1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004.
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 /* This module provides three functions: dbx_symfile_init,
22 which initializes to read a symbol file; dbx_new_init, which
23 discards existing cached information when all symbols are being
24 discarded; and dbx_symfile_read, which reads a symbol table
27 dbx_symfile_read only does the minimum work necessary for letting the
28 user "name" things symbolically; it does not read the entire symtab.
29 Instead, it reads the external and static symbols and puts them in partial
30 symbol tables. When more extensive information is requested of a
31 file, the corresponding partial symbol table is mutated into a full
32 fledged symbol table by going back and reading the symbols
33 for real. dbx_psymtab_to_symtab() is the function that does this */
36 #include "gdb_string.h"
38 #if defined(__CYGNUSCLIB__)
39 #include <sys/types.h>
43 #include "gdb_obstack.h"
46 #include "breakpoint.h"
48 #include "gdbcore.h" /* for bfd stuff */
49 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
52 #include "stabsread.h"
53 #include "gdb-stabs.h"
55 #include "complaints.h"
58 #include "gdb_assert.h"
59 #include "gdb_string.h"
61 #include "aout/aout64.h"
62 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
65 /* We put a pointer to this structure in the read_symtab_private field
70 /* Offset within the file symbol table of first local symbol for this
75 /* Length (in bytes) of the section of the symbol table devoted to
76 this file's symbols (actually, the section bracketed may contain
77 more than just this file's symbols). If ldsymlen is 0, the only
78 reason for this thing's existence is the dependency list. Nothing
79 else will happen when it is read in. */
83 /* The size of each symbol in the symbol file (in external form). */
87 /* Further information needed to locate the symbols if they are in
92 int file_string_offset
;
95 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
96 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
97 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
98 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
99 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
100 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
101 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
104 /* Remember what we deduced to be the source language of this psymtab. */
106 static enum language psymtab_language
= language_unknown
;
108 /* The BFD for this file -- implicit parameter to next_symbol_text. */
110 static bfd
*symfile_bfd
;
112 /* The size of each symbol in the symbol file (in external form).
113 This is set by dbx_symfile_read when building psymtabs, and by
114 dbx_psymtab_to_symtab when building symtabs. */
116 static unsigned symbol_size
;
118 /* This is the offset of the symbol table in the executable file. */
120 static unsigned symbol_table_offset
;
122 /* This is the offset of the string table in the executable file. */
124 static unsigned string_table_offset
;
126 /* For elf+stab executables, the n_strx field is not a simple index
127 into the string table. Instead, each .o file has a base offset in
128 the string table, and the associated symbols contain offsets from
129 this base. The following two variables contain the base offset for
130 the current and next .o files. */
132 static unsigned int file_string_table_offset
;
133 static unsigned int next_file_string_table_offset
;
135 /* .o and NLM files contain unrelocated addresses which are based at
136 0. When non-zero, this flag disables some of the special cases for
137 Solaris elf+stab text addresses at location 0. */
139 static int symfile_relocatable
= 0;
141 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
142 relative to the function start address. */
144 static int block_address_function_relative
= 0;
146 /* The lowest text address we have yet encountered. This is needed
147 because in an a.out file, there is no header field which tells us
148 what address the program is actually going to be loaded at, so we
149 need to make guesses based on the symbols (which *are* relocated to
150 reflect the address it will be loaded at). */
152 static CORE_ADDR lowest_text_address
;
154 /* Non-zero if there is any line number info in the objfile. Prevents
155 end_psymtab from discarding an otherwise empty psymtab. */
157 static int has_line_numbers
;
159 /* Complaints about the symbols we have encountered. */
162 unknown_symtype_complaint (const char *arg1
)
164 complaint (&symfile_complaints
, _("unknown symbol type %s"), arg1
);
168 lbrac_mismatch_complaint (int arg1
)
170 complaint (&symfile_complaints
,
171 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1
);
175 repeated_header_complaint (const char *arg1
, int arg2
)
177 complaint (&symfile_complaints
,
178 _("\"repeated\" header file %s not previously seen, at symtab pos %d"),
182 /* find_text_range --- find start and end of loadable code sections
184 The find_text_range function finds the shortest address range that
185 encloses all sections containing executable code, and stores it in
186 objfile's text_addr and text_size members.
188 dbx_symfile_read will use this to finish off the partial symbol
189 table, in some cases. */
192 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
199 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
200 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
202 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
203 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
207 if (sec_start
< start
)
222 error (_("Can't find any code sections in symbol file"));
224 DBX_TEXT_ADDR (objfile
) = start
;
225 DBX_TEXT_SIZE (objfile
) = end
- start
;
230 /* During initial symbol readin, we need to have a structure to keep
231 track of which psymtabs have which bincls in them. This structure
232 is used during readin to setup the list of dependencies within each
233 partial symbol table. */
235 struct header_file_location
237 char *name
; /* Name of header file */
238 int instance
; /* See above */
239 struct partial_symtab
*pst
; /* Partial symtab that has the
240 BINCL/EINCL defs for this file */
243 /* The actual list and controling variables */
244 static struct header_file_location
*bincl_list
, *next_bincl
;
245 static int bincls_allocated
;
247 /* Local function prototypes */
249 extern void _initialize_dbxread (void);
251 static void read_ofile_symtab (struct partial_symtab
*);
253 static void dbx_psymtab_to_symtab (struct partial_symtab
*);
255 static void dbx_psymtab_to_symtab_1 (struct partial_symtab
*);
257 static void read_dbx_dynamic_symtab (struct objfile
*objfile
);
259 static void read_dbx_symtab (struct objfile
*);
261 static void free_bincl_list (struct objfile
*);
263 static struct partial_symtab
*find_corresponding_bincl_psymtab (char *, int);
265 static void add_bincl_to_list (struct partial_symtab
*, char *, int);
267 static void init_bincl_list (int, struct objfile
*);
269 static char *dbx_next_symbol_text (struct objfile
*);
271 static void fill_symbuf (bfd
*);
273 static void dbx_symfile_init (struct objfile
*);
275 static void dbx_new_init (struct objfile
*);
277 static void dbx_symfile_read (struct objfile
*, int);
279 static void dbx_symfile_finish (struct objfile
*);
281 static void record_minimal_symbol (char *, CORE_ADDR
, int, struct objfile
*);
283 static void add_new_header_file (char *, int);
285 static void add_old_header_file (char *, int);
287 static void add_this_object_header_file (int);
289 static struct partial_symtab
*start_psymtab (struct objfile
*, char *,
291 struct partial_symbol
**,
292 struct partial_symbol
**);
294 /* Free up old header file tables */
297 free_header_files (void)
299 if (this_object_header_files
)
301 xfree (this_object_header_files
);
302 this_object_header_files
= NULL
;
304 n_allocated_this_object_header_files
= 0;
307 /* Allocate new header file tables */
310 init_header_files (void)
312 n_allocated_this_object_header_files
= 10;
313 this_object_header_files
= (int *) xmalloc (10 * sizeof (int));
316 /* Add header file number I for this object file
317 at the next successive FILENUM. */
320 add_this_object_header_file (int i
)
322 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
324 n_allocated_this_object_header_files
*= 2;
325 this_object_header_files
326 = (int *) xrealloc ((char *) this_object_header_files
,
327 n_allocated_this_object_header_files
* sizeof (int));
330 this_object_header_files
[n_this_object_header_files
++] = i
;
333 /* Add to this file an "old" header file, one already seen in
334 a previous object file. NAME is the header file's name.
335 INSTANCE is its instance code, to select among multiple
336 symbol tables for the same header file. */
339 add_old_header_file (char *name
, int instance
)
341 struct header_file
*p
= HEADER_FILES (current_objfile
);
344 for (i
= 0; i
< N_HEADER_FILES (current_objfile
); i
++)
345 if (strcmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
347 add_this_object_header_file (i
);
350 repeated_header_complaint (name
, symnum
);
353 /* Add to this file a "new" header file: definitions for its types follow.
354 NAME is the header file's name.
355 Most often this happens only once for each distinct header file,
356 but not necessarily. If it happens more than once, INSTANCE has
357 a different value each time, and references to the header file
358 use INSTANCE values to select among them.
360 dbx output contains "begin" and "end" markers for each new header file,
361 but at this level we just need to know which files there have been;
362 so we record the file when its "begin" is seen and ignore the "end". */
365 add_new_header_file (char *name
, int instance
)
368 struct header_file
*hfile
;
370 /* Make sure there is room for one more header file. */
372 i
= N_ALLOCATED_HEADER_FILES (current_objfile
);
374 if (N_HEADER_FILES (current_objfile
) == i
)
378 N_ALLOCATED_HEADER_FILES (current_objfile
) = 10;
379 HEADER_FILES (current_objfile
) = (struct header_file
*)
380 xmalloc (10 * sizeof (struct header_file
));
385 N_ALLOCATED_HEADER_FILES (current_objfile
) = i
;
386 HEADER_FILES (current_objfile
) = (struct header_file
*)
387 xrealloc ((char *) HEADER_FILES (current_objfile
),
388 (i
* sizeof (struct header_file
)));
392 /* Create an entry for this header file. */
394 i
= N_HEADER_FILES (current_objfile
)++;
395 hfile
= HEADER_FILES (current_objfile
) + i
;
396 hfile
->name
= savestring (name
, strlen (name
));
397 hfile
->instance
= instance
;
400 = (struct type
**) xmalloc (10 * sizeof (struct type
*));
401 memset (hfile
->vector
, 0, 10 * sizeof (struct type
*));
403 add_this_object_header_file (i
);
407 static struct type
**
408 explicit_lookup_type (int real_filenum
, int index
)
410 struct header_file
*f
= &HEADER_FILES (current_objfile
)[real_filenum
];
412 if (index
>= f
->length
)
415 f
->vector
= (struct type
**)
416 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
417 memset (&f
->vector
[f
->length
/ 2],
418 '\0', f
->length
* sizeof (struct type
*) / 2);
420 return &f
->vector
[index
];
425 record_minimal_symbol (char *name
, CORE_ADDR address
, int type
,
426 struct objfile
*objfile
)
428 enum minimal_symbol_type ms_type
;
430 asection
*bfd_section
;
436 section
= SECT_OFF_TEXT (objfile
);
437 bfd_section
= DBX_TEXT_SECTION (objfile
);
441 section
= SECT_OFF_DATA (objfile
);
442 bfd_section
= DBX_DATA_SECTION (objfile
);
446 section
= SECT_OFF_BSS (objfile
);
447 bfd_section
= DBX_BSS_SECTION (objfile
);
457 section
= SECT_OFF_DATA (objfile
);
458 bfd_section
= DBX_DATA_SECTION (objfile
);
461 /* I don't think this type actually exists; since a N_SETV is the result
462 of going over many .o files, it doesn't make sense to have one
464 ms_type
= mst_file_data
;
465 section
= SECT_OFF_DATA (objfile
);
466 bfd_section
= DBX_DATA_SECTION (objfile
);
473 ms_type
= mst_file_text
;
474 section
= SECT_OFF_TEXT (objfile
);
475 bfd_section
= DBX_TEXT_SECTION (objfile
);
478 ms_type
= mst_file_data
;
480 /* Check for __DYNAMIC, which is used by Sun shared libraries.
481 Record it as global even if it's local, not global, so
482 lookup_minimal_symbol can find it. We don't check symbol_leading_char
483 because for SunOS4 it always is '_'. */
484 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
487 /* Same with virtual function tables, both global and static. */
489 char *tempstring
= name
;
490 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
492 if (is_vtable_name (tempstring
))
495 section
= SECT_OFF_DATA (objfile
);
496 bfd_section
= DBX_DATA_SECTION (objfile
);
499 ms_type
= mst_file_bss
;
500 section
= SECT_OFF_BSS (objfile
);
501 bfd_section
= DBX_BSS_SECTION (objfile
);
504 ms_type
= mst_unknown
;
510 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
511 && address
< lowest_text_address
)
512 lowest_text_address
= address
;
514 prim_record_minimal_symbol_and_info
515 (name
, address
, ms_type
, NULL
, section
, bfd_section
, objfile
);
518 /* Scan and build partial symbols for a symbol file.
