1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2021 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 objfile_key
<dbx_symfile_info
> 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_section_flags (sec
) & SEC_CODE
)
212 CORE_ADDR sec_start
= bfd_section_vma (sec
);
213 CORE_ADDR sec_end
= sec_start
+ bfd_section_size (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 legacy_psymtab
*pst_
)
250 instance (instance_
),
255 const char *name
; /* Name of header file */
256 int instance
; /* See above */
257 legacy_psymtab
*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
*, legacy_psymtab
*);
268 static void dbx_read_symtab (legacy_psymtab
*self
,
269 struct objfile
*objfile
);
271 static void dbx_expand_psymtab (legacy_psymtab
*, struct objfile
*);
273 static void read_dbx_symtab (minimal_symbol_reader
&, psymtab_storage
*,
276 static legacy_psymtab
*find_corresponding_bincl_psymtab (const char *,
279 static const char *dbx_next_symbol_text (struct objfile
*);
281 static void fill_symbuf (bfd
*);
283 static void dbx_symfile_init (struct objfile
*);
285 static void dbx_new_init (struct objfile
*);
287 static void dbx_symfile_read (struct objfile
*, symfile_add_flags
);
289 static void dbx_symfile_finish (struct objfile
*);
291 static void record_minimal_symbol (minimal_symbol_reader
&,
292 const char *, CORE_ADDR
, int,
295 static void add_new_header_file (const char *, int);
297 static void add_old_header_file (const char *, int);
299 static void add_this_object_header_file (int);
301 static legacy_psymtab
*start_psymtab (psymtab_storage
*, struct objfile
*,
302 const char *, CORE_ADDR
, int);
304 /* Free up old header file tables. */
307 free_header_files (void)
309 if (this_object_header_files
)
311 xfree (this_object_header_files
);
312 this_object_header_files
= NULL
;
314 n_allocated_this_object_header_files
= 0;
317 /* Allocate new header file tables. */
320 init_header_files (void)
322 n_allocated_this_object_header_files
= 10;
323 this_object_header_files
= XNEWVEC (int, 10);
326 /* Add header file number I for this object file
327 at the next successive FILENUM. */
330 add_this_object_header_file (int i
)
332 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
334 n_allocated_this_object_header_files
*= 2;
335 this_object_header_files
336 = (int *) xrealloc ((char *) this_object_header_files
,
337 n_allocated_this_object_header_files
* sizeof (int));
340 this_object_header_files
[n_this_object_header_files
++] = i
;
343 /* Add to this file an "old" header file, one already seen in
344 a previous object file. NAME is the header file's name.
345 INSTANCE is its instance code, to select among multiple
346 symbol tables for the same header file. */
349 add_old_header_file (const char *name
, int instance
)
351 struct header_file
*p
= HEADER_FILES (dbxread_objfile
);
354 for (i
= 0; i
< N_HEADER_FILES (dbxread_objfile
); i
++)
355 if (filename_cmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
357 add_this_object_header_file (i
);
360 repeated_header_complaint (name
, symnum
);
363 /* Add to this file a "new" header file: definitions for its types follow.
364 NAME is the header file's name.
365 Most often this happens only once for each distinct header file,
366 but not necessarily. If it happens more than once, INSTANCE has
367 a different value each time, and references to the header file
368 use INSTANCE values to select among them.
370 dbx output contains "begin" and "end" markers for each new header file,
371 but at this level we just need to know which files there have been;
372 so we record the file when its "begin" is seen and ignore the "end". */
375 add_new_header_file (const char *name
, int instance
)
378 struct header_file
*hfile
;
380 /* Make sure there is room for one more header file. */
382 i
= N_ALLOCATED_HEADER_FILES (dbxread_objfile
);
384 if (N_HEADER_FILES (dbxread_objfile
) == i
)
388 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = 10;
389 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
390 xmalloc (10 * sizeof (struct header_file
));
395 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = i
;
396 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
397 xrealloc ((char *) HEADER_FILES (dbxread_objfile
),
398 (i
* sizeof (struct header_file
)));
402 /* Create an entry for this header file. */
404 i
= N_HEADER_FILES (dbxread_objfile
)++;
405 hfile
= HEADER_FILES (dbxread_objfile
) + i
;
406 hfile
->name
= xstrdup (name
);
407 hfile
->instance
= instance
;
409 hfile
->vector
= XCNEWVEC (struct type
*, 10);
411 add_this_object_header_file (i
);
415 static struct type
**
416 explicit_lookup_type (int real_filenum
, int index
)
418 struct header_file
*f
= &HEADER_FILES (dbxread_objfile
)[real_filenum
];
420 if (index
>= f
->length
)
423 f
->vector
= (struct type
**)
424 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
425 memset (&f
->vector
[f
->length
/ 2],
426 '\0', f
->length
* sizeof (struct type
*) / 2);
428 return &f
->vector
[index
];
433 record_minimal_symbol (minimal_symbol_reader
&reader
,
434 const char *name
, CORE_ADDR address
, int type
,
435 struct objfile
*objfile
)
437 enum minimal_symbol_type ms_type
;
444 section
= SECT_OFF_TEXT (objfile
);
448 section
= SECT_OFF_DATA (objfile
);
452 section
= SECT_OFF_BSS (objfile
);
461 section
= SECT_OFF_DATA (objfile
);
464 /* I don't think this type actually exists; since a N_SETV is the result
465 of going over many .o files, it doesn't make sense to have one
467 ms_type
= mst_file_data
;
468 section
= SECT_OFF_DATA (objfile
);
475 ms_type
= mst_file_text
;
476 section
= SECT_OFF_TEXT (objfile
);
479 ms_type
= mst_file_data
;
481 /* Check for __DYNAMIC, which is used by Sun shared libraries.
482 Record it as global even if it's local, not global, so
483 lookup_minimal_symbol can find it. We don't check symbol_leading_char
484 because for SunOS4 it always is '_'. */
485 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
488 /* Same with virtual function tables, both global and static. */
490 const char *tempstring
= name
;
492 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
494 if (is_vtable_name (tempstring
))
497 section
= SECT_OFF_DATA (objfile
);
500 ms_type
= mst_file_bss
;
501 section
= SECT_OFF_BSS (objfile
);
504 ms_type
= mst_unknown
;
509 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
510 && address
< lowest_text_address
)
511 lowest_text_address
= address
;
513 reader
.record_with_info (name
, address
, ms_type
, section
);
516 /* Scan and build partial symbols for a symbol file.
517 We have been initialized by a call to dbx_symfile_init, which
518 put all the relevant info into a "struct dbx_symfile_info",
519 hung off the objfile structure. */
522 dbx_symfile_read (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
527 sym_bfd
= objfile
->obfd
;
529 /* .o and .nlm files are relocatables with text, data and bss segs based at
530 0. This flag disables special (Solaris stabs-in-elf only) fixups for
531 symbols with a value of 0. */
533 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
535 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
537 perror_with_name (objfile_name (objfile
));
539 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
540 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
542 scoped_free_pendings free_pending
;
544 minimal_symbol_reader
reader (objfile
);
546 /* Read stabs data from executable file and define symbols. */
548 psymbol_functions
*psf
= new psymbol_functions ();
549 psymtab_storage
*partial_symtabs
= psf
->get_partial_symtabs ().get ();
550 objfile
->qf
.emplace_front (psf
);
551 read_dbx_symtab (reader
, partial_symtabs
, objfile
);
553 /* Install any minimal symbols that have been collected as the current
554 minimal symbols for this objfile. */
559 /* Initialize anything that needs initializing when a completely new
560 symbol file is specified (not just adding some symbols from another
561 file, e.g. a shared library). */
564 dbx_new_init (struct objfile
*ignore
)
566 stabsread_new_init ();
567 init_header_files ();
571 /* dbx_symfile_init ()
572 is the dbx-specific initialization routine for reading symbols.
