1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2018 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* This module provides three functions: dbx_symfile_init,
20 which initializes to read a symbol file; dbx_new_init, which
21 discards existing cached information when all symbols are being
22 discarded; and dbx_symfile_read, which reads a symbol table
25 dbx_symfile_read only does the minimum work necessary for letting the
26 user "name" things symbolically; it does not read the entire symtab.
27 Instead, it reads the external and static symbols and puts them in partial
28 symbol tables. When more extensive information is requested of a
29 file, the corresponding partial symbol table is mutated into a full
30 fledged symbol table by going back and reading the symbols
31 for real. dbx_psymtab_to_symtab() is the function that does this */
34 #if defined(__CYGNUSCLIB__)
35 #include <sys/types.h>
39 #include "gdb_obstack.h"
42 #include "breakpoint.h"
44 #include "gdbcore.h" /* for bfd stuff */
45 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
46 #include "filenames.h"
48 #include "buildsym-legacy.h"
49 #include "stabsread.h"
50 #include "gdb-stabs.h"
52 #include "complaints.h"
54 #include "cp-support.h"
57 #include "aout/aout64.h"
58 #include "aout/stab_gnu.h" /* We always use GNU stabs, not
62 /* Key for dbx-associated data. */
64 const struct objfile_data
*dbx_objfile_data_key
;
66 /* We put a pointer to this structure in the read_symtab_private field
71 /* Offset within the file symbol table of first local symbol for this
76 /* Length (in bytes) of the section of the symbol table devoted to
77 this file's symbols (actually, the section bracketed may contain
78 more than just this file's symbols). If ldsymlen is 0, the only
79 reason for this thing's existence is the dependency list. Nothing
80 else will happen when it is read in. */
84 /* The size of each symbol in the symbol file (in external form). */
88 /* Further information needed to locate the symbols if they are in
93 int file_string_offset
;
94 enum language pst_language
;
97 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
98 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
99 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
100 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
101 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
102 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
103 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
104 #define PST_LANGUAGE(p) (SYMLOC(p)->pst_language)
107 /* The objfile we are currently reading. */
109 static struct objfile
*dbxread_objfile
;
111 /* Remember what we deduced to be the source language of this psymtab. */
113 static enum language psymtab_language
= language_unknown
;
115 /* The BFD for this file -- implicit parameter to next_symbol_text. */
117 static bfd
*symfile_bfd
;
119 /* The size of each symbol in the symbol file (in external form).
120 This is set by dbx_symfile_read when building psymtabs, and by
121 dbx_psymtab_to_symtab when building symtabs. */
123 static unsigned symbol_size
;
125 /* This is the offset of the symbol table in the executable file. */
127 static unsigned symbol_table_offset
;
129 /* This is the offset of the string table in the executable file. */
131 static unsigned string_table_offset
;
133 /* For elf+stab executables, the n_strx field is not a simple index
134 into the string table. Instead, each .o file has a base offset in
135 the string table, and the associated symbols contain offsets from
136 this base. The following two variables contain the base offset for
137 the current and next .o files. */
139 static unsigned int file_string_table_offset
;
140 static unsigned int next_file_string_table_offset
;
142 /* .o and NLM files contain unrelocated addresses which are based at
143 0. When non-zero, this flag disables some of the special cases for
144 Solaris elf+stab text addresses at location 0. */
146 static int symfile_relocatable
= 0;
148 /* When set, we are processing a .o file compiled by sun acc. This is
149 misnamed; it refers to all stabs-in-elf implementations which use
150 N_UNDF the way Sun does, including Solaris gcc. Hopefully all
151 stabs-in-elf implementations ever invented will choose to be
154 static unsigned char processing_acc_compilation
;
157 /* The lowest text address we have yet encountered. This is needed
158 because in an a.out file, there is no header field which tells us
159 what address the program is actually going to be loaded at, so we
160 need to make guesses based on the symbols (which *are* relocated to
161 reflect the address it will be loaded at). */
163 static CORE_ADDR lowest_text_address
;
165 /* Non-zero if there is any line number info in the objfile. Prevents
166 dbx_end_psymtab from discarding an otherwise empty psymtab. */
168 static int has_line_numbers
;
170 /* Complaints about the symbols we have encountered. */
173 unknown_symtype_complaint (const char *arg1
)
175 complaint (_("unknown symbol type %s"), arg1
);
179 lbrac_mismatch_complaint (int arg1
)
181 complaint (_("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1
);
185 repeated_header_complaint (const char *arg1
, int arg2
)
187 complaint (_("\"repeated\" header file %s not "
188 "previously seen, at symtab pos %d"),
192 /* find_text_range --- find start and end of loadable code sections
194 The find_text_range function finds the shortest address range that
195 encloses all sections containing executable code, and stores it in
196 objfile's text_addr and text_size members.
198 dbx_symfile_read will use this to finish off the partial symbol
199 table, in some cases. */
202 find_text_range (bfd
* sym_bfd
, struct objfile
*objfile
)
209 for (sec
= sym_bfd
->sections
; sec
; sec
= sec
->next
)
210 if (bfd_get_section_flags (sym_bfd
, sec
) & SEC_CODE
)
212 CORE_ADDR sec_start
= bfd_section_vma (sym_bfd
, sec
);
213 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (sym_bfd
, sec
);
217 if (sec_start
< start
)
232 error (_("Can't find any code sections in symbol file"));
234 DBX_TEXT_ADDR (objfile
) = start
;
235 DBX_TEXT_SIZE (objfile
) = end
- start
;
240 /* During initial symbol readin, we need to have a structure to keep
241 track of which psymtabs have which bincls in them. This structure
242 is used during readin to setup the list of dependencies within each
243 partial symbol table. */
245 struct header_file_location
247 header_file_location (const char *name_
, int instance_
,
248 struct partial_symtab
*pst_
)
250 instance (instance_
),
255 const char *name
; /* Name of header file */
256 int instance
; /* See above */
257 struct partial_symtab
*pst
; /* Partial symtab that has the
258 BINCL/EINCL defs for this file. */
261 /* The list of bincls. */
262 static std::vector
<struct header_file_location
> *bincl_list
;
264 /* Local function prototypes. */
266 static void read_ofile_symtab (struct objfile
*, struct partial_symtab
*);
268 static void dbx_read_symtab (struct partial_symtab
*self
,
269 struct objfile
*objfile
);
271 static void dbx_psymtab_to_symtab_1 (struct objfile
*, struct partial_symtab
*);
273 static void read_dbx_symtab (minimal_symbol_reader
&, struct objfile
*);
275 static struct partial_symtab
*find_corresponding_bincl_psymtab (const char *,
278 static const char *dbx_next_symbol_text (struct objfile
*);
280 static void fill_symbuf (bfd
*);
282 static void dbx_symfile_init (struct objfile
*);
284 static void dbx_new_init (struct objfile
*);
286 static void dbx_symfile_read (struct objfile
*, symfile_add_flags
);
288 static void dbx_symfile_finish (struct objfile
*);
290 static void record_minimal_symbol (minimal_symbol_reader
&,
291 const char *, CORE_ADDR
, int,
294 static void add_new_header_file (const char *, int);
296 static void add_old_header_file (const char *, int);
298 static void add_this_object_header_file (int);
300 static struct partial_symtab
*start_psymtab (struct objfile
*, const char *,
302 std::vector
<partial_symbol
*> &,
303 std::vector
<partial_symbol
*> &);
305 /* Free up old header file tables. */
308 free_header_files (void)
310 if (this_object_header_files
)
312 xfree (this_object_header_files
);
313 this_object_header_files
= NULL
;
315 n_allocated_this_object_header_files
= 0;
318 /* Allocate new header file tables. */
321 init_header_files (void)
323 n_allocated_this_object_header_files
= 10;
324 this_object_header_files
= XNEWVEC (int, 10);
327 /* Add header file number I for this object file
328 at the next successive FILENUM. */
331 add_this_object_header_file (int i
)
333 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
335 n_allocated_this_object_header_files
*= 2;
336 this_object_header_files
337 = (int *) xrealloc ((char *) this_object_header_files
,
338 n_allocated_this_object_header_files
* sizeof (int));
341 this_object_header_files
[n_this_object_header_files
++] = i
;
344 /* Add to this file an "old" header file, one already seen in
345 a previous object file. NAME is the header file's name.
346 INSTANCE is its instance code, to select among multiple
347 symbol tables for the same header file. */
350 add_old_header_file (const char *name
, int instance
)
352 struct header_file
*p
= HEADER_FILES (dbxread_objfile
);
355 for (i
= 0; i
< N_HEADER_FILES (dbxread_objfile
); i
++)
356 if (filename_cmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
358 add_this_object_header_file (i
);
361 repeated_header_complaint (name
, symnum
);
364 /* Add to this file a "new" header file: definitions for its types follow.
365 NAME is the header file's name.
366 Most often this happens only once for each distinct header file,
367 but not necessarily. If it happens more than once, INSTANCE has
368 a different value each time, and references to the header file
369 use INSTANCE values to select among them.
371 dbx output contains "begin" and "end" markers for each new header file,
372 but at this level we just need to know which files there have been;
373 so we record the file when its "begin" is seen and ignore the "end". */
376 add_new_header_file (const char *name
, int instance
)
379 struct header_file
*hfile
;
381 /* Make sure there is room for one more header file. */
383 i
= N_ALLOCATED_HEADER_FILES (dbxread_objfile
);
385 if (N_HEADER_FILES (dbxread_objfile
) == i
)
389 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = 10;
390 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
391 xmalloc (10 * sizeof (struct header_file
));
396 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = i
;
397 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
398 xrealloc ((char *) HEADER_FILES (dbxread_objfile
),
399 (i
* sizeof (struct header_file
)));
403 /* Create an entry for this header file. */
405 i
= N_HEADER_FILES (dbxread_objfile
)++;
406 hfile
= HEADER_FILES (dbxread_objfile
) + i
;
407 hfile
->name
= xstrdup (name
);
408 hfile
->instance
= instance
;
410 hfile
->vector
= XCNEWVEC (struct type
*, 10);
412 add_this_object_header_file (i
);
416 static struct type
**
417 explicit_lookup_type (int real_filenum
, int index
)
419 struct header_file
*f
= &HEADER_FILES (dbxread_objfile
)[real_filenum
];
421 if (index
>= f
->length
)
424 f
->vector
= (struct type
**)
425 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
426 memset (&f
->vector
[f
->length
/ 2],
427 '\0', f
->length
* sizeof (struct type
*) / 2);
429 return &f
->vector
[index
];
434 record_minimal_symbol (minimal_symbol_reader
&reader
,
435 const char *name
, CORE_ADDR address
, int type
,
436 struct objfile
*objfile
)
438 enum minimal_symbol_type ms_type
;
445 section
= SECT_OFF_TEXT (objfile
);
449 section
= SECT_OFF_DATA (objfile
);
453 section
= SECT_OFF_BSS (objfile
);
462 section
= SECT_OFF_DATA (objfile
);
465 /* I don't think this type actually exists; since a N_SETV is the result
466 of going over many .o files, it doesn't make sense to have one
468 ms_type
= mst_file_data
;
469 section
= SECT_OFF_DATA (objfile
);
476 ms_type
= mst_file_text
;
477 section
= SECT_OFF_TEXT (objfile
);
480 ms_type
= mst_file_data
;
482 /* Check for __DYNAMIC, which is used by Sun shared libraries.