519 We have been initialized by a call to dbx_symfile_init, which
520 put all the relevant info into a "struct dbx_symfile_info",
521 hung off the objfile structure.
523 MAINLINE is true if we are reading the main symbol
524 table (as opposed to a shared lib or dynamically loaded file). */
527 dbx_symfile_read (struct objfile
*objfile
, int mainline
)
531 struct cleanup
*back_to
;
533 sym_bfd
= objfile
->obfd
;
535 /* .o and .nlm files are relocatables with text, data and bss segs based at
536 0. This flag disables special (Solaris stabs-in-elf only) fixups for
537 symbols with a value of 0. */
539 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
541 /* This is true for Solaris (and all other systems which put stabs
542 in sections, hopefully, since it would be silly to do things
543 differently from Solaris), and false for SunOS4 and other a.out
545 block_address_function_relative
=
546 ((0 == strncmp (bfd_get_target (sym_bfd
), "elf", 3))
547 || (0 == strncmp (bfd_get_target (sym_bfd
), "som", 3))
548 || (0 == strncmp (bfd_get_target (sym_bfd
), "coff", 4))
549 || (0 == strncmp (bfd_get_target (sym_bfd
), "pe", 2))
550 || (0 == strncmp (bfd_get_target (sym_bfd
), "epoc-pe", 7))
551 || (0 == strncmp (bfd_get_target (sym_bfd
), "nlm", 3)));
553 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
555 perror_with_name (objfile
->name
);
557 /* If we are reinitializing, or if we have never loaded syms yet, init */
559 || (objfile
->global_psymbols
.size
== 0
560 && objfile
->static_psymbols
.size
== 0))
561 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
563 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
564 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
566 free_pending_blocks ();
567 back_to
= make_cleanup (really_free_pendings
, 0);
569 init_minimal_symbol_collection ();
570 make_cleanup_discard_minimal_symbols ();
572 /* Read stabs data from executable file and define symbols. */
574 read_dbx_symtab (objfile
);
576 /* Add the dynamic symbols. */
578 read_dbx_dynamic_symtab (objfile
);
580 /* Install any minimal symbols that have been collected as the current
581 minimal symbols for this objfile. */
583 install_minimal_symbols (objfile
);
585 do_cleanups (back_to
);
588 /* Initialize anything that needs initializing when a completely new
589 symbol file is specified (not just adding some symbols from another
590 file, e.g. a shared library). */
593 dbx_new_init (struct objfile
*ignore
)
595 stabsread_new_init ();
596 buildsym_new_init ();
597 init_header_files ();
601 /* dbx_symfile_init ()
602 is the dbx-specific initialization routine for reading symbols.
603 It is passed a struct objfile which contains, among other things,
604 the BFD for the file whose symbols are being read, and a slot for a pointer
605 to "private data" which we fill with goodies.
607 We read the string table into malloc'd space and stash a pointer to it.
609 Since BFD doesn't know how to read debug symbols in a format-independent
610 way (and may never do so...), we have to do it ourselves. We will never
611 be called unless this is an a.out (or very similar) file.
612 FIXME, there should be a cleaner peephole into the BFD environment here. */
614 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
617 dbx_symfile_init (struct objfile
*objfile
)
620 bfd
*sym_bfd
= objfile
->obfd
;
621 char *name
= bfd_get_filename (sym_bfd
);
623 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
625 /* Allocate struct to keep track of the symfile */
626 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
627 xmalloc (sizeof (struct dbx_symfile_info
));
628 memset (objfile
->deprecated_sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
630 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
631 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
632 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
634 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
635 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
636 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
638 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
640 DBX_SYMFILE_INFO (objfile
)->stab_section_info
= NULL
;
642 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
644 error (_("Can't find .text section in symbol file"));
645 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
646 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
648 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
649 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
650 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
652 /* Read the string table and stash it away in the objfile_obstack.
653 When we blow away the objfile the string table goes away as well.
654 Note that gdb used to use the results of attempting to malloc the
655 string table, based on the size it read, as a form of sanity check
656 for botched byte swapping, on the theory that a byte swapped string
657 table size would be so totally bogus that the malloc would fail. Now
658 that we put in on the objfile_obstack, we can't do this since gdb gets
659 a fatal error (out of virtual memory) if the size is bogus. We can
660 however at least check to see if the size is less than the size of
661 the size field itself, or larger than the size of the entire file.
662 Note that all valid string tables have a size greater than zero, since
663 the bytes used to hold the size are included in the count. */
665 if (STRING_TABLE_OFFSET
== 0)
667 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
668 will never be zero, even when there is no string table. This
669 would appear to be a bug in bfd. */
670 DBX_STRINGTAB_SIZE (objfile
) = 0;
671 DBX_STRINGTAB (objfile
) = NULL
;
675 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
677 perror_with_name (name
);
679 memset (size_temp
, 0, sizeof (size_temp
));
680 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
683 perror_with_name (name
);
687 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
688 EOF if there is no string table, and attempting to read the size
689 from EOF will read zero bytes. */
690 DBX_STRINGTAB_SIZE (objfile
) = 0;
691 DBX_STRINGTAB (objfile
) = NULL
;
695 /* Read some data that would appear to be the string table size.
696 If there really is a string table, then it is probably the right
697 size. Byteswap if necessary and validate the size. Note that
698 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
699 random data that happened to be at STRING_TABLE_OFFSET, because
700 bfd can't tell us there is no string table, the sanity checks may
701 or may not catch this. */
702 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
704 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
705 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
706 error (_("ridiculous string table size (%d bytes)."),
707 DBX_STRINGTAB_SIZE (objfile
));
709 DBX_STRINGTAB (objfile
) =
710 (char *) obstack_alloc (&objfile
->objfile_obstack
,
711 DBX_STRINGTAB_SIZE (objfile
));
712 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
714 /* Now read in the string table in one big gulp. */
716 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
718 perror_with_name (name
);
719 val
= bfd_bread (DBX_STRINGTAB (objfile
),
720 DBX_STRINGTAB_SIZE (objfile
),
722 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
723 perror_with_name (name
);
728 /* Perform any local cleanups required when we are done with a particular
729 objfile. I.E, we are in the process of discarding all symbol information
730 for an objfile, freeing up all memory held for it, and unlinking the
731 objfile struct from the global list of known objfiles. */
734 dbx_symfile_finish (struct objfile
*objfile
)
736 if (objfile
->deprecated_sym_stab_info
!= NULL
)
738 if (HEADER_FILES (objfile
) != NULL
)
740 int i
= N_HEADER_FILES (objfile
);
741 struct header_file
*hfiles
= HEADER_FILES (objfile
);
745 xfree (hfiles
[i
].name
);
746 xfree (hfiles
[i
].vector
);
750 xfree (objfile
->deprecated_sym_stab_info
);
752 free_header_files ();
756 /* Buffer for reading the symbol table entries. */
757 static struct external_nlist symbuf
[4096];
758 static int symbuf_idx
;
759 static int symbuf_end
;
761 /* Name of last function encountered. Used in Solaris to approximate
762 object file boundaries. */
763 static char *last_function_name
;
765 /* The address in memory of the string table of the object file we are
766 reading (which might not be the "main" object file, but might be a
767 shared library or some other dynamically loaded thing). This is
768 set by read_dbx_symtab when building psymtabs, and by
769 read_ofile_symtab when building symtabs, and is used only by
770 next_symbol_text. FIXME: If that is true, we don't need it when
771 building psymtabs, right? */
772 static char *stringtab_global
;
774 /* These variables are used to control fill_symbuf when the stabs
775 symbols are not contiguous (as may be the case when a COFF file is
776 linked using --split-by-reloc). */
777 static struct stab_section_list
*symbuf_sections
;
778 static unsigned int symbuf_left
;
779 static unsigned int symbuf_read
;
781 /* This variable stores a global stabs buffer, if we read stabs into
782 memory in one chunk in order to process relocations. */
783 static bfd_byte
*stabs_data
;
785 /* Refill the symbol table input buffer
786 and set the variables that control fetching entries from it.
787 Reports an error if no data available.
788 This function can read past the end of the symbol table
789 (into the string table) but this does no harm. */
792 fill_symbuf (bfd
*sym_bfd
)
799 nbytes
= sizeof (symbuf
);
800 if (nbytes
> symbuf_left
)
801 nbytes
= symbuf_left
;
802 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
804 else if (symbuf_sections
== NULL
)
806 count
= sizeof (symbuf
);
807 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
811 if (symbuf_left
<= 0)
813 file_ptr filepos
= symbuf_sections
->section
->filepos
;
814 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
815 perror_with_name (bfd_get_filename (sym_bfd
));
816 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
817 symbol_table_offset
= filepos
- symbuf_read
;
818 symbuf_sections
= symbuf_sections
->next
;
822 if (count
> sizeof (symbuf
))
823 count
= sizeof (symbuf
);
824 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
828 perror_with_name (bfd_get_filename (sym_bfd
));
829 else if (nbytes
== 0)
830 error (_("Premature end of file reading symbol table"));
831 symbuf_end
= nbytes
/ symbol_size
;
833 symbuf_left
-= nbytes
;
834 symbuf_read
+= nbytes
;
838 stabs_seek (int sym_offset
)
842 symbuf_read
+= sym_offset
;
843 symbuf_left
-= sym_offset
;
846 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
849 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
851 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
852 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
853 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
854 if (bfd_get_sign_extend_vma (abfd)) \
855 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
857 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
860 /* Invariant: The symbol pointed to by symbuf_idx is the first one
861 that hasn't been swapped. Swap the symbol at the same time
862 that symbuf_idx is incremented. */
864 /* dbx allows the text of a symbol name to be continued into the
865 next symbol name! When such a continuation is encountered
866 (a \ at the end of the text of a name)
867 call this function to get the continuation. */
870 dbx_next_symbol_text (struct objfile
*objfile
)
872 struct internal_nlist nlist
;
874 if (symbuf_idx
== symbuf_end
)
875 fill_symbuf (symfile_bfd
);
878 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
879 OBJSTAT (objfile
, n_stabs
++);
883 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
886 /* Initialize the list of bincls to contain none and have some
890 init_bincl_list (int number
, struct objfile
*objfile
)
892 bincls_allocated
= number
;
893 next_bincl
= bincl_list
= (struct header_file_location
*)
894 xmalloc (bincls_allocated
* sizeof (struct header_file_location
));
897 /* Add a bincl to the list. */
900 add_bincl_to_list (struct partial_symtab
*pst
, char *name
, int instance
)
902 if (next_bincl
>= bincl_list
+ bincls_allocated
)
904 int offset
= next_bincl
- bincl_list
;
905 bincls_allocated
*= 2;
906 bincl_list
= (struct header_file_location
*)
907 xrealloc ((char *) bincl_list
,
908 bincls_allocated
* sizeof (struct header_file_location
));
909 next_bincl
= bincl_list
+ offset
;
911 next_bincl
->pst
= pst
;
912 next_bincl
->instance
= instance
;
913 next_bincl
++->name
= name
;
916 /* Given a name, value pair, find the corresponding
917 bincl in the list. Return the partial symtab associated
918 with that header_file_location. */
920 static struct partial_symtab
*
921 find_corresponding_bincl_psymtab (char *name
, int instance
)
923 struct header_file_location
*bincl
;
925 for (bincl
= bincl_list
; bincl
< next_bincl
; bincl
++)
926 if (bincl
->instance
== instance
927 && strcmp (name
, bincl
->name
) == 0)
930 repeated_header_complaint (name
, symnum
);
931 return (struct partial_symtab
*) 0;
934 /* Free the storage allocated for the bincl list. */
937 free_bincl_list (struct objfile
*objfile
)
940 bincls_allocated
= 0;
944 do_free_bincl_list_cleanup (void *objfile
)
946 free_bincl_list (objfile
);
949 static struct cleanup
*
950 make_cleanup_free_bincl_list (struct objfile
*objfile
)
952 return make_cleanup (do_free_bincl_list_cleanup
, objfile
);
955 /* Set namestring based on nlist. If the string table index is invalid,
956 give a fake name, and print a single error message per symbol file read,
957 rather than abort the symbol reading or flood the user with messages. */
960 set_namestring (struct objfile
*objfile
, struct internal_nlist nlist
)
964 if (((unsigned) nlist
.n_strx
+ file_string_table_offset
) >=
965 DBX_STRINGTAB_SIZE (objfile
))
967 complaint (&symfile_complaints
, _("bad string table offset in symbol %d"),
969 namestring
= "<bad string table offset>";
972 namestring
= nlist
.n_strx
+ file_string_table_offset
+
973 DBX_STRINGTAB (objfile
);
977 /* Scan a SunOs dynamic symbol table for symbols of interest and
978 add them to the minimal symbol table. */
981 read_dbx_dynamic_symtab (struct objfile
*objfile
)
983 bfd
*abfd
= objfile
->obfd
;
984 struct cleanup
*back_to
;
997 /* Check that the symbol file has dynamic symbols that we know about.
