1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2017 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* This module provides three functions: dbx_symfile_init,
20 which initializes to read a symbol file; dbx_new_init, which
21 discards existing cached information when all symbols are being
22 discarded; and dbx_symfile_read, which reads a symbol table
25 dbx_symfile_read only does the minimum work necessary for letting the
26 user "name" things symbolically; it does not read the entire symtab.
27 Instead, it reads the external and static symbols and puts them in partial
28 symbol tables. When more extensive information is requested of a
29 file, the corresponding partial symbol table is mutated into a full
30 fledged symbol table by going back and reading the symbols
31 for real. dbx_psymtab_to_symtab() is the function that does this */
34 #if defined(__CYGNUSCLIB__)
35 #include <sys/types.h>
39 #include "gdb_obstack.h"
42 #include "breakpoint.h"
44 #include "gdbcore.h" /* for bfd stuff */
45 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
46 #include "filenames.h"
49 #include "stabsread.h"
50 #include "gdb-stabs.h"
52 #include "complaints.h"
54 #include "cp-support.h"
58 #include "aout/aout64.h"
59 #include "aout/stab_gnu.h" /* We always use GNU stabs, not
63 /* Key for dbx-associated data. */
65 const struct objfile_data
*dbx_objfile_data_key
;
67 /* We put a pointer to this structure in the read_symtab_private field
72 /* Offset within the file symbol table of first local symbol for this
77 /* Length (in bytes) of the section of the symbol table devoted to
78 this file's symbols (actually, the section bracketed may contain
79 more than just this file's symbols). If ldsymlen is 0, the only
80 reason for this thing's existence is the dependency list. Nothing
81 else will happen when it is read in. */
85 /* The size of each symbol in the symbol file (in external form). */
89 /* Further information needed to locate the symbols if they are in
94 int file_string_offset
;
97 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
98 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
99 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
100 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
101 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
102 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
103 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
106 /* The objfile we are currently reading. */
108 static struct objfile
*dbxread_objfile
;
110 /* Remember what we deduced to be the source language of this psymtab. */
112 static enum language psymtab_language
= language_unknown
;
114 /* The BFD for this file -- implicit parameter to next_symbol_text. */
116 static bfd
*symfile_bfd
;
118 /* The size of each symbol in the symbol file (in external form).
119 This is set by dbx_symfile_read when building psymtabs, and by
120 dbx_psymtab_to_symtab when building symtabs. */
122 static unsigned symbol_size
;
124 /* This is the offset of the symbol table in the executable file. */
126 static unsigned symbol_table_offset
;
128 /* This is the offset of the string table in the executable file. */
130 static unsigned string_table_offset
;
132 /* For elf+stab executables, the n_strx field is not a simple index
133 into the string table. Instead, each .o file has a base offset in
134 the string table, and the associated symbols contain offsets from
135 this base. The following two variables contain the base offset for
136 the current and next .o files. */
138 static unsigned int file_string_table_offset
;
139 static unsigned int next_file_string_table_offset
;
141 /* .o and NLM files contain unrelocated addresses which are based at
142 0. When non-zero, this flag disables some of the special cases for
143 Solaris elf+stab text addresses at location 0. */
145 static int symfile_relocatable
= 0;
148 /* The lowest text address we have yet encountered. This is needed
149 because in an a.out file, there is no header field which tells us
150 what address the program is actually going to be loaded at, so we
151 need to make guesses based on the symbols (which *are* relocated to
152 reflect the address it will be loaded at). */
154 static CORE_ADDR lowest_text_address
;
156 /* Non-zero if there is any line number info in the objfile. Prevents
157 dbx_end_psymtab from discarding an otherwise empty psymtab. */
159 static int has_line_numbers
;
161 /* Complaints about the symbols we have encountered. */
164 unknown_symtype_complaint (const char *arg1
)
166 complaint (&symfile_complaints
, _("unknown symbol type %s"), arg1
);
170 lbrac_mismatch_complaint (int arg1
)
172 complaint (&symfile_complaints
,
173 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1
);
177 repeated_header_complaint (const char *arg1
, int arg2
)
179 complaint (&symfile_complaints
,
180 _("\"repeated\" header file %s not "
181 "previously seen, at symtab pos %d"),
185 /* find_text_range --- find start and end of loadable code sections
187 The find_text_range function finds the shortest address range that
188 encloses all sections containing executable code, and stores it in
189 objfile's text_addr and text_size members.
191 dbx_symfile_read will use this to finish off the partial symbol
192 table, in some cases. */
195 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
202 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
203 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
205 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
206 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
210 if (sec_start
< start
)
225 error (_("Can't find any code sections in symbol file"));
227 DBX_TEXT_ADDR (objfile
) = start
;
228 DBX_TEXT_SIZE (objfile
) = end
- start
;
233 /* During initial symbol readin, we need to have a structure to keep
234 track of which psymtabs have which bincls in them. This structure
235 is used during readin to setup the list of dependencies within each
236 partial symbol table. */
238 struct header_file_location
240 const char *name
; /* Name of header file */
241 int instance
; /* See above */
242 struct partial_symtab
*pst
; /* Partial symtab that has the
243 BINCL/EINCL defs for this file. */
246 /* The actual list and controling variables. */
247 static struct header_file_location
*bincl_list
, *next_bincl
;
248 static int bincls_allocated
;
250 /* Local function prototypes. */
252 static void read_ofile_symtab (struct objfile
*, struct partial_symtab
*);
254 static void dbx_read_symtab (struct partial_symtab
*self
,
255 struct objfile
*objfile
);
257 static void dbx_psymtab_to_symtab_1 (struct objfile
*, struct partial_symtab
*);
259 static void read_dbx_symtab (minimal_symbol_reader
&, struct objfile
*);
261 static void free_bincl_list (struct objfile
*);
263 static struct partial_symtab
*find_corresponding_bincl_psymtab (const char *,
266 static void add_bincl_to_list (struct partial_symtab
*, const char *, int);
268 static void init_bincl_list (int, struct objfile
*);
270 static const char *dbx_next_symbol_text (struct objfile
*);
272 static void fill_symbuf (bfd
*);
274 static void dbx_symfile_init (struct objfile
*);
276 static void dbx_new_init (struct objfile
*);
278 static void dbx_symfile_read (struct objfile
*, symfile_add_flags
);
280 static void dbx_symfile_finish (struct objfile
*);
282 static void record_minimal_symbol (minimal_symbol_reader
&,
283 const char *, CORE_ADDR
, int,
286 static void add_new_header_file (const char *, int);
288 static void add_old_header_file (const char *, int);
290 static void add_this_object_header_file (int);
292 static struct partial_symtab
*start_psymtab (struct objfile
*, const char *,
294 std::vector
<partial_symbol
*> &,
295 std::vector
<partial_symbol
*> &);
297 /* Free up old header file tables. */
300 free_header_files (void)
302 if (this_object_header_files
)
304 xfree (this_object_header_files
);
305 this_object_header_files
= NULL
;
307 n_allocated_this_object_header_files
= 0;
310 /* Allocate new header file tables. */
313 init_header_files (void)
315 n_allocated_this_object_header_files
= 10;
316 this_object_header_files
= XNEWVEC (int, 10);
319 /* Add header file number I for this object file
320 at the next successive FILENUM. */
323 add_this_object_header_file (int i
)
325 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
327 n_allocated_this_object_header_files
*= 2;
328 this_object_header_files
329 = (int *) xrealloc ((char *) this_object_header_files
,
330 n_allocated_this_object_header_files
* sizeof (int));
333 this_object_header_files
[n_this_object_header_files
++] = i
;
336 /* Add to this file an "old" header file, one already seen in
337 a previous object file. NAME is the header file's name.
338 INSTANCE is its instance code, to select among multiple
339 symbol tables for the same header file. */
342 add_old_header_file (const char *name
, int instance
)
344 struct header_file
*p
= HEADER_FILES (dbxread_objfile
);
347 for (i
= 0; i
< N_HEADER_FILES (dbxread_objfile
); i
++)
348 if (filename_cmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
350 add_this_object_header_file (i
);
353 repeated_header_complaint (name
, symnum
);
356 /* Add to this file a "new" header file: definitions for its types follow.
357 NAME is the header file's name.
358 Most often this happens only once for each distinct header file,
359 but not necessarily. If it happens more than once, INSTANCE has
360 a different value each time, and references to the header file
361 use INSTANCE values to select among them.
363 dbx output contains "begin" and "end" markers for each new header file,
364 but at this level we just need to know which files there have been;
365 so we record the file when its "begin" is seen and ignore the "end". */
368 add_new_header_file (const char *name
, int instance
)
371 struct header_file
*hfile
;
373 /* Make sure there is room for one more header file. */
375 i
= N_ALLOCATED_HEADER_FILES (dbxread_objfile
);
377 if (N_HEADER_FILES (dbxread_objfile
) == i
)
381 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = 10;
382 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
383 xmalloc (10 * sizeof (struct header_file
));
388 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = i
;
389 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
390 xrealloc ((char *) HEADER_FILES (dbxread_objfile
),
391 (i
* sizeof (struct header_file
)));
395 /* Create an entry for this header file. */
397 i
= N_HEADER_FILES (dbxread_objfile
)++;
398 hfile
= HEADER_FILES (dbxread_objfile
) + i
;
399 hfile
->name
= xstrdup (name
);
400 hfile
->instance
= instance
;
402 hfile
->vector
= XCNEWVEC (struct type
*, 10);
404 add_this_object_header_file (i
);
408 static struct type
**
409 explicit_lookup_type (int real_filenum
, int index
)
411 struct header_file
*f
= &HEADER_FILES (dbxread_objfile
)[real_filenum
];
413 if (index
>= f
->length
)
416 f
->vector
= (struct type
**)
417 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
418 memset (&f
->vector
[f
->length
/ 2],
419 '\0', f
->length
* sizeof (struct type
*) / 2);
421 return &f
->vector
[index
];
426 record_minimal_symbol (minimal_symbol_reader
&reader
,
427 const char *name
, CORE_ADDR address
, int type
,
428 struct objfile
*objfile
)
430 enum minimal_symbol_type ms_type
;
437 section
= SECT_OFF_TEXT (objfile
);
441 section
= SECT_OFF_DATA (objfile
);
445 section
= SECT_OFF_BSS (objfile
);
454 section
= SECT_OFF_DATA (objfile
);
457 /* I don't think this type actually exists; since a N_SETV is the result
458 of going over many .o files, it doesn't make sense to have one
460 ms_type
= mst_file_data
;
461 section
= SECT_OFF_DATA (objfile
);
468 ms_type
= mst_file_text
;
469 section
= SECT_OFF_TEXT (objfile
);
472 ms_type
= mst_file_data
;
474 /* Check for __DYNAMIC, which is used by Sun shared libraries.