573 It is passed a struct objfile which contains, among other things,
574 the BFD for the file whose symbols are being read, and a slot for a pointer
575 to "private data" which we fill with goodies.
577 We read the string table into malloc'd space and stash a pointer to it.
579 Since BFD doesn't know how to read debug symbols in a format-independent
580 way (and may never do so...), we have to do it ourselves. We will never
581 be called unless this is an a.out (or very similar) file.
582 FIXME, there should be a cleaner peephole into the BFD environment here. */
584 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
587 dbx_symfile_init (struct objfile
*objfile
)
590 bfd
*sym_bfd
= objfile
->obfd
;
591 const char *name
= bfd_get_filename (sym_bfd
);
593 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
595 /* Allocate struct to keep track of the symfile. */
596 dbx_objfile_data_key
.emplace (objfile
);
598 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
599 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
600 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
602 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
603 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
604 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
606 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
608 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
610 error (_("Can't find .text section in symbol file"));
611 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (text_sect
);
612 DBX_TEXT_SIZE (objfile
) = bfd_section_size (text_sect
);
614 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
615 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
616 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
618 /* Read the string table and stash it away in the objfile_obstack.
619 When we blow away the objfile the string table goes away as well.
620 Note that gdb used to use the results of attempting to malloc the
621 string table, based on the size it read, as a form of sanity check
622 for botched byte swapping, on the theory that a byte swapped string
623 table size would be so totally bogus that the malloc would fail. Now
624 that we put in on the objfile_obstack, we can't do this since gdb gets
625 a fatal error (out of virtual memory) if the size is bogus. We can
626 however at least check to see if the size is less than the size of
627 the size field itself, or larger than the size of the entire file.
628 Note that all valid string tables have a size greater than zero, since
629 the bytes used to hold the size are included in the count. */
631 if (STRING_TABLE_OFFSET
== 0)
633 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
634 will never be zero, even when there is no string table. This
635 would appear to be a bug in bfd. */
636 DBX_STRINGTAB_SIZE (objfile
) = 0;
637 DBX_STRINGTAB (objfile
) = NULL
;
641 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
643 perror_with_name (name
);
645 memset (size_temp
, 0, sizeof (size_temp
));
646 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
649 perror_with_name (name
);
653 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
654 EOF if there is no string table, and attempting to read the size
655 from EOF will read zero bytes. */
656 DBX_STRINGTAB_SIZE (objfile
) = 0;
657 DBX_STRINGTAB (objfile
) = NULL
;
661 /* Read some data that would appear to be the string table size.
662 If there really is a string table, then it is probably the right
663 size. Byteswap if necessary and validate the size. Note that
664 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
665 random data that happened to be at STRING_TABLE_OFFSET, because
666 bfd can't tell us there is no string table, the sanity checks may
667 or may not catch this. */
668 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
670 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
671 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
672 error (_("ridiculous string table size (%d bytes)."),
673 DBX_STRINGTAB_SIZE (objfile
));
675 DBX_STRINGTAB (objfile
) =
676 (char *) obstack_alloc (&objfile
->objfile_obstack
,
677 DBX_STRINGTAB_SIZE (objfile
));
678 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
680 /* Now read in the string table in one big gulp. */
682 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
684 perror_with_name (name
);
685 val
= bfd_bread (DBX_STRINGTAB (objfile
),
686 DBX_STRINGTAB_SIZE (objfile
),
688 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
689 perror_with_name (name
);
694 /* Perform any local cleanups required when we are done with a particular
695 objfile. I.E, we are in the process of discarding all symbol information
696 for an objfile, freeing up all memory held for it, and unlinking the
697 objfile struct from the global list of known objfiles. */
700 dbx_symfile_finish (struct objfile
*objfile
)
702 free_header_files ();
705 dbx_symfile_info::~dbx_symfile_info ()
707 if (header_files
!= NULL
)
709 int i
= n_header_files
;
710 struct header_file
*hfiles
= header_files
;
714 xfree (hfiles
[i
].name
);
715 xfree (hfiles
[i
].vector
);
723 /* Buffer for reading the symbol table entries. */
724 static struct external_nlist symbuf
[4096];
725 static int symbuf_idx
;
726 static int symbuf_end
;
728 /* Name of last function encountered. Used in Solaris to approximate
729 object file boundaries. */
730 static const char *last_function_name
;
732 /* The address in memory of the string table of the object file we are
733 reading (which might not be the "main" object file, but might be a
734 shared library or some other dynamically loaded thing). This is
735 set by read_dbx_symtab when building psymtabs, and by
736 read_ofile_symtab when building symtabs, and is used only by
737 next_symbol_text. FIXME: If that is true, we don't need it when
738 building psymtabs, right? */
739 static char *stringtab_global
;
741 /* These variables are used to control fill_symbuf when the stabs
742 symbols are not contiguous (as may be the case when a COFF file is
743 linked using --split-by-reloc). */
744 static const std::vector
<asection
*> *symbuf_sections
;
745 static size_t sect_idx
;
746 static unsigned int symbuf_left
;
747 static unsigned int symbuf_read
;
749 /* This variable stores a global stabs buffer, if we read stabs into
750 memory in one chunk in order to process relocations. */
751 static bfd_byte
*stabs_data
;
753 /* Refill the symbol table input buffer
754 and set the variables that control fetching entries from it.
