasn't found. (Unfortunately, this might also
1699 be a valid address.) Anyway, if it *does* return 0,
1700 it is likely that the value was set correctly to begin
1702 if (minsym_valu
!= 0)
1703 nlist
.n_value
= minsym_valu
;
1705 if (pst
&& textlow_not_set
1706 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1708 pst
->textlow
= nlist
.n_value
;
1709 textlow_not_set
= 0;
1713 /* Keep track of the start of the last function so we
1714 can handle end of function symbols. */
1715 last_function_start
= nlist
.n_value
;
1717 /* In reordered executables this function may lie outside
1718 the bounds created by N_SO symbols. If that's the case
1719 use the address of this function as the low bound for
1720 the partial symbol table. */
1723 || (nlist
.n_value
< pst
->textlow
1725 != ANOFFSET (objfile
->section_offsets
,
1726 SECT_OFF_TEXT (objfile
))))))
1728 pst
->textlow
= nlist
.n_value
;
1729 textlow_not_set
= 0;
1731 add_psymbol_to_list (sym_name
, sym_len
, 1,
1732 VAR_DOMAIN
, LOC_BLOCK
,
1733 &objfile
->static_psymbols
,
1734 nlist
.n_value
, psymtab_language
, objfile
);
1737 /* Global functions were ignored here, but now they
1738 are put into the global psymtab like one would expect.
1739 They're also in the minimal symbol table. */
1743 int name_len
= p
- namestring
;
1744 char *name
= (char *) xmalloc (name_len
+ 1);
1746 memcpy (name
, namestring
, name_len
);
1747 name
[name_len
] = '\0';
1748 function_outside_compilation_unit_complaint (name
);
1751 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1752 SECT_OFF_TEXT (objfile
));
1753 /* Kludges for ELF/STABS with Sun ACC. */
1754 last_function_name
= namestring
;
1755 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1756 value for the bottom of the text seg in those cases. */
1757 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1758 SECT_OFF_TEXT (objfile
))
1759 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1761 CORE_ADDR minsym_valu
=
1762 find_stab_function_addr (namestring
,
1763 pst
? pst
->filename
: NULL
,
1766 /* find_stab_function_addr will return 0 if the minimal
1767 symbol wasn't found. (Unfortunately, this might also
1768 be a valid address.) Anyway, if it *does* return 0,
1769 it is likely that the value was set correctly to begin
1771 if (minsym_valu
!= 0)
1772 nlist
.n_value
= minsym_valu
;
1774 if (pst
&& textlow_not_set
1775 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1777 pst
->textlow
= nlist
.n_value
;
1778 textlow_not_set
= 0;
1782 /* Keep track of the start of the last function so we
1783 can handle end of function symbols. */
1784 last_function_start
= nlist
.n_value
;
1786 /* In reordered executables this function may lie outside
1787 the bounds created by N_SO symbols. If that's the case
1788 use the address of this function as the low bound for
1789 the partial symbol table. */
1792 || (nlist
.n_value
< pst
->textlow
1794 != ANOFFSET (objfile
->section_offsets
,
1795 SECT_OFF_TEXT (objfile
))))))
1797 pst
->textlow
= nlist
.n_value
;
1798 textlow_not_set
= 0;
1800 add_psymbol_to_list (sym_name
, sym_len
, 1,
1801 VAR_DOMAIN
, LOC_BLOCK
,
1802 &objfile
->global_psymbols
,
1803 nlist
.n_value
, psymtab_language
, objfile
);
1806 /* Two things show up here (hopefully); static symbols of
1807 local scope (static used inside braces) or extensions
1808 of structure symbols. We can ignore both. */
1822 case '#': /* For symbol identification (used in live ranges). */
1826 /* It is a C++ nested symbol. We don't need to record it
1827 (I don't think); if we try to look up foo::bar::baz,
1828 then symbols for the symtab containing foo should get
1829 read in, I think. */
1830 /* Someone says sun cc puts out symbols like
1831 /foo/baz/maclib::/usr/local/bin/maclib,
1832 which would get here with a symbol type of ':'. */
1836 /* Unexpected symbol descriptor. The second and subsequent stabs
1837 of a continued stab can show up here. The question is
1838 whether they ever can mimic a normal stab--it would be
1839 nice if not, since we certainly don't want to spend the
1840 time searching to the end of every string looking for
1843 complaint (&symfile_complaints
,
1844 _("unknown symbol descriptor `%c'"),
1847 /* Ignore it; perhaps it is an extension that we don't
1855 namestring
= set_namestring (objfile
, &nlist
);
1857 /* Find the corresponding bincl and mark that psymtab on the
1858 psymtab dependency list. */
1860 struct partial_symtab
*needed_pst
=
1861 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
1863 /* If this include file was defined earlier in this file,
1865 if (needed_pst
== pst
)
1873 for (i
= 0; i
< dependencies_used
; i
++)
1874 if (dependency_list
[i
] == needed_pst
)
1880 /* If it's already in the list, skip the rest. */
1884 dependency_list
[dependencies_used
++] = needed_pst
;
1885 if (dependencies_used
>= dependencies_allocated
)
1887 struct partial_symtab
**orig
= dependency_list
;
1890 (struct partial_symtab
**)
1891 alloca ((dependencies_allocated
*= 2)
1892 * sizeof (struct partial_symtab
*));
1893 memcpy (dependency_list
, orig
,
1895 * sizeof (struct partial_symtab
*)));
1897 fprintf_unfiltered (gdb_stderr
,
1898 "Had to reallocate "
1899 "dependency list.\n");
1900 fprintf_unfiltered (gdb_stderr
,
1901 "New dependencies allocated: %d\n",
1902 dependencies_allocated
);
1910 /* Solaris 2 end of module, finish current partial symbol table.