475 Record it as global even if it's local, not global, so
476 lookup_minimal_symbol can find it. We don't check symbol_leading_char
477 because for SunOS4 it always is '_'. */
478 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
481 /* Same with virtual function tables, both global and static. */
483 const char *tempstring
= name
;
485 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
487 if (is_vtable_name (tempstring
))
490 section
= SECT_OFF_DATA (objfile
);
493 ms_type
= mst_file_bss
;
494 section
= SECT_OFF_BSS (objfile
);
497 ms_type
= mst_unknown
;
502 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
503 && address
< lowest_text_address
)
504 lowest_text_address
= address
;
506 reader
.record_with_info (name
, address
, ms_type
, section
);
509 /* Scan and build partial symbols for a symbol file.
510 We have been initialized by a call to dbx_symfile_init, which
511 put all the relevant info into a "struct dbx_symfile_info",
512 hung off the objfile structure. */
515 dbx_symfile_read (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
519 struct cleanup
*back_to
;
521 sym_bfd
= objfile
->obfd
;
523 /* .o and .nlm files are relocatables with text, data and bss segs based at
524 0. This flag disables special (Solaris stabs-in-elf only) fixups for
525 symbols with a value of 0. */
527 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
529 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
531 perror_with_name (objfile_name (objfile
));
533 /* Size the symbol table. */
534 if (objfile
->global_psymbols
.capacity () == 0
535 && objfile
->static_psymbols
.capacity () == 0)
536 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
538 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
539 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
541 free_pending_blocks ();
542 back_to
= make_cleanup (really_free_pendings
, 0);
544 minimal_symbol_reader
reader (objfile
);
546 /* Read stabs data from executable file and define symbols. */
548 read_dbx_symtab (reader
, objfile
);
550 /* Install any minimal symbols that have been collected as the current
551 minimal symbols for this objfile. */
555 do_cleanups (back_to
);
558 /* Initialize anything that needs initializing when a completely new
559 symbol file is specified (not just adding some symbols from another
560 file, e.g. a shared library). */
563 dbx_new_init (struct objfile
*ignore
)
565 stabsread_new_init ();
566 buildsym_new_init ();
567 init_header_files ();
571 /* dbx_symfile_init ()
572 is the dbx-specific initialization routine for reading symbols.
573 It is passed a struct objfile which contains, among other things,
574 the BFD for the file whose symbols are being read, and a slot for a pointer
575 to "private data" which we fill with goodies.
577 We read the string table into malloc'd space and stash a pointer to it.
579 Since BFD doesn't know how to read debug symbols in a format-independent
580 way (and may never do so...), we have to do it ourselves. We will never
581 be called unless this is an a.out (or very similar) file.
582 FIXME, there should be a cleaner peephole into the BFD environment here. */
584 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
587 dbx_symfile_init (struct objfile
*objfile
)
590 bfd
*sym_bfd
= objfile
->obfd
;
591 char *name
= bfd_get_filename (sym_bfd
);
593 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
594 struct dbx_symfile_info
*dbx
;
596 /* Allocate struct to keep track of the symfile. */
597 dbx
= XCNEW (struct dbx_symfile_info
);
598 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
600 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
601 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
602 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
604 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
605 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
606 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
608 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
610 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
612 error (_("Can't find .text section in symbol file"));
613 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
614 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
616 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
617 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
618 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
620 /* Read the string table and stash it away in the objfile_obstack.
621 When we blow away the objfile the string table goes away as well.
622 Note that gdb used to use the results of attempting to malloc the
623 string table, based on the size it read, as a form of sanity check
624 for botched byte swapping, on the theory that a byte swapped string
625 table size would be so totally bogus that the malloc would fail. Now
626 that we put in on the objfile_obstack, we can't do this since gdb gets
627 a fatal error (out of virtual memory) if the size is bogus. We can
628 however at least check to see if the size is less than the size of
629 the size field itself, or larger than the size of the entire file.
630 Note that all valid string tables have a size greater than zero, since
631 the bytes used to hold the size are included in the count. */
633 if (STRING_TABLE_OFFSET
== 0)
635 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
636 will never be zero, even when there is no string table. This
637 would appear to be a bug in bfd. */
638 DBX_STRINGTAB_SIZE (objfile
) = 0;
639 DBX_STRINGTAB (objfile
) = NULL
;
643 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
645 perror_with_name (name
);
647 memset (size_temp
, 0, sizeof (size_temp
));
648 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
651 perror_with_name (name
);
655 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
656 EOF if there is no string table, and attempting to read the size
657 from EOF will read zero bytes. */
658 DBX_STRINGTAB_SIZE (objfile
) = 0;
659 DBX_STRINGTAB (objfile
) = NULL
;
663 /* Read some data that would appear to be the string table size.
664 If there really is a string table, then it is probably the right
665 size. Byteswap if necessary and validate the size. Note that
666 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
667 random data that happened to be at STRING_TABLE_OFFSET, because
668 bfd can't tell us there is no string table, the sanity checks may
669 or may not catch this. */
670 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
672 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
673 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
674 error (_("ridiculous string table size (%d bytes)."),
675 DBX_STRINGTAB_SIZE (objfile
));
677 DBX_STRINGTAB (objfile
) =
678 (char *) obstack_alloc (&objfile
->objfile_obstack
,
679 DBX_STRINGTAB_SIZE (objfile
));
680 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
682 /* Now read in the string table in one big gulp. */
684 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
686 perror_with_name (name
);
687 val
= bfd_bread (DBX_STRINGTAB (objfile
),
688 DBX_STRINGTAB_SIZE (objfile
),
690 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
691 perror_with_name (name
);
696 /* Perform any local cleanups required when we are done with a particular
697 objfile. I.E, we are in the process of discarding all symbol information
698 for an objfile, freeing up all memory held for it, and unlinking the
699 objfile struct from the global list of known objfiles. */
702 dbx_symfile_finish (struct objfile
*objfile
)
704 free_header_files ();
708 dbx_free_symfile_info (struct objfile
*objfile
, void *arg
)
710 struct dbx_symfile_info
*dbx
= (struct dbx_symfile_info
*) arg
;
712 if (dbx
->header_files
!= NULL
)
714 int i
= dbx
->n_header_files
;
715 struct header_file
*hfiles
= dbx
->header_files
;
719 xfree (hfiles
[i
].name
);
720 xfree (hfiles
[i
].vector
);
730 /* Buffer for reading the symbol table entries. */
731 static struct external_nlist symbuf
[4096];
732 static int symbuf_idx
;
733 static int symbuf_end
;
735 /* Name of last function encountered. Used in Solaris to approximate
736 object file boundaries. */
737 static const char *last_function_name
;
739 /* The address in memory of the string table of the object file we are
740 reading (which might not be the "main" object file, but might be a
741 shared library or some other dynamically loaded thing). This is
742 set by read_dbx_symtab when building psymtabs, and by
743 read_ofile_symtab when building symtabs, and is used only by
744 next_symbol_text. FIXME: If that is true, we don't need it when
745 building psymtabs, right? */
746 static char *stringtab_global
;
748 /* These variables are used to control fill_symbuf when the stabs
749 symbols are not contiguous (as may be the case when a COFF file is
750 linked using --split-by-reloc). */
751 static struct stab_section_list
*symbuf_sections
;
752 static unsigned int symbuf_left
;
753 static unsigned int symbuf_read
;
755 /* This variable stores a global stabs buffer, if we read stabs into
756 memory in one chunk in order to process relocations. */
757 static bfd_byte
*stabs_data
;
759 /* Refill the symbol table input buffer
760 and set the variables that control fetching entries from it.
761 Reports an error if no data available.
762 This function can read past the end of the symbol table
763 (into the string table) but this does no harm. */
766 fill_symbuf (bfd
*sym_bfd
)
773 nbytes
= sizeof (symbuf
);
774 if (nbytes
> symbuf_left
)
775 nbytes
= symbuf_left
;
776 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
778 else if (symbuf_sections
== NULL
)
780 count
= sizeof (symbuf
);
781 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
785 if (symbuf_left
<= 0)
787 file_ptr filepos
= symbuf_sections
->section
->filepos
;
789 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
790 perror_with_name (bfd_get_filename (sym_bfd
));
791 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
792 symbol_table_offset
= filepos
- symbuf_read
;
793 symbuf_sections
= symbuf_sections
->next
;
797 if (count
> sizeof (symbuf
))
798 count
= sizeof (symbuf
);
799 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
803 perror_with_name (bfd_get_filename (sym_bfd
));
804 else if (nbytes
== 0)
805 error (_("Premature end of file reading symbol table"));
806 symbuf_end
= nbytes
/ symbol_size
;
808 symbuf_left
-= nbytes
;
809 symbuf_read
+= nbytes
;
813 stabs_seek (int sym_offset
)
817 symbuf_read
+= sym_offset
;
818 symbuf_left
-= sym_offset
;
821 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
824 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
826 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
827 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
828 (intern).n_other = 0; \
829 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
830 if (bfd_get_sign_extend_vma (abfd)) \
831 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
833 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
836 /* Invariant: The symbol pointed to by symbuf_idx is the first one
837 that hasn't been swapped. Swap the symbol at the same time
838 that symbuf_idx is incremented. */
840 /* dbx allows the text of a symbol name to be continued into the
841 next symbol name! When such a continuation is encountered
842 (a \ at the end of the text of a name)
843 call this function to get the continuation. */
846 dbx_next_symbol_text (struct objfile
*objfile
)
848 struct internal_nlist nlist
;
850 if (symbuf_idx
== symbuf_end
)
851 fill_symbuf (symfile_bfd
);
854 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
855 OBJSTAT (objfile
, n_stabs
++);
859 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
862 /* Initialize the list of bincls to contain none and have some
866 init_bincl_list (int number
, struct objfile
*objfile
)
868 bincls_allocated
= number
;
869 next_bincl
= bincl_list
= XNEWVEC (struct header_file_location
,
873 /* Add a bincl to the list. */
876 add_bincl_to_list (struct partial_symtab
*pst
, const char *name
, int instance
)
878 if (next_bincl
>= bincl_list