755 Reports an error if no data available.
756 This function can read past the end of the symbol table
757 (into the string table) but this does no harm. */
760 fill_symbuf (bfd
*sym_bfd
)
767 nbytes
= sizeof (symbuf
);
768 if (nbytes
> symbuf_left
)
769 nbytes
= symbuf_left
;
770 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
772 else if (symbuf_sections
== NULL
)
774 count
= sizeof (symbuf
);
775 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
779 if (symbuf_left
<= 0)
781 file_ptr filepos
= (*symbuf_sections
)[sect_idx
]->filepos
;
783 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
784 perror_with_name (bfd_get_filename (sym_bfd
));
785 symbuf_left
= bfd_section_size ((*symbuf_sections
)[sect_idx
]);
786 symbol_table_offset
= filepos
- symbuf_read
;
791 if (count
> sizeof (symbuf
))
792 count
= sizeof (symbuf
);
793 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
797 perror_with_name (bfd_get_filename (sym_bfd
));
798 else if (nbytes
== 0)
799 error (_("Premature end of file reading symbol table"));
800 symbuf_end
= nbytes
/ symbol_size
;
802 symbuf_left
-= nbytes
;
803 symbuf_read
+= nbytes
;
807 stabs_seek (int sym_offset
)
811 symbuf_read
+= sym_offset
;
812 symbuf_left
-= sym_offset
;
815 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
818 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
820 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
821 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
822 (intern).n_other = 0; \
823 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
824 if (bfd_get_sign_extend_vma (abfd)) \
825 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
827 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
830 /* Invariant: The symbol pointed to by symbuf_idx is the first one
831 that hasn't been swapped. Swap the symbol at the same time
832 that symbuf_idx is incremented. */
834 /* dbx allows the text of a symbol name to be continued into the
835 next symbol name! When such a continuation is encountered
836 (a \ at the end of the text of a name)
837 call this function to get the continuation. */
840 dbx_next_symbol_text (struct objfile
*objfile
)
842 struct internal_nlist nlist
;
844 if (symbuf_idx
== symbuf_end
)
845 fill_symbuf (symfile_bfd
);
848 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
849 OBJSTAT (objfile
, n_stabs
++);
853 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
857 /* Given a name, value pair, find the corresponding
858 bincl in the list. Return the partial symtab associated
859 with that header_file_location. */
861 static legacy_psymtab
*
862 find_corresponding_bincl_psymtab (const char *name
, int instance
)
864 for (const header_file_location
&bincl
: *bincl_list
)
865 if (bincl
.instance
== instance
866 && strcmp (name
, bincl
.name
) == 0)
869 repeated_header_complaint (name
, symnum
);
870 return (legacy_psymtab
*) 0;
873 /* Set namestring based on nlist. If the string table index is invalid,
874 give a fake name, and print a single error message per symbol file read,
875 rather than abort the symbol reading or flood the user with messages. */
878 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
880 const char *namestring
;
882 if (nlist
->n_strx
+ file_string_table_offset
883 >= DBX_STRINGTAB_SIZE (objfile
)
884 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
886 complaint (_("bad string table offset in symbol %d"),
888 namestring
= "<bad string table offset>";
891 namestring
= (nlist
->n_strx
+ file_string_table_offset
892 + DBX_STRINGTAB (objfile
));
896 static struct bound_minimal_symbol
897 find_stab_function (const char *namestring
, const char *filename
,
898 struct objfile
*objfile
)
900 struct bound_minimal_symbol msym
;
903 const char *colon
= strchr (namestring
, ':');
907 n
= colon
- namestring
;
909 char *p
= (char *) alloca (n
+ 2);
910 strncpy (p
, namestring
, n
);
913 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
914 if (msym
.minsym
== NULL
)
916 /* Sun Fortran appends an underscore to the minimal symbol name,
917 try again with an appended underscore if the minimal symbol
921 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
924 if (msym
.minsym
== NULL
&& filename
!= NULL
)
926 /* Try again without the filename. */
928 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
930 if (msym
.minsym
== NULL
&& filename
!= NULL
)
932 /* And try again for Sun Fortran, but without the filename. */
935 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
942 function_outside_compilation_unit_complaint (const char *arg1
)
944 complaint (_("function `%s' appears to be defined "
945 "outside of all compilation units"),
949 /* Setup partial_symtab's describing each source file for which
950 debugging information is available. */
953 read_dbx_symtab (minimal_symbol_reader
&reader
,
954 psymtab_storage
*partial_symtabs
,
955 struct objfile
*objfile
)
957 struct gdbarch
*gdbarch
= objfile
->arch ();
958 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
959 struct internal_nlist nlist
;
962 const char *sym_name
;
965 const char *namestring
;
967 int past_first_source_file
= 0;
968 CORE_ADDR last_function_start
= 0;
973 /* Current partial symtab. */
976 /* List of current psymtab's include files. */
977 const char **psymtab_include_list
;
978 int includes_allocated
;
981 /* Index within current psymtab dependency list. */
982 legacy_psymtab
**dependency_list
;
983 int dependencies_used
, dependencies_allocated
;
985 text_addr
= DBX_TEXT_ADDR (objfile
);
986 text_size
= DBX_TEXT_SIZE (objfile
);
988 /* FIXME. We probably want to change stringtab_global rather than add this
989 while processing every symbol entry. FIXME. */
990 file_string_table_offset
= 0;
991 next_file_string_table_offset
= 0;
993 stringtab_global
= DBX_STRINGTAB (objfile
);
995 pst
= (legacy_psymtab
*) 0;
997 includes_allocated
= 30;
999 psymtab_include_list
= (const char **) alloca (includes_allocated
*
1000 sizeof (const char *));
1002 dependencies_allocated
= 30;
1003 dependencies_used
= 0;
1005 (legacy_psymtab
**) alloca (dependencies_allocated
*
1006 sizeof (legacy_psymtab
*));
1008 /* Init bincl list */
1009 std::vector
<struct header_file_location
> bincl_storage
;
1010 scoped_restore restore_bincl_global
1011 = make_scoped_restore (&bincl_list
, &bincl_storage
);
1013 set_last_source_file (NULL
);
1015 lowest_text_address
= (CORE_ADDR
) -1;
1017 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1018 abfd
= objfile
->obfd
;
1019 symbuf_end
= symbuf_idx
= 0;
1020 next_symbol_text_func
= dbx_next_symbol_text
;
1021 textlow_not_set
= 1;
1022 has_line_numbers
= 0;
1024 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1025 to global and static variables. The stab for a global or static
1026 variable doesn't give us any indication of which section it's in,
1027 so we can't tell immediately which offset in
1028 objfile->section_offsets we should apply to the variable's
1031 We could certainly find out which section contains the variable
1032 by looking up the variable's unrelocated address with
1033 find_pc_section, but that would be expensive; this is the
1034 function that constructs the partial symbol tables by examining
1035 every symbol in the entire executable, and it's
1036 performance-critical. So that expense would not be welcome. I'm
1037 not sure what to do about this at the moment.
1039 What we have done for years is to simply assume that the .data
1040 section's offset is appropriate for all global and static
1041 variables. Recently, this was expanded to fall back to the .bss
1042 section's offset if there is no .data section, and then to the
1043 .rodata section's offset. */
1044 data_sect_index
= objfile
->sect_index_data
;
1045 if (data_sect_index
== -1)
1046 data_sect_index
= SECT_OFF_BSS (objfile
);
1047 if (data_sect_index
== -1)
1048 data_sect_index
= SECT_OFF_RODATA (objfile
);
1050 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1051 for the file to have no .data, no .bss, and no .text at all, if
1052 it also has no global or static variables. */
1054 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1056 /* Get the symbol for this run and pull out some info. */
1057 QUIT
; /* Allow this to be interruptable. */
1058 if (symbuf_idx
== symbuf_end
)
1060 bufp
= &symbuf
[symbuf_idx
++];
1063 * Special case to speed up readin.
1065 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1067 has_line_numbers
= 1;
1071 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1072 OBJSTAT (objfile
, n_stabs
++);
1074 /* Ok. There is a lot of code duplicated in the rest of this
1075 switch statement (for efficiency reasons). Since I don't
1076 like duplicating code, I will do my penance here, and
1077 describe the code which is duplicated:
1079 *) The assignment to namestring.
1080 *) The call to strchr.
1081 *) The addition of a partial symbol the two partial
1082 symbol lists. This last is a large section of code, so
1083 I've imbedded it in the following macro. */
1085 switch (nlist
.n_type
)
1088 * Standard, external, non-debugger, symbols
1091 case N_TEXT
| N_EXT
:
1092 case N_NBTEXT
| N_EXT
:
1095 case N_DATA
| N_EXT
:
1096 case N_NBDATA
| N_EXT
:
1101 case N_NBBSS
| N_EXT
:
1102 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1107 namestring
= set_namestring (objfile
, &nlist
);
1109 record_minimal_symbol (reader
, namestring
, nlist
.n_value
,
1110 nlist
.n_type
, objfile
); /* Always */
1113 /* Standard, local, non-debugger, symbols. */
1117 /* We need to be able to deal with both N_FN or N_TEXT,
1118 because we have no way of knowing whether the sys-supplied ld
1119 or GNU ld was used to make the executable. Sequents throw
1120 in another wrinkle -- they renumbered N_FN. */
1125 namestring
= set_namestring (objfile
, &nlist
);
1127 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1128 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1129 && namestring
[nsl
- 2] == '.'))