998 bfd_arch_unknown can happen if we are reading a sun3 symbol file
999 on a sun4 host (and vice versa) and bfd is not configured
1000 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1001 so we ignore the dynamic symbols in this case. */
1002 if (bfd_get_flavour (abfd
) != bfd_target_aout_flavour
1003 || (bfd_get_file_flags (abfd
) & DYNAMIC
) == 0
1004 || bfd_get_arch (abfd
) == bfd_arch_unknown
)
1007 dynsym_size
= bfd_get_dynamic_symtab_upper_bound (abfd
);
1008 if (dynsym_size
< 0)
1011 dynsyms
= (asymbol
**) xmalloc (dynsym_size
);
1012 back_to
= make_cleanup (xfree
, dynsyms
);
1014 dynsym_count
= bfd_canonicalize_dynamic_symtab (abfd
, dynsyms
);
1015 if (dynsym_count
< 0)
1017 do_cleanups (back_to
);
1021 /* Enter dynamic symbols into the minimal symbol table
1022 if this is a stripped executable. */
1023 if (bfd_get_symcount (abfd
) <= 0)
1026 for (counter
= 0; counter
< dynsym_count
; counter
++, symptr
++)
1028 asymbol
*sym
= *symptr
;
1032 sec
= bfd_get_section (sym
);
1034 /* BFD symbols are section relative. */
1035 sym_value
= sym
->value
+ sec
->vma
;
1037 if (bfd_get_section_flags (abfd
, sec
) & SEC_CODE
)
1039 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1042 else if (bfd_get_section_flags (abfd
, sec
) & SEC_DATA
)
1044 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1047 else if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
1049 sym_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS (objfile
));
1055 if (sym
->flags
& BSF_GLOBAL
)
1058 record_minimal_symbol ((char *) bfd_asymbol_name (sym
), sym_value
,
1063 /* Symbols from shared libraries have a dynamic relocation entry
1064 that points to the associated slot in the procedure linkage table.
1065 We make a mininal symbol table entry with type mst_solib_trampoline
1066 at the address in the procedure linkage table. */
1067 dynrel_size
= bfd_get_dynamic_reloc_upper_bound (abfd
);
1068 if (dynrel_size
< 0)
1070 do_cleanups (back_to
);
1074 dynrels
= (arelent
**) xmalloc (dynrel_size
);
1075 make_cleanup (xfree
, dynrels
);
1077 dynrel_count
= bfd_canonicalize_dynamic_reloc (abfd
, dynrels
, dynsyms
);
1078 if (dynrel_count
< 0)
1080 do_cleanups (back_to
);
1084 for (counter
= 0, relptr
= dynrels
;
1085 counter
< dynrel_count
;
1086 counter
++, relptr
++)
1088 arelent
*rel
= *relptr
;
1090 rel
->address
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1092 switch (bfd_get_arch (abfd
))
1094 case bfd_arch_sparc
:
1095 if (rel
->howto
->type
!= RELOC_JMP_SLOT
)
1099 /* `16' is the type BFD produces for a jump table relocation. */
1100 if (rel
->howto
->type
!= 16)
1103 /* Adjust address in the jump table to point to
1104 the start of the bsr instruction. */
1111 name
= (char *) bfd_asymbol_name (*rel
->sym_ptr_ptr
);
1112 prim_record_minimal_symbol (name
, address
, mst_solib_trampoline
,
1116 do_cleanups (back_to
);
1119 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1121 find_stab_function_addr (char *namestring
, char *filename
,
1122 struct objfile
*objfile
)
1124 struct minimal_symbol
*msym
;
1128 p
= strchr (namestring
, ':');
1133 strncpy (p
, namestring
, n
);
1136 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1139 /* Sun Fortran appends an underscore to the minimal symbol name,
1140 try again with an appended underscore if the minimal symbol
1144 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
1147 if (msym
== NULL
&& filename
!= NULL
)
1149 /* Try again without the filename. */
1151 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1153 if (msym
== NULL
&& filename
!= NULL
)
1155 /* And try again for Sun Fortran, but without the filename. */
1158 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
1161 return msym
== NULL
? 0 : SYMBOL_VALUE_ADDRESS (msym
);
1163 #endif /* SOFUN_ADDRESS_MAYBE_MISSING */
1166 function_outside_compilation_unit_complaint (const char *arg1
)
1168 complaint (&symfile_complaints
,
1169 _("function `%s' appears to be defined outside of all compilation units"),
1173 /* Setup partial_symtab's describing each source file for which
1174 debugging information is available. */
1177 read_dbx_symtab (struct objfile
*objfile
)
1179 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch */
1180 struct internal_nlist nlist
;
1181 CORE_ADDR text_addr
;
1186 int past_first_source_file
= 0;
1187 CORE_ADDR last_o_file_start
= 0;
1188 CORE_ADDR last_function_start
= 0;
1189 struct cleanup
*back_to
;
1191 int textlow_not_set
;
1192 int data_sect_index
;
1194 /* Current partial symtab */
1195 struct partial_symtab
*pst
;
1197 /* List of current psymtab's include files */
1198 char **psymtab_include_list
;
1199 int includes_allocated
;
1202 /* Index within current psymtab dependency list */
1203 struct partial_symtab
**dependency_list
;
1204 int dependencies_used
, dependencies_allocated
;
1206 text_addr
= DBX_TEXT_ADDR (objfile
);
1207 text_size
= DBX_TEXT_SIZE (objfile
);
1209 /* FIXME. We probably want to change stringtab_global rather than add this
1210 while processing every symbol entry. FIXME. */
1211 file_string_table_offset
= 0;
1212 next_file_string_table_offset
= 0;
1214 stringtab_global
= DBX_STRINGTAB (objfile
);
1216 pst
= (struct partial_symtab
*) 0;
1218 includes_allocated
= 30;
1220 psymtab_include_list
= (char **) alloca (includes_allocated
*
1223 dependencies_allocated
= 30;
1224 dependencies_used
= 0;
1226 (struct partial_symtab
**) alloca (dependencies_allocated
*
1227 sizeof (struct partial_symtab
*));
1229 /* Init bincl list */
1230 init_bincl_list (20, objfile
);
1231 back_to
= make_cleanup_free_bincl_list (objfile
);
1233 last_source_file
= NULL
;
1235 lowest_text_address
= (CORE_ADDR
) -1;
1237 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol */
1238 abfd
= objfile
->obfd
;
1239 symbuf_end
= symbuf_idx
= 0;
1240 next_symbol_text_func
= dbx_next_symbol_text
;
1241 textlow_not_set
= 1;
1242 has_line_numbers
= 0;
1244 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1245 to global and static variables. The stab for a global or static
1246 variable doesn't give us any indication of which section it's in,
1247 so we can't tell immediately which offset in
1248 objfile->section_offsets we should apply to the variable's
1251 We could certainly find out which section contains the variable
1252 by looking up the variable's unrelocated address with
1253 find_pc_section, but that would be expensive; this is the
1254 function that constructs the partial symbol tables by examining
1255 every symbol in the entire executable, and it's
1256 performance-critical. So that expense would not be welcome. I'm
1257 not sure what to do about this at the moment.
1259 What we have done for years is to simply assume that the .data
1260 section's offset is appropriate for all global and static
1261 variables. Recently, this was expanded to fall back to the .bss
1262 section's offset if there is no .data section, and then to the
1263 .rodata section's offset. */
1264 data_sect_index
= objfile
->sect_index_data
;
1265 if (data_sect_index
== -1)
1266 data_sect_index
= SECT_OFF_BSS (objfile
);
1267 if (data_sect_index
== -1)
1268 data_sect_index
= SECT_OFF_RODATA (objfile
);
1270 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1271 for the file to have no .data, no .bss, and no .text at all, if
1272 it also has no global or static variables. If it does, we will
1273 get an internal error from an ANOFFSET macro below when we try to
1274 use data_sect_index. */
1276 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1278 /* Get the symbol for this run and pull out some info */
1279 QUIT
; /* allow this to be interruptable */
1280 if (symbuf_idx
== symbuf_end
)
1282 bufp
= &symbuf
[symbuf_idx
++];
1285 * Special case to speed up readin.
1287 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1289 has_line_numbers
= 1;
1293 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1294 OBJSTAT (objfile
, n_stabs
++);
1296 /* Ok. There is a lot of code duplicated in the rest of this
1297 switch statement (for efficiency reasons). Since I don't
1298 like duplicating code, I will do my penance here, and
1299 describe the code which is duplicated:
1301 *) The assignment to namestring.
1302 *) The call to strchr.
1303 *) The addition of a partial symbol the the two partial
1304 symbol lists. This last is a large section of code, so
1305 I've imbedded it in the following macro.
1308 switch (nlist
.n_type
)
1312 * Standard, external, non-debugger, symbols
1315 case N_TEXT
| N_EXT
:
1316 case N_NBTEXT
| N_EXT
:
1317 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1320 case N_DATA
| N_EXT
:
1321 case N_NBDATA
| N_EXT
:
1322 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1327 case N_NBBSS
| N_EXT
:
1328 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1329 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS (objfile
));
1334 namestring
= set_namestring (objfile
, nlist
);
1337 record_minimal_symbol (namestring
, nlist
.n_value
,
1338 nlist
.n_type
, objfile
); /* Always */
1341 /* Standard, local, non-debugger, symbols */
1345 /* We need to be able to deal with both N_FN or N_TEXT,
1346 because we have no way of knowing whether the sys-supplied ld
1347 or GNU ld was used to make the executable. Sequents throw
1348 in another wrinkle -- they renumbered N_FN. */
1353 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1354 namestring
= set_namestring (objfile
, nlist
);
1356 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1357 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1358 && namestring
[nsl
- 2] == '.'))
