1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2015 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
= (int *) xmalloc (10 * sizeof (int));
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
;
409 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
410 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
412 add_this_object_header_file (i
);
416 static struct type
**
417 explicit_lookup_type (int real_filenum
, int index
)
419 struct header_file
*f
= &HEADER_FILES (dbxread_objfile
)[real_filenum
];
421 if (index
>= f
->length
)
424 f
->vector
= (struct type
**)
425 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
426 memset (&f
->vector
[f
->length
/ 2],
427 '\0', f
->length
* sizeof (struct type
*) / 2);
429 return &f
->vector
[index
];
434 record_minimal_symbol (const char *name
, CORE_ADDR address
, int type
,
435 struct objfile
*objfile
)
437 enum minimal_symbol_type ms_type
;
444 section
= SECT_OFF_TEXT (objfile
);
448 section
= SECT_OFF_DATA (objfile
);
452 section
= SECT_OFF_BSS (objfile
);
461 section
= SECT_OFF_DATA (objfile
);
464 /* I don't think this type actually exists; since a N_SETV is the result
465 of going over many .o files, it doesn't make sense to have one
467 ms_type
= mst_file_data
;
468 section
= SECT_OFF_DATA (objfile
);
475 ms_type
= mst_file_text
;
476 section
= SECT_OFF_TEXT (objfile
);
479 ms_type
= mst_file_data
;
481 /* Check for __DYNAMIC, which is used by Sun shared libraries.
482 Record it as global even if it's local, not global, so
483 lookup_minimal_symbol can find it. We don't check symbol_leading_char
484 because for SunOS4 it always is '_'. */
485 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
488 /* Same with virtual function tables, both global and static. */
490 const char *tempstring
= name
;
492 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
494 if (is_vtable_name (tempstring
))
497 section
= SECT_OFF_DATA (objfile
);
500 ms_type
= mst_file_bss
;
501 section
= SECT_OFF_BSS (objfile
);
504 ms_type
= mst_unknown
;
509 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
510 && address
< lowest_text_address
)
511 lowest_text_address
= address
;
513 prim_record_minimal_symbol_and_info
514 (name
, address
, ms_type
, section
, objfile
);
517 /* Scan and build partial symbols for a symbol file.
518 We have been initialized by a call to dbx_symfile_init, which
519 put all the relevant info into a "struct dbx_symfile_info",
520 hung off the objfile structure. */
523 dbx_symfile_read (struct objfile
*objfile
, int symfile_flags
)
527 struct cleanup
*back_to
;
529 sym_bfd
= objfile
->obfd
;
531 /* .o and .nlm files are relocatables with text, data and bss segs based at
532 0. This flag disables special (Solaris stabs-in-elf only) fixups for
533 symbols with a value of 0. */
535 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
537 /* This is true for Solaris (and all other systems which put stabs
538 in sections, hopefully, since it would be silly to do things
539 differently from Solaris), and false for SunOS4 and other a.out
541 block_address_function_relative
=
542 ((startswith (bfd_get_target (sym_bfd
), "elf"))
543 || (startswith (bfd_get_target (sym_bfd
), "som"))
544 || (startswith (bfd_get_target (sym_bfd
), "coff"))
545 || (startswith (bfd_get_target (sym_bfd
), "pe"))
546 || (startswith (bfd_get_target (sym_bfd
), "epoc-pe"))
547 || (startswith (bfd_get_target (sym_bfd
), "nlm")));
549 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
551 perror_with_name (objfile_name (objfile
));
553 /* Size the symbol table. */
554 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
555 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
557 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
558 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
560 free_pending_blocks ();
561 back_to
= make_cleanup (really_free_pendings
, 0);
563 init_minimal_symbol_collection ();
564 make_cleanup_discard_minimal_symbols ();
566 /* Read stabs data from executable file and define symbols. */
568 read_dbx_symtab (objfile
);
570 /* Add the dynamic symbols. */
572 read_dbx_dynamic_symtab (objfile
);
574 /* Install any minimal symbols that have been collected as the current
575 minimal symbols for this objfile. */
577 install_minimal_symbols (objfile
);
579 do_cleanups (back_to
);
582 /* Initialize anything that needs initializing when a completely new
583 symbol file is specified (not just adding some symbols from another
584 file, e.g. a shared library). */
587 dbx_new_init (struct objfile
*ignore
)
589 stabsread_new_init ();
590 buildsym_new_init ();
591 init_header_files ();
595 /* dbx_symfile_init ()
596 is the dbx-specific initialization routine for reading symbols.
597 It is passed a struct objfile which contains, among other things,
598 the BFD for the file whose symbols are being read, and a slot for a pointer
599 to "private data" which we fill with goodies.
601 We read the string table into malloc'd space and stash a pointer to it.
603 Since BFD doesn't know how to read debug symbols in a format-independent
604 way (and may never do so...), we have to do it ourselves. We will never
605 be called unless this is an a.out (or very similar) file.
606 FIXME, there should be a cleaner peephole into the BFD environment here. */
608 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
611 dbx_symfile_init (struct objfile
*objfile
)
614 bfd
*sym_bfd
= objfile
->obfd
;
615 char *name
= bfd_get_filename (sym_bfd
);
617 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
618 struct dbx_symfile_info
*dbx
;
620 /* Allocate struct to keep track of the symfile. */
621 dbx
= XCNEW (struct dbx_symfile_info
);
622 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
624 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
625 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
626 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
628 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
629 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
630 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
632 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
634 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
636 error (_("Can't find .text section in symbol file"));
637 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
638 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
640 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
641 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
642 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
644 /* Read the string table and stash it away in the objfile_obstack.
645 When we blow away the objfile the string table goes away as well.
646 Note that gdb used to use the results of attempting to malloc the
647 string table, based on the size it read, as a form of sanity check
648 for botched byte swapping, on the theory that a byte swapped string
649 table size would be so totally bogus that the malloc would fail. Now
650 that we put in on the objfile_obstack, we can't do this since gdb gets
651 a fatal error (out of virtual memory) if the size is bogus. We can
652 however at least check to see if the size is less than the size of
653 the size field itself, or larger than the size of the entire file.
654 Note that all valid string tables have a size greater than zero, since
655 the bytes used to hold the size are included in the count. */
657 if (STRING_TABLE_OFFSET
== 0)
659 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
660 will never be zero, even when there is no string table. This
661 would appear to be a bug in bfd. */
662 DBX_STRINGTAB_SIZE (objfile
) = 0;
663 DBX_STRINGTAB (objfile
) = NULL
;
667 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
669 perror_with_name (name
);
671 memset (size_temp
, 0, sizeof (size_temp
));
672 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
675 perror_with_name (name
);
679 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
680 EOF if there is no string table, and attempting to read the size
681 from EOF will read zero bytes. */
682 DBX_STRINGTAB_SIZE (objfile
) = 0;
683 DBX_STRINGTAB (objfile
) = NULL
;
687 /* Read some data that would appear to be the string table size.
688 If there really is a string table, then it is probably the right
689 size. Byteswap if necessary and validate the size. Note that
690 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
691 random data that happened to be at STRING_TABLE_OFFSET, because
692 bfd can't tell us there is no string table, the sanity checks may
693 or may not catch this. */
694 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
696 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
697 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
698 error (_("ridiculous string table size (%d bytes)."),
699 DBX_STRINGTAB_SIZE (objfile
));
701 DBX_STRINGTAB (objfile
) =
702 (char *) obstack_alloc (&objfile
->objfile_obstack
,
703 DBX_STRINGTAB_SIZE (objfile
));
704 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
706 /* Now read in the string table in one big gulp. */
708 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
710 perror_with_name (name
);
711 val
= bfd_bread (DBX_STRINGTAB (objfile
),
712 DBX_STRINGTAB_SIZE (objfile
),
714 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
715 perror_with_name (name
);
720 /* Perform any local cleanups required when we are done with a particular
721 objfile. I.E, we are in the process of discarding all symbol information
722 for an objfile, freeing up all memory held for it, and unlinking the
723 objfile struct from the global list of known objfiles. */
726 dbx_symfile_finish (struct objfile
*objfile
)
728 free_header_files ();
732 dbx_free_symfile_info (struct objfile
*objfile
, void *arg
)
734 struct dbx_symfile_info
*dbx
= arg
;
736 if (dbx
->header_files
!= NULL
)
738 int i
= dbx
->n_header_files
;
739 struct header_file
*hfiles
= dbx
->header_files
;
743 xfree (hfiles
[i
].name
);
744 xfree (hfiles
[i
].vector
);
754 /* Buffer for reading the symbol table entries. */
755 static struct external_nlist symbuf
[4096];
756 static int symbuf_idx
;
757 static int symbuf_end
;
759 /* Name of last function encountered. Used in Solaris to approximate
760 object file boundaries. */
761 static char *last_function_name
;
763 /* The address in memory of the string table of the object file we are
764 reading (which might not be the "main" object file, but might be a
765 shared library or some other dynamically loaded thing). This is
766 set by read_dbx_symtab when building psymtabs, and by
767 read_ofile_symtab when building symtabs, and is used only by
768 next_symbol_text. FIXME: If that is true, we don't need it when
769 building psymtabs, right? */
770 static char *stringtab_global
;
772 /* These variables are used to control fill_symbuf when the stabs
773 symbols are not contiguous (as may be the case when a COFF file is
774 linked using --split-by-reloc). */
775 static struct stab_section_list
*symbuf_sections
;
776 static unsigned int symbuf_left
;
777 static unsigned int symbuf_read
;
779 /* This variable stores a global stabs buffer, if we read stabs into
780 memory in one chunk in order to process relocations. */
781 static bfd_byte
*stabs_data
;
783 /* Refill the symbol table input buffer
784 and set the variables that control fetching entries from it.