1911 dbx_end_psymtab will set pst->texthigh to the proper value, which
1912 is necessary if a module compiled without debugging info
1913 follows this module. */
1914 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
1916 dbx_end_psymtab (objfile
, pst
,
1917 psymtab_include_list
, includes_used
,
1918 symnum
* symbol_size
,
1919 (CORE_ADDR
) 0, dependency_list
,
1920 dependencies_used
, textlow_not_set
);
1921 pst
= (struct partial_symtab
*) 0;
1923 dependencies_used
= 0;
1924 has_line_numbers
= 0;
1930 HANDLE_RBRAC (nlist
.n_value
);
1936 case N_SSYM
: /* Claim: Structure or union element.
1937 Hopefully, I can ignore this. */
1938 case N_ENTRY
: /* Alternate entry point; can ignore. */
1939 case N_MAIN
: /* Can definitely ignore this. */
1940 case N_CATCH
: /* These are GNU C++ extensions */
1941 case N_EHDECL
: /* that can safely be ignored here. */
1953 case N_NSYMS
: /* Ultrix 4.0: symbol count */
1954 case N_DEFD
: /* GNU Modula-2 */
1955 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
1957 case N_OBJ
: /* Useless types from Solaris. */
1960 /* These symbols aren't interesting; don't worry about them. */
1964 /* If we haven't found it yet, ignore it. It's probably some
1965 new type we don't know about yet. */
1966 unknown_symtype_complaint (hex_string (nlist
.n_type
));
1971 /* If there's stuff to be cleaned up, clean it up. */
1974 /* Don't set pst->texthigh lower than it already is. */
1975 CORE_ADDR text_end
=
1976 (lowest_text_address
== (CORE_ADDR
) -1
1977 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
1978 SECT_OFF_TEXT (objfile
)))
1979 : lowest_text_address
)
1982 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
1983 symnum
* symbol_size
,
1984 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
1985 dependency_list
, dependencies_used
, textlow_not_set
);
1988 do_cleanups (back_to
);
1991 /* Allocate and partially fill a partial symtab. It will be
1992 completely filled at the end of the symbol list.
1994 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1995 is the address relative to which its symbols are (incremental) or 0
1998 static struct partial_symtab
*
1999 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2000 int ldsymoff
, struct partial_symbol
**global_syms
,
2001 struct partial_symbol
**static_syms
)
2003 struct partial_symtab
*result
=
2004 start_psymtab_common (objfile
, filename
, textlow
,
2005 global_syms
, static_syms
);
2007 result
->read_symtab_private
=
2008 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2009 LDSYMOFF (result
) = ldsymoff
;
2010 result
->read_symtab
= dbx_read_symtab
;
2011 SYMBOL_SIZE (result
) = symbol_size
;
2012 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2013 STRING_OFFSET (result
) = string_table_offset
;
2014 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2016 /* Deduce the source language from the filename for this psymtab. */
2017 psymtab_language
= deduce_language_from_filename (filename
);
2022 /* Close off the current usage of PST.
2023 Returns PST or NULL if the partial symtab was empty and thrown away.
2025 FIXME: List variables and peculiarities of same. */
2027 struct partial_symtab
*
2028 dbx_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2029 const char **include_list
, int num_includes
,
2030 int capping_symbol_offset
, CORE_ADDR capping_text
,
2031 struct partial_symtab
**dependency_list
,
2032 int number_dependencies
,
2033 int textlow_not_set
)
2036 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2038 if (capping_symbol_offset
!= -1)
2039 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2040 pst
->texthigh
= capping_text
;
2042 /* Under Solaris, the N_SO symbols always have a value of 0,
2043 instead of the usual address of the .o file. Therefore,
2044 we have to do some tricks to fill in texthigh and textlow.
2045 The first trick is: if we see a static
2046 or global function, and the textlow for the current pst
2047 is not set (ie: textlow_not_set), then we use that function's
2048 address for the textlow of the pst. */
2050 /* Now, to fill in texthigh, we remember the last function seen
2051 in the .o file. Also, there's a hack in
2052 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2053 to here via the misc_info field. Therefore, we can fill in
2054 a reliable texthigh by taking the address plus size of the
2055 last function in the file. */
2057 if (pst
->texthigh
== 0 && last_function_name
2058 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2062 struct bound_minimal_symbol minsym
;
2064 p
= strchr (last_function_name
, ':');
2066 p
= last_function_name
;
2067 n
= p
- last_function_name
;
2068 p
= (char *) alloca (n
+ 2);
2069 strncpy (p
, last_function_name
, n
);
2072 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2073 if (minsym
.minsym
== NULL
)
2075 /* Sun Fortran appends an underscore to the minimal symbol name,
2076 try again with an appended underscore if the minimal symbol
2080 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2084 pst
->texthigh
= (BMSYMBOL_VALUE_ADDRESS (minsym
)
2085 + MSYMBOL_SIZE (minsym
.minsym
));
2087 last_function_name
= NULL
;
2090 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2092 /* This test will be true if the last .o file is only data. */
2093 else if (textlow_not_set
)
2094 pst
->textlow
= pst
->texthigh
;
2097 struct partial_symtab
*p1
;
2099 /* If we know our own starting text address, then walk through all other
2100 psymtabs for this objfile, and if any didn't know their ending text
2101 address, set it to our starting address. Take care to not set our
2102 own ending address to our starting address, nor to set addresses on
2103 `dependency' files that have both textlow and texthigh zero. */