1360 if (past_first_source_file
&& pst
1361 /* The gould NP1 uses low values for .o and -l symbols
1362 which are not the address. */
1363 && nlist
.n_value
>= pst
->textlow
)
1365 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1366 symnum
* symbol_size
,
1367 nlist
.n_value
> pst
->texthigh
1368 ? nlist
.n_value
: pst
->texthigh
,
1369 dependency_list
, dependencies_used
, textlow_not_set
);
1370 pst
= (struct partial_symtab
*) 0;
1372 dependencies_used
= 0;
1375 past_first_source_file
= 1;
1376 last_o_file_start
= nlist
.n_value
;
1383 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
1386 case N_UNDF
| N_EXT
:
1387 if (nlist
.n_value
!= 0)
1389 /* This is a "Fortran COMMON" symbol. See if the target
1390 environment knows where it has been relocated to. */
1394 namestring
= set_namestring (objfile
, nlist
);
1395 if (target_lookup_symbol (namestring
, &reladdr
))
1397 continue; /* Error in lookup; ignore symbol for now. */
1399 nlist
.n_type
^= (N_BSS
^ N_UNDF
); /* Define it as a bss-symbol */
1400 nlist
.n_value
= reladdr
;
1401 goto bss_ext_symbol
;
1403 continue; /* Just undefined, not COMMON */
1406 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1408 /* Deal with relative offsets in the string table
1409 used in ELF+STAB under Solaris. If we want to use the
1410 n_strx field, which contains the name of the file,
1411 we must adjust file_string_table_offset *before* calling
1412 set_namestring(). */
1413 past_first_source_file
= 1;
1414 file_string_table_offset
= next_file_string_table_offset
;
1415 next_file_string_table_offset
=
1416 file_string_table_offset
+ nlist
.n_value
;
1417 if (next_file_string_table_offset
< file_string_table_offset
)
1418 error (_("string table offset backs up at %d"), symnum
);
1419 /* FIXME -- replace error() with complaint. */
1424 /* Lots of symbol types we can just ignore. */
1431 /* Keep going . . . */
1434 * Special symbol types for GNU
1437 case N_INDR
| N_EXT
:
1439 case N_SETA
| N_EXT
:
1441 case N_SETT
| N_EXT
:
1443 case N_SETD
| N_EXT
:
1445 case N_SETB
| N_EXT
:
1456 static int prev_so_symnum
= -10;
1457 static int first_so_symnum
;
1459 static char *dirname_nso
;
1460 int prev_textlow_not_set
;
1462 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1464 prev_textlow_not_set
= textlow_not_set
;
1466 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1467 /* A zero value is probably an indication for the SunPRO 3.0
1468 compiler. end_psymtab explicitly tests for zero, so
1469 don't relocate it. */
1471 if (nlist
.n_value
== 0)
1473 textlow_not_set
= 1;
1477 textlow_not_set
= 0;
1479 textlow_not_set
= 0;
1481 past_first_source_file
= 1;
1483 if (prev_so_symnum
!= symnum
- 1)
1484 { /* Here if prev stab wasn't N_SO */
1485 first_so_symnum
= symnum
;
1489 end_psymtab (pst
, psymtab_include_list
, includes_used
,
1490 symnum
* symbol_size
,
1491 valu
> pst
->texthigh
? valu
: pst
->texthigh
,
1492 dependency_list
, dependencies_used
,
1493 prev_textlow_not_set
);
1494 pst
= (struct partial_symtab
*) 0;
1496 dependencies_used
= 0;
1500 prev_so_symnum
= symnum
;
1502 /* End the current partial symtab and start a new one */
1504 namestring
= set_namestring (objfile
, nlist
);
1506 /* Null name means end of .o file. Don't start a new one. */
1507 if (*namestring
== '\000')
1510 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1511 The first one is a directory name; the second the file name.
1512 If pst exists, is empty, and has a filename ending in '/',
1513 we assume the previous N_SO was a directory name. */
1515 p
= strrchr (namestring
, '/');
1516 if (p
&& *(p
+ 1) == '\000')
1518 /* Save the directory name SOs locally, then save it into
1519 the psymtab when it's created below. */
1520 dirname_nso
= namestring
;
1524 /* Some other compilers (C++ ones in particular) emit useless
1525 SOs for non-existant .c files. We ignore all subsequent SOs that
1526 immediately follow the first. */
1530 pst
= start_psymtab (objfile
,
1532 first_so_symnum
* symbol_size
,
1533 objfile
->global_psymbols
.next
,
1534 objfile
->static_psymbols
.next
);
1535 pst
->dirname
= dirname_nso
;
1543 enum language tmp_language
;
1544 /* Add this bincl to the bincl_list for future EXCLs. No
1545 need to save the string; it'll be around until
1546 read_dbx_symtab function returns */
1548 namestring
= set_namestring (objfile
, nlist
);
1549 tmp_language
= deduce_language_from_filename (namestring
);
1551 /* Only change the psymtab's language if we've learned
1552 something useful (eg. tmp_language is not language_unknown).
1553 In addition, to match what start_subfile does, never change
1555 if (tmp_language
!= language_unknown
1556 && (tmp_language
!= language_c
1557 || psymtab_language
!= language_cplus
))
1558 psymtab_language
= tmp_language
;
1562 /* FIXME: we should not get here without a PST to work on.
1563 Attempt to recover. */
1564 complaint (&symfile_complaints
,
1565 _("N_BINCL %s not in entries for any file, at symtab pos %d"),
1566 namestring
, symnum
);
1569 add_bincl_to_list (pst
, namestring
, nlist
.n_value
);
1571 /* Mark down an include file in the current psymtab */
1573 goto record_include_file
;
1578 enum language tmp_language
;
1579 /* Mark down an include file in the current psymtab */
1581 namestring
= set_namestring (objfile
, nlist
);
1582 tmp_language
= deduce_language_from_filename (namestring
);
1584 /* Only change the psymtab's language if we've learned
1585 something useful (eg. tmp_language is not language_unknown).
1586 In addition, to match what start_subfile does, never change
1588 if (tmp_language
!= language_unknown
1589 && (tmp_language
!= language_c
1590 || psymtab_language
!= language_cplus
))
1591 psymtab_language
= tmp_language
;
1593 /* In C++, one may expect the same filename to come round many
1594 times, when code is coming alternately from the main file
1595 and from inline functions in other files. So I check to see
1596 if this is a file we've seen before -- either the main
1597 source file, or a previously included file.
1599 This seems to be a lot of time to be spending on N_SOL, but
1600 things like "break c-exp.y:435" need to work (I
1601 suppose the psymtab_include_list could be hashed or put
1602 in a binary tree, if profiling shows this is a major hog). */
1603 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
1607 for (i
= 0; i
< includes_used
; i
++)
1608 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
1617 record_include_file
:
1619 psymtab_include_list
[includes_used
++] = namestring
;
1620 if (includes_used
>= includes_allocated
)
1622 char **orig
= psymtab_include_list
;
1624 psymtab_include_list
= (char **)
1625 alloca ((includes_allocated
*= 2) *
1627 memcpy (psymtab_include_list
, orig
,
1628 includes_used
* sizeof (char *));
1632 case N_LSYM
: /* Typedef or automatic variable. */
1633 case N_STSYM
: /* Data seg var -- static */
1634 case N_LCSYM
: /* BSS " */
1635 case N_ROSYM
: /* Read-only data seg var -- static. */
1636 case N_NBSTS
: /* Gould nobase. */
1637 case N_NBLCS
: /* symbols. */
1639 case N_GSYM
: /* Global (extern) variable; can be
1640 data or bss (sigh FIXME). */
1642 /* Following may probably be ignored; I'll leave them here
1643 for now (until I do Pascal and Modula 2 extensions). */
1645 case N_PC
: /* I may or may not need this; I
1647 case N_M2C
: /* I suspect that I can ignore this here. */
1648 case N_SCOPE
: /* Same. */
1650 namestring
= set_namestring (objfile
, nlist
);
1652 /* See if this is an end of function stab. */
1653 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1657 /* It's value is the size (in bytes) of the function for
1658 function relative stabs, or the address of the function's
1659 end for old style stabs. */
1660 valu
= nlist
.n_value
+ last_function_start
;
1661 if (pst
->texthigh
== 0 || valu
> pst
->texthigh
)
1662 pst
->texthigh
= valu
;
1666 p
= (char *) strchr (namestring
, ':');
1668 continue; /* Not a debugging symbol. */
1672 /* Main processing section for debugging symbols which
1673 the initial read through the symbol tables needs to worry
1674 about. If we reach this point, the symbol which we are
1675 considering is definitely one we are interested in.
1676 p must also contain the (valid) index into the namestring
1677 which indicates the debugging type symbol. */
1682 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, data_sect_index
);
1683 #ifdef STATIC_TRANSFORM_NAME
1684 namestring
= STATIC_TRANSFORM_NAME (namestring
);
1686 add_psymbol_to_list (namestring
, p
- namestring
,
1687 VAR_DOMAIN
, LOC_STATIC
,
1688 &objfile
->static_psymbols
,
1690 psymtab_language
, objfile
);
1693 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
, data_sect_index
);
1694 /* The addresses in these entries are reported to be
1695 wrong. See the code that reads 'G's for symtabs. */
1696 add_psymbol_to_list (namestring
, p
- namestring
,
1697 VAR_DOMAIN
, LOC_STATIC
,
1698 &objfile
->global_psymbols
,
1700 psymtab_language
, objfile
);
1704 /* When a 'T' entry is defining an anonymous enum, it
1705 may have a name which is the empty string, or a
1706 single space. Since they're not really defining a
1707 symbol, those shouldn't go in the partial symbol
1708 table. We do pick up the elements of such enums at
1709 'check_enum:', below. */
1710 if (p
>= namestring
+ 2
1711 || (p
== namestring
+ 1
1712 && namestring
[0] != ' '))
1714 add_psymbol_to_list (namestring
, p
- namestring
,
1715 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1716 &objfile
->static_psymbols
,
1718 psymtab_language
, objfile
);
1721 /* Also a typedef with the same name. */
1722 add_psymbol_to_list (namestring
, p
- namestring
,
1723 VAR_DOMAIN
, LOC_TYPEDEF
,
1724 &objfile
->static_psymbols
,
1726 psymtab_language
, objfile
);
1732 if (p
!= namestring
) /* a name is there, not just :T... */
1734 add_psymbol_to_list (namestring
, p
- namestring
,
1735 VAR_DOMAIN
, LOC_TYPEDEF
,
1736 &objfile
->static_psymbols
,
1738 psymtab_language
, objfile
);
1741 /* If this is an enumerated type, we need to
1742 add all the enum constants to the partial symbol
1743 table. This does not cover enums without names, e.g.
1744 "enum {a, b} c;" in C, but fortunately those are
1745 rare. There is no way for GDB to find those from the
1746 enum type without spending too much time on it. Thus
1747 to solve this problem, the compiler needs to put out the
1748 enum in a nameless type. GCC2 does this. */
1750 /* We are looking for something of the form
1751 <name> ":" ("t" | "T") [<number> "="] "e"
1752 {<constant> ":" <value> ","} ";". */
1754 /* Skip over the colon and the 't' or 'T'. */
1756 /* This type may be given a number. Also, numbers can come
1757 in pairs like (0,26). Skip over it. */
1758 while ((*p
>= '0' && *p
<= '9')
1759 || *p
== '(' || *p
== ',' || *p
== ')'
1765 /* The aix4 compiler emits extra crud before the members. */
1768 /* Skip over the type (?). */
1772 /* Skip over the colon. */
1776 /* We have found an enumerated type. */
1777 /* According to comments in read_enum_type
1778 a comma could end it instead of a semicolon.