785 Reports an error if no data available.
786 This function can read past the end of the symbol table
787 (into the string table) but this does no harm. */
790 fill_symbuf (bfd
*sym_bfd
)
797 nbytes
= sizeof (symbuf
);
798 if (nbytes
> symbuf_left
)
799 nbytes
= symbuf_left
;
800 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
802 else if (symbuf_sections
== NULL
)
804 count
= sizeof (symbuf
);
805 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
809 if (symbuf_left
<= 0)
811 file_ptr filepos
= symbuf_sections
->section
->filepos
;
813 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
814 perror_with_name (bfd_get_filename (sym_bfd
));
815 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
816 symbol_table_offset
= filepos
- symbuf_read
;
817 symbuf_sections
= symbuf_sections
->next
;
821 if (count
> sizeof (symbuf
))
822 count
= sizeof (symbuf
);
823 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
827 perror_with_name (bfd_get_filename (sym_bfd
));
828 else if (nbytes
== 0)
829 error (_("Premature end of file reading symbol table"));
830 symbuf_end
= nbytes
/ symbol_size
;
832 symbuf_left
-= nbytes
;
833 symbuf_read
+= nbytes
;
837 stabs_seek (int sym_offset
)
841 symbuf_read
+= sym_offset
;
842 symbuf_left
-= sym_offset
;
845 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
848 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
850 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
851 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
852 (intern).n_other = 0; \
853 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
854 if (bfd_get_sign_extend_vma (abfd)) \
855 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
857 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
860 /* Invariant: The symbol pointed to by symbuf_idx is the first one
861 that hasn't been swapped. Swap the symbol at the same time
862 that symbuf_idx is incremented. */
864 /* dbx allows the text of a symbol name to be continued into the
865 next symbol name! When such a continuation is encountered
866 (a \ at the end of the text of a name)
867 call this function to get the continuation. */
870 dbx_next_symbol_text (struct objfile
*objfile
)
872 struct internal_nlist nlist
;
874 if (symbuf_idx
== symbuf_end
)
875 fill_symbuf (symfile_bfd
);
878 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
879 OBJSTAT (objfile
, n_stabs
++);
883 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
886 /* Initialize the list of bincls to contain none and have some
890 init_bincl_list (int number
, struct objfile
*objfile
)
892 bincls_allocated
= number
;
893 next_bincl
= bincl_list
= (struct header_file_location
*)
894 xmalloc (bincls_allocated
* sizeof (struct header_file_location
));
897 /* Add a bincl to the list. */
900 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
902 if (next_bincl
>= bincl_list
+ bincls_allocated
)
904 int offset
= next_bincl
- bincl_list
;
906 bincls_allocated
*= 2;
907 bincl_list
= (struct header_file_location
*)
908 xrealloc ((char *) bincl_list
,
909 bincls_allocated
* sizeof (struct header_file_location
));
910 next_bincl
= bincl_list
+ offset
;
912 next_bincl
->pst
= pst
;
913 next_bincl
->instance
= instance
;
914 next_bincl
++->name
= name
;
917 /* Given a name, value pair, find the corresponding
918 bincl in the list. Return the partial symtab associated
919 with that header_file_location. */
921 static struct partial_symtab
*
922 find_corresponding_bincl_psymtab (char *name
, int instance
)
924 struct header_file_location
*bincl
;
926 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
927 if (bincl
->instance
== instance
928 && strcmp (name
, bincl
->name
) == 0)
931 repeated_header_complaint (name
, symnum
);
932 return (struct partial_symtab
*) 0;
935 /* Free the storage allocated for the bincl list. */
938 free_bincl_list (struct objfile
*objfile
)
941 bincls_allocated
= 0;
945 do_free_bincl_list_cleanup (void *objfile
)
947 free_bincl_list (objfile
);
950 static struct cleanup
*
951 make_cleanup_free_bincl_list (struct objfile
*objfile
)
953 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
956 /* Set namestring based on nlist. If the string table index is invalid,
957 give a fake name, and print a single error message per symbol file read,
958 rather than abort the symbol reading or flood the user with messages. */
961 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
965 if (nlist
->n_strx
+ file_string_table_offset
966 >= DBX_STRINGTAB_SIZE (objfile
)
967 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
969 complaint (&symfile_complaints
,
970 _("bad string table offset in symbol %d"),
972 namestring
= "<bad string table offset>";
975 namestring
= (nlist
->n_strx
+ file_string_table_offset
976 + DBX_STRINGTAB (objfile
));
980 /* Scan a SunOs dynamic symbol table for symbols of interest and
981 add them to the minimal symbol table. */
984 read_dbx_dynamic_symtab (struct objfile
*objfile
)
986 bfd
*abfd
= objfile
->obfd
;
987 struct cleanup
*back_to
;
1000 /* Check that the symbol file has dynamic symbols that we know about.
1001 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1002 on a sun4 host (and vice versa) and bfd is not configured
1003 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1004 so we ignore the dynamic symbols in this case. */
1005 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1006 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1007 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1010 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1011 if (dynsym_size
< 0)
1014 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1015 back_to
= make_cleanup (xfree
, dynsyms
);
1017 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1018 if (dynsym_count
< 0)
1020 do_cleanups (back_to
);
1024 /* Enter dynamic symbols into the minimal symbol table
1025 if this is a stripped executable. */
1026 if (bfd_get_symcount (abfd
) <= 0)
1029 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1031 asymbol
*sym
= *symptr
;
1035 sec
= bfd_get_section (sym
);
1037 /* BFD symbols are section relative. */
1038 sym_value
= sym
->value
+ sec
->vma
;
1040 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1044 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1048 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1055 if (sym
->flags
& BSF_GLOBAL
)
1058 record_minimal_symbol (bfd_asymbol_name (sym
), sym_value
,
1063 /* Symbols from shared libraries have a dynamic relocation entry
1064 that points to the associated slot in the procedure linkage table.
1065 We make a mininal symbol table entry with type mst_solib_trampoline
1066 at the address in the procedure linkage table. */
1067 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1068 if (dynrel_size
< 0)
1070 do_cleanups (back_to
);
1074 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1075 make_cleanup (xfree
, dynrels
);
1077 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1078 if (dynrel_count
< 0)
1080 do_cleanups (back_to
);
1084 for (counter
= 0, relptr
= dynrels
;
1085 counter
< dynrel_count
;
1086 counter
++, relptr
++)
1088 arelent
*rel
= *relptr
;
1089 CORE_ADDR address
= rel
->address
;
1091 switch (bfd_get_arch (abfd
))
1093 case bfd_arch_sparc
:
1094 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1098 /* `16' is the type BFD produces for a jump table relocation. */
1099 if (rel
->howto
->type
!= 16)
1102 /* Adjust address in the jump table to point to
1103 the start of the bsr instruction. */
1110 name
= bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1111 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1115 do_cleanups (back_to
);
1119 find_stab_function_addr (char *namestring
, const char *filename
,
1120 struct objfile
*objfile
)
1122 struct bound_minimal_symbol msym
;
1126 p
= strchr (namestring
, ':');
1131 strncpy (p
, namestring
, n
);
1134 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1135 if (msym
.minsym
== NULL
)
1137 /* Sun Fortran appends an underscore to the minimal symbol name,
1138 try again with an appended underscore if the minimal symbol
1142 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1145 if (msym
.minsym
== NULL
&& filename
!= NULL
)
1147 /* Try again without the filename. */
1149 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1151 if (msym
.minsym
== NULL
&& filename
!= NULL
)
1153 /* And try again for Sun Fortran, but without the filename. */
1156 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1159 return msym
.minsym
== NULL
? 0 : BMSYMBOL_VALUE_ADDRESS (msym
);
1163 function_outside_compilation_unit_complaint (const char *arg1
)
1165 complaint (&symfile_complaints
,
1166 _("function `%s' appears to be defined "
1167 "outside of all compilation units"),
1171 /* Setup partial_symtab's describing each source file for which
1172 debugging information is available. */
1175 read_dbx_symtab (struct objfile
*objfile
)
1177 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1178 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
1179 struct internal_nlist nlist
;
1180 CORE_ADDR text_addr
;
1187 int past_first_source_file
= 0;
1188 CORE_ADDR last_function_start
= 0;
1189 struct cleanup
*back_to
;
1191 int textlow_not_set
;
1192 int data_sect_index
;
1194 /* Current partial symtab. */
1195 struct partial_symtab
*pst
;
1197 /* List of current psymtab's include files. */
1198 const char **psymtab_include_list
;
1199 int includes_allocated
;
1202 /* Index within current psymtab dependency list. */
1203 struct partial_symtab
**dependency_list
;
1204 int dependencies_used
, dependencies_allocated
;
1206 text_addr
= DBX_TEXT_ADDR (objfile
);
1207 text_size
= DBX_TEXT_SIZE (objfile
);
1209 /* FIXME. We probably want to change stringtab_global rather than add this
1210 while processing every symbol entry. FIXME. */
1211 file_string_table_offset
= 0;
1212 next_file_string_table_offset
= 0;
1214 stringtab_global
= DBX_STRINGTAB (objfile
);
1216 pst
= (struct partial_symtab
*) 0;
1218 includes_allocated
= 30;
1220 psymtab_include_list
= (const char **) alloca (includes_allocated
*
1221 sizeof (const char *));
1223 dependencies_allocated
= 30;
1224 dependencies_used
= 0;
1226 (struct partial_symtab
**) alloca (dependencies_allocated
*
1227 sizeof (struct partial_symtab
*));
1229 /* Init bincl list */
1230 init_bincl_list (20, objfile
);
1231 back_to
= make_cleanup_free_bincl_list (objfile
);
1233 set_last_source_file (NULL
);
1235 lowest_text_address
= (CORE_ADDR
) -1;
1237 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1238 abfd
= objfile
->obfd
;
1239 symbuf_end
= symbuf_idx
= 0;
1240 next_symbol_text_func
= dbx_next_symbol_text
;
1241 textlow_not_set
= 1;
1242 has_line_numbers
= 0;
1244 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1245 to global and static variables. The stab for a global or static
1246 variable doesn't give us any indication of which section it's in,
1247 so we can't tell immediately which offset in
1248 objfile->section_offsets we should apply to the variable's
1251 We could certainly find out which section contains the variable
1252 by looking up the variable's unrelocated address with
1253 find_pc_section, but that would be expensive; this is the
1254 function that constructs the partial symbol tables by examining
1255 every symbol in the entire executable, and it's
1256 performance-critical. So that expense would not be welcome. I'm
1257 not sure what to do about this at the moment.
1259 What we have done for years is to simply assume that the .data
1260 section's offset is appropriate for all global and static
1261 variables. Recently, this was expanded to fall back to the .bss
1262 section's offset if there is no .data section, and then to the
1263 .rodata section's offset. */
1264 data_sect_index
= objfile
->sect_index_data
;
1265 if (data_sect_index
== -1)
1266 data_sect_index
= SECT_OFF_BSS (objfile
);
1267 if (data_sect_index
== -1)
1268 data_sect_index
= SECT_OFF_RODATA (objfile
);
1270 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1271 for the file to have no .data, no .bss, and no .text at all, if
1272 it also has no global or static variables. If it does, we will
1273 get an internal error from an ANOFFSET macro below when we try to
1274 use data_sect_index. */
1276 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1278 /* Get the symbol for this run and pull out some info. */
1279 QUIT
; /* Allow this to be interruptable. */
1280 if (symbuf_idx
== symbuf_end
)
1282 bufp
= &symbuf
[symbuf_idx
++];
1285 * Special case to speed up readin.
