1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2016 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* This module provides three functions: dbx_symfile_init,
20 which initializes to read a symbol file; dbx_new_init, which
21 discards existing cached information when all symbols are being
22 discarded; and dbx_symfile_read, which reads a symbol table
25 dbx_symfile_read only does the minimum work necessary for letting the
26 user "name" things symbolically; it does not read the entire symtab.
27 Instead, it reads the external and static symbols and puts them in partial
28 symbol tables. When more extensive information is requested of a
29 file, the corresponding partial symbol table is mutated into a full
30 fledged symbol table by going back and reading the symbols
31 for real. dbx_psymtab_to_symtab() is the function that does this */
34 #if defined(__CYGNUSCLIB__)
35 #include <sys/types.h>
39 #include "gdb_obstack.h"
42 #include "breakpoint.h"
44 #include "gdbcore.h" /* for bfd stuff */
45 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
46 #include "filenames.h"
49 #include "stabsread.h"
50 #include "gdb-stabs.h"
52 #include "complaints.h"
54 #include "cp-support.h"
58 #include "aout/aout64.h"
59 #include "aout/stab_gnu.h" /* We always use GNU stabs, not
63 /* Key for dbx-associated data. */
65 const struct objfile_data
*dbx_objfile_data_key
;
67 /* We put a pointer to this structure in the read_symtab_private field
72 /* Offset within the file symbol table of first local symbol for this
77 /* Length (in bytes) of the section of the symbol table devoted to
78 this file's symbols (actually, the section bracketed may contain
79 more than just this file's symbols). If ldsymlen is 0, the only
80 reason for this thing's existence is the dependency list. Nothing
81 else will happen when it is read in. */
85 /* The size of each symbol in the symbol file (in external form). */
89 /* Further information needed to locate the symbols if they are in
94 int file_string_offset
;
97 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
98 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
99 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
100 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
101 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
102 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
103 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
106 /* The objfile we are currently reading. */
108 static struct objfile
*dbxread_objfile
;
110 /* Remember what we deduced to be the source language of this psymtab. */
112 static enum language psymtab_language
= language_unknown
;
114 /* The BFD for this file -- implicit parameter to next_symbol_text. */
116 static bfd
*symfile_bfd
;
118 /* The size of each symbol in the symbol file (in external form).
119 This is set by dbx_symfile_read when building psymtabs, and by
120 dbx_psymtab_to_symtab when building symtabs. */
122 static unsigned symbol_size
;
124 /* This is the offset of the symbol table in the executable file. */
126 static unsigned symbol_table_offset
;
128 /* This is the offset of the string table in the executable file. */
130 static unsigned string_table_offset
;
132 /* For elf+stab executables, the n_strx field is not a simple index
133 into the string table. Instead, each .o file has a base offset in
134 the string table, and the associated symbols contain offsets from
135 this base. The following two variables contain the base offset for
136 the current and next .o files. */
138 static unsigned int file_string_table_offset
;
139 static unsigned int next_file_string_table_offset
;
141 /* .o and NLM files contain unrelocated addresses which are based at
142 0. When non-zero, this flag disables some of the special cases for
143 Solaris elf+stab text addresses at location 0. */
145 static int symfile_relocatable
= 0;
147 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
148 relative to the function start address. */
150 static int block_address_function_relative
= 0;
152 /* The lowest text address we have yet encountered. This is needed
153 because in an a.out file, there is no header field which tells us
154 what address the program is actually going to be loaded at, so we
155 need to make guesses based on the symbols (which *are* relocated to
156 reflect the address it will be loaded at). */
158 static CORE_ADDR lowest_text_address
;
160 /* Non-zero if there is any line number info in the objfile. Prevents
161 dbx_end_psymtab from discarding an otherwise empty psymtab. */
163 static int has_line_numbers
;
165 /* Complaints about the symbols we have encountered. */
168 unknown_symtype_complaint (const char *arg1
)
170 complaint (&symfile_complaints
, _("unknown symbol type %s"), arg1
);
174 lbrac_mismatch_complaint (int arg1
)
176 complaint (&symfile_complaints
,
177 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1
);
181 repeated_header_complaint (const char *arg1
, int arg2
)
183 complaint (&symfile_complaints
,
184 _("\"repeated\" header file %s not "
185 "previously seen, at symtab pos %d"),
189 /* find_text_range --- find start and end of loadable code sections
191 The find_text_range function finds the shortest address range that
192 encloses all sections containing executable code, and stores it in
193 objfile's text_addr and text_size members.
195 dbx_symfile_read will use this to finish off the partial symbol
196 table, in some cases. */
199 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
206 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
207 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
209 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
210 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
214 if (sec_start
< start
)
229 error (_("Can't find any code sections in symbol file"));
231 DBX_TEXT_ADDR (objfile
) = start
;
232 DBX_TEXT_SIZE (objfile
) = end
- start
;
237 /* During initial symbol readin, we need to have a structure to keep
238 track of which psymtabs have which bincls in them. This structure
239 is used during readin to setup the list of dependencies within each
240 partial symbol table. */
242 struct header_file_location
244 char *name
; /* Name of header file */
245 int instance
; /* See above */
246 struct partial_symtab
*pst
; /* Partial symtab that has the
247 BINCL/EINCL defs for this file. */
250 /* The actual list and controling variables. */
251 static struct header_file_location
*bincl_list
, *next_bincl
;
252 static int bincls_allocated
;
254 /* Local function prototypes. */
256 extern void _initialize_dbxread (void);
258 static void read_ofile_symtab (struct objfile
*, struct partial_symtab
*);
260 static void dbx_read_symtab (struct partial_symtab
*self
,
261 struct objfile
*objfile
);
263 static void dbx_psymtab_to_symtab_1 (struct objfile
*, struct partial_symtab
*);
265 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
267 static void read_dbx_symtab (struct objfile
*);
269 static void free_bincl_list (struct objfile
*);
271 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
273 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
275 static void init_bincl_list (int, struct objfile
*);
277 static char *dbx_next_symbol_text (struct objfile
*);
279 static void fill_symbuf (bfd
*);
281 static void dbx_symfile_init (struct objfile
*);
283 static void dbx_new_init (struct objfile
*);
285 static void dbx_symfile_read (struct objfile
*, int);
287 static void dbx_symfile_finish (struct objfile
*);
289 static void record_minimal_symbol (const char *, CORE_ADDR
, int,
292 static void add_new_header_file (char *, int);
294 static void add_old_header_file (char *, int);
296 static void add_this_object_header_file (int);
298 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
300 struct partial_symbol
**,
301 struct partial_symbol
**);
303 /* Free up old header file tables. */
306 free_header_files (void)
308 if (this_object_header_files
)
310 xfree (this_object_header_files
);
311 this_object_header_files
= NULL
;
313 n_allocated_this_object_header_files
= 0;
316 /* Allocate new header file tables. */
319 init_header_files (void)
321 n_allocated_this_object_header_files
= 10;
322 this_object_header_files
= XNEWVEC (int, 10);
325 /* Add header file number I for this object file
326 at the next successive FILENUM. */
329 add_this_object_header_file (int i
)
331 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
333 n_allocated_this_object_header_files
*= 2;
334 this_object_header_files
335 = (int *) xrealloc ((char *) this_object_header_files
,
336 n_allocated_this_object_header_files
* sizeof (int));
339 this_object_header_files
[n_this_object_header_files
++] = i
;
342 /* Add to this file an "old" header file, one already seen in
343 a previous object file. NAME is the header file's name.
344 INSTANCE is its instance code, to select among multiple
345 symbol tables for the same header file. */
348 add_old_header_file (char *name
, int instance
)
350 struct header_file
*p
= HEADER_FILES (dbxread_objfile
);
353 for (i
= 0; i
< N_HEADER_FILES (dbxread_objfile
); i
++)
354 if (filename_cmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
356 add_this_object_header_file (i
);
359 repeated_header_complaint (name
, symnum
);
362 /* Add to this file a "new" header file: definitions for its types follow.
363 NAME is the header file's name.
364 Most often this happens only once for each distinct header file,
365 but not necessarily. If it happens more than once, INSTANCE has
366 a different value each time, and references to the header file
367 use INSTANCE values to select among them.
369 dbx output contains "begin" and "end" markers for each new header file,
370 but at this level we just need to know which files there have been;
371 so we record the file when its "begin" is seen and ignore the "end". */
374 add_new_header_file (char *name
, int instance
)
377 struct header_file
*hfile
;
379 /* Make sure there is room for one more header file. */
381 i
= N_ALLOCATED_HEADER_FILES (dbxread_objfile
);
383 if (N_HEADER_FILES (dbxread_objfile
) == i
)
387 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = 10;
388 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
389 xmalloc (10 * sizeof (struct header_file
));
394 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = i
;
395 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
396 xrealloc ((char *) HEADER_FILES (dbxread_objfile
),
397 (i
* sizeof (struct header_file
)));
401 /* Create an entry for this header file. */
403 i
= N_HEADER_FILES (dbxread_objfile
)++;
404 hfile
= HEADER_FILES (dbxread_objfile
) + i
;
405 hfile
->name
= xstrdup (name
);
406 hfile
->instance
= instance
;
408 hfile
->vector
= XCNEWVEC (struct type
*, 10);
410 add_this_object_header_file (i
);
414 static struct type
**
415 explicit_lookup_type (int real_filenum
, int index
)
417 struct header_file
*f
= &HEADER_FILES (dbxread_objfile
)[real_filenum
];
419 if (index
>= f
->length
)
422 f
->vector
= (struct type
**)
423 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
424 memset (&f
->vector
[f
->length
/ 2],
425 '\0', f
->length
* sizeof (struct type
*) / 2);
427 return &f
->vector
[index
];
432 record_minimal_symbol (const char *name
, CORE_ADDR address
, int type
,
433 struct objfile
*objfile
)
435 enum minimal_symbol_type ms_type
;
442 section
= SECT_OFF_TEXT (objfile
);
446 section
= SECT_OFF_DATA (objfile
);
450 section
= SECT_OFF_BSS (objfile
);
459 section
= SECT_OFF_DATA (objfile
);
462 /* I don't think this type actually exists; since a N_SETV is the result
463 of going over many .o files, it doesn't make sense to have one
465 ms_type
= mst_file_data
;
466 section
= SECT_OFF_DATA (objfile
);
473 ms_type
= mst_file_text
;
474 section
= SECT_OFF_TEXT (objfile
);
477 ms_type
= mst_file_data
;
479 /* Check for __DYNAMIC, which is used by Sun shared libraries.
480 Record it as global even if it's local, not global, so
481 lookup_minimal_symbol can find it. We don't check symbol_leading_char
482 because for SunOS4 it always is '_'. */
483 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
486 /* Same with virtual function tables, both global and static. */
488 const char *tempstring
= name
;
490 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
492 if (is_vtable_name (tempstring
))
495 section
= SECT_OFF_DATA (objfile
);
498 ms_type
= mst_file_bss
;
499 section
= SECT_OFF_BSS (objfile
);
502 ms_type
= mst_unknown
;
507 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
508 && address
< lowest_text_address
)
509 lowest_text_address
= address
;
511 prim_record_minimal_symbol_and_info
512 (name
, address
, ms_type
, section
, objfile
);
515 /* Scan and build partial symbols for a symbol file.