1779 I don't know where that happens.
1781 while (*p
&& *p
!= ';' && *p
!= ',')
1785 /* Check for and handle cretinous dbx symbol name
1787 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1788 p
= next_symbol_text (objfile
);
1790 /* Point to the character after the name
1791 of the enum constant. */
1792 for (q
= p
; *q
&& *q
!= ':'; q
++)
1794 /* Note that the value doesn't matter for
1795 enum constants in psymtabs, just in symtabs. */
1796 add_psymbol_to_list (p
, q
- p
,
1797 VAR_DOMAIN
, LOC_CONST
,
1798 &objfile
->static_psymbols
, 0,
1799 0, psymtab_language
, objfile
);
1800 /* Point past the name. */
1802 /* Skip over the value. */
1803 while (*p
&& *p
!= ',')
1805 /* Advance past the comma. */
1812 /* Constant, e.g. from "const" in Pascal. */
1813 add_psymbol_to_list (namestring
, p
- namestring
,
1814 VAR_DOMAIN
, LOC_CONST
,
1815 &objfile
->static_psymbols
, nlist
.n_value
,
1816 0, psymtab_language
, objfile
);
1822 int name_len
= p
- namestring
;
1823 char *name
= xmalloc (name_len
+ 1);
1824 memcpy (name
, namestring
, name_len
);
1825 name
[name_len
] = '\0';
1826 function_outside_compilation_unit_complaint (name
);
1829 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1830 SECT_OFF_TEXT (objfile
));
1831 /* Kludges for ELF/STABS with Sun ACC */
1832 last_function_name
= namestring
;
1833 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1834 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1835 value for the bottom of the text seg in those cases. */
1836 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1837 SECT_OFF_TEXT (objfile
)))
1839 CORE_ADDR minsym_valu
=
1840 find_stab_function_addr (namestring
,
1841 pst
? pst
->filename
: NULL
,
1843 /* find_stab_function_addr will return 0 if the minimal
1844 symbol wasn't found. (Unfortunately, this might also
1845 be a valid address.) Anyway, if it *does* return 0,
1846 it is likely that the value was set correctly to begin
1848 if (minsym_valu
!= 0)
1849 nlist
.n_value
= minsym_valu
;
1851 if (pst
&& textlow_not_set
)
1853 pst
->textlow
= nlist
.n_value
;
1854 textlow_not_set
= 0;
1859 /* Keep track of the start of the last function so we
1860 can handle end of function symbols. */
1861 last_function_start
= nlist
.n_value
;
1863 /* In reordered executables this function may lie outside
1864 the bounds created by N_SO symbols. If that's the case
1865 use the address of this function as the low bound for
1866 the partial symbol table. */
1869 || (nlist
.n_value
< pst
->textlow
1871 != ANOFFSET (objfile
->section_offsets
,
1872 SECT_OFF_TEXT (objfile
))))))
1874 pst
->textlow
= nlist
.n_value
;
1875 textlow_not_set
= 0;
1877 add_psymbol_to_list (namestring
, p
- namestring
,
1878 VAR_DOMAIN
, LOC_BLOCK
,
1879 &objfile
->static_psymbols
,
1881 psymtab_language
, objfile
);
1884 /* Global functions were ignored here, but now they
1885 are put into the global psymtab like one would expect.
1886 They're also in the minimal symbol table. */
1890 int name_len
= p
- namestring
;
1891 char *name
= xmalloc (name_len
+ 1);
1892 memcpy (name
, namestring
, name_len
);
1893 name
[name_len
] = '\0';
1894 function_outside_compilation_unit_complaint (name
);
1897 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1898 SECT_OFF_TEXT (objfile
));
1899 /* Kludges for ELF/STABS with Sun ACC */
1900 last_function_name
= namestring
;
1901 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1902 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1903 value for the bottom of the text seg in those cases. */
1904 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1905 SECT_OFF_TEXT (objfile
)))
1907 CORE_ADDR minsym_valu
=
1908 find_stab_function_addr (namestring
,
1909 pst
? pst
->filename
: NULL
,
1911 /* find_stab_function_addr will return 0 if the minimal
1912 symbol wasn't found. (Unfortunately, this might also
1913 be a valid address.) Anyway, if it *does* return 0,
1914 it is likely that the value was set correctly to begin
1916 if (minsym_valu
!= 0)
1917 nlist
.n_value
= minsym_valu
;
1919 if (pst
&& textlow_not_set
)
1921 pst
->textlow
= nlist
.n_value
;
1922 textlow_not_set
= 0;
1927 /* Keep track of the start of the last function so we
1928 can handle end of function symbols. */
1929 last_function_start
= nlist
.n_value
;
1931 /* In reordered executables this function may lie outside
1932 the bounds created by N_SO symbols. If that's the case
1933 use the address of this function as the low bound for
1934 the partial symbol table. */
1937 || (nlist
.n_value
< pst
->textlow
1939 != ANOFFSET (objfile
->section_offsets
,
1940 SECT_OFF_TEXT (objfile
))))))
1942 pst
->textlow
= nlist
.n_value
;
1943 textlow_not_set
= 0;
1945 add_psymbol_to_list (namestring
, p
- namestring
,
1946 VAR_DOMAIN
, LOC_BLOCK
,
1947 &objfile
->global_psymbols
,
1949 psymtab_language
, objfile
);
1952 /* Two things show up here (hopefully); static symbols of
1953 local scope (static used inside braces) or extensions
1954 of structure symbols. We can ignore both. */
1968 case '#': /* for symbol identification (used in live ranges) */
1972 /* It is a C++ nested symbol. We don't need to record it
1973 (I don't think); if we try to look up foo::bar::baz,
1974 then symbols for the symtab containing foo should get
1975 read in, I think. */
1976 /* Someone says sun cc puts out symbols like
1977 /foo/baz/maclib::/usr/local/bin/maclib,
1978 which would get here with a symbol type of ':'. */
1982 /* Unexpected symbol descriptor. The second and subsequent stabs
1983 of a continued stab can show up here. The question is
1984 whether they ever can mimic a normal stab--it would be
1985 nice if not, since we certainly don't want to spend the
1986 time searching to the end of every string looking for
1989 complaint (&symfile_complaints
, _("unknown symbol descriptor `%c'"),
1992 /* Ignore it; perhaps it is an extension that we don't
1999 namestring
= set_namestring (objfile
, nlist
);
2001 /* Find the corresponding bincl and mark that psymtab on the
2002 psymtab dependency list */
2004 struct partial_symtab
*needed_pst
=
2005 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
2007 /* If this include file was defined earlier in this file,
2009 if (needed_pst
== pst
)
2017 for (i
= 0; i
< dependencies_used
; i
++)
2018 if (dependency_list
[i
] == needed_pst
)
2024 /* If it's already in the list, skip the rest. */
2028 dependency_list
[dependencies_used
++] = needed_pst
;
2029 if (dependencies_used
>= dependencies_allocated
)
2031 struct partial_symtab
**orig
= dependency_list
;
2033 (struct partial_symtab
**)
2034 alloca ((dependencies_allocated
*= 2)
2035 * sizeof (struct partial_symtab
*));
2036 memcpy (dependency_list
, orig
,
2038 * sizeof (struct partial_symtab
*)));
2040 fprintf_unfiltered (gdb_stderr
, "Had to reallocate dependency list.\n");
2041 fprintf_unfiltered (gdb_stderr
, "New dependencies allocated: %d\n",
2042 dependencies_allocated
);
2050 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2051 /* Solaris 2 end of module, finish current partial symbol table.
2052 end_psymtab will set pst->texthigh to the proper value, which
2053 is necessary if a module compiled without debugging info
2054 follows this module. */
2057 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2058 symnum
* symbol_size
,
2060 dependency_list
, dependencies_used
, textlow_not_set
);
2061 pst
= (struct partial_symtab
*) 0;
2063 dependencies_used
= 0;
2070 HANDLE_RBRAC (nlist
.n_value
);
2076 case N_SSYM
: /* Claim: Structure or union element.
2077 Hopefully, I can ignore this. */
2078 case N_ENTRY
: /* Alternate entry point; can ignore. */
2079 case N_MAIN
: /* Can definitely ignore this. */
2080 case N_CATCH
: /* These are GNU C++ extensions */
2081 case N_EHDECL
: /* that can safely be ignored here. */
2091 case N_NSYMS
: /* Ultrix 4.0: symbol count */
2092 case N_DEFD
: /* GNU Modula-2 */
2093 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2095 case N_OBJ
: /* useless types from Solaris */
2098 /* These symbols aren't interesting; don't worry about them */
2103 /* If we haven't found it yet, ignore it. It's probably some
2104 new type we don't know about yet. */
2105 unknown_symtype_complaint (hex_string (nlist
.n_type
));
2110 /* If there's stuff to be cleaned up, clean it up. */
2113 /* Don't set pst->texthigh lower than it already is. */
2114 CORE_ADDR text_end
=
2115 (lowest_text_address
== (CORE_ADDR
) -1
2116 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)))
2117 : lowest_text_address
)
2120 end_psymtab (pst
, psymtab_include_list
, includes_used
,
2121 symnum
* symbol_size
,
2122 text_end
> pst
->texthigh
? text_end
: pst
->texthigh
,
2123 dependency_list
, dependencies_used
, textlow_not_set
);
2126 do_cleanups (back_to
);
2129 /* Allocate and partially fill a partial symtab. It will be
2130 completely filled at the end of the symbol list.
2132 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2133 is the address relative to which its symbols are (incremental) or 0
2137 static struct partial_symtab
*
2138 start_psymtab (struct objfile
*objfile
, char *filename
, CORE_ADDR textlow
,
2139 int ldsymoff
, struct partial_symbol
**global_syms
,
2140 struct partial_symbol
**static_syms
)
2142 struct partial_symtab
*result
=
2143 start_psymtab_common (objfile
, objfile
->section_offsets
,
2144 filename
, textlow
, global_syms
, static_syms
);
2146 result
->read_symtab_private
= (char *)
2147 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
2148 LDSYMOFF (result
) = ldsymoff
;
2149 result
->read_symtab
= dbx_psymtab_to_symtab
;
2150 SYMBOL_SIZE (result
) = symbol_size
;
2151 SYMBOL_OFFSET (result
) = symbol_table_offset
;
2152 STRING_OFFSET (result
) = string_table_offset
;
2153 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
2156 /* If we're handling an ELF file, drag some section-relocation info
2157 for this source file out of the ELF symbol table, to compensate for
2158 Sun brain death. This replaces the section_offsets in this psymtab,
2160 elfstab_offset_sections (objfile
, result
);
2163 /* Deduce the source language from the filename for this psymtab. */
2164 psymtab_language
= deduce_language_from_filename (filename
);
2169 /* Close off the current usage of PST.
2170 Returns PST or NULL if the partial symtab was empty and thrown away.
2172 FIXME: List variables and peculiarities of same. */
2174 struct partial_symtab
*
2175 end_psymtab (struct partial_symtab
*pst
, char **include_list
, int num_includes
,
2176 int capping_symbol_offset
, CORE_ADDR capping_text
,
2177 struct partial_symtab
**dependency_list
, int number_dependencies
,
2178 int textlow_not_set
)
2181 struct objfile
*objfile
= pst
->objfile
;
2183 if (capping_symbol_offset
!= -1)
2184 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
2185 pst
->texthigh
= capping_text
;
2187 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2188 /* Under Solaris, the N_SO symbols always have a value of 0,
2189 instead of the usual address of the .o file. Therefore,
2190 we have to do some tricks to fill in texthigh and textlow.
2191 The first trick is: if we see a static
2192 or global function, and the textlow for the current pst
2193 is not set (ie: textlow_not_set), then we use that function's
2194 address for the textlow of the pst. */
2196 /* Now, to fill in texthigh, we remember the last function seen
2197 in the .o file. Also, there's a hack in
2198 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2199 to here via the misc_info field. Therefore, we can fill in
2200 a reliable texthigh by taking the address plus size of the
2201 last function in the file. */
2203 if (pst
->texthigh
== 0 && last_function_name
)
2207 struct minimal_symbol
*minsym
;
2209 p
= strchr (last_function_name
, ':');
2211 p
= last_function_name
;
2212 n
= p
- last_function_name
;
2214 strncpy (p
, last_function_name
, n
);
2217 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2220 /* Sun Fortran appends an underscore to the minimal symbol name,
2221 try again with an appended underscore if the minimal symbol
2225 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2229 pst
->texthigh
= SYMBOL_VALUE_ADDRESS (minsym
) + MSYMBOL_SIZE (minsym
);
2231 last_function_name
= NULL
;
2234 /* this test will be true if the last .o file is only data */
2235 if (textlow_not_set
)
2236 pst
->textlow
= pst
->texthigh
;
2239 struct partial_symtab
*p1
;
2241 /* If we know our own starting text address, then walk through all other
2242 psymtabs for this objfile, and if any didn't know their ending text
2243 address, set it to our starting address. Take care to not set our
2244 own ending address to our starting address, nor to set addresses on
2245 `dependency' files that have both textlow and texthigh zero. */
2247 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2249 if (p1
->texthigh
== 0 && p1
->textlow
!= 0 && p1
!= pst
)
2251 p1
->texthigh
= pst
->textlow
;
2252 /* if this file has only data, then make textlow match texthigh */
2253 if (p1
->textlow
== 0)
2254 p1
->textlow
= p1
->texthigh
;
2259 /* End of kludge for patching Solaris textlow and texthigh. */
2260 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
2262 pst
->n_global_syms
=
2263 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2264 pst
->n_static_syms
=
2265 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2267 pst
->number_of_dependencies
= number_dependencies
;
2268 if (number_dependencies
)
2270 pst
->dependencies
= (struct partial_symtab
**)
2271 obstack_alloc (&objfile
->objfile_obstack
,
2272 number_dependencies
* sizeof (struct partial_symtab
*));
2273 memcpy (pst
->dependencies
, dependency_list
,
2274 number_dependencies
* sizeof (struct partial_symtab
*));
2277 pst
->dependencies
= 0;
2279 for (i
= 0; i
< num_includes
; i
++)
2281 struct partial_symtab
*subpst
=
2282 allocate_psymtab (include_list
[i
], objfile
);
2284 /* Copy the sesction_offsets array from the main psymtab. */
2285 subpst
->section_offsets
= pst
->section_offsets
;
2286 subpst
->read_symtab_private
=
2287 (char *) obstack_alloc (&objfile
->objfile_obstack
,
2288 sizeof (struct symloc
));
2292 subpst
->texthigh
= 0;
2294 /* We could save slight bits of space by only making one of these,
2295 shared by the entire set of include files. FIXME-someday. */
2296 subpst
->dependencies
= (struct partial_symtab
**)
2297 obstack_alloc (&objfile
->objfile_obstack
,
2298 sizeof (struct partial_symtab
*));
2299 subpst
->dependencies
[0] = pst
;
2300 subpst
->number_of_dependencies
= 1;
2302 subpst
->globals_offset
=
2303 subpst
->n_global_syms
=
2304 subpst
->statics_offset
=
2305 subpst
->n_static_syms
= 0;
2309 subpst
->read_symtab
= pst
->read_symtab
;
2312 sort_pst_symbols (pst
);
2314 /* If there is already a psymtab or symtab for a file of this name, remove it.