1287 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1289 has_line_numbers
= 1;
1293 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1294 OBJSTAT (objfile
, n_stabs
++);
1296 /* Ok. There is a lot of code duplicated in the rest of this
1297 switch statement (for efficiency reasons). Since I don't
1298 like duplicating code, I will do my penance here, and
1299 describe the code which is duplicated:
1301 *) The assignment to namestring.
1302 *) The call to strchr.
1303 *) The addition of a partial symbol the two partial
1304 symbol lists. This last is a large section of code, so
1305 I've imbedded it in the following macro. */
1307 switch (nlist
.n_type
)
1310 * Standard, external, non-debugger, symbols
1313 case N_TEXT
| N_EXT
:
1314 case N_NBTEXT
| N_EXT
:
1317 case N_DATA
| N_EXT
:
1318 case N_NBDATA
| N_EXT
:
1323 case N_NBBSS
| N_EXT
:
1324 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1329 namestring
= set_namestring (objfile
, &nlist
);
1331 record_minimal_symbol (namestring
, nlist
.n_value
,
1332 nlist
.n_type
, objfile
); /* Always */
1335 /* Standard, local, non-debugger, symbols. */
1339 /* We need to be able to deal with both N_FN or N_TEXT,
1340 because we have no way of knowing whether the sys-supplied ld
1341 or GNU ld was used to make the executable. Sequents throw
1342 in another wrinkle -- they renumbered N_FN. */
1347 namestring
= set_namestring (objfile
, &nlist
);
1349 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1350 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1351 && namestring
[nsl
- 2] == '.'))
1353 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1354 SECT_OFF_TEXT (objfile
));
1356 if (past_first_source_file
&& pst
1357 /* The gould NP1 uses low values for .o and -l symbols
1358 which are not the address. */
1359 && nlist
.n_value
>= pst
->textlow
)
1361 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
,
1362 includes_used
, symnum
* symbol_size
,
1363 nlist
.n_value
> pst
->texthigh
1364 ? nlist
.n_value
: pst
->texthigh
,
1365 dependency_list
, dependencies_used
,
1367 pst
= (struct partial_symtab
*) 0;
1369 dependencies_used
= 0;
1370 has_line_numbers
= 0;
1373 past_first_source_file
= 1;
1382 case N_UNDF
| N_EXT
:
1383 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1384 We used to rely on the target to tell us whether it knows
1385 where the symbol has been relocated to, but none of the
1386 target implementations actually provided that operation.
1387 So we just ignore the symbol, the same way we would do if
1388 we had a target-side symbol lookup which returned no match.
1390 All other symbols (with nlist.n_value == 0), are really
1391 undefined, and so we ignore them too. */
1395 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1397 /* Deal with relative offsets in the string table
1398 used in ELF+STAB under Solaris. If we want to use the
1399 n_strx field, which contains the name of the file,
1400 we must adjust file_string_table_offset *before* calling
1401 set_namestring(). */
1402 past_first_source_file
= 1;
1403 file_string_table_offset
= next_file_string_table_offset
;
1404 next_file_string_table_offset
=
1405 file_string_table_offset
+ nlist
.n_value
;
1406 if (next_file_string_table_offset
< file_string_table_offset
)
1407 error (_("string table offset backs up at %d"), symnum
);
1408 /* FIXME -- replace error() with complaint. */
1413 /* Lots of symbol types we can just ignore. */
1420 /* Keep going . . . */
1423 * Special symbol types for GNU
1426 case N_INDR
| N_EXT
:
1428 case N_SETA
| N_EXT
:
1430 case N_SETT
| N_EXT
:
1432 case N_SETD
| N_EXT
:
1434 case N_SETB
| N_EXT
:
1445 static int prev_so_symnum
= -10;
1446 static int first_so_symnum
;
1448 static char *dirname_nso
;
1449 int prev_textlow_not_set
;
1451 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1452 SECT_OFF_TEXT (objfile
));
1454 prev_textlow_not_set
= textlow_not_set
;
1456 /* A zero value is probably an indication for the SunPRO 3.0
1457 compiler. dbx_end_psymtab explicitly tests for zero, so
1458 don't relocate it. */
1460 if (nlist
.n_value
== 0
1461 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1463 textlow_not_set
= 1;
1467 textlow_not_set
= 0;
1469 past_first_source_file
= 1;
1471 if (prev_so_symnum
!= symnum
- 1)
1472 { /* Here if prev stab wasn't N_SO. */
1473 first_so_symnum
= symnum
;
1477 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
,
1478 includes_used
, symnum
* symbol_size
,
1479 valu
> pst
->texthigh
1480 ? valu
: pst
->texthigh
,
1481 dependency_list
, dependencies_used
,
1482 prev_textlow_not_set
);
1483 pst
= (struct partial_symtab
*) 0;
1485 dependencies_used
= 0;
1486 has_line_numbers
= 0;
1490 prev_so_symnum
= symnum
;
1492 /* End the current partial symtab and start a new one. */
1494 namestring
= set_namestring (objfile
, &nlist
);
1496 /* Null name means end of .o file. Don't start a new one. */
1497 if (*namestring
== '\000')
1500 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1501 The first one is a directory name; the second the file name.
1502 If pst exists, is empty, and has a filename ending in '/',
1503 we assume the previous N_SO was a directory name. */
1505 p
= lbasename (namestring
);
1506 if (p
!= namestring
&& *p
== '\000')
1508 /* Save the directory name SOs locally, then save it into
1509 the psymtab when it's created below. */
1510 dirname_nso
= namestring
;
1514 /* Some other compilers (C++ ones in particular) emit useless
1515 SOs for non-existant .c files. We ignore all subsequent SOs
1516 that immediately follow the first. */
1520 pst
= start_psymtab (objfile
,
1522 first_so_symnum
* symbol_size
,
1523 objfile
->global_psymbols
.next
,
1524 objfile
->static_psymbols
.next
);
1525 pst
->dirname
= dirname_nso
;
1533 enum language tmp_language
;
1535 /* Add this bincl to the bincl_list for future EXCLs. No
1536 need to save the string; it'll be around until
1537 read_dbx_symtab function returns. */
1539 namestring
= set_namestring (objfile
, &nlist
);
1540 tmp_language
= deduce_language_from_filename (namestring
);
1542 /* Only change the psymtab's language if we've learned
1543 something useful (eg. tmp_language is not language_unknown).
1544 In addition, to match what start_subfile does, never change
1546 if (tmp_language
!= language_unknown
1547 && (tmp_language
!= language_c
1548 || psymtab_language
!= language_cplus
))
1549 psymtab_language
= tmp_language
;
1553 /* FIXME: we should not get here without a PST to work on.
1554 Attempt to recover. */
1555 complaint (&symfile_complaints
,
1556 _("N_BINCL %s not in entries for "
1557 "any file, at symtab pos %d"),
1558 namestring
, symnum
);
1561 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1563 /* Mark down an include file in the current psymtab. */
1565 goto record_include_file
;
1570 enum language tmp_language
;
1572 /* Mark down an include file in the current psymtab. */
1573 namestring
= set_namestring (objfile
, &nlist
);
1574 tmp_language
= deduce_language_from_filename (namestring
);
1576 /* Only change the psymtab's language if we've learned
1577 something useful (eg. tmp_language is not language_unknown).
1578 In addition, to match what start_subfile does, never change
1580 if (tmp_language
!= language_unknown
1581 && (tmp_language
!= language_c
1582 || psymtab_language
!= language_cplus
))
1583 psymtab_language
= tmp_language
;
1585 /* In C++, one may expect the same filename to come round many
1586 times, when code is coming alternately from the main file
1587 and from inline functions in other files. So I check to see
1588 if this is a file we've seen before -- either the main
1589 source file, or a previously included file.
1591 This seems to be a lot of time to be spending on N_SOL, but
1592 things like "break c-exp.y:435" need to work (I
1593 suppose the psymtab_include_list could be hashed or put
1594 in a binary tree, if profiling shows this is a major hog). */
1595 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
1600 for (i
= 0; i
< includes_used
; i
++)
1601 if (filename_cmp (namestring
, psymtab_include_list
[i
]) == 0)
1610 record_include_file
:
1612 psymtab_include_list
[includes_used
++] = namestring
;
1613 if (includes_used
>= includes_allocated
)
1615 const char **orig
= psymtab_include_list
;
1617 psymtab_include_list
= (const char **)
1618 alloca ((includes_allocated
*= 2) * sizeof (const char *));
1619 memcpy (psymtab_include_list
, orig
,
1620 includes_used
* sizeof (const char *));
1624 case N_LSYM
: /* Typedef or automatic variable. */
1625 case N_STSYM
: /* Data seg var -- static. */
1626 case N_LCSYM
: /* BSS " */
1627 case N_ROSYM
: /* Read-only data seg var -- static. */
1628 case N_NBSTS
: /* Gould nobase. */
1629 case N_NBLCS
: /* symbols. */
1631 case N_GSYM
: /* Global (extern) variable; can be
1632 data or bss (sigh FIXME). */
1634 /* Following may probably be ignored; I'll leave them here
1635 for now (until I do Pascal and Modula 2 extensions). */
1637 case N_PC
: /* I may or may not need this; I
1639 case N_M2C
: /* I suspect that I can ignore this here. */
1640 case N_SCOPE
: /* Same. */
1644 namestring
= set_namestring (objfile
, &nlist
);
1646 /* See if this is an end of function stab. */
1647 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1651 /* It's value is the size (in bytes) of the function for
1652 function relative stabs, or the address of the function's
1653 end for old style stabs. */
1654 valu
= nlist
.n_value
+ last_function_start
;
1655 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1656 pst
->texthigh
= valu
;
1660 p
= (char *) strchr (namestring
, ':');
1662 continue; /* Not a debugging symbol. */
1665 sym_name
= NULL
; /* pacify "gcc -Werror" */
1666 if (psymtab_language
== language_cplus
)
1668 char *new_name
, *name
= xmalloc (p
- namestring
+ 1);
1669 memcpy (name
, namestring
, p
- namestring
);
1671 name
[p
- namestring
] = '\0';
1672 new_name
= cp_canonicalize_string (name
);
1673 if (new_name
!= NULL
)
1675 sym_len
= strlen (new_name
);
1676 sym_name
= obstack_copy0 (&objfile
->objfile_obstack
,
1685 sym_name
= namestring
;
1686 sym_len
= p
- namestring
;
1689 /* Main processing section for debugging symbols which
1690 the initial read through the symbol tables needs to worry
1691 about. If we reach this point, the symbol which we are
1692 considering is definitely one we are interested in.
