1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2014 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 */
36 #if defined(__CYGNUSCLIB__)
37 #include <sys/types.h>
41 #include "gdb_obstack.h"
44 #include "breakpoint.h"
46 #include "gdbcore.h" /* for bfd stuff */
47 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
48 #include "filenames.h"
51 #include "stabsread.h"
52 #include "gdb-stabs.h"
54 #include "complaints.h"
56 #include "cp-support.h"
60 #include "gdb_assert.h"
62 #include "aout/aout64.h"
63 #include "aout/stab_gnu.h" /* We always use GNU stabs, not
67 /* Key for dbx-associated data. */
69 const struct objfile_data
*dbx_objfile_data_key
;
71 /* We put a pointer to this structure in the read_symtab_private field
76 /* Offset within the file symbol table of first local symbol for this
81 /* Length (in bytes) of the section of the symbol table devoted to
82 this file's symbols (actually, the section bracketed may contain
83 more than just this file's symbols). If ldsymlen is 0, the only
84 reason for this thing's existence is the dependency list. Nothing
85 else will happen when it is read in. */
89 /* The size of each symbol in the symbol file (in external form). */
93 /* Further information needed to locate the symbols if they are in
98 int file_string_offset
;
101 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
102 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
103 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
104 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
105 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
106 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
107 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
110 /* The objfile we are currently reading. */
112 static struct objfile
*dbxread_objfile
;
114 /* Remember what we deduced to be the source language of this psymtab. */
116 static enum language psymtab_language
= language_unknown
;
118 /* The BFD for this file -- implicit parameter to next_symbol_text. */
120 static bfd
*symfile_bfd
;
122 /* The size of each symbol in the symbol file (in external form).
123 This is set by dbx_symfile_read when building psymtabs, and by
124 dbx_psymtab_to_symtab when building symtabs. */
126 static unsigned symbol_size
;
128 /* This is the offset of the symbol table in the executable file. */
130 static unsigned symbol_table_offset
;
132 /* This is the offset of the string table in the executable file. */
134 static unsigned string_table_offset
;
136 /* For elf+stab executables, the n_strx field is not a simple index
137 into the string table. Instead, each .o file has a base offset in
138 the string table, and the associated symbols contain offsets from
139 this base. The following two variables contain the base offset for
140 the current and next .o files. */
142 static unsigned int file_string_table_offset
;
143 static unsigned int next_file_string_table_offset
;
145 /* .o and NLM files contain unrelocated addresses which are based at
146 0. When non-zero, this flag disables some of the special cases for
147 Solaris elf+stab text addresses at location 0. */
149 static int symfile_relocatable
= 0;
151 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
152 relative to the function start address. */
154 static int block_address_function_relative
= 0;
156 /* The lowest text address we have yet encountered. This is needed
157 because in an a.out file, there is no header field which tells us
158 what address the program is actually going to be loaded at, so we
159 need to make guesses based on the symbols (which *are* relocated to
160 reflect the address it will be loaded at). */
162 static CORE_ADDR lowest_text_address
;
164 /* Non-zero if there is any line number info in the objfile. Prevents
165 end_psymtab from discarding an otherwise empty psymtab. */
167 static int has_line_numbers
;
169 /* Complaints about the symbols we have encountered. */
172 unknown_symtype_complaint (const char *arg1
)
174 complaint (&symfile_complaints
, _("unknown symbol type %s"), arg1
);
178 lbrac_mismatch_complaint (int arg1
)
180 complaint (&symfile_complaints
,
181 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1
);
185 repeated_header_complaint (const char *arg1
, int arg2
)
187 complaint (&symfile_complaints
,
188 _("\"repeated\" header file %s not "
189 "previously seen, at symtab pos %d"),
193 /* find_text_range --- find start and end of loadable code sections
195 The find_text_range function finds the shortest address range that
196 encloses all sections containing executable code, and stores it in
197 objfile's text_addr and text_size members.
199 dbx_symfile_read will use this to finish off the partial symbol
200 table, in some cases. */
203 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
210 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
211 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
213 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
214 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
218 if (sec_start
< start
)
233 error (_("Can't find any code sections in symbol file"));
235 DBX_TEXT_ADDR (objfile
) = start
;
236 DBX_TEXT_SIZE (objfile
) = end
- start
;
241 /* During initial symbol readin, we need to have a structure to keep
242 track of which psymtabs have which bincls in them. This structure
243 is used during readin to setup the list of dependencies within each
244 partial symbol table. */
246 struct header_file_location
248 char *name
; /* Name of header file */
249 int instance
; /* See above */
250 struct partial_symtab
*pst
; /* Partial symtab that has the
251 BINCL/EINCL defs for this file. */
254 /* The actual list and controling variables. */
255 static struct header_file_location
*bincl_list
, *next_bincl
;
256 static int bincls_allocated
;
258 /* Local function prototypes. */
260 extern void _initialize_dbxread (void);
262 static void read_ofile_symtab (struct objfile
*, struct partial_symtab
*);
264 static void dbx_read_symtab (struct partial_symtab
*self
,
265 struct objfile
*objfile
);
267 static void dbx_psymtab_to_symtab_1 (struct objfile
*, struct partial_symtab
*);
269 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
271 static void read_dbx_symtab (struct objfile
*);
273 static void free_bincl_list (struct objfile
*);
275 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
277 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
279 static void init_bincl_list (int, struct objfile
*);
281 static char *dbx_next_symbol_text (struct objfile
*);
283 static void fill_symbuf (bfd
*);
285 static void dbx_symfile_init (struct objfile
*);
287 static void dbx_new_init (struct objfile
*);
289 static void dbx_symfile_read (struct objfile
*, int);
291 static void dbx_symfile_finish (struct objfile
*);
293 static void record_minimal_symbol (const char *, CORE_ADDR
, int,
296 static void add_new_header_file (char *, int);
298 static void add_old_header_file (char *, int);
300 static void add_this_object_header_file (int);
302 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
304 struct partial_symbol
**,
305 struct partial_symbol
**);
307 /* Free up old header file tables. */
310 free_header_files (void)
312 if (this_object_header_files
)
314 xfree (this_object_header_files
);
315 this_object_header_files
= NULL
;
317 n_allocated_this_object_header_files
= 0;
320 /* Allocate new header file tables. */
323 init_header_files (void)
325 n_allocated_this_object_header_files
= 10;
326 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
329 /* Add header file number I for this object file
330 at the next successive FILENUM. */
333 add_this_object_header_file (int i
)
335 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
337 n_allocated_this_object_header_files
*= 2;
338 this_object_header_files
339 = (int *) xrealloc ((char *) this_object_header_files
,
340 n_allocated_this_object_header_files
* sizeof (int));
343 this_object_header_files
[n_this_object_header_files
++] = i
;
346 /* Add to this file an "old" header file, one already seen in
347 a previous object file. NAME is the header file's name.
348 INSTANCE is its instance code, to select among multiple
349 symbol tables for the same header file. */
352 add_old_header_file (char *name
, int instance
)
354 struct header_file
*p
= HEADER_FILES (dbxread_objfile
);
357 for (i
= 0; i
< N_HEADER_FILES (dbxread_objfile
); i
++)
358 if (filename_cmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
360 add_this_object_header_file (i
);
363 repeated_header_complaint (name
, symnum
);
366 /* Add to this file a "new" header file: definitions for its types follow.
367 NAME is the header file's name.
368 Most often this happens only once for each distinct header file,
369 but not necessarily. If it happens more than once, INSTANCE has
370 a different value each time, and references to the header file
371 use INSTANCE values to select among them.
373 dbx output contains "begin" and "end" markers for each new header file,
374 but at this level we just need to know which files there have been;
375 so we record the file when its "begin" is seen and ignore the "end". */
378 add_new_header_file (char *name
, int instance
)
381 struct header_file
*hfile
;
383 /* Make sure there is room for one more header file. */
385 i
= N_ALLOCATED_HEADER_FILES (dbxread_objfile
);
387 if (N_HEADER_FILES (dbxread_objfile
) == i
)
391 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = 10;
392 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
393 xmalloc (10 * sizeof (struct header_file
));
398 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = i
;
399 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
400 xrealloc ((char *) HEADER_FILES (dbxread_objfile
),
401 (i
* sizeof (struct header_file
)));
405 /* Create an entry for this header file. */
407 i
= N_HEADER_FILES (dbxread_objfile
)++;
408 hfile
= HEADER_FILES (dbxread_objfile
) + i
;
409 hfile
->name
= xstrdup (name
);
410 hfile
->instance
= instance
;
413 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
414 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
416 add_this_object_header_file (i
);
420 static struct type
**
421 explicit_lookup_type (int real_filenum
, int index
)
423 struct header_file
*f
= &HEADER_FILES (dbxread_objfile
)[real_filenum
];
425 if (index
>= f
->length
)
428 f
->vector
= (struct type
**)
429 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
430 memset (&f
->vector
[f
->length
/ 2],
431 '\0', f
->length
* sizeof (struct type
*) / 2);
433 return &f
->vector
[index
];
438 record_minimal_symbol (const char *name
, CORE_ADDR address
, int type
,
439 struct objfile
*objfile
)
441 enum minimal_symbol_type ms_type
;
448 section
= SECT_OFF_TEXT (objfile
);
452 section
= SECT_OFF_DATA (objfile
);
456 section
= SECT_OFF_BSS (objfile
);
465 section
= SECT_OFF_DATA (objfile
);
468 /* I don't think this type actually exists; since a N_SETV is the result
469 of going over many .o files, it doesn't make sense to have one
471 ms_type
= mst_file_data
;
472 section
= SECT_OFF_DATA (objfile
);
479 ms_type
= mst_file_text
;
480 section
= SECT_OFF_TEXT (objfile
);
483 ms_type
= mst_file_data
;
485 /* Check for __DYNAMIC, which is used by Sun shared libraries.
486 Record it as global even if it's local, not global, so
487 lookup_minimal_symbol can find it. We don't check symbol_leading_char
488 because for SunOS4 it always is '_'. */
489 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
492 /* Same with virtual function tables, both global and static. */
494 const char *tempstring
= name
;
496 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
498 if (is_vtable_name (tempstring
))
501 section
= SECT_OFF_DATA (objfile
);
504 ms_type
= mst_file_bss
;
505 section
= SECT_OFF_BSS (objfile
);
508 ms_type
= mst_unknown
;
513 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
514 && address
< lowest_text_address
)
515 lowest_text_address
= address
;
517 prim_record_minimal_symbol_and_info
518 (name
, address
, ms_type
, section
, objfile
);
521 /* Scan and build partial symbols for a symbol file.