516 We have been initialized by a call to dbx_symfile_init, which
517 put all the relevant info into a "struct dbx_symfile_info",
518 hung off the objfile structure. */
521 dbx_symfile_read (struct objfile
*objfile
, int symfile_flags
)
525 struct cleanup
*back_to
;
527 sym_bfd
= objfile
->obfd
;
529 /* .o and .nlm files are relocatables with text, data and bss segs based at
530 0. This flag disables special (Solaris stabs-in-elf only) fixups for
531 symbols with a value of 0. */
533 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
535 /* This is true for Solaris (and all other systems which put stabs
536 in sections, hopefully, since it would be silly to do things
537 differently from Solaris), and false for SunOS4 and other a.out
539 block_address_function_relative
=
540 ((startswith (bfd_get_target (sym_bfd
), "elf"))
541 || (startswith (bfd_get_target (sym_bfd
), "som"))
542 || (startswith (bfd_get_target (sym_bfd
), "coff"))
543 || (startswith (bfd_get_target (sym_bfd
), "pe"))
544 || (startswith (bfd_get_target (sym_bfd
), "epoc-pe"))
545 || (startswith (bfd_get_target (sym_bfd
), "nlm")));
547 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
549 perror_with_name (objfile_name (objfile
));
551 /* Size the symbol table. */
552 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
553 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
555 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
556 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
558 free_pending_blocks ();
559 back_to
= make_cleanup (really_free_pendings
, 0);
561 minimal_symbol_reader reader
;
563 /* Read stabs data from executable file and define symbols. */
565 read_dbx_symtab (objfile
);
567 /* Add the dynamic symbols. */
569 read_dbx_dynamic_symtab (objfile
);
571 /* Install any minimal symbols that have been collected as the current
572 minimal symbols for this objfile. */
574 reader
.install (objfile
);
576 do_cleanups (back_to
);
579 /* Initialize anything that needs initializing when a completely new
580 symbol file is specified (not just adding some symbols from another
581 file, e.g. a shared library). */
584 dbx_new_init (struct objfile
*ignore
)
586 stabsread_new_init ();
587 buildsym_new_init ();
588 init_header_files ();
592 /* dbx_symfile_init ()
593 is the dbx-specific initialization routine for reading symbols.
594 It is passed a struct objfile which contains, among other things,
595 the BFD for the file whose symbols are being read, and a slot for a pointer
596 to "private data" which we fill with goodies.
598 We read the string table into malloc'd space and stash a pointer to it.
600 Since BFD doesn't know how to read debug symbols in a format-independent
601 way (and may never do so...), we have to do it ourselves. We will never
602 be called unless this is an a.out (or very similar) file.
603 FIXME, there should be a cleaner peephole into the BFD environment here. */
605 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
608 dbx_symfile_init (struct objfile
*objfile
)
611 bfd
*sym_bfd
= objfile
->obfd
;
612 char *name
= bfd_get_filename (sym_bfd
);
614 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
615 struct dbx_symfile_info
*dbx
;
617 /* Allocate struct to keep track of the symfile. */
618 dbx
= XCNEW (struct dbx_symfile_info
);
619 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
621 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
622 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
623 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
625 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
626 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
627 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
629 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
631 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
633 error (_("Can't find .text section in symbol file"));
634 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
635 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
637 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
638 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
639 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
641 /* Read the string table and stash it away in the objfile_obstack.
642 When we blow away the objfile the string table goes away as well.
643 Note that gdb used to use the results of attempting to malloc the
644 string table, based on the size it read, as a form of sanity check
645 for botched byte swapping, on the theory that a byte swapped string
646 table size would be so totally bogus that the malloc would fail. Now
647 that we put in on the objfile_obstack, we can't do this since gdb gets
648 a fatal error (out of virtual memory) if the size is bogus. We can
649 however at least check to see if the size is less than the size of
650 the size field itself, or larger than the size of the entire file.
651 Note that all valid string tables have a size greater than zero, since
652 the bytes used to hold the size are included in the count. */
654 if (STRING_TABLE_OFFSET
== 0)
656 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
657 will never be zero, even when there is no string table. This
658 would appear to be a bug in bfd. */
659 DBX_STRINGTAB_SIZE (objfile
) = 0;
660 DBX_STRINGTAB (objfile
) = NULL
;
664 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
666 perror_with_name (name
);
668 memset (size_temp
, 0, sizeof (size_temp
));
669 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
672 perror_with_name (name
);
676 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
677 EOF if there is no string table, and attempting to read the size
678 from EOF will read zero bytes. */
679 DBX_STRINGTAB_SIZE (objfile
) = 0;
680 DBX_STRINGTAB (objfile
) = NULL
;
684 /* Read some data that would appear to be the string table size.
685 If there really is a string table, then it is probably the right
686 size. Byteswap if necessary and validate the size. Note that
687 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
688 random data that happened to be at STRING_TABLE_OFFSET, because
689 bfd can't tell us there is no string table, the sanity checks may
690 or may not catch this. */
691 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
693 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
694 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
695 error (_("ridiculous string table size (%d bytes)."),
696 DBX_STRINGTAB_SIZE (objfile
));
698 DBX_STRINGTAB (objfile
) =
699 (char *) obstack_alloc (&objfile
->objfile_obstack
,
700 DBX_STRINGTAB_SIZE (objfile
));
701 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
703 /* Now read in the string table in one big gulp. */
705 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
707 perror_with_name (name
);
708 val
= bfd_bread (DBX_STRINGTAB (objfile
),
709 DBX_STRINGTAB_SIZE (objfile
),
711 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
712 perror_with_name (name
);
717 /* Perform any local cleanups required when we are done with a particular
718 objfile. I.E, we are in the process of discarding all symbol information
719 for an objfile, freeing up all memory held for it, and unlinking the
720 objfile struct from the global list of known objfiles. */
723 dbx_symfile_finish (struct objfile
*objfile
)
725 free_header_files ();
729 dbx_free_symfile_info (struct objfile
*objfile
, void *arg
)
731 struct dbx_symfile_info
*dbx
= (struct dbx_symfile_info
*) arg
;
733 if (dbx
->header_files
!= NULL
)
735 int i
= dbx
->n_header_files
;
736 struct header_file
*hfiles
= dbx
->header_files
;
740 xfree (hfiles
[i
].name
);
741 xfree (hfiles
[i
].vector
);
751 /* Buffer for reading the symbol table entries. */
752 static struct external_nlist symbuf
[4096];
753 static int symbuf_idx
;
754 static int symbuf_end
;
756 /* Name of last function encountered. Used in Solaris to approximate
757 object file boundaries. */
758 static char *last_function_name
;
760 /* The address in memory of the string table of the object file we are
761 reading (which might not be the "main" object file, but might be a
762 shared library or some other dynamically loaded thing). This is
763 set by read_dbx_symtab when building psymtabs, and by
764 read_ofile_symtab when building symtabs, and is used only by
765 next_symbol_text. FIXME: If that is true, we don't need it when
766 building psymtabs, right? */
767 static char *stringtab_global
;
769 /* These variables are used to control fill_symbuf when the stabs
770 symbols are not contiguous (as may be the case when a COFF file is
771 linked using --split-by-reloc). */
772 static struct stab_section_list
*symbuf_sections
;
773 static unsigned int symbuf_left
;
774 static unsigned int symbuf_read
;
776 /* This variable stores a global stabs buffer, if we read stabs into
777 memory in one chunk in order to process relocations. */
778 static bfd_byte
*stabs_data
;
780 /* Refill the symbol table input buffer
781 and set the variables that control fetching entries from it.
782 Reports an error if no data available.
783 This function can read past the end of the symbol table
784 (into the string table) but this does no harm. */
787 fill_symbuf (bfd
*sym_bfd
)
794 nbytes
= sizeof (symbuf
);
795 if (nbytes
> symbuf_left
)
796 nbytes
= symbuf_left
;
797 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
799 else if (symbuf_sections
== NULL
)
801 count
= sizeof (symbuf
);
802 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
806 if (symbuf_left
<= 0)
808 file_ptr filepos
= symbuf_sections
->section
->filepos
;
810 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
811 perror_with_name (bfd_get_filename (sym_bfd
));
812 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
813 symbol_table_offset
= filepos
- symbuf_read
;
814 symbuf_sections
= symbuf_sections
->next
;
818 if (count
> sizeof (symbuf
))
819 count
= sizeof (symbuf
);
820 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
824 perror_with_name (bfd_get_filename (sym_bfd
));
825 else if (nbytes
== 0)
826 error (_("Premature end of file reading symbol table"));
827 symbuf_end
= nbytes
/ symbol_size
;
829 symbuf_left
-= nbytes
;
830 symbuf_read
+= nbytes
;
834 stabs_seek (int sym_offset
)
838 symbuf_read
+= sym_offset
;
839 symbuf_left
-= sym_offset
;
842 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
845 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
847 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
848 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
849 (intern).n_other = 0; \
850 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
851 if (bfd_get_sign_extend_vma (abfd)) \
852 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
854 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
857 /* Invariant: The symbol pointed to by symbuf_idx is the first one
858 that hasn't been swapped. Swap the symbol at the same time
859 that symbuf_idx is incremented. */
861 /* dbx allows the text of a symbol name to be continued into the
862 next symbol name! When such a continuation is encountered
863 (a \ at the end of the text of a name)
864 call this function to get the continuation. */
867 dbx_next_symbol_text (struct objfile
*objfile
)
869 struct internal_nlist nlist
;
871 if (symbuf_idx
== symbuf_end
)
872 fill_symbuf (symfile_bfd
);
875 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
876 OBJSTAT (objfile
, n_stabs
++);
880 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
883 /* Initialize the list of bincls to contain none and have some
887 init_bincl_list (int number
, struct objfile
*objfile
)
889 bincls_allocated
= number
;
890 next_bincl
= bincl_list
= XNEWVEC (struct header_file_location
,
894 /* Add a bincl to the list. */
897 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
899 if (next_bincl
>= bincl_list
+ bincls_allocated
)
901 int offset
= next_bincl
- bincl_list
;
903 bincls_allocated
*= 2;
904 bincl_list
= (struct header_file_location
*)
905 xrealloc ((char *) bincl_list
,
906 bincls_allocated
* sizeof (struct header_file_location
));
907 next_bincl
= bincl_list
+ offset
;
909 next_bincl
->pst
= pst
;
910 next_bincl
->instance
= instance
;
911 next_bincl
++->name
= name
;
914 /* Given a name, value pair, find the corresponding
915 bincl in the list. Return the partial symtab associated
916 with that header_file_location. */
918 static struct partial_symtab
*
919 find_corresponding_bincl_psymtab (char *name
, int instance
)
921 struct header_file_location
*bincl
;
923 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
924 if (bincl
->instance
== instance
925 && strcmp (name
, bincl
->name
) == 0)
928 repeated_header_complaint (name
, symnum
);
929 return (struct partial_symtab
*) 0;
932 /* Free the storage allocated for the bincl list. */
935 free_bincl_list (struct objfile
*objfile
)
938 bincls_allocated
= 0;
942 do_free_bincl_list_cleanup (void *objfile
)
944 free_bincl_list ((struct objfile
*) objfile
);
947 static struct cleanup
*
948 make_cleanup_free_bincl_list (struct objfile
*objfile
)
950 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
953 /* Set namestring based on nlist. If the string table index is invalid,
954 give a fake name, and print a single error message per symbol file read,
955 rather than abort the symbol reading or flood the user with messages. */
958 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
962 if (nlist
->n_strx
+ file_string_table_offset
963 >= DBX_STRINGTAB_SIZE (objfile
)
964 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
966 complaint (&symfile_complaints
,
967 _("bad string table offset in symbol %d"),
969 namestring
= "<bad string table offset>";
972 namestring
= (nlist
->n_strx
+ file_string_table_offset
973 + DBX_STRINGTAB (objfile
));
977 /* Scan a SunOs dynamic symbol table for symbols of interest and
978 add them to the minimal symbol table. */
981 read_dbx_dynamic_symtab (struct objfile
*objfile
)
983 bfd
*abfd
= objfile
->obfd
;
984 struct cleanup
*back_to
;
997 /* Check that the symbol file has dynamic symbols that we know about.