1693 p must also contain the (valid) index into the namestring
1694 which indicates the debugging type symbol. */
1699 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1702 if (gdbarch_static_transform_name_p (gdbarch
))
1703 gdbarch_static_transform_name (gdbarch
, namestring
);
1705 add_psymbol_to_list (sym_name
, sym_len
, 1,
1706 VAR_DOMAIN
, LOC_STATIC
,
1707 &objfile
->static_psymbols
,
1708 nlist
.n_value
, psymtab_language
, objfile
);
1712 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1714 /* The addresses in these entries are reported to be
1715 wrong. See the code that reads 'G's for symtabs. */
1716 add_psymbol_to_list (sym_name
, sym_len
, 1,
1717 VAR_DOMAIN
, LOC_STATIC
,
1718 &objfile
->global_psymbols
,
1719 nlist
.n_value
, psymtab_language
, objfile
);
1723 /* When a 'T' entry is defining an anonymous enum, it
1724 may have a name which is the empty string, or a
1725 single space. Since they're not really defining a
1726 symbol, those shouldn't go in the partial symbol
1727 table. We do pick up the elements of such enums at
1728 'check_enum:', below. */
1729 if (p
>= namestring
+ 2
1730 || (p
== namestring
+ 1
1731 && namestring
[0] != ' '))
1733 add_psymbol_to_list (sym_name
, sym_len
, 1,
1734 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1735 &objfile
->static_psymbols
,
1736 0, psymtab_language
, objfile
);
1739 /* Also a typedef with the same name. */
1740 add_psymbol_to_list (sym_name
, sym_len
, 1,
1741 VAR_DOMAIN
, LOC_TYPEDEF
,
1742 &objfile
->static_psymbols
,
1743 0, psymtab_language
, objfile
);
1750 if (p
!= namestring
) /* a name is there, not just :T... */
1752 add_psymbol_to_list (sym_name
, sym_len
, 1,
1753 VAR_DOMAIN
, LOC_TYPEDEF
,
1754 &objfile
->static_psymbols
,
1755 0, psymtab_language
, objfile
);
1758 /* If this is an enumerated type, we need to
1759 add all the enum constants to the partial symbol
1760 table. This does not cover enums without names, e.g.
1761 "enum {a, b} c;" in C, but fortunately those are
1762 rare. There is no way for GDB to find those from the
1763 enum type without spending too much time on it. Thus
1764 to solve this problem, the compiler needs to put out the
1765 enum in a nameless type. GCC2 does this. */
1767 /* We are looking for something of the form
1768 <name> ":" ("t" | "T") [<number> "="] "e"
1769 {<constant> ":" <value> ","} ";". */
1771 /* Skip over the colon and the 't' or 'T'. */
1773 /* This type may be given a number. Also, numbers can come
1774 in pairs like (0,26). Skip over it. */
1775 while ((*p
>= '0' && *p
<= '9')
1776 || *p
== '(' || *p
== ',' || *p
== ')'
1782 /* The aix4 compiler emits extra crud before the members. */
1785 /* Skip over the type (?). */
1789 /* Skip over the colon. */
1793 /* We have found an enumerated type. */
1794 /* According to comments in read_enum_type
1795 a comma could end it instead of a semicolon.
1796 I don't know where that happens.
1798 while (*p
&& *p
!= ';' && *p
!= ',')
1802 /* Check for and handle cretinous dbx symbol name
1804 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1805 p
= next_symbol_text (objfile
);
1807 /* Point to the character after the name
1808 of the enum constant. */
1809 for (q
= p
; *q
&& *q
!= ':'; q
++)
1811 /* Note that the value doesn't matter for
1812 enum constants in psymtabs, just in symtabs. */
1813 add_psymbol_to_list (p
, q
- p
, 1,
1814 VAR_DOMAIN
, LOC_CONST
,
1815 &objfile
->static_psymbols
, 0,
1816 psymtab_language
, objfile
);
1817 /* Point past the name. */
1819 /* Skip over the value. */
1820 while (*p
&& *p
!= ',')
1822 /* Advance past the comma. */
1830 /* Constant, e.g. from "const" in Pascal. */
1831 add_psymbol_to_list (sym_name
, sym_len
, 1,
1832 VAR_DOMAIN
, LOC_CONST
,
1833 &objfile
->static_psymbols
, 0,
1834 psymtab_language
, objfile
);
1840 int name_len
= p
- namestring
;
1841 char *name
= xmalloc (name_len
+ 1);
1843 memcpy (name
, namestring
, name_len
);
1844 name
[name_len
] = '\0';
1845 function_outside_compilation_unit_complaint (name
);
1848 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1849 SECT_OFF_TEXT (objfile
));
1850 /* Kludges for ELF/STABS with Sun ACC. */
1851 last_function_name
= namestring
;
1852 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1853 value for the bottom of the text seg in those cases. */
1854 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1855 SECT_OFF_TEXT (objfile
))
1856 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1858 CORE_ADDR minsym_valu
=
1859 find_stab_function_addr (namestring
,
1860 pst
? pst
->filename
: NULL
,
1863 /* find_stab_function_addr will return 0 if the minimal
1864 symbol wasn't found. (Unfortunately, this might also
1865 be a valid address.) Anyway, if it *does* return 0,
1866 it is likely that the value was set correctly to begin
1868 if (minsym_valu
!= 0)
1869 nlist
.n_value
= minsym_valu
;
1871 if (pst
&& textlow_not_set
1872 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1874 pst
->textlow
= nlist
.n_value
;
1875 textlow_not_set
= 0;
1879 /* Keep track of the start of the last function so we
1880 can handle end of function symbols. */
1881 last_function_start
= nlist
.n_value
;
1883 /* In reordered executables this function may lie outside
1884 the bounds created by N_SO symbols. If that's the case
1885 use the address of this function as the low bound for
1886 the partial symbol table. */
1889 || (nlist
.n_value
< pst
->textlow
1891 != ANOFFSET (objfile
->section_offsets
,
1892 SECT_OFF_TEXT (objfile
))))))
1894 pst
->textlow
= nlist
.n_value
;
1895 textlow_not_set
= 0;
1897 add_psymbol_to_list (sym_name
, sym_len
, 1,
1898 VAR_DOMAIN
, LOC_BLOCK
,
1899 &objfile
->static_psymbols
,
1900 nlist
.n_value
, psymtab_language
, objfile
);
1903 /* Global functions were ignored here, but now they
1904 are put into the global psymtab like one would expect.
1905 They're also in the minimal symbol table. */
1909 int name_len
= p
- namestring
;
1910 char *name
= xmalloc (name_len
+ 1);
1912 memcpy (name
, namestring
, name_len
);
1913 name
[name_len
] = '\0';
1914 function_outside_compilation_unit_complaint (name
);
1917 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1918 SECT_OFF_TEXT (objfile
));
1919 /* Kludges for ELF/STABS with Sun ACC. */
1920 last_function_name
= namestring
;
1921 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1922 value for the bottom of the text seg in those cases. */
1923 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1924 SECT_OFF_TEXT (objfile
))
1925 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1927 CORE_ADDR minsym_valu
=
1928 find_stab_function_addr (namestring
,
1929 pst
? pst
->filename
: NULL
,
1932 /* find_stab_function_addr will return 0 if the minimal
1933 symbol wasn't found. (Unfortunately, this might also
1934 be a valid address.) Anyway, if it *does* return 0,
1935 it is likely that the value was set correctly to begin
1937 if (minsym_valu
!= 0)
1938 nlist
.n_value
= minsym_valu
;
1940 if (pst
&& textlow_not_set
1941 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1943 pst
->textlow
= nlist
.n_value
;
1944 textlow_not_set
= 0;
1948 /* Keep track of the start of the last function so we
1949 can handle end of function symbols. */
1950 last_function_start
= nlist
.n_value
;
1952 /* In reordered executables this function may lie outside
1953 the bounds created by N_SO symbols. If that's the case
1954 use the address of this function as the low bound for
1955 the partial symbol table. */
1958 || (nlist
.n_value
< pst
->textlow
1960 != ANOFFSET (objfile
->section_offsets
,
1961 SECT_OFF_TEXT (objfile
))))))
1963 pst
->textlow
= nlist
.n_value
;
1964 textlow_not_set
= 0;
1966 add_psymbol_to_list (sym_name
, sym_len
, 1,
1967 VAR_DOMAIN
, LOC_BLOCK
,
1968 &objfile
->global_psymbols
,
1969 nlist
.n_value
, psymtab_language
, objfile
);
1972 /* Two things show up here (hopefully); static symbols of
1973 local scope (static used inside braces) or extensions
1974 of structure symbols. We can ignore both. */
1988 case '#': /* For symbol identification (used in live ranges). */
1992 /* It is a C++ nested symbol. We don't need to record it
1993 (I don't think); if we try to look up foo::bar::baz,
1994 then symbols for the symtab containing foo should get
1995 read in, I think. */
1996 /* Someone says sun cc puts out symbols like
1997 /foo/baz/maclib::/usr/local/bin/maclib,
1998 which would get here with a symbol type of ':'. */
2002 /* Unexpected symbol descriptor. The second and subsequent stabs
2003 of a continued stab can show up here. The question is
2004 whether they ever can mimic a normal stab--it would be
2005 nice if not, since we certainly don't want to spend the
2006 time searching to the end of every string looking for
2009 complaint (&symfile_complaints
,
2010 _("unknown symbol descriptor `%c'"),
2013 /* Ignore it; perhaps it is an extension that we don't
2021 namestring
= set_namestring (objfile
, &nlist
);
2023 /* Find the corresponding bincl and mark that psymtab on the
2024 psymtab dependency list. */
2026 struct partial_symtab
*needed_pst
=
2027 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2029 /* If this include file was defined earlier in this file,
2031 if (needed_pst
== pst
)
2039 for (i
= 0; i
< dependencies_used
; i
++)
2040 if (dependency_list
[i
] == needed_pst
)
2046 /* If it's already in the list, skip the rest. */
2050 dependency_list
[dependencies_used
++] = needed_pst
;
2051 if (dependencies_used
>= dependencies_allocated
)
2053 struct partial_symtab
**orig
= dependency_list
;
2056 (struct partial_symtab
**)
2057 alloca ((dependencies_allocated
*= 2)
2058 * sizeof (struct partial_symtab
*));
2059 memcpy (dependency_list
, orig
,
2061 * sizeof (struct partial_symtab
*)));
2063 fprintf_unfiltered (gdb_stderr
,
2064 "Had to reallocate "
2065 "dependency list.\n");
2066 fprintf_unfiltered (gdb_stderr
,
2067 "New dependencies allocated: %d\n",
2068 dependencies_allocated
);
2076 /* Solaris 2 end of module, finish current partial symbol table.