522 We have been initialized by a call to dbx_symfile_init, which
523 put all the relevant info into a "struct dbx_symfile_info",
524 hung off the objfile structure. */
527 dbx_symfile_read (struct objfile
*objfile
, int symfile_flags
)
531 struct cleanup
*back_to
;
533 sym_bfd
= objfile
->obfd
;
535 /* .o and .nlm files are relocatables with text, data and bss segs based at
536 0. This flag disables special (Solaris stabs-in-elf only) fixups for
537 symbols with a value of 0. */
539 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
541 /* This is true for Solaris (and all other systems which put stabs
542 in sections, hopefully, since it would be silly to do things
543 differently from Solaris), and false for SunOS4 and other a.out
545 block_address_function_relative
=
546 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
547 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
548 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
549 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
550 || (0 == strncmp (bfd_get_target (sym_bfd
), "epoc-pe", 7))
551 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
553 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
555 perror_with_name (objfile_name (objfile
));
557 /* Size the symbol table. */
558 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
559 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
561 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
562 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
564 free_pending_blocks ();
565 back_to
= make_cleanup (really_free_pendings
, 0);
567 init_minimal_symbol_collection ();
568 make_cleanup_discard_minimal_symbols ();
570 /* Read stabs data from executable file and define symbols. */
572 read_dbx_symtab (objfile
);
574 /* Add the dynamic symbols. */
576 read_dbx_dynamic_symtab (objfile
);
578 /* Install any minimal symbols that have been collected as the current
579 minimal symbols for this objfile. */
581 install_minimal_symbols (objfile
);
583 do_cleanups (back_to
);
586 /* Initialize anything that needs initializing when a completely new
587 symbol file is specified (not just adding some symbols from another
588 file, e.g. a shared library). */
591 dbx_new_init (struct objfile
*ignore
)
593 stabsread_new_init ();
594 buildsym_new_init ();
595 init_header_files ();
599 /* dbx_symfile_init ()
600 is the dbx-specific initialization routine for reading symbols.
601 It is passed a struct objfile which contains, among other things,
602 the BFD for the file whose symbols are being read, and a slot for a pointer
603 to "private data" which we fill with goodies.
605 We read the string table into malloc'd space and stash a pointer to it.
607 Since BFD doesn't know how to read debug symbols in a format-independent
608 way (and may never do so...), we have to do it ourselves. We will never
609 be called unless this is an a.out (or very similar) file.
610 FIXME, there should be a cleaner peephole into the BFD environment here. */
612 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
615 dbx_symfile_init (struct objfile
*objfile
)
618 bfd
*sym_bfd
= objfile
->obfd
;
619 char *name
= bfd_get_filename (sym_bfd
);
621 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
622 struct dbx_symfile_info
*dbx
;
624 /* Allocate struct to keep track of the symfile. */
625 dbx
= XCNEW (struct dbx_symfile_info
);
626 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
628 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
629 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
630 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
632 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
633 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
634 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
636 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
638 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
640 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
642 error (_("Can't find .text section in symbol file"));
643 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
644 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
646 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
647 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
648 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
650 /* Read the string table and stash it away in the objfile_obstack.
651 When we blow away the objfile the string table goes away as well.
652 Note that gdb used to use the results of attempting to malloc the
653 string table, based on the size it read, as a form of sanity check
654 for botched byte swapping, on the theory that a byte swapped string
655 table size would be so totally bogus that the malloc would fail. Now
656 that we put in on the objfile_obstack, we can't do this since gdb gets
657 a fatal error (out of virtual memory) if the size is bogus. We can
658 however at least check to see if the size is less than the size of
659 the size field itself, or larger than the size of the entire file.
660 Note that all valid string tables have a size greater than zero, since
661 the bytes used to hold the size are included in the count. */
663 if (STRING_TABLE_OFFSET
== 0)
665 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
666 will never be zero, even when there is no string table. This
667 would appear to be a bug in bfd. */
668 DBX_STRINGTAB_SIZE (objfile
) = 0;
669 DBX_STRINGTAB (objfile
) = NULL
;
673 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
675 perror_with_name (name
);
677 memset (size_temp
, 0, sizeof (size_temp
));
678 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
681 perror_with_name (name
);
685 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
686 EOF if there is no string table, and attempting to read the size
687 from EOF will read zero bytes. */
688 DBX_STRINGTAB_SIZE (objfile
) = 0;
689 DBX_STRINGTAB (objfile
) = NULL
;
693 /* Read some data that would appear to be the string table size.
694 If there really is a string table, then it is probably the right
695 size. Byteswap if necessary and validate the size. Note that
696 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
697 random data that happened to be at STRING_TABLE_OFFSET, because
698 bfd can't tell us there is no string table, the sanity checks may
699 or may not catch this. */
700 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
702 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
703 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
704 error (_("ridiculous string table size (%d bytes)."),
705 DBX_STRINGTAB_SIZE (objfile
));
707 DBX_STRINGTAB (objfile
) =
708 (char *) obstack_alloc (&objfile
->objfile_obstack
,
709 DBX_STRINGTAB_SIZE (objfile
));
710 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
712 /* Now read in the string table in one big gulp. */
714 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
716 perror_with_name (name
);
717 val
= bfd_bread (DBX_STRINGTAB (objfile
),
718 DBX_STRINGTAB_SIZE (objfile
),
720 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
721 perror_with_name (name
);
726 /* Perform any local cleanups required when we are done with a particular
727 objfile. I.E, we are in the process of discarding all symbol information
728 for an objfile, freeing up all memory held for it, and unlinking the
729 objfile struct from the global list of known objfiles. */
732 dbx_symfile_finish (struct objfile
*objfile
)
734 free_header_files ();
738 dbx_free_symfile_info (struct objfile
*objfile
, void *arg
)
740 struct dbx_symfile_info
*dbx
= arg
;
742 if (dbx
->header_files
!= NULL
)
744 int i
= dbx
->n_header_files
;
745 struct header_file
*hfiles
= dbx
->header_files
;
749 xfree (hfiles
[i
].name
);
750 xfree (hfiles
[i
].vector
);
760 /* Buffer for reading the symbol table entries. */
761 static struct external_nlist symbuf
[4096];
762 static int symbuf_idx
;
763 static int symbuf_end
;
765 /* Name of last function encountered. Used in Solaris to approximate
766 object file boundaries. */
767 static char *last_function_name
;
769 /* The address in memory of the string table of the object file we are
770 reading (which might not be the "main" object file, but might be a
771 shared library or some other dynamically loaded thing). This is
772 set by read_dbx_symtab when building psymtabs, and by
773 read_ofile_symtab when building symtabs, and is used only by
774 next_symbol_text. FIXME: If that is true, we don't need it when
775 building psymtabs, right? */
776 static char *stringtab_global
;
778 /* These variables are used to control fill_symbuf when the stabs
779 symbols are not contiguous (as may be the case when a COFF file is
780 linked using --split-by-reloc). */
781 static struct stab_section_list
*symbuf_sections
;
782 static unsigned int symbuf_left
;
783 static unsigned int symbuf_read
;
785 /* This variable stores a global stabs buffer, if we read stabs into
786 memory in one chunk in order to process relocations. */
787 static bfd_byte
*stabs_data
;
789 /* Refill the symbol table input buffer
790 and set the variables that control fetching entries from it.
791 Reports an error if no data available.
792 This function can read past the end of the symbol table
793 (into the string table) but this does no harm. */
796 fill_symbuf (bfd
*sym_bfd
)
803 nbytes
= sizeof (symbuf
);
804 if (nbytes
> symbuf_left
)
805 nbytes
= symbuf_left
;
806 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
808 else if (symbuf_sections
== NULL
)
810 count
= sizeof (symbuf
);
811 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
815 if (symbuf_left
<= 0)
817 file_ptr filepos
= symbuf_sections
->section
->filepos
;
819 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
820 perror_with_name (bfd_get_filename (sym_bfd
));
821 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
822 symbol_table_offset
= filepos
- symbuf_read
;
823 symbuf_sections
= symbuf_sections
->next
;
827 if (count
> sizeof (symbuf
))
828 count
= sizeof (symbuf
);
829 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
833 perror_with_name (bfd_get_filename (sym_bfd
));
834 else if (nbytes
== 0)
835 error (_("Premature end of file reading symbol table"));
836 symbuf_end
= nbytes
/ symbol_size
;
838 symbuf_left
-= nbytes
;
839 symbuf_read
+= nbytes
;
843 stabs_seek (int sym_offset
)
847 symbuf_read
+= sym_offset
;
848 symbuf_left
-= sym_offset
;
851 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
854 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
856 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
857 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
858 (intern).n_other = 0; \
859 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
860 if (bfd_get_sign_extend_vma (abfd)) \
861 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
863 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
866 /* Invariant: The symbol pointed to by symbuf_idx is the first one
867 that hasn't been swapped. Swap the symbol at the same time
868 that symbuf_idx is incremented. */
870 /* dbx allows the text of a symbol name to be continued into the
871 next symbol name! When such a continuation is encountered
872 (a \ at the end of the text of a name)
873 call this function to get the continuation. */
876 dbx_next_symbol_text (struct objfile
*objfile
)
878 struct internal_nlist nlist
;
880 if (symbuf_idx
== symbuf_end
)
881 fill_symbuf (symfile_bfd
);
884 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
885 OBJSTAT (objfile
, n_stabs
++);
889 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
892 /* Initialize the list of bincls to contain none and have some
896 init_bincl_list (int number
, struct objfile
*objfile
)
898 bincls_allocated
= number
;
899 next_bincl
= bincl_list
= (struct header_file_location
*)
900 xmalloc (bincls_allocated
* sizeof (struct header_file_location
));
903 /* Add a bincl to the list. */
906 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
908 if (next_bincl
>= bincl_list
+ bincls_allocated
)
910 int offset
= next_bincl
- bincl_list
;
912 bincls_allocated
*= 2;
913 bincl_list
= (struct header_file_location
*)
914 xrealloc ((char *) bincl_list
,
915 bincls_allocated
* sizeof (struct header_file_location
));
916 next_bincl
= bincl_list
+ offset
;
918 next_bincl
->pst
= pst
;
919 next_bincl
->instance
= instance
;
920 next_bincl
++->name
= name
;
923 /* Given a name, value pair, find the corresponding
924 bincl in the list. Return the partial symtab associated
925 with that header_file_location. */
927 static struct partial_symtab
*
928 find_corresponding_bincl_psymtab (char *name
, int instance
)
930 struct header_file_location
*bincl
;
932 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
933 if (bincl
->instance
== instance
934 && strcmp (name
, bincl
->name
) == 0)
937 repeated_header_complaint (name
, symnum
);
938 return (struct partial_symtab
*) 0;
941 /* Free the storage allocated for the bincl list. */
944 free_bincl_list (struct objfile
*objfile
)
947 bincls_allocated
= 0;
951 do_free_bincl_list_cleanup (void *objfile
)
953 free_bincl_list (objfile
);
956 static struct cleanup
*
957 make_cleanup_free_bincl_list (struct objfile
*objfile
)
959 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
962 /* Set namestring based on nlist. If the string table index is invalid,
963 give a fake name, and print a single error message per symbol file read,
964 rather than abort the symbol reading or flood the user with messages. */
967 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
971 if (nlist
->n_strx
+ file_string_table_offset
972 >= DBX_STRINGTAB_SIZE (objfile
)
973 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
975 complaint (&symfile_complaints
,
976 _("bad string table offset in symbol %d"),
978 namestring
= "<bad string table offset>";
981 namestring
= (nlist
->n_strx
+ file_string_table_offset
982 + DBX_STRINGTAB (objfile
));
986 /* Scan a SunOs dynamic symbol table for symbols of interest and
987 add them to the minimal symbol table. */
990 read_dbx_dynamic_symtab (struct objfile
*objfile
)
992 bfd
*abfd
= objfile
->obfd
;
993 struct cleanup
*back_to
;
1003 CORE_ADDR sym_value
;
1006 /* Check that the symbol file has dynamic symbols that we know about.