483 Record it as global even if it's local, not global, so
484 lookup_minimal_symbol can find it. We don't check symbol_leading_char
485 because for SunOS4 it always is '_'. */
486 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
489 /* Same with virtual function tables, both global and static. */
491 const char *tempstring
= name
;
493 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
495 if (is_vtable_name (tempstring
))
498 section
= SECT_OFF_DATA (objfile
);
501 ms_type
= mst_file_bss
;
502 section
= SECT_OFF_BSS (objfile
);
505 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 reader
.record_with_info (name
, address
, ms_type
, section
);
517 /* Scan and build partial symbols for a symbol file.
518 We have been initialized by a call to dbx_symfile_init, which
519 put all the relevant info into a "struct dbx_symfile_info",
520 hung off the objfile structure. */
523 dbx_symfile_read (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
528 sym_bfd
= objfile
->obfd
;
530 /* .o and .nlm files are relocatables with text, data and bss segs based at
531 0. This flag disables special (Solaris stabs-in-elf only) fixups for
532 symbols with a value of 0. */
534 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
536 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
538 perror_with_name (objfile_name (objfile
));
540 /* Size the symbol table. */
541 if (objfile
->global_psymbols
.capacity () == 0
542 && objfile
->static_psymbols
.capacity () == 0)
543 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
545 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
546 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
548 scoped_free_pendings free_pending
;
550 minimal_symbol_reader
reader (objfile
);
552 /* Read stabs data from executable file and define symbols. */
554 read_dbx_symtab (reader
, objfile
);
556 /* Install any minimal symbols that have been collected as the current
557 minimal symbols for this objfile. */
562 /* Initialize anything that needs initializing when a completely new
563 symbol file is specified (not just adding some symbols from another
564 file, e.g. a shared library). */
567 dbx_new_init (struct objfile
*ignore
)
569 stabsread_new_init ();
570 init_header_files ();
574 /* dbx_symfile_init ()
575 is the dbx-specific initialization routine for reading symbols.
576 It is passed a struct objfile which contains, among other things,
577 the BFD for the file whose symbols are being read, and a slot for a pointer
578 to "private data" which we fill with goodies.
580 We read the string table into malloc'd space and stash a pointer to it.
582 Since BFD doesn't know how to read debug symbols in a format-independent
583 way (and may never do so...), we have to do it ourselves. We will never
584 be called unless this is an a.out (or very similar) file.
585 FIXME, there should be a cleaner peephole into the BFD environment here. */
587 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
590 dbx_symfile_init (struct objfile
*objfile
)
593 bfd
*sym_bfd
= objfile
->obfd
;
594 char *name
= bfd_get_filename (sym_bfd
);
596 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
597 struct dbx_symfile_info
*dbx
;
599 /* Allocate struct to keep track of the symfile. */
600 dbx
= XCNEW (struct dbx_symfile_info
);
601 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
603 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
604 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
605 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
607 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
608 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
609 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
611 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
613 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
615 error (_("Can't find .text section in symbol file"));
616 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
617 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
619 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
620 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
621 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
623 /* Read the string table and stash it away in the objfile_obstack.
624 When we blow away the objfile the string table goes away as well.
625 Note that gdb used to use the results of attempting to malloc the
626 string table, based on the size it read, as a form of sanity check
627 for botched byte swapping, on the theory that a byte swapped string
628 table size would be so totally bogus that the malloc would fail. Now
629 that we put in on the objfile_obstack, we can't do this since gdb gets
630 a fatal error (out of virtual memory) if the size is bogus. We can
631 however at least check to see if the size is less than the size of
632 the size field itself, or larger than the size of the entire file.
633 Note that all valid string tables have a size greater than zero, since
634 the bytes used to hold the size are included in the count. */
636 if (STRING_TABLE_OFFSET
== 0)
638 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
639 will never be zero, even when there is no string table. This
640 would appear to be a bug in bfd. */
641 DBX_STRINGTAB_SIZE (objfile
) = 0;
642 DBX_STRINGTAB (objfile
) = NULL
;
646 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
648 perror_with_name (name
);
650 memset (size_temp
, 0, sizeof (size_temp
));
651 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
654 perror_with_name (name
);
658 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
659 EOF if there is no string table, and attempting to read the size
660 from EOF will read zero bytes. */
661 DBX_STRINGTAB_SIZE (objfile
) = 0;
662 DBX_STRINGTAB (objfile
) = NULL
;
666 /* Read some data that would appear to be the string table size.
667 If there really is a string table, then it is probably the right
668 size. Byteswap if necessary and validate the size. Note that
669 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
670 random data that happened to be at STRING_TABLE_OFFSET, because
671 bfd can't tell us there is no string table, the sanity checks may
672 or may not catch this. */
673 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
675 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
676 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
677 error (_("ridiculous string table size (%d bytes)."),
678 DBX_STRINGTAB_SIZE (objfile
));
680 DBX_STRINGTAB (objfile
) =
681 (char *) obstack_alloc (&objfile
->objfile_obstack
,
682 DBX_STRINGTAB_SIZE (objfile
));
683 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
685 /* Now read in the string table in one big gulp. */
687 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
689 perror_with_name (name
);
690 val
= bfd_bread (DBX_STRINGTAB (objfile
),
691 DBX_STRINGTAB_SIZE (objfile
),
693 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
694 perror_with_name (name
);
699 /* Perform any local cleanups required when we are done with a particular
700 objfile. I.E, we are in the process of discarding all symbol information
701 for an objfile, freeing up all memory held for it, and unlinking the
702 objfile struct from the global list of known objfiles. */
705 dbx_symfile_finish (struct objfile
*objfile
)
707 free_header_files ();
711 dbx_free_symfile_info (struct objfile
*objfile
, void *arg
)
713 struct dbx_symfile_info
*dbx
= (struct dbx_symfile_info
*) arg
;
715 if (dbx
->header_files
!= NULL
)
717 int i
= dbx
->n_header_files
;
718 struct header_file
*hfiles
= dbx
->header_files
;
722 xfree (hfiles
[i
].name
);
723 xfree (hfiles
[i
].vector
);
733 /* Buffer for reading the symbol table entries. */
734 static struct external_nlist symbuf
[4096];
735 static int symbuf_idx
;
736 static int symbuf_end
;
738 /* Name of last function encountered. Used in Solaris to approximate
739 object file boundaries. */
740 static const char *last_function_name
;
742 /* The address in memory of the string table of the object file we are
743 reading (which might not be the "main" object file, but might be a
744 shared library or some other dynamically loaded thing). This is
745 set by read_dbx_symtab when building psymtabs, and by
746 read_ofile_symtab when building symtabs, and is used only by
747 next_symbol_text. FIXME: If that is true, we don't need it when
748 building psymtabs, right? */
749 static char *stringtab_global
;
751 /* These variables are used to control fill_symbuf when the stabs
752 symbols are not contiguous (as may be the case when a COFF file is
753 linked using --split-by-reloc). */
754 static struct stab_section_list
*symbuf_sections
;
755 static unsigned int symbuf_left
;
756 static unsigned int symbuf_read
;
758 /* This variable stores a global stabs buffer, if we read stabs into
759 memory in one chunk in order to process relocations. */
760 static bfd_byte
*stabs_data
;
762 /* Refill the symbol table input buffer
763 and set the variables that control fetching entries from it.
764 Reports an error if no data available.
765 This function can read past the end of the symbol table
766 (into the string table) but this does no harm. */
769 fill_symbuf (bfd
*sym_bfd
)
776 nbytes
= sizeof (symbuf
);
777 if (nbytes
> symbuf_left
)
778 nbytes
= symbuf_left
;
779 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
781 else if (symbuf_sections
== NULL
)
783 count
= sizeof (symbuf
);
784 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
788 if (symbuf_left
<= 0)
790 file_ptr filepos
= symbuf_sections
->section
->filepos
;
792 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
793 perror_with_name (bfd_get_filename (sym_bfd
));
794 symbuf_left
= bfd_section_size (sym_bfd
, symbuf_sections
->section
);
795 symbol_table_offset
= filepos
- symbuf_read
;
796 symbuf_sections
= symbuf_sections
->next
;
800 if (count
> sizeof (symbuf
))
801 count
= sizeof (symbuf
);
802 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
806 perror_with_name (bfd_get_filename (sym_bfd
));
807 else if (nbytes
== 0)
808 error (_("Premature end of file reading symbol table"));
809 symbuf_end
= nbytes
/ symbol_size
;
811 symbuf_left
-= nbytes
;
812 symbuf_read
+= nbytes
;
816 stabs_seek (int sym_offset
)
820 symbuf_read
+= sym_offset
;
821 symbuf_left
-= sym_offset
;
824 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
827 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
829 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
830 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
831 (intern).n_other = 0; \
832 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
833 if (bfd_get_sign_extend_vma (abfd)) \
834 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
836 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
839 /* Invariant: The symbol pointed to by symbuf_idx is the first one
840 that hasn't been swapped. Swap the symbol at the same time
841 that symbuf_idx is incremented. */
843 /* dbx allows the text of a symbol name to be continued into the
844 next symbol name! When such a continuation is encountered
845 (a \ at the end of the text of a name)
846 call this function to get the continuation. */
849 dbx_next_symbol_text (struct objfile
*objfile
)
851 struct internal_nlist nlist
;
853 if (symbuf_idx
== symbuf_end
)
854 fill_symbuf (symfile_bfd
);
857 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
858 OBJSTAT (objfile
, n_stabs
++);
862 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
866 /* Given a name, value pair, find the corresponding
867 bincl in the list. Return the partial symtab associated
868 with that header_file_location. */
870 static struct partial_symtab
*
871 find_corresponding_bincl_psymtab (const char *name
, int instance
)
873 for (const header_file_location
&bincl
: *bincl_list
)
874 if (bincl
.instance
== instance
875 && strcmp (name
, bincl
.name
) == 0)
878 repeated_header_complaint (name
, symnum
);
879 return (struct partial_symtab
*) 0;
882 /* Set namestring based on nlist. If the string table index is invalid,
883 give a fake name, and print a single error message per symbol file read,
884 rather than abort the symbol reading or flood the user with messages. */
887 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
889 const char *namestring
;
891 if (nlist
->n_strx
+ file_string_table_offset
892 >= DBX_STRINGTAB_SIZE (objfile
)
893 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
895 complaint (_("bad string table offset in symbol %d"),
897 namestring
= "<bad string table offset>";
900 namestring
= (nlist
->n_strx
+ file_string_table_offset
901 + DBX_STRINGTAB (objfile
));
906 find_stab_function_addr (const char *namestring
, const char *filename
,
907 struct objfile
*objfile
)
909 struct bound_minimal_symbol msym
;
912 const char *colon
= strchr (namestring
, ':');
916 n
= colon
- namestring
;
918 char *p
= (char *) alloca (n
+ 2);
919 strncpy (p
, namestring
, n
);
922 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
923 if (msym
.minsym
== NULL
)
925 /* Sun Fortran appends an underscore to the minimal symbol name,
926 try again with an appended underscore if the minimal symbol
930 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
933 if (msym
.minsym
== NULL
&& filename
!= NULL
)
935 /* Try again without the filename. */
937 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
939 if (msym
.minsym
== NULL
&& filename
!= NULL
)
941 /* And try again for Sun Fortran, but without the filename. */
944 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
947 return msym
.minsym
== NULL
? 0 : BMSYMBOL_VALUE_ADDRESS (msym
);
951 function_outside_compilation_unit_complaint (const char *arg1
)
953 complaint (_("function `%s' appears to be defined "
954 "outside of all compilation units"),
958 /* Setup partial_symtab's describing each source file for which
959 debugging information is available. */
962 read_dbx_symtab (minimal_symbol_reader
&reader
, struct objfile
*objfile
)
964 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
965 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
966 struct internal_nlist nlist
;
969 const char *sym_name
;
972 const char *namestring
;
974 int past_first_source_file
= 0;
975 CORE_ADDR last_function_start
= 0;
980 /* Current partial symtab. */
981 struct partial_symtab
*pst
;
983 /* List of current psymtab's include files. */
984 const char **psymtab_include_list
;
985 int includes_allocated
;
988 /* Index within current psymtab dependency list. */
989 struct partial_symtab
**dependency_list
;
990 int dependencies_used
, dependencies_allocated
;
992 text_addr
= DBX_TEXT_ADDR (objfile
);
993 text_size
= DBX_TEXT_SIZE (objfile
);
995 /* FIXME. We probably want to change stringtab_global rather than add this
996 while processing every symbol entry. FIXME. */
997 file_string_table_offset
= 0;
998 next_file_string_table_offset
= 0;
1000 stringtab_global
= DBX_STRINGTAB (objfile
);
1002 pst
= (struct partial_symtab
*) 0;
1004 includes_allocated
= 30;
1006 psymtab_include_list
= (const char **) alloca (includes_allocated
*
1007 sizeof (const char *));
1009 dependencies_allocated
= 30;
1010 dependencies_used
= 0;
1012 (struct partial_symtab
**) alloca (dependencies_allocated
*
1013 sizeof (struct partial_symtab
*));
1015 /* Init bincl list */
1016 std::vector
<struct header_file_location
> bincl_storage
;
1017 scoped_restore restore_bincl_global
1018 = make_scoped_restore (&bincl_list
, &bincl_storage
);
1020 set_last_source_file (NULL
);
1022 lowest_text_address
= (CORE_ADDR
) -1;
1024 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1025 abfd
= objfile
->obfd
;
1026 symbuf_end
= symbuf_idx
= 0;
1027 next_symbol_text_func
= dbx_next_symbol_text
;
1028 textlow_not_set
= 1;
1029 has_line_numbers
= 0;
1031 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1032 to global and static variables. The stab for a global or static
1033 variable doesn't give us any indication of which section it's in,
1034 so we can't tell immediately which offset in
1035 objfile->section_offsets we should apply to the variable's
1038 We could certainly find out which section contains the variable
1039 by looking up the variable's unrelocated address with
1040 find_pc_section, but that would be expensive; this is the
1041 function that constructs the partial symbol tables by examining
1042 every symbol in the entire executable, and it's
1043 performance-critical. So that expense would not be welcome. I'm
1044 not sure what to do about this at the moment.