2077 dbx_end_psymtab will set pst->texthigh to the proper value, which
2078 is necessary if a module compiled without debugging info
2079 follows this module. */
2080 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
2082 dbx_end_psymtab (objfile
, pst
,
2083 psymtab_include_list
, includes_used
,
2084 symnum
* symbol_size
,
2085 (CORE_ADDR
) 0, dependency_list
,
2086 dependencies_used
, textlow_not_set
);
2087 pst
= (struct partial_symtab
*) 0;
2089 dependencies_used
= 0;
2090 has_line_numbers
= 0;
2096 HANDLE_RBRAC (nlist
.n_value
);
2102 case N_SSYM
: /* Claim: Structure or union element.
2103 Hopefully, I can ignore this. */
2104 case N_ENTRY
: /* Alternate entry point; can ignore. */
2105 case N_MAIN
: /* Can definitely ignore this. */
2106 case N_CATCH
: /* These are GNU C++ extensions */
2107 case N_EHDECL
: /* that can safely be ignored here. */
2119 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2120 case N_DEFD
: /* GNU Modula-2 */
2121 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2123 case N_OBJ
: /* Useless types from Solaris. */
2126 /* These symbols aren't interesting; don't worry about them. */
2130 /* If we haven't found it yet, ignore it. It's probably some
2131 new type we don't know about yet. */
2132 unknown_symtype_complaint (hex_string (nlist
.n_type
));
2137 /* If there's stuff to be cleaned up, clean it up. */
2140 /* Don't set pst->texthigh lower than it already is. */
2141 CORE_ADDR text_end
=
2142 (lowest_text_address
== (CORE_ADDR
) -1
2143 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
2144 SECT_OFF_TEXT (objfile
)))
2145 : lowest_text_address
)
2148 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2149 symnum
* symbol_size
,
2150 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2151 dependency_list
, dependencies_used
, textlow_not_set
);
2154 do_cleanups (back_to
);
2157 /* Allocate and partially fill a partial symtab. It will be
2158 completely filled at the end of the symbol list.
2160 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2161 is the address relative to which its symbols are (incremental) or 0
2164 static struct partial_symtab
*
2165 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2166 int ldsymoff
, struct partial_symbol
**global_syms
,
2167 struct partial_symbol
**static_syms
)
2169 struct partial_symtab
*result
=
2170 start_psymtab_common (objfile
, filename
, textlow
,
2171 global_syms
, static_syms
);
2173 result
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2174 sizeof (struct symloc
));
2175 LDSYMOFF (result
) = ldsymoff
;
2176 result
->read_symtab
= dbx_read_symtab
;
2177 SYMBOL_SIZE (result
) = symbol_size
;
2178 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2179 STRING_OFFSET (result
) = string_table_offset
;
2180 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2182 /* Deduce the source language from the filename for this psymtab. */
2183 psymtab_language
= deduce_language_from_filename (filename
);
2188 /* Close off the current usage of PST.
2189 Returns PST or NULL if the partial symtab was empty and thrown away.
2191 FIXME: List variables and peculiarities of same. */
2193 struct partial_symtab
*
2194 dbx_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2195 const char **include_list
, int num_includes
,
2196 int capping_symbol_offset
, CORE_ADDR capping_text
,
2197 struct partial_symtab
**dependency_list
,
2198 int number_dependencies
,
2199 int textlow_not_set
)
2202 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2204 if (capping_symbol_offset
!= -1)
2205 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2206 pst
->texthigh
= capping_text
;
2208 /* Under Solaris, the N_SO symbols always have a value of 0,
2209 instead of the usual address of the .o file. Therefore,
2210 we have to do some tricks to fill in texthigh and textlow.
2211 The first trick is: if we see a static
2212 or global function, and the textlow for the current pst
2213 is not set (ie: textlow_not_set), then we use that function's
2214 address for the textlow of the pst. */
2216 /* Now, to fill in texthigh, we remember the last function seen
2217 in the .o file. Also, there's a hack in
2218 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2219 to here via the misc_info field. Therefore, we can fill in
2220 a reliable texthigh by taking the address plus size of the
2221 last function in the file. */
2223 if (pst
->texthigh
== 0 && last_function_name
2224 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2228 struct bound_minimal_symbol minsym
;
2230 p
= strchr (last_function_name
, ':');
2232 p
= last_function_name
;
2233 n
= p
- last_function_name
;
2235 strncpy (p
, last_function_name
, n
);
2238 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2239 if (minsym
.minsym
== NULL
)
2241 /* Sun Fortran appends an underscore to the minimal symbol name,
2242 try again with an appended underscore if the minimal symbol
2246 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2250 pst
->texthigh
= (BMSYMBOL_VALUE_ADDRESS (minsym
)
2251 + MSYMBOL_SIZE (minsym
.minsym
));
2253 last_function_name
= NULL
;
2256 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2258 /* This test will be true if the last .o file is only data. */
2259 else if (textlow_not_set
)
2260 pst
->textlow
= pst
->texthigh
;
2263 struct partial_symtab
*p1
;
2265 /* If we know our own starting text address, then walk through all other
2266 psymtabs for this objfile, and if any didn't know their ending text
2267 address, set it to our starting address. Take care to not set our
2268 own ending address to our starting address, nor to set addresses on
2269 `dependency' files that have both textlow and texthigh zero. */
2271 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2273 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2275 p1
->texthigh
= pst
->textlow
;
2276 /* If this file has only data, then make textlow match
2278 if (p1
->textlow
== 0)
2279 p1
->textlow
= p1
->texthigh
;
2284 /* End of kludge for patching Solaris textlow and texthigh. */
2286 end_psymtab_common (objfile
, pst
);
2288 pst
->number_of_dependencies
= number_dependencies
;
2289 if (number_dependencies
)
2291 pst
->dependencies
= (struct partial_symtab
**)
2292 obstack_alloc (&objfile
->objfile_obstack
,
2293 number_dependencies
* sizeof (struct partial_symtab
*));
2294 memcpy (pst
->dependencies
, dependency_list
,
2295 number_dependencies
* sizeof (struct partial_symtab
*));
2298 pst
->dependencies
= 0;
2300 for (i
= 0; i
< num_includes
; i
++)
2302 struct partial_symtab
*subpst
=
2303 allocate_psymtab (include_list
[i
], objfile
);
2305 subpst
->read_symtab_private
=
2306 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
2310 subpst
->texthigh
= 0;
2312 /* We could save slight bits of space by only making one of these,
2313 shared by the entire set of include files. FIXME-someday. */
2314 subpst
->dependencies
= (struct partial_symtab
**)
2315 obstack_alloc (&objfile
->objfile_obstack
,
2316 sizeof (struct partial_symtab
*));
2317 subpst
->dependencies
[0] = pst
;
2318 subpst
->number_of_dependencies
= 1;
2320 subpst
->globals_offset
=
2321 subpst
->n_global_syms
=
2322 subpst
->statics_offset
=
2323 subpst
->n_static_syms
= 0;
2326 subpst
->compunit_symtab
= 0;
2327 subpst
->read_symtab
= pst
->read_symtab
;
2330 if (num_includes
== 0
2331 && number_dependencies
== 0
2332 && pst
->n_global_syms
== 0
2333 && pst
->n_static_syms
== 0
2334 && has_line_numbers
== 0)
2336 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2337 it is on the obstack, but we can forget to chain it on the list. */
2338 /* Empty psymtabs happen as a result of header files which don't have
2339 any symbols in them. There can be a lot of them. But this check
2340 is wrong, in that a psymtab with N_SLINE entries but nothing else
2341 is not empty, but we don't realize that. Fixing that without slowing
2342 things down might be tricky. */
2344 discard_psymtab (objfile
, pst
);
2346 /* Indicate that psymtab was thrown away. */
2347 pst
= (struct partial_symtab
*) NULL
;
2353 dbx_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
2355 struct cleanup
*old_chain
;
2360 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2361 "Shouldn't happen.\n",
2366 /* Read in all partial symtabs on which this one is dependent. */
2367 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2368 if (!pst
->dependencies
[i
]->readin
)
2370 /* Inform about additional files that need to be read in. */
2373 fputs_filtered (" ", gdb_stdout
);
2375 fputs_filtered ("and ", gdb_stdout
);
2377 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2378 wrap_here (""); /* Flush output. */
2379 gdb_flush (gdb_stdout
);
2381 dbx_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
2384 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2386 /* Init stuff necessary for reading in symbols */
2389 old_chain
= make_cleanup (really_free_pendings
, 0);
2390 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2391 symbol_size
= SYMBOL_SIZE (pst
);
2393 /* Read in this file's symbols. */
2394 bfd_seek (objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2395 read_ofile_symtab (objfile
, pst
);
2397 do_cleanups (old_chain
);
2403 /* Read in all of the symbols for a given psymtab for real.