1007 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1008 on a sun4 host (and vice versa) and bfd is not configured
1009 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1010 so we ignore the dynamic symbols in this case. */
1011 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1012 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1013 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1016 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1017 if (dynsym_size
< 0)
1020 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1021 back_to
= make_cleanup (xfree
, dynsyms
);
1023 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1024 if (dynsym_count
< 0)
1026 do_cleanups (back_to
);
1030 /* Enter dynamic symbols into the minimal symbol table
1031 if this is a stripped executable. */
1032 if (bfd_get_symcount (abfd
) <= 0)
1035 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1037 asymbol
*sym
= *symptr
;
1041 sec
= bfd_get_section (sym
);
1043 /* BFD symbols are section relative. */
1044 sym_value
= sym
->value
+ sec
->vma
;
1046 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1050 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1054 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1061 if (sym
->flags
& BSF_GLOBAL
)
1064 record_minimal_symbol (bfd_asymbol_name (sym
), sym_value
,
1069 /* Symbols from shared libraries have a dynamic relocation entry
1070 that points to the associated slot in the procedure linkage table.
1071 We make a mininal symbol table entry with type mst_solib_trampoline
1072 at the address in the procedure linkage table. */
1073 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1074 if (dynrel_size
< 0)
1076 do_cleanups (back_to
);
1080 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1081 make_cleanup (xfree
, dynrels
);
1083 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1084 if (dynrel_count
< 0)
1086 do_cleanups (back_to
);
1090 for (counter
= 0, relptr
= dynrels
;
1091 counter
< dynrel_count
;
1092 counter
++, relptr
++)
1094 arelent
*rel
= *relptr
;
1095 CORE_ADDR address
= rel
->address
;
1097 switch (bfd_get_arch (abfd
))
1099 case bfd_arch_sparc
:
1100 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1104 /* `16' is the type BFD produces for a jump table relocation. */
1105 if (rel
->howto
->type
!= 16)
1108 /* Adjust address in the jump table to point to
1109 the start of the bsr instruction. */
1116 name
= bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1117 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1121 do_cleanups (back_to
);
1125 find_stab_function_addr (char *namestring
, const char *filename
,
1126 struct objfile
*objfile
)
1128 struct bound_minimal_symbol msym
;
1132 p
= strchr (namestring
, ':');
1137 strncpy (p
, namestring
, n
);
1140 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1141 if (msym
.minsym
== NULL
)
1143 /* Sun Fortran appends an underscore to the minimal symbol name,
1144 try again with an appended underscore if the minimal symbol
1148 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1151 if (msym
.minsym
== NULL
&& filename
!= NULL
)
1153 /* Try again without the filename. */
1155 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1157 if (msym
.minsym
== NULL
&& filename
!= NULL
)
1159 /* And try again for Sun Fortran, but without the filename. */
1162 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1165 return msym
.minsym
== NULL
? 0 : BMSYMBOL_VALUE_ADDRESS (msym
);
1169 function_outside_compilation_unit_complaint (const char *arg1
)
1171 complaint (&symfile_complaints
,
1172 _("function `%s' appears to be defined "
1173 "outside of all compilation units"),
1177 /* Setup partial_symtab's describing each source file for which
1178 debugging information is available. */
1181 read_dbx_symtab (struct objfile
*objfile
)
1183 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1184 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
1185 struct internal_nlist nlist
;
1186 CORE_ADDR text_addr
;
1193 int past_first_source_file
= 0;
1194 CORE_ADDR last_function_start
= 0;
1195 struct cleanup
*back_to
;
1197 int textlow_not_set
;
1198 int data_sect_index
;
1200 /* Current partial symtab. */
1201 struct partial_symtab
*pst
;
1203 /* List of current psymtab's include files. */
1204 const char **psymtab_include_list
;
1205 int includes_allocated
;
1208 /* Index within current psymtab dependency list. */
1209 struct partial_symtab
**dependency_list
;
1210 int dependencies_used
, dependencies_allocated
;
1212 text_addr
= DBX_TEXT_ADDR (objfile
);
1213 text_size
= DBX_TEXT_SIZE (objfile
);
1215 /* FIXME. We probably want to change stringtab_global rather than add this
1216 while processing every symbol entry. FIXME. */
1217 file_string_table_offset
= 0;
1218 next_file_string_table_offset
= 0;
1220 stringtab_global
= DBX_STRINGTAB (objfile
);
1222 pst
= (struct partial_symtab
*) 0;
1224 includes_allocated
= 30;
1226 psymtab_include_list
= (const char **) alloca (includes_allocated
*
1227 sizeof (const char *));
1229 dependencies_allocated
= 30;
1230 dependencies_used
= 0;
1232 (struct partial_symtab
**) alloca (dependencies_allocated
*
1233 sizeof (struct partial_symtab
*));
1235 /* Init bincl list */
1236 init_bincl_list (20, objfile
);
1237 back_to
= make_cleanup_free_bincl_list (objfile
);
1239 set_last_source_file (NULL
);
1241 lowest_text_address
= (CORE_ADDR
) -1;
1243 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1244 abfd
= objfile
->obfd
;
1245 symbuf_end
= symbuf_idx
= 0;
1246 next_symbol_text_func
= dbx_next_symbol_text
;
1247 textlow_not_set
= 1;
1248 has_line_numbers
= 0;
1250 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1251 to global and static variables. The stab for a global or static
1252 variable doesn't give us any indication of which section it's in,
1253 so we can't tell immediately which offset in
1254 objfile->section_offsets we should apply to the variable's
1257 We could certainly find out which section contains the variable
1258 by looking up the variable's unrelocated address with
1259 find_pc_section, but that would be expensive; this is the
1260 function that constructs the partial symbol tables by examining
1261 every symbol in the entire executable, and it's
1262 performance-critical. So that expense would not be welcome. I'm
1263 not sure what to do about this at the moment.
1265 What we have done for years is to simply assume that the .data
1266 section's offset is appropriate for all global and static
1267 variables. Recently, this was expanded to fall back to the .bss
1268 section's offset if there is no .data section, and then to the
1269 .rodata section's offset. */
1270 data_sect_index
= objfile
->sect_index_data
;
1271 if (data_sect_index
== -1)
1272 data_sect_index
= SECT_OFF_BSS (objfile
);
1273 if (data_sect_index
== -1)
1274 data_sect_index
= SECT_OFF_RODATA (objfile
);
1276 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1277 for the file to have no .data, no .bss, and no .text at all, if
1278 it also has no global or static variables. If it does, we will
1279 get an internal error from an ANOFFSET macro below when we try to
1280 use data_sect_index. */
1282 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1284 /* Get the symbol for this run and pull out some info. */
1285 QUIT
; /* Allow this to be interruptable. */
1286 if (symbuf_idx
== symbuf_end
)
1288 bufp
= &symbuf
[symbuf_idx
++];
1291 * Special case to speed up readin.
1293 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1295 has_line_numbers
= 1;
1299 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1300 OBJSTAT (objfile
, n_stabs
++);
1302 /* Ok. There is a lot of code duplicated in the rest of this
1303 switch statement (for efficiency reasons). Since I don't
1304 like duplicating code, I will do my penance here, and
1305 describe the code which is duplicated:
1307 *) The assignment to namestring.
1308 *) The call to strchr.
1309 *) The addition of a partial symbol the two partial
1310 symbol lists. This last is a large section of code, so
1311 I've imbedded it in the following macro. */
1313 switch (nlist
.n_type
)
1316 * Standard, external, non-debugger, symbols
1319 case N_TEXT
| N_EXT
:
1320 case N_NBTEXT
| N_EXT
:
1323 case N_DATA
| N_EXT
:
1324 case N_NBDATA
| N_EXT
:
1329 case N_NBBSS
| N_EXT
:
1330 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1335 namestring
= set_namestring (objfile
, &nlist
);
1337 record_minimal_symbol (namestring
, nlist
.n_value
,
1338 nlist
.n_type
, objfile
); /* Always */
1341 /* Standard, local, non-debugger, symbols. */
1345 /* We need to be able to deal with both N_FN or N_TEXT,
1346 because we have no way of knowing whether the sys-supplied ld
1347 or GNU ld was used to make the executable. Sequents throw
1348 in another wrinkle -- they renumbered N_FN. */
1353 namestring
= set_namestring (objfile
, &nlist
);
1355 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1356 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1357 && namestring
[nsl
- 2] == '.'))
1359 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1360 SECT_OFF_TEXT (objfile
));
1362 if (past_first_source_file
&& pst
1363 /* The gould NP1 uses low values for .o and -l symbols
1364 which are not the address. */
1365 && nlist
.n_value
>= pst
->textlow
)
1367 end_psymtab (objfile
, pst
, psymtab_include_list
,
1368 includes_used
, symnum
* symbol_size
,
1369 nlist
.n_value
> pst
->texthigh
1370 ? nlist
.n_value
: pst
->texthigh
,
1371 dependency_list
, dependencies_used
,
1373 pst
= (struct partial_symtab
*) 0;
1375 dependencies_used
= 0;
1376 has_line_numbers
= 0;
1379 past_first_source_file
= 1;
1388 case N_UNDF
| N_EXT
:
1389 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1390 We used to rely on the target to tell us whether it knows
1391 where the symbol has been relocated to, but none of the
1392 target implementations actually provided that operation.
1393 So we just ignore the symbol, the same way we would do if
1394 we had a target-side symbol lookup which returned no match.
1396 All other symbols (with nlist.n_value == 0), are really
1397 undefined, and so we ignore them too. */
1401 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1403 /* Deal with relative offsets in the string table
1404 used in ELF+STAB under Solaris. If we want to use the
1405 n_strx field, which contains the name of the file,
1406 we must adjust file_string_table_offset *before* calling
1407 set_namestring(). */
1408 past_first_source_file
= 1;
1409 file_string_table_offset
= next_file_string_table_offset
;
1410 next_file_string_table_offset
=
1411 file_string_table_offset
+ nlist
.n_value
;
1412 if (next_file_string_table_offset
< file_string_table_offset
)
1413 error (_("string table offset backs up at %d"), symnum
);
1414 /* FIXME -- replace error() with complaint. */
1419 /* Lots of symbol types we can just ignore. */
1426 /* Keep going . . . */
1429 * Special symbol types for GNU
1432 case N_INDR
| N_EXT
:
1434 case N_SETA
| N_EXT
:
1436 case N_SETT
| N_EXT
:
1438 case N_SETD
| N_EXT
:
1440 case N_SETB
| N_EXT
:
1451 static int prev_so_symnum
= -10;
1452 static int first_so_symnum
;
1454 static char *dirname_nso
;
1455 int prev_textlow_not_set
;
1457 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1458 SECT_OFF_TEXT (objfile
));
1460 prev_textlow_not_set
= textlow_not_set
;
1462 /* A zero value is probably an indication for the SunPRO 3.0
1463 compiler. end_psymtab explicitly tests for zero, so
1464 don't relocate it. */
1466 if (nlist
.n_value
== 0
1467 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1469 textlow_not_set
= 1;
1473 textlow_not_set
= 0;
1475 past_first_source_file
= 1;
1477 if (prev_so_symnum
!= symnum
- 1)
1478 { /* Here if prev stab wasn't N_SO. */
1479 first_so_symnum
= symnum
;
1483 end_psymtab (objfile
, pst
, psymtab_include_list
,
1484 includes_used
, symnum
* symbol_size
,
1485 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1486 dependency_list
, dependencies_used
,
1487 prev_textlow_not_set
);
1488 pst
= (struct partial_symtab
*) 0;
1490 dependencies_used
= 0;
1491 has_line_numbers
= 0;
1495 prev_so_symnum
= symnum
;
1497 /* End the current partial symtab and start a new one. */
1499 namestring
= set_namestring (objfile
, &nlist
);
1501 /* Null name means end of .o file. Don't start a new one. */
1502 if (*namestring
== '\000')
1505 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1506 The first one is a directory name; the second the file name.