1131 if (past_first_source_file
&& pst
1132 /* The gould NP1 uses low values for .o and -l symbols
1133 which are not the address. */
1134 && nlist
.n_value
>= pst
->raw_text_low ())
1136 dbx_end_psymtab (objfile
, partial_symtabs
,
1137 pst
, psymtab_include_list
,
1138 includes_used
, symnum
* symbol_size
,
1139 nlist
.n_value
> pst
->raw_text_high ()
1140 ? nlist
.n_value
: pst
->raw_text_high (),
1141 dependency_list
, dependencies_used
,
1143 pst
= (legacy_psymtab
*) 0;
1145 dependencies_used
= 0;
1146 has_line_numbers
= 0;
1149 past_first_source_file
= 1;
1158 case N_UNDF
| N_EXT
:
1159 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1160 We used to rely on the target to tell us whether it knows
1161 where the symbol has been relocated to, but none of the
1162 target implementations actually provided that operation.
1163 So we just ignore the symbol, the same way we would do if
1164 we had a target-side symbol lookup which returned no match.
1166 All other symbols (with nlist.n_value == 0), are really
1167 undefined, and so we ignore them too. */
1171 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1173 /* Deal with relative offsets in the string table
1174 used in ELF+STAB under Solaris. If we want to use the
1175 n_strx field, which contains the name of the file,
1176 we must adjust file_string_table_offset *before* calling
1177 set_namestring(). */
1178 past_first_source_file
= 1;
1179 file_string_table_offset
= next_file_string_table_offset
;
1180 next_file_string_table_offset
=
1181 file_string_table_offset
+ nlist
.n_value
;
1182 if (next_file_string_table_offset
< file_string_table_offset
)
1183 error (_("string table offset backs up at %d"), symnum
);
1184 /* FIXME -- replace error() with complaint. */
1189 /* Lots of symbol types we can just ignore. */
1196 /* Keep going . . . */
1199 * Special symbol types for GNU
1202 case N_INDR
| N_EXT
:
1204 case N_SETA
| N_EXT
:
1206 case N_SETT
| N_EXT
:
1208 case N_SETD
| N_EXT
:
1210 case N_SETB
| N_EXT
:
1221 static int prev_so_symnum
= -10;
1222 static int first_so_symnum
;
1224 static const char *dirname_nso
;
1225 int prev_textlow_not_set
;
1227 valu
= nlist
.n_value
;
1229 prev_textlow_not_set
= textlow_not_set
;
1231 /* A zero value is probably an indication for the SunPRO 3.0
1232 compiler. dbx_end_psymtab explicitly tests for zero, so
1233 don't relocate it. */
1235 if (nlist
.n_value
== 0
1236 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1238 textlow_not_set
= 1;
1242 textlow_not_set
= 0;
1244 past_first_source_file
= 1;
1246 if (prev_so_symnum
!= symnum
- 1)
1247 { /* Here if prev stab wasn't N_SO. */
1248 first_so_symnum
= symnum
;
1252 dbx_end_psymtab (objfile
, partial_symtabs
,
1253 pst
, psymtab_include_list
,
1254 includes_used
, symnum
* symbol_size
,
1255 (valu
> pst
->raw_text_high ()
1256 ? valu
: pst
->raw_text_high ()),
1257 dependency_list
, dependencies_used
,
1258 prev_textlow_not_set
);
1259 pst
= (legacy_psymtab
*) 0;
1261 dependencies_used
= 0;
1262 has_line_numbers
= 0;
1266 prev_so_symnum
= symnum
;
1268 /* End the current partial symtab and start a new one. */
1270 namestring
= set_namestring (objfile
, &nlist
);
1272 /* Null name means end of .o file. Don't start a new one. */
1273 if (*namestring
== '\000')
1276 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1277 The first one is a directory name; the second the file name.
1278 If pst exists, is empty, and has a filename ending in '/',
1279 we assume the previous N_SO was a directory name. */
1281 p
= lbasename (namestring
);
1282 if (p
!= namestring
&& *p
== '\000')
1284 /* Save the directory name SOs locally, then save it into
1285 the psymtab when it's created below. */
1286 dirname_nso
= namestring
;
1290 /* Some other compilers (C++ ones in particular) emit useless
1291 SOs for non-existant .c files. We ignore all subsequent SOs
1292 that immediately follow the first. */
1296 pst
= start_psymtab (partial_symtabs
, objfile
,
1298 first_so_symnum
* symbol_size
);
1299 pst
->dirname
= dirname_nso
;
1307 enum language tmp_language
;
1309 /* Add this bincl to the bincl_list for future EXCLs. No
1310 need to save the string; it'll be around until
1311 read_dbx_symtab function returns. */
1313 namestring
= set_namestring (objfile
, &nlist
);
1314 tmp_language
= deduce_language_from_filename (namestring
);
1316 /* Only change the psymtab's language if we've learned
1317 something useful (eg. tmp_language is not language_unknown).
1318 In addition, to match what start_subfile does, never change
1320 if (tmp_language
!= language_unknown
1321 && (tmp_language
!= language_c
1322 || psymtab_language
!= language_cplus
))
1323 psymtab_language
= tmp_language
;
1327 /* FIXME: we should not get here without a PST to work on.
1328 Attempt to recover. */
1329 complaint (_("N_BINCL %s not in entries for "
1330 "any file, at symtab pos %d"),
1331 namestring
, symnum
);
1334 bincl_list
->emplace_back (namestring
, nlist
.n_value
, pst
);
1336 /* Mark down an include file in the current psymtab. */
1338 goto record_include_file
;
1343 enum language tmp_language
;
1345 /* Mark down an include file in the current psymtab. */
1346 namestring
= set_namestring (objfile
, &nlist
);
1347 tmp_language
= deduce_language_from_filename (namestring
);
1349 /* Only change the psymtab's language if we've learned
1350 something useful (eg. tmp_language is not language_unknown).
1351 In addition, to match what start_subfile does, never change
1353 if (tmp_language
!= language_unknown
1354 && (tmp_language
!= language_c
1355 || psymtab_language
!= language_cplus
))
1356 psymtab_language
= tmp_language
;
1358 /* In C++, one may expect the same filename to come round many
1359 times, when code is coming alternately from the main file
1360 and from inline functions in other files. So I check to see
1361 if this is a file we've seen before -- either the main
1362 source file, or a previously included file.