2404 Be verbose about it if the user wants that. SELF is not NULL. */
2407 dbx_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
2413 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2414 "Shouldn't happen.\n",
2419 if (LDSYMLEN (self
) || self
->number_of_dependencies
)
2421 struct cleanup
*back_to
;
2423 /* Print the message now, before reading the string table,
2424 to avoid disconcerting pauses. */
2427 printf_filtered ("Reading in symbols for %s...", self
->filename
);
2428 gdb_flush (gdb_stdout
);
2431 sym_bfd
= objfile
->obfd
;
2433 next_symbol_text_func
= dbx_next_symbol_text
;
2435 back_to
= make_cleanup (null_cleanup
, NULL
);
2437 if (DBX_STAB_SECTION (objfile
))
2440 = symfile_relocate_debug_section (objfile
,
2441 DBX_STAB_SECTION (objfile
),
2445 make_cleanup (free_current_contents
, (void *) &stabs_data
);
2448 dbx_psymtab_to_symtab_1 (objfile
, self
);
2450 do_cleanups (back_to
);
2452 /* Match with global symbols. This only needs to be done once,
2453 after all of the symtabs and dependencies have been read in. */
2454 scan_file_globals (objfile
);
2456 /* Finish up the debug error message. */
2458 printf_filtered ("done.\n");
2462 /* Read in a defined section of a specific object file's symbols. */
2465 read_ofile_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
2468 struct external_nlist
*bufp
;
2469 struct internal_nlist nlist
;
2471 unsigned max_symnum
;
2473 int sym_offset
; /* Offset to start of symbols to read */
2474 int sym_size
; /* Size of symbols to read */
2475 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2476 int text_size
; /* Size of text segment for symbols */
2477 struct section_offsets
*section_offsets
;
2479 sym_offset
= LDSYMOFF (pst
);
2480 sym_size
= LDSYMLEN (pst
);
2481 text_offset
= pst
->textlow
;
2482 text_size
= pst
->texthigh
- pst
->textlow
;
2483 section_offsets
= objfile
->section_offsets
;
2485 dbxread_objfile
= objfile
;
2487 stringtab_global
= DBX_STRINGTAB (objfile
);
2488 set_last_source_file (NULL
);
2490 abfd
= objfile
->obfd
;
2491 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2492 symbuf_end
= symbuf_idx
= 0;
2494 symbuf_left
= sym_offset
+ sym_size
;
2496 /* It is necessary to actually read one symbol *before* the start
2497 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2498 occurs before the N_SO symbol.
2500 Detecting this in read_dbx_symtab
2501 would slow down initial readin, so we look for it here instead. */
2502 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2504 stabs_seek (sym_offset
- symbol_size
);
2506 bufp
= &symbuf
[symbuf_idx
++];
2507 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2508 OBJSTAT (objfile
, n_stabs
++);
2510 namestring
= set_namestring (objfile
, &nlist
);
2512 processing_gcc_compilation
= 0;
2513 if (nlist
.n_type
== N_TEXT
)
2515 const char *tempstring
= namestring
;
2517 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2518 processing_gcc_compilation
= 1;
2519 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2520 processing_gcc_compilation
= 2;
2521 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2523 if (startswith (tempstring
, "__gnu_compiled"))
2524 processing_gcc_compilation
= 2;
2529 /* The N_SO starting this symtab is the first symbol, so we
2530 better not check the symbol before it. I'm not this can
2531 happen, but it doesn't hurt to check for it. */
2532 stabs_seek (sym_offset
);
2533 processing_gcc_compilation
= 0;
2536 if (symbuf_idx
== symbuf_end
)
2538 bufp
= &symbuf
[symbuf_idx
];
2539 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2540 error (_("First symbol in segment of executable not a source symbol"));
2542 max_symnum
= sym_size
/ symbol_size
;
2545 symnum
< max_symnum
;
2548 QUIT
; /* Allow this to be interruptable. */
2549 if (symbuf_idx
== symbuf_end
)
2551 bufp
= &symbuf
[symbuf_idx
++];
2552 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2553 OBJSTAT (objfile
, n_stabs
++);
2555 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2557 namestring
= set_namestring (objfile
, &nlist
);
2561 if (sizeof (nlist
.n_value
) > 4
2562 /* We are a 64-bit debugger debugging a 32-bit program. */
2563 && (type
== N_LSYM
|| type
== N_PSYM
))
2564 /* We have to be careful with the n_value in the case of N_LSYM
2565 and N_PSYM entries, because they are signed offsets from frame
2566 pointer, but we actually read them as unsigned 32-bit values.
2567 This is not a problem for 32-bit debuggers, for which negative
2568 values end up being interpreted correctly (as negative
2569 offsets) due to integer overflow.
2570 But we need to sign-extend the value for 64-bit debuggers,
2571 or we'll end up interpreting negative values as very large
2572 positive offsets. */
2573 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2574 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2575 namestring
, section_offsets
, objfile
);
2577 /* We skip checking for a new .o or -l file; that should never
2578 happen in this routine. */
2579 else if (type
== N_TEXT
)
2581 /* I don't think this code will ever be executed, because
2582 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2583 the N_SO symbol which starts this source file.
2584 However, there is no reason not to accept
2585 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2587 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2588 processing_gcc_compilation
= 1;
2589 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2590 processing_gcc_compilation
= 2;
2592 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2593 || type
== (unsigned char) N_NBTEXT
)
2595 /* Global symbol: see if we came across a dbx defintion for
2596 a corresponding symbol. If so, store the value. Remove
2597 syms from the chain when their values are stored, but
2598 search the whole chain, as there may be several syms from
2599 different files with the same name. */
2600 /* This is probably not true. Since the files will be read
2601 in one at a time, each reference to a global symbol will
2602 be satisfied in each file as it appears. So we skip this
2608 /* In a Solaris elf file, this variable, which comes from the
2609 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2610 which comes from pst->textlow is correct. */
2611 if (last_source_start_addr
== 0)
2612 last_source_start_addr
= text_offset
;
2614 /* In reordered executables last_source_start_addr may not be the
2615 lower bound for this symtab, instead use text_offset which comes
2616 from pst->textlow which is correct. */
2617 if (last_source_start_addr
> text_offset
)
2618 last_source_start_addr
= text_offset
;
2620 pst
->compunit_symtab
= end_symtab (text_offset
+ text_size
,
2621 SECT_OFF_TEXT (objfile
));
2625 dbxread_objfile
= NULL
;
2629 /* Record the namespace that the function defined by SYMBOL was
2630 defined in, if necessary. BLOCK is the associated block; use
2631 OBSTACK for allocation. */
2634 cp_set_block_scope (const struct symbol
*symbol
,
2635 struct block
*block
,
2636 struct obstack
*obstack
)
2638 if (SYMBOL_DEMANGLED_NAME (symbol
) != NULL
)
2640 /* Try to figure out the appropriate namespace from the
2643 /* FIXME: carlton/2003-04-15: If the function in question is
2644 a method of a class, the name will actually include the
2645 name of the class as well. This should be harmless, but
2646 is a little unfortunate. */
2648 const char *name
= SYMBOL_DEMANGLED_NAME (symbol
);
2649 unsigned int prefix_len
= cp_entire_prefix_len (name
);
2651 block_set_scope (block
,
2652 obstack_copy0 (obstack
, name
, prefix_len
),
2657 /* This handles a single symbol from the symbol-file, building symbols
2658 into a GDB symtab. It takes these arguments and an implicit argument.
2660 TYPE is the type field of the ".stab" symbol entry.
2661 DESC is the desc field of the ".stab" entry.
2662 VALU is the value field of the ".stab" entry.
2663 NAME is the symbol name, in our address space.
2664 SECTION_OFFSETS is a set of amounts by which the sections of this
2665 object file were relocated when it was loaded into memory. Note
2666 that these section_offsets are not the objfile->section_offsets but
2667 the pst->section_offsets. All symbols that refer to memory
2668 locations need to be offset by these amounts.
2669 OBJFILE is the object file from which we are reading symbols. It
2670 is used in end_symtab. */
2673 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2674 const struct section_offsets
*section_offsets
,
2675 struct objfile
*objfile
)
2677 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2678 struct context_stack
*newobj
;
2679 /* This remembers the address of the start of a function. It is
2680 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2681 are relative to the current function's start address. On systems
2682 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2683 and is used to relocate these symbol types rather than
2685 static CORE_ADDR function_start_offset
;
2687 /* This holds the address of the start of a function, without the
2688 system peculiarities of function_start_offset. */
2689 static CORE_ADDR last_function_start
;
2691 /* If this is nonzero, we've seen an N_SLINE since the start of the
2692 current function. We use this to tell us to move the first sline
2693 to the beginning of the function regardless of what its given
2695 static int sline_found_in_function
= 1;
2697 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2698 source file. Used to detect the SunPRO solaris compiler. */
2699 static int n_opt_found
;
2701 /* The stab type used for the definition of the last function.
2702 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2703 static int function_stab_type
= 0;
2705 if (!block_address_function_relative
)
2707 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2708 function start address, so just use the text offset. */
2709 function_start_offset
=
2710 ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2713 /* Something is wrong if we see real data before seeing a source
2716 if (get_last_source_file () == NULL
&& type
!= (unsigned char) N_SO
)
2718 /* Ignore any symbols which appear before an N_SO symbol.
2719 Currently no one puts symbols there, but we should deal
2720 gracefully with the case. A complain()t might be in order,
2721 but this should not be an error (). */
2730 if (*name
== '\000')
2732 /* This N_FUN marks the end of a function. This closes off
2733 the current block. */
2734 struct block
*block
;
2736 if (context_stack_depth
<= 0)
2738 lbrac_mismatch_complaint (symnum
);
2742 /* The following check is added before recording line 0 at
2743 end of function so as to handle hand-generated stabs
2744 which may have an N_FUN stabs at the end of the function,
2745 but no N_SLINE stabs. */
2746 if (sline_found_in_function
)
2748 CORE_ADDR addr
= last_function_start
+ valu
;
2750 record_line (current_subfile
, 0,
2751 gdbarch_addr_bits_remove (gdbarch
, addr
));
2754 within_function
= 0;
2755 newobj
= pop_context ();
2757 /* Make a block for the local symbols within. */
2758 block
= finish_block (newobj
->name
, &local_symbols
,
2760 newobj
->start_addr
, newobj
->start_addr
+ valu
);
2762 /* For C++, set the block's scope. */
2763 if (SYMBOL_LANGUAGE (newobj
->name
) == language_cplus
)
2764 cp_set_block_scope (newobj
->name
, block
, &objfile
->objfile_obstack
);
2766 /* May be switching to an assembler file which may not be using
2767 block relative stabs, so reset the offset. */
2768 if (block_address_function_relative
)
2769 function_start_offset
= 0;
2774 sline_found_in_function
= 0;
2776 /* Relocate for dynamic loading. */
2777 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2778 valu
= gdbarch_addr_bits_remove (gdbarch
, valu
);
2779 last_function_start
= valu
;
2781 goto define_a_symbol
;
2784 /* This "symbol" just indicates the start of an inner lexical
2785 context within a function. */
2787 /* Ignore extra outermost context from SunPRO cc and acc. */
2788 if (n_opt_found
&& desc
== 1)
2791 if (block_address_function_relative
)
2792 /* Relocate for Sun ELF acc fn-relative syms. */
2793 valu
+= function_start_offset
;
2795 /* On most machines, the block addresses are relative to the
2796 N_SO, the linker did not relocate them (sigh). */
2797 valu
+= last_source_start_addr
;
2799 push_context (desc
, valu
);
2803 /* This "symbol" just indicates the end of an inner lexical
2804 context that was started with N_LBRAC. */
2806 /* Ignore extra outermost context from SunPRO cc and acc. */
2807 if (n_opt_found
&& desc
== 1)
2810 if (block_address_function_relative
)
2811 /* Relocate for Sun ELF acc fn-relative syms. */
2812 valu
+= function_start_offset
;
2814 /* On most machines, the block addresses are relative to the
2815 N_SO, the linker did not relocate them (sigh). */
2816 valu
+= last_source_start_addr
;
2818 if (context_stack_depth
<= 0)
2820 lbrac_mismatch_complaint (symnum
);
2824 newobj
= pop_context ();
2825 if (desc
!= newobj
->depth
)
2826 lbrac_mismatch_complaint (symnum
);
2828 if (local_symbols
!= NULL
)
2830 /* GCC development snapshots from March to December of
2831 2000 would output N_LSYM entries after N_LBRAC
2832 entries. As a consequence, these symbols are simply
2833 discarded. Complain if this is the case. */
2834 complaint (&symfile_complaints
,
2835 _("misplaced N_LBRAC entry; discarding local "
2836 "symbols which have no enclosing block"));
2838 local_symbols
= newobj
->locals
;
2840 if (context_stack_depth
> 1)
2842 /* This is not the outermost LBRAC...RBRAC pair in the
2843 function, its local symbols preceded it, and are the ones
2844 just recovered from the context stack. Define the block
2845 for them (but don't bother if the block contains no
2846 symbols. Should we complain on blocks without symbols?