+ bincls_allocated
)
880 int offset
= next_bincl
- bincl_list
;
882 bincls_allocated
*= 2;
883 bincl_list
= (struct header_file_location
*)
884 xrealloc ((char *) bincl_list
,
885 bincls_allocated
* sizeof (struct header_file_location
));
886 next_bincl
= bincl_list
+ offset
;
888 next_bincl
->pst
= pst
;
889 next_bincl
->instance
= instance
;
890 next_bincl
++->name
= name
;
893 /* Given a name, value pair, find the corresponding
894 bincl in the list. Return the partial symtab associated
895 with that header_file_location. */
897 static struct partial_symtab
*
898 find_corresponding_bincl_psymtab (const char *name
, int instance
)
900 struct header_file_location
*bincl
;
902 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
903 if (bincl
->instance
== instance
904 && strcmp (name
, bincl
->name
) == 0)
907 repeated_header_complaint (name
, symnum
);
908 return (struct partial_symtab
*) 0;
911 /* Free the storage allocated for the bincl list. */
914 free_bincl_list (struct objfile
*objfile
)
917 bincls_allocated
= 0;
921 do_free_bincl_list_cleanup (void *objfile
)
923 free_bincl_list ((struct objfile
*) objfile
);
926 static struct cleanup
*
927 make_cleanup_free_bincl_list (struct objfile
*objfile
)
929 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
932 /* Set namestring based on nlist. If the string table index is invalid,
933 give a fake name, and print a single error message per symbol file read,
934 rather than abort the symbol reading or flood the user with messages. */
937 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
939 const char *namestring
;
941 if (nlist
->n_strx
+ file_string_table_offset
942 >= DBX_STRINGTAB_SIZE (objfile
)
943 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
945 complaint (&symfile_complaints
,
946 _("bad string table offset in symbol %d"),
948 namestring
= "<bad string table offset>";
951 namestring
= (nlist
->n_strx
+ file_string_table_offset
952 + DBX_STRINGTAB (objfile
));
957 find_stab_function_addr (const char *namestring
, const char *filename
,
958 struct objfile
*objfile
)
960 struct bound_minimal_symbol msym
;
963 const char *colon
= strchr (namestring
, ':');
967 n
= colon
- namestring
;
969 char *p
= (char *) alloca (n
+ 2);
970 strncpy (p
, namestring
, n
);
973 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
974 if (msym
.minsym
== NULL
)
976 /* Sun Fortran appends an underscore to the minimal symbol name,
977 try again with an appended underscore if the minimal symbol
981 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
984 if (msym
.minsym
== NULL
&& filename
!= NULL
)
986 /* Try again without the filename. */
988 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
990 if (msym
.minsym
== NULL
&& filename
!= NULL
)
992 /* And try again for Sun Fortran, but without the filename. */
995 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
998 return msym
.minsym
== NULL
? 0 : BMSYMBOL_VALUE_ADDRESS (msym
);
1002 function_outside_compilation_unit_complaint (const char *arg1
)
1004 complaint (&symfile_complaints
,
1005 _("function `%s' appears to be defined "
1006 "outside of all compilation units"),
1010 /* Setup partial_symtab's describing each source file for which
1011 debugging information is available. */
1014 read_dbx_symtab (minimal_symbol_reader
&reader
, struct objfile
*objfile
)
1016 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1017 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
1018 struct internal_nlist nlist
;
1019 CORE_ADDR text_addr
;
1021 const char *sym_name
;
1024 const char *namestring
;
1026 int past_first_source_file
= 0;
1027 CORE_ADDR last_function_start
= 0;
1028 struct cleanup
*back_to
;
1030 int textlow_not_set
;
1031 int data_sect_index
;
1033 /* Current partial symtab. */
1034 struct partial_symtab
*pst
;
1036 /* List of current psymtab's include files. */
1037 const char **psymtab_include_list
;
1038 int includes_allocated
;
1041 /* Index within current psymtab dependency list. */
1042 struct partial_symtab
**dependency_list
;
1043 int dependencies_used
, dependencies_allocated
;
1045 text_addr
= DBX_TEXT_ADDR (objfile
);
1046 text_size
= DBX_TEXT_SIZE (objfile
);
1048 /* FIXME. We probably want to change stringtab_global rather than add this
1049 while processing every symbol entry. FIXME. */
1050 file_string_table_offset
= 0;
1051 next_file_string_table_offset
= 0;
1053 stringtab_global
= DBX_STRINGTAB (objfile
);
1055 pst
= (struct partial_symtab
*) 0;
1057 includes_allocated
= 30;
1059 psymtab_include_list
= (const char **) alloca (includes_allocated
*
1060 sizeof (const char *));
1062 dependencies_allocated
= 30;
1063 dependencies_used
= 0;
1065 (struct partial_symtab
**) alloca (dependencies_allocated
*
1066 sizeof (struct partial_symtab
*));
1068 /* Init bincl list */
1069 init_bincl_list (20, objfile
);
1070 back_to
= make_cleanup_free_bincl_list (objfile
);
1072 set_last_source_file (NULL
);
1074 lowest_text_address
= (CORE_ADDR
) -1;
1076 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1077 abfd
= objfile
->obfd
;
1078 symbuf_end
= symbuf_idx
= 0;
1079 next_symbol_text_func
= dbx_next_symbol_text
;
1080 textlow_not_set
= 1;
1081 has_line_numbers
= 0;
1083 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1084 to global and static variables. The stab for a global or static
1085 variable doesn't give us any indication of which section it's in,
1086 so we can't tell immediately which offset in
1087 objfile->section_offsets we should apply to the variable's
1090 We could certainly find out which section contains the variable
1091 by looking up the variable's unrelocated address with
1092 find_pc_section, but that would be expensive; this is the
1093 function that constructs the partial symbol tables by examining
1094 every symbol in the entire executable, and it's
1095 performance-critical. So that expense would not be welcome. I'm
1096 not sure what to do about this at the moment.
1098 What we have done for years is to simply assume that the .data
1099 section's offset is appropriate for all global and static
1100 variables. Recently, this was expanded to fall back to the .bss
1101 section's offset if there is no .data section, and then to the
1102 .rodata section's offset. */
1103 data_sect_index
= objfile
->sect_index_data
;
1104 if (data_sect_index
== -1)
1105 data_sect_index
= SECT_OFF_BSS (objfile
);
1106 if (data_sect_index
== -1)
1107 data_sect_index
= SECT_OFF_RODATA (objfile
);
1109 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1110 for the file to have no .data, no .bss, and no .text at all, if
1111 it also has no global or static variables. If it does, we will
1112 get an internal error from an ANOFFSET macro below when we try to
1113 use data_sect_index. */
1115 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1117 /* Get the symbol for this run and pull out some info. */
1118 QUIT
; /* Allow this to be interruptable. */
1119 if (symbuf_idx
== symbuf_end
)
1121 bufp
= &symbuf
[symbuf_idx
++];
1124 * Special case to speed up readin.
1126 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1128 has_line_numbers
= 1;
1132 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1133 OBJSTAT (objfile
, n_stabs
++);
1135 /* Ok. There is a lot of code duplicated in the rest of this
1136 switch statement (for efficiency reasons). Since I don't
1137 like duplicating code, I will do my penance here, and
1138 describe the code which is duplicated:
1140 *) The assignment to namestring.
1141 *) The call to strchr.
1142 *) The addition of a partial symbol the two partial
1143 symbol lists. This last is a large section of code, so
1144 I've imbedded it in the following macro. */
1146 switch (nlist
.n_type
)
1149 * Standard, external, non-debugger, symbols
1152 case N_TEXT
| N_EXT
:
1153 case N_NBTEXT
| N_EXT
:
1156 case N_DATA
| N_EXT
:
1157 case N_NBDATA
| N_EXT
:
1162 case N_NBBSS
| N_EXT
:
1163 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1168 namestring
= set_namestring (objfile
, &nlist
);
1170 record_minimal_symbol (reader
, namestring
, nlist
.n_value
,
1171 nlist
.n_type
, objfile
); /* Always */
1174 /* Standard, local, non-debugger, symbols. */
1178 /* We need to be able to deal with both N_FN or N_TEXT,
1179 because we have no way of knowing whether the sys-supplied ld
1180 or GNU ld was used to make the executable. Sequents throw
1181 in another wrinkle -- they renumbered N_FN. */
1186 namestring
= set_namestring (objfile
, &nlist
);
1188 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1189 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1190 && namestring
[nsl
- 2] == '.'))
1192 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1193 SECT_OFF_TEXT (objfile
));
1195 if (past_first_source_file
&& pst
1196 /* The gould NP1 uses low values for .o and -l symbols
1197 which are not the address. */
1198 && nlist
.n_value
>= pst
->textlow
)
1200 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
,
1201 includes_used
, symnum
* symbol_size
,
1202 nlist
.n_value
> pst
->texthigh
1203 ? nlist
.n_value
: pst
->texthigh
,
1204 dependency_list
, dependencies_used
,
1206 pst
= (struct partial_symtab
*) 0;
1208 dependencies_used
= 0;
1209 has_line_numbers
= 0;
1212 past_first_source_file
= 1;
1221 case N_UNDF
| N_EXT
:
1222 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1223 We used to rely on the target to tell us whether it knows
1224 where the symbol has been relocated to, but none of the
1225 target implementations actually provided that operation.
1226 So we just ignore the symbol, the same way we would do if
1227 we had a target-side symbol lookup which returned no match.
1229 All other symbols (with nlist.n_value == 0), are really
1230 undefined, and so we ignore them too. */
1234 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1236 /* Deal with relative offsets in the string table
1237 used in ELF+STAB under Solaris. If we want to use the
1238 n_strx field, which contains the name of the file,
1239 we must adjust file_string_table_offset *before* calling
1240 set_namestring(). */
1241 past_first_source_file
= 1;
1242 file_string_table_offset
= next_file_string_table_offset
;
1243 next_file_string_table_offset
=
1244 file_string_table_offset
+ nlist
.n_value
;
1245 if (next_file_string_table_offset
< file_string_table_offset
)
1246 error (_("string table offset backs up at %d"), symnum
);
1247 /* FIXME -- replace error() with complaint. */
1252 /* Lots of symbol types we can just ignore. */
1259 /* Keep going . . . */
1262 * Special symbol types for GNU
1265 case N_INDR
| N_EXT
:
1267 case N_SETA
| N_EXT
:
1269 case N_SETT
| N_EXT
:
1271 case N_SETD
| N_EXT
:
1273 case N_SETB
| N_EXT
:
1284 static int prev_so_symnum
= -10;
1285 static int first_so_symnum
;
1287 static const char *dirname_nso
;
1288 int prev_textlow_not_set
;
1290 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1291 SECT_OFF_TEXT (objfile
));
1293 prev_textlow_not_set
= textlow_not_set
;
1295 /* A zero value is probably an indication for the SunPRO 3.0
1296 compiler. dbx_end_psymtab explicitly tests for zero, so
1297 don't relocate it. */
1299 if (nlist
.n_value
== 0
1300 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1302 textlow_not_set
= 1;
1306 textlow_not_set
= 0;
1308 past_first_source_file
= 1;
1310 if (prev_so_symnum
!= symnum
- 1)
1311 { /* Here if prev stab wasn't N_SO. */
1312 first_so_symnum
= symnum
;
1316 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
,
1317 includes_used
, symnum
* symbol_size
,
1318 valu
> pst
->texthigh
1319 ? valu
: pst
->texthigh
,
1320 dependency_list
, dependencies_used
,
1321 prev_textlow_not_set
);
1322 pst
= (struct partial_symtab
*) 0;
1324 dependencies_used
= 0;
1325 has_line_numbers
= 0;
1329 prev_so_symnum
= symnum
;
1331 /* End the current partial symtab and start a new one. */
1333 namestring
= set_namestring (objfile
, &nlist
);
1335 /* Null name means end of .o file. Don't start a new one. */
1336 if (*namestring
== '\000')
1339 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1340 The first one is a directory name; the second the file name.