998 bfd_arch_unknown can happen if we are reading a sun3 symbol file
999 on a sun4 host (and vice versa) and bfd is not configured
1000 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1001 so we ignore the dynamic symbols in this case. */
1002 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1003 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1004 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1007 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1008 if (dynsym_size
< 0)
1011 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1012 back_to
= make_cleanup (xfree
, dynsyms
);
1014 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1015 if (dynsym_count
< 0)
1017 do_cleanups (back_to
);
1021 /* Enter dynamic symbols into the minimal symbol table
1022 if this is a stripped executable. */
1023 if (bfd_get_symcount (abfd
) <= 0)
1026 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1028 asymbol
*sym
= *symptr
;
1032 sec
= bfd_get_section (sym
);
1034 /* BFD symbols are section relative. */
1035 sym_value
= sym
->value
+ sec
->vma
;
1037 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1041 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1045 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1052 if (sym
->flags
& BSF_GLOBAL
)
1055 record_minimal_symbol (bfd_asymbol_name (sym
), sym_value
,
1060 /* Symbols from shared libraries have a dynamic relocation entry
1061 that points to the associated slot in the procedure linkage table.
1062 We make a mininal symbol table entry with type mst_solib_trampoline
1063 at the address in the procedure linkage table. */
1064 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1065 if (dynrel_size
< 0)
1067 do_cleanups (back_to
);
1071 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1072 make_cleanup (xfree
, dynrels
);
1074 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1075 if (dynrel_count
< 0)
1077 do_cleanups (back_to
);
1081 for (counter
= 0, relptr
= dynrels
;
1082 counter
< dynrel_count
;
1083 counter
++, relptr
++)
1085 arelent
*rel
= *relptr
;
1086 CORE_ADDR address
= rel
->address
;
1088 switch (bfd_get_arch (abfd
))
1090 case bfd_arch_sparc
:
1091 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1095 /* `16' is the type BFD produces for a jump table relocation. */
1096 if (rel
->howto
->type
!= 16)
1099 /* Adjust address in the jump table to point to
1100 the start of the bsr instruction. */
1107 name
= bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1108 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1112 do_cleanups (back_to
);
1116 find_stab_function_addr (char *namestring
, const char *filename
,
1117 struct objfile
*objfile
)
1119 struct bound_minimal_symbol msym
;
1123 p
= strchr (namestring
, ':');
1127 p
= (char *) alloca (n
+ 2);
1128 strncpy (p
, namestring
, n
);
1131 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1132 if (msym
.minsym
== NULL
)
1134 /* Sun Fortran appends an underscore to the minimal symbol name,
1135 try again with an appended underscore if the minimal symbol
1139 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1142 if (msym
.minsym
== NULL
&& filename
!= NULL
)
1144 /* Try again without the filename. */
1146 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1148 if (msym
.minsym
== NULL
&& filename
!= NULL
)
1150 /* And try again for Sun Fortran, but without the filename. */
1153 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1156 return msym
.minsym
== NULL
? 0 : BMSYMBOL_VALUE_ADDRESS (msym
);
1160 function_outside_compilation_unit_complaint (const char *arg1
)
1162 complaint (&symfile_complaints
,
1163 _("function `%s' appears to be defined "
1164 "outside of all compilation units"),
1168 /* Setup partial_symtab's describing each source file for which
1169 debugging information is available. */
1172 read_dbx_symtab (struct objfile
*objfile
)
1174 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1175 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
1176 struct internal_nlist nlist
;
1177 CORE_ADDR text_addr
;
1184 int past_first_source_file
= 0;
1185 CORE_ADDR last_function_start
= 0;
1186 struct cleanup
*back_to
;
1188 int textlow_not_set
;
1189 int data_sect_index
;
1191 /* Current partial symtab. */
1192 struct partial_symtab
*pst
;
1194 /* List of current psymtab's include files. */
1195 const char **psymtab_include_list
;
1196 int includes_allocated
;
1199 /* Index within current psymtab dependency list. */
1200 struct partial_symtab
**dependency_list
;
1201 int dependencies_used
, dependencies_allocated
;
1203 text_addr
= DBX_TEXT_ADDR (objfile
);
1204 text_size
= DBX_TEXT_SIZE (objfile
);
1206 /* FIXME. We probably want to change stringtab_global rather than add this
1207 while processing every symbol entry. FIXME. */
1208 file_string_table_offset
= 0;
1209 next_file_string_table_offset
= 0;
1211 stringtab_global
= DBX_STRINGTAB (objfile
);
1213 pst
= (struct partial_symtab
*) 0;
1215 includes_allocated
= 30;
1217 psymtab_include_list
= (const char **) alloca (includes_allocated
*
1218 sizeof (const char *));
1220 dependencies_allocated
= 30;
1221 dependencies_used
= 0;
1223 (struct partial_symtab
**) alloca (dependencies_allocated
*
1224 sizeof (struct partial_symtab
*));
1226 /* Init bincl list */
1227 init_bincl_list (20, objfile
);
1228 back_to
= make_cleanup_free_bincl_list (objfile
);
1230 set_last_source_file (NULL
);
1232 lowest_text_address
= (CORE_ADDR
) -1;
1234 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1235 abfd
= objfile
->obfd
;
1236 symbuf_end
= symbuf_idx
= 0;
1237 next_symbol_text_func
= dbx_next_symbol_text
;
1238 textlow_not_set
= 1;
1239 has_line_numbers
= 0;
1241 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1242 to global and static variables. The stab for a global or static
1243 variable doesn't give us any indication of which section it's in,
1244 so we can't tell immediately which offset in
1245 objfile->section_offsets we should apply to the variable's
1248 We could certainly find out which section contains the variable
1249 by looking up the variable's unrelocated address with
1250 find_pc_section, but that would be expensive; this is the
1251 function that constructs the partial symbol tables by examining
1252 every symbol in the entire executable, and it's
1253 performance-critical. So that expense would not be welcome. I'm
1254 not sure what to do about this at the moment.
1256 What we have done for years is to simply assume that the .data
1257 section's offset is appropriate for all global and static
1258 variables. Recently, this was expanded to fall back to the .bss
1259 section's offset if there is no .data section, and then to the
1260 .rodata section's offset. */
1261 data_sect_index
= objfile
->sect_index_data
;
1262 if (data_sect_index
== -1)
1263 data_sect_index
= SECT_OFF_BSS (objfile
);
1264 if (data_sect_index
== -1)
1265 data_sect_index
= SECT_OFF_RODATA (objfile
);
1267 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1268 for the file to have no .data, no .bss, and no .text at all, if
1269 it also has no global or static variables. If it does, we will
1270 get an internal error from an ANOFFSET macro below when we try to
1271 use data_sect_index. */
1273 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1275 /* Get the symbol for this run and pull out some info. */
1276 QUIT
; /* Allow this to be interruptable. */
1277 if (symbuf_idx
== symbuf_end
)
1279 bufp
= &symbuf
[symbuf_idx
++];
1282 * Special case to speed up readin.
1284 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1286 has_line_numbers
= 1;
1290 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1291 OBJSTAT (objfile
, n_stabs
++);
1293 /* Ok. There is a lot of code duplicated in the rest of this
1294 switch statement (for efficiency reasons). Since I don't
1295 like duplicating code, I will do my penance here, and
1296 describe the code which is duplicated:
1298 *) The assignment to namestring.
1299 *) The call to strchr.
1300 *) The addition of a partial symbol the two partial
1301 symbol lists. This last is a large section of code, so
1302 I've imbedded it in the following macro. */
1304 switch (nlist
.n_type
)
1307 * Standard, external, non-debugger, symbols
1310 case N_TEXT
| N_EXT
:
1311 case N_NBTEXT
| N_EXT
:
1314 case N_DATA
| N_EXT
:
1315 case N_NBDATA
| N_EXT
:
1320 case N_NBBSS
| N_EXT
:
1321 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1326 namestring
= set_namestring (objfile
, &nlist
);
1328 record_minimal_symbol (namestring
, nlist
.n_value
,
1329 nlist
.n_type
, objfile
); /* Always */
1332 /* Standard, local, non-debugger, symbols. */
1336 /* We need to be able to deal with both N_FN or N_TEXT,
1337 because we have no way of knowing whether the sys-supplied ld
1338 or GNU ld was used to make the executable. Sequents throw
1339 in another wrinkle -- they renumbered N_FN. */
1344 namestring
= set_namestring (objfile
, &nlist
);
1346 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1347 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1348 && namestring
[nsl
- 2] == '.'))
1350 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1351 SECT_OFF_TEXT (objfile
));
1353 if (past_first_source_file
&& pst
1354 /* The gould NP1 uses low values for .o and -l symbols
1355 which are not the address. */
1356 && nlist
.n_value
>= pst
->textlow
)
1358 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
,
1359 includes_used
, symnum
* symbol_size
,
1360 nlist
.n_value
> pst
->texthigh
1361 ? nlist
.n_value
: pst
->texthigh
,
1362 dependency_list
, dependencies_used
,
1364 pst
= (struct partial_symtab
*) 0;
1366 dependencies_used
= 0;
1367 has_line_numbers
= 0;
1370 past_first_source_file
= 1;
1379 case N_UNDF
| N_EXT
:
1380 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1381 We used to rely on the target to tell us whether it knows
1382 where the symbol has been relocated to, but none of the
1383 target implementations actually provided that operation.
1384 So we just ignore the symbol, the same way we would do if
1385 we had a target-side symbol lookup which returned no match.
1387 All other symbols (with nlist.n_value == 0), are really
1388 undefined, and so we ignore them too. */
1392 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1394 /* Deal with relative offsets in the string table
1395 used in ELF+STAB under Solaris. If we want to use the
1396 n_strx field, which contains the name of the file,
1397 we must adjust file_string_table_offset *before* calling
1398 set_namestring(). */
1399 past_first_source_file
= 1;
1400 file_string_table_offset
= next_file_string_table_offset
;
1401 next_file_string_table_offset
=
1402 file_string_table_offset
+ nlist
.n_value
;
1403 if (next_file_string_table_offset
< file_string_table_offset
)
1404 error (_("string table offset backs up at %d"), symnum
);
1405 /* FIXME -- replace error() with complaint. */
1410 /* Lots of symbol types we can just ignore. */
1417 /* Keep going . . . */
1420 * Special symbol types for GNU
1423 case N_INDR
| N_EXT
:
1425 case N_SETA
| N_EXT
:
1427 case N_SETT
| N_EXT
:
1429 case N_SETD
| N_EXT
:
1431 case N_SETB
| N_EXT
:
1442 static int prev_so_symnum
= -10;
1443 static int first_so_symnum
;
1445 static char *dirname_nso
;
1446 int prev_textlow_not_set
;
1448 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1449 SECT_OFF_TEXT (objfile
));
1451 prev_textlow_not_set
= textlow_not_set
;
1453 /* A zero value is probably an indication for the SunPRO 3.0
1454 compiler. dbx_end_psymtab explicitly tests for zero, so
1455 don't relocate it. */
1457 if (nlist
.n_value
== 0
1458 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1460 textlow_not_set
= 1;
1464 textlow_not_set
= 0;
1466 past_first_source_file
= 1;
1468 if (prev_so_symnum
!= symnum
- 1)
1469 { /* Here if prev stab wasn't N_SO. */
1470 first_so_symnum
= symnum
;
1474 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
,
1475 includes_used
, symnum
* symbol_size
,
1476 valu
> pst
->texthigh
1477 ? valu
: pst
->texthigh
,
1478 dependency_list
, dependencies_used
,
1479 prev_textlow_not_set
);
1480 pst
= (struct partial_symtab
*) 0;
1482 dependencies_used
= 0;
1483 has_line_numbers
= 0;
1487 prev_so_symnum
= symnum
;
1489 /* End the current partial symtab and start a new one. */
1491 namestring
= set_namestring (objfile
, &nlist
);
1493 /* Null name means end of .o file. Don't start a new one. */
1494 if (*namestring
== '\000')
1497 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1498 The first one is a directory name; the second the file name.