2315 (If there is a symtab, more drastic things also happen.)
2316 This happens in VxWorks. */
2317 free_named_symtabs (pst
->filename
);
2319 if (num_includes
== 0
2320 && number_dependencies
== 0
2321 && pst
->n_global_syms
== 0
2322 && pst
->n_static_syms
== 0
2323 && has_line_numbers
== 0)
2325 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2326 it is on the obstack, but we can forget to chain it on the list. */
2327 /* Empty psymtabs happen as a result of header files which don't have
2328 any symbols in them. There can be a lot of them. But this check
2329 is wrong, in that a psymtab with N_SLINE entries but nothing else
2330 is not empty, but we don't realize that. Fixing that without slowing
2331 things down might be tricky. */
2333 discard_psymtab (pst
);
2335 /* Indicate that psymtab was thrown away. */
2336 pst
= (struct partial_symtab
*) NULL
;
2342 dbx_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2344 struct cleanup
*old_chain
;
2352 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
2357 /* Read in all partial symtabs on which this one is dependent */
2358 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2359 if (!pst
->dependencies
[i
]->readin
)
2361 /* Inform about additional files that need to be read in. */
2364 fputs_filtered (" ", gdb_stdout
);
2366 fputs_filtered ("and ", gdb_stdout
);
2368 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2369 wrap_here (""); /* Flush output */
2370 gdb_flush (gdb_stdout
);
2372 dbx_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2375 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy */
2377 /* Init stuff necessary for reading in symbols */
2380 old_chain
= make_cleanup (really_free_pendings
, 0);
2381 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2382 symbol_size
= SYMBOL_SIZE (pst
);
2384 /* Read in this file's symbols */
2385 bfd_seek (pst
->objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2386 read_ofile_symtab (pst
);
2388 do_cleanups (old_chain
);
2394 /* Read in all of the symbols for a given psymtab for real.
2395 Be verbose about it if the user wants that. */
2398 dbx_psymtab_to_symtab (struct partial_symtab
*pst
)
2401 struct cleanup
*back_to
= NULL
;
2408 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
2413 if (LDSYMLEN (pst
) || pst
->number_of_dependencies
)
2415 /* Print the message now, before reading the string table,
2416 to avoid disconcerting pauses. */
2419 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
2420 gdb_flush (gdb_stdout
);
2423 sym_bfd
= pst
->objfile
->obfd
;
2425 next_symbol_text_func
= dbx_next_symbol_text
;
2427 if (DBX_STAB_SECTION (pst
->objfile
))
2430 = symfile_relocate_debug_section (pst
->objfile
->obfd
,
2431 DBX_STAB_SECTION (pst
->objfile
),
2434 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
2437 dbx_psymtab_to_symtab_1 (pst
);
2440 do_cleanups (back_to
);
2442 /* Match with global symbols. This only needs to be done once,
2443 after all of the symtabs and dependencies have been read in. */
2444 scan_file_globals (pst
->objfile
);
2446 /* Finish up the debug error message. */
2448 printf_filtered ("done.\n");
2452 /* Read in a defined section of a specific object file's symbols. */
2455 read_ofile_symtab (struct partial_symtab
*pst
)
2458 struct external_nlist
*bufp
;
2459 struct internal_nlist nlist
;
2461 unsigned max_symnum
;
2463 struct objfile
*objfile
;
2464 int sym_offset
; /* Offset to start of symbols to read */
2465 int sym_size
; /* Size of symbols to read */
2466 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2467 int text_size
; /* Size of text segment for symbols */
2468 struct section_offsets
*section_offsets
;
2470 objfile
= pst
->objfile
;
2471 sym_offset
= LDSYMOFF (pst
);
2472 sym_size
= LDSYMLEN (pst
);
2473 text_offset
= pst
->textlow
;
2474 text_size
= pst
->texthigh
- pst
->textlow
;
2475 /* This cannot be simply objfile->section_offsets because of
2476 elfstab_offset_sections() which initializes the psymtab section
2477 offsets information in a special way, and that is different from
2478 objfile->section_offsets. */
2479 section_offsets
= pst
->section_offsets
;
2481 current_objfile
= objfile
;
2482 subfile_stack
= NULL
;
2484 stringtab_global
= DBX_STRINGTAB (objfile
);
2485 last_source_file
= NULL
;
2487 abfd
= objfile
->obfd
;
2488 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol */
2489 symbuf_end
= symbuf_idx
= 0;
2491 symbuf_left
= sym_offset
+ sym_size
;
2493 /* It is necessary to actually read one symbol *before* the start
2494 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2495 occurs before the N_SO symbol.
2497 Detecting this in read_dbx_symtab
2498 would slow down initial readin, so we look for it here instead. */
2499 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2501 stabs_seek (sym_offset
- symbol_size
);
2503 bufp
= &symbuf
[symbuf_idx
++];
2504 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2505 OBJSTAT (objfile
, n_stabs
++);
2507 namestring
= set_namestring (objfile
, nlist
);
2509 processing_gcc_compilation
= 0;
2510 if (nlist
.n_type
== N_TEXT
)
2512 const char *tempstring
= namestring
;
2514 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2515 processing_gcc_compilation
= 1;
2516 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2517 processing_gcc_compilation
= 2;
2518 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2520 if (strncmp (tempstring
, "__gnu_compiled", 14) == 0)
2521 processing_gcc_compilation
= 2;
2524 /* Try to select a C++ demangling based on the compilation unit
2528 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2529 know whether it will use the old style or v3 mangling. */
2530 if (processing_gcc_compilation
)
2532 if (AUTO_DEMANGLING
)
2534 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2541 /* The N_SO starting this symtab is the first symbol, so we
2542 better not check the symbol before it. I'm not this can
2543 happen, but it doesn't hurt to check for it. */
2544 stabs_seek (sym_offset
);
2545 processing_gcc_compilation
= 0;
2548 if (symbuf_idx
== symbuf_end
)
2550 bufp
= &symbuf
[symbuf_idx
];
2551 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2552 error (_("First symbol in segment of executable not a source symbol"));
2554 max_symnum
= sym_size
/ symbol_size
;
2557 symnum
< max_symnum
;
2560 QUIT
; /* Allow this to be interruptable */
2561 if (symbuf_idx
== symbuf_end
)
2563 bufp
= &symbuf
[symbuf_idx
++];
2564 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2565 OBJSTAT (objfile
, n_stabs
++);
2567 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2569 namestring
= set_namestring (objfile
, nlist
);
2573 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2574 namestring
, section_offsets
, objfile
);
2576 /* We skip checking for a new .o or -l file; that should never
2577 happen in this routine. */
2578 else if (type
== N_TEXT
)
2580 /* I don't think this code will ever be executed, because
2581 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2582 the N_SO symbol which starts this source file.
2583 However, there is no reason not to accept
2584 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2586 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2587 processing_gcc_compilation
= 1;
2588 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2589 processing_gcc_compilation
= 2;
2592 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2593 know whether it will use the old style or v3 mangling. */
2594 if (AUTO_DEMANGLING
)
2596 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
2600 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2601 || type
== (unsigned char) N_NBTEXT
2604 /* Global symbol: see if we came across a dbx defintion for
2605 a corresponding symbol. If so, store the value. Remove
2606 syms from the chain when their values are stored, but
2607 search the whole chain, as there may be several syms from
2608 different files with the same name. */
2609 /* This is probably not true. Since the files will be read
2610 in one at a time, each reference to a global symbol will
2611 be satisfied in each file as it appears. So we skip this
2617 /* In a Solaris elf file, this variable, which comes from the
2618 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2619 which comes from pst->textlow is correct. */
2620 if (last_source_start_addr
== 0)
2621 last_source_start_addr
= text_offset
;
2623 /* In reordered executables last_source_start_addr may not be the
2624 lower bound for this symtab, instead use text_offset which comes
2625 from pst->textlow which is correct. */
2626 if (last_source_start_addr
> text_offset
)
2627 last_source_start_addr
= text_offset
;
2629 pst
->symtab
= end_symtab (text_offset
+ text_size
, objfile
, SECT_OFF_TEXT (objfile
));
2633 current_objfile
= NULL
;
2637 /* This handles a single symbol from the symbol-file, building symbols
2638 into a GDB symtab. It takes these arguments and an implicit argument.
2640 TYPE is the type field of the ".stab" symbol entry.
2641 DESC is the desc field of the ".stab" entry.
2642 VALU is the value field of the ".stab" entry.
2643 NAME is the symbol name, in our address space.
2644 SECTION_OFFSETS is a set of amounts by which the sections of this
2645 object file were relocated when it was loaded into memory. Note
2646 that these section_offsets are not the objfile->section_offsets but
2647 the pst->section_offsets. All symbols that refer to memory
2648 locations need to be offset by these amounts.
2649 OBJFILE is the object file from which we are reading symbols. It
2650 is used in end_symtab. */
2653 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, char *name
,
2654 struct section_offsets
*section_offsets
,
2655 struct objfile
*objfile
)
2657 struct context_stack
*new;
2658 /* This remembers the address of the start of a function. It is
2659 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2660 are relative to the current function's start address. On systems
2661 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2662 and is used to relocate these symbol types rather than
2664 static CORE_ADDR function_start_offset
;
2666 /* This holds the address of the start of a function, without the
2667 system peculiarities of function_start_offset. */
2668 static CORE_ADDR last_function_start
;
2670 /* If this is nonzero, we've seen an N_SLINE since the start of the
2671 current function. We use this to tell us to move the first sline
2672 to the beginning of the function regardless of what its given
2674 static int sline_found_in_function
= 1;
2676 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2677 source file. Used to detect the SunPRO solaris compiler. */
2678 static int n_opt_found
;
2680 /* The stab type used for the definition of the last function.
2681 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2682 static int function_stab_type
= 0;
2684 if (!block_address_function_relative
)
2686 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2687 function start address, so just use the text offset. */
2688 function_start_offset
=
2689 ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2692 /* Something is wrong if we see real data before seeing a source
2695 if (last_source_file
== NULL
&& type
!= (unsigned char) N_SO
)
2697 /* Ignore any symbols which appear before an N_SO symbol.