1341 If pst exists, is empty, and has a filename ending in '/',
1342 we assume the previous N_SO was a directory name. */
1344 p
= lbasename (namestring
);
1345 if (p
!= namestring
&& *p
== '\000')
1347 /* Save the directory name SOs locally, then save it into
1348 the psymtab when it's created below. */
1349 dirname_nso
= namestring
;
1353 /* Some other compilers (C++ ones in particular) emit useless
1354 SOs for non-existant .c files. We ignore all subsequent SOs
1355 that immediately follow the first. */
1359 pst
= start_psymtab (objfile
,
1361 first_so_symnum
* symbol_size
,
1362 objfile
->global_psymbols
,
1363 objfile
->static_psymbols
);
1364 pst
->dirname
= dirname_nso
;
1372 enum language tmp_language
;
1374 /* Add this bincl to the bincl_list for future EXCLs. No
1375 need to save the string; it'll be around until
1376 read_dbx_symtab function returns. */
1378 namestring
= set_namestring (objfile
, &nlist
);
1379 tmp_language
= deduce_language_from_filename (namestring
);
1381 /* Only change the psymtab's language if we've learned
1382 something useful (eg. tmp_language is not language_unknown).
1383 In addition, to match what start_subfile does, never change
1385 if (tmp_language
!= language_unknown
1386 && (tmp_language
!= language_c
1387 || psymtab_language
!= language_cplus
))
1388 psymtab_language
= tmp_language
;
1392 /* FIXME: we should not get here without a PST to work on.
1393 Attempt to recover. */
1394 complaint (&symfile_complaints
,
1395 _("N_BINCL %s not in entries for "
1396 "any file, at symtab pos %d"),
1397 namestring
, symnum
);
1400 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1402 /* Mark down an include file in the current psymtab. */
1404 goto record_include_file
;
1409 enum language tmp_language
;
1411 /* Mark down an include file in the current psymtab. */
1412 namestring
= set_namestring (objfile
, &nlist
);
1413 tmp_language
= deduce_language_from_filename (namestring
);
1415 /* Only change the psymtab's language if we've learned
1416 something useful (eg. tmp_language is not language_unknown).
1417 In addition, to match what start_subfile does, never change
1419 if (tmp_language
!= language_unknown
1420 && (tmp_language
!= language_c
1421 || psymtab_language
!= language_cplus
))
1422 psymtab_language
= tmp_language
;
1424 /* In C++, one may expect the same filename to come round many
1425 times, when code is coming alternately from the main file
1426 and from inline functions in other files. So I check to see
1427 if this is a file we've seen before -- either the main
1428 source file, or a previously included file.
1430 This seems to be a lot of time to be spending on N_SOL, but
1431 things like "break c-exp.y:435" need to work (I
1432 suppose the psymtab_include_list could be hashed or put
1433 in a binary tree, if profiling shows this is a major hog). */
1434 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
1439 for (i
= 0; i
< includes_used
; i
++)
1440 if (filename_cmp (namestring
, psymtab_include_list
[i
]) == 0)
1449 record_include_file
:
1451 psymtab_include_list
[includes_used
++] = namestring
;
1452 if (includes_used
>= includes_allocated
)
1454 const char **orig
= psymtab_include_list
;
1456 psymtab_include_list
= (const char **)
1457 alloca ((includes_allocated
*= 2) * sizeof (const char *));
1458 memcpy (psymtab_include_list
, orig
,
1459 includes_used
* sizeof (const char *));
1463 case N_LSYM
: /* Typedef or automatic variable. */
1464 case N_STSYM
: /* Data seg var -- static. */
1465 case N_LCSYM
: /* BSS " */
1466 case N_ROSYM
: /* Read-only data seg var -- static. */
1467 case N_NBSTS
: /* Gould nobase. */
1468 case N_NBLCS
: /* symbols. */
1470 case N_GSYM
: /* Global (extern) variable; can be
1471 data or bss (sigh FIXME). */
1473 /* Following may probably be ignored; I'll leave them here
1474 for now (until I do Pascal and Modula 2 extensions). */
1476 case N_PC
: /* I may or may not need this; I
1478 case N_M2C
: /* I suspect that I can ignore this here. */
1479 case N_SCOPE
: /* Same. */
1483 namestring
= set_namestring (objfile
, &nlist
);
1485 /* See if this is an end of function stab. */
1486 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1490 /* It's value is the size (in bytes) of the function for
1491 function relative stabs, or the address of the function's
1492 end for old style stabs. */
1493 valu
= nlist
.n_value
+ last_function_start
;
1494 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1495 pst
->texthigh
= valu
;
1499 p
= (char *) strchr (namestring
, ':');
1501 continue; /* Not a debugging symbol. */
1504 sym_name
= NULL
; /* pacify "gcc -Werror" */
1505 if (psymtab_language
== language_cplus
)
1507 std::string
name (namestring
, p
- namestring
);
1508 std::string new_name
= cp_canonicalize_string (name
.c_str ());
1509 if (!new_name
.empty ())
1511 sym_len
= new_name
.length ();
1512 sym_name
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
1520 sym_name
= namestring
;
1521 sym_len
= p
- namestring
;
1524 /* Main processing section for debugging symbols which
1525 the initial read through the symbol tables needs to worry
1526 about. If we reach this point, the symbol which we are
1527 considering is definitely one we are interested in.
1528 p must also contain the (valid) index into the namestring
1529 which indicates the debugging type symbol. */
1534 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1537 if (gdbarch_static_transform_name_p (gdbarch
))
1538 gdbarch_static_transform_name (gdbarch
, namestring
);
1540 add_psymbol_to_list (sym_name
, sym_len
, 1,
1541 VAR_DOMAIN
, LOC_STATIC
,
1542 &objfile
->static_psymbols
,
1543 nlist
.n_value
, psymtab_language
, objfile
);
1547 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1549 /* The addresses in these entries are reported to be
1550 wrong. See the code that reads 'G's for symtabs. */
1551 add_psymbol_to_list (sym_name
, sym_len
, 1,
1552 VAR_DOMAIN
, LOC_STATIC
,
1553 &objfile
->global_psymbols
,
1554 nlist
.n_value
, psymtab_language
, objfile
);
1558 /* When a 'T' entry is defining an anonymous enum, it
1559 may have a name which is the empty string, or a
1560 single space. Since they're not really defining a
1561 symbol, those shouldn't go in the partial symbol
1562 table. We do pick up the elements of such enums at
1563 'check_enum:', below. */
1564 if (p
>= namestring
+ 2
1565 || (p
== namestring
+ 1
1566 && namestring
[0] != ' '))
1568 add_psymbol_to_list (sym_name
, sym_len
, 1,
1569 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1570 &objfile
->static_psymbols
,
1571 0, psymtab_language
, objfile
);
1574 /* Also a typedef with the same name. */
1575 add_psymbol_to_list (sym_name
, sym_len
, 1,
1576 VAR_DOMAIN
, LOC_TYPEDEF
,
1577 &objfile
->static_psymbols
,
1578 0, psymtab_language
, objfile
);
1585 if (p
!= namestring
) /* a name is there, not just :T... */
1587 add_psymbol_to_list (sym_name
, sym_len
, 1,
1588 VAR_DOMAIN
, LOC_TYPEDEF
,
1589 &objfile
->static_psymbols
,
1590 0, psymtab_language
, objfile
);
1593 /* If this is an enumerated type, we need to
1594 add all the enum constants to the partial symbol
1595 table. This does not cover enums without names, e.g.
1596 "enum {a, b} c;" in C, but fortunately those are
1597 rare. There is no way for GDB to find those from the
1598 enum type without spending too much time on it. Thus
1599 to solve this problem, the compiler needs to put out the
1600 enum in a nameless type. GCC2 does this. */
1602 /* We are looking for something of the form
1603 <name> ":" ("t" | "T") [<number> "="] "e"
1604 {<constant> ":" <value> ","} ";". */
1606 /* Skip over the colon and the 't' or 'T'. */
1608 /* This type may be given a number. Also, numbers can come
1609 in pairs like (0,26). Skip over it. */
1610 while ((*p
>= '0' && *p
<= '9')
1611 || *p
== '(' || *p
== ',' || *p
== ')'
1617 /* The aix4 compiler emits extra crud before the members. */
1620 /* Skip over the type (?). */
1624 /* Skip over the colon. */
1628 /* We have found an enumerated type. */
1629 /* According to comments in read_enum_type
1630 a comma could end it instead of a semicolon.
1631 I don't know where that happens.
1633 while (*p
&& *p
!= ';' && *p
!= ',')
1637 /* Check for and handle cretinous dbx symbol name
1639 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1640 p
= next_symbol_text (objfile
);
1642 /* Point to the character after the name
1643 of the enum constant. */
1644 for (q
= p
; *q
&& *q
!= ':'; q
++)
1646 /* Note that the value doesn't matter for
1647 enum constants in psymtabs, just in symtabs. */
1648 add_psymbol_to_list (p
, q
- p
, 1,
1649 VAR_DOMAIN
, LOC_CONST
,
1650 &objfile
->static_psymbols
, 0,
1651 psymtab_language
, objfile
);
1652 /* Point past the name. */
1654 /* Skip over the value. */
1655 while (*p
&& *p
!= ',')
1657 /* Advance past the comma. */
1665 /* Constant, e.g. from "const" in Pascal. */
1666 add_psymbol_to_list (sym_name
, sym_len
, 1,
1667 VAR_DOMAIN
, LOC_CONST
,
1668 &objfile
->static_psymbols
, 0,
1669 psymtab_language
, objfile
);
1675 int name_len
= p
- namestring
;
1676 char *name
= (char *) xmalloc (name_len
+ 1);
1678 memcpy (name
, namestring
, name_len
);
1679 name
[name_len
] = '\0';
1680 function_outside_compilation_unit_complaint (name
);
1683 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1684 SECT_OFF_TEXT (objfile
));
1685 /* Kludges for ELF/STABS with Sun ACC. */
1686 last_function_name
= namestring
;
1687 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1688 value for the bottom of the text seg in those cases. */
1689 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1690 SECT_OFF_TEXT (objfile
))
1691 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1693 CORE_ADDR minsym_valu
=
1694 find_stab_function_addr (namestring
,
1695 pst
? pst
->filename
: NULL
,
1698 /* find_stab_function_addr will return 0 if the minimal
1699 symbol wasn't found. (Unfortunately, this might also
1700 be a valid address.) Anyway, if it *does* return 0,
1701 it is likely that the value was set correctly to begin
1703 if (minsym_valu
!= 0)
1704 nlist
.n_value
= minsym_valu
;
1706 if (pst
&& textlow_not_set
1707 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1709 pst
->textlow
= nlist
.n_value
;
1710 textlow_not_set
= 0;
1714 /* Keep track of the start of the last function so we
1715 can handle end of function symbols. */
1716 last_function_start
= nlist
.n_value
;
1718 /* In reordered executables this function may lie outside
1719 the bounds created by N_SO symbols. If that's the case
1720 use the address of this function as the low bound for
1721 the partial symbol table. */
1724 || (nlist
.n_value
< pst
->textlow
1726 != ANOFFSET (objfile
->section_offsets
,
1727 SECT_OFF_TEXT (objfile
))))))
1729 pst
->textlow
= nlist
.n_value
;
1730 textlow_not_set
= 0;
1732 add_psymbol_to_list (sym_name
, sym_len
, 1,
1733 VAR_DOMAIN
, LOC_BLOCK
,
1734 &objfile
->static_psymbols
,
1735 nlist
.n_value
, psymtab_language
, objfile
);
1738 /* Global functions were ignored here, but now they
1739 are put into the global psymtab like one would expect.