1499 If pst exists, is empty, and has a filename ending in '/',
1500 we assume the previous N_SO was a directory name. */
1502 p
= lbasename (namestring
);
1503 if (p
!= namestring
&& *p
== '\000')
1505 /* Save the directory name SOs locally, then save it into
1506 the psymtab when it's created below. */
1507 dirname_nso
= namestring
;
1511 /* Some other compilers (C++ ones in particular) emit useless
1512 SOs for non-existant .c files. We ignore all subsequent SOs
1513 that immediately follow the first. */
1517 pst
= start_psymtab (objfile
,
1519 first_so_symnum
* symbol_size
,
1520 objfile
->global_psymbols
.next
,
1521 objfile
->static_psymbols
.next
);
1522 pst
->dirname
= dirname_nso
;
1530 enum language tmp_language
;
1532 /* Add this bincl to the bincl_list for future EXCLs. No
1533 need to save the string; it'll be around until
1534 read_dbx_symtab function returns. */
1536 namestring
= set_namestring (objfile
, &nlist
);
1537 tmp_language
= deduce_language_from_filename (namestring
);
1539 /* Only change the psymtab's language if we've learned
1540 something useful (eg. tmp_language is not language_unknown).
1541 In addition, to match what start_subfile does, never change
1543 if (tmp_language
!= language_unknown
1544 && (tmp_language
!= language_c
1545 || psymtab_language
!= language_cplus
))
1546 psymtab_language
= tmp_language
;
1550 /* FIXME: we should not get here without a PST to work on.
1551 Attempt to recover. */
1552 complaint (&symfile_complaints
,
1553 _("N_BINCL %s not in entries for "
1554 "any file, at symtab pos %d"),
1555 namestring
, symnum
);
1558 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1560 /* Mark down an include file in the current psymtab. */
1562 goto record_include_file
;
1567 enum language tmp_language
;
1569 /* Mark down an include file in the current psymtab. */
1570 namestring
= set_namestring (objfile
, &nlist
);
1571 tmp_language
= deduce_language_from_filename (namestring
);
1573 /* Only change the psymtab's language if we've learned
1574 something useful (eg. tmp_language is not language_unknown).
1575 In addition, to match what start_subfile does, never change
1577 if (tmp_language
!= language_unknown
1578 && (tmp_language
!= language_c
1579 || psymtab_language
!= language_cplus
))
1580 psymtab_language
= tmp_language
;
1582 /* In C++, one may expect the same filename to come round many
1583 times, when code is coming alternately from the main file
1584 and from inline functions in other files. So I check to see
1585 if this is a file we've seen before -- either the main
1586 source file, or a previously included file.
1588 This seems to be a lot of time to be spending on N_SOL, but
1589 things like "break c-exp.y:435" need to work (I
1590 suppose the psymtab_include_list could be hashed or put
1591 in a binary tree, if profiling shows this is a major hog). */
1592 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
1597 for (i
= 0; i
< includes_used
; i
++)
1598 if (filename_cmp (namestring
, psymtab_include_list
[i
]) == 0)
1607 record_include_file
:
1609 psymtab_include_list
[includes_used
++] = namestring
;
1610 if (includes_used
>= includes_allocated
)
1612 const char **orig
= psymtab_include_list
;
1614 psymtab_include_list
= (const char **)
1615 alloca ((includes_allocated
*= 2) * sizeof (const char *));
1616 memcpy (psymtab_include_list
, orig
,
1617 includes_used
* sizeof (const char *));
1621 case N_LSYM
: /* Typedef or automatic variable. */
1622 case N_STSYM
: /* Data seg var -- static. */
1623 case N_LCSYM
: /* BSS " */
1624 case N_ROSYM
: /* Read-only data seg var -- static. */
1625 case N_NBSTS
: /* Gould nobase. */
1626 case N_NBLCS
: /* symbols. */
1628 case N_GSYM
: /* Global (extern) variable; can be
1629 data or bss (sigh FIXME). */
1631 /* Following may probably be ignored; I'll leave them here
1632 for now (until I do Pascal and Modula 2 extensions). */
1634 case N_PC
: /* I may or may not need this; I
1636 case N_M2C
: /* I suspect that I can ignore this here. */
1637 case N_SCOPE
: /* Same. */
1641 namestring
= set_namestring (objfile
, &nlist
);
1643 /* See if this is an end of function stab. */
1644 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1648 /* It's value is the size (in bytes) of the function for
1649 function relative stabs, or the address of the function's
1650 end for old style stabs. */
1651 valu
= nlist
.n_value
+ last_function_start
;
1652 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1653 pst
->texthigh
= valu
;
1657 p
= (char *) strchr (namestring
, ':');
1659 continue; /* Not a debugging symbol. */
1662 sym_name
= NULL
; /* pacify "gcc -Werror" */
1663 if (psymtab_language
== language_cplus
)
1665 char *new_name
, *name
= (char *) xmalloc (p
- namestring
+ 1);
1666 memcpy (name
, namestring
, p
- namestring
);
1668 name
[p
- namestring
] = '\0';
1669 new_name
= cp_canonicalize_string (name
);
1670 if (new_name
!= NULL
)
1672 sym_len
= strlen (new_name
);
1673 sym_name
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
1682 sym_name
= namestring
;
1683 sym_len
= p
- namestring
;
1686 /* Main processing section for debugging symbols which
1687 the initial read through the symbol tables needs to worry
1688 about. If we reach this point, the symbol which we are
1689 considering is definitely one we are interested in.
1690 p must also contain the (valid) index into the namestring
1691 which indicates the debugging type symbol. */
1696 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1699 if (gdbarch_static_transform_name_p (gdbarch
))
1700 gdbarch_static_transform_name (gdbarch
, namestring
);
1702 add_psymbol_to_list (sym_name
, sym_len
, 1,
1703 VAR_DOMAIN
, LOC_STATIC
,
1704 &objfile
->static_psymbols
,
1705 nlist
.n_value
, psymtab_language
, objfile
);
1709 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1711 /* The addresses in these entries are reported to be
1712 wrong. See the code that reads 'G's for symtabs. */
1713 add_psymbol_to_list (sym_name
, sym_len
, 1,
1714 VAR_DOMAIN
, LOC_STATIC
,
1715 &objfile
->global_psymbols
,
1716 nlist
.n_value
, psymtab_language
, objfile
);
1720 /* When a 'T' entry is defining an anonymous enum, it
1721 may have a name which is the empty string, or a
1722 single space. Since they're not really defining a
1723 symbol, those shouldn't go in the partial symbol
1724 table. We do pick up the elements of such enums at
1725 'check_enum:', below. */
1726 if (p
>= namestring
+ 2
1727 || (p
== namestring
+ 1
1728 && namestring
[0] != ' '))
1730 add_psymbol_to_list (sym_name
, sym_len
, 1,
1731 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1732 &objfile
->static_psymbols
,
1733 0, psymtab_language
, objfile
);
1736 /* Also a typedef with the same name. */
1737 add_psymbol_to_list (sym_name
, sym_len
, 1,
1738 VAR_DOMAIN
, LOC_TYPEDEF
,
1739 &objfile
->static_psymbols
,
1740 0, psymtab_language
, objfile
);
1747 if (p
!= namestring
) /* a name is there, not just :T... */
1749 add_psymbol_to_list (sym_name
, sym_len
, 1,
1750 VAR_DOMAIN
, LOC_TYPEDEF
,
1751 &objfile
->static_psymbols
,
1752 0, psymtab_language
, objfile
);
1755 /* If this is an enumerated type, we need to
1756 add all the enum constants to the partial symbol
1757 table. This does not cover enums without names, e.g.
1758 "enum {a, b} c;" in C, but fortunately those are
1759 rare. There is no way for GDB to find those from the
1760 enum type without spending too much time on it. Thus
1761 to solve this problem, the compiler needs to put out the
1762 enum in a nameless type. GCC2 does this. */
1764 /* We are looking for something of the form
1765 <name> ":" ("t" | "T") [<number> "="] "e"
1766 {<constant> ":" <value> ","} ";". */
1768 /* Skip over the colon and the 't' or 'T'. */
1770 /* This type may be given a number. Also, numbers can come
1771 in pairs like (0,26). Skip over it. */
1772 while ((*p
>= '0' && *p
<= '9')
1773 || *p
== '(' || *p
== ',' || *p
== ')'
1779 /* The aix4 compiler emits extra crud before the members. */
1782 /* Skip over the type (?). */
1786 /* Skip over the colon. */
1790 /* We have found an enumerated type. */
1791 /* According to comments in read_enum_type
1792 a comma could end it instead of a semicolon.
1793 I don't know where that happens.
1795 while (*p
&& *p
!= ';' && *p
!= ',')
1799 /* Check for and handle cretinous dbx symbol name
1801 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1802 p
= next_symbol_text (objfile
);
1804 /* Point to the character after the name
1805 of the enum constant. */
1806 for (q
= p
; *q
&& *q
!= ':'; q
++)
1808 /* Note that the value doesn't matter for
1809 enum constants in psymtabs, just in symtabs. */
1810 add_psymbol_to_list (p
, q
- p
, 1,
1811 VAR_DOMAIN
, LOC_CONST
,
1812 &objfile
->static_psymbols
, 0,
1813 psymtab_language
, objfile
);
1814 /* Point past the name. */
1816 /* Skip over the value. */
1817 while (*p
&& *p
!= ',')
1819 /* Advance past the comma. */
1827 /* Constant, e.g. from "const" in Pascal. */
1828 add_psymbol_to_list (sym_name
, sym_len
, 1,
1829 VAR_DOMAIN
, LOC_CONST
,
1830 &objfile
->static_psymbols
, 0,
1831 psymtab_language
, objfile
);
1837 int name_len
= p
- namestring
;
1838 char *name
= (char *) xmalloc (name_len
+ 1);
1840 memcpy (name
, namestring
, name_len
);
1841 name
[name_len
] = '\0';
1842 function_outside_compilation_unit_complaint (name
);
1845 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1846 SECT_OFF_TEXT (objfile
));
1847 /* Kludges for ELF/STABS with Sun ACC. */
1848 last_function_name
= namestring
;
1849 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1850 value for the bottom of the text seg in those cases. */
1851 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1852 SECT_OFF_TEXT (objfile
))
1853 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1855 CORE_ADDR minsym_valu
=
1856 find_stab_function_addr (namestring
,
1857 pst
? pst
->filename
: NULL
,
1860 /* find_stab_function_addr will return 0 if the minimal
1861 symbol wasn't found. (Unfortunately, this might also
1862 be a valid address.) Anyway, if it *does* return 0,
1863 it is likely that the value was set correctly to begin
1865 if (minsym_valu
!= 0)
1866 nlist
.n_value
= minsym_valu
;
1868 if (pst
&& textlow_not_set
1869 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1871 pst
->textlow
= nlist
.n_value
;
1872 textlow_not_set
= 0;
1876 /* Keep track of the start of the last function so we
1877 can handle end of function symbols. */
1878 last_function_start
= nlist
.n_value
;
1880 /* In reordered executables this function may lie outside
1881 the bounds created by N_SO symbols. If that's the case
1882 use the address of this function as the low bound for
1883 the partial symbol table. */
1886 || (nlist
.n_value
< pst
->textlow
1888 != ANOFFSET (objfile
->section_offsets
,
1889 SECT_OFF_TEXT (objfile
))))))
1891 pst
->textlow
= nlist
.n_value
;
1892 textlow_not_set
= 0;
1894 add_psymbol_to_list (sym_name
, sym_len
, 1,
1895 VAR_DOMAIN
, LOC_BLOCK
,
1896 &objfile
->static_psymbols
,
1897 nlist
.n_value
, psymtab_language
, objfile
);
1900 /* Global functions were ignored here, but now they
1901 are put into the global psymtab like one would expect.