1046 What we have done for years is to simply assume that the .data
1047 section's offset is appropriate for all global and static
1048 variables. Recently, this was expanded to fall back to the .bss
1049 section's offset if there is no .data section, and then to the
1050 .rodata section's offset. */
1051 data_sect_index
= objfile
->sect_index_data
;
1052 if (data_sect_index
== -1)
1053 data_sect_index
= SECT_OFF_BSS (objfile
);
1054 if (data_sect_index
== -1)
1055 data_sect_index
= SECT_OFF_RODATA (objfile
);
1057 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1058 for the file to have no .data, no .bss, and no .text at all, if
1059 it also has no global or static variables. If it does, we will
1060 get an internal error from an ANOFFSET macro below when we try to
1061 use data_sect_index. */
1063 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1065 /* Get the symbol for this run and pull out some info. */
1066 QUIT
; /* Allow this to be interruptable. */
1067 if (symbuf_idx
== symbuf_end
)
1069 bufp
= &symbuf
[symbuf_idx
++];
1072 * Special case to speed up readin.
1074 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1076 has_line_numbers
= 1;
1080 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1081 OBJSTAT (objfile
, n_stabs
++);
1083 /* Ok. There is a lot of code duplicated in the rest of this
1084 switch statement (for efficiency reasons). Since I don't
1085 like duplicating code, I will do my penance here, and
1086 describe the code which is duplicated:
1088 *) The assignment to namestring.
1089 *) The call to strchr.
1090 *) The addition of a partial symbol the two partial
1091 symbol lists. This last is a large section of code, so
1092 I've imbedded it in the following macro. */
1094 switch (nlist
.n_type
)
1097 * Standard, external, non-debugger, symbols
1100 case N_TEXT
| N_EXT
:
1101 case N_NBTEXT
| N_EXT
:
1104 case N_DATA
| N_EXT
:
1105 case N_NBDATA
| N_EXT
:
1110 case N_NBBSS
| N_EXT
:
1111 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1116 namestring
= set_namestring (objfile
, &nlist
);
1118 record_minimal_symbol (reader
, namestring
, nlist
.n_value
,
1119 nlist
.n_type
, objfile
); /* Always */
1122 /* Standard, local, non-debugger, symbols. */
1126 /* We need to be able to deal with both N_FN or N_TEXT,
1127 because we have no way of knowing whether the sys-supplied ld
1128 or GNU ld was used to make the executable. Sequents throw
1129 in another wrinkle -- they renumbered N_FN. */
1134 namestring
= set_namestring (objfile
, &nlist
);
1136 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1137 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1138 && namestring
[nsl
- 2] == '.'))
1140 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1141 SECT_OFF_TEXT (objfile
));
1143 if (past_first_source_file
&& pst
1144 /* The gould NP1 uses low values for .o and -l symbols
1145 which are not the address. */
1146 && nlist
.n_value
>= pst
->text_low ())
1148 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
,
1149 includes_used
, symnum
* symbol_size
,
1150 nlist
.n_value
> pst
->text_high ()
1151 ? nlist
.n_value
: pst
->text_high (),
1152 dependency_list
, dependencies_used
,
1154 pst
= (struct partial_symtab
*) 0;
1156 dependencies_used
= 0;
1157 has_line_numbers
= 0;
1160 past_first_source_file
= 1;
1169 case N_UNDF
| N_EXT
:
1170 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1171 We used to rely on the target to tell us whether it knows
1172 where the symbol has been relocated to, but none of the
1173 target implementations actually provided that operation.
1174 So we just ignore the symbol, the same way we would do if
1175 we had a target-side symbol lookup which returned no match.
1177 All other symbols (with nlist.n_value == 0), are really
1178 undefined, and so we ignore them too. */
1182 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1184 /* Deal with relative offsets in the string table
1185 used in ELF+STAB under Solaris. If we want to use the
1186 n_strx field, which contains the name of the file,
1187 we must adjust file_string_table_offset *before* calling
1188 set_namestring(). */
1189 past_first_source_file
= 1;
1190 file_string_table_offset
= next_file_string_table_offset
;
1191 next_file_string_table_offset
=
1192 file_string_table_offset
+ nlist
.n_value
;
1193 if (next_file_string_table_offset
< file_string_table_offset
)
1194 error (_("string table offset backs up at %d"), symnum
);
1195 /* FIXME -- replace error() with complaint. */
1200 /* Lots of symbol types we can just ignore. */
1207 /* Keep going . . . */
1210 * Special symbol types for GNU
1213 case N_INDR
| N_EXT
:
1215 case N_SETA
| N_EXT
:
1217 case N_SETT
| N_EXT
:
1219 case N_SETD
| N_EXT
:
1221 case N_SETB
| N_EXT
:
1232 static int prev_so_symnum
= -10;
1233 static int first_so_symnum
;
1235 static const char *dirname_nso
;
1236 int prev_textlow_not_set
;
1238 valu
= nlist
.n_value
+ ANOFFSET (objfile
->section_offsets
,
1239 SECT_OFF_TEXT (objfile
));
1241 prev_textlow_not_set
= textlow_not_set
;
1243 /* A zero value is probably an indication for the SunPRO 3.0
1244 compiler. dbx_end_psymtab explicitly tests for zero, so
1245 don't relocate it. */
1247 if (nlist
.n_value
== 0
1248 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1250 textlow_not_set
= 1;
1254 textlow_not_set
= 0;
1256 past_first_source_file
= 1;
1258 if (prev_so_symnum
!= symnum
- 1)
1259 { /* Here if prev stab wasn't N_SO. */
1260 first_so_symnum
= symnum
;
1264 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
,
1265 includes_used
, symnum
* symbol_size
,
1266 (valu
> pst
->text_high ()
1267 ? valu
: pst
->text_high ()),
1268 dependency_list
, dependencies_used
,
1269 prev_textlow_not_set
);
1270 pst
= (struct partial_symtab
*) 0;
1272 dependencies_used
= 0;
1273 has_line_numbers
= 0;
1277 prev_so_symnum
= symnum
;
1279 /* End the current partial symtab and start a new one. */
1281 namestring
= set_namestring (objfile
, &nlist
);
1283 /* Null name means end of .o file. Don't start a new one. */
1284 if (*namestring
== '\000')
1287 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1288 The first one is a directory name; the second the file name.
1289 If pst exists, is empty, and has a filename ending in '/',
1290 we assume the previous N_SO was a directory name. */
1292 p
= lbasename (namestring
);
1293 if (p
!= namestring
&& *p
== '\000')
1295 /* Save the directory name SOs locally, then save it into
1296 the psymtab when it's created below. */
1297 dirname_nso
= namestring
;
1301 /* Some other compilers (C++ ones in particular) emit useless
1302 SOs for non-existant .c files. We ignore all subsequent SOs
1303 that immediately follow the first. */
1307 pst
= start_psymtab (objfile
,
1309 first_so_symnum
* symbol_size
,
1310 objfile
->global_psymbols
,
1311 objfile
->static_psymbols
);
1312 pst
->dirname
= dirname_nso
;
1320 enum language tmp_language
;
1322 /* Add this bincl to the bincl_list for future EXCLs. No
1323 need to save the string; it'll be around until
1324 read_dbx_symtab function returns. */
1326 namestring
= set_namestring (objfile
, &nlist
);
1327 tmp_language
= deduce_language_from_filename (namestring
);
1329 /* Only change the psymtab's language if we've learned
1330 something useful (eg. tmp_language is not language_unknown).
1331 In addition, to match what start_subfile does, never change
1333 if (tmp_language
!= language_unknown
1334 && (tmp_language
!= language_c
1335 || psymtab_language
!= language_cplus
))
1336 psymtab_language
= tmp_language
;
1340 /* FIXME: we should not get here without a PST to work on.