1364 This seems to be a lot of time to be spending on N_SOL, but
1365 things like "break c-exp.y:435" need to work (I
1366 suppose the psymtab_include_list could be hashed or put
1367 in a binary tree, if profiling shows this is a major hog). */
1368 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
1373 for (i
= 0; i
< includes_used
; i
++)
1374 if (filename_cmp (namestring
, psymtab_include_list
[i
]) == 0)
1383 record_include_file
:
1385 psymtab_include_list
[includes_used
++] = namestring
;
1386 if (includes_used
>= includes_allocated
)
1388 const char **orig
= psymtab_include_list
;
1390 psymtab_include_list
= (const char **)
1391 alloca ((includes_allocated
*= 2) * sizeof (const char *));
1392 memcpy (psymtab_include_list
, orig
,
1393 includes_used
* sizeof (const char *));
1397 case N_LSYM
: /* Typedef or automatic variable. */
1398 case N_STSYM
: /* Data seg var -- static. */
1399 case N_LCSYM
: /* BSS " */
1400 case N_ROSYM
: /* Read-only data seg var -- static. */
1401 case N_NBSTS
: /* Gould nobase. */
1402 case N_NBLCS
: /* symbols. */
1404 case N_GSYM
: /* Global (extern) variable; can be
1405 data or bss (sigh FIXME). */
1407 /* Following may probably be ignored; I'll leave them here
1408 for now (until I do Pascal and Modula 2 extensions). */
1410 case N_PC
: /* I may or may not need this; I
1412 case N_M2C
: /* I suspect that I can ignore this here. */
1413 case N_SCOPE
: /* Same. */
1417 namestring
= set_namestring (objfile
, &nlist
);
1419 /* See if this is an end of function stab. */
1420 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1424 /* It's value is the size (in bytes) of the function for
1425 function relative stabs, or the address of the function's
1426 end for old style stabs. */
1427 valu
= nlist
.n_value
+ last_function_start
;
1428 if (pst
->raw_text_high () == 0 || valu
> pst
->raw_text_high ())
1429 pst
->set_text_high (valu
);
1433 p
= (char *) strchr (namestring
, ':');
1435 continue; /* Not a debugging symbol. */
1438 sym_name
= NULL
; /* pacify "gcc -Werror" */
1439 if (psymtab_language
== language_cplus
)
1441 std::string
name (namestring
, p
- namestring
);
1442 gdb::unique_xmalloc_ptr
<char> new_name
1443 = cp_canonicalize_string (name
.c_str ());
1444 if (new_name
!= nullptr)
1446 sym_len
= strlen (new_name
.get ());
1447 sym_name
= obstack_strdup (&objfile
->objfile_obstack
,
1454 sym_name
= namestring
;
1455 sym_len
= p
- namestring
;
1458 /* Main processing section for debugging symbols which
1459 the initial read through the symbol tables needs to worry
1460 about. If we reach this point, the symbol which we are
1461 considering is definitely one we are interested in.
1462 p must also contain the (valid) index into the namestring
1463 which indicates the debugging type symbol. */
1468 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
), true,
1469 VAR_DOMAIN
, LOC_STATIC
,
1471 psymbol_placement::STATIC
,
1472 nlist
.n_value
, psymtab_language
,
1473 partial_symtabs
, objfile
);
1477 /* The addresses in these entries are reported to be
1478 wrong. See the code that reads 'G's for symtabs. */
1479 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
), true,
1480 VAR_DOMAIN
, LOC_STATIC
,
1482 psymbol_placement::GLOBAL
,
1483 nlist
.n_value
, psymtab_language
,
1484 partial_symtabs
, objfile
);
1488 /* When a 'T' entry is defining an anonymous enum, it
1489 may have a name which is the empty string, or a
1490 single space. Since they're not really defining a
1491 symbol, those shouldn't go in the partial symbol
1492 table. We do pick up the elements of such enums at
1493 'check_enum:', below. */
1494 if (p
>= namestring
+ 2
1495 || (p
== namestring
+ 1
1496 && namestring
[0] != ' '))
1498 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
),
1499 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
1500 psymbol_placement::STATIC
,
1501 0, psymtab_language
,
1502 partial_symtabs
, objfile
);
1505 /* Also a typedef with the same name. */
1506 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
),
1507 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
1508 psymbol_placement::STATIC
,
1509 0, psymtab_language
,
1510 partial_symtabs
, objfile
);
1517 if (p
!= namestring
) /* a name is there, not just :T... */
1519 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
),
1520 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
1521 psymbol_placement::STATIC
,
1522 0, psymtab_language
,
1523 partial_symtabs
, objfile
);
1526 /* If this is an enumerated type, we need to
1527 add all the enum constants to the partial symbol
1528 table. This does not cover enums without names, e.g.
1529 "enum {a, b} c;" in C, but fortunately those are
1530 rare. There is no way for GDB to find those from the
1531 enum type without spending too much time on it. Thus
1532 to solve this problem, the compiler needs to put out the
1533 enum in a nameless type. GCC2 does this. */
1535 /* We are looking for something of the form
1536 <name> ":" ("t" | "T") [<number> "="] "e"
1537 {<constant> ":" <value> ","} ";". */
1539 /* Skip over the colon and the 't' or 'T'. */
1541 /* This type may be given a number. Also, numbers can come
1542 in pairs like (0,26). Skip over it. */
1543 while ((*p
>= '0' && *p
<= '9')
1544 || *p
== '(' || *p
== ',' || *p
== ')'
1550 /* The aix4 compiler emits extra crud before the members. */
1553 /* Skip over the type (?). */
1557 /* Skip over the colon. */
1561 /* We have found an enumerated type. */
1562 /* According to comments in read_enum_type
1563 a comma could end it instead of a semicolon.
1564 I don't know where that happens.
1566 while (*p
&& *p
!= ';' && *p
!= ',')
1570 /* Check for and handle cretinous dbx symbol name
1572 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1573 p
= next_symbol_text (objfile
);
1575 /* Point to the character after the name
1576 of the enum constant. */
1577 for (q
= p
; *q
&& *q
!= ':'; q
++)
1579 /* Note that the value doesn't matter for
1580 enum constants in psymtabs, just in symtabs. */
1581 pst
->add_psymbol (gdb::string_view (p
, q
- p
), true,
1582 VAR_DOMAIN
, LOC_CONST
, -1,
1583 psymbol_placement::STATIC
, 0,
1585 partial_symtabs
, objfile
);
1586 /* Point past the name. */
1588 /* Skip over the value. */
1589 while (*p
&& *p
!= ',')
1591 /* Advance past the comma. */
1599 /* Constant, e.g. from "const" in Pascal. */
1600 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
), true,
1601 VAR_DOMAIN
, LOC_CONST
, -1,
1602 psymbol_placement::STATIC
, 0,
1604 partial_symtabs
, objfile
);
1610 int name_len
= p
- namestring
;
1611 char *name
= (char *) xmalloc (name_len
+ 1);
1613 memcpy (name
, namestring
, name_len
);
1614 name
[name_len
] = '\0';
1615 function_outside_compilation_unit_complaint (name
);
1618 /* Kludges for ELF/STABS with Sun ACC. */
1619 last_function_name
= namestring
;
1620 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1621 value for the bottom of the text seg in those cases. */
1622 if (nlist
.n_value
== 0
1623 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1625 struct bound_minimal_symbol minsym
1626 = find_stab_function (namestring
,
1627 pst
? pst
->filename
: NULL
,
1629 if (minsym
.minsym
!= NULL
)
1630 nlist
.n_value
= MSYMBOL_VALUE_RAW_ADDRESS (minsym
.minsym
);
1632 if (pst
&& textlow_not_set
1633 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1635 pst
->set_text_low (nlist
.n_value
);
1636 textlow_not_set
= 0;
1640 /* Keep track of the start of the last function so we
1641 can handle end of function symbols. */
1642 last_function_start
= nlist
.n_value
;
1644 /* In reordered executables this function may lie outside
1645 the bounds created by N_SO symbols. If that's the case
1646 use the address of this function as the low bound for
1647 the partial symbol table. */
1650 || (nlist
.n_value
< pst
->raw_text_low ()
1651 && (nlist
.n_value
!= 0))))
1653 pst
->set_text_low (nlist
.n_value
);
1654 textlow_not_set
= 0;
1656 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
), true,
1657 VAR_DOMAIN
, LOC_BLOCK
,
1658 SECT_OFF_TEXT (objfile
),
1659 psymbol_placement::STATIC
,
1660 nlist
.n_value
, psymtab_language
,
1661 partial_symtabs
, objfile
);
1664 /* Global functions were ignored here, but now they
1665 are put into the global psymtab like one would expect.