1902 They're also in the minimal symbol table. */
1906 int name_len
= p
- namestring
;
1907 char *name
= (char *) xmalloc (name_len
+ 1);
1909 memcpy (name
, namestring
, name_len
);
1910 name
[name_len
] = '\0';
1911 function_outside_compilation_unit_complaint (name
);
1914 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1915 SECT_OFF_TEXT (objfile
));
1916 /* Kludges for ELF/STABS with Sun ACC. */
1917 last_function_name
= namestring
;
1918 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1919 value for the bottom of the text seg in those cases. */
1920 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1921 SECT_OFF_TEXT (objfile
))
1922 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1924 CORE_ADDR minsym_valu
=
1925 find_stab_function_addr (namestring
,
1926 pst
? pst
->filename
: NULL
,
1929 /* find_stab_function_addr will return 0 if the minimal
1930 symbol wasn't found. (Unfortunately, this might also
1931 be a valid address.) Anyway, if it *does* return 0,
1932 it is likely that the value was set correctly to begin
1934 if (minsym_valu
!= 0)
1935 nlist
.n_value
= minsym_valu
;
1937 if (pst
&& textlow_not_set
1938 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1940 pst
->textlow
= nlist
.n_value
;
1941 textlow_not_set
= 0;
1945 /* Keep track of the start of the last function so we
1946 can handle end of function symbols. */
1947 last_function_start
= nlist
.n_value
;
1949 /* In reordered executables this function may lie outside
1950 the bounds created by N_SO symbols. If that's the case
1951 use the address of this function as the low bound for
1952 the partial symbol table. */
1955 || (nlist
.n_value
< pst
->textlow
1957 != ANOFFSET (objfile
->section_offsets
,
1958 SECT_OFF_TEXT (objfile
))))))
1960 pst
->textlow
= nlist
.n_value
;
1961 textlow_not_set
= 0;
1963 add_psymbol_to_list (sym_name
, sym_len
, 1,
1964 VAR_DOMAIN
, LOC_BLOCK
,
1965 &objfile
->global_psymbols
,
1966 nlist
.n_value
, psymtab_language
, objfile
);
1969 /* Two things show up here (hopefully); static symbols of
1970 local scope (static used inside braces) or extensions
1971 of structure symbols. We can ignore both. */
1985 case '#': /* For symbol identification (used in live ranges). */
1989 /* It is a C++ nested symbol. We don't need to record it
1990 (I don't think); if we try to look up foo::bar::baz,
1991 then symbols for the symtab containing foo should get
1992 read in, I think. */
1993 /* Someone says sun cc puts out symbols like
1994 /foo/baz/maclib::/usr/local/bin/maclib,
1995 which would get here with a symbol type of ':'. */
1999 /* Unexpected symbol descriptor. The second and subsequent stabs
2000 of a continued stab can show up here. The question is
2001 whether they ever can mimic a normal stab--it would be
2002 nice if not, since we certainly don't want to spend the
2003 time searching to the end of every string looking for
2006 complaint (&symfile_complaints
,
2007 _("unknown symbol descriptor `%c'"),
2010 /* Ignore it; perhaps it is an extension that we don't
2018 namestring
= set_namestring (objfile
, &nlist
);
2020 /* Find the corresponding bincl and mark that psymtab on the
2021 psymtab dependency list. */
2023 struct partial_symtab
*needed_pst
=
2024 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2026 /* If this include file was defined earlier in this file,
2028 if (needed_pst
== pst
)
2036 for (i
= 0; i
< dependencies_used
; i
++)
2037 if (dependency_list
[i
] == needed_pst
)
2043 /* If it's already in the list, skip the rest. */
2047 dependency_list
[dependencies_used
++] = needed_pst
;
2048 if (dependencies_used
>= dependencies_allocated
)
2050 struct partial_symtab
**orig
= dependency_list
;
2053 (struct partial_symtab
**)
2054 alloca ((dependencies_allocated
*= 2)
2055 * sizeof (struct partial_symtab
*));
2056 memcpy (dependency_list
, orig
,
2058 * sizeof (struct partial_symtab
*)));
2060 fprintf_unfiltered (gdb_stderr
,
2061 "Had to reallocate "
2062 "dependency list.\n");
2063 fprintf_unfiltered (gdb_stderr
,
2064 "New dependencies allocated: %d\n",
2065 dependencies_allocated
);
2073 /* Solaris 2 end of module, finish current partial symbol table.
2074 dbx_end_psymtab will set pst->texthigh to the proper value, which
2075 is necessary if a module compiled without debugging info
2076 follows this module. */
2077 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
2079 dbx_end_psymtab (objfile
, pst
,
2080 psymtab_include_list
, includes_used
,
2081 symnum
* symbol_size
,
2082 (CORE_ADDR
) 0, dependency_list
,
2083 dependencies_used
, textlow_not_set
);
2084 pst
= (struct partial_symtab
*) 0;
2086 dependencies_used
= 0;
2087 has_line_numbers
= 0;
2093 HANDLE_RBRAC (nlist
.n_value
);
2099 case N_SSYM
: /* Claim: Structure or union element.
2100 Hopefully, I can ignore this. */
2101 case N_ENTRY
: /* Alternate entry point; can ignore. */
2102 case N_MAIN
: /* Can definitely ignore this. */
2103 case N_CATCH
: /* These are GNU C++ extensions */
2104 case N_EHDECL
: /* that can safely be ignored here. */
2116 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2117 case N_DEFD
: /* GNU Modula-2 */
2118 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2120 case N_OBJ
: /* Useless types from Solaris. */
2123 /* These symbols aren't interesting; don't worry about them. */
2127 /* If we haven't found it yet, ignore it. It's probably some
2128 new type we don't know about yet. */
2129 unknown_symtype_complaint (hex_string (nlist
.n_type
));
2134 /* If there's stuff to be cleaned up, clean it up. */
2137 /* Don't set pst->texthigh lower than it already is. */
2138 CORE_ADDR text_end
=
2139 (lowest_text_address
== (CORE_ADDR
) -1
2140 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
2141 SECT_OFF_TEXT (objfile
)))
2142 : lowest_text_address
)
2145 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2146 symnum
* symbol_size
,
2147 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2148 dependency_list
, dependencies_used
, textlow_not_set
);
2151 do_cleanups (back_to
);
2154 /* Allocate and partially fill a partial symtab. It will be
2155 completely filled at the end of the symbol list.
2157 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2158 is the address relative to which its symbols are (incremental) or 0
2161 static struct partial_symtab
*
2162 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2163 int ldsymoff
, struct partial_symbol
**global_syms
,
2164 struct partial_symbol
**static_syms
)
2166 struct partial_symtab
*result
=
2167 start_psymtab_common (objfile
, filename
, textlow
,
2168 global_syms
, static_syms
);
2170 result
->read_symtab_private
=
2171 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2172 LDSYMOFF (result
) = ldsymoff
;
2173 result
->read_symtab
= dbx_read_symtab
;
2174 SYMBOL_SIZE (result
) = symbol_size
;
2175 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2176 STRING_OFFSET (result
) = string_table_offset
;
2177 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2179 /* Deduce the source language from the filename for this psymtab. */
2180 psymtab_language
= deduce_language_from_filename (filename
);
2185 /* Close off the current usage of PST.
2186 Returns PST or NULL if the partial symtab was empty and thrown away.
2188 FIXME: List variables and peculiarities of same. */
2190 struct partial_symtab
*
2191 dbx_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2192 const char **include_list
, int num_includes
,
2193 int capping_symbol_offset
, CORE_ADDR capping_text
,
2194 struct partial_symtab
**dependency_list
,
2195 int number_dependencies
,
2196 int textlow_not_set
)
2199 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2201 if (capping_symbol_offset
!= -1)
2202 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2203 pst
->texthigh
= capping_text
;
2205 /* Under Solaris, the N_SO symbols always have a value of 0,
2206 instead of the usual address of the .o file. Therefore,
2207 we have to do some tricks to fill in texthigh and textlow.