1341 Attempt to recover. */
1342 complaint (_("N_BINCL %s not in entries for "
1343 "any file, at symtab pos %d"),
1344 namestring
, symnum
);
1347 bincl_list
->emplace_back (namestring
, nlist
.n_value
, pst
);
1349 /* Mark down an include file in the current psymtab. */
1351 goto record_include_file
;
1356 enum language tmp_language
;
1358 /* Mark down an include file in the current psymtab. */
1359 namestring
= set_namestring (objfile
, &nlist
);
1360 tmp_language
= deduce_language_from_filename (namestring
);
1362 /* Only change the psymtab's language if we've learned
1363 something useful (eg. tmp_language is not language_unknown).
1364 In addition, to match what start_subfile does, never change
1366 if (tmp_language
!= language_unknown
1367 && (tmp_language
!= language_c
1368 || psymtab_language
!= language_cplus
))
1369 psymtab_language
= tmp_language
;
1371 /* In C++, one may expect the same filename to come round many
1372 times, when code is coming alternately from the main file
1373 and from inline functions in other files. So I check to see
1374 if this is a file we've seen before -- either the main
1375 source file, or a previously included file.
1377 This seems to be a lot of time to be spending on N_SOL, but
1378 things like "break c-exp.y:435" need to work (I
1379 suppose the psymtab_include_list could be hashed or put
1380 in a binary tree, if profiling shows this is a major hog). */
1381 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
1386 for (i
= 0; i
< includes_used
; i
++)
1387 if (filename_cmp (namestring
, psymtab_include_list
[i
]) == 0)
1396 record_include_file
:
1398 psymtab_include_list
[includes_used
++] = namestring
;
1399 if (includes_used
>= includes_allocated
)
1401 const char **orig
= psymtab_include_list
;
1403 psymtab_include_list
= (const char **)
1404 alloca ((includes_allocated
*= 2) * sizeof (const char *));
1405 memcpy (psymtab_include_list
, orig
,
1406 includes_used
* sizeof (const char *));
1410 case N_LSYM
: /* Typedef or automatic variable. */
1411 case N_STSYM
: /* Data seg var -- static. */
1412 case N_LCSYM
: /* BSS " */
1413 case N_ROSYM
: /* Read-only data seg var -- static. */
1414 case N_NBSTS
: /* Gould nobase. */
1415 case N_NBLCS
: /* symbols. */
1417 case N_GSYM
: /* Global (extern) variable; can be
1418 data or bss (sigh FIXME). */
1420 /* Following may probably be ignored; I'll leave them here
1421 for now (until I do Pascal and Modula 2 extensions). */
1423 case N_PC
: /* I may or may not need this; I
1425 case N_M2C
: /* I suspect that I can ignore this here. */
1426 case N_SCOPE
: /* Same. */
1430 namestring
= set_namestring (objfile
, &nlist
);
1432 /* See if this is an end of function stab. */
1433 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1437 /* It's value is the size (in bytes) of the function for
1438 function relative stabs, or the address of the function's
1439 end for old style stabs. */
1440 valu
= nlist
.n_value
+ last_function_start
;
1441 if (pst
->text_high () == 0 || valu
> pst
->text_high ())
1442 pst
->set_text_high (valu
);
1446 p
= (char *) strchr (namestring
, ':');
1448 continue; /* Not a debugging symbol. */
1451 sym_name
= NULL
; /* pacify "gcc -Werror" */
1452 if (psymtab_language
== language_cplus
)
1454 std::string
name (namestring
, p
- namestring
);
1455 std::string new_name
= cp_canonicalize_string (name
.c_str ());
1456 if (!new_name
.empty ())
1458 sym_len
= new_name
.length ();
1459 sym_name
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
1467 sym_name
= namestring
;
1468 sym_len
= p
- namestring
;
1471 /* Main processing section for debugging symbols which
1472 the initial read through the symbol tables needs to worry
1473 about. If we reach this point, the symbol which we are
1474 considering is definitely one we are interested in.
1475 p must also contain the (valid) index into the namestring
1476 which indicates the debugging type symbol. */
1481 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1484 if (gdbarch_static_transform_name_p (gdbarch
))
1485 gdbarch_static_transform_name (gdbarch
, namestring
);
1487 add_psymbol_to_list (sym_name
, sym_len
, 1,
1488 VAR_DOMAIN
, LOC_STATIC
,
1489 &objfile
->static_psymbols
,
1490 nlist
.n_value
, psymtab_language
, objfile
);
1494 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1496 /* The addresses in these entries are reported to be
1497 wrong. See the code that reads 'G's for symtabs. */
1498 add_psymbol_to_list (sym_name
, sym_len
, 1,
1499 VAR_DOMAIN
, LOC_STATIC
,
1500 &objfile
->global_psymbols
,
1501 nlist
.n_value
, psymtab_language
, objfile
);
1505 /* When a 'T' entry is defining an anonymous enum, it
1506 may have a name which is the empty string, or a
1507 single space. Since they're not really defining a
1508 symbol, those shouldn't go in the partial symbol
1509 table. We do pick up the elements of such enums at
1510 'check_enum:', below. */
1511 if (p
>= namestring
+ 2
1512 || (p
== namestring
+ 1
1513 && namestring
[0] != ' '))
1515 add_psymbol_to_list (sym_name
, sym_len
, 1,
1516 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1517 &objfile
->static_psymbols
,
1518 0, psymtab_language
, objfile
);
1521 /* Also a typedef with the same name. */
1522 add_psymbol_to_list (sym_name
, sym_len
, 1,
1523 VAR_DOMAIN
, LOC_TYPEDEF
,
1524 &objfile
->static_psymbols
,
1525 0, psymtab_language
, objfile
);
1532 if (p
!= namestring
) /* a name is there, not just :T... */
1534 add_psymbol_to_list (sym_name
, sym_len
, 1,
1535 VAR_DOMAIN
, LOC_TYPEDEF
,
1536 &objfile
->static_psymbols
,
1537 0, psymtab_language
, objfile
);
1540 /* If this is an enumerated type, we need to
1541 add all the enum constants to the partial symbol
1542 table. This does not cover enums without names, e.g.
1543 "enum {a, b} c;" in C, but fortunately those are
1544 rare. There is no way for GDB to find those from the
1545 enum type without spending too much time on it. Thus
1546 to solve this problem, the compiler needs to put out the
1547 enum in a nameless type. GCC2 does this. */
1549 /* We are looking for something of the form
1550 <name> ":" ("t" | "T") [<number> "="] "e"
1551 {<constant> ":" <value> ","} ";". */
1553 /* Skip over the colon and the 't' or 'T'. */
1555 /* This type may be given a number. Also, numbers can come
1556 in pairs like (0,26). Skip over it. */
1557 while ((*p
>= '0' && *p
<= '9')
1558 || *p
== '(' || *p
== ',' || *p
== ')'
1564 /* The aix4 compiler emits extra crud before the members. */
1567 /* Skip over the type (?). */
1571 /* Skip over the colon. */
1575 /* We have found an enumerated type. */
1576 /* According to comments in read_enum_type
1577 a comma could end it instead of a semicolon.
1578 I don't know where that happens.
1580 while (*p
&& *p
!= ';' && *p
!= ',')
1584 /* Check for and handle cretinous dbx symbol name
1586 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1587 p
= next_symbol_text (objfile
);
1589 /* Point to the character after the name
1590 of the enum constant. */
1591 for (q
= p
; *q
&& *q
!= ':'; q
++)
1593 /* Note that the value doesn't matter for
1594 enum constants in psymtabs, just in symtabs. */
1595 add_psymbol_to_list (p
, q
- p
, 1,
1596 VAR_DOMAIN
, LOC_CONST
,
1597 &objfile
->static_psymbols
, 0,
1598 psymtab_language
, objfile
);
1599 /* Point past the name. */
1601 /* Skip over the value. */
1602 while (*p
&& *p
!= ',')
1604 /* Advance past the comma. */
1612 /* Constant, e.g. from "const" in Pascal. */
1613 add_psymbol_to_list (sym_name
, sym_len
, 1,
1614 VAR_DOMAIN
, LOC_CONST
,
1615 &objfile
->static_psymbols
, 0,
1616 psymtab_language
, objfile
);
1622 int name_len
= p
- namestring
;
1623 char *name
= (char *) xmalloc (name_len
+ 1);
1625 memcpy (name
, namestring
, name_len
);
1626 name
[name_len
] = '\0';
1627 function_outside_compilation_unit_complaint (name
);
1630 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1631 SECT_OFF_TEXT (objfile
));
1632 /* Kludges for ELF/STABS with Sun ACC. */
1633 last_function_name
= namestring
;
1634 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1635 value for the bottom of the text seg in those cases. */
1636 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1637 SECT_OFF_TEXT (objfile
))
1638 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1640 CORE_ADDR minsym_valu
=
1641 find_stab_function_addr (namestring
,
1642 pst
? pst
->filename
: NULL
,
1645 /* find_stab_function_addr will return 0 if the minimal
1646 symbol wasn't found. (Unfortunately, this might also
1647 be a valid address.) Anyway, if it *does* return 0,
1648 it is likely that the value was set correctly to begin
1650 if (minsym_valu
!= 0)
1651 nlist
.n_value
= minsym_valu
;
1653 if (pst
&& textlow_not_set
1654 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1656 pst
->set_text_low (nlist
.n_value
);
1657 textlow_not_set
= 0;
1661 /* Keep track of the start of the last function so we
1662 can handle end of function symbols. */
1663 last_function_start
= nlist
.n_value
;
1665 /* In reordered executables this function may lie outside
1666 the bounds created by N_SO symbols. If that's the case
1667 use the address of this function as the low bound for
1668 the partial symbol table. */
1671 || (nlist
.n_value
< pst
->text_low ()
1673 != ANOFFSET (objfile
->section_offsets
,
1674 SECT_OFF_TEXT (objfile
))))))
1676 pst
->set_text_low (nlist
.n_value
);
1677 textlow_not_set
= 0;
1679 add_psymbol_to_list (sym_name
, sym_len
, 1,
1680 VAR_DOMAIN
, LOC_BLOCK
,
1681 &objfile
->static_psymbols
,
1682 nlist
.n_value
, psymtab_language
, objfile
);
1685 /* Global functions were ignored here, but now they
1686 are put into the global psymtab like one would expect.