1666 They're also in the minimal symbol table. */
1670 int name_len
= p
- namestring
;
1671 char *name
= (char *) xmalloc (name_len
+ 1);
1673 memcpy (name
, namestring
, name_len
);
1674 name
[name_len
] = '\0';
1675 function_outside_compilation_unit_complaint (name
);
1678 /* Kludges for ELF/STABS with Sun ACC. */
1679 last_function_name
= namestring
;
1680 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1681 value for the bottom of the text seg in those cases. */
1682 if (nlist
.n_value
== 0
1683 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1685 struct bound_minimal_symbol minsym
1686 = find_stab_function (namestring
,
1687 pst
? pst
->filename
: NULL
,
1689 if (minsym
.minsym
!= NULL
)
1690 nlist
.n_value
= MSYMBOL_VALUE_RAW_ADDRESS (minsym
.minsym
);
1692 if (pst
&& textlow_not_set
1693 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1695 pst
->set_text_low (nlist
.n_value
);
1696 textlow_not_set
= 0;
1700 /* Keep track of the start of the last function so we
1701 can handle end of function symbols. */
1702 last_function_start
= nlist
.n_value
;
1704 /* In reordered executables this function may lie outside
1705 the bounds created by N_SO symbols. If that's the case
1706 use the address of this function as the low bound for
1707 the partial symbol table. */
1710 || (nlist
.n_value
< pst
->raw_text_low ()
1711 && (nlist
.n_value
!= 0))))
1713 pst
->set_text_low (nlist
.n_value
);
1714 textlow_not_set
= 0;
1716 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
), true,
1717 VAR_DOMAIN
, LOC_BLOCK
,
1718 SECT_OFF_TEXT (objfile
),
1719 psymbol_placement::GLOBAL
,
1720 nlist
.n_value
, psymtab_language
,
1721 partial_symtabs
, objfile
);
1724 /* Two things show up here (hopefully); static symbols of
1725 local scope (static used inside braces) or extensions
1726 of structure symbols. We can ignore both. */
1740 case '#': /* For symbol identification (used in live ranges). */
1744 /* It is a C++ nested symbol. We don't need to record it
1745 (I don't think); if we try to look up foo::bar::baz,
1746 then symbols for the symtab containing foo should get
1747 read in, I think. */
1748 /* Someone says sun cc puts out symbols like
1749 /foo/baz/maclib::/usr/local/bin/maclib,
1750 which would get here with a symbol type of ':'. */
1754 /* Unexpected symbol descriptor. The second and subsequent stabs
1755 of a continued stab can show up here. The question is
1756 whether they ever can mimic a normal stab--it would be
1757 nice if not, since we certainly don't want to spend the
1758 time searching to the end of every string looking for
1761 complaint (_("unknown symbol descriptor `%c'"),
1764 /* Ignore it; perhaps it is an extension that we don't
1772 namestring
= set_namestring (objfile
, &nlist
);
1774 /* Find the corresponding bincl and mark that psymtab on the
1775 psymtab dependency list. */
1777 legacy_psymtab
*needed_pst
=
1778 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
1780 /* If this include file was defined earlier in this file,
1782 if (needed_pst
== pst
)
1790 for (i
= 0; i
< dependencies_used
; i
++)
1791 if (dependency_list
[i
] == needed_pst
)
1797 /* If it's already in the list, skip the rest. */
1801 dependency_list
[dependencies_used
++] = needed_pst
;
1802 if (dependencies_used
>= dependencies_allocated
)
1804 legacy_psymtab
**orig
= dependency_list
;
1808 alloca ((dependencies_allocated
*= 2)
1809 * sizeof (legacy_psymtab
*));
1810 memcpy (dependency_list
, orig
,
1812 * sizeof (legacy_psymtab
*)));
1814 fprintf_unfiltered (gdb_stderr
,
1815 "Had to reallocate "
1816 "dependency list.\n");
1817 fprintf_unfiltered (gdb_stderr
,
1818 "New dependencies allocated: %d\n",
1819 dependencies_allocated
);
1827 /* Solaris 2 end of module, finish current partial symbol
1828 table. dbx_end_psymtab will set the high text address of
1829 PST to the proper value, which is necessary if a module
1830 compiled without debugging info follows this module. */
1831 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
1833 dbx_end_psymtab (objfile
, partial_symtabs
, pst
,
1834 psymtab_include_list
, includes_used
,
1835 symnum
* symbol_size
,
1836 (CORE_ADDR
) 0, dependency_list
,
1837 dependencies_used
, textlow_not_set
);
1838 pst
= (legacy_psymtab
*) 0;
1840 dependencies_used
= 0;
1841 has_line_numbers
= 0;
1847 HANDLE_RBRAC (nlist
.n_value
);
1853 case N_SSYM
: /* Claim: Structure or union element.
1854 Hopefully, I can ignore this. */
1855 case N_ENTRY
: /* Alternate entry point; can ignore. */
1856 case N_MAIN
: /* Can definitely ignore this. */
1857 case N_CATCH
: /* These are GNU C++ extensions */
1858 case N_EHDECL
: /* that can safely be ignored here. */
1870 case N_NSYMS
: /* Ultrix 4.0: symbol count */
1871 case N_DEFD
: /* GNU Modula-2 */
1872 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
1874 case N_OBJ
: /* Useless types from Solaris. */
1877 /* These symbols aren't interesting; don't worry about them. */
1881 /* If we haven't found it yet, ignore it. It's probably some
1882 new type we don't know about yet. */
1883 unknown_symtype_complaint (hex_string (nlist
.n_type
));
1888 /* If there's stuff to be cleaned up, clean it up. */
1891 /* Don't set high text address of PST lower than it already
1893 CORE_ADDR text_end
=
1894 (lowest_text_address
== (CORE_ADDR
) -1
1896 : lowest_text_address
)
1899 dbx_end_psymtab (objfile
, partial_symtabs
,
1900 pst
, psymtab_include_list
, includes_used
,
1901 symnum
* symbol_size
,
1902 (text_end
> pst
->raw_text_high ()
1903 ? text_end
: pst
->raw_text_high ()),
1904 dependency_list
, dependencies_used
, textlow_not_set
);
1908 /* Allocate and partially fill a partial symtab. It will be
1909 completely filled at the end of the symbol list.