1507 If pst exists, is empty, and has a filename ending in '/',
1508 we assume the previous N_SO was a directory name. */
1510 p
= lbasename (namestring
);
1511 if (p
!= namestring
&& *p
== '\000')
1513 /* Save the directory name SOs locally, then save it into
1514 the psymtab when it's created below. */
1515 dirname_nso
= namestring
;
1519 /* Some other compilers (C++ ones in particular) emit useless
1520 SOs for non-existant .c files. We ignore all subsequent SOs
1521 that immediately follow the first. */
1525 pst
= start_psymtab (objfile
,
1527 first_so_symnum
* symbol_size
,
1528 objfile
->global_psymbols
.next
,
1529 objfile
->static_psymbols
.next
);
1530 pst
->dirname
= dirname_nso
;
1538 enum language tmp_language
;
1540 /* Add this bincl to the bincl_list for future EXCLs. No
1541 need to save the string; it'll be around until
1542 read_dbx_symtab function returns. */
1544 namestring
= set_namestring (objfile
, &nlist
);
1545 tmp_language
= deduce_language_from_filename (namestring
);
1547 /* Only change the psymtab's language if we've learned
1548 something useful (eg. tmp_language is not language_unknown).
1549 In addition, to match what start_subfile does, never change
1551 if (tmp_language
!= language_unknown
1552 && (tmp_language
!= language_c
1553 || psymtab_language
!= language_cplus
))
1554 psymtab_language
= tmp_language
;
1558 /* FIXME: we should not get here without a PST to work on.
1559 Attempt to recover. */
1560 complaint (&symfile_complaints
,
1561 _("N_BINCL %s not in entries for "
1562 "any file, at symtab pos %d"),
1563 namestring
, symnum
);
1566 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1568 /* Mark down an include file in the current psymtab. */
1570 goto record_include_file
;
1575 enum language tmp_language
;
1577 /* Mark down an include file in the current psymtab. */
1578 namestring
= set_namestring (objfile
, &nlist
);
1579 tmp_language
= deduce_language_from_filename (namestring
);
1581 /* Only change the psymtab's language if we've learned
1582 something useful (eg. tmp_language is not language_unknown).
1583 In addition, to match what start_subfile does, never change
1585 if (tmp_language
!= language_unknown
1586 && (tmp_language
!= language_c
1587 || psymtab_language
!= language_cplus
))
1588 psymtab_language
= tmp_language
;
1590 /* In C++, one may expect the same filename to come round many
1591 times, when code is coming alternately from the main file
1592 and from inline functions in other files. So I check to see
1593 if this is a file we've seen before -- either the main
1594 source file, or a previously included file.
1596 This seems to be a lot of time to be spending on N_SOL, but
1597 things like "break c-exp.y:435" need to work (I
1598 suppose the psymtab_include_list could be hashed or put
1599 in a binary tree, if profiling shows this is a major hog). */
1600 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
1605 for (i
= 0; i
< includes_used
; i
++)
1606 if (filename_cmp (namestring
, psymtab_include_list
[i
]) == 0)
1615 record_include_file
:
1617 psymtab_include_list
[includes_used
++] = namestring
;
1618 if (includes_used
>= includes_allocated
)
1620 const char **orig
= psymtab_include_list
;
1622 psymtab_include_list
= (const char **)
1623 alloca ((includes_allocated
*= 2) * sizeof (const char *));
1624 memcpy (psymtab_include_list
, orig
,
1625 includes_used
* sizeof (const char *));
1629 case N_LSYM
: /* Typedef or automatic variable. */
1630 case N_STSYM
: /* Data seg var -- static. */
1631 case N_LCSYM
: /* BSS " */
1632 case N_ROSYM
: /* Read-only data seg var -- static. */
1633 case N_NBSTS
: /* Gould nobase. */
1634 case N_NBLCS
: /* symbols. */
1636 case N_GSYM
: /* Global (extern) variable; can be
1637 data or bss (sigh FIXME). */
1639 /* Following may probably be ignored; I'll leave them here
1640 for now (until I do Pascal and Modula 2 extensions). */
1642 case N_PC
: /* I may or may not need this; I
1644 case N_M2C
: /* I suspect that I can ignore this here. */
1645 case N_SCOPE
: /* Same. */
1649 namestring
= set_namestring (objfile
, &nlist
);
1651 /* See if this is an end of function stab. */
1652 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1656 /* It's value is the size (in bytes) of the function for
1657 function relative stabs, or the address of the function's
1658 end for old style stabs. */
1659 valu
= nlist
.n_value
+ last_function_start
;
1660 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1661 pst
->texthigh
= valu
;
1665 p
= (char *) strchr (namestring
, ':');
1667 continue; /* Not a debugging symbol. */
1670 sym_name
= NULL
; /* pacify "gcc -Werror" */
1671 if (psymtab_language
== language_cplus
)
1673 char *new_name
, *name
= xmalloc (p
- namestring
+ 1);
1674 memcpy (name
, namestring
, p
- namestring
);
1676 name
[p
- namestring
] = '\0';
1677 new_name
= cp_canonicalize_string (name
);
1678 if (new_name
!= NULL
)
1680 sym_len
= strlen (new_name
);
1681 sym_name
= obstack_copy0 (&objfile
->objfile_obstack
,
1690 sym_name
= namestring
;
1691 sym_len
= p
- namestring
;
1694 /* Main processing section for debugging symbols which
1695 the initial read through the symbol tables needs to worry
1696 about. If we reach this point, the symbol which we are
1697 considering is definitely one we are interested in.
1698 p must also contain the (valid) index into the namestring
1699 which indicates the debugging type symbol. */
1704 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1707 if (gdbarch_static_transform_name_p (gdbarch
))
1708 gdbarch_static_transform_name (gdbarch
, namestring
);
1710 add_psymbol_to_list (sym_name
, sym_len
, 1,
1711 VAR_DOMAIN
, LOC_STATIC
,
1712 &objfile
->static_psymbols
,
1714 psymtab_language
, objfile
);
1718 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1720 /* The addresses in these entries are reported to be
1721 wrong. See the code that reads 'G's for symtabs. */
1722 add_psymbol_to_list (sym_name
, sym_len
, 1,
1723 VAR_DOMAIN
, LOC_STATIC
,
1724 &objfile
->global_psymbols
,
1726 psymtab_language
, objfile
);
1730 /* When a 'T' entry is defining an anonymous enum, it
1731 may have a name which is the empty string, or a
1732 single space. Since they're not really defining a
1733 symbol, those shouldn't go in the partial symbol
1734 table. We do pick up the elements of such enums at
1735 'check_enum:', below. */
1736 if (p
>= namestring
+ 2
1737 || (p
== namestring
+ 1
1738 && namestring
[0] != ' '))
1740 add_psymbol_to_list (sym_name
, sym_len
, 1,
1741 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1742 &objfile
->static_psymbols
,
1744 psymtab_language
, objfile
);
1747 /* Also a typedef with the same name. */
1748 add_psymbol_to_list (sym_name
, sym_len
, 1,
1749 VAR_DOMAIN
, LOC_TYPEDEF
,
1750 &objfile
->static_psymbols
,
1752 psymtab_language
, objfile
);
1759 if (p
!= namestring
) /* a name is there, not just :T... */
1761 add_psymbol_to_list (sym_name
, sym_len
, 1,
1762 VAR_DOMAIN
, LOC_TYPEDEF
,
1763 &objfile
->static_psymbols
,
1765 psymtab_language
, objfile
);
1768 /* If this is an enumerated type, we need to
1769 add all the enum constants to the partial symbol
1770 table. This does not cover enums without names, e.g.
1771 "enum {a, b} c;" in C, but fortunately those are
1772 rare. There is no way for GDB to find those from the
1773 enum type without spending too much time on it. Thus
1774 to solve this problem, the compiler needs to put out the
1775 enum in a nameless type. GCC2 does this. */
1777 /* We are looking for something of the form
1778 <name> ":" ("t" | "T") [<number> "="] "e"
1779 {<constant> ":" <value> ","} ";". */
1781 /* Skip over the colon and the 't' or 'T'. */
1783 /* This type may be given a number. Also, numbers can come
1784 in pairs like (0,26). Skip over it. */
1785 while ((*p
>= '0' && *p
<= '9')
1786 || *p
== '(' || *p
== ',' || *p
== ')'
1792 /* The aix4 compiler emits extra crud before the members. */
1795 /* Skip over the type (?). */
1799 /* Skip over the colon. */
1803 /* We have found an enumerated type. */
1804 /* According to comments in read_enum_type
1805 a comma could end it instead of a semicolon.
1806 I don't know where that happens.
1808 while (*p
&& *p
!= ';' && *p
!= ',')
1812 /* Check for and handle cretinous dbx symbol name
1814 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1815 p
= next_symbol_text (objfile
);
1817 /* Point to the character after the name
1818 of the enum constant. */
1819 for (q
= p
; *q
&& *q
!= ':'; q
++)
1821 /* Note that the value doesn't matter for
1822 enum constants in psymtabs, just in symtabs. */
1823 add_psymbol_to_list (p
, q
- p
, 1,
1824 VAR_DOMAIN
, LOC_CONST
,
1825 &objfile
->static_psymbols
, 0,
1826 0, psymtab_language
, objfile
);
1827 /* Point past the name. */
1829 /* Skip over the value. */
1830 while (*p
&& *p
!= ',')
1832 /* Advance past the comma. */
1840 /* Constant, e.g. from "const" in Pascal. */
1841 add_psymbol_to_list (sym_name
, sym_len
, 1,
1842 VAR_DOMAIN
, LOC_CONST
,
1843 &objfile
->static_psymbols
, nlist
.n_value
,
1844 0, psymtab_language
, objfile
);
1850 int name_len
= p
- namestring
;
1851 char *name
= xmalloc (name_len
+ 1);
1853 memcpy (name
, namestring
, name_len
);
1854 name
[name_len
] = '\0';
1855 function_outside_compilation_unit_complaint (name
);
1858 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1859 SECT_OFF_TEXT (objfile
));
1860 /* Kludges for ELF/STABS with Sun ACC. */
1861 last_function_name
= namestring
;
1862 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1863 value for the bottom of the text seg in those cases. */
1864 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1865 SECT_OFF_TEXT (objfile
))
1866 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1868 CORE_ADDR minsym_valu
=
1869 find_stab_function_addr (namestring
,
1870 pst
? pst
->filename
: NULL
,
1873 /* find_stab_function_addr will return 0 if the minimal
1874 symbol wasn't found. (Unfortunately, this might also
1875 be a valid address.) Anyway, if it *does* return 0,
1876 it is likely that the value was set correctly to begin
1878 if (minsym_valu
!= 0)
1879 nlist
.n_value
= minsym_valu
;
1881 if (pst
&& textlow_not_set
1882 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1884 pst
->textlow
= nlist
.n_value
;
1885 textlow_not_set
= 0;
1889 /* Keep track of the start of the last function so we
1890 can handle end of function symbols. */
1891 last_function_start
= nlist
.n_value
;
1893 /* In reordered executables this function may lie outside
1894 the bounds created by N_SO symbols. If that's the case
1895 use the address of this function as the low bound for
1896 the partial symbol table. */
1899 || (nlist
.n_value
< pst
->textlow
1901 != ANOFFSET (objfile
->section_offsets
,
1902 SECT_OFF_TEXT (objfile
))))))
1904 pst
->textlow
= nlist
.n_value
;
1905 textlow_not_set
= 0;
1907 add_psymbol_to_list (sym_name
, sym_len
, 1,
1908 VAR_DOMAIN
, LOC_BLOCK
,
1909 &objfile
->static_psymbols
,
1911 psymtab_language
, objfile
);
1914 /* Global functions were ignored here, but now they
1915 are put into the global psymtab like one would expect.