2105 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2107 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2109 p1
->texthigh
= pst
->textlow
;
2110 /* If this file has only data, then make textlow match
2112 if (p1
->textlow
== 0)
2113 p1
->textlow
= p1
->texthigh
;
2118 /* End of kludge for patching Solaris textlow and texthigh. */
2120 end_psymtab_common (objfile
, pst
);
2122 pst
->number_of_dependencies
= number_dependencies
;
2123 if (number_dependencies
)
2125 pst
->dependencies
= XOBNEWVEC (&objfile
->objfile_obstack
,
2126 struct partial_symtab
*,
2127 number_dependencies
);
2128 memcpy (pst
->dependencies
, dependency_list
,
2129 number_dependencies
* sizeof (struct partial_symtab
*));
2132 pst
->dependencies
= 0;
2134 for (i
= 0; i
< num_includes
; i
++)
2136 struct partial_symtab
*subpst
=
2137 allocate_psymtab (include_list
[i
], objfile
);
2139 subpst
->read_symtab_private
=
2140 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2144 subpst
->texthigh
= 0;
2146 /* We could save slight bits of space by only making one of these,
2147 shared by the entire set of include files. FIXME-someday. */
2148 subpst
->dependencies
=
2149 XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
2150 subpst
->dependencies
[0] = pst
;
2151 subpst
->number_of_dependencies
= 1;
2153 subpst
->globals_offset
=
2154 subpst
->n_global_syms
=
2155 subpst
->statics_offset
=
2156 subpst
->n_static_syms
= 0;
2159 subpst
->compunit_symtab
= 0;
2160 subpst
->read_symtab
= pst
->read_symtab
;
2163 if (num_includes
== 0
2164 && number_dependencies
== 0
2165 && pst
->n_global_syms
== 0
2166 && pst
->n_static_syms
== 0
2167 && has_line_numbers
== 0)
2169 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2170 it is on the obstack, but we can forget to chain it on the list. */
2171 /* Empty psymtabs happen as a result of header files which don't have
2172 any symbols in them. There can be a lot of them. But this check
2173 is wrong, in that a psymtab with N_SLINE entries but nothing else
2174 is not empty, but we don't realize that. Fixing that without slowing
2175 things down might be tricky. */
2177 discard_psymtab (objfile
, pst
);
2179 /* Indicate that psymtab was thrown away. */
2186 dbx_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
2188 struct cleanup
*old_chain
;
2193 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2194 "Shouldn't happen.\n",
2199 /* Read in all partial symtabs on which this one is dependent. */
2200 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2201 if (!pst
->dependencies
[i
]->readin
)
2203 /* Inform about additional files that need to be read in. */
2206 fputs_filtered (" ", gdb_stdout
);
2208 fputs_filtered ("and ", gdb_stdout
);
2210 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2211 wrap_here (""); /* Flush output. */
2212 gdb_flush (gdb_stdout
);
2214 dbx_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
2217 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2219 /* Init stuff necessary for reading in symbols */
2222 old_chain
= make_cleanup (really_free_pendings
, 0);
2223 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2224 symbol_size
= SYMBOL_SIZE (pst
);
2226 /* Read in this file's symbols. */
2227 bfd_seek (objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2228 read_ofile_symtab (objfile
, pst
);
2230 do_cleanups (old_chain
);
2236 /* Read in all of the symbols for a given psymtab for real.
2237 Be verbose about it if the user wants that. SELF is not NULL. */
2240 dbx_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
2244 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2245 "Shouldn't happen.\n",
2250 if (LDSYMLEN (self
) || self
->number_of_dependencies
)
2252 struct cleanup
*back_to
;
2254 /* Print the message now, before reading the string table,
2255 to avoid disconcerting pauses. */
2258 printf_filtered ("Reading in symbols for %s...", self
->filename
);
2259 gdb_flush (gdb_stdout
);
2262 next_symbol_text_func
= dbx_next_symbol_text
;
2264 back_to
= make_cleanup (null_cleanup
, NULL
);
2266 if (DBX_STAB_SECTION (objfile
))
2269 = symfile_relocate_debug_section (objfile
,
2270 DBX_STAB_SECTION (objfile
),
2274 make_cleanup (free_current_contents
, (void *) &stabs_data
);
2277 dbx_psymtab_to_symtab_1 (objfile
, self
);
2279 do_cleanups (back_to
);
2281 /* Match with global symbols. This only needs to be done once,
2282 after all of the symtabs and dependencies have been read in. */
2283 scan_file_globals (objfile
);
2285 /* Finish up the debug error message. */
2287 printf_filtered ("done.\n");
2291 /* Read in a defined section of a specific object file's symbols. */
2294 read_ofile_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
2297 struct external_nlist
*bufp
;
2298 struct internal_nlist nlist
;
2300 unsigned max_symnum
;
2302 int sym_offset
; /* Offset to start of symbols to read */
2303 int sym_size
; /* Size of symbols to read */
2304 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2305 int text_size
; /* Size of text segment for symbols */
2306 struct section_offsets
*section_offsets
;
2308 sym_offset
= LDSYMOFF (pst
);
2309 sym_size
= LDSYMLEN (pst
);
2310 text_offset
= pst
->textlow
;
2311 text_size
= pst
->texthigh
- pst
->textlow
;
2312 section_offsets
= objfile
->section_offsets
;
2314 dbxread_objfile
= objfile
;
2316 stringtab_global
= DBX_STRINGTAB (objfile
);
2317 set_last_source_file (NULL
);
2319 abfd
= objfile
->obfd
;
2320 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2321 symbuf_end
= symbuf_idx
= 0;
2323 symbuf_left
= sym_offset
+ sym_size
;
2325 /* It is necessary to actually read one symbol *before* the start
2326 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2327 occurs before the N_SO symbol.