1740 They're also in the minimal symbol table. */
1744 int name_len
= p
- namestring
;
1745 char *name
= (char *) xmalloc (name_len
+ 1);
1747 memcpy (name
, namestring
, name_len
);
1748 name
[name_len
] = '\0';
1749 function_outside_compilation_unit_complaint (name
);
1752 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1753 SECT_OFF_TEXT (objfile
));
1754 /* Kludges for ELF/STABS with Sun ACC. */
1755 last_function_name
= namestring
;
1756 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1757 value for the bottom of the text seg in those cases. */
1758 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1759 SECT_OFF_TEXT (objfile
))
1760 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1762 CORE_ADDR minsym_valu
=
1763 find_stab_function_addr (namestring
,
1764 pst
? pst
->filename
: NULL
,
1767 /* find_stab_function_addr will return 0 if the minimal
1768 symbol wasn't found. (Unfortunately, this might also
1769 be a valid address.) Anyway, if it *does* return 0,
1770 it is likely that the value was set correctly to begin
1772 if (minsym_valu
!= 0)
1773 nlist
.n_value
= minsym_valu
;
1775 if (pst
&& textlow_not_set
1776 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1778 pst
->textlow
= nlist
.n_value
;
1779 textlow_not_set
= 0;
1783 /* Keep track of the start of the last function so we
1784 can handle end of function symbols. */
1785 last_function_start
= nlist
.n_value
;
1787 /* In reordered executables this function may lie outside
1788 the bounds created by N_SO symbols. If that's the case
1789 use the address of this function as the low bound for
1790 the partial symbol table. */
1793 || (nlist
.n_value
< pst
->textlow
1795 != ANOFFSET (objfile
->section_offsets
,
1796 SECT_OFF_TEXT (objfile
))))))
1798 pst
->textlow
= nlist
.n_value
;
1799 textlow_not_set
= 0;
1801 add_psymbol_to_list (sym_name
, sym_len
, 1,
1802 VAR_DOMAIN
, LOC_BLOCK
,
1803 &objfile
->global_psymbols
,
1804 nlist
.n_value
, psymtab_language
, objfile
);
1807 /* Two things show up here (hopefully); static symbols of
1808 local scope (static used inside braces) or extensions
1809 of structure symbols. We can ignore both. */
1823 case '#': /* For symbol identification (used in live ranges). */
1827 /* It is a C++ nested symbol. We don't need to record it
1828 (I don't think); if we try to look up foo::bar::baz,
1829 then symbols for the symtab containing foo should get
1830 read in, I think. */
1831 /* Someone says sun cc puts out symbols like
1832 /foo/baz/maclib::/usr/local/bin/maclib,
1833 which would get here with a symbol type of ':'. */
1837 /* Unexpected symbol descriptor. The second and subsequent stabs
1838 of a continued stab can show up here. The question is
1839 whether they ever can mimic a normal stab--it would be
1840 nice if not, since we certainly don't want to spend the
1841 time searching to the end of every string looking for
1844 complaint (&symfile_complaints
,
1845 _("unknown symbol descriptor `%c'"),
1848 /* Ignore it; perhaps it is an extension that we don't
1856 namestring
= set_namestring (objfile
, &nlist
);
1858 /* Find the corresponding bincl and mark that psymtab on the
1859 psymtab dependency list. */
1861 struct partial_symtab
*needed_pst
=
1862 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
1864 /* If this include file was defined earlier in this file,
1866 if (needed_pst
== pst
)
1874 for (i
= 0; i
< dependencies_used
; i
++)
1875 if (dependency_list
[i
] == needed_pst
)
1881 /* If it's already in the list, skip the rest. */
1885 dependency_list
[dependencies_used
++] = needed_pst
;
1886 if (dependencies_used
>= dependencies_allocated
)
1888 struct partial_symtab
**orig
= dependency_list
;
1891 (struct partial_symtab
**)
1892 alloca ((dependencies_allocated
*= 2)
1893 * sizeof (struct partial_symtab
*));
1894 memcpy (dependency_list
, orig
,
1896 * sizeof (struct partial_symtab
*)));
1898 fprintf_unfiltered (gdb_stderr
,
1899 "Had to reallocate "
1900 "dependency list.\n");
1901 fprintf_unfiltered (gdb_stderr
,
1902 "New dependencies allocated: %d\n",
1903 dependencies_allocated
);
1911 /* Solaris 2 end of module, finish current partial symbol table.
1912 dbx_end_psymtab will set pst->texthigh to the proper value, which
1913 is necessary if a module compiled without debugging info
1914 follows this module. */
1915 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
1917 dbx_end_psymtab (objfile
, pst
,
1918 psymtab_include_list
, includes_used
,
1919 symnum
* symbol_size
,
1920 (CORE_ADDR
) 0, dependency_list
,
1921 dependencies_used
, textlow_not_set
);
1922 pst
= (struct partial_symtab
*) 0;
1924 dependencies_used
= 0;
1925 has_line_numbers
= 0;
1931 HANDLE_RBRAC (nlist
.n_value
);
1937 case N_SSYM
: /* Claim: Structure or union element.
1938 Hopefully, I can ignore this. */
1939 case N_ENTRY
: /* Alternate entry point; can ignore. */
1940 case N_MAIN
: /* Can definitely ignore this. */
1941 case N_CATCH
: /* These are GNU C++ extensions */
1942 case N_EHDECL
: /* that can safely be ignored here. */
1954 case N_NSYMS
: /* Ultrix 4.0: symbol count */
1955 case N_DEFD
: /* GNU Modula-2 */
1956 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
1958 case N_OBJ
: /* Useless types from Solaris. */
1961 /* These symbols aren't interesting; don't worry about them. */
1965 /* If we haven't found it yet, ignore it. It's probably some
1966 new type we don't know about yet. */
1967 unknown_symtype_complaint (hex_string (nlist
.n_type
));
1972 /* If there's stuff to be cleaned up, clean it up. */
1975 /* Don't set pst->texthigh lower than it already is. */
1976 CORE_ADDR text_end
=
1977 (lowest_text_address
== (CORE_ADDR
) -1
1978 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
1979 SECT_OFF_TEXT (objfile
)))
1980 : lowest_text_address
)
1983 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
1984 symnum
* symbol_size
,
1985 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
1986 dependency_list
, dependencies_used
, textlow_not_set
);
1989 do_cleanups (back_to
);
1992 /* Allocate and partially fill a partial symtab. It will be
1993 completely filled at the end of the symbol list.
1995 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1996 is the address relative to which its symbols are (incremental) or 0
1999 static struct partial_symtab
*
2000 start_psymtab (struct objfile
*objfile
, const char *filename
, CORE_ADDR textlow
,
2001 int ldsymoff
, std::vector
<partial_symbol
*> &global_psymbols
,
2002 std::vector
<partial_symbol
*> &static_psymbols
)
2004 struct partial_symtab
*result
=
2005 start_psymtab_common (objfile
, filename
, textlow
,
2006 global_psymbols
, static_psymbols
);
2008 result
->read_symtab_private
=
2009 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2010 LDSYMOFF (result
) = ldsymoff
;
2011 result
->read_symtab
= dbx_read_symtab
;
2012 SYMBOL_SIZE (result
) = symbol_size
;
2013 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2014 STRING_OFFSET (result
) = string_table_offset
;
2015 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2017 /* Deduce the source language from the filename for this psymtab. */
2018 psymtab_language
= deduce_language_from_filename (filename
);
2023 /* Close off the current usage of PST.
2024 Returns PST or NULL if the partial symtab was empty and thrown away.
2026 FIXME: List variables and peculiarities of same. */
2028 struct partial_symtab
*
2029 dbx_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2030 const char **include_list
, int num_includes
,
2031 int capping_symbol_offset
, CORE_ADDR capping_text
,
2032 struct partial_symtab
**dependency_list
,
2033 int number_dependencies
,
2034 int textlow_not_set
)
2037 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2039 if (capping_symbol_offset
!= -1)
2040 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2041 pst
->texthigh
= capping_text
;
2043 /* Under Solaris, the N_SO symbols always have a value of 0,
2044 instead of the usual address of the .o file. Therefore,
2045 we have to do some tricks to fill in texthigh and textlow.
2046 The first trick is: if we see a static
2047 or global function, and the textlow for the current pst
2048 is not set (ie: textlow_not_set), then we use that function's
2049 address for the textlow of the pst. */
2051 /* Now, to fill in texthigh, we remember the last function seen
2052 in the .o file. Also, there's a hack in
2053 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2054 to here via the misc_info field. Therefore, we can fill in
2055 a reliable texthigh by taking the address plus size of the
2056 last function in the file. */
2058 if (pst
->texthigh
== 0 && last_function_name
2059 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2062 struct bound_minimal_symbol minsym
;
2064 const char *colon
= strchr (last_function_name
, ':');
2068 n
= colon
- last_function_name
;
2069 char *p
= (char *) alloca (n
+ 2);
2070 strncpy (p
, last_function_name
, n
);
2073 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2074 if (minsym
.minsym
== NULL
)
2076 /* Sun Fortran appends an underscore to the minimal symbol name,
2077 try again with an appended underscore if the minimal symbol
2081 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2085 pst
->texthigh
= (BMSYMBOL_VALUE_ADDRESS (minsym
)
2086 + MSYMBOL_SIZE (minsym
.minsym
));
2088 last_function_name
= NULL
;
2091 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2093 /* This test will be true if the last .o file is only data. */
2094 else if (textlow_not_set
)
2095 pst
->textlow
= pst
->texthigh
;
2098 struct partial_symtab
*p1
;
2100 /* If we know our own starting text address, then walk through all other
2101 psymtabs for this objfile, and if any didn't know their ending text
2102 address, set it to our starting address. Take care to not set our
2103 own ending address to our starting address, nor to set addresses on
2104 `dependency' files that have both textlow and texthigh zero. */
2106 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2108 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2110 p1
->texthigh
= pst
->textlow
;
2111 /* If this file has only data, then make textlow match
2113 if (p1
->textlow
== 0)
2114 p1
->textlow
= p1
->texthigh
;
2119 /* End of kludge for patching Solaris textlow and texthigh. */
2121 end_psymtab_common (objfile
, pst
);
2123 pst
->number_of_dependencies
= number_dependencies
;
2124 if (number_dependencies
)
2126 pst
->dependencies
= XOBNEWVEC (&objfile
->objfile_obstack
,
2127 struct partial_symtab
*,
2128 number_dependencies
);
2129 memcpy (pst
->dependencies
, dependency_list
,
2130 number_dependencies
* sizeof (struct partial_symtab
*));
2133 pst
->dependencies
= 0;
2135 for (i
= 0; i
< num_includes
; i
++)
2137 struct partial_symtab
*subpst
=
2138 allocate_psymtab (include_list
[i
], objfile
);
2140 subpst
->read_symtab_private
=
2141 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2145 subpst
->texthigh
= 0;
2147 /* We could save slight bits of space by only making one of these,
2148 shared by the entire set of include files. FIXME-someday. */
2149 subpst
->dependencies
=
2150 XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
2151 subpst
->dependencies
[0] = pst
;
2152 subpst
->number_of_dependencies
= 1;
2154 subpst
->globals_offset
=
2155 subpst
->n_global_syms
=
2156 subpst
->statics_offset
=
2157 subpst
->n_static_syms
= 0;
2160 subpst
->compunit_symtab
= 0;
2161 subpst
->read_symtab
= pst
->read_symtab
;
2164 if (num_includes
== 0
2165 && number_dependencies
== 0
2166 && pst
->n_global_syms
== 0
2167 && pst
->n_static_syms
== 0
2168 && has_line_numbers
== 0)
2170 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2171 it is on the obstack, but we can forget to chain it on the list. */
2172 /* Empty psymtabs happen as a result of header files which don't have
2173 any symbols in them. There can be a lot of them. But this check
2174 is wrong, in that a psymtab with N_SLINE entries but nothing else
2175 is not empty, but we don't realize that. Fixing that without slowing
2176 things down might be tricky. */
2178 discard_psymtab (objfile
, pst
);
2180 /* Indicate that psymtab was thrown away. */
2187 dbx_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
2189 struct cleanup
*old_chain
;
2194 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2195 "Shouldn't happen.\n",
2200 /* Read in all partial symtabs on which this one is dependent. */
2201 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2202 if (!pst
->dependencies
[i
]->readin
)
2204 /* Inform about additional files that need to be read in. */
2207 fputs_filtered (" ", gdb_stdout
);
2209 fputs_filtered ("and ", gdb_stdout
);
2211 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2212 wrap_here (""); /* Flush output. */
2213 gdb_flush (gdb_stdout
);
2215 dbx_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
2218 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2220 /* Init stuff necessary for reading in symbols */
2223 old_chain
= make_cleanup (really_free_pendings
, 0);
2224 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2225 symbol_size
= SYMBOL_SIZE (pst
);
2227 /* Read in this file's symbols. */
2228 bfd_seek (objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2229 read_ofile_symtab (objfile
, pst
);
2231 do_cleanups (old_chain
);
2237 /* Read in all of the symbols for a given psymtab for real.