1916 They're also in the minimal symbol table. */
1920 int name_len
= p
- namestring
;
1921 char *name
= xmalloc (name_len
+ 1);
1923 memcpy (name
, namestring
, name_len
);
1924 name
[name_len
] = '\0';
1925 function_outside_compilation_unit_complaint (name
);
1928 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1929 SECT_OFF_TEXT (objfile
));
1930 /* Kludges for ELF/STABS with Sun ACC. */
1931 last_function_name
= namestring
;
1932 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1933 value for the bottom of the text seg in those cases. */
1934 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1935 SECT_OFF_TEXT (objfile
))
1936 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1938 CORE_ADDR minsym_valu
=
1939 find_stab_function_addr (namestring
,
1940 pst
? pst
->filename
: NULL
,
1943 /* find_stab_function_addr will return 0 if the minimal
1944 symbol wasn't found. (Unfortunately, this might also
1945 be a valid address.) Anyway, if it *does* return 0,
1946 it is likely that the value was set correctly to begin
1948 if (minsym_valu
!= 0)
1949 nlist
.n_value
= minsym_valu
;
1951 if (pst
&& textlow_not_set
1952 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1954 pst
->textlow
= nlist
.n_value
;
1955 textlow_not_set
= 0;
1959 /* Keep track of the start of the last function so we
1960 can handle end of function symbols. */
1961 last_function_start
= nlist
.n_value
;
1963 /* In reordered executables this function may lie outside
1964 the bounds created by N_SO symbols. If that's the case
1965 use the address of this function as the low bound for
1966 the partial symbol table. */
1969 || (nlist
.n_value
< pst
->textlow
1971 != ANOFFSET (objfile
->section_offsets
,
1972 SECT_OFF_TEXT (objfile
))))))
1974 pst
->textlow
= nlist
.n_value
;
1975 textlow_not_set
= 0;
1977 add_psymbol_to_list (sym_name
, sym_len
, 1,
1978 VAR_DOMAIN
, LOC_BLOCK
,
1979 &objfile
->global_psymbols
,
1981 psymtab_language
, objfile
);
1984 /* Two things show up here (hopefully); static symbols of
1985 local scope (static used inside braces) or extensions
1986 of structure symbols. We can ignore both. */
2000 case '#': /* For symbol identification (used in live ranges). */
2004 /* It is a C++ nested symbol. We don't need to record it
2005 (I don't think); if we try to look up foo::bar::baz,
2006 then symbols for the symtab containing foo should get
2007 read in, I think. */
2008 /* Someone says sun cc puts out symbols like
2009 /foo/baz/maclib::/usr/local/bin/maclib,
2010 which would get here with a symbol type of ':'. */
2014 /* Unexpected symbol descriptor. The second and subsequent stabs
2015 of a continued stab can show up here. The question is
2016 whether they ever can mimic a normal stab--it would be
2017 nice if not, since we certainly don't want to spend the
2018 time searching to the end of every string looking for
2021 complaint (&symfile_complaints
,
2022 _("unknown symbol descriptor `%c'"),
2025 /* Ignore it; perhaps it is an extension that we don't
2033 namestring
= set_namestring (objfile
, &nlist
);
2035 /* Find the corresponding bincl and mark that psymtab on the
2036 psymtab dependency list. */
2038 struct partial_symtab
*needed_pst
=
2039 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2041 /* If this include file was defined earlier in this file,
2043 if (needed_pst
== pst
)
2051 for (i
= 0; i
< dependencies_used
; i
++)
2052 if (dependency_list
[i
] == needed_pst
)
2058 /* If it's already in the list, skip the rest. */
2062 dependency_list
[dependencies_used
++] = needed_pst
;
2063 if (dependencies_used
>= dependencies_allocated
)
2065 struct partial_symtab
**orig
= dependency_list
;
2068 (struct partial_symtab
**)
2069 alloca ((dependencies_allocated
*= 2)
2070 * sizeof (struct partial_symtab
*));
2071 memcpy (dependency_list
, orig
,
2073 * sizeof (struct partial_symtab
*)));
2075 fprintf_unfiltered (gdb_stderr
,
2076 "Had to reallocate "
2077 "dependency list.\n");
2078 fprintf_unfiltered (gdb_stderr
,
2079 "New dependencies allocated: %d\n",
2080 dependencies_allocated
);
2088 /* Solaris 2 end of module, finish current partial symbol table.
2089 end_psymtab will set pst->texthigh to the proper value, which
2090 is necessary if a module compiled without debugging info
2091 follows this module. */
2092 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
2094 end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2095 symnum
* symbol_size
,
2096 (CORE_ADDR
) 0, dependency_list
,
2097 dependencies_used
, textlow_not_set
);
2098 pst
= (struct partial_symtab
*) 0;
2100 dependencies_used
= 0;
2101 has_line_numbers
= 0;
2107 HANDLE_RBRAC (nlist
.n_value
);
2113 case N_SSYM
: /* Claim: Structure or union element.
2114 Hopefully, I can ignore this. */
2115 case N_ENTRY
: /* Alternate entry point; can ignore. */
2116 case N_MAIN
: /* Can definitely ignore this. */
2117 case N_CATCH
: /* These are GNU C++ extensions */
2118 case N_EHDECL
: /* that can safely be ignored here. */
2128 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2129 case N_DEFD
: /* GNU Modula-2 */
2130 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2132 case N_OBJ
: /* Useless types from Solaris. */
2135 /* These symbols aren't interesting; don't worry about them. */
2139 /* If we haven't found it yet, ignore it. It's probably some
2140 new type we don't know about yet. */
2141 unknown_symtype_complaint (hex_string (nlist
.n_type
));
2146 /* If there's stuff to be cleaned up, clean it up. */
2149 /* Don't set pst->texthigh lower than it already is. */
2150 CORE_ADDR text_end
=
2151 (lowest_text_address
== (CORE_ADDR
) -1
2152 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
2153 SECT_OFF_TEXT (objfile
)))
2154 : lowest_text_address
)
2157 end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2158 symnum
* symbol_size
,
2159 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2160 dependency_list
, dependencies_used
, textlow_not_set
);
2163 do_cleanups (back_to
);
2166 /* Allocate and partially fill a partial symtab. It will be
2167 completely filled at the end of the symbol list.
2169 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2170 is the address relative to which its symbols are (incremental) or 0
2173 static struct partial_symtab
*
2174 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2175 int ldsymoff
, struct partial_symbol
**global_syms
,
2176 struct partial_symbol
**static_syms
)
2178 struct partial_symtab
*result
=
2179 start_psymtab_common (objfile
, objfile
->section_offsets
,
2180 filename
, textlow
, global_syms
, static_syms
);
2182 result
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2183 sizeof (struct symloc
));
2184 LDSYMOFF (result
) = ldsymoff
;
2185 result
->read_symtab
= dbx_read_symtab
;
2186 SYMBOL_SIZE (result
) = symbol_size
;
2187 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2188 STRING_OFFSET (result
) = string_table_offset
;
2189 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2192 /* If we're handling an ELF file, drag some section-relocation info
2193 for this source file out of the ELF symbol table, to compensate for
2194 Sun brain death. This replaces the section_offsets in this psymtab,
2196 elfstab_offset_sections (objfile
, result
);
2199 /* Deduce the source language from the filename for this psymtab. */
2200 psymtab_language
= deduce_language_from_filename (filename
);
2205 /* Close off the current usage of PST.
2206 Returns PST or NULL if the partial symtab was empty and thrown away.
2208 FIXME: List variables and peculiarities of same. */
2210 struct partial_symtab
*
2211 end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2212 const char **include_list
, int num_includes
,
2213 int capping_symbol_offset
, CORE_ADDR capping_text
,
2214 struct partial_symtab
**dependency_list
, int number_dependencies
,
2215 int textlow_not_set
)
2218 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2220 if (capping_symbol_offset
!= -1)
2221 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2222 pst
->texthigh
= capping_text
;
2224 /* Under Solaris, the N_SO symbols always have a value of 0,
2225 instead of the usual address of the .o file. Therefore,
2226 we have to do some tricks to fill in texthigh and textlow.
2227 The first trick is: if we see a static
2228 or global function, and the textlow for the current pst
2229 is not set (ie: textlow_not_set), then we use that function's
2230 address for the textlow of the pst. */
2232 /* Now, to fill in texthigh, we remember the last function seen
2233 in the .o file. Also, there's a hack in
2234 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2235 to here via the misc_info field. Therefore, we can fill in
2236 a reliable texthigh by taking the address plus size of the
2237 last function in the file. */
2239 if (pst
->texthigh
== 0 && last_function_name
2240 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2244 struct bound_minimal_symbol minsym
;
2246 p
= strchr (last_function_name
, ':');
2248 p
= last_function_name
;
2249 n
= p
- last_function_name
;
2251 strncpy (p
, last_function_name
, n
);
2254 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2255 if (minsym
.minsym
== NULL
)
2257 /* Sun Fortran appends an underscore to the minimal symbol name,
2258 try again with an appended underscore if the minimal symbol
2262 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2266 pst
->texthigh
= (BMSYMBOL_VALUE_ADDRESS (minsym
)
2267 + MSYMBOL_SIZE (minsym
.minsym
));
2269 last_function_name
= NULL
;
2272 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2274 /* This test will be true if the last .o file is only data. */
2275 else if (textlow_not_set
)
2276 pst
->textlow
= pst
->texthigh
;
2279 struct partial_symtab
*p1
;
2281 /* If we know our own starting text address, then walk through all other
2282 psymtabs for this objfile, and if any didn't know their ending text
2283 address, set it to our starting address. Take care to not set our
2284 own ending address to our starting address, nor to set addresses on
2285 `dependency' files that have both textlow and texthigh zero. */
2287 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2289 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2291 p1
->texthigh
= pst
->textlow
;
2292 /* If this file has only data, then make textlow match
2294 if (p1
->textlow
== 0)
2295 p1
->textlow
= p1
->texthigh
;
2300 /* End of kludge for patching Solaris textlow and texthigh. */
2302 pst
->n_global_syms
=
2303 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
2304 + pst
->globals_offset
);
2305 pst
->n_static_syms
=
2306 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
2307 + pst
->statics_offset
);
2309 pst
->number_of_dependencies
= number_dependencies
;
2310 if (number_dependencies
)
2312 pst
->dependencies
= (struct partial_symtab
**)
2313 obstack_alloc (&objfile
->objfile_obstack
,
2314 number_dependencies
* sizeof (struct partial_symtab
*));
2315 memcpy (pst
->dependencies
, dependency_list
,
2316 number_dependencies
* sizeof (struct partial_symtab
*));
2319 pst
->dependencies
= 0;
2321 for (i
= 0; i
< num_includes
; i
++)
2323 struct partial_symtab
*subpst
=
2324 allocate_psymtab (include_list
[i
], objfile
);
2326 /* Copy the sesction_offsets array from the main psymtab. */
2327 subpst
->section_offsets
= pst
->section_offsets
;
2328 subpst
->read_symtab_private
=
2329 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
2333 subpst
->texthigh
= 0;
2335 /* We could save slight bits of space by only making one of these,
2336 shared by the entire set of include files. FIXME-someday. */
2337 subpst
->dependencies
= (struct partial_symtab
**)
2338 obstack_alloc (&objfile
->objfile_obstack
,
2339 sizeof (struct partial_symtab
*));
2340 subpst
->dependencies
[0] = pst
;
2341 subpst
->number_of_dependencies
= 1;
2343 subpst
->globals_offset
=
2344 subpst
->n_global_syms
=
2345 subpst
->statics_offset
=
2346 subpst
->n_static_syms
= 0;
2350 subpst
->read_symtab
= pst
->read_symtab
;
2353 sort_pst_symbols (objfile
, pst
);
2355 if (num_includes
== 0
2356 && number_dependencies
== 0
2357 && pst
->n_global_syms
== 0
2358 && pst
->n_static_syms
== 0
2359 && has_line_numbers
== 0)
2361 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2362 it is on the obstack, but we can forget to chain it on the list. */
2363 /* Empty psymtabs happen as a result of header files which don't have
2364 any symbols in them. There can be a lot of them. But this check
2365 is wrong, in that a psymtab with N_SLINE entries but nothing else
2366 is not empty, but we don't realize that. Fixing that without slowing
2367 things down might be tricky. */
2369 discard_psymtab (objfile
, pst
);
2371 /* Indicate that psymtab was thrown away. */
2372 pst
= (struct partial_symtab
*) NULL
;
2378 dbx_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
2380 struct cleanup
*old_chain
;
2385 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2386 "Shouldn't happen.\n",
2391 /* Read in all partial symtabs on which this one is dependent. */
2392 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2393 if (!pst
->dependencies
[i
]->readin
)
2395 /* Inform about additional files that need to be read in. */
2398 fputs_filtered (" ", gdb_stdout
);
2400 fputs_filtered ("and ", gdb_stdout
);
2402 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2403 wrap_here (""); /* Flush output. */
2404 gdb_flush (gdb_stdout
);
2406 dbx_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
2409 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2411 /* Init stuff necessary for reading in symbols */
2414 old_chain
= make_cleanup (really_free_pendings
, 0);
2415 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2416 symbol_size
= SYMBOL_SIZE (pst
);
2418 /* Read in this file's symbols. */
2419 bfd_seek (objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2420 read_ofile_symtab (objfile
, pst
);
2422 do_cleanups (old_chain
);
2428 /* Read in all of the symbols for a given psymtab for real.