1911 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1912 is the address relative to which its symbols are (incremental) or 0
1915 static legacy_psymtab
*
1916 start_psymtab (psymtab_storage
*partial_symtabs
, struct objfile
*objfile
,
1917 const char *filename
, CORE_ADDR textlow
, int ldsymoff
)
1919 legacy_psymtab
*result
= new legacy_psymtab (filename
, partial_symtabs
,
1920 objfile
->per_bfd
, textlow
);
1922 result
->read_symtab_private
=
1923 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
1924 LDSYMOFF (result
) = ldsymoff
;
1925 result
->legacy_read_symtab
= dbx_read_symtab
;
1926 result
->legacy_expand_psymtab
= dbx_expand_psymtab
;
1927 SYMBOL_SIZE (result
) = symbol_size
;
1928 SYMBOL_OFFSET (result
) = symbol_table_offset
;
1929 STRING_OFFSET (result
) = string_table_offset
;
1930 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
1932 /* Deduce the source language from the filename for this psymtab. */
1933 psymtab_language
= deduce_language_from_filename (filename
);
1934 PST_LANGUAGE (result
) = psymtab_language
;
1939 /* Close off the current usage of PST.
1940 Returns PST or NULL if the partial symtab was empty and thrown away.
1942 FIXME: List variables and peculiarities of same. */
1945 dbx_end_psymtab (struct objfile
*objfile
, psymtab_storage
*partial_symtabs
,
1946 legacy_psymtab
*pst
,
1947 const char **include_list
, int num_includes
,
1948 int capping_symbol_offset
, CORE_ADDR capping_text
,
1949 legacy_psymtab
**dependency_list
,
1950 int number_dependencies
,
1951 int textlow_not_set
)
1954 struct gdbarch
*gdbarch
= objfile
->arch ();
1956 if (capping_symbol_offset
!= -1)
1957 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
1958 pst
->set_text_high (capping_text
);
1960 /* Under Solaris, the N_SO symbols always have a value of 0,
1961 instead of the usual address of the .o file. Therefore,
1962 we have to do some tricks to fill in texthigh and textlow.
1963 The first trick is: if we see a static
1964 or global function, and the textlow for the current pst
1965 is not set (ie: textlow_not_set), then we use that function's
1966 address for the textlow of the pst. */
1968 /* Now, to fill in texthigh, we remember the last function seen
1969 in the .o file. Also, there's a hack in
1970 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1971 to here via the misc_info field. Therefore, we can fill in
1972 a reliable texthigh by taking the address plus size of the
1973 last function in the file. */
1975 if (!pst
->text_high_valid
&& last_function_name
1976 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1979 struct bound_minimal_symbol minsym
;
1981 const char *colon
= strchr (last_function_name
, ':');
1985 n
= colon
- last_function_name
;
1986 char *p
= (char *) alloca (n
+ 2);
1987 strncpy (p
, last_function_name
, n
);
1990 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
1991 if (minsym
.minsym
== NULL
)
1993 /* Sun Fortran appends an underscore to the minimal symbol name,
1994 try again with an appended underscore if the minimal symbol
1998 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2002 pst
->set_text_high (MSYMBOL_VALUE_RAW_ADDRESS (minsym
.minsym
)
2003 + MSYMBOL_SIZE (minsym
.minsym
));
2005 last_function_name
= NULL
;
2008 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2010 /* This test will be true if the last .o file is only data. */
2011 else if (textlow_not_set
)
2012 pst
->set_text_low (pst
->raw_text_high ());
2015 /* If we know our own starting text address, then walk through all other
2016 psymtabs for this objfile, and if any didn't know their ending text
2017 address, set it to our starting address. Take care to not set our
2018 own ending address to our starting address. */
2020 for (partial_symtab
*p1
: partial_symtabs
->range ())
2021 if (!p1
->text_high_valid
&& p1
->text_low_valid
&& p1
!= pst
)
2022 p1
->set_text_high (pst
->raw_text_low ());
2025 /* End of kludge for patching Solaris textlow and texthigh. */
2029 pst
->number_of_dependencies
= number_dependencies
;
2030 if (number_dependencies
)
2033 = partial_symtabs
->allocate_dependencies (number_dependencies
);
2034 memcpy (pst
->dependencies
, dependency_list
,
2035 number_dependencies
* sizeof (legacy_psymtab
*));
2038 pst
->dependencies
= 0;
2040 for (i
= 0; i
< num_includes
; i
++)
2042 legacy_psymtab
*subpst
=
2043 new legacy_psymtab (include_list
[i
], partial_symtabs
, objfile
->per_bfd
);
2045 subpst
->read_symtab_private
=
2046 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2048 LDSYMLEN (subpst
) = 0;
2050 /* We could save slight bits of space by only making one of these,
2051 shared by the entire set of include files. FIXME-someday. */
2052 subpst
->dependencies
=
2053 partial_symtabs
->allocate_dependencies (1);
2054 subpst
->dependencies
[0] = pst
;
2055 subpst
->number_of_dependencies
= 1;
2057 subpst
->legacy_read_symtab
= pst
->legacy_read_symtab
;
2058 subpst
->legacy_expand_psymtab
= pst
->legacy_expand_psymtab
;
2061 if (num_includes
== 0
2062 && number_dependencies
== 0
2064 && has_line_numbers
== 0)
2066 /* Throw away this psymtab, it's empty. */
2067 /* Empty psymtabs happen as a result of header files which don't have
2068 any symbols in them. There can be a lot of them. But this check
2069 is wrong, in that a psymtab with N_SLINE entries but nothing else
2070 is not empty, but we don't realize that. Fixing that without slowing
2071 things down might be tricky. */
2073 partial_symtabs
->discard_psymtab (pst
);
2075 /* Indicate that psymtab was thrown away. */
2082 dbx_expand_psymtab (legacy_psymtab
*pst
, struct objfile
*objfile
)
2084 gdb_assert (!pst
->readin
);
2086 /* Read in all partial symtabs on which this one is dependent. */
2087 pst
->expand_dependencies (objfile
);
2089 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2091 /* Init stuff necessary for reading in symbols */
2093 scoped_free_pendings free_pending
;
2094 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2095 symbol_size
= SYMBOL_SIZE (pst
);
2097 /* Read in this file's symbols. */
2098 bfd_seek (objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2099 read_ofile_symtab (objfile
, pst
);
2105 /* Read in all of the symbols for a given psymtab for real.
2106 Be verbose about it if the user wants that. SELF is not NULL. */
2109 dbx_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
2111 gdb_assert (!self
->readin
);
2113 if (LDSYMLEN (self
) || self
->number_of_dependencies
)
2115 next_symbol_text_func
= dbx_next_symbol_text
;
2118 scoped_restore restore_stabs_data
= make_scoped_restore (&stabs_data
);
2119 gdb::unique_xmalloc_ptr
<gdb_byte
> data_holder
;
2120 if (DBX_STAB_SECTION (objfile
))
2123 = symfile_relocate_debug_section (objfile
,
2124 DBX_STAB_SECTION (objfile
),
2126 data_holder
.reset (stabs_data
);
2129 self
->expand_psymtab (objfile
);
2132 /* Match with global symbols. This only needs to be done once,
2133 after all of the symtabs and dependencies have been read in. */
2134 scan_file_globals (objfile
);
2138 /* Read in a defined section of a specific object file's symbols. */
2141 read_ofile_symtab (struct objfile
*objfile
, legacy_psymtab
*pst
)
2143 const char *namestring
;
2144 struct external_nlist
*bufp
;
2145 struct internal_nlist nlist
;
2147 unsigned max_symnum
;
2149 int sym_offset
; /* Offset to start of symbols to read */
2150 int sym_size
; /* Size of symbols to read */
2151 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2152 int text_size
; /* Size of text segment for symbols */
2154 sym_offset
= LDSYMOFF (pst
);
2155 sym_size
= LDSYMLEN (pst
);
2156 text_offset
= pst
->text_low (objfile
);
2157 text_size
= pst
->text_high (objfile
) - pst
->text_low (objfile
);
2158 const section_offsets
§ion_offsets
= objfile
->section_offsets
;
2160 dbxread_objfile
= objfile
;
2162 stringtab_global
= DBX_STRINGTAB (objfile
);
2163 set_last_source_file (NULL
);
2165 abfd
= objfile
->obfd
;
2166 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2167 symbuf_end
= symbuf_idx
= 0;
2169 symbuf_left
= sym_offset
+ sym_size
;
2171 /* It is necessary to actually read one symbol *before* the start
2172 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2173 occurs before the N_SO symbol.