2208 The first trick is: if we see a static
2209 or global function, and the textlow for the current pst
2210 is not set (ie: textlow_not_set), then we use that function's
2211 address for the textlow of the pst. */
2213 /* Now, to fill in texthigh, we remember the last function seen
2214 in the .o file. Also, there's a hack in
2215 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2216 to here via the misc_info field. Therefore, we can fill in
2217 a reliable texthigh by taking the address plus size of the
2218 last function in the file. */
2220 if (pst
->texthigh
== 0 && last_function_name
2221 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2225 struct bound_minimal_symbol minsym
;
2227 p
= strchr (last_function_name
, ':');
2229 p
= last_function_name
;
2230 n
= p
- last_function_name
;
2231 p
= (char *) alloca (n
+ 2);
2232 strncpy (p
, last_function_name
, n
);
2235 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2236 if (minsym
.minsym
== NULL
)
2238 /* Sun Fortran appends an underscore to the minimal symbol name,
2239 try again with an appended underscore if the minimal symbol
2243 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2247 pst
->texthigh
= (BMSYMBOL_VALUE_ADDRESS (minsym
)
2248 + MSYMBOL_SIZE (minsym
.minsym
));
2250 last_function_name
= NULL
;
2253 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2255 /* This test will be true if the last .o file is only data. */
2256 else if (textlow_not_set
)
2257 pst
->textlow
= pst
->texthigh
;
2260 struct partial_symtab
*p1
;
2262 /* If we know our own starting text address, then walk through all other
2263 psymtabs for this objfile, and if any didn't know their ending text
2264 address, set it to our starting address. Take care to not set our
2265 own ending address to our starting address, nor to set addresses on
2266 `dependency' files that have both textlow and texthigh zero. */
2268 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2270 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2272 p1
->texthigh
= pst
->textlow
;
2273 /* If this file has only data, then make textlow match
2275 if (p1
->textlow
== 0)
2276 p1
->textlow
= p1
->texthigh
;
2281 /* End of kludge for patching Solaris textlow and texthigh. */
2283 end_psymtab_common (objfile
, pst
);
2285 pst
->number_of_dependencies
= number_dependencies
;
2286 if (number_dependencies
)
2288 pst
->dependencies
= XOBNEWVEC (&objfile
->objfile_obstack
,
2289 struct partial_symtab
*,
2290 number_dependencies
);
2291 memcpy (pst
->dependencies
, dependency_list
,
2292 number_dependencies
* sizeof (struct partial_symtab
*));
2295 pst
->dependencies
= 0;
2297 for (i
= 0; i
< num_includes
; i
++)
2299 struct partial_symtab
*subpst
=
2300 allocate_psymtab (include_list
[i
], objfile
);
2302 subpst
->read_symtab_private
=
2303 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2307 subpst
->texthigh
= 0;
2309 /* We could save slight bits of space by only making one of these,
2310 shared by the entire set of include files. FIXME-someday. */
2311 subpst
->dependencies
=
2312 XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
2313 subpst
->dependencies
[0] = pst
;
2314 subpst
->number_of_dependencies
= 1;
2316 subpst
->globals_offset
=
2317 subpst
->n_global_syms
=
2318 subpst
->statics_offset
=
2319 subpst
->n_static_syms
= 0;
2322 subpst
->compunit_symtab
= 0;
2323 subpst
->read_symtab
= pst
->read_symtab
;
2326 if (num_includes
== 0
2327 && number_dependencies
== 0
2328 && pst
->n_global_syms
== 0
2329 && pst
->n_static_syms
== 0
2330 && has_line_numbers
== 0)
2332 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2333 it is on the obstack, but we can forget to chain it on the list. */
2334 /* Empty psymtabs happen as a result of header files which don't have
2335 any symbols in them. There can be a lot of them. But this check
2336 is wrong, in that a psymtab with N_SLINE entries but nothing else
2337 is not empty, but we don't realize that. Fixing that without slowing
2338 things down might be tricky. */
2340 discard_psymtab (objfile
, pst
);
2342 /* Indicate that psymtab was thrown away. */
2349 dbx_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
2351 struct cleanup
*old_chain
;
2356 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2357 "Shouldn't happen.\n",
2362 /* Read in all partial symtabs on which this one is dependent. */
2363 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2364 if (!pst
->dependencies
[i
]->readin
)
2366 /* Inform about additional files that need to be read in. */
2369 fputs_filtered (" ", gdb_stdout
);
2371 fputs_filtered ("and ", gdb_stdout
);
2373 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2374 wrap_here (""); /* Flush output. */
2375 gdb_flush (gdb_stdout
);
2377 dbx_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
2380 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2382 /* Init stuff necessary for reading in symbols */
2385 old_chain
= make_cleanup (really_free_pendings
, 0);
2386 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2387 symbol_size
= SYMBOL_SIZE (pst
);
2389 /* Read in this file's symbols. */
2390 bfd_seek (objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2391 read_ofile_symtab (objfile
, pst
);
2393 do_cleanups (old_chain
);
2399 /* Read in all of the symbols for a given psymtab for real.
2400 Be verbose about it if the user wants that. SELF is not NULL. */
2403 dbx_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
2407 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2408 "Shouldn't happen.\n",
2413 if (LDSYMLEN (self
) || self
->number_of_dependencies
)
2415 struct cleanup
*back_to
;
2417 /* Print the message now, before reading the string table,
2418 to avoid disconcerting pauses. */
2421 printf_filtered ("Reading in symbols for %s...", self
->filename
);
2422 gdb_flush (gdb_stdout
);
2425 next_symbol_text_func
= dbx_next_symbol_text
;
2427 back_to
= make_cleanup (null_cleanup
, NULL
);
2429 if (DBX_STAB_SECTION (objfile
))
2432 = symfile_relocate_debug_section (objfile
,
2433 DBX_STAB_SECTION (objfile
),
2437 make_cleanup (free_current_contents
, (void *) &stabs_data
);
2440 dbx_psymtab_to_symtab_1 (objfile
, self
);
2442 do_cleanups (back_to
);
2444 /* Match with global symbols. This only needs to be done once,
2445 after all of the symtabs and dependencies have been read in. */
2446 scan_file_globals (objfile
);
2448 /* Finish up the debug error message. */
2450 printf_filtered ("done.\n");
2454 /* Read in a defined section of a specific object file's symbols. */
2457 read_ofile_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
2460 struct external_nlist
*bufp
;
2461 struct internal_nlist nlist
;
2463 unsigned max_symnum
;
2465 int sym_offset
; /* Offset to start of symbols to read */
2466 int sym_size
; /* Size of symbols to read */
2467 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2468 int text_size
; /* Size of text segment for symbols */
2469 struct section_offsets
*section_offsets
;
2471 sym_offset
= LDSYMOFF (pst
);
2472 sym_size
= LDSYMLEN (pst
);
2473 text_offset
= pst
->textlow
;
2474 text_size
= pst
->texthigh
- pst
->textlow
;
2475 section_offsets
= objfile
->section_offsets
;
2477 dbxread_objfile
= objfile
;
2479 stringtab_global
= DBX_STRINGTAB (objfile
);
2480 set_last_source_file (NULL
);
2482 abfd
= objfile
->obfd
;
2483 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2484 symbuf_end
= symbuf_idx
= 0;
2486 symbuf_left
= sym_offset
+ sym_size
;
2488 /* It is necessary to actually read one symbol *before* the start
2489 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2490 occurs before the N_SO symbol.
2492 Detecting this in read_dbx_symtab
2493 would slow down initial readin, so we look for it here instead. */
2494 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2496 stabs_seek (sym_offset
- symbol_size
);
2498 bufp
= &symbuf
[symbuf_idx
++];
2499 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2500 OBJSTAT (objfile
, n_stabs
++);
2502 namestring
= set_namestring (objfile
, &nlist
);
2504 processing_gcc_compilation
= 0;
2505 if (nlist
.n_type
== N_TEXT
)
2507 const char *tempstring
= namestring
;
2509 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2510 processing_gcc_compilation
= 1;
2511 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2512 processing_gcc_compilation
= 2;
2513 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2515 if (startswith (tempstring
, "__gnu_compiled"))
2516 processing_gcc_compilation
= 2;
2521 /* The N_SO starting this symtab is the first symbol, so we
2522 better not check the symbol before it. I'm not this can
2523 happen, but it doesn't hurt to check for it. */
2524 stabs_seek (sym_offset
);
2525 processing_gcc_compilation
= 0;
2528 if (symbuf_idx
== symbuf_end
)
2530 bufp
= &symbuf
[symbuf_idx
];
2531 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2532 error (_("First symbol in segment of executable not a source symbol"));
2534 max_symnum
= sym_size
/ symbol_size
;
2537 symnum
< max_symnum
;
2540 QUIT
; /* Allow this to be interruptable. */
2541 if (symbuf_idx
== symbuf_end
)
2543 bufp
= &symbuf
[symbuf_idx
++];
2544 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2545 OBJSTAT (objfile
, n_stabs
++);
2547 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2549 namestring
= set_namestring (objfile
, &nlist
);
2553 if (sizeof (nlist
.n_value
) > 4
2554 /* We are a 64-bit debugger debugging a 32-bit program. */
2555 && (type
== N_LSYM
|| type
== N_PSYM
))
2556 /* We have to be careful with the n_value in the case of N_LSYM
2557 and N_PSYM entries, because they are signed offsets from frame
2558 pointer, but we actually read them as unsigned 32-bit values.
2559 This is not a problem for 32-bit debuggers, for which negative
2560 values end up being interpreted correctly (as negative
2561 offsets) due to integer overflow.
2562 But we need to sign-extend the value for 64-bit debuggers,
2563 or we'll end up interpreting negative values as very large
2564 positive offsets. */
2565 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2566 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2567 namestring
, section_offsets
, objfile
);
2569 /* We skip checking for a new .o or -l file; that should never
2570 happen in this routine. */
2571 else if (type
== N_TEXT
)
2573 /* I don't think this code will ever be executed, because
2574 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2575 the N_SO symbol which starts this source file.
2576 However, there is no reason not to accept
2577 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2579 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2580 processing_gcc_compilation
= 1;
2581 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2582 processing_gcc_compilation
= 2;
2584 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2585 || type
== (unsigned char) N_NBTEXT
)
2587 /* Global symbol: see if we came across a dbx defintion for
2588 a corresponding symbol. If so, store the value. Remove
2589 syms from the chain when their values are stored, but
2590 search the whole chain, as there may be several syms from
2591 different files with the same name. */
2592 /* This is probably not true. Since the files will be read
2593 in one at a time, each reference to a global symbol will
2594 be satisfied in each file as it appears. So we skip this
2600 /* In a Solaris elf file, this variable, which comes from the
2601 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2602 which comes from pst->textlow is correct. */
2603 if (last_source_start_addr
== 0)
2604 last_source_start_addr
= text_offset
;
2606 /* In reordered executables last_source_start_addr may not be the
2607 lower bound for this symtab, instead use text_offset which comes
2608 from pst->textlow which is correct. */
2609 if (last_source_start_addr
> text_offset
)
2610 last_source_start_addr
= text_offset
;
2612 pst
->compunit_symtab
= end_symtab (text_offset
+ text_size
,
2613 SECT_OFF_TEXT (objfile
));
2617 dbxread_objfile
= NULL
;
2621 /* Record the namespace that the function defined by SYMBOL was
2622 defined in, if necessary. BLOCK is the associated block; use
2623 OBSTACK for allocation. */
2626 cp_set_block_scope (const struct symbol
*symbol
,
2627 struct block
*block
,
2628 struct obstack
*obstack
)
2630 if (SYMBOL_DEMANGLED_NAME (symbol
) != NULL
)
2632 /* Try to figure out the appropriate namespace from the
2635 /* FIXME: carlton/2003-04-15: If the function in question is
2636 a method of a class, the name will actually include the
2637 name of the class as well. This should be harmless, but
2638 is a little unfortunate. */
2640 const char *name
= SYMBOL_DEMANGLED_NAME (symbol
);
2641 unsigned int prefix_len
= cp_entire_prefix_len (name
);
2643 block_set_scope (block
,
2644 (const char *) obstack_copy0 (obstack
, name
, prefix_len
),
2649 /* This handles a single symbol from the symbol-file, building symbols
2650 into a GDB symtab. It takes these arguments and an implicit argument.
2652 TYPE is the type field of the ".stab" symbol entry.
2653 DESC is the desc field of the ".stab" entry.
2654 VALU is the value field of the ".stab" entry.
2655 NAME is the symbol name, in our address space.
2656 SECTION_OFFSETS is a set of amounts by which the sections of this
2657 object file were relocated when it was loaded into memory. Note
2658 that these section_offsets are not the objfile->section_offsets but
2659 the pst->section_offsets. All symbols that refer to memory
2660 locations need to be offset by these amounts.
2661 OBJFILE is the object file from which we are reading symbols. It
2662 is used in end_symtab. */
2665 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2666 const struct section_offsets
*section_offsets
,
2667 struct objfile
*objfile
)
2669 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2670 struct context_stack
*newobj
;
2671 /* This remembers the address of the start of a function. It is
2672 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2673 are relative to the current function's start address. On systems
2674 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2675 and is used to relocate these symbol types rather than
2677 static CORE_ADDR function_start_offset
;
2679 /* This holds the address of the start of a function, without the
2680 system peculiarities of function_start_offset. */
2681 static CORE_ADDR last_function_start
;
2683 /* If this is nonzero, we've seen an N_SLINE since the start of the
2684 current function. We use this to tell us to move the first sline
2685 to the beginning of the function regardless of what its given
2687 static int sline_found_in_function
= 1;
2689 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2690 source file. Used to detect the SunPRO solaris compiler. */
2691 static int n_opt_found
;
2693 if (!block_address_function_relative
)
2695 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2696 function start address, so just use the text offset. */
2697 function_start_offset
=
2698 ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2701 /* Something is wrong if we see real data before seeing a source
2704 if (get_last_source_file () == NULL
&& type
!= (unsigned char) N_SO
)
2706 /* Ignore any symbols which appear before an N_SO symbol.