2429 Be verbose about it if the user wants that. SELF is not NULL. */
2432 dbx_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
2438 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2439 "Shouldn't happen.\n",
2444 if (LDSYMLEN (self
) || self
->number_of_dependencies
)
2446 struct cleanup
*back_to
;
2448 /* Print the message now, before reading the string table,
2449 to avoid disconcerting pauses. */
2452 printf_filtered ("Reading in symbols for %s...", self
->filename
);
2453 gdb_flush (gdb_stdout
);
2456 sym_bfd
= objfile
->obfd
;
2458 next_symbol_text_func
= dbx_next_symbol_text
;
2460 back_to
= make_cleanup (null_cleanup
, NULL
);
2462 if (DBX_STAB_SECTION (objfile
))
2465 = symfile_relocate_debug_section (objfile
,
2466 DBX_STAB_SECTION (objfile
),
2470 make_cleanup (free_current_contents
, (void *) &stabs_data
);
2473 dbx_psymtab_to_symtab_1 (objfile
, self
);
2475 do_cleanups (back_to
);
2477 /* Match with global symbols. This only needs to be done once,
2478 after all of the symtabs and dependencies have been read in. */
2479 scan_file_globals (objfile
);
2481 /* Finish up the debug error message. */
2483 printf_filtered ("done.\n");
2487 /* Read in a defined section of a specific object file's symbols. */
2490 read_ofile_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
2493 struct external_nlist
*bufp
;
2494 struct internal_nlist nlist
;
2496 unsigned max_symnum
;
2498 int sym_offset
; /* Offset to start of symbols to read */
2499 int sym_size
; /* Size of symbols to read */
2500 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2501 int text_size
; /* Size of text segment for symbols */
2502 struct section_offsets
*section_offsets
;
2504 sym_offset
= LDSYMOFF (pst
);
2505 sym_size
= LDSYMLEN (pst
);
2506 text_offset
= pst
->textlow
;
2507 text_size
= pst
->texthigh
- pst
->textlow
;
2508 /* This cannot be simply objfile->section_offsets because of
2509 elfstab_offset_sections() which initializes the psymtab section
2510 offsets information in a special way, and that is different from
2511 objfile->section_offsets. */
2512 section_offsets
= pst
->section_offsets
;
2514 dbxread_objfile
= objfile
;
2516 stringtab_global
= DBX_STRINGTAB (objfile
);
2517 set_last_source_file (NULL
);
2519 abfd
= objfile
->obfd
;
2520 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2521 symbuf_end
= symbuf_idx
= 0;
2523 symbuf_left
= sym_offset
+ sym_size
;
2525 /* It is necessary to actually read one symbol *before* the start
2526 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2527 occurs before the N_SO symbol.
2529 Detecting this in read_dbx_symtab
2530 would slow down initial readin, so we look for it here instead. */
2531 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2533 stabs_seek (sym_offset
- symbol_size
);
2535 bufp
= &symbuf
[symbuf_idx
++];
2536 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2537 OBJSTAT (objfile
, n_stabs
++);
2539 namestring
= set_namestring (objfile
, &nlist
);
2541 processing_gcc_compilation
= 0;
2542 if (nlist
.n_type
== N_TEXT
)
2544 const char *tempstring
= namestring
;
2546 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2547 processing_gcc_compilation
= 1;
2548 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2549 processing_gcc_compilation
= 2;
2550 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2552 if (strncmp (tempstring
, "__gnu_compiled", 14) == 0)
2553 processing_gcc_compilation
= 2;
2558 /* The N_SO starting this symtab is the first symbol, so we
2559 better not check the symbol before it. I'm not this can
2560 happen, but it doesn't hurt to check for it. */
2561 stabs_seek (sym_offset
);
2562 processing_gcc_compilation
= 0;
2565 if (symbuf_idx
== symbuf_end
)
2567 bufp
= &symbuf
[symbuf_idx
];
2568 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2569 error (_("First symbol in segment of executable not a source symbol"));
2571 max_symnum
= sym_size
/ symbol_size
;
2574 symnum
< max_symnum
;
2577 QUIT
; /* Allow this to be interruptable. */
2578 if (symbuf_idx
== symbuf_end
)
2580 bufp
= &symbuf
[symbuf_idx
++];
2581 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2582 OBJSTAT (objfile
, n_stabs
++);
2584 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2586 namestring
= set_namestring (objfile
, &nlist
);
2590 if (sizeof (nlist
.n_value
) > 4
2591 /* We are a 64-bit debugger debugging a 32-bit program. */
2592 && (type
== N_LSYM
|| type
== N_PSYM
))
2593 /* We have to be careful with the n_value in the case of N_LSYM
2594 and N_PSYM entries, because they are signed offsets from frame
2595 pointer, but we actually read them as unsigned 32-bit values.
2596 This is not a problem for 32-bit debuggers, for which negative
2597 values end up being interpreted correctly (as negative
2598 offsets) due to integer overflow.
2599 But we need to sign-extend the value for 64-bit debuggers,
2600 or we'll end up interpreting negative values as very large
2601 positive offsets. */
2602 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2603 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2604 namestring
, section_offsets
, objfile
);
2606 /* We skip checking for a new .o or -l file; that should never
2607 happen in this routine. */
2608 else if (type
== N_TEXT
)
2610 /* I don't think this code will ever be executed, because
2611 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2612 the N_SO symbol which starts this source file.
2613 However, there is no reason not to accept
2614 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2616 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2617 processing_gcc_compilation
= 1;
2618 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2619 processing_gcc_compilation
= 2;
2621 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2622 || type
== (unsigned char) N_NBTEXT
)
2624 /* Global symbol: see if we came across a dbx defintion for
2625 a corresponding symbol. If so, store the value. Remove
2626 syms from the chain when their values are stored, but
2627 search the whole chain, as there may be several syms from
2628 different files with the same name. */
2629 /* This is probably not true. Since the files will be read
2630 in one at a time, each reference to a global symbol will
2631 be satisfied in each file as it appears. So we skip this
2637 /* In a Solaris elf file, this variable, which comes from the
2638 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2639 which comes from pst->textlow is correct. */
2640 if (last_source_start_addr
== 0)
2641 last_source_start_addr
= text_offset
;
2643 /* In reordered executables last_source_start_addr may not be the
2644 lower bound for this symtab, instead use text_offset which comes
2645 from pst->textlow which is correct. */
2646 if (last_source_start_addr
> text_offset
)
2647 last_source_start_addr
= text_offset
;
2649 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
,
2650 SECT_OFF_TEXT (objfile
));
2654 dbxread_objfile
= NULL
;
2658 /* Record the namespace that the function defined by SYMBOL was
2659 defined in, if necessary. BLOCK is the associated block; use
2660 OBSTACK for allocation. */
2663 cp_set_block_scope (const struct symbol
*symbol
,
2664 struct block
*block
,
2665 struct obstack
*obstack
)
2667 if (SYMBOL_DEMANGLED_NAME (symbol
) != NULL
)
2669 /* Try to figure out the appropriate namespace from the
2672 /* FIXME: carlton/2003-04-15: If the function in question is
2673 a method of a class, the name will actually include the
2674 name of the class as well. This should be harmless, but
2675 is a little unfortunate. */
2677 const char *name
= SYMBOL_DEMANGLED_NAME (symbol
);
2678 unsigned int prefix_len
= cp_entire_prefix_len (name
);
2680 block_set_scope (block
,
2681 obstack_copy0 (obstack
, name
, prefix_len
),
2686 /* This handles a single symbol from the symbol-file, building symbols
2687 into a GDB symtab. It takes these arguments and an implicit argument.
2689 TYPE is the type field of the ".stab" symbol entry.
2690 DESC is the desc field of the ".stab" entry.
2691 VALU is the value field of the ".stab" entry.
2692 NAME is the symbol name, in our address space.
2693 SECTION_OFFSETS is a set of amounts by which the sections of this
2694 object file were relocated when it was loaded into memory. Note
2695 that these section_offsets are not the objfile->section_offsets but
2696 the pst->section_offsets. All symbols that refer to memory
2697 locations need to be offset by these amounts.
2698 OBJFILE is the object file from which we are reading symbols. It
2699 is used in end_symtab. */
2702 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2703 const struct section_offsets
*section_offsets
,
2704 struct objfile
*objfile
)
2706 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2707 struct context_stack
*new;
2708 /* This remembers the address of the start of a function. It is
2709 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2710 are relative to the current function's start address. On systems
2711 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2712 and is used to relocate these symbol types rather than
2714 static CORE_ADDR function_start_offset
;
2716 /* This holds the address of the start of a function, without the
2717 system peculiarities of function_start_offset. */
2718 static CORE_ADDR last_function_start
;
2720 /* If this is nonzero, we've seen an N_SLINE since the start of the
2721 current function. We use this to tell us to move the first sline
2722 to the beginning of the function regardless of what its given
2724 static int sline_found_in_function
= 1;
2726 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2727 source file. Used to detect the SunPRO solaris compiler. */
2728 static int n_opt_found
;
2730 /* The stab type used for the definition of the last function.
2731 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2732 static int function_stab_type
= 0;
2734 if (!block_address_function_relative
)
2736 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2737 function start address, so just use the text offset. */
2738 function_start_offset
=
2739 ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2742 /* Something is wrong if we see real data before seeing a source
2745 if (get_last_source_file () == NULL
&& type
!= (unsigned char) N_SO
)
2747 /* Ignore any symbols which appear before an N_SO symbol.