1687 They're also in the minimal symbol table. */
1691 int name_len
= p
- namestring
;
1692 char *name
= (char *) xmalloc (name_len
+ 1);
1694 memcpy (name
, namestring
, name_len
);
1695 name
[name_len
] = '\0';
1696 function_outside_compilation_unit_complaint (name
);
1699 nlist
.n_value
+= ANOFFSET (objfile
->section_offsets
,
1700 SECT_OFF_TEXT (objfile
));
1701 /* Kludges for ELF/STABS with Sun ACC. */
1702 last_function_name
= namestring
;
1703 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1704 value for the bottom of the text seg in those cases. */
1705 if (nlist
.n_value
== ANOFFSET (objfile
->section_offsets
,
1706 SECT_OFF_TEXT (objfile
))
1707 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1709 CORE_ADDR minsym_valu
=
1710 find_stab_function_addr (namestring
,
1711 pst
? pst
->filename
: NULL
,
1714 /* find_stab_function_addr will return 0 if the minimal
1715 symbol wasn't found. (Unfortunately, this might also
1716 be a valid address.) Anyway, if it *does* return 0,
1717 it is likely that the value was set correctly to begin
1719 if (minsym_valu
!= 0)
1720 nlist
.n_value
= minsym_valu
;
1722 if (pst
&& textlow_not_set
1723 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1725 pst
->set_text_low (nlist
.n_value
);
1726 textlow_not_set
= 0;
1730 /* Keep track of the start of the last function so we
1731 can handle end of function symbols. */
1732 last_function_start
= nlist
.n_value
;
1734 /* In reordered executables this function may lie outside
1735 the bounds created by N_SO symbols. If that's the case
1736 use the address of this function as the low bound for
1737 the partial symbol table. */
1740 || (nlist
.n_value
< pst
->text_low ()
1742 != ANOFFSET (objfile
->section_offsets
,
1743 SECT_OFF_TEXT (objfile
))))))
1745 pst
->set_text_low (nlist
.n_value
);
1746 textlow_not_set
= 0;
1748 add_psymbol_to_list (sym_name
, sym_len
, 1,
1749 VAR_DOMAIN
, LOC_BLOCK
,
1750 &objfile
->global_psymbols
,
1751 nlist
.n_value
, psymtab_language
, objfile
);
1754 /* Two things show up here (hopefully); static symbols of
1755 local scope (static used inside braces) or extensions
1756 of structure symbols. We can ignore both. */
1770 case '#': /* For symbol identification (used in live ranges). */
1774 /* It is a C++ nested symbol. We don't need to record it
1775 (I don't think); if we try to look up foo::bar::baz,
1776 then symbols for the symtab containing foo should get
1777 read in, I think. */
1778 /* Someone says sun cc puts out symbols like
1779 /foo/baz/maclib::/usr/local/bin/maclib,
1780 which would get here with a symbol type of ':'. */
1784 /* Unexpected symbol descriptor. The second and subsequent stabs
1785 of a continued stab can show up here. The question is
1786 whether they ever can mimic a normal stab--it would be
1787 nice if not, since we certainly don't want to spend the
1788 time searching to the end of every string looking for
1791 complaint (_("unknown symbol descriptor `%c'"),
1794 /* Ignore it; perhaps it is an extension that we don't
1802 namestring
= set_namestring (objfile
, &nlist
);
1804 /* Find the corresponding bincl and mark that psymtab on the
1805 psymtab dependency list. */
1807 struct partial_symtab
*needed_pst
=
1808 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
1810 /* If this include file was defined earlier in this file,
1812 if (needed_pst
== pst
)
1820 for (i
= 0; i
< dependencies_used
; i
++)
1821 if (dependency_list
[i
] == needed_pst
)
1827 /* If it's already in the list, skip the rest. */
1831 dependency_list
[dependencies_used
++] = needed_pst
;
1832 if (dependencies_used
>= dependencies_allocated
)
1834 struct partial_symtab
**orig
= dependency_list
;
1837 (struct partial_symtab
**)
1838 alloca ((dependencies_allocated
*= 2)
1839 * sizeof (struct partial_symtab
*));
1840 memcpy (dependency_list
, orig
,
1842 * sizeof (struct partial_symtab
*)));
1844 fprintf_unfiltered (gdb_stderr
,
1845 "Had to reallocate "
1846 "dependency list.\n");
1847 fprintf_unfiltered (gdb_stderr
,
1848 "New dependencies allocated: %d\n",
1849 dependencies_allocated
);
1857 /* Solaris 2 end of module, finish current partial symbol
1858 table. dbx_end_psymtab will set the high text address of
1859 PST to the proper value, which is necessary if a module
1860 compiled without debugging info follows this module. */
1861 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
1863 dbx_end_psymtab (objfile
, pst
,
1864 psymtab_include_list
, includes_used
,
1865 symnum
* symbol_size
,
1866 (CORE_ADDR
) 0, dependency_list
,
1867 dependencies_used
, textlow_not_set
);
1868 pst
= (struct partial_symtab
*) 0;
1870 dependencies_used
= 0;
1871 has_line_numbers
= 0;
1877 HANDLE_RBRAC (nlist
.n_value
);
1883 case N_SSYM
: /* Claim: Structure or union element.
1884 Hopefully, I can ignore this. */
1885 case N_ENTRY
: /* Alternate entry point; can ignore. */
1886 case N_MAIN
: /* Can definitely ignore this. */
1887 case N_CATCH
: /* These are GNU C++ extensions */
1888 case N_EHDECL
: /* that can safely be ignored here. */
1900 case N_NSYMS
: /* Ultrix 4.0: symbol count */
1901 case N_DEFD
: /* GNU Modula-2 */
1902 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
1904 case N_OBJ
: /* Useless types from Solaris. */
1907 /* These symbols aren't interesting; don't worry about them. */
1911 /* If we haven't found it yet, ignore it. It's probably some
1912 new type we don't know about yet. */
1913 unknown_symtype_complaint (hex_string (nlist
.n_type
));
1918 /* If there's stuff to be cleaned up, clean it up. */
1921 /* Don't set high text address of PST lower than it already
1923 CORE_ADDR text_end
=
1924 (lowest_text_address
== (CORE_ADDR
) -1
1925 ? (text_addr
+ ANOFFSET (objfile
->section_offsets
,
1926 SECT_OFF_TEXT (objfile
)))
1927 : lowest_text_address
)
1930 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
1931 symnum
* symbol_size
,
1932 (text_end
> pst
->text_high ()
1933 ? text_end
: pst
->text_high ()),
1934 dependency_list
, dependencies_used
, textlow_not_set
);
1938 /* Allocate and partially fill a partial symtab. It will be
1939 completely filled at the end of the symbol list.
1941 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1942 is the address relative to which its symbols are (incremental) or 0
1945 static struct partial_symtab
*
1946 start_psymtab (struct objfile
*objfile
, const char *filename
, CORE_ADDR textlow
,
1947 int ldsymoff
, std::vector
<partial_symbol
*> &global_psymbols
,
1948 std::vector
<partial_symbol
*> &static_psymbols
)
1950 struct partial_symtab
*result
=
1951 start_psymtab_common (objfile
, filename
, textlow
,
1952 global_psymbols
, static_psymbols
);
1954 result
->read_symtab_private
=
1955 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
1956 LDSYMOFF (result
) = ldsymoff
;
1957 result
->read_symtab
= dbx_read_symtab
;
1958 SYMBOL_SIZE (result
) = symbol_size
;
1959 SYMBOL_OFFSET (result
) = symbol_table_offset
;
1960 STRING_OFFSET (result
) = string_table_offset
;
1961 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
1963 /* Deduce the source language from the filename for this psymtab. */
1964 psymtab_language
= deduce_language_from_filename (filename
);
1965 PST_LANGUAGE (result
) = psymtab_language
;
1970 /* Close off the current usage of PST.
1971 Returns PST or NULL if the partial symtab was empty and thrown away.
1973 FIXME: List variables and peculiarities of same. */
1975 struct partial_symtab
*
1976 dbx_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
1977 const char **include_list
, int num_includes
,
1978 int capping_symbol_offset
, CORE_ADDR capping_text
,
1979 struct partial_symtab
**dependency_list
,
1980 int number_dependencies
,
1981 int textlow_not_set
)
1984 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1986 if (capping_symbol_offset
!= -1)
1987 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
1988 pst
->set_text_high (capping_text
);
1990 /* Under Solaris, the N_SO symbols always have a value of 0,
1991 instead of the usual address of the .o file. Therefore,
1992 we have to do some tricks to fill in texthigh and textlow.
1993 The first trick is: if we see a static
1994 or global function, and the textlow for the current pst
1995 is not set (ie: textlow_not_set), then we use that function's
1996 address for the textlow of the pst. */
1998 /* Now, to fill in texthigh, we remember the last function seen
1999 in the .o file. Also, there's a hack in
2000 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2001 to here via the misc_info field. Therefore, we can fill in
2002 a reliable texthigh by taking the address plus size of the
2003 last function in the file. */
2005 if (!pst
->text_high_valid
&& last_function_name
2006 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2009 struct bound_minimal_symbol minsym
;
2011 const char *colon
= strchr (last_function_name
, ':');
2015 n
= colon
- last_function_name
;
2016 char *p
= (char *) alloca (n
+ 2);
2017 strncpy (p
, last_function_name
, n
);
2020 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2021 if (minsym
.minsym
== NULL
)
2023 /* Sun Fortran appends an underscore to the minimal symbol name,
2024 try again with an appended underscore if the minimal symbol
2028 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2032 pst
->set_text_high (BMSYMBOL_VALUE_ADDRESS (minsym
)
2033 + MSYMBOL_SIZE (minsym
.minsym
));
2035 last_function_name
= NULL
;
2038 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2040 /* This test will be true if the last .o file is only data. */
2041 else if (textlow_not_set
)
2042 pst
->set_text_low (pst
->text_high ());
2045 struct partial_symtab
*p1
;
2047 /* If we know our own starting text address, then walk through all other
2048 psymtabs for this objfile, and if any didn't know their ending text
2049 address, set it to our starting address. Take care to not set our
2050 own ending address to our starting address. */
2052 ALL_OBJFILE_PSYMTABS (objfile
, p1
)
2054 if (!p1
->text_high_valid
&& p1
->text_low_valid
&& p1
!= pst
)
2055 p1
->set_text_high (pst
->text_low ());
2059 /* End of kludge for patching Solaris textlow and texthigh. */
2061 end_psymtab_common (objfile
, pst
);
2063 pst
->number_of_dependencies
= number_dependencies
;
2064 if (number_dependencies
)
2066 pst
->dependencies
= XOBNEWVEC (&objfile
->objfile_obstack
,
2067 struct partial_symtab
*,
2068 number_dependencies
);
2069 memcpy (pst
->dependencies
, dependency_list
,
2070 number_dependencies
* sizeof (struct partial_symtab
*));
2073 pst
->dependencies
= 0;
2075 for (i
= 0; i
< num_includes
; i
++)
2077 struct partial_symtab
*subpst
=
2078 allocate_psymtab (include_list
[i
], objfile
);
2080 subpst
->read_symtab_private
=
2081 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2083 LDSYMLEN (subpst
) = 0;
2085 /* We could save slight bits of space by only making one of these,
2086 shared by the entire set of include files. FIXME-someday. */
2087 subpst
->dependencies
=
2088 XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
2089 subpst
->dependencies
[0] = pst
;
2090 subpst
->number_of_dependencies
= 1;
2092 subpst
->globals_offset
=
2093 subpst
->n_global_syms
=
2094 subpst
->statics_offset
=
2095 subpst
->n_static_syms
= 0;
2098 subpst
->compunit_symtab
= 0;
2099 subpst
->read_symtab
= pst
->read_symtab
;
2102 if (num_includes
== 0
2103 && number_dependencies
== 0
2104 && pst
->n_global_syms
== 0
2105 && pst
->n_static_syms
== 0
2106 && has_line_numbers
== 0)
2108 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2109 it is on the obstack, but we can forget to chain it on the list. */
2110 /* Empty psymtabs happen as a result of header files which don't have
2111 any symbols in them. There can be a lot of them. But this check
2112 is wrong, in that a psymtab with N_SLINE entries but nothing else
2113 is not empty, but we don't realize that. Fixing that without slowing
2114 things down might be tricky. */
2116 discard_psymtab (objfile
, pst
);
2118 /* Indicate that psymtab was thrown away. */
2125 dbx_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
2131 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2132 "Shouldn't happen.\n",
2137 /* Read in all partial symtabs on which this one is dependent. */
2138 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2139 if (!pst
->dependencies
[i
]->readin
)
2141 /* Inform about additional files that need to be read in. */
2144 fputs_filtered (" ", gdb_stdout
);
2146 fputs_filtered ("and ", gdb_stdout
);
2148 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2149 wrap_here (""); /* Flush output. */
2150 gdb_flush (gdb_stdout
);
2152 dbx_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
2155 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2157 /* Init stuff necessary for reading in symbols */
2159 scoped_free_pendings free_pending
;
2160 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2161 symbol_size
= SYMBOL_SIZE (pst
);
2163 /* Read in this file's symbols. */
2164 bfd_seek (objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2165 read_ofile_symtab (objfile
, pst
);
2171 /* Read in all of the symbols for a given psymtab for real.