2698 Currently no one puts symbols there, but we should deal
2699 gracefully with the case. A complain()t might be in order,
2700 but this should not be an error (). */
2709 if (*name
== '\000')
2711 /* This N_FUN marks the end of a function. This closes off
2712 the current block. */
2714 if (context_stack_depth
<= 0)
2716 lbrac_mismatch_complaint (symnum
);
2720 /* The following check is added before recording line 0 at
2721 end of function so as to handle hand-generated stabs
2722 which may have an N_FUN stabs at the end of the function,
2723 but no N_SLINE stabs. */
2724 if (sline_found_in_function
)
2725 record_line (current_subfile
, 0, last_function_start
+ valu
);
2727 within_function
= 0;
2728 new = pop_context ();
2730 /* Make a block for the local symbols within. */
2731 finish_block (new->name
, &local_symbols
, new->old_blocks
,
2732 new->start_addr
, new->start_addr
+ valu
,
2735 /* May be switching to an assembler file which may not be using
2736 block relative stabs, so reset the offset. */
2737 if (block_address_function_relative
)
2738 function_start_offset
= 0;
2743 sline_found_in_function
= 0;
2745 /* Relocate for dynamic loading. */
2746 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2747 valu
= gdbarch_smash_text_address (current_gdbarch
, valu
);
2748 last_function_start
= valu
;
2750 goto define_a_symbol
;
2753 /* This "symbol" just indicates the start of an inner lexical
2754 context within a function. */
2756 /* Ignore extra outermost context from SunPRO cc and acc. */
2757 if (n_opt_found
&& desc
== 1)
2760 if (block_address_function_relative
)
2761 /* Relocate for Sun ELF acc fn-relative syms. */
2762 valu
+= function_start_offset
;
2764 /* On most machines, the block addresses are relative to the
2765 N_SO, the linker did not relocate them (sigh). */
2766 valu
+= last_source_start_addr
;
2768 new = push_context (desc
, valu
);
2772 /* This "symbol" just indicates the end of an inner lexical
2773 context that was started with N_LBRAC. */
2775 /* Ignore extra outermost context from SunPRO cc and acc. */
2776 if (n_opt_found
&& desc
== 1)
2779 if (block_address_function_relative
)
2780 /* Relocate for Sun ELF acc fn-relative syms. */
2781 valu
+= function_start_offset
;
2783 /* On most machines, the block addresses are relative to the
2784 N_SO, the linker did not relocate them (sigh). */
2785 valu
+= last_source_start_addr
;
2787 if (context_stack_depth
<= 0)
2789 lbrac_mismatch_complaint (symnum
);
2793 new = pop_context ();
2794 if (desc
!= new->depth
)
2795 lbrac_mismatch_complaint (symnum
);
2797 /* Some compilers put the variable decls inside of an
2798 LBRAC/RBRAC block. This macro should be nonzero if this is
2799 true. DESC is N_DESC from the N_RBRAC symbol. GCC_P is true
2800 if we've detected the GCC_COMPILED_SYMBOL or the
2801 GCC2_COMPILED_SYMBOL. */
2802 #if !defined (VARIABLES_INSIDE_BLOCK)
2803 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2806 /* Can only use new->locals as local symbols here if we're in
2807 GCC or on a machine that puts them before the lbrack. */
2808 if (!VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2810 if (local_symbols
!= NULL
)
2812 /* GCC development snapshots from March to December of
2813 2000 would output N_LSYM entries after N_LBRAC
2814 entries. As a consequence, these symbols are simply
2815 discarded. Complain if this is the case. Note that
2816 there are some compilers which legitimately put local
2817 symbols within an LBRAC/RBRAC block; this complaint
2818 might also help sort out problems in which
2819 VARIABLES_INSIDE_BLOCK is incorrectly defined. */
2820 complaint (&symfile_complaints
, _("\
2821 misplaced N_LBRAC entry; discarding local symbols which have \
2822 no enclosing block"));
2824 local_symbols
= new->locals
;
2827 if (context_stack_depth
2828 > !VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2830 /* This is not the outermost LBRAC...RBRAC pair in the
2831 function, its local symbols preceded it, and are the ones
2832 just recovered from the context stack. Define the block
2833 for them (but don't bother if the block contains no
2834 symbols. Should we complain on blocks without symbols?
2835 I can't think of any useful purpose for them). */
2836 if (local_symbols
!= NULL
)
2838 /* Muzzle a compiler bug that makes end < start.
2840 ??? Which compilers? Is this ever harmful?. */
2841 if (new->start_addr
> valu
)
2843 complaint (&symfile_complaints
,
2844 _("block start larger than block end"));
2845 new->start_addr
= valu
;
2847 /* Make a block for the local symbols within. */
2848 finish_block (0, &local_symbols
, new->old_blocks
,
2849 new->start_addr
, valu
, objfile
);
2854 /* This is the outermost LBRAC...RBRAC pair. There is no
2855 need to do anything; leave the symbols that preceded it
2856 to be attached to the function's own block. We need to
2857 indicate that we just moved outside of the function. */
2858 within_function
= 0;
2861 if (VARIABLES_INSIDE_BLOCK (desc
, processing_gcc_compilation
))
2862 /* Now pop locals of block just finished. */
2863 local_symbols
= new->locals
;
2868 /* This kind of symbol indicates the start of an object file.
2869 Relocate for dynamic loading. */
2870 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2874 /* This type of symbol indicates the start of data for one
2875 source file. Finish the symbol table of the previous source
2876 file (if any) and start accumulating a new symbol table.
2877 Relocate for dynamic loading. */
2878 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2882 if (last_source_file
)
2884 /* Check if previous symbol was also an N_SO (with some
2885 sanity checks). If so, that one was actually the
2886 directory name, and the current one is the real file
2887 name. Patch things up. */
2888 if (previous_stab_code
== (unsigned char) N_SO
)
2890 patch_subfile_names (current_subfile
, name
);
2891 break; /* Ignore repeated SOs */
2893 end_symtab (valu
, objfile
, SECT_OFF_TEXT (objfile
));
2897 /* Null name means this just marks the end of text for this .o
2898 file. Don't start a new symtab in this case. */
2899 if (*name
== '\000')
2902 if (block_address_function_relative
)
2903 function_start_offset
= 0;
2906 start_symtab (name
, NULL
, valu
);
2907 record_debugformat ("stabs");
2911 /* This type of symbol indicates the start of data for a
2912 sub-source-file, one whose contents were copied or included
2913 in the compilation of the main source file (whose name was
2914 given in the N_SO symbol). Relocate for dynamic loading. */
2915 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2916 start_subfile (name
, current_subfile
->dirname
);
2921 add_new_header_file (name
, valu
);
2922 start_subfile (name
, current_subfile
->dirname
);
2926 start_subfile (pop_subfile (), current_subfile
->dirname
);
2930 add_old_header_file (name
, valu
);
2934 /* This type of "symbol" really just records one line-number --
2935 core-address correspondence. Enter it in the line list for
2936 this symbol table. */
2938 /* Relocate for dynamic loading and for ELF acc
2939 function-relative symbols. */
2940 valu
+= function_start_offset
;
2942 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
2943 middle of the prologue instead of right at the start of the
2944 function. To deal with this we record the address for the
2945 first N_SLINE stab to be the start of the function instead of
2946 the listed location. We really shouldn't to this. When
2947 compiling with optimization, this first N_SLINE stab might be
2948 optimized away. Other (non-GCC) compilers don't emit this
2949 stab at all. There is no real harm in having an extra
2950 numbered line, although it can be a bit annoying for the
2951 user. However, it totally screws up our testsuite.
2953 So for now, keep adjusting the address of the first N_SLINE
2954 stab, but only for code compiled with GCC. */
2956 if (within_function
&& sline_found_in_function
== 0)
2958 if (processing_gcc_compilation
== 2)
2959 record_line (current_subfile
, desc
, last_function_start
);
2961 record_line (current_subfile
, desc
, valu
);
2962 sline_found_in_function
= 1;
2965 record_line (current_subfile
, desc
, valu
);
2969 common_block_start (name
, objfile
);
2973 common_block_end (objfile
);
2976 /* The following symbol types need to have the appropriate
2977 offset added to their value; then we process symbol
2978 definitions in the name. */
2980 case N_STSYM
: /* Static symbol in data segment. */
2981 case N_LCSYM
: /* Static symbol in BSS segment. */
2982 case N_ROSYM
: /* Static symbol in read-only data segment. */
2983 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2984 Solaris 2's stabs-in-elf makes *most* symbols relative but
2985 leaves a few absolute (at least for Solaris 2.1 and version
2986 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
2987 the fence. .stab "foo:S...",N_STSYM is absolute (ld
2988 relocates it) .stab "foo:V...",N_STSYM is relative (section
2989 base subtracted). This leaves us no choice but to search for
2990 the 'S' or 'V'... (or pass the whole section_offsets stuff
2991 down ONE MORE function call level, which we really don't want
2996 /* Normal object file and NLMs have non-zero text seg offsets,
2997 but don't need their static syms offset in this fashion.
2998 XXX - This is really a crock that should be fixed in the
2999 solib handling code so that I don't have to work around it
3002 if (!symfile_relocatable
)
3004 p
= strchr (name
, ':');
3005 if (p
!= 0 && p
[1] == 'S')
3007 /* The linker relocated it. We don't want to add an
3008 elfstab_offset_sections-type offset, but we *do*
3009 want to add whatever solib.c passed to
3010 symbol_file_add as addr (this is known to affect
3011 SunOS 4, and I suspect ELF too). Since
3012 elfstab_offset_sections currently does not muck
3013 with the text offset (there is no Ttext.text
3014 symbol), we can get addr from the text offset. If
3015 elfstab_offset_sections ever starts dealing with
3016 the text offset, and we still need to do this, we
3017 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3018 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3019 goto define_a_symbol
;
3022 /* Since it's not the kludge case, re-dispatch to the right
3033 internal_error (__FILE__
, __LINE__
,
3034 _("failed internal consistency check"));
3038 case_N_STSYM
: /* Static symbol in data segment. */
3039 case N_DSLINE
: /* Source line number, data segment. */
3040 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
3041 goto define_a_symbol
;
3043 case_N_LCSYM
: /* Static symbol in BSS segment. */
3044 case N_BSLINE
: /* Source line number, BSS segment. */
3045 /* N_BROWS: overlaps with N_BSLINE. */
3046 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
3047 goto define_a_symbol
;
3049 case_N_ROSYM
: /* Static symbol in read-only data segment. */
3050 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
3051 goto define_a_symbol
;
3053 case N_ENTRY
: /* Alternate entry point. */
3054 /* Relocate for dynamic loading. */
3055 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
3056 goto define_a_symbol
;
3058 /* The following symbol types we don't know how to process.
3059 Handle them in a "default" way, but complain to people who
3062 case N_CATCH
: /* Exception handler catcher. */
3063 case N_EHDECL
: /* Exception handler name. */
3064 case N_PC
: /* Global symbol in Pascal. */
3065 case N_M2C
: /* Modula-2 compilation unit. */
3066 /* N_MOD2: overlaps with N_EHDECL. */
3067 case N_SCOPE
: /* Modula-2 scope information. */
3068 case N_ECOML
: /* End common (local name). */
3069 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
3074 unknown_symtype_complaint (hex_string (type
));
3077 /* The following symbol types don't need the address field
3078 relocated, since it is either unused, or is absolute. */
3080 case N_GSYM
: /* Global variable. */
3081 case N_NSYMS
: /* Number of symbols (Ultrix). */
3082 case N_NOMAP
: /* No map? (Ultrix). */
3083 case N_RSYM
: /* Register variable. */
3084 case N_DEFD
: /* Modula-2 GNU module dependency. */
3085 case N_SSYM
: /* Struct or union element. */
3086 case N_LSYM
: /* Local symbol in stack. */
3087 case N_PSYM
: /* Parameter variable. */
3088 case N_LENG
: /* Length of preceding symbol type. */
3092 char *colon_pos
= strchr (name
, ':');
3093 if (colon_pos
== NULL
)
3096 deftype
= colon_pos
[1];
3102 function_stab_type
= type
;
3104 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
3105 /* Deal with the SunPRO 3.0 compiler which omits the
3106 address from N_FUN symbols. */
3108 && valu
== ANOFFSET (section_offsets
,
3109 SECT_OFF_TEXT (objfile
)))
3111 CORE_ADDR minsym_valu
=
3112 find_stab_function_addr (name
, last_source_file
, objfile
);
3114 /* The function find_stab_function_addr will return
3115 0 if the minimal symbol wasn't found.