2329 Detecting this in read_dbx_symtab
2330 would slow down initial readin, so we look for it here instead. */
2331 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2333 stabs_seek (sym_offset
- symbol_size
);
2335 bufp
= &symbuf
[symbuf_idx
++];
2336 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2337 OBJSTAT (objfile
, n_stabs
++);
2339 namestring
= set_namestring (objfile
, &nlist
);
2341 processing_gcc_compilation
= 0;
2342 if (nlist
.n_type
== N_TEXT
)
2344 const char *tempstring
= namestring
;
2346 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2347 processing_gcc_compilation
= 1;
2348 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2349 processing_gcc_compilation
= 2;
2350 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2352 if (startswith (tempstring
, "__gnu_compiled"))
2353 processing_gcc_compilation
= 2;
2358 /* The N_SO starting this symtab is the first symbol, so we
2359 better not check the symbol before it. I'm not this can
2360 happen, but it doesn't hurt to check for it. */
2361 stabs_seek (sym_offset
);
2362 processing_gcc_compilation
= 0;
2365 if (symbuf_idx
== symbuf_end
)
2367 bufp
= &symbuf
[symbuf_idx
];
2368 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2369 error (_("First symbol in segment of executable not a source symbol"));
2371 max_symnum
= sym_size
/ symbol_size
;
2374 symnum
< max_symnum
;
2377 QUIT
; /* Allow this to be interruptable. */
2378 if (symbuf_idx
== symbuf_end
)
2380 bufp
= &symbuf
[symbuf_idx
++];
2381 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2382 OBJSTAT (objfile
, n_stabs
++);
2384 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2386 namestring
= set_namestring (objfile
, &nlist
);
2390 if (sizeof (nlist
.n_value
) > 4
2391 /* We are a 64-bit debugger debugging a 32-bit program. */
2392 && (type
== N_LSYM
|| type
== N_PSYM
))
2393 /* We have to be careful with the n_value in the case of N_LSYM
2394 and N_PSYM entries, because they are signed offsets from frame
2395 pointer, but we actually read them as unsigned 32-bit values.
2396 This is not a problem for 32-bit debuggers, for which negative
2397 values end up being interpreted correctly (as negative
2398 offsets) due to integer overflow.
2399 But we need to sign-extend the value for 64-bit debuggers,
2400 or we'll end up interpreting negative values as very large
2401 positive offsets. */
2402 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2403 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2404 namestring
, section_offsets
, objfile
);
2406 /* We skip checking for a new .o or -l file; that should never
2407 happen in this routine. */
2408 else if (type
== N_TEXT
)
2410 /* I don't think this code will ever be executed, because
2411 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2412 the N_SO symbol which starts this source file.
2413 However, there is no reason not to accept
2414 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2416 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2417 processing_gcc_compilation
= 1;
2418 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2419 processing_gcc_compilation
= 2;
2421 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2422 || type
== (unsigned char) N_NBTEXT
)
2424 /* Global symbol: see if we came across a dbx defintion for
2425 a corresponding symbol. If so, store the value. Remove
2426 syms from the chain when their values are stored, but
2427 search the whole chain, as there may be several syms from
2428 different files with the same name. */
2429 /* This is probably not true. Since the files will be read
2430 in one at a time, each reference to a global symbol will
2431 be satisfied in each file as it appears. So we skip this
2437 /* In a Solaris elf file, this variable, which comes from the
2438 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2439 which comes from pst->textlow is correct. */
2440 if (last_source_start_addr
== 0)
2441 last_source_start_addr
= text_offset
;
2443 /* In reordered executables last_source_start_addr may not be the
2444 lower bound for this symtab, instead use text_offset which comes
2445 from pst->textlow which is correct. */
2446 if (last_source_start_addr
> text_offset
)
2447 last_source_start_addr
= text_offset
;
2449 pst
->compunit_symtab
= end_symtab (text_offset
+ text_size
,
2450 SECT_OFF_TEXT (objfile
));
2454 dbxread_objfile
= NULL
;
2458 /* Record the namespace that the function defined by SYMBOL was
2459 defined in, if necessary. BLOCK is the associated block; use
2460 OBSTACK for allocation. */
2463 cp_set_block_scope (const struct symbol
*symbol
,
2464 struct block
*block
,
2465 struct obstack
*obstack
)
2467 if (SYMBOL_DEMANGLED_NAME (symbol
) != NULL
)
2469 /* Try to figure out the appropriate namespace from the
2472 /* FIXME: carlton/2003-04-15: If the function in question is
2473 a method of a class, the name will actually include the
2474 name of the class as well. This should be harmless, but
2475 is a little unfortunate. */
2477 const char *name
= SYMBOL_DEMANGLED_NAME (symbol
);
2478 unsigned int prefix_len
= cp_entire_prefix_len (name
);
2480 block_set_scope (block
,
2481 (const char *) obstack_copy0 (obstack
, name
, prefix_len
),
2486 /* This handles a single symbol from the symbol-file, building symbols
2487 into a GDB symtab. It takes these arguments and an implicit argument.
2489 TYPE is the type field of the ".stab" symbol entry.
2490 DESC is the desc field of the ".stab" entry.
2491 VALU is the value field of the ".stab" entry.
2492 NAME is the symbol name, in our address space.
2493 SECTION_OFFSETS is a set of amounts by which the sections of this
2494 object file were relocated when it was loaded into memory. Note
2495 that these section_offsets are not the objfile->section_offsets but
2496 the pst->section_offsets. All symbols that refer to memory
2497 locations need to be offset by these amounts.