2707 Currently no one puts symbols there, but we should deal
2708 gracefully with the case. A complain()t might be in order,
2709 but this should not be an error (). */
2718 if (*name
== '\000')
2720 /* This N_FUN marks the end of a function. This closes off
2721 the current block. */
2722 struct block
*block
;
2724 if (context_stack_depth
<= 0)
2726 lbrac_mismatch_complaint (symnum
);
2730 /* The following check is added before recording line 0 at
2731 end of function so as to handle hand-generated stabs
2732 which may have an N_FUN stabs at the end of the function,
2733 but no N_SLINE stabs. */
2734 if (sline_found_in_function
)
2736 CORE_ADDR addr
= last_function_start
+ valu
;
2738 record_line (current_subfile
, 0,
2739 gdbarch_addr_bits_remove (gdbarch
, addr
));
2742 within_function
= 0;
2743 newobj
= pop_context ();
2745 /* Make a block for the local symbols within. */
2746 block
= finish_block (newobj
->name
, &local_symbols
,
2747 newobj
->old_blocks
, NULL
,
2748 newobj
->start_addr
, newobj
->start_addr
+ valu
);
2750 /* For C++, set the block's scope. */
2751 if (SYMBOL_LANGUAGE (newobj
->name
) == language_cplus
)
2752 cp_set_block_scope (newobj
->name
, block
, &objfile
->objfile_obstack
);
2754 /* May be switching to an assembler file which may not be using
2755 block relative stabs, so reset the offset. */
2756 if (block_address_function_relative
)
2757 function_start_offset
= 0;
2762 sline_found_in_function
= 0;
2764 /* Relocate for dynamic loading. */
2765 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2766 valu
= gdbarch_addr_bits_remove (gdbarch
, valu
);
2767 last_function_start
= valu
;
2769 goto define_a_symbol
;
2772 /* This "symbol" just indicates the start of an inner lexical
2773 context within a function. */
2775 /* Ignore extra outermost context from SunPRO cc and acc. */
2776 if (n_opt_found
&& desc
== 1)
2779 if (block_address_function_relative
)
2780 /* Relocate for Sun ELF acc fn-relative syms. */
2781 valu
+= function_start_offset
;
2783 /* On most machines, the block addresses are relative to the
2784 N_SO, the linker did not relocate them (sigh). */
2785 valu
+= last_source_start_addr
;
2787 push_context (desc
, valu
);
2791 /* This "symbol" just indicates the end of an inner lexical
2792 context that was started with N_LBRAC. */
2794 /* Ignore extra outermost context from SunPRO cc and acc. */
2795 if (n_opt_found
&& desc
== 1)
2798 if (block_address_function_relative
)
2799 /* Relocate for Sun ELF acc fn-relative syms. */
2800 valu
+= function_start_offset
;
2802 /* On most machines, the block addresses are relative to the
2803 N_SO, the linker did not relocate them (sigh). */
2804 valu
+= last_source_start_addr
;
2806 if (context_stack_depth
<= 0)
2808 lbrac_mismatch_complaint (symnum
);
2812 newobj
= pop_context ();
2813 if (desc
!= newobj
->depth
)
2814 lbrac_mismatch_complaint (symnum
);
2816 if (local_symbols
!= NULL
)
2818 /* GCC development snapshots from March to December of
2819 2000 would output N_LSYM entries after N_LBRAC
2820 entries. As a consequence, these symbols are simply
2821 discarded. Complain if this is the case. */
2822 complaint (&symfile_complaints
,
2823 _("misplaced N_LBRAC entry; discarding local "
2824 "symbols which have no enclosing block"));
2826 local_symbols
= newobj
->locals
;
2828 if (context_stack_depth
> 1)
2830 /* This is not the outermost LBRAC...RBRAC pair in the
2831 function, its local symbols preceded it, and are the ones
2832 just recovered from the context stack. Define the block
2833 for them (but don't bother if the block contains no
2834 symbols. Should we complain on blocks without symbols?
2835 I can't think of any useful purpose for them). */
2836 if (local_symbols
!= NULL
)
2838 /* Muzzle a compiler bug that makes end < start.
2840 ??? Which compilers? Is this ever harmful?. */
2841 if (newobj
->start_addr
> valu
)
2843 complaint (&symfile_complaints
,
2844 _("block start larger than block end"));
2845 newobj
->start_addr
= valu
;
2847 /* Make a block for the local symbols within. */
2848 finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
2849 newobj
->start_addr
, valu
);
2854 /* This is the outermost LBRAC...RBRAC pair. There is no
2855 need to do anything; leave the symbols that preceded it
2856 to be attached to the function's own block. We need to
2857 indicate that we just moved outside of the function. */
2858 within_function
= 0;
2865 /* This kind of symbol indicates the start of an object file.
2866 Relocate for dynamic loading. */
2867 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2871 /* This type of symbol indicates the start of data for one
2872 source file. Finish the symbol table of the previous source
2873 file (if any) and start accumulating a new symbol table.
2874 Relocate for dynamic loading. */
2875 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2879 if (get_last_source_file ())
2881 /* Check if previous symbol was also an N_SO (with some
2882 sanity checks). If so, that one was actually the
2883 directory name, and the current one is the real file
2884 name. Patch things up. */
2885 if (previous_stab_code
== (unsigned char) N_SO
)
2887 patch_subfile_names (current_subfile
, name
);
2888 break; /* Ignore repeated SOs. */
2890 end_symtab (valu
, SECT_OFF_TEXT (objfile
));
2894 /* Null name means this just marks the end of text for this .o
2895 file. Don't start a new symtab in this case. */
2896 if (*name
== '\000')
2899 if (block_address_function_relative
)
2900 function_start_offset
= 0;
2903 start_symtab (objfile
, name
, NULL
, valu
);
2904 record_debugformat ("stabs");
2908 /* This type of symbol indicates the start of data for a
2909 sub-source-file, one whose contents were copied or included
2910 in the compilation of the main source file (whose name was
2911 given in the N_SO symbol). Relocate for dynamic loading. */
2912 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2913 start_subfile (name
);
2918 add_new_header_file (name
, valu
);
2919 start_subfile (name
);
2923 start_subfile (pop_subfile ());
2927 add_old_header_file (name
, valu
);
2931 /* This type of "symbol" really just records one line-number --
2932 core-address correspondence. Enter it in the line list for
2933 this symbol table. */
2935 /* Relocate for dynamic loading and for ELF acc
2936 function-relative symbols. */
2937 valu
+= function_start_offset
;
2939 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
2940 middle of the prologue instead of right at the start of the
2941 function. To deal with this we record the address for the
2942 first N_SLINE stab to be the start of the function instead of
2943 the listed location. We really shouldn't to this. When
2944 compiling with optimization, this first N_SLINE stab might be
2945 optimized away. Other (non-GCC) compilers don't emit this
2946 stab at all. There is no real harm in having an extra
2947 numbered line, although it can be a bit annoying for the
2948 user. However, it totally screws up our testsuite.
2950 So for now, keep adjusting the address of the first N_SLINE
2951 stab, but only for code compiled with GCC. */
2953 if (within_function
&& sline_found_in_function
== 0)
2955 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
2956 last_function_start
: valu
;
2958 record_line (current_subfile
, desc
,
2959 gdbarch_addr_bits_remove (gdbarch
, addr
));
2960 sline_found_in_function
= 1;
2963 record_line (current_subfile
, desc
,
2964 gdbarch_addr_bits_remove (gdbarch
, valu
));
2968 common_block_start (name
, objfile
);
2972 common_block_end (objfile
);
2975 /* The following symbol types need to have the appropriate
2976 offset added to their value; then we process symbol
2977 definitions in the name. */
2979 case N_STSYM
: /* Static symbol in data segment. */
2980 case N_LCSYM
: /* Static symbol in BSS segment. */
2981 case N_ROSYM
: /* Static symbol in read-only data segment. */
2982 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2983 Solaris 2's stabs-in-elf makes *most* symbols relative but
2984 leaves a few absolute (at least for Solaris 2.1 and version
2985 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
2986 the fence. .stab "foo:S...",N_STSYM is absolute (ld
2987 relocates it) .stab "foo:V...",N_STSYM is relative (section
2988 base subtracted). This leaves us no choice but to search for
2989 the 'S' or 'V'... (or pass the whole section_offsets stuff
2990 down ONE MORE function call level, which we really don't want
2995 /* Normal object file and NLMs have non-zero text seg offsets,
2996 but don't need their static syms offset in this fashion.
2997 XXX - This is really a crock that should be fixed in the
2998 solib handling code so that I don't have to work around it
3001 if (!symfile_relocatable
)
3003 p
= strchr (name
, ':');
3004 if (p
!= 0 && p
[1] == 'S')
3006 /* The linker relocated it. We don't want to add a
3007 Sun-stabs Tfoo.foo-like offset, but we *do*
3008 want to add whatever solib.c passed to
3009 symbol_file_add as addr (this is known to affect
3010 SunOS 4, and I suspect ELF too). Since there is no
3011 Ttext.text symbol, we can get addr from the text offset. */
3012 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3013 goto define_a_symbol
;
3016 /* Since it's not the kludge case, re-dispatch to the right
3027 internal_error (__FILE__
, __LINE__
,
3028 _("failed internal consistency check"));
3032 case_N_STSYM
: /* Static symbol in data segment. */
3033 case N_DSLINE
: /* Source line number, data segment. */
3034 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3035 goto define_a_symbol
;
3037 case_N_LCSYM
: /* Static symbol in BSS segment. */
3038 case N_BSLINE
: /* Source line number, BSS segment. */
3039 /* N_BROWS: overlaps with N_BSLINE. */
3040 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3041 goto define_a_symbol
;
3043 case_N_ROSYM
: /* Static symbol in read-only data segment. */
3044 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3045 goto define_a_symbol
;
3047 case N_ENTRY
: /* Alternate entry point. */
3048 /* Relocate for dynamic loading. */
3049 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3050 goto define_a_symbol
;
3052 /* The following symbol types we don't know how to process.
3053 Handle them in a "default" way, but complain to people who
3056 case N_CATCH
: /* Exception handler catcher. */
3057 case N_EHDECL
: /* Exception handler name. */
3058 case N_PC
: /* Global symbol in Pascal. */
3059 case N_M2C
: /* Modula-2 compilation unit. */
3060 /* N_MOD2: overlaps with N_EHDECL. */
3061 case N_SCOPE
: /* Modula-2 scope information. */
3062 case N_ECOML
: /* End common (local name). */
3063 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3068 unknown_symtype_complaint (hex_string (type
));
3071 /* The following symbol types don't need the address field
3072 relocated, since it is either unused, or is absolute. */
3074 case N_GSYM
: /* Global variable. */
3075 case N_NSYMS
: /* Number of symbols (Ultrix). */
3076 case N_NOMAP
: /* No map? (Ultrix). */
3077 case N_RSYM
: /* Register variable. */
3078 case N_DEFD
: /* Modula-2 GNU module dependency. */
3079 case N_SSYM
: /* Struct or union element. */
3080 case N_LSYM
: /* Local symbol in stack. */
3081 case N_PSYM
: /* Parameter variable. */
3082 case N_LENG
: /* Length of preceding symbol type. */
3086 char *colon_pos
= strchr (name
, ':');
3088 if (colon_pos
== NULL
)
3091 deftype
= colon_pos
[1];
3097 /* Deal with the SunPRO 3.0 compiler which omits the
3098 address from N_FUN symbols. */
3100 && valu
== ANOFFSET (section_offsets
,
3101 SECT_OFF_TEXT (objfile
))
3102 && gdbarch_sofun_address_maybe_missing (gdbarch
))
3104 CORE_ADDR minsym_valu
=
3105 find_stab_function_addr (name
, get_last_source_file (),
3108 /* The function find_stab_function_addr will return
3109 0 if the minimal symbol wasn't found.