3116 (Unfortunately, this might also be a valid
3117 address.) Anyway, if it *does* return 0, it is
3118 likely that the value was set correctly to begin
3120 if (minsym_valu
!= 0)
3125 if (block_address_function_relative
)
3126 /* For Solaris 2 compilers, the block addresses and
3127 N_SLINE's are relative to the start of the
3128 function. On normal systems, and when using GCC on
3129 Solaris 2, these addresses are just absolute, or
3130 relative to the N_SO, depending on
3131 BLOCK_ADDRESS_ABSOLUTE. */
3132 function_start_offset
= valu
;
3134 within_function
= 1;
3136 if (context_stack_depth
> 1)
3138 complaint (&symfile_complaints
,
3139 _("unmatched N_LBRAC before symtab pos %d"), symnum
);
3143 if (context_stack_depth
> 0)
3145 new = pop_context ();
3146 /* Make a block for the local symbols within. */
3147 finish_block (new->name
, &local_symbols
, new->old_blocks
,
3148 new->start_addr
, valu
, objfile
);
3151 new = push_context (0, valu
);
3152 new->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
3156 define_symbol (valu
, name
, desc
, type
, objfile
);
3162 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3163 for a bunch of other flags, too. Someday we may parse their
3164 flags; for now we ignore theirs and hope they'll ignore ours. */
3165 case N_OPT
: /* Solaris 2: Compiler options. */
3168 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
3170 processing_gcc_compilation
= 2;
3171 #if 0 /* Works, but is experimental. -fnf */
3172 /* For now, stay with AUTO_DEMANGLING for g++ output, as
3173 we don't know whether it will use the old style or v3
3175 if (AUTO_DEMANGLING
)
3177 set_demangling_style (GNU_DEMANGLING_STYLE_STRING
);
3186 case N_MAIN
: /* Name of main routine. */
3187 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3188 it with a symbol file with "main" and without N_MAIN. I'm
3189 not sure exactly what rule to follow but probably something
3190 like: N_MAIN takes precedence over "main" no matter what
3191 objfile it is in; If there is more than one N_MAIN, choose
3192 the one in the symfile_objfile; If there is more than one
3193 N_MAIN within a given objfile, complain() and choose
3194 arbitrarily. (kingdon) */
3196 set_main_name (name
);
3199 /* The following symbol types can be ignored. */
3200 case N_OBJ
: /* Solaris 2: Object file dir and name. */
3201 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
3202 /* N_UNDF: Solaris 2: File separator mark. */
3203 /* N_UNDF: -- we will never encounter it, since we only process
3204 one file's symbols at once. */
3205 case N_ENDM
: /* Solaris 2: End of module. */
3206 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
3210 /* '#' is a GNU C extension to allow one symbol to refer to another
3213 Generally this is used so that an alias can refer to its main
3217 /* Initialize symbol reference names and determine if this is a
3218 definition. If a symbol reference is being defined, go ahead
3219 and add it. Otherwise, just return. */
3224 /* If this stab defines a new reference ID that is not on the
3225 reference list, then put it on the reference list.
3227 We go ahead and advance NAME past the reference, even though
3228 it is not strictly necessary at this time. */
3229 refnum
= symbol_reference_defined (&s
);
3231 if (!ref_search (refnum
))
3232 ref_add (refnum
, 0, name
, valu
);
3236 previous_stab_code
= type
;
3239 /* FIXME: The only difference between this and elfstab_build_psymtabs
3240 is the call to install_minimal_symbols for elf, and the support for
3241 split sections. If the differences are really that small, the code
3242 should be shared. */
3244 /* Scan and build partial symbols for an coff symbol file.
3245 The coff file has already been processed to get its minimal symbols.
3247 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3250 OBJFILE is the object file we are reading symbols from.
3251 ADDR is the address relative to which the symbols are (e.g.
3252 the base address of the text segment).
3253 MAINLINE is true if we are reading the main symbol
3254 table (as opposed to a shared lib or dynamically loaded file).
3255 TEXTADDR is the address of the text section.
3256 TEXTSIZE is the size of the text section.
3257 STABSECTS is the list of .stab sections in OBJFILE.
3258 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3259 .stabstr section exists.
3261 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3262 adjusted for coff details. */
3265 coffstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3266 CORE_ADDR textaddr
, unsigned int textsize
,
3267 struct stab_section_list
*stabsects
,
3268 file_ptr stabstroffset
, unsigned int stabstrsize
)
3271 bfd
*sym_bfd
= objfile
->obfd
;
3272 char *name
= bfd_get_filename (sym_bfd
);
3273 struct dbx_symfile_info
*info
;
3274 unsigned int stabsize
;
3276 /* There is already a dbx_symfile_info allocated by our caller.
3277 It might even contain some info from the coff symtab to help us. */
3278 info
= objfile
->deprecated_sym_stab_info
;
3280 DBX_TEXT_ADDR (objfile
) = textaddr
;
3281 DBX_TEXT_SIZE (objfile
) = textsize
;
3283 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3284 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3285 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3287 if (stabstrsize
> bfd_get_size (sym_bfd
))
3288 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3289 DBX_STRINGTAB (objfile
) = (char *)
3290 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3291 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3293 /* Now read in the string table in one big gulp. */
3295 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3297 perror_with_name (name
);
3298 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3299 if (val
!= stabstrsize
)
3300 perror_with_name (name
);
3302 stabsread_new_init ();
3303 buildsym_new_init ();
3304 free_header_files ();
3305 init_header_files ();
3307 processing_acc_compilation
= 1;
3309 /* In a coff file, we've already installed the minimal symbols that came
3310 from the coff (non-stab) symbol table, so always act like an
3311 incremental load here. */
3312 if (stabsects
->next
== NULL
)
3314 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3315 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3316 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3320 struct stab_section_list
*stabsect
;
3322 DBX_SYMCOUNT (objfile
) = 0;
3323 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3325 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3326 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3329 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3331 symbuf_sections
= stabsects
->next
;
3332 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3336 dbx_symfile_read (objfile
, 0);
3339 /* Scan and build partial symbols for an ELF symbol file.
3340 This ELF file has already been processed to get its minimal symbols.
3342 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3345 OBJFILE is the object file we are reading symbols from.
3346 ADDR is the address relative to which the symbols are (e.g.
3347 the base address of the text segment).
3348 MAINLINE is true if we are reading the main symbol
3349 table (as opposed to a shared lib or dynamically loaded file).
3350 STABSECT is the BFD section information for the .stab section.
3351 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3352 .stabstr section exists.
3354 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3355 adjusted for elf details. */
3358 elfstab_build_psymtabs (struct objfile
*objfile
, int mainline
,
3360 file_ptr stabstroffset
, unsigned int stabstrsize
)
3363 bfd
*sym_bfd
= objfile
->obfd
;
3364 char *name
= bfd_get_filename (sym_bfd
);
3365 struct dbx_symfile_info
*info
;
3366 struct cleanup
*back_to
= NULL
;
3368 /* There is already a dbx_symfile_info allocated by our caller.
3369 It might even contain some info from the ELF symtab to help us. */
3370 info
= objfile
->deprecated_sym_stab_info
;
3372 /* Find the first and last text address. dbx_symfile_read seems to
3374 find_text_range (sym_bfd
, objfile
);
3376 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3377 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3378 DBX_SYMCOUNT (objfile
)
3379 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3380 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3381 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3382 DBX_STAB_SECTION (objfile
) = stabsect
;
3384 if (stabstrsize
> bfd_get_size (sym_bfd
))
3385 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3386 DBX_STRINGTAB (objfile
) = (char *)
3387 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3388 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3390 /* Now read in the string table in one big gulp. */
3392 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3394 perror_with_name (name
);
3395 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3396 if (val
!= stabstrsize
)
3397 perror_with_name (name
);
3399 stabsread_new_init ();
3400 buildsym_new_init ();
3401 free_header_files ();
3402 init_header_files ();
3404 processing_acc_compilation
= 1;
3407 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3408 stabs_data
= symfile_relocate_debug_section (objfile
->obfd
, stabsect
, NULL
);
3410 back_to
= make_cleanup (free_current_contents
, (void *) &stabs_data
);
3412 /* In an elf file, we've already installed the minimal symbols that came
3413 from the elf (non-stab) symbol table, so always act like an
3414 incremental load here. dbx_symfile_read should not generate any new
3415 minimal symbols, since we will have already read the ELF dynamic symbol
3416 table and normal symbol entries won't be in the ".stab" section; but in
3417 case it does, it will install them itself. */
3418 dbx_symfile_read (objfile
, 0);
3421 do_cleanups (back_to
);
3424 /* Scan and build partial symbols for a file with special sections for stabs
3425 and stabstrings. The file has already been processed to get its minimal
3426 symbols, and any other symbols that might be necessary to resolve GSYMs.
3428 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3431 OBJFILE is the object file we are reading symbols from.
3432 ADDR is the address relative to which the symbols are (e.g. the base address
3433 of the text segment).
3434 MAINLINE is true if we are reading the main symbol table (as opposed to a
3435 shared lib or dynamically loaded file).
3436 STAB_NAME is the name of the section that contains the stabs.
3437 STABSTR_NAME is the name of the section that contains the stab strings.
3439 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3442 stabsect_build_psymtabs (struct objfile
*objfile
, int mainline
, char *stab_name
,
3443 char *stabstr_name
, char *text_name
)
3446 bfd
*sym_bfd
= objfile
->obfd
;
3447 char *name
= bfd_get_filename (sym_bfd
);
3449 asection
*stabstrsect
;
3450 asection
*text_sect
;
3452 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3453 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3459 error (_("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)"),
3460 stab_name
, stabstr_name
);
3462 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
3463 xmalloc (sizeof (struct dbx_symfile_info
));
3464 memset (objfile
->deprecated_sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
3466 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3468 error (_("Can't find %s section in symbol file"), text_name
);
3469 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3470 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3472 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3473 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3474 / DBX_SYMBOL_SIZE (objfile
);
3475 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3476 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3478 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3479 error (_("ridiculous string table size: %d bytes"), DBX_STRINGTAB_SIZE (objfile
));
3480 DBX_STRINGTAB (objfile
) = (char *)
3481 obstack_alloc (&objfile
->objfile_obstack
, DBX_STRINGTAB_SIZE (objfile
) + 1);
3482 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3484 /* Now read in the string table in one big gulp. */
3486 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3487 stabstrsect
, /* bfd section */
3488 DBX_STRINGTAB (objfile
), /* input buffer */
3489 0, /* offset into section */
3490 DBX_STRINGTAB_SIZE (objfile
)); /* amount to read */
3493 perror_with_name (name
);
3495 stabsread_new_init ();
3496 buildsym_new_init ();
3497 free_header_files ();
3498 init_header_files ();
3500 /* Now, do an incremental load */
3502 processing_acc_compilation
= 1;
3503 dbx_symfile_read (objfile
, 0);
3506 static struct sym_fns aout_sym_fns
=
3508 bfd_target_aout_flavour
,
3509 dbx_new_init
, /* sym_new_init: init anything gbl to entire symtab */
3510 dbx_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
3511 dbx_symfile_read
, /* sym_read: read a symbol file into symtab */
3512 dbx_symfile_finish
, /* sym_finish: finished with file, cleanup */
3513 default_symfile_offsets
, /* sym_offsets: parse user's offsets to internal form */
3514 default_symfile_segments
, /* sym_segments: Get segment information from
3516 NULL
, /* sym_read_linetable */
3517 NULL
/* next: pointer to next struct sym_fns */
3521 _initialize_dbxread (void)
3523 add_symtab_fns (&aout_sym_fns
);