2498 OBJFILE is the object file from which we are reading symbols. It
2499 is used in end_symtab. */
2502 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2503 const struct section_offsets
*section_offsets
,
2504 struct objfile
*objfile
)
2506 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2507 struct context_stack
*newobj
;
2508 /* This remembers the address of the start of a function. It is
2509 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2510 are relative to the current function's start address. On systems
2511 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2512 and is used to relocate these symbol types rather than
2514 static CORE_ADDR function_start_offset
;
2516 /* This holds the address of the start of a function, without the
2517 system peculiarities of function_start_offset. */
2518 static CORE_ADDR last_function_start
;
2520 /* If this is nonzero, we've seen an N_SLINE since the start of the
2521 current function. We use this to tell us to move the first sline
2522 to the beginning of the function regardless of what its given
2524 static int sline_found_in_function
= 1;
2526 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2527 source file. Used to detect the SunPRO solaris compiler. */
2528 static int n_opt_found
;
2530 /* Something is wrong if we see real data before seeing a source
2533 if (get_last_source_file () == NULL
&& type
!= (unsigned char) N_SO
)
2535 /* Ignore any symbols which appear before an N_SO symbol.
2536 Currently no one puts symbols there, but we should deal
2537 gracefully with the case. A complain()t might be in order,
2538 but this should not be an error (). */
2547 if (*name
== '\000')
2549 /* This N_FUN marks the end of a function. This closes off
2550 the current block. */
2551 struct block
*block
;
2553 if (context_stack_depth
<= 0)
2555 lbrac_mismatch_complaint (symnum
);
2559 /* The following check is added before recording line 0 at
2560 end of function so as to handle hand-generated stabs
2561 which may have an N_FUN stabs at the end of the function,
2562 but no N_SLINE stabs. */
2563 if (sline_found_in_function
)
2565 CORE_ADDR addr
= last_function_start
+ valu
;
2567 record_line (current_subfile
, 0,
2568 gdbarch_addr_bits_remove (gdbarch
, addr
));
2571 within_function
= 0;
2572 newobj
= pop_context ();
2574 /* Make a block for the local symbols within. */
2575 block
= finish_block (newobj
->name
, &local_symbols
,
2576 newobj
->old_blocks
, NULL
,
2577 newobj
->start_addr
, newobj
->start_addr
+ valu
);
2579 /* For C++, set the block's scope. */
2580 if (SYMBOL_LANGUAGE (newobj
->name
) == language_cplus
)
2581 cp_set_block_scope (newobj
->name
, block
, &objfile
->objfile_obstack
);
2583 /* May be switching to an assembler file which may not be using
2584 block relative stabs, so reset the offset. */
2585 function_start_offset
= 0;
2590 sline_found_in_function
= 0;
2592 /* Relocate for dynamic loading. */
2593 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2594 valu
= gdbarch_addr_bits_remove (gdbarch
, valu
);
2595 last_function_start
= valu
;
2597 goto define_a_symbol
;
2600 /* This "symbol" just indicates the start of an inner lexical
2601 context within a function. */
2603 /* Ignore extra outermost context from SunPRO cc and acc. */
2604 if (n_opt_found
&& desc
== 1)
2607 valu
+= function_start_offset
;
2609 push_context (desc
, valu
);
2613 /* This "symbol" just indicates the end of an inner lexical
2614 context that was started with N_LBRAC. */
2616 /* Ignore extra outermost context from SunPRO cc and acc. */
2617 if (n_opt_found
&& desc
== 1)
2620 valu
+= function_start_offset
;
2622 if (context_stack_depth
<= 0)
2624 lbrac_mismatch_complaint (symnum
);
2628 newobj
= pop_context ();
2629 if (desc
!= newobj
->depth
)
2630 lbrac_mismatch_complaint (symnum
);
2632 if (local_symbols
!= NULL
)
2634 /* GCC development snapshots from March to December of
2635 2000 would output N_LSYM entries after N_LBRAC
2636 entries. As a consequence, these symbols are simply
2637 discarded. Complain if this is the case. */
2638 complaint (&symfile_complaints
,
2639 _("misplaced N_LBRAC entry; discarding local "
2640 "symbols which have no enclosing block"));
2642 local_symbols
= newobj
->locals
;
2644 if (context_stack_depth
> 1)
2646 /* This is not the outermost LBRAC...RBRAC pair in the
2647 function, its local symbols preceded it, and are the ones
2648 just recovered from the context stack. Define the block
2649 for them (but don't bother if the block contains no
2650 symbols. Should we complain on blocks without symbols?
2651 I can't think of any useful purpose for them). */
2652 if (local_symbols
!= NULL
)
2654 /* Muzzle a compiler bug that makes end < start.
2656 ??? Which compilers? Is this ever harmful?. */
2657 if (newobj
->start_addr
> valu
)
2659 complaint (&symfile_complaints
,
2660 _("block start larger than block end"));
2661 newobj
->start_addr
= valu
;
2663 /* Make a block for the local symbols within. */
2664 finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
2665 newobj
->start_addr
, valu
);
2670 /* This is the outermost LBRAC...RBRAC pair. There is no
2671 need to do anything; leave the symbols that preceded it
2672 to be attached to the function's own block. We need to
2673 indicate that we just moved outside of the function. */
2674 within_function
= 0;
2681 /* This kind of symbol indicates the start of an object file.
2682 Relocate for dynamic loading. */
2683 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2687 /* This type of symbol indicates the start of data for one
2688 source file. Finish the symbol table of the previous source
2689 file (if any) and start accumulating a new symbol table.