2748 Currently no one puts symbols there, but we should deal
2749 gracefully with the case. A complain()t might be in order,
2750 but this should not be an error (). */
2759 if (*name
== '\000')
2761 /* This N_FUN marks the end of a function. This closes off
2762 the current block. */
2763 struct block
*block
;
2765 if (context_stack_depth
<= 0)
2767 lbrac_mismatch_complaint (symnum
);
2771 /* The following check is added before recording line 0 at
2772 end of function so as to handle hand-generated stabs
2773 which may have an N_FUN stabs at the end of the function,
2774 but no N_SLINE stabs. */
2775 if (sline_found_in_function
)
2777 CORE_ADDR addr
= last_function_start
+ valu
;
2779 record_line (current_subfile
, 0,
2780 gdbarch_addr_bits_remove (gdbarch
, addr
));
2783 within_function
= 0;
2784 new = pop_context ();
2786 /* Make a block for the local symbols within. */
2787 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
2788 new->start_addr
, new->start_addr
+ valu
,
2791 /* For C++, set the block's scope. */
2792 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
2793 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
);
2795 /* May be switching to an assembler file which may not be using
2796 block relative stabs, so reset the offset. */
2797 if (block_address_function_relative
)
2798 function_start_offset
= 0;
2803 sline_found_in_function
= 0;
2805 /* Relocate for dynamic loading. */
2806 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2807 valu
= gdbarch_addr_bits_remove (gdbarch
, valu
);
2808 last_function_start
= valu
;
2810 goto define_a_symbol
;
2813 /* This "symbol" just indicates the start of an inner lexical
2814 context within a function. */
2816 /* Ignore extra outermost context from SunPRO cc and acc. */
2817 if (n_opt_found
&& desc
== 1)
2820 if (block_address_function_relative
)
2821 /* Relocate for Sun ELF acc fn-relative syms. */
2822 valu
+= function_start_offset
;
2824 /* On most machines, the block addresses are relative to the
2825 N_SO, the linker did not relocate them (sigh). */
2826 valu
+= last_source_start_addr
;
2828 push_context (desc
, valu
);
2832 /* This "symbol" just indicates the end of an inner lexical
2833 context that was started with N_LBRAC. */
2835 /* Ignore extra outermost context from SunPRO cc and acc. */
2836 if (n_opt_found
&& desc
== 1)
2839 if (block_address_function_relative
)
2840 /* Relocate for Sun ELF acc fn-relative syms. */
2841 valu
+= function_start_offset
;
2843 /* On most machines, the block addresses are relative to the
2844 N_SO, the linker did not relocate them (sigh). */
2845 valu
+= last_source_start_addr
;
2847 if (context_stack_depth
<= 0)
2849 lbrac_mismatch_complaint (symnum
);
2853 new = pop_context ();
2854 if (desc
!= new->depth
)
2855 lbrac_mismatch_complaint (symnum
);
2857 if (local_symbols
!= NULL
)
2859 /* GCC development snapshots from March to December of
2860 2000 would output N_LSYM entries after N_LBRAC
2861 entries. As a consequence, these symbols are simply
2862 discarded. Complain if this is the case. */
2863 complaint (&symfile_complaints
,
2864 _("misplaced N_LBRAC entry; discarding local "
2865 "symbols which have no enclosing block"));
2867 local_symbols
= new->locals
;
2869 if (context_stack_depth
> 1)
2871 /* This is not the outermost LBRAC...RBRAC pair in the
2872 function, its local symbols preceded it, and are the ones
2873 just recovered from the context stack. Define the block
2874 for them (but don't bother if the block contains no
2875 symbols. Should we complain on blocks without symbols?
2876 I can't think of any useful purpose for them). */
2877 if (local_symbols
!= NULL
)
2879 /* Muzzle a compiler bug that makes end < start.
2881 ??? Which compilers? Is this ever harmful?. */
2882 if (new->start_addr
> valu
)
2884 complaint (&symfile_complaints
,
2885 _("block start larger than block end"));
2886 new->start_addr
= valu
;
2888 /* Make a block for the local symbols within. */
2889 finish_block (0, &local_symbols
, new->old_blocks
,
2890 new->start_addr
, valu
, objfile
);
2895 /* This is the outermost LBRAC...RBRAC pair. There is no
2896 need to do anything; leave the symbols that preceded it
2897 to be attached to the function's own block. We need to
2898 indicate that we just moved outside of the function. */
2899 within_function
= 0;
2906 /* This kind of symbol indicates the start of an object file.
2907 Relocate for dynamic loading. */
2908 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2912 /* This type of symbol indicates the start of data for one
2913 source file. Finish the symbol table of the previous source
2914 file (if any) and start accumulating a new symbol table.
2915 Relocate for dynamic loading. */
2916 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2920 if (get_last_source_file ())
2922 /* Check if previous symbol was also an N_SO (with some
2923 sanity checks). If so, that one was actually the
2924 directory name, and the current one is the real file
2925 name. Patch things up. */
2926 if (previous_stab_code
== (unsigned char) N_SO
)
2928 patch_subfile_names (current_subfile
, name
);
2929 break; /* Ignore repeated SOs. */
2931 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2935 /* Null name means this just marks the end of text for this .o
2936 file. Don't start a new symtab in this case. */
2937 if (*name
== '\000')
2940 if (block_address_function_relative
)
2941 function_start_offset
= 0;
2944 start_symtab (name
, NULL
, valu
);
2945 record_debugformat ("stabs");
2949 /* This type of symbol indicates the start of data for a
2950 sub-source-file, one whose contents were copied or included
2951 in the compilation of the main source file (whose name was
2952 given in the N_SO symbol). Relocate for dynamic loading. */
2953 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2954 start_subfile (name
, current_subfile
->dirname
);
2959 add_new_header_file (name
, valu
);
2960 start_subfile (name
, current_subfile
->dirname
);
2964 start_subfile (pop_subfile (), current_subfile
->dirname
);
2968 add_old_header_file (name
, valu
);
2972 /* This type of "symbol" really just records one line-number --
2973 core-address correspondence. Enter it in the line list for
2974 this symbol table. */
2976 /* Relocate for dynamic loading and for ELF acc
2977 function-relative symbols. */
2978 valu
+= function_start_offset
;
2980 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
2981 middle of the prologue instead of right at the start of the
2982 function. To deal with this we record the address for the
2983 first N_SLINE stab to be the start of the function instead of
2984 the listed location. We really shouldn't to this. When
2985 compiling with optimization, this first N_SLINE stab might be
2986 optimized away. Other (non-GCC) compilers don't emit this
2987 stab at all. There is no real harm in having an extra
2988 numbered line, although it can be a bit annoying for the
2989 user. However, it totally screws up our testsuite.
2991 So for now, keep adjusting the address of the first N_SLINE
2992 stab, but only for code compiled with GCC. */
2994 if (within_function
&& sline_found_in_function
== 0)
2996 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
2997 last_function_start
: valu
;
2999 record_line (current_subfile
, desc
,
3000 gdbarch_addr_bits_remove (gdbarch
, addr
));
3001 sline_found_in_function
= 1;
3004 record_line (current_subfile
, desc
,
3005 gdbarch_addr_bits_remove (gdbarch
, valu
));
3009 common_block_start (name
, objfile
);
3013 common_block_end (objfile
);
3016 /* The following symbol types need to have the appropriate
3017 offset added to their value; then we process symbol
3018 definitions in the name. */
3020 case N_STSYM
: /* Static symbol in data segment. */
3021 case N_LCSYM
: /* Static symbol in BSS segment. */
3022 case N_ROSYM
: /* Static symbol in read-only data segment. */
3023 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3024 Solaris 2's stabs-in-elf makes *most* symbols relative but
3025 leaves a few absolute (at least for Solaris 2.1 and version
3026 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3027 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3028 relocates it) .stab "foo:V...",N_STSYM is relative (section
3029 base subtracted). This leaves us no choice but to search for
3030 the 'S' or 'V'... (or pass the whole section_offsets stuff
3031 down ONE MORE function call level, which we really don't want
3036 /* Normal object file and NLMs have non-zero text seg offsets,
3037 but don't need their static syms offset in this fashion.
3038 XXX - This is really a crock that should be fixed in the
3039 solib handling code so that I don't have to work around it
3042 if (!symfile_relocatable
)
3044 p
= strchr (name
, ':');
3045 if (p
!= 0 && p
[1] == 'S')
3047 /* The linker relocated it. We don't want to add an
3048 elfstab_offset_sections-type offset, but we *do*
3049 want to add whatever solib.c passed to
3050 symbol_file_add as addr (this is known to affect
3051 SunOS 4, and I suspect ELF too). Since
3052 elfstab_offset_sections currently does not muck
3053 with the text offset (there is no Ttext.text
3054 symbol), we can get addr from the text offset. If
3055 elfstab_offset_sections ever starts dealing with
3056 the text offset, and we still need to do this, we
3057 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3058 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3059 goto define_a_symbol
;
3062 /* Since it's not the kludge case, re-dispatch to the right
3073 internal_error (__FILE__
, __LINE__
,
3074 _("failed internal consistency check"));
3078 case_N_STSYM
: /* Static symbol in data segment. */
3079 case N_DSLINE
: /* Source line number, data segment. */
3080 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3081 goto define_a_symbol
;
3083 case_N_LCSYM
: /* Static symbol in BSS segment. */
3084 case N_BSLINE
: /* Source line number, BSS segment. */
3085 /* N_BROWS: overlaps with N_BSLINE. */
3086 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3087 goto define_a_symbol
;
3089 case_N_ROSYM
: /* Static symbol in read-only data segment. */
3090 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3091 goto define_a_symbol
;
3093 case N_ENTRY
: /* Alternate entry point. */
3094 /* Relocate for dynamic loading. */
3095 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3096 goto define_a_symbol
;
3098 /* The following symbol types we don't know how to process.
3099 Handle them in a "default" way, but complain to people who
3102 case N_CATCH
: /* Exception handler catcher. */
3103 case N_EHDECL
: /* Exception handler name. */
3104 case N_PC
: /* Global symbol in Pascal. */
3105 case N_M2C
: /* Modula-2 compilation unit. */
3106 /* N_MOD2: overlaps with N_EHDECL. */
3107 case N_SCOPE
: /* Modula-2 scope information. */
3108 case N_ECOML
: /* End common (local name). */
3109 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3114 unknown_symtype_complaint (hex_string (type
));
3117 /* The following symbol types don't need the address field
3118 relocated, since it is either unused, or is absolute. */
3120 case N_GSYM
: /* Global variable. */
3121 case N_NSYMS
: /* Number of symbols (Ultrix). */
3122 case N_NOMAP
: /* No map? (Ultrix). */
3123 case N_RSYM
: /* Register variable. */
3124 case N_DEFD
: /* Modula-2 GNU module dependency. */
3125 case N_SSYM
: /* Struct or union element. */
3126 case N_LSYM
: /* Local symbol in stack. */
3127 case N_PSYM
: /* Parameter variable. */
3128 case N_LENG
: /* Length of preceding symbol type. */
3132 char *colon_pos
= strchr (name
, ':');
3134 if (colon_pos
== NULL
)
3137 deftype
= colon_pos
[1];
3143 function_stab_type
= type
;
3145 /* Deal with the SunPRO 3.0 compiler which omits the
3146 address from N_FUN symbols. */
3148 && valu
== ANOFFSET (section_offsets
,
3149 SECT_OFF_TEXT (objfile
))
3150 && gdbarch_sofun_address_maybe_missing (gdbarch
))
3152 CORE_ADDR minsym_valu
=
3153 find_stab_function_addr (name
, get_last_source_file (),
3156 /* The function find_stab_function_addr will return
3157 0 if the minimal symbol wasn't found.