2238 Be verbose about it if the user wants that. SELF is not NULL. */
2241 dbx_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
2245 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2246 "Shouldn't happen.\n",
2251 if (LDSYMLEN (self
) || self
->number_of_dependencies
)
2253 struct cleanup
*back_to
;
2255 /* Print the message now, before reading the string table,
2256 to avoid disconcerting pauses. */
2259 printf_filtered ("Reading in symbols for %s...", self
->filename
);
2260 gdb_flush (gdb_stdout
);
2263 next_symbol_text_func
= dbx_next_symbol_text
;
2265 back_to
= make_cleanup (null_cleanup
, NULL
);
2267 if (DBX_STAB_SECTION (objfile
))
2270 = symfile_relocate_debug_section (objfile
,
2271 DBX_STAB_SECTION (objfile
),
2275 make_cleanup (free_current_contents
, (void *) &stabs_data
);
2278 dbx_psymtab_to_symtab_1 (objfile
, self
);
2280 do_cleanups (back_to
);
2282 /* Match with global symbols. This only needs to be done once,
2283 after all of the symtabs and dependencies have been read in. */
2284 scan_file_globals (objfile
);
2286 /* Finish up the debug error message. */
2288 printf_filtered ("done.\n");
2292 /* Read in a defined section of a specific object file's symbols. */
2295 read_ofile_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
2297 const char *namestring
;
2298 struct external_nlist
*bufp
;
2299 struct internal_nlist nlist
;
2301 unsigned max_symnum
;
2303 int sym_offset
; /* Offset to start of symbols to read */
2304 int sym_size
; /* Size of symbols to read */
2305 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2306 int text_size
; /* Size of text segment for symbols */
2307 struct section_offsets
*section_offsets
;
2309 sym_offset
= LDSYMOFF (pst
);
2310 sym_size
= LDSYMLEN (pst
);
2311 text_offset
= pst
->textlow
;
2312 text_size
= pst
->texthigh
- pst
->textlow
;
2313 section_offsets
= objfile
->section_offsets
;
2315 dbxread_objfile
= objfile
;
2317 stringtab_global
= DBX_STRINGTAB (objfile
);
2318 set_last_source_file (NULL
);
2320 abfd
= objfile
->obfd
;
2321 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2322 symbuf_end
= symbuf_idx
= 0;
2324 symbuf_left
= sym_offset
+ sym_size
;
2326 /* It is necessary to actually read one symbol *before* the start
2327 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2328 occurs before the N_SO symbol.
2330 Detecting this in read_dbx_symtab
2331 would slow down initial readin, so we look for it here instead. */
2332 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2334 stabs_seek (sym_offset
- symbol_size
);
2336 bufp
= &symbuf
[symbuf_idx
++];
2337 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2338 OBJSTAT (objfile
, n_stabs
++);
2340 namestring
= set_namestring (objfile
, &nlist
);
2342 processing_gcc_compilation
= 0;
2343 if (nlist
.n_type
== N_TEXT
)
2345 const char *tempstring
= namestring
;
2347 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2348 processing_gcc_compilation
= 1;
2349 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2350 processing_gcc_compilation
= 2;
2351 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2353 if (startswith (tempstring
, "__gnu_compiled"))
2354 processing_gcc_compilation
= 2;
2359 /* The N_SO starting this symtab is the first symbol, so we
2360 better not check the symbol before it. I'm not this can
2361 happen, but it doesn't hurt to check for it. */
2362 stabs_seek (sym_offset
);
2363 processing_gcc_compilation
= 0;
2366 if (symbuf_idx
== symbuf_end
)
2368 bufp
= &symbuf
[symbuf_idx
];
2369 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2370 error (_("First symbol in segment of executable not a source symbol"));
2372 max_symnum
= sym_size
/ symbol_size
;
2375 symnum
< max_symnum
;
2378 QUIT
; /* Allow this to be interruptable. */
2379 if (symbuf_idx
== symbuf_end
)
2381 bufp
= &symbuf
[symbuf_idx
++];
2382 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2383 OBJSTAT (objfile
, n_stabs
++);
2385 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2387 namestring
= set_namestring (objfile
, &nlist
);
2391 if (sizeof (nlist
.n_value
) > 4
2392 /* We are a 64-bit debugger debugging a 32-bit program. */
2393 && (type
== N_LSYM
|| type
== N_PSYM
))
2394 /* We have to be careful with the n_value in the case of N_LSYM
2395 and N_PSYM entries, because they are signed offsets from frame
2396 pointer, but we actually read them as unsigned 32-bit values.
2397 This is not a problem for 32-bit debuggers, for which negative
2398 values end up being interpreted correctly (as negative
2399 offsets) due to integer overflow.
2400 But we need to sign-extend the value for 64-bit debuggers,
2401 or we'll end up interpreting negative values as very large
2402 positive offsets. */
2403 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2404 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2405 namestring
, section_offsets
, objfile
);
2407 /* We skip checking for a new .o or -l file; that should never
2408 happen in this routine. */
2409 else if (type
== N_TEXT
)
2411 /* I don't think this code will ever be executed, because
2412 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2413 the N_SO symbol which starts this source file.
2414 However, there is no reason not to accept
2415 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2417 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2418 processing_gcc_compilation
= 1;
2419 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2420 processing_gcc_compilation
= 2;
2422 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2423 || type
== (unsigned char) N_NBTEXT
)
2425 /* Global symbol: see if we came across a dbx defintion for
2426 a corresponding symbol. If so, store the value. Remove
2427 syms from the chain when their values are stored, but
2428 search the whole chain, as there may be several syms from
2429 different files with the same name. */
2430 /* This is probably not true. Since the files will be read
2431 in one at a time, each reference to a global symbol will
2432 be satisfied in each file as it appears. So we skip this
2438 /* In a Solaris elf file, this variable, which comes from the
2439 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2440 which comes from pst->textlow is correct. */
2441 if (last_source_start_addr
== 0)
2442 last_source_start_addr
= text_offset
;
2444 /* In reordered executables last_source_start_addr may not be the
2445 lower bound for this symtab, instead use text_offset which comes
2446 from pst->textlow which is correct. */
2447 if (last_source_start_addr
> text_offset
)
2448 last_source_start_addr
= text_offset
;
2450 pst
->compunit_symtab
= end_symtab (text_offset
+ text_size
,
2451 SECT_OFF_TEXT (objfile
));
2455 dbxread_objfile
= NULL
;
2459 /* Record the namespace that the function defined by SYMBOL was
2460 defined in, if necessary. BLOCK is the associated block; use
2461 OBSTACK for allocation. */
2464 cp_set_block_scope (const struct symbol
*symbol
,
2465 struct block
*block
,
2466 struct obstack
*obstack
)
2468 if (SYMBOL_DEMANGLED_NAME (symbol
) != NULL
)
2470 /* Try to figure out the appropriate namespace from the
2473 /* FIXME: carlton/2003-04-15: If the function in question is
2474 a method of a class, the name will actually include the
2475 name of the class as well. This should be harmless, but
2476 is a little unfortunate. */
2478 const char *name
= SYMBOL_DEMANGLED_NAME (symbol
);
2479 unsigned int prefix_len
= cp_entire_prefix_len (name
);
2481 block_set_scope (block
,
2482 (const char *) obstack_copy0 (obstack
, name
, prefix_len
),
2487 /* This handles a single symbol from the symbol-file, building symbols
2488 into a GDB symtab. It takes these arguments and an implicit argument.
2490 TYPE is the type field of the ".stab" symbol entry.
2491 DESC is the desc field of the ".stab" entry.
2492 VALU is the value field of the ".stab" entry.
2493 NAME is the symbol name, in our address space.
2494 SECTION_OFFSETS is a set of amounts by which the sections of this
2495 object file were relocated when it was loaded into memory. Note
2496 that these section_offsets are not the objfile->section_offsets but
2497 the pst->section_offsets. All symbols that refer to memory
2498 locations need to be offset by these amounts.
2499 OBJFILE is the object file from which we are reading symbols. It
2500 is used in end_symtab. */
2503 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, const char *name
,
2504 const struct section_offsets
*section_offsets
,
2505 struct objfile
*objfile
)
2507 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2508 struct context_stack
*newobj
;
2509 /* This remembers the address of the start of a function. It is
2510 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2511 are relative to the current function's start address. On systems
2512 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2513 and is used to relocate these symbol types rather than
2515 static CORE_ADDR function_start_offset
;
2517 /* This holds the address of the start of a function, without the
2518 system peculiarities of function_start_offset. */
2519 static CORE_ADDR last_function_start
;
2521 /* If this is nonzero, we've seen an N_SLINE since the start of the
2522 current function. We use this to tell us to move the first sline
2523 to the beginning of the function regardless of what its given
2525 static int sline_found_in_function
= 1;
2527 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2528 source file. Used to detect the SunPRO solaris compiler. */
2529 static int n_opt_found
;
2531 /* Something is wrong if we see real data before seeing a source
2534 if (get_last_source_file () == NULL
&& type
!= (unsigned char) N_SO
)
2536 /* Ignore any symbols which appear before an N_SO symbol.