2690 Relocate for dynamic loading. */
2691 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2695 if (get_last_source_file ())
2697 /* Check if previous symbol was also an N_SO (with some
2698 sanity checks). If so, that one was actually the
2699 directory name, and the current one is the real file
2700 name. Patch things up. */
2701 if (previous_stab_code
== (unsigned char) N_SO
)
2703 patch_subfile_names (current_subfile
, name
);
2704 break; /* Ignore repeated SOs. */
2706 end_symtab (valu
, SECT_OFF_TEXT (objfile
));
2710 /* Null name means this just marks the end of text for this .o
2711 file. Don't start a new symtab in this case. */
2712 if (*name
== '\000')
2715 function_start_offset
= 0;
2718 start_symtab (objfile
, name
, NULL
, valu
);
2719 record_debugformat ("stabs");
2723 /* This type of symbol indicates the start of data for a
2724 sub-source-file, one whose contents were copied or included
2725 in the compilation of the main source file (whose name was
2726 given in the N_SO symbol). Relocate for dynamic loading. */
2727 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2728 start_subfile (name
);
2733 add_new_header_file (name
, valu
);
2734 start_subfile (name
);
2738 start_subfile (pop_subfile ());
2742 add_old_header_file (name
, valu
);
2746 /* This type of "symbol" really just records one line-number --
2747 core-address correspondence. Enter it in the line list for
2748 this symbol table. */
2750 /* Relocate for dynamic loading and for ELF acc
2751 function-relative symbols. */
2752 valu
+= function_start_offset
;
2754 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
2755 middle of the prologue instead of right at the start of the
2756 function. To deal with this we record the address for the
2757 first N_SLINE stab to be the start of the function instead of
2758 the listed location. We really shouldn't to this. When
2759 compiling with optimization, this first N_SLINE stab might be
2760 optimized away. Other (non-GCC) compilers don't emit this
2761 stab at all. There is no real harm in having an extra
2762 numbered line, although it can be a bit annoying for the
2763 user. However, it totally screws up our testsuite.
2765 So for now, keep adjusting the address of the first N_SLINE
2766 stab, but only for code compiled with GCC. */
2768 if (within_function
&& sline_found_in_function
== 0)
2770 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
2771 last_function_start
: valu
;
2773 record_line (current_subfile
, desc
,
2774 gdbarch_addr_bits_remove (gdbarch
, addr
));
2775 sline_found_in_function
= 1;
2778 record_line (current_subfile
, desc
,
2779 gdbarch_addr_bits_remove (gdbarch
, valu
));
2783 common_block_start (name
, objfile
);
2787 common_block_end (objfile
);
2790 /* The following symbol types need to have the appropriate
2791 offset added to their value; then we process symbol
2792 definitions in the name. */
2794 case N_STSYM
: /* Static symbol in data segment. */
2795 case N_LCSYM
: /* Static symbol in BSS segment. */
2796 case N_ROSYM
: /* Static symbol in read-only data segment. */
2797 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2798 Solaris 2's stabs-in-elf makes *most* symbols relative but
2799 leaves a few absolute (at least for Solaris 2.1 and version
2800 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
2801 the fence. .stab "foo:S...",N_STSYM is absolute (ld
2802 relocates it) .stab "foo:V...",N_STSYM is relative (section
2803 base subtracted). This leaves us no choice but to search for
2804 the 'S' or 'V'... (or pass the whole section_offsets stuff
2805 down ONE MORE function call level, which we really don't want
2810 /* Normal object file and NLMs have non-zero text seg offsets,
2811 but don't need their static syms offset in this fashion.
2812 XXX - This is really a crock that should be fixed in the
2813 solib handling code so that I don't have to work around it
2816 if (!symfile_relocatable
)
2818 p
= strchr (name
, ':');
2819 if (p
!= 0 && p
[1] == 'S')
2821 /* The linker relocated it. We don't want to add a
2822 Sun-stabs Tfoo.foo-like offset, but we *do*
2823 want to add whatever solib.c passed to
2824 symbol_file_add as addr (this is known to affect
2825 SunOS 4, and I suspect ELF too). Since there is no
2826 Ttext.text symbol, we can get addr from the text offset. */
2827 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2828 goto define_a_symbol
;
2831 /* Since it's not the kludge case, re-dispatch to the right
2842 internal_error (__FILE__
, __LINE__
,
2843 _("failed internal consistency check"));
2847 case_N_STSYM
: /* Static symbol in data segment. */
2848 case N_DSLINE
: /* Source line number, data segment. */
2849 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
2850 goto define_a_symbol
;
2852 case_N_LCSYM
: /* Static symbol in BSS segment. */
2853 case N_BSLINE
: /* Source line number, BSS segment. */
2854 /* N_BROWS: overlaps with N_BSLINE. */
2855 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
2856 goto define_a_symbol
;
2858 case_N_ROSYM
: /* Static symbol in read-only data segment. */
2859 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
2860 goto define_a_symbol
;
2862 case N_ENTRY
: /* Alternate entry point. */
2863 /* Relocate for dynamic loading. */
2864 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2865 goto define_a_symbol
;
2867 /* The following symbol types we don't know how to process.
2868 Handle them in a "default" way, but complain to people who
2871 case N_CATCH
: /* Exception handler catcher. */
2872 case N_EHDECL
: /* Exception handler name. */
2873 case N_PC
: /* Global symbol in Pascal. */
2874 case N_M2C
: /* Modula-2 compilation unit. */
2875 /* N_MOD2: overlaps with N_EHDECL. */
2876 case N_SCOPE
: /* Modula-2 scope information. */
2877 case N_ECOML
: /* End common (local name). */
2878 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
2883 unknown_symtype_complaint (hex_string (type
));
2886 /* The following symbol types don't need the address field
2887 relocated, since it is either unused, or is absolute. */
2889 case N_GSYM
: /* Global variable. */
2890 case N_NSYMS
: /* Number of symbols (Ultrix). */
2891 case N_NOMAP
: /* No map? (Ultrix). */
2892 case N_RSYM
: /* Register variable. */
2893 case N_DEFD
: /* Modula-2 GNU module dependency. */
2894 case N_SSYM
: /* Struct or union element. */
2895 case N_LSYM
: /* Local symbol in stack. */
2896 case N_PSYM
: /* Parameter variable. */
2897 case N_LENG
: /* Length of preceding symbol type. */
2901 char *colon_pos
= strchr (name
, ':');
2903 if (colon_pos
== NULL
)
2906 deftype
= colon_pos
[1];
2912 /* Deal with the SunPRO 3.0 compiler which omits the
2913 address from N_FUN symbols. */
2915 && valu
== ANOFFSET (section_offsets
,
2916 SECT_OFF_TEXT (objfile
))
2917 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2919 CORE_ADDR minsym_valu
=
2920 find_stab_function_addr (name
, get_last_source_file (),
2923 /* The function find_stab_function_addr will return
2924 0 if the minimal symbol wasn't found.