3110 (Unfortunately, this might also be a valid
3111 address.) Anyway, if it *does* return 0, it is
3112 likely that the value was set correctly to begin
3114 if (minsym_valu
!= 0)
3118 if (block_address_function_relative
)
3119 /* For Solaris 2 compilers, the block addresses and
3120 N_SLINE's are relative to the start of the
3121 function. On normal systems, and when using GCC on
3122 Solaris 2, these addresses are just absolute, or
3123 relative to the N_SO, depending on
3124 BLOCK_ADDRESS_ABSOLUTE. */
3125 function_start_offset
= valu
;
3127 within_function
= 1;
3129 if (context_stack_depth
> 1)
3131 complaint (&symfile_complaints
,
3132 _("unmatched N_LBRAC before symtab pos %d"),
3137 if (context_stack_depth
> 0)
3139 struct block
*block
;
3141 newobj
= pop_context ();
3142 /* Make a block for the local symbols within. */
3143 block
= finish_block (newobj
->name
, &local_symbols
,
3144 newobj
->old_blocks
, NULL
,
3145 newobj
->start_addr
, valu
);
3147 /* For C++, set the block's scope. */
3148 if (SYMBOL_LANGUAGE (newobj
->name
) == language_cplus
)
3149 cp_set_block_scope (newobj
->name
, block
,
3150 &objfile
->objfile_obstack
);
3153 newobj
= push_context (0, valu
);
3154 newobj
->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3158 define_symbol (valu
, name
, desc
, type
, objfile
);
3164 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3165 for a bunch of other flags, too. Someday we may parse their
3166 flags; for now we ignore theirs and hope they'll ignore ours. */
3167 case N_OPT
: /* Solaris 2: Compiler options. */
3170 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3172 processing_gcc_compilation
= 2;
3179 case N_MAIN
: /* Name of main routine. */
3180 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3181 it with a symbol file with "main" and without N_MAIN. I'm
3182 not sure exactly what rule to follow but probably something
3183 like: N_MAIN takes precedence over "main" no matter what
3184 objfile it is in; If there is more than one N_MAIN, choose
3185 the one in the symfile_objfile; If there is more than one
3186 N_MAIN within a given objfile, complain() and choose
3187 arbitrarily. (kingdon) */
3189 set_objfile_main_name (objfile
, name
, language_unknown
);
3192 /* The following symbol types can be ignored. */
3193 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3194 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3195 /* N_UNDF: Solaris 2: File separator mark. */
3196 /* N_UNDF: -- we will never encounter it, since we only process
3197 one file's symbols at once. */
3198 case N_ENDM
: /* Solaris 2: End of module. */
3199 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3203 /* '#' is a GNU C extension to allow one symbol to refer to another
3206 Generally this is used so that an alias can refer to its main
3211 /* Initialize symbol reference names and determine if this is a
3212 definition. If a symbol reference is being defined, go ahead
3213 and add it. Otherwise, just return. */
3218 /* If this stab defines a new reference ID that is not on the
3219 reference list, then put it on the reference list.
3221 We go ahead and advance NAME past the reference, even though
3222 it is not strictly necessary at this time. */
3223 refnum
= symbol_reference_defined (&s
);
3225 if (!ref_search (refnum
))
3226 ref_add (refnum
, 0, name
, valu
);
3230 previous_stab_code
= type
;
3233 /* FIXME: The only difference between this and elfstab_build_psymtabs
3234 is the call to install_minimal_symbols for elf, and the support for
3235 split sections. If the differences are really that small, the code
3236 should be shared. */
3238 /* Scan and build partial symbols for an coff symbol file.
3239 The coff file has already been processed to get its minimal symbols.
3241 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3244 OBJFILE is the object file we are reading symbols from.
3245 ADDR is the address relative to which the symbols are (e.g.
3246 the base address of the text segment).
3247 TEXTADDR is the address of the text section.
3248 TEXTSIZE is the size of the text section.
3249 STABSECTS is the list of .stab sections in OBJFILE.
3250 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3251 .stabstr section exists.
3253 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3254 adjusted for coff details. */
3257 coffstab_build_psymtabs (struct objfile
*objfile
,
3258 CORE_ADDR textaddr
, unsigned int textsize
,
3259 struct stab_section_list
*stabsects
,
3260 file_ptr stabstroffset
, unsigned int stabstrsize
)
3263 bfd
*sym_bfd
= objfile
->obfd
;
3264 char *name
= bfd_get_filename (sym_bfd
);
3265 unsigned int stabsize
;
3267 DBX_TEXT_ADDR (objfile
) = textaddr
;
3268 DBX_TEXT_SIZE (objfile
) = textsize
;
3270 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3271 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3272 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3274 if (stabstrsize
> bfd_get_size (sym_bfd
))
3275 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3276 DBX_STRINGTAB (objfile
) = (char *)
3277 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3278 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3280 /* Now read in the string table in one big gulp. */
3282 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3284 perror_with_name (name
);
3285 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3286 if (val
!= stabstrsize
)
3287 perror_with_name (name
);
3289 stabsread_new_init ();
3290 buildsym_new_init ();
3291 free_header_files ();
3292 init_header_files ();
3294 processing_acc_compilation
= 1;
3296 /* In a coff file, we've already installed the minimal symbols that came
3297 from the coff (non-stab) symbol table, so always act like an
3298 incremental load here. */
3299 if (stabsects
->next
== NULL
)
3301 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3302 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3303 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3307 struct stab_section_list
*stabsect
;
3309 DBX_SYMCOUNT (objfile
) = 0;
3310 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3312 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3313 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3316 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3318 symbuf_sections
= stabsects
->next
;
3319 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3323 dbx_symfile_read (objfile
, 0);
3326 /* Scan and build partial symbols for an ELF symbol file.
3327 This ELF file has already been processed to get its minimal symbols.
3329 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3332 OBJFILE is the object file we are reading symbols from.
3333 ADDR is the address relative to which the symbols are (e.g.
3334 the base address of the text segment).
3335 STABSECT is the BFD section information for the .stab section.
3336 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3337 .stabstr section exists.
3339 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3340 adjusted for elf details. */
3343 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
3344 file_ptr stabstroffset
, unsigned int stabstrsize
)
3347 bfd
*sym_bfd
= objfile
->obfd
;
3348 char *name
= bfd_get_filename (sym_bfd
);
3349 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
3351 /* Find the first and last text address. dbx_symfile_read seems to
3353 find_text_range (sym_bfd
, objfile
);
3355 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3356 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3357 DBX_SYMCOUNT (objfile
)
3358 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3359 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3360 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3361 DBX_STAB_SECTION (objfile
) = stabsect
;
3363 if (stabstrsize
> bfd_get_size (sym_bfd
))
3364 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3365 DBX_STRINGTAB (objfile
) = (char *)
3366 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3367 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3369 /* Now read in the string table in one big gulp. */
3371 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3373 perror_with_name (name
);
3374 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3375 if (val
!= stabstrsize
)
3376 perror_with_name (name
);
3378 stabsread_new_init ();
3379 buildsym_new_init ();
3380 free_header_files ();
3381 init_header_files ();
3383 processing_acc_compilation
= 1;
3386 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3387 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3389 make_cleanup (free_current_contents
, (void *) &stabs_data
);
3391 /* In an elf file, we've already installed the minimal symbols that came
3392 from the elf (non-stab) symbol table, so always act like an
3393 incremental load here. dbx_symfile_read should not generate any new
3394 minimal symbols, since we will have already read the ELF dynamic symbol
3395 table and normal symbol entries won't be in the ".stab" section; but in
3396 case it does, it will install them itself. */
3397 dbx_symfile_read (objfile
, 0);
3399 do_cleanups (back_to
);
3402 /* Scan and build partial symbols for a file with special sections for stabs
3403 and stabstrings. The file has already been processed to get its minimal
3404 symbols, and any other symbols that might be necessary to resolve GSYMs.
3406 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3409 OBJFILE is the object file we are reading symbols from.
3410 ADDR is the address relative to which the symbols are (e.g. the base address
3411 of the text segment).
3412 STAB_NAME is the name of the section that contains the stabs.
3413 STABSTR_NAME is the name of the section that contains the stab strings.
3415 This routine is mostly copied from dbx_symfile_init and
3416 dbx_symfile_read. */
3419 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3420 char *stabstr_name
, char *text_name
)
3423 bfd
*sym_bfd
= objfile
->obfd
;
3424 char *name
= bfd_get_filename (sym_bfd
);
3426 asection
*stabstrsect
;
3427 asection
*text_sect
;
3428 struct dbx_symfile_info
*dbx
;
3430 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3431 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3437 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3438 "but not string section (%s)"),
3439 stab_name
, stabstr_name
);
3441 dbx
= XCNEW (struct dbx_symfile_info
);
3442 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
3444 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3446 error (_("Can't find %s section in symbol file"), text_name
);
3447 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3448 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3450 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3451 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3452 / DBX_SYMBOL_SIZE (objfile
);
3453 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3454 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING
3458 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3459 error (_("ridiculous string table size: %d bytes"),
3460 DBX_STRINGTAB_SIZE (objfile
));
3461 DBX_STRINGTAB (objfile
) = (char *)
3462 obstack_alloc (&objfile
->objfile_obstack
,
3463 DBX_STRINGTAB_SIZE (objfile
) + 1);
3464 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3466 /* Now read in the string table in one big gulp. */
3468 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3469 stabstrsect
, /* bfd section */
3470 DBX_STRINGTAB (objfile
), /* input buffer */
3471 0, /* offset into section */
3472 DBX_STRINGTAB_SIZE (objfile
)); /* amount to
3476 perror_with_name (name
);
3478 stabsread_new_init ();
3479 buildsym_new_init ();
3480 free_header_files ();
3481 init_header_files ();
3483 /* Now, do an incremental load. */
3485 processing_acc_compilation
= 1;
3486 dbx_symfile_read (objfile
, 0);
3489 static const struct sym_fns aout_sym_fns
=
3491 dbx_new_init
, /* init anything gbl to entire symtab */
3492 dbx_symfile_init
, /* read initial info, setup for sym_read() */
3493 dbx_symfile_read
, /* read a symbol file into symtab */
3494 NULL
, /* sym_read_psymbols */
3495 dbx_symfile_finish
, /* finished with file, cleanup */
3496 default_symfile_offsets
, /* parse user's offsets to internal form */
3497 default_symfile_segments
, /* Get segment information from a file. */
3499 default_symfile_relocate
, /* Relocate a debug section. */
3500 NULL
, /* sym_probe_fns */
3505 _initialize_dbxread (void)
3507 add_symtab_fns (bfd_target_aout_flavour
, &aout_sym_fns
);
3509 dbx_objfile_data_key
3510 = register_objfile_data_with_cleanup (NULL
, dbx_free_symfile_info
);