2537 Currently no one puts symbols there, but we should deal
2538 gracefully with the case. A complain()t might be in order,
2539 but this should not be an error (). */
2548 if (*name
== '\000')
2550 /* This N_FUN marks the end of a function. This closes off
2551 the current block. */
2552 struct block
*block
;
2554 if (context_stack_depth
<= 0)
2556 lbrac_mismatch_complaint (symnum
);
2560 /* The following check is added before recording line 0 at
2561 end of function so as to handle hand-generated stabs
2562 which may have an N_FUN stabs at the end of the function,
2563 but no N_SLINE stabs. */
2564 if (sline_found_in_function
)
2566 CORE_ADDR addr
= last_function_start
+ valu
;
2568 record_line (current_subfile
, 0,
2569 gdbarch_addr_bits_remove (gdbarch
, addr
));
2572 within_function
= 0;
2573 newobj
= pop_context ();
2575 /* Make a block for the local symbols within. */
2576 block
= finish_block (newobj
->name
, &local_symbols
,
2577 newobj
->old_blocks
, NULL
,
2578 newobj
->start_addr
, newobj
->start_addr
+ valu
);
2580 /* For C++, set the block's scope. */
2581 if (SYMBOL_LANGUAGE (newobj
->name
) == language_cplus
)
2582 cp_set_block_scope (newobj
->name
, block
, &objfile
->objfile_obstack
);
2584 /* May be switching to an assembler file which may not be using
2585 block relative stabs, so reset the offset. */
2586 function_start_offset
= 0;
2591 sline_found_in_function
= 0;
2593 /* Relocate for dynamic loading. */
2594 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2595 valu
= gdbarch_addr_bits_remove (gdbarch
, valu
);
2596 last_function_start
= valu
;
2598 goto define_a_symbol
;
2601 /* This "symbol" just indicates the start of an inner lexical
2602 context within a function. */
2604 /* Ignore extra outermost context from SunPRO cc and acc. */
2605 if (n_opt_found
&& desc
== 1)
2608 valu
+= function_start_offset
;
2610 push_context (desc
, valu
);
2614 /* This "symbol" just indicates the end of an inner lexical
2615 context that was started with N_LBRAC. */
2617 /* Ignore extra outermost context from SunPRO cc and acc. */
2618 if (n_opt_found
&& desc
== 1)
2621 valu
+= function_start_offset
;
2623 if (context_stack_depth
<= 0)
2625 lbrac_mismatch_complaint (symnum
);
2629 newobj
= pop_context ();
2630 if (desc
!= newobj
->depth
)
2631 lbrac_mismatch_complaint (symnum
);
2633 if (local_symbols
!= NULL
)
2635 /* GCC development snapshots from March to December of
2636 2000 would output N_LSYM entries after N_LBRAC
2637 entries. As a consequence, these symbols are simply
2638 discarded. Complain if this is the case. */
2639 complaint (&symfile_complaints
,
2640 _("misplaced N_LBRAC entry; discarding local "
2641 "symbols which have no enclosing block"));
2643 local_symbols
= newobj
->locals
;
2645 if (context_stack_depth
> 1)
2647 /* This is not the outermost LBRAC...RBRAC pair in the
2648 function, its local symbols preceded it, and are the ones
2649 just recovered from the context stack. Define the block
2650 for them (but don't bother if the block contains no
2651 symbols. Should we complain on blocks without symbols?
2652 I can't think of any useful purpose for them). */
2653 if (local_symbols
!= NULL
)
2655 /* Muzzle a compiler bug that makes end < start.
2657 ??? Which compilers? Is this ever harmful?. */
2658 if (newobj
->start_addr
> valu
)
2660 complaint (&symfile_complaints
,
2661 _("block start larger than block end"));
2662 newobj
->start_addr
= valu
;
2664 /* Make a block for the local symbols within. */
2665 finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
2666 newobj
->start_addr
, valu
);
2671 /* This is the outermost LBRAC...RBRAC pair. There is no
2672 need to do anything; leave the symbols that preceded it
2673 to be attached to the function's own block. We need to
2674 indicate that we just moved outside of the function. */
2675 within_function
= 0;
2682 /* This kind of symbol indicates the start of an object file.
2683 Relocate for dynamic loading. */
2684 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2688 /* This type of symbol indicates the start of data for one
2689 source file. Finish the symbol table of the previous source
2690 file (if any) and start accumulating a new symbol table.
2691 Relocate for dynamic loading. */
2692 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2696 if (get_last_source_file ())
2698 /* Check if previous symbol was also an N_SO (with some
2699 sanity checks). If so, that one was actually the
2700 directory name, and the current one is the real file
2701 name. Patch things up. */
2702 if (previous_stab_code
== (unsigned char) N_SO
)
2704 patch_subfile_names (current_subfile
, name
);
2705 break; /* Ignore repeated SOs. */
2707 end_symtab (valu
, SECT_OFF_TEXT (objfile
));
2711 /* Null name means this just marks the end of text for this .o
2712 file. Don't start a new symtab in this case. */
2713 if (*name
== '\000')
2716 function_start_offset
= 0;
2719 start_symtab (objfile
, name
, NULL
, valu
);
2720 record_debugformat ("stabs");
2724 /* This type of symbol indicates the start of data for a
2725 sub-source-file, one whose contents were copied or included
2726 in the compilation of the main source file (whose name was
2727 given in the N_SO symbol). Relocate for dynamic loading. */
2728 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2729 start_subfile (name
);
2734 add_new_header_file (name
, valu
);
2735 start_subfile (name
);
2739 start_subfile (pop_subfile ());
2743 add_old_header_file (name
, valu
);
2747 /* This type of "symbol" really just records one line-number --
2748 core-address correspondence. Enter it in the line list for
2749 this symbol table. */
2751 /* Relocate for dynamic loading and for ELF acc
2752 function-relative symbols. */
2753 valu
+= function_start_offset
;
2755 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
2756 middle of the prologue instead of right at the start of the
2757 function. To deal with this we record the address for the
2758 first N_SLINE stab to be the start of the function instead of
2759 the listed location. We really shouldn't to this. When
2760 compiling with optimization, this first N_SLINE stab might be
2761 optimized away. Other (non-GCC) compilers don't emit this
2762 stab at all. There is no real harm in having an extra
2763 numbered line, although it can be a bit annoying for the
2764 user. However, it totally screws up our testsuite.
2766 So for now, keep adjusting the address of the first N_SLINE
2767 stab, but only for code compiled with GCC. */
2769 if (within_function
&& sline_found_in_function
== 0)
2771 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
2772 last_function_start
: valu
;
2774 record_line (current_subfile
, desc
,
2775 gdbarch_addr_bits_remove (gdbarch
, addr
));
2776 sline_found_in_function
= 1;
2779 record_line (current_subfile
, desc
,
2780 gdbarch_addr_bits_remove (gdbarch
, valu
));
2784 common_block_start (name
, objfile
);
2788 common_block_end (objfile
);
2791 /* The following symbol types need to have the appropriate
2792 offset added to their value; then we process symbol
2793 definitions in the name. */
2795 case N_STSYM
: /* Static symbol in data segment. */
2796 case N_LCSYM
: /* Static symbol in BSS segment. */
2797 case N_ROSYM
: /* Static symbol in read-only data segment. */
2798 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2799 Solaris 2's stabs-in-elf makes *most* symbols relative but
2800 leaves a few absolute (at least for Solaris 2.1 and version
2801 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
2802 the fence. .stab "foo:S...",N_STSYM is absolute (ld
2803 relocates it) .stab "foo:V...",N_STSYM is relative (section
2804 base subtracted). This leaves us no choice but to search for
2805 the 'S' or 'V'... (or pass the whole section_offsets stuff
2806 down ONE MORE function call level, which we really don't want
2811 /* Normal object file and NLMs have non-zero text seg offsets,
2812 but don't need their static syms offset in this fashion.
2813 XXX - This is really a crock that should be fixed in the
2814 solib handling code so that I don't have to work around it
2817 if (!symfile_relocatable
)
2819 p
= strchr (name
, ':');
2820 if (p
!= 0 && p
[1] == 'S')
2822 /* The linker relocated it. We don't want to add a
2823 Sun-stabs Tfoo.foo-like offset, but we *do*
2824 want to add whatever solib.c passed to
2825 symbol_file_add as addr (this is known to affect
2826 SunOS 4, and I suspect ELF too). Since there is no
2827 Ttext.text symbol, we can get addr from the text offset. */
2828 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2829 goto define_a_symbol
;
2832 /* Since it's not the kludge case, re-dispatch to the right
2843 internal_error (__FILE__
, __LINE__
,
2844 _("failed internal consistency check"));
2848 case_N_STSYM
: /* Static symbol in data segment. */
2849 case N_DSLINE
: /* Source line number, data segment. */
2850 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
2851 goto define_a_symbol
;
2853 case_N_LCSYM
: /* Static symbol in BSS segment. */
2854 case N_BSLINE
: /* Source line number, BSS segment. */
2855 /* N_BROWS: overlaps with N_BSLINE. */
2856 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
2857 goto define_a_symbol
;
2859 case_N_ROSYM
: /* Static symbol in read-only data segment. */
2860 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
2861 goto define_a_symbol
;
2863 case N_ENTRY
: /* Alternate entry point. */
2864 /* Relocate for dynamic loading. */
2865 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2866 goto define_a_symbol
;
2868 /* The following symbol types we don't know how to process.
2869 Handle them in a "default" way, but complain to people who
2872 case N_CATCH
: /* Exception handler catcher. */
2873 case N_EHDECL
: /* Exception handler name. */
2874 case N_PC
: /* Global symbol in Pascal. */
2875 case N_M2C
: /* Modula-2 compilation unit. */
2876 /* N_MOD2: overlaps with N_EHDECL. */
2877 case N_SCOPE
: /* Modula-2 scope information. */
2878 case N_ECOML
: /* End common (local name). */
2879 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
2884 unknown_symtype_complaint (hex_string (type
));
2887 /* The following symbol types don't need the address field
2888 relocated, since it is either unused, or is absolute. */
2890 case N_GSYM
: /* Global variable. */
2891 case N_NSYMS
: /* Number of symbols (Ultrix). */
2892 case N_NOMAP
: /* No map? (Ultrix). */
2893 case N_RSYM
: /* Register variable. */
2894 case N_DEFD
: /* Modula-2 GNU module dependency. */
2895 case N_SSYM
: /* Struct or union element. */
2896 case N_LSYM
: /* Local symbol in stack. */
2897 case N_PSYM
: /* Parameter variable. */
2898 case N_LENG
: /* Length of preceding symbol type. */
2902 const char *colon_pos
= strchr (name
, ':');
2904 if (colon_pos
== NULL
)
2907 deftype
= colon_pos
[1];
2913 /* Deal with the SunPRO 3.0 compiler which omits the
2914 address from N_FUN symbols. */
2916 && valu
== ANOFFSET (section_offsets
,
2917 SECT_OFF_TEXT (objfile
))
2918 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2920 CORE_ADDR minsym_valu
=
2921 find_stab_function_addr (name
, get_last_source_file (),
2924 /* The function find_stab_function_addr will return
2925 0 if the minimal symbol wasn't found.