2847 I can't think of any useful purpose for them). */
2848 if (local_symbols
!= NULL
)
2850 /* Muzzle a compiler bug that makes end < start.
2852 ??? Which compilers? Is this ever harmful?. */
2853 if (newobj
->start_addr
> valu
)
2855 complaint (&symfile_complaints
,
2856 _("block start larger than block end"));
2857 newobj
->start_addr
= valu
;
2859 /* Make a block for the local symbols within. */
2860 finish_block (0, &local_symbols
, newobj
->old_blocks
,
2861 newobj
->start_addr
, valu
);
2866 /* This is the outermost LBRAC...RBRAC pair. There is no
2867 need to do anything; leave the symbols that preceded it
2868 to be attached to the function's own block. We need to
2869 indicate that we just moved outside of the function. */
2870 within_function
= 0;
2877 /* This kind of symbol indicates the start of an object file.
2878 Relocate for dynamic loading. */
2879 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2883 /* This type of symbol indicates the start of data for one
2884 source file. Finish the symbol table of the previous source
2885 file (if any) and start accumulating a new symbol table.
2886 Relocate for dynamic loading. */
2887 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2891 if (get_last_source_file ())
2893 /* Check if previous symbol was also an N_SO (with some
2894 sanity checks). If so, that one was actually the
2895 directory name, and the current one is the real file
2896 name. Patch things up. */
2897 if (previous_stab_code
== (unsigned char) N_SO
)
2899 patch_subfile_names (current_subfile
, name
);
2900 break; /* Ignore repeated SOs. */
2902 end_symtab (valu
, SECT_OFF_TEXT (objfile
));
2906 /* Null name means this just marks the end of text for this .o
2907 file. Don't start a new symtab in this case. */
2908 if (*name
== '\000')
2911 if (block_address_function_relative
)
2912 function_start_offset
= 0;
2915 start_symtab (objfile
, name
, NULL
, valu
);
2916 record_debugformat ("stabs");
2920 /* This type of symbol indicates the start of data for a
2921 sub-source-file, one whose contents were copied or included
2922 in the compilation of the main source file (whose name was
2923 given in the N_SO symbol). Relocate for dynamic loading. */
2924 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2925 start_subfile (name
);
2930 add_new_header_file (name
, valu
);
2931 start_subfile (name
);
2935 start_subfile (pop_subfile ());
2939 add_old_header_file (name
, valu
);
2943 /* This type of "symbol" really just records one line-number --
2944 core-address correspondence. Enter it in the line list for
2945 this symbol table. */
2947 /* Relocate for dynamic loading and for ELF acc
2948 function-relative symbols. */
2949 valu
+= function_start_offset
;
2951 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
2952 middle of the prologue instead of right at the start of the
2953 function. To deal with this we record the address for the
2954 first N_SLINE stab to be the start of the function instead of
2955 the listed location. We really shouldn't to this. When
2956 compiling with optimization, this first N_SLINE stab might be
2957 optimized away. Other (non-GCC) compilers don't emit this
2958 stab at all. There is no real harm in having an extra
2959 numbered line, although it can be a bit annoying for the
2960 user. However, it totally screws up our testsuite.
2962 So for now, keep adjusting the address of the first N_SLINE
2963 stab, but only for code compiled with GCC. */
2965 if (within_function
&& sline_found_in_function
== 0)
2967 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
2968 last_function_start
: valu
;
2970 record_line (current_subfile
, desc
,
2971 gdbarch_addr_bits_remove (gdbarch
, addr
));
2972 sline_found_in_function
= 1;
2975 record_line (current_subfile
, desc
,
2976 gdbarch_addr_bits_remove (gdbarch
, valu
));
2980 common_block_start (name
, objfile
);
2984 common_block_end (objfile
);
2987 /* The following symbol types need to have the appropriate
2988 offset added to their value; then we process symbol
2989 definitions in the name. */
2991 case N_STSYM
: /* Static symbol in data segment. */
2992 case N_LCSYM
: /* Static symbol in BSS segment. */
2993 case N_ROSYM
: /* Static symbol in read-only data segment. */
2994 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2995 Solaris 2's stabs-in-elf makes *most* symbols relative but
2996 leaves a few absolute (at least for Solaris 2.1 and version
2997 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
2998 the fence. .stab "foo:S...",N_STSYM is absolute (ld
2999 relocates it) .stab "foo:V...",N_STSYM is relative (section
3000 base subtracted). This leaves us no choice but to search for
3001 the 'S' or 'V'... (or pass the whole section_offsets stuff
3002 down ONE MORE function call level, which we really don't want
3007 /* Normal object file and NLMs have non-zero text seg offsets,
3008 but don't need their static syms offset in this fashion.
3009 XXX - This is really a crock that should be fixed in the
3010 solib handling code so that I don't have to work around it
3013 if (!symfile_relocatable
)
3015 p
= strchr (name
, ':');
3016 if (p
!= 0 && p
[1] == 'S')
3018 /* The linker relocated it. We don't want to add a
3019 Sun-stabs Tfoo.foo-like offset, but we *do*
3020 want to add whatever solib.c passed to
3021 symbol_file_add as addr (this is known to affect
3022 SunOS 4, and I suspect ELF too). Since there is no
3023 Ttext.text symbol, we can get addr from the text offset. */
3024 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3025 goto define_a_symbol
;
3028 /* Since it's not the kludge case, re-dispatch to the right
3039 internal_error (__FILE__
, __LINE__
,
3040 _("failed internal consistency check"));
3044 case_N_STSYM
: /* Static symbol in data segment. */
3045 case N_DSLINE
: /* Source line number, data segment. */
3046 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3047 goto define_a_symbol
;
3049 case_N_LCSYM
: /* Static symbol in BSS segment. */
3050 case N_BSLINE
: /* Source line number, BSS segment. */
3051 /* N_BROWS: overlaps with N_BSLINE. */
3052 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3053 goto define_a_symbol
;
3055 case_N_ROSYM
: /* Static symbol in read-only data segment. */
3056 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3057 goto define_a_symbol
;
3059 case N_ENTRY
: /* Alternate entry point. */
3060 /* Relocate for dynamic loading. */
3061 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3062 goto define_a_symbol
;
3064 /* The following symbol types we don't know how to process.
3065 Handle them in a "default" way, but complain to people who
3068 case N_CATCH
: /* Exception handler catcher. */
3069 case N_EHDECL
: /* Exception handler name. */
3070 case N_PC
: /* Global symbol in Pascal. */
3071 case N_M2C
: /* Modula-2 compilation unit. */
3072 /* N_MOD2: overlaps with N_EHDECL. */
3073 case N_SCOPE
: /* Modula-2 scope information. */
3074 case N_ECOML
: /* End common (local name). */
3075 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3080 unknown_symtype_complaint (hex_string (type
));
3083 /* The following symbol types don't need the address field
3084 relocated, since it is either unused, or is absolute. */
3086 case N_GSYM
: /* Global variable. */
3087 case N_NSYMS
: /* Number of symbols (Ultrix). */
3088 case N_NOMAP
: /* No map? (Ultrix). */
3089 case N_RSYM
: /* Register variable. */
3090 case N_DEFD
: /* Modula-2 GNU module dependency. */
3091 case N_SSYM
: /* Struct or union element. */
3092 case N_LSYM
: /* Local symbol in stack. */
3093 case N_PSYM
: /* Parameter variable. */
3094 case N_LENG
: /* Length of preceding symbol type. */
3098 char *colon_pos
= strchr (name
, ':');
3100 if (colon_pos
== NULL
)
3103 deftype
= colon_pos
[1];
3109 function_stab_type
= type
;
3111 /* Deal with the SunPRO 3.0 compiler which omits the
3112 address from N_FUN symbols. */
3114 && valu
== ANOFFSET (section_offsets
,
3115 SECT_OFF_TEXT (objfile
))
3116 && gdbarch_sofun_address_maybe_missing (gdbarch
))
3118 CORE_ADDR minsym_valu
=
3119 find_stab_function_addr (name
, get_last_source_file (),
3122 /* The function find_stab_function_addr will return
3123 0 if the minimal symbol wasn't found.