2172 Be verbose about it if the user wants that. SELF is not NULL. */
2175 dbx_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
2179 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2180 "Shouldn't happen.\n",
2185 if (LDSYMLEN (self
) || self
->number_of_dependencies
)
2187 /* Print the message now, before reading the string table,
2188 to avoid disconcerting pauses. */
2191 printf_filtered ("Reading in symbols for %s...", self
->filename
);
2192 gdb_flush (gdb_stdout
);
2195 next_symbol_text_func
= dbx_next_symbol_text
;
2198 scoped_restore restore_stabs_data
= make_scoped_restore (&stabs_data
);
2199 gdb::unique_xmalloc_ptr
<gdb_byte
> data_holder
;
2200 if (DBX_STAB_SECTION (objfile
))
2203 = symfile_relocate_debug_section (objfile
,
2204 DBX_STAB_SECTION (objfile
),
2206 data_holder
.reset (stabs_data
);
2209 dbx_psymtab_to_symtab_1 (objfile
, self
);
2212 /* Match with global symbols. This only needs to be done once,
2213 after all of the symtabs and dependencies have been read in. */
2214 scan_file_globals (objfile
);
2216 /* Finish up the debug error message. */
2218 printf_filtered ("done.\n");
2222 /* Read in a defined section of a specific object file's symbols. */
2225 read_ofile_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
2227 const char *namestring
;
2228 struct external_nlist
*bufp
;
2229 struct internal_nlist nlist
;
2231 unsigned max_symnum
;
2233 int sym_offset
; /* Offset to start of symbols to read */
2234 int sym_size
; /* Size of symbols to read */
2235 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2236 int text_size
; /* Size of text segment for symbols */
2237 struct section_offsets
*section_offsets
;
2239 sym_offset
= LDSYMOFF (pst
);
2240 sym_size
= LDSYMLEN (pst
);
2241 text_offset
= pst
->text_low ();
2242 text_size
= pst
->text_high () - pst
->text_low ();
2243 section_offsets
= objfile
->section_offsets
;
2245 dbxread_objfile
= objfile
;
2247 stringtab_global
= DBX_STRINGTAB (objfile
);
2248 set_last_source_file (NULL
);
2250 abfd
= objfile
->obfd
;
2251 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2252 symbuf_end
= symbuf_idx
= 0;
2254 symbuf_left
= sym_offset
+ sym_size
;
2256 /* It is necessary to actually read one symbol *before* the start
2257 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2258 occurs before the N_SO symbol.
2260 Detecting this in read_dbx_symtab
2261 would slow down initial readin, so we look for it here instead. */
2262 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2264 stabs_seek (sym_offset
- symbol_size
);
2266 bufp
= &symbuf
[symbuf_idx
++];
2267 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2268 OBJSTAT (objfile
, n_stabs
++);
2270 namestring
= set_namestring (objfile
, &nlist
);
2272 processing_gcc_compilation
= 0;
2273 if (nlist
.n_type
== N_TEXT
)
2275 const char *tempstring
= namestring
;
2277 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2278 processing_gcc_compilation
= 1;
2279 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2280 processing_gcc_compilation
= 2;
2281 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2283 if (startswith (tempstring
, "__gnu_compiled"))
2284 processing_gcc_compilation
= 2;
2289 /* The N_SO starting this symtab is the first symbol, so we
2290 better not check the symbol before it. I'm not this can
2291 happen, but it doesn't hurt to check for it. */
2292 stabs_seek (sym_offset
);
2293 processing_gcc_compilation
= 0;
2296 if (symbuf_idx
== symbuf_end
)
2298 bufp
= &symbuf
[symbuf_idx
];
2299 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2300 error (_("First symbol in segment of executable not a source symbol"));
2302 max_symnum
= sym_size
/ symbol_size
;
2305 symnum
< max_symnum
;
2308 QUIT
; /* Allow this to be interruptable. */
2309 if (symbuf_idx
== symbuf_end
)
2311 bufp
= &symbuf
[symbuf_idx
++];
2312 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2313 OBJSTAT (objfile
, n_stabs
++);
2315 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2317 namestring
= set_namestring (objfile
, &nlist
);
2321 if (sizeof (nlist
.n_value
) > 4
2322 /* We are a 64-bit debugger debugging a 32-bit program. */
2323 && (type
== N_LSYM
|| type
== N_PSYM
))
2324 /* We have to be careful with the n_value in the case of N_LSYM
2325 and N_PSYM entries, because they are signed offsets from frame
2326 pointer, but we actually read them as unsigned 32-bit values.
2327 This is not a problem for 32-bit debuggers, for which negative
2328 values end up being interpreted correctly (as negative
2329 offsets) due to integer overflow.
2330 But we need to sign-extend the value for 64-bit debuggers,
2331 or we'll end up interpreting negative values as very large
2332 positive offsets. */
2333 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2334 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2335 namestring
, section_offsets
, objfile
,
2336 PST_LANGUAGE (pst
));
2338 /* We skip checking for a new .o or -l file; that should never
2339 happen in this routine. */
2340 else if (type
== N_TEXT
)
2342 /* I don't think this code will ever be executed, because
2343 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2344 the N_SO symbol which starts this source file.
2345 However, there is no reason not to accept
2346 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2348 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2349 processing_gcc_compilation
= 1;
2350 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2351 processing_gcc_compilation
= 2;
2353 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2354 || type
== (unsigned char) N_NBTEXT
)
2356 /* Global symbol: see if we came across a dbx defintion for
2357 a corresponding symbol. If so, store the value. Remove
2358 syms from the chain when their values are stored, but
2359 search the whole chain, as there may be several syms from
2360 different files with the same name. */
2361 /* This is probably not true. Since the files will be read
2362 in one at a time, each reference to a global symbol will
2363 be satisfied in each file as it appears. So we skip this
2369 /* In a Solaris elf file, this variable, which comes from the value
2370 of the N_SO symbol, will still be 0. Luckily, text_offset, which
2371 comes from low text address of PST, is correct. */
2372 if (get_last_source_start_addr () == 0)
2373 set_last_source_start_addr (text_offset
);
2375 /* In reordered executables last_source_start_addr may not be the
2376 lower bound for this symtab, instead use text_offset which comes
2377 from the low text address of PST, which is correct. */
2378 if (get_last_source_start_addr () > text_offset
)
2379 set_last_source_start_addr (text_offset
);
2381 pst
->compunit_symtab
= end_symtab (text_offset
+ text_size
,
2382 SECT_OFF_TEXT (objfile
));
2386 dbxread_objfile
= NULL
;
2390 /* Record the namespace that the function defined by SYMBOL was
2391 defined in, if necessary. BLOCK is the associated block; use
2392 OBSTACK for allocation. */
2395 cp_set_block_scope (const struct symbol
*symbol
,
2396 struct block
*block
,
2397 struct obstack
*obstack
)
2399 if (SYMBOL_DEMANGLED_NAME (symbol
) != NULL
)
2401 /* Try to figure out the appropriate namespace from the
2404 /* FIXME: carlton/2003-04-15: If the function in question is
2405 a method of a class, the name will actually include the
2406 name of the class as well. This should be harmless, but
2407 is a little unfortunate. */
2409 const char *name
= SYMBOL_DEMANGLED_NAME (symbol
);
2410 unsigned int prefix_len
= cp_entire_prefix_len (name
);
2412 block_set_scope (block
,
2413 (const char *) obstack_copy0 (obstack
, name
, prefix_len
),
2418 /* This handles a single symbol from the symbol-file, building symbols
2419 into a GDB symtab. It takes these arguments and an implicit argument.
2421 TYPE is the type field of the ".stab" symbol entry.
2422 DESC is the desc field of the ".stab" entry.
2423 VALU is the value field of the ".stab" entry.
2424 NAME is the symbol name, in our address space.
2425 SECTION_OFFSETS is a set of amounts by which the sections of this
2426 object file were relocated when it was loaded into memory. Note
2427 that these section_offsets are not the objfile->section_offsets but
2428 the pst->section_offsets. All symbols that refer to memory
2429 locations need to be offset by these amounts.
2430 OBJFILE is the object file from which we are reading symbols. It
2431 is used in end_symtab.
2432 LANGUAGE is the language of the symtab.
2436 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, const char *name
,
2437 const struct section_offsets
*section_offsets
,
2438 struct objfile
*objfile
, enum language language
)
2440 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2441 struct context_stack
*newobj
;
2442 struct context_stack cstk
;
2443 /* This remembers the address of the start of a function. It is
2444 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2445 are relative to the current function's start address. On systems
2446 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2447 and is used to relocate these symbol types rather than
2449 static CORE_ADDR function_start_offset
;
2451 /* This holds the address of the start of a function, without the
2452 system peculiarities of function_start_offset. */
2453 static CORE_ADDR last_function_start
;
2455 /* If this is nonzero, we've seen an N_SLINE since the start of the
2456 current function. We use this to tell us to move the first sline
2457 to the beginning of the function regardless of what its given
2459 static int sline_found_in_function
= 1;
2461 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2462 source file. Used to detect the SunPRO solaris compiler. */
2463 static int n_opt_found
;
2465 /* Something is wrong if we see real data before seeing a source
2468 if (get_last_source_file () == NULL
&& type
!= (unsigned char) N_SO
)
2470 /* Ignore any symbols which appear before an N_SO symbol.