3158 (Unfortunately, this might also be a valid
3159 address.) Anyway, if it *does* return 0, it is
3160 likely that the value was set correctly to begin
3162 if (minsym_valu
!= 0)
3166 if (block_address_function_relative
)
3167 /* For Solaris 2 compilers, the block addresses and
3168 N_SLINE's are relative to the start of the
3169 function. On normal systems, and when using GCC on
3170 Solaris 2, these addresses are just absolute, or
3171 relative to the N_SO, depending on
3172 BLOCK_ADDRESS_ABSOLUTE. */
3173 function_start_offset
= valu
;
3175 within_function
= 1;
3177 if (context_stack_depth
> 1)
3179 complaint (&symfile_complaints
,
3180 _("unmatched N_LBRAC before symtab pos %d"),
3185 if (context_stack_depth
> 0)
3187 struct block
*block
;
3189 new = pop_context ();
3190 /* Make a block for the local symbols within. */
3191 block
= finish_block (new->name
, &local_symbols
,
3192 new->old_blocks
, new->start_addr
,
3195 /* For C++, set the block's scope. */
3196 if (SYMBOL_LANGUAGE (new->name
) == language_cplus
)
3197 cp_set_block_scope (new->name
, block
,
3198 &objfile
->objfile_obstack
);
3201 new = push_context (0, valu
);
3202 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3206 define_symbol (valu
, name
, desc
, type
, objfile
);
3212 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3213 for a bunch of other flags, too. Someday we may parse their
3214 flags; for now we ignore theirs and hope they'll ignore ours. */
3215 case N_OPT
: /* Solaris 2: Compiler options. */
3218 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3220 processing_gcc_compilation
= 2;
3227 case N_MAIN
: /* Name of main routine. */
3228 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3229 it with a symbol file with "main" and without N_MAIN. I'm
3230 not sure exactly what rule to follow but probably something
3231 like: N_MAIN takes precedence over "main" no matter what
3232 objfile it is in; If there is more than one N_MAIN, choose
3233 the one in the symfile_objfile; If there is more than one
3234 N_MAIN within a given objfile, complain() and choose
3235 arbitrarily. (kingdon) */
3237 set_objfile_main_name (objfile
, name
, language_unknown
);
3240 /* The following symbol types can be ignored. */
3241 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3242 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3243 /* N_UNDF: Solaris 2: File separator mark. */
3244 /* N_UNDF: -- we will never encounter it, since we only process
3245 one file's symbols at once. */
3246 case N_ENDM
: /* Solaris 2: End of module. */
3247 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3251 /* '#' is a GNU C extension to allow one symbol to refer to another
3254 Generally this is used so that an alias can refer to its main
3259 /* Initialize symbol reference names and determine if this is a
3260 definition. If a symbol reference is being defined, go ahead
3261 and add it. Otherwise, just return. */
3266 /* If this stab defines a new reference ID that is not on the
3267 reference list, then put it on the reference list.
3269 We go ahead and advance NAME past the reference, even though
3270 it is not strictly necessary at this time. */
3271 refnum
= symbol_reference_defined (&s
);
3273 if (!ref_search (refnum
))
3274 ref_add (refnum
, 0, name
, valu
);
3278 previous_stab_code
= type
;
3281 /* FIXME: The only difference between this and elfstab_build_psymtabs
3282 is the call to install_minimal_symbols for elf, and the support for
3283 split sections. If the differences are really that small, the code
3284 should be shared. */
3286 /* Scan and build partial symbols for an coff symbol file.
3287 The coff file has already been processed to get its minimal symbols.
3289 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3292 OBJFILE is the object file we are reading symbols from.
3293 ADDR is the address relative to which the symbols are (e.g.
3294 the base address of the text segment).
3295 TEXTADDR is the address of the text section.
3296 TEXTSIZE is the size of the text section.
3297 STABSECTS is the list of .stab sections in OBJFILE.
3298 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3299 .stabstr section exists.
3301 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3302 adjusted for coff details. */
3305 coffstab_build_psymtabs (struct objfile
*objfile
,
3306 CORE_ADDR textaddr
, unsigned int textsize
,
3307 struct stab_section_list
*stabsects
,
3308 file_ptr stabstroffset
, unsigned int stabstrsize
)
3311 bfd
*sym_bfd
= objfile
->obfd
;
3312 char *name
= bfd_get_filename (sym_bfd
);
3313 struct dbx_symfile_info
*info
;
3314 unsigned int stabsize
;
3316 /* There is already a dbx_symfile_info allocated by our caller.
3317 It might even contain some info from the coff symtab to help us. */
3318 info
= DBX_SYMFILE_INFO (objfile
);
3320 DBX_TEXT_ADDR (objfile
) = textaddr
;
3321 DBX_TEXT_SIZE (objfile
) = textsize
;
3323 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3324 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3325 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3327 if (stabstrsize
> bfd_get_size (sym_bfd
))
3328 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3329 DBX_STRINGTAB (objfile
) = (char *)
3330 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3331 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3333 /* Now read in the string table in one big gulp. */
3335 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3337 perror_with_name (name
);
3338 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3339 if (val
!= stabstrsize
)
3340 perror_with_name (name
);
3342 stabsread_new_init ();
3343 buildsym_new_init ();
3344 free_header_files ();
3345 init_header_files ();
3347 processing_acc_compilation
= 1;
3349 /* In a coff file, we've already installed the minimal symbols that came
3350 from the coff (non-stab) symbol table, so always act like an
3351 incremental load here. */
3352 if (stabsects
->next
== NULL
)
3354 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3355 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3356 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3360 struct stab_section_list
*stabsect
;
3362 DBX_SYMCOUNT (objfile
) = 0;
3363 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3365 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3366 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3369 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3371 symbuf_sections
= stabsects
->next
;
3372 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3376 dbx_symfile_read (objfile
, 0);
3379 /* Scan and build partial symbols for an ELF symbol file.
3380 This ELF file has already been processed to get its minimal symbols.
3382 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3385 OBJFILE is the object file we are reading symbols from.
3386 ADDR is the address relative to which the symbols are (e.g.
3387 the base address of the text segment).
3388 STABSECT is the BFD section information for the .stab section.
3389 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3390 .stabstr section exists.
3392 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3393 adjusted for elf details. */
3396 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
3397 file_ptr stabstroffset
, unsigned int stabstrsize
)
3400 bfd
*sym_bfd
= objfile
->obfd
;
3401 char *name
= bfd_get_filename (sym_bfd
);
3402 struct dbx_symfile_info
*info
;
3403 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
3405 /* There is already a dbx_symfile_info allocated by our caller.
3406 It might even contain some info from the ELF symtab to help us. */
3407 info
= DBX_SYMFILE_INFO (objfile
);
3409 /* Find the first and last text address. dbx_symfile_read seems to
3411 find_text_range (sym_bfd
, objfile
);
3413 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3414 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3415 DBX_SYMCOUNT (objfile
)
3416 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3417 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3418 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3419 DBX_STAB_SECTION (objfile
) = stabsect
;
3421 if (stabstrsize
> bfd_get_size (sym_bfd
))
3422 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3423 DBX_STRINGTAB (objfile
) = (char *)
3424 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3425 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3427 /* Now read in the string table in one big gulp. */
3429 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3431 perror_with_name (name
);
3432 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3433 if (val
!= stabstrsize
)
3434 perror_with_name (name
);
3436 stabsread_new_init ();
3437 buildsym_new_init ();
3438 free_header_files ();
3439 init_header_files ();
3441 processing_acc_compilation
= 1;
3444 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3445 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3447 make_cleanup (free_current_contents
, (void *) &stabs_data
);
3449 /* In an elf file, we've already installed the minimal symbols that came
3450 from the elf (non-stab) symbol table, so always act like an
3451 incremental load here. dbx_symfile_read should not generate any new
3452 minimal symbols, since we will have already read the ELF dynamic symbol
3453 table and normal symbol entries won't be in the ".stab" section; but in
3454 case it does, it will install them itself. */
3455 dbx_symfile_read (objfile
, 0);
3457 do_cleanups (back_to
);
3460 /* Scan and build partial symbols for a file with special sections for stabs
3461 and stabstrings. The file has already been processed to get its minimal
3462 symbols, and any other symbols that might be necessary to resolve GSYMs.
3464 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3467 OBJFILE is the object file we are reading symbols from.
3468 ADDR is the address relative to which the symbols are (e.g. the base address
3469 of the text segment).
3470 STAB_NAME is the name of the section that contains the stabs.
3471 STABSTR_NAME is the name of the section that contains the stab strings.
3473 This routine is mostly copied from dbx_symfile_init and
3474 dbx_symfile_read. */
3477 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3478 char *stabstr_name
, char *text_name
)
3481 bfd
*sym_bfd
= objfile
->obfd
;
3482 char *name
= bfd_get_filename (sym_bfd
);
3484 asection
*stabstrsect
;
3485 asection
*text_sect
;
3486 struct dbx_symfile_info
*dbx
;
3488 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3489 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3495 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3496 "but not string section (%s)"),
3497 stab_name
, stabstr_name
);
3499 dbx
= XCNEW (struct dbx_symfile_info
);
3500 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
3502 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3504 error (_("Can't find %s section in symbol file"), text_name
);
3505 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3506 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3508 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3509 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3510 / DBX_SYMBOL_SIZE (objfile
);
3511 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3512 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING
3516 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3517 error (_("ridiculous string table size: %d bytes"),
3518 DBX_STRINGTAB_SIZE (objfile
));
3519 DBX_STRINGTAB (objfile
) = (char *)
3520 obstack_alloc (&objfile
->objfile_obstack
,
3521 DBX_STRINGTAB_SIZE (objfile
) + 1);
3522 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3524 /* Now read in the string table in one big gulp. */
3526 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3527 stabstrsect
, /* bfd section */
3528 DBX_STRINGTAB (objfile
), /* input buffer */
3529 0, /* offset into section */
3530 DBX_STRINGTAB_SIZE (objfile
)); /* amount to
3534 perror_with_name (name
);
3536 stabsread_new_init ();
3537 buildsym_new_init ();
3538 free_header_files ();
3539 init_header_files ();
3541 /* Now, do an incremental load. */
3543 processing_acc_compilation
= 1;
3544 dbx_symfile_read (objfile
, 0);
3547 static const struct sym_fns aout_sym_fns
=
3549 dbx_new_init
, /* init anything gbl to entire symtab */
3550 dbx_symfile_init
, /* read initial info, setup for sym_read() */
3551 dbx_symfile_read
, /* read a symbol file into symtab */
3552 NULL
, /* sym_read_psymbols */
3553 dbx_symfile_finish
, /* finished with file, cleanup */
3554 default_symfile_offsets
, /* parse user's offsets to internal form */
3555 default_symfile_segments
, /* Get segment information from a file. */
3557 default_symfile_relocate
, /* Relocate a debug section. */
3558 NULL
, /* sym_probe_fns */
3563 _initialize_dbxread (void)
3565 add_symtab_fns (bfd_target_aout_flavour
, &aout_sym_fns
);
3567 dbx_objfile_data_key
3568 = register_objfile_data_with_cleanup (NULL
, dbx_free_symfile_info
);