2925 (Unfortunately, this might also be a valid
2926 address.) Anyway, if it *does* return 0, it is
2927 likely that the value was set correctly to begin
2929 if (minsym_valu
!= 0)
2933 /* These addresses are absolute. */
2934 function_start_offset
= valu
;
2936 within_function
= 1;
2938 if (context_stack_depth
> 1)
2940 complaint (&symfile_complaints
,
2941 _("unmatched N_LBRAC before symtab pos %d"),
2946 if (context_stack_depth
> 0)
2948 struct block
*block
;
2950 newobj
= pop_context ();
2951 /* Make a block for the local symbols within. */
2952 block
= finish_block (newobj
->name
, &local_symbols
,
2953 newobj
->old_blocks
, NULL
,
2954 newobj
->start_addr
, valu
);
2956 /* For C++, set the block's scope. */
2957 if (SYMBOL_LANGUAGE (newobj
->name
) == language_cplus
)
2958 cp_set_block_scope (newobj
->name
, block
,
2959 &objfile
->objfile_obstack
);
2962 newobj
= push_context (0, valu
);
2963 newobj
->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
2967 define_symbol (valu
, name
, desc
, type
, objfile
);
2973 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2974 for a bunch of other flags, too. Someday we may parse their
2975 flags; for now we ignore theirs and hope they'll ignore ours. */
2976 case N_OPT
: /* Solaris 2: Compiler options. */
2979 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2981 processing_gcc_compilation
= 2;
2988 case N_MAIN
: /* Name of main routine. */
2989 /* FIXME: If one has a symbol file with N_MAIN and then replaces
2990 it with a symbol file with "main" and without N_MAIN. I'm
2991 not sure exactly what rule to follow but probably something
2992 like: N_MAIN takes precedence over "main" no matter what
2993 objfile it is in; If there is more than one N_MAIN, choose
2994 the one in the symfile_objfile; If there is more than one
2995 N_MAIN within a given objfile, complain() and choose
2996 arbitrarily. (kingdon) */
2998 set_objfile_main_name (objfile
, name
, language_unknown
);
3001 /* The following symbol types can be ignored. */
3002 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3003 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3004 /* N_UNDF: Solaris 2: File separator mark. */
3005 /* N_UNDF: -- we will never encounter it, since we only process
3006 one file's symbols at once. */
3007 case N_ENDM
: /* Solaris 2: End of module. */
3008 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3012 /* '#' is a GNU C extension to allow one symbol to refer to another
3015 Generally this is used so that an alias can refer to its main
3020 /* Initialize symbol reference names and determine if this is a
3021 definition. If a symbol reference is being defined, go ahead
3022 and add it. Otherwise, just return. */
3027 /* If this stab defines a new reference ID that is not on the
3028 reference list, then put it on the reference list.
3030 We go ahead and advance NAME past the reference, even though
3031 it is not strictly necessary at this time. */
3032 refnum
= symbol_reference_defined (&s
);
3034 if (!ref_search (refnum
))
3035 ref_add (refnum
, 0, name
, valu
);
3039 previous_stab_code
= type
;
3042 /* FIXME: The only difference between this and elfstab_build_psymtabs
3043 is the call to install_minimal_symbols for elf, and the support for
3044 split sections. If the differences are really that small, the code
3045 should be shared. */
3047 /* Scan and build partial symbols for an coff symbol file.
3048 The coff file has already been processed to get its minimal symbols.
3050 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3053 OBJFILE is the object file we are reading symbols from.
3054 ADDR is the address relative to which the symbols are (e.g.
3055 the base address of the text segment).
3056 TEXTADDR is the address of the text section.
3057 TEXTSIZE is the size of the text section.
3058 STABSECTS is the list of .stab sections in OBJFILE.
3059 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3060 .stabstr section exists.
3062 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3063 adjusted for coff details. */
3066 coffstab_build_psymtabs (struct objfile
*objfile
,
3067 CORE_ADDR textaddr
, unsigned int textsize
,
3068 struct stab_section_list
*stabsects
,
3069 file_ptr stabstroffset
, unsigned int stabstrsize
)
3072 bfd
*sym_bfd
= objfile
->obfd
;
3073 char *name
= bfd_get_filename (sym_bfd
);
3074 unsigned int stabsize
;
3076 DBX_TEXT_ADDR (objfile
) = textaddr
;
3077 DBX_TEXT_SIZE (objfile
) = textsize
;
3079 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3080 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3081 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3083 if (stabstrsize
> bfd_get_size (sym_bfd
))
3084 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3085 DBX_STRINGTAB (objfile
) = (char *)
3086 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3087 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3089 /* Now read in the string table in one big gulp. */
3091 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3093 perror_with_name (name
);
3094 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3095 if (val
!= stabstrsize
)
3096 perror_with_name (name
);
3098 stabsread_new_init ();
3099 buildsym_new_init ();
3100 free_header_files ();
3101 init_header_files ();
3103 processing_acc_compilation
= 1;
3105 /* In a coff file, we've already installed the minimal symbols that came
3106 from the coff (non-stab) symbol table, so always act like an
3107 incremental load here. */
3108 if (stabsects
->next
== NULL
)
3110 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3111 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3112 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3116 struct stab_section_list
*stabsect
;
3118 DBX_SYMCOUNT (objfile
) = 0;
3119 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3121 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3122 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3125 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3127 symbuf_sections
= stabsects
->next
;
3128 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3132 dbx_symfile_read (objfile
, 0);
3135 /* Scan and build partial symbols for an ELF symbol file.