2471 Currently no one puts symbols there, but we should deal
2472 gracefully with the case. A complain()t might be in order,
2473 but this should not be an error (). */
2482 if (*name
== '\000')
2484 /* This N_FUN marks the end of a function. This closes off
2485 the current block. */
2486 struct block
*block
;
2488 if (outermost_context_p ())
2490 lbrac_mismatch_complaint (symnum
);
2494 /* The following check is added before recording line 0 at
2495 end of function so as to handle hand-generated stabs
2496 which may have an N_FUN stabs at the end of the function,
2497 but no N_SLINE stabs. */
2498 if (sline_found_in_function
)
2500 CORE_ADDR addr
= last_function_start
+ valu
;
2502 record_line (get_current_subfile (), 0,
2503 gdbarch_addr_bits_remove (gdbarch
, addr
));
2506 within_function
= 0;
2507 cstk
= pop_context ();
2509 /* Make a block for the local symbols within. */
2510 block
= finish_block (cstk
.name
,
2511 cstk
.old_blocks
, NULL
,
2512 cstk
.start_addr
, cstk
.start_addr
+ valu
);
2514 /* For C++, set the block's scope. */
2515 if (SYMBOL_LANGUAGE (cstk
.name
) == language_cplus
)
2516 cp_set_block_scope (cstk
.name
, block
, &objfile
->objfile_obstack
);
2518 /* May be switching to an assembler file which may not be using
2519 block relative stabs, so reset the offset. */
2520 function_start_offset
= 0;
2525 sline_found_in_function
= 0;
2527 /* Relocate for dynamic loading. */
2528 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2529 valu
= gdbarch_addr_bits_remove (gdbarch
, valu
);
2530 last_function_start
= valu
;
2532 goto define_a_symbol
;
2535 /* This "symbol" just indicates the start of an inner lexical
2536 context within a function. */
2538 /* Ignore extra outermost context from SunPRO cc and acc. */
2539 if (n_opt_found
&& desc
== 1)
2542 valu
+= function_start_offset
;
2544 push_context (desc
, valu
);
2548 /* This "symbol" just indicates the end of an inner lexical
2549 context that was started with N_LBRAC. */
2551 /* Ignore extra outermost context from SunPRO cc and acc. */
2552 if (n_opt_found
&& desc
== 1)
2555 valu
+= function_start_offset
;
2557 if (outermost_context_p ())
2559 lbrac_mismatch_complaint (symnum
);
2563 cstk
= pop_context ();
2564 if (desc
!= cstk
.depth
)
2565 lbrac_mismatch_complaint (symnum
);
2567 if (*get_local_symbols () != NULL
)
2569 /* GCC development snapshots from March to December of
2570 2000 would output N_LSYM entries after N_LBRAC
2571 entries. As a consequence, these symbols are simply
2572 discarded. Complain if this is the case. */
2573 complaint (_("misplaced N_LBRAC entry; discarding local "
2574 "symbols which have no enclosing block"));
2576 *get_local_symbols () = cstk
.locals
;
2578 if (get_context_stack_depth () > 1)
2580 /* This is not the outermost LBRAC...RBRAC pair in the
2581 function, its local symbols preceded it, and are the ones
2582 just recovered from the context stack. Define the block
2583 for them (but don't bother if the block contains no
2584 symbols. Should we complain on blocks without symbols?
2585 I can't think of any useful purpose for them). */
2586 if (*get_local_symbols () != NULL
)
2588 /* Muzzle a compiler bug that makes end < start.
2590 ??? Which compilers? Is this ever harmful?. */
2591 if (cstk
.start_addr
> valu
)
2593 complaint (_("block start larger than block end"));
2594 cstk
.start_addr
= valu
;
2596 /* Make a block for the local symbols within. */
2597 finish_block (0, cstk
.old_blocks
, NULL
,
2598 cstk
.start_addr
, valu
);
2603 /* This is the outermost LBRAC...RBRAC pair. There is no
2604 need to do anything; leave the symbols that preceded it
2605 to be attached to the function's own block. We need to
2606 indicate that we just moved outside of the function. */
2607 within_function
= 0;
2614 /* This kind of symbol indicates the start of an object file.
2615 Relocate for dynamic loading. */
2616 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2620 /* This type of symbol indicates the start of data for one
2621 source file. Finish the symbol table of the previous source
2622 file (if any) and start accumulating a new symbol table.
2623 Relocate for dynamic loading. */
2624 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2628 if (get_last_source_file ())
2630 /* Check if previous symbol was also an N_SO (with some
2631 sanity checks). If so, that one was actually the
2632 directory name, and the current one is the real file
2633 name. Patch things up. */
2634 if (previous_stab_code
== (unsigned char) N_SO
)
2636 patch_subfile_names (get_current_subfile (), name
);
2637 break; /* Ignore repeated SOs. */
2639 end_symtab (valu
, SECT_OFF_TEXT (objfile
));
2643 /* Null name means this just marks the end of text for this .o
2644 file. Don't start a new symtab in this case. */
2645 if (*name
== '\000')
2648 function_start_offset
= 0;
2651 start_symtab (objfile
, name
, NULL
, valu
, language
);
2652 record_debugformat ("stabs");
2656 /* This type of symbol indicates the start of data for a
2657 sub-source-file, one whose contents were copied or included
2658 in the compilation of the main source file (whose name was
2659 given in the N_SO symbol). Relocate for dynamic loading. */
2660 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2661 start_subfile (name
);
2666 add_new_header_file (name
, valu
);
2667 start_subfile (name
);
2671 start_subfile (pop_subfile ());
2675 add_old_header_file (name
, valu
);
2679 /* This type of "symbol" really just records one line-number --
2680 core-address correspondence. Enter it in the line list for
2681 this symbol table. */
2683 /* Relocate for dynamic loading and for ELF acc
2684 function-relative symbols. */
2685 valu
+= function_start_offset
;
2687 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
2688 middle of the prologue instead of right at the start of the
2689 function. To deal with this we record the address for the
2690 first N_SLINE stab to be the start of the function instead of
2691 the listed location. We really shouldn't to this. When
2692 compiling with optimization, this first N_SLINE stab might be
2693 optimized away. Other (non-GCC) compilers don't emit this
2694 stab at all. There is no real harm in having an extra
2695 numbered line, although it can be a bit annoying for the
2696 user. However, it totally screws up our testsuite.
2698 So for now, keep adjusting the address of the first N_SLINE
2699 stab, but only for code compiled with GCC. */
2701 if (within_function
&& sline_found_in_function
== 0)
2703 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
2704 last_function_start
: valu
;
2706 record_line (get_current_subfile (), desc
,
2707 gdbarch_addr_bits_remove (gdbarch
, addr
));
2708 sline_found_in_function
= 1;
2711 record_line (get_current_subfile (), desc
,
2712 gdbarch_addr_bits_remove (gdbarch
, valu
));
2716 common_block_start (name
, objfile
);
2720 common_block_end (objfile
);
2723 /* The following symbol types need to have the appropriate
2724 offset added to their value; then we process symbol
2725 definitions in the name. */
2727 case N_STSYM
: /* Static symbol in data segment. */
2728 case N_LCSYM
: /* Static symbol in BSS segment. */
2729 case N_ROSYM
: /* Static symbol in read-only data segment. */
2730 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2731 Solaris 2's stabs-in-elf makes *most* symbols relative but
2732 leaves a few absolute (at least for Solaris 2.1 and version
2733 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
2734 the fence. .stab "foo:S...",N_STSYM is absolute (ld
2735 relocates it) .stab "foo:V...",N_STSYM is relative (section
2736 base subtracted). This leaves us no choice but to search for
2737 the 'S' or 'V'... (or pass the whole section_offsets stuff
2738 down ONE MORE function call level, which we really don't want
2743 /* Normal object file and NLMs have non-zero text seg offsets,
2744 but don't need their static syms offset in this fashion.
2745 XXX - This is really a crock that should be fixed in the
2746 solib handling code so that I don't have to work around it
2749 if (!symfile_relocatable
)
2751 p
= strchr (name
, ':');
2752 if (p
!= 0 && p
[1] == 'S')
2754 /* The linker relocated it. We don't want to add a
2755 Sun-stabs Tfoo.foo-like offset, but we *do*
2756 want to add whatever solib.c passed to
2757 symbol_file_add as addr (this is known to affect
2758 SunOS 4, and I suspect ELF too). Since there is no
2759 Ttext.text symbol, we can get addr from the text offset. */
2760 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2761 goto define_a_symbol
;
2764 /* Since it's not the kludge case, re-dispatch to the right
2775 internal_error (__FILE__
, __LINE__
,
2776 _("failed internal consistency check"));
2780 case_N_STSYM
: /* Static symbol in data segment. */
2781 case N_DSLINE
: /* Source line number, data segment. */
2782 valu
+= ANOFFSET (section_offsets
, SECT_OFF_DATA (objfile
));
2783 goto define_a_symbol
;
2785 case_N_LCSYM
: /* Static symbol in BSS segment. */
2786 case N_BSLINE
: /* Source line number, BSS segment. */
2787 /* N_BROWS: overlaps with N_BSLINE. */
2788 valu
+= ANOFFSET (section_offsets
, SECT_OFF_BSS (objfile
));
2789 goto define_a_symbol
;
2791 case_N_ROSYM
: /* Static symbol in read-only data segment. */
2792 valu
+= ANOFFSET (section_offsets
, SECT_OFF_RODATA (objfile
));
2793 goto define_a_symbol
;
2795 case N_ENTRY
: /* Alternate entry point. */
2796 /* Relocate for dynamic loading. */
2797 valu
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT (objfile
));
2798 goto define_a_symbol
;
2800 /* The following symbol types we don't know how to process.
2801 Handle them in a "default" way, but complain to people who
2804 case N_CATCH
: /* Exception handler catcher. */
2805 case N_EHDECL
: /* Exception handler name. */
2806 case N_PC
: /* Global symbol in Pascal. */
2807 case N_M2C
: /* Modula-2 compilation unit. */
2808 /* N_MOD2: overlaps with N_EHDECL. */
2809 case N_SCOPE
: /* Modula-2 scope information. */
2810 case N_ECOML
: /* End common (local name). */
2811 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
2816 unknown_symtype_complaint (hex_string (type
));
2820 /* These symbol types don't need the address field relocated,
2821 since it is either unused, or is absolute. */
2822 case N_GSYM
: /* Global variable. */
2823 case N_NSYMS
: /* Number of symbols (Ultrix). */
2824 case N_NOMAP
: /* No map? (Ultrix). */
2825 case N_RSYM
: /* Register variable. */
2826 case N_DEFD
: /* Modula-2 GNU module dependency. */
2827 case N_SSYM
: /* Struct or union element. */
2828 case N_LSYM
: /* Local symbol in stack. */
2829 case N_PSYM
: /* Parameter variable. */
2830 case N_LENG
: /* Length of preceding symbol type. */
2834 const char *colon_pos
= strchr (name
, ':');
2836 if (colon_pos
== NULL
)
2839 deftype
= colon_pos
[1];
2845 /* Deal with the SunPRO 3.0 compiler which omits the
2846 address from N_FUN symbols. */
2848 && valu
== ANOFFSET (section_offsets
,
2849 SECT_OFF_TEXT (objfile
))
2850 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2852 CORE_ADDR minsym_valu
=
2853 find_stab_function_addr (name
, get_last_source_file (),
2856 /* The function find_stab_function_addr will return
2857 0 if the minimal symbol wasn't found.