3124 (Unfortunately, this might also be a valid
3125 address.) Anyway, if it *does* return 0, it is
3126 likely that the value was set correctly to begin
3128 if (minsym_valu
!= 0)
3132 if (block_address_function_relative
)
3133 /* For Solaris 2 compilers, the block addresses and
3134 N_SLINE's are relative to the start of the
3135 function. On normal systems, and when using GCC on
3136 Solaris 2, these addresses are just absolute, or
3137 relative to the N_SO, depending on
3138 BLOCK_ADDRESS_ABSOLUTE. */
3139 function_start_offset
= valu
;
3141 within_function
= 1;
3143 if (context_stack_depth
> 1)
3145 complaint (&symfile_complaints
,
3146 _("unmatched N_LBRAC before symtab pos %d"),
3151 if (context_stack_depth
> 0)
3153 struct block
*block
;
3155 newobj
= pop_context ();
3156 /* Make a block for the local symbols within. */
3157 block
= finish_block (newobj
->name
, &local_symbols
,
3158 newobj
->old_blocks
, newobj
->start_addr
,
3161 /* For C++, set the block's scope. */
3162 if (SYMBOL_LANGUAGE (newobj
->name
) == language_cplus
)
3163 cp_set_block_scope (newobj
->name
, block
,
3164 &objfile
->objfile_obstack
);
3167 newobj
= push_context (0, valu
);
3168 newobj
->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3172 define_symbol (valu
, name
, desc
, type
, objfile
);
3178 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3179 for a bunch of other flags, too. Someday we may parse their
3180 flags; for now we ignore theirs and hope they'll ignore ours. */
3181 case N_OPT
: /* Solaris 2: Compiler options. */
3184 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3186 processing_gcc_compilation
= 2;
3193 case N_MAIN
: /* Name of main routine. */
3194 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3195 it with a symbol file with "main" and without N_MAIN. I'm
3196 not sure exactly what rule to follow but probably something
3197 like: N_MAIN takes precedence over "main" no matter what
3198 objfile it is in; If there is more than one N_MAIN, choose
3199 the one in the symfile_objfile; If there is more than one
3200 N_MAIN within a given objfile, complain() and choose
3201 arbitrarily. (kingdon) */
3203 set_objfile_main_name (objfile
, name
, language_unknown
);
3206 /* The following symbol types can be ignored. */
3207 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3208 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3209 /* N_UNDF: Solaris 2: File separator mark. */
3210 /* N_UNDF: -- we will never encounter it, since we only process
3211 one file's symbols at once. */
3212 case N_ENDM
: /* Solaris 2: End of module. */
3213 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3217 /* '#' is a GNU C extension to allow one symbol to refer to another
3220 Generally this is used so that an alias can refer to its main
3225 /* Initialize symbol reference names and determine if this is a
3226 definition. If a symbol reference is being defined, go ahead
3227 and add it. Otherwise, just return. */
3232 /* If this stab defines a new reference ID that is not on the
3233 reference list, then put it on the reference list.
3235 We go ahead and advance NAME past the reference, even though
3236 it is not strictly necessary at this time. */
3237 refnum
= symbol_reference_defined (&s
);
3239 if (!ref_search (refnum
))
3240 ref_add (refnum
, 0, name
, valu
);
3244 previous_stab_code
= type
;
3247 /* FIXME: The only difference between this and elfstab_build_psymtabs
3248 is the call to install_minimal_symbols for elf, and the support for
3249 split sections. If the differences are really that small, the code
3250 should be shared. */
3252 /* Scan and build partial symbols for an coff symbol file.
3253 The coff file has already been processed to get its minimal symbols.
3255 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3258 OBJFILE is the object file we are reading symbols from.
3259 ADDR is the address relative to which the symbols are (e.g.
3260 the base address of the text segment).
3261 TEXTADDR is the address of the text section.
3262 TEXTSIZE is the size of the text section.
3263 STABSECTS is the list of .stab sections in OBJFILE.
3264 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3265 .stabstr section exists.
3267 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3268 adjusted for coff details. */
3271 coffstab_build_psymtabs (struct objfile
*objfile
,
3272 CORE_ADDR textaddr
, unsigned int textsize
,
3273 struct stab_section_list
*stabsects
,
3274 file_ptr stabstroffset
, unsigned int stabstrsize
)
3277 bfd
*sym_bfd
= objfile
->obfd
;
3278 char *name
= bfd_get_filename (sym_bfd
);
3279 struct dbx_symfile_info
*info
;
3280 unsigned int stabsize
;
3282 /* There is already a dbx_symfile_info allocated by our caller.
3283 It might even contain some info from the coff symtab to help us. */
3284 info
= DBX_SYMFILE_INFO (objfile
);
3286 DBX_TEXT_ADDR (objfile
) = textaddr
;
3287 DBX_TEXT_SIZE (objfile
) = textsize
;
3289 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3290 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3291 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3293 if (stabstrsize
> bfd_get_size (sym_bfd
))
3294 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3295 DBX_STRINGTAB (objfile
) = (char *)
3296 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3297 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3299 /* Now read in the string table in one big gulp. */
3301 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3303 perror_with_name (name
);
3304 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3305 if (val
!= stabstrsize
)
3306 perror_with_name (name
);
3308 stabsread_new_init ();
3309 buildsym_new_init ();
3310 free_header_files ();
3311 init_header_files ();
3313 processing_acc_compilation
= 1;
3315 /* In a coff file, we've already installed the minimal symbols that came
3316 from the coff (non-stab) symbol table, so always act like an
3317 incremental load here. */
3318 if (stabsects
->next
== NULL
)
3320 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3321 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3322 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3326 struct stab_section_list
*stabsect
;
3328 DBX_SYMCOUNT (objfile
) = 0;
3329 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3331 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3332 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3335 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3337 symbuf_sections
= stabsects
->next
;
3338 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3342 dbx_symfile_read (objfile
, 0);
3345 /* Scan and build partial symbols for an ELF symbol file.
3346 This ELF file has already been processed to get its minimal symbols.
3348 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3351 OBJFILE is the object file we are reading symbols from.
3352 ADDR is the address relative to which the symbols are (e.g.
3353 the base address of the text segment).
3354 STABSECT is the BFD section information for the .stab section.
3355 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3356 .stabstr section exists.
3358 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3359 adjusted for elf details. */
3362 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
3363 file_ptr stabstroffset
, unsigned int stabstrsize
)
3366 bfd
*sym_bfd
= objfile
->obfd
;
3367 char *name
= bfd_get_filename (sym_bfd
);
3368 struct dbx_symfile_info
*info
;
3369 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
3371 /* There is already a dbx_symfile_info allocated by our caller.
3372 It might even contain some info from the ELF symtab to help us. */
3373 info
= DBX_SYMFILE_INFO (objfile
);
3375 /* Find the first and last text address. dbx_symfile_read seems to
3377 find_text_range (sym_bfd
, objfile
);
3379 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3380 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3381 DBX_SYMCOUNT (objfile
)
3382 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3383 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3384 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3385 DBX_STAB_SECTION (objfile
) = stabsect
;
3387 if (stabstrsize
> bfd_get_size (sym_bfd
))
3388 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3389 DBX_STRINGTAB (objfile
) = (char *)
3390 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3391 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3393 /* Now read in the string table in one big gulp. */
3395 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3397 perror_with_name (name
);
3398 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3399 if (val
!= stabstrsize
)
3400 perror_with_name (name
);
3402 stabsread_new_init ();
3403 buildsym_new_init ();
3404 free_header_files ();
3405 init_header_files ();
3407 processing_acc_compilation
= 1;
3410 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3411 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3413 make_cleanup (free_current_contents
, (void *) &stabs_data
);
3415 /* In an elf file, we've already installed the minimal symbols that came
3416 from the elf (non-stab) symbol table, so always act like an
3417 incremental load here. dbx_symfile_read should not generate any new
3418 minimal symbols, since we will have already read the ELF dynamic symbol
3419 table and normal symbol entries won't be in the ".stab" section; but in
3420 case it does, it will install them itself. */
3421 dbx_symfile_read (objfile
, 0);
3423 do_cleanups (back_to
);
3426 /* Scan and build partial symbols for a file with special sections for stabs
3427 and stabstrings. The file has already been processed to get its minimal
3428 symbols, and any other symbols that might be necessary to resolve GSYMs.
3430 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3433 OBJFILE is the object file we are reading symbols from.
3434 ADDR is the address relative to which the symbols are (e.g. the base address
3435 of the text segment).
3436 STAB_NAME is the name of the section that contains the stabs.
3437 STABSTR_NAME is the name of the section that contains the stab strings.
3439 This routine is mostly copied from dbx_symfile_init and
3440 dbx_symfile_read. */
3443 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3444 char *stabstr_name
, char *text_name
)
3447 bfd
*sym_bfd
= objfile
->obfd
;
3448 char *name
= bfd_get_filename (sym_bfd
);
3450 asection
*stabstrsect
;
3451 asection
*text_sect
;
3452 struct dbx_symfile_info
*dbx
;
3454 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3455 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3461 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3462 "but not string section (%s)"),
3463 stab_name
, stabstr_name
);
3465 dbx
= XCNEW (struct dbx_symfile_info
);
3466 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
3468 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3470 error (_("Can't find %s section in symbol file"), text_name
);
3471 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3472 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3474 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3475 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3476 / DBX_SYMBOL_SIZE (objfile
);
3477 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3478 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING
3482 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3483 error (_("ridiculous string table size: %d bytes"),
3484 DBX_STRINGTAB_SIZE (objfile
));
3485 DBX_STRINGTAB (objfile
) = (char *)
3486 obstack_alloc (&objfile
->objfile_obstack
,
3487 DBX_STRINGTAB_SIZE (objfile
) + 1);
3488 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3490 /* Now read in the string table in one big gulp. */
3492 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3493 stabstrsect
, /* bfd section */
3494 DBX_STRINGTAB (objfile
), /* input buffer */
3495 0, /* offset into section */
3496 DBX_STRINGTAB_SIZE (objfile
)); /* amount to
3500 perror_with_name (name
);
3502 stabsread_new_init ();
3503 buildsym_new_init ();
3504 free_header_files ();
3505 init_header_files ();
3507 /* Now, do an incremental load. */
3509 processing_acc_compilation
= 1;
3510 dbx_symfile_read (objfile
, 0);
3513 static const struct sym_fns aout_sym_fns
=
3515 dbx_new_init
, /* init anything gbl to entire symtab */
3516 dbx_symfile_init
, /* read initial info, setup for sym_read() */
3517 dbx_symfile_read
, /* read a symbol file into symtab */
3518 NULL
, /* sym_read_psymbols */
3519 dbx_symfile_finish
, /* finished with file, cleanup */
3520 default_symfile_offsets
, /* parse user's offsets to internal form */
3521 default_symfile_segments
, /* Get segment information from a file. */
3523 default_symfile_relocate
, /* Relocate a debug section. */
3524 NULL
, /* sym_probe_fns */
3529 _initialize_dbxread (void)
3531 add_symtab_fns (bfd_target_aout_flavour
, &aout_sym_fns
);
3533 dbx_objfile_data_key
3534 = register_objfile_data_with_cleanup (NULL
, dbx_free_symfile_info
);