3136 This ELF file has already been processed to get its minimal symbols.
3138 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3141 OBJFILE is the object file we are reading symbols from.
3142 ADDR is the address relative to which the symbols are (e.g.
3143 the base address of the text segment).
3144 STABSECT is the BFD section information for the .stab section.
3145 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3146 .stabstr section exists.
3148 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3149 adjusted for elf details. */
3152 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
3153 file_ptr stabstroffset
, unsigned int stabstrsize
)
3156 bfd
*sym_bfd
= objfile
->obfd
;
3157 char *name
= bfd_get_filename (sym_bfd
);
3158 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
3160 /* Find the first and last text address. dbx_symfile_read seems to
3162 find_text_range (sym_bfd
, objfile
);
3164 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3165 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3166 DBX_SYMCOUNT (objfile
)
3167 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3168 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3169 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3170 DBX_STAB_SECTION (objfile
) = stabsect
;
3172 if (stabstrsize
> bfd_get_size (sym_bfd
))
3173 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3174 DBX_STRINGTAB (objfile
) = (char *)
3175 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3176 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3178 /* Now read in the string table in one big gulp. */
3180 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3182 perror_with_name (name
);
3183 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3184 if (val
!= stabstrsize
)
3185 perror_with_name (name
);
3187 stabsread_new_init ();
3188 buildsym_new_init ();
3189 free_header_files ();
3190 init_header_files ();
3192 processing_acc_compilation
= 1;
3195 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3196 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3198 make_cleanup (free_current_contents
, (void *) &stabs_data
);
3200 /* In an elf file, we've already installed the minimal symbols that came
3201 from the elf (non-stab) symbol table, so always act like an
3202 incremental load here. dbx_symfile_read should not generate any new
3203 minimal symbols, since we will have already read the ELF dynamic symbol
3204 table and normal symbol entries won't be in the ".stab" section; but in
3205 case it does, it will install them itself. */
3206 dbx_symfile_read (objfile
, 0);
3208 do_cleanups (back_to
);
3211 /* Scan and build partial symbols for a file with special sections for stabs
3212 and stabstrings. The file has already been processed to get its minimal
3213 symbols, and any other symbols that might be necessary to resolve GSYMs.
3215 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3218 OBJFILE is the object file we are reading symbols from.
3219 ADDR is the address relative to which the symbols are (e.g. the base address
3220 of the text segment).
3221 STAB_NAME is the name of the section that contains the stabs.
3222 STABSTR_NAME is the name of the section that contains the stab strings.
3224 This routine is mostly copied from dbx_symfile_init and
3225 dbx_symfile_read. */
3228 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3229 char *stabstr_name
, char *text_name
)
3232 bfd
*sym_bfd
= objfile
->obfd
;
3233 char *name
= bfd_get_filename (sym_bfd
);
3235 asection
*stabstrsect
;
3236 asection
*text_sect
;
3237 struct dbx_symfile_info
*dbx
;
3239 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3240 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3246 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3247 "but not string section (%s)"),
3248 stab_name
, stabstr_name
);
3250 dbx
= XCNEW (struct dbx_symfile_info
);
3251 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
3253 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3255 error (_("Can't find %s section in symbol file"), text_name
);
3256 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3257 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3259 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3260 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3261 / DBX_SYMBOL_SIZE (objfile
);
3262 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3263 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING
3267 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3268 error (_("ridiculous string table size: %d bytes"),
3269 DBX_STRINGTAB_SIZE (objfile
));
3270 DBX_STRINGTAB (objfile
) = (char *)
3271 obstack_alloc (&objfile
->objfile_obstack
,
3272 DBX_STRINGTAB_SIZE (objfile
) + 1);
3273 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3275 /* Now read in the string table in one big gulp. */
3277 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3278 stabstrsect
, /* bfd section */
3279 DBX_STRINGTAB (objfile
), /* input buffer */
3280 0, /* offset into section */
3281 DBX_STRINGTAB_SIZE (objfile
)); /* amount to
3285 perror_with_name (name
);
3287 stabsread_new_init ();
3288 buildsym_new_init ();
3289 free_header_files ();
3290 init_header_files ();
3292 /* Now, do an incremental load. */
3294 processing_acc_compilation
= 1;
3295 dbx_symfile_read (objfile
, 0);
3298 static const struct sym_fns aout_sym_fns
=
3300 dbx_new_init
, /* init anything gbl to entire symtab */
3301 dbx_symfile_init
, /* read initial info, setup for sym_read() */
3302 dbx_symfile_read
, /* read a symbol file into symtab */
3303 NULL
, /* sym_read_psymbols */
3304 dbx_symfile_finish
, /* finished with file, cleanup */
3305 default_symfile_offsets
, /* parse user's offsets to internal form */
3306 default_symfile_segments
, /* Get segment information from a file. */
3308 default_symfile_relocate
, /* Relocate a debug section. */
3309 NULL
, /* sym_probe_fns */
3314 _initialize_dbxread (void)
3316 add_symtab_fns (bfd_target_aout_flavour
, &aout_sym_fns
);
3318 dbx_objfile_data_key
3319 = register_objfile_data_with_cleanup (NULL
, dbx_free_symfile_info
);