2858 (Unfortunately, this might also be a valid
2859 address.) Anyway, if it *does* return 0, it is
2860 likely that the value was set correctly to begin
2862 if (minsym_valu
!= 0)
2866 /* These addresses are absolute. */
2867 function_start_offset
= valu
;
2869 within_function
= 1;
2871 if (get_context_stack_depth () > 1)
2873 complaint (_("unmatched N_LBRAC before symtab pos %d"),
2878 if (!outermost_context_p ())
2880 struct block
*block
;
2882 cstk
= pop_context ();
2883 /* Make a block for the local symbols within. */
2884 block
= finish_block (cstk
.name
,
2885 cstk
.old_blocks
, NULL
,
2886 cstk
.start_addr
, valu
);
2888 /* For C++, set the block's scope. */
2889 if (SYMBOL_LANGUAGE (cstk
.name
) == language_cplus
)
2890 cp_set_block_scope (cstk
.name
, block
,
2891 &objfile
->objfile_obstack
);
2894 newobj
= push_context (0, valu
);
2895 newobj
->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
2899 define_symbol (valu
, name
, desc
, type
, objfile
);
2905 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2906 for a bunch of other flags, too. Someday we may parse their
2907 flags; for now we ignore theirs and hope they'll ignore ours. */
2908 case N_OPT
: /* Solaris 2: Compiler options. */
2911 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2913 processing_gcc_compilation
= 2;
2920 case N_MAIN
: /* Name of main routine. */
2921 /* FIXME: If one has a symbol file with N_MAIN and then replaces
2922 it with a symbol file with "main" and without N_MAIN. I'm
2923 not sure exactly what rule to follow but probably something
2924 like: N_MAIN takes precedence over "main" no matter what
2925 objfile it is in; If there is more than one N_MAIN, choose
2926 the one in the symfile_objfile; If there is more than one
2927 N_MAIN within a given objfile, complain() and choose
2928 arbitrarily. (kingdon) */
2930 set_objfile_main_name (objfile
, name
, language_unknown
);
2933 /* The following symbol types can be ignored. */
2934 case N_OBJ
: /* Solaris 2: Object file dir and name. */
2935 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
2936 /* N_UNDF: Solaris 2: File separator mark. */
2937 /* N_UNDF: -- we will never encounter it, since we only process
2938 one file's symbols at once. */
2939 case N_ENDM
: /* Solaris 2: End of module. */
2940 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2944 /* '#' is a GNU C extension to allow one symbol to refer to another
2947 Generally this is used so that an alias can refer to its main
2952 /* Initialize symbol reference names and determine if this is a
2953 definition. If a symbol reference is being defined, go ahead
2954 and add it. Otherwise, just return. */
2956 const char *s
= name
;
2959 /* If this stab defines a new reference ID that is not on the
2960 reference list, then put it on the reference list.
2962 We go ahead and advance NAME past the reference, even though
2963 it is not strictly necessary at this time. */
2964 refnum
= symbol_reference_defined (&s
);
2966 if (!ref_search (refnum
))
2967 ref_add (refnum
, 0, name
, valu
);
2971 previous_stab_code
= type
;
2974 /* FIXME: The only difference between this and elfstab_build_psymtabs
2975 is the call to install_minimal_symbols for elf, and the support for
2976 split sections. If the differences are really that small, the code
2977 should be shared. */
2979 /* Scan and build partial symbols for an coff symbol file.
2980 The coff file has already been processed to get its minimal symbols.
2982 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2985 OBJFILE is the object file we are reading symbols from.
2986 ADDR is the address relative to which the symbols are (e.g.
2987 the base address of the text segment).
2988 TEXTADDR is the address of the text section.
2989 TEXTSIZE is the size of the text section.
2990 STABSECTS is the list of .stab sections in OBJFILE.
2991 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2992 .stabstr section exists.
2994 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2995 adjusted for coff details. */
2998 coffstab_build_psymtabs (struct objfile
*objfile
,
2999 CORE_ADDR textaddr
, unsigned int textsize
,
3000 struct stab_section_list
*stabsects
,
3001 file_ptr stabstroffset
, unsigned int stabstrsize
)
3004 bfd
*sym_bfd
= objfile
->obfd
;
3005 char *name
= bfd_get_filename (sym_bfd
);
3006 unsigned int stabsize
;
3008 DBX_TEXT_ADDR (objfile
) = textaddr
;
3009 DBX_TEXT_SIZE (objfile
) = textsize
;
3011 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3012 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
3013 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3015 if (stabstrsize
> bfd_get_size (sym_bfd
))
3016 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3017 DBX_STRINGTAB (objfile
) = (char *)
3018 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3019 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3021 /* Now read in the string table in one big gulp. */
3023 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3025 perror_with_name (name
);
3026 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3027 if (val
!= stabstrsize
)
3028 perror_with_name (name
);
3030 stabsread_new_init ();
3031 free_header_files ();
3032 init_header_files ();
3034 processing_acc_compilation
= 1;
3036 /* In a coff file, we've already installed the minimal symbols that came
3037 from the coff (non-stab) symbol table, so always act like an
3038 incremental load here. */
3039 if (stabsects
->next
== NULL
)
3041 stabsize
= bfd_section_size (sym_bfd
, stabsects
->section
);
3042 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3043 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3047 struct stab_section_list
*stabsect
;
3049 DBX_SYMCOUNT (objfile
) = 0;
3050 for (stabsect
= stabsects
; stabsect
!= NULL
; stabsect
= stabsect
->next
)
3052 stabsize
= bfd_section_size (sym_bfd
, stabsect
->section
);
3053 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
3056 DBX_SYMTAB_OFFSET (objfile
) = stabsects
->section
->filepos
;
3058 symbuf_sections
= stabsects
->next
;
3059 symbuf_left
= bfd_section_size (sym_bfd
, stabsects
->section
);
3063 dbx_symfile_read (objfile
, 0);
3066 /* Scan and build partial symbols for an ELF symbol file.
3067 This ELF file has already been processed to get its minimal symbols.
3069 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3072 OBJFILE is the object file we are reading symbols from.
3073 ADDR is the address relative to which the symbols are (e.g.
3074 the base address of the text segment).
3075 STABSECT is the BFD section information for the .stab section.
3076 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3077 .stabstr section exists.
3079 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3080 adjusted for elf details. */
3083 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
3084 file_ptr stabstroffset
, unsigned int stabstrsize
)
3087 bfd
*sym_bfd
= objfile
->obfd
;
3088 char *name
= bfd_get_filename (sym_bfd
);
3090 /* Find the first and last text address. dbx_symfile_read seems to
3092 find_text_range (sym_bfd
, objfile
);
3094 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3095 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3096 DBX_SYMCOUNT (objfile
)
3097 = bfd_section_size (objfile
->obfd
, stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3098 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3099 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3100 DBX_STAB_SECTION (objfile
) = stabsect
;
3102 if (stabstrsize
> bfd_get_size (sym_bfd
))
3103 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3104 DBX_STRINGTAB (objfile
) = (char *)
3105 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3106 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3108 /* Now read in the string table in one big gulp. */
3110 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3112 perror_with_name (name
);
3113 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3114 if (val
!= stabstrsize
)
3115 perror_with_name (name
);
3117 stabsread_new_init ();
3118 free_header_files ();
3119 init_header_files ();
3121 processing_acc_compilation
= 1;
3124 symbuf_left
= bfd_section_size (objfile
->obfd
, stabsect
);
3126 scoped_restore restore_stabs_data
= make_scoped_restore (&stabs_data
);
3127 gdb::unique_xmalloc_ptr
<gdb_byte
> data_holder
;
3129 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3131 data_holder
.reset (stabs_data
);
3133 /* In an elf file, we've already installed the minimal symbols that came
3134 from the elf (non-stab) symbol table, so always act like an
3135 incremental load here. dbx_symfile_read should not generate any new
3136 minimal symbols, since we will have already read the ELF dynamic symbol
3137 table and normal symbol entries won't be in the ".stab" section; but in
3138 case it does, it will install them itself. */
3139 dbx_symfile_read (objfile
, 0);
3142 /* Scan and build partial symbols for a file with special sections for stabs
3143 and stabstrings. The file has already been processed to get its minimal
3144 symbols, and any other symbols that might be necessary to resolve GSYMs.
3146 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3149 OBJFILE is the object file we are reading symbols from.
3150 ADDR is the address relative to which the symbols are (e.g. the base address
3151 of the text segment).
3152 STAB_NAME is the name of the section that contains the stabs.
3153 STABSTR_NAME is the name of the section that contains the stab strings.
3155 This routine is mostly copied from dbx_symfile_init and
3156 dbx_symfile_read. */
3159 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3160 char *stabstr_name
, char *text_name
)
3163 bfd
*sym_bfd
= objfile
->obfd
;
3164 char *name
= bfd_get_filename (sym_bfd
);
3166 asection
*stabstrsect
;
3167 asection
*text_sect
;
3168 struct dbx_symfile_info
*dbx
;
3170 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3171 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3177 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3178 "but not string section (%s)"),
3179 stab_name
, stabstr_name
);
3181 dbx
= XCNEW (struct dbx_symfile_info
);
3182 set_objfile_data (objfile
, dbx_objfile_data_key
, dbx
);
3184 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3186 error (_("Can't find %s section in symbol file"), text_name
);
3187 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (sym_bfd
, text_sect
);
3188 DBX_TEXT_SIZE (objfile
) = bfd_section_size (sym_bfd
, text_sect
);
3190 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3191 DBX_SYMCOUNT (objfile
) = bfd_section_size (sym_bfd
, stabsect
)
3192 / DBX_SYMBOL_SIZE (objfile
);
3193 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (sym_bfd
, stabstrsect
);
3194 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING
3198 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3199 error (_("ridiculous string table size: %d bytes"),
3200 DBX_STRINGTAB_SIZE (objfile
));
3201 DBX_STRINGTAB (objfile
) = (char *)
3202 obstack_alloc (&objfile
->objfile_obstack
,
3203 DBX_STRINGTAB_SIZE (objfile
) + 1);
3204 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3206 /* Now read in the string table in one big gulp. */
3208 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3209 stabstrsect
, /* bfd section */
3210 DBX_STRINGTAB (objfile
), /* input buffer */
3211 0, /* offset into section */
3212 DBX_STRINGTAB_SIZE (objfile
)); /* amount to
3216 perror_with_name (name
);
3218 stabsread_new_init ();
3219 free_header_files ();
3220 init_header_files ();
3222 /* Now, do an incremental load. */
3224 processing_acc_compilation
= 1;
3225 dbx_symfile_read (objfile
, 0);
3228 static const struct sym_fns aout_sym_fns
=
3230 dbx_new_init
, /* init anything gbl to entire symtab */
3231 dbx_symfile_init
, /* read initial info, setup for sym_read() */
3232 dbx_symfile_read
, /* read a symbol file into symtab */
3233 NULL
, /* sym_read_psymbols */
3234 dbx_symfile_finish
, /* finished with file, cleanup */
3235 default_symfile_offsets
, /* parse user's offsets to internal form */
3236 default_symfile_segments
, /* Get segment information from a file. */
3238 default_symfile_relocate
, /* Relocate a debug section. */
3239 NULL
, /* sym_probe_fns */
3244 _initialize_dbxread (void)
3246 add_symtab_fns (bfd_target_aout_flavour
, &aout_sym_fns
);
3248 dbx_objfile_data_key
3249 = register_objfile_data_with_cleanup (NULL
, dbx_free_symfile_info
);