2926 (Unfortunately, this might also be a valid
2927 address.) Anyway, if it *does* return 0, it is
2928 likely that the value was set correctly to begin
2930 if (minsym_valu
!= 0)
2934 /* These addresses are absolute. */
2935 function_start_offset
= valu
;
2937 within_function
= 1;
2939 if (context_stack_depth
> 1)
2941 complaint (&symfile_complaints
,
2942 _("unmatched N_LBRAC before symtab pos %d"),
2947 if (context_stack_depth
> 0)
2949 struct block
*block
;
2951 newobj
= pop_context ();
2952 /* Make a block for the local symbols within. */
2953 block
= finish_block (newobj
->name
, &local_symbols
,
2954 newobj
->old_blocks
, NULL
,
2955 newobj
->start_addr
, valu
);
2957 /* For C++, set the block's scope. */
2958 if (SYMBOL_LANGUAGE (newobj
->name
) == language_cplus
)
2959 cp_set_block_scope (newobj
->name
, block
,
2960 &objfile
->objfile_obstack
);
2963 newobj
= push_context (0, valu
);
2964 newobj
->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
2968 define_symbol (valu
, name
, desc
, type
, objfile
);
2974 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2975 for a bunch of other flags, too. Someday we may parse their
2976 flags; for now we ignore theirs and hope they'll ignore ours. */
2977 case N_OPT
: /* Solaris 2: Compiler options. */
2980 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2982 processing_gcc_compilation
= 2;
2989 case N_MAIN
: /* Name of main routine. */
2990 /* FIXME: If one has a symbol file with N_MAIN and then replaces
2991 it with a symbol file with "main" and without N_MAIN. I'm
2992 not sure exactly what rule to follow but probably something
2993 like: N_MAIN takes precedence over "main" no matter what
2994 objfile it is in; If there is more than one N_MAIN, choose
2995 the one in the symfile_objfile; If there is more than one
2996 N_MAIN within a given objfile, complain() and choose
2997 arbitrarily. (kingdon) */
2999 set_objfile_main_name (objfile
, name
, language_unknown
);
3002 /* The following symbol types can be ignored. */
3003 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3004 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3005 /* N_UNDF: Solaris 2: File separator mark. */
3006 /* N_UNDF: -- we will never encounter it, since we only process
3007 one file's symbols at once. */
3008 case N_ENDM
: /* Solaris 2: End of module. */
3009 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3013 /* '#' is a GNU C extension to allow one symbol to refer to another
3016 Generally this is used so that an alias can refer to its main
3021 /* Initialize symbol reference names and determine if this is a
3022 definition. If a symbol reference is being defined, go ahead
3023 and add it. Otherwise, just return. */
3025 const char *s
= name
;
3028 /* If this stab defines a new reference ID that is not on the
3029 reference list, then put it on the reference list.
3031 We go ahead and advance NAME past the reference, even though
3032 it is not strictly necessary at this time. */
3033 refnum
= symbol_reference_defined (&s
);
3035 if (!ref_search (refnum
))
3036 ref_add (refnum
, 0, name
, valu
);
3040 previous_stab_code
= type
;
3043 /* FIXME: The only difference between this and elfstab_build_psymtabs
3044 is the call to install_minimal_symbols for elf, and the support for
3045 split sections. If the differences are really that small, the code
3046 should be shared. */
3048 /* Scan and build partial symbols for an coff symbol file.
3049 The coff file has already been processed to get its minimal symbols.
3051 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3054 OBJFILE is the object file we are reading symbols from.
3055 ADDR is the address relative to which the symbols are (e.g.
3056 the base address of the text segment).
3057 TEXTADDR is the address of the text section.
3058 TEXTSIZE is the size of the text section.
3059 STABSECTS is the list of .stab sections in OBJFILE.
3060 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3061 .stabstr section exists.
3063 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3064 adjusted for coff details. */
3067 coffstab_build_psymtabs (struct objfile
*objfile
,
3068 CORE_ADDR textaddr
, unsigned int textsize
,
3069 struct stab_section_list
*stabsects
,
3070 file_ptr stabstroffset
, unsigned int stabstrsize
)
3073 bfd
*sym_bfd
= objfile
->obfd
;
3074 char *name
= bfd_get_filename (sym_bfd
);
3075 unsigned int stabsize
;
3077 DBX_TEXT_ADDR (objfile
) = textaddr
;
3078 DBX_TEXT_SIZE (objfile
) = textsize
;
3080 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3081 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3082 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3084 if (stabstrsize
> bfd_get_size (sym_bfd
))
3085 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3086 DBX_STRINGTAB (objfile
) = (char *)
3087 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3088 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3090 /* Now read in the string table in one big gulp. */
3092 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3094 perror_with_name (name
);
3095 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3096 if (val
!= stabstrsize
)
3097 perror_with_name (name
);
3099 stabsread_new_init ();
3100 buildsym_new_init ();
3101 free_header_files ();
3102 init_header_files ();
3104 processing_acc_compilation
= 1;
3106 /* In a coff file, we've already installed the minimal symbols that came
3107 from the coff (non-stab) symbol table, so always act like an
3108 incremental load here. */
3109 if (stabsects
->next
== NULL
)
3111 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3112 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3113 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3117 struct stab_section_list
*stabsect
;
3119 DBX_SYMCOUNT (objfile
) = 0;
3120 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3122 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3123 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3126 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3128 symbuf_sections
= stabsects
->next
;
3129 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3133 dbx_symfile_read (objfile
, 0);
3136 /* Scan and build partial symbols for an ELF symbol file.
3137 This ELF file has already been processed to get its minimal symbols.
3139 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3142 OBJFILE is the object file we are reading symbols from.
3143 ADDR is the address relative to which the symbols are (e.g.
3144 the base address of the text segment).
3145 STABSECT is the BFD section information for the .stab section.
3146 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3147 .stabstr section exists.
3149 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3150 adjusted for elf details. */
3153 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
3154 file_ptr stabstroffset
, unsigned int stabstrsize
)
3157 bfd
*sym_bfd
= objfile
->obfd
;
3158 char *name
= bfd_get_filename (sym_bfd
);
3159 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
3161 /* Find the first and last text address. dbx_symfile_read seems to
3163 find_text_range (sym_bfd
, objfile
);
3165 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3166 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3167 DBX_SYMCOUNT (objfile
)
3168 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3169 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3170 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3171 DBX_STAB_SECTION (objfile
) = stabsect
;
3173 if (stabstrsize
> bfd_get_size (sym_bfd
))
3174 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3175 DBX_STRINGTAB (objfile
) = (char *)
3176 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3177 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3179 /* Now read in the string table in one big gulp. */
3181 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3183 perror_with_name (name
);
3184 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3185 if (val
!= stabstrsize
)
3186 perror_with_name (name
);
3188 stabsread_new_init ();
3189 buildsym_new_init ();
3190 free_header_files ();
3191 init_header_files ();
3193 processing_acc_compilation
= 1;
3196 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3197 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3199 make_cleanup (free_current_contents
, (void *) &stabs_data
);
3201 /* In an elf file, we've already installed the minimal symbols that came
3202 from the elf (non-stab) symbol table, so always act like an
3203 incremental load here. dbx_symfile_read should not generate any new
3204 minimal symbols, since we will have already read the ELF dynamic symbol
3205 table and normal symbol entries won't be in the ".stab" section; but in
3206 case it does, it will install them itself. */
3207 dbx_symfile_read (objfile
, 0);
3209 do_cleanups (back_to
);
3212 /* Scan and build partial symbols for a file with special sections for stabs
3213 and stabstrings. The file has already been processed to get its minimal
3214 symbols, and any other symbols that might be necessary to resolve GSYMs.
3216 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3219 OBJFILE is the object file we are reading symbols from.
3220 ADDR is the address relative to which the symbols are (e.g. the base address
3221 of the text segment).
3222 STAB_NAME is the name of the section that contains the stabs.
3223 STABSTR_NAME is the name of the section that contains the stab strings.
3225 This routine is mostly copied from dbx_symfile_init and
3226 dbx_symfile_read. */
3229 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3230 char *stabstr_name
, char *text_name
)
3233 bfd
*sym_bfd
= objfile
->obfd
;
3234 char *name
= bfd_get_filename (sym_bfd
);
3236 asection
*stabstrsect
;
3237 asection
*text_sect
;
3238 struct dbx_symfile_info
*dbx
;
3240 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3241 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3247 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3248 "but not string section (%s)"),
3249 stab_name
, stabstr_name
);
3251 dbx
= XCNEW (struct dbx_symfile_info
);
3252 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
3254 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3256 error (_("Can't find %s section in symbol file"), text_name
);
3257 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3258 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3260 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3261 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3262 / DBX_SYMBOL_SIZE (objfile
);
3263 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3264 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING
3268 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3269 error (_("ridiculous string table size: %d bytes"),
3270 DBX_STRINGTAB_SIZE (objfile
));
3271 DBX_STRINGTAB (objfile
) = (char *)
3272 obstack_alloc (&objfile
->objfile_obstack
,
3273 DBX_STRINGTAB_SIZE (objfile
) + 1);
3274 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3276 /* Now read in the string table in one big gulp. */
3278 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3279 stabstrsect
, /* bfd section */
3280 DBX_STRINGTAB (objfile
), /* input buffer */
3281 0, /* offset into section */
3282 DBX_STRINGTAB_SIZE (objfile
)); /* amount to
3286 perror_with_name (name
);
3288 stabsread_new_init ();
3289 buildsym_new_init ();
3290 free_header_files ();
3291 init_header_files ();
3293 /* Now, do an incremental load. */
3295 processing_acc_compilation
= 1;
3296 dbx_symfile_read (objfile
, 0);
3299 static const struct sym_fns aout_sym_fns
=
3301 dbx_new_init
, /* init anything gbl to entire symtab */
3302 dbx_symfile_init
, /* read initial info, setup for sym_read() */
3303 dbx_symfile_read
, /* read a symbol file into symtab */
3304 NULL
, /* sym_read_psymbols */
3305 dbx_symfile_finish
, /* finished with file, cleanup */
3306 default_symfile_offsets
, /* parse user's offsets to internal form */
3307 default_symfile_segments
, /* Get segment information from a file. */
3309 default_symfile_relocate
, /* Relocate a debug section. */
3310 NULL
, /* sym_probe_fns */
3315 _initialize_dbxread (void)
3317 add_symtab_fns (bfd_target_aout_flavour
, &aout_sym_fns
);
3319 dbx_objfile_data_key
3320 = register_objfile_data_with_cleanup (NULL
, dbx_free_symfile_info
);