2175 Detecting this in read_dbx_symtab
2176 would slow down initial readin, so we look for it here instead. */
2177 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2179 stabs_seek (sym_offset
- symbol_size
);
2181 bufp
= &symbuf
[symbuf_idx
++];
2182 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2183 OBJSTAT (objfile
, n_stabs
++);
2185 namestring
= set_namestring (objfile
, &nlist
);
2187 processing_gcc_compilation
= 0;
2188 if (nlist
.n_type
== N_TEXT
)
2190 const char *tempstring
= namestring
;
2192 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2193 processing_gcc_compilation
= 1;
2194 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2195 processing_gcc_compilation
= 2;
2196 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2198 if (startswith (tempstring
, "__gnu_compiled"))
2199 processing_gcc_compilation
= 2;
2204 /* The N_SO starting this symtab is the first symbol, so we
2205 better not check the symbol before it. I'm not this can
2206 happen, but it doesn't hurt to check for it. */
2207 stabs_seek (sym_offset
);
2208 processing_gcc_compilation
= 0;
2211 if (symbuf_idx
== symbuf_end
)
2213 bufp
= &symbuf
[symbuf_idx
];
2214 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2215 error (_("First symbol in segment of executable not a source symbol"));
2217 max_symnum
= sym_size
/ symbol_size
;
2220 symnum
< max_symnum
;
2223 QUIT
; /* Allow this to be interruptable. */
2224 if (symbuf_idx
== symbuf_end
)
2226 bufp
= &symbuf
[symbuf_idx
++];
2227 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2228 OBJSTAT (objfile
, n_stabs
++);
2230 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2232 namestring
= set_namestring (objfile
, &nlist
);
2236 if (sizeof (nlist
.n_value
) > 4
2237 /* We are a 64-bit debugger debugging a 32-bit program. */
2238 && (type
== N_LSYM
|| type
== N_PSYM
))
2239 /* We have to be careful with the n_value in the case of N_LSYM
2240 and N_PSYM entries, because they are signed offsets from frame
2241 pointer, but we actually read them as unsigned 32-bit values.
2242 This is not a problem for 32-bit debuggers, for which negative
2243 values end up being interpreted correctly (as negative
2244 offsets) due to integer overflow.
2245 But we need to sign-extend the value for 64-bit debuggers,
2246 or we'll end up interpreting negative values as very large
2247 positive offsets. */
2248 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2249 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2250 namestring
, section_offsets
, objfile
,
2251 PST_LANGUAGE (pst
));
2253 /* We skip checking for a new .o or -l file; that should never
2254 happen in this routine. */
2255 else if (type
== N_TEXT
)
2257 /* I don't think this code will ever be executed, because
2258 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2259 the N_SO symbol which starts this source file.
2260 However, there is no reason not to accept
2261 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2263 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2264 processing_gcc_compilation
= 1;
2265 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2266 processing_gcc_compilation
= 2;
2268 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2269 || type
== (unsigned char) N_NBTEXT
)
2271 /* Global symbol: see if we came across a dbx definition for
2272 a corresponding symbol. If so, store the value. Remove
2273 syms from the chain when their values are stored, but
2274 search the whole chain, as there may be several syms from
2275 different files with the same name. */
2276 /* This is probably not true. Since the files will be read
2277 in one at a time, each reference to a global symbol will
2278 be satisfied in each file as it appears. So we skip this
2284 /* In a Solaris elf file, this variable, which comes from the value
2285 of the N_SO symbol, will still be 0. Luckily, text_offset, which
2286 comes from low text address of PST, is correct. */
2287 if (get_last_source_start_addr () == 0)
2288 set_last_source_start_addr (text_offset
);
2290 /* In reordered executables last_source_start_addr may not be the
2291 lower bound for this symtab, instead use text_offset which comes
2292 from the low text address of PST, which is correct. */
2293 if (get_last_source_start_addr () > text_offset
)
2294 set_last_source_start_addr (text_offset
);
2296 pst
->compunit_symtab
= end_symtab (text_offset
+ text_size
,
2297 SECT_OFF_TEXT (objfile
));
2301 dbxread_objfile
= NULL
;
2305 /* Record the namespace that the function defined by SYMBOL was
2306 defined in, if necessary. BLOCK is the associated block; use
2307 OBSTACK for allocation. */
2310 cp_set_block_scope (const struct symbol
*symbol
,
2311 struct block
*block
,
2312 struct obstack
*obstack
)
2314 if (symbol
->demangled_name () != NULL
)
2316 /* Try to figure out the appropriate namespace from the
2319 /* FIXME: carlton/2003-04-15: If the function in question is
2320 a method of a class, the name will actually include the
2321 name of the class as well. This should be harmless, but
2322 is a little unfortunate. */
2324 const char *name
= symbol
->demangled_name ();
2325 unsigned int prefix_len
= cp_entire_prefix_len (name
);
2327 block_set_scope (block
, obstack_strndup (obstack
, name
, prefix_len
),
2332 /* This handles a single symbol from the symbol-file, building symbols
2333 into a GDB symtab. It takes these arguments and an implicit argument.
2335 TYPE is the type field of the ".stab" symbol entry.
2336 DESC is the desc field of the ".stab" entry.
2337 VALU is the value field of the ".stab" entry.
2338 NAME is the symbol name, in our address space.
2339 SECTION_OFFSETS is a set of amounts by which the sections of this
2340 object file were relocated when it was loaded into memory. Note
2341 that these section_offsets are not the objfile->section_offsets but
2342 the pst->section_offsets. All symbols that refer to memory
2343 locations need to be offset by these amounts.
2344 OBJFILE is the object file from which we are reading symbols. It
2345 is used in end_symtab.
2346 LANGUAGE is the language of the symtab.
2350 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, const char *name
,
2351 const section_offsets
§ion_offsets
,
2352 struct objfile
*objfile
, enum language language
)
2354 struct gdbarch
*gdbarch
= objfile
->arch ();
2355 struct context_stack
*newobj
;
2356 struct context_stack cstk
;
2357 /* This remembers the address of the start of a function. It is
2358 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2359 are relative to the current function's start address. On systems
2360 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2361 and is used to relocate these symbol types rather than
2363 static CORE_ADDR function_start_offset
;
2365 /* This holds the address of the start of a function, without the
2366 system peculiarities of function_start_offset. */
2367 static CORE_ADDR last_function_start
;
2369 /* If this is nonzero, we've seen an N_SLINE since the start of the
2370 current function. We use this to tell us to move the first sline
2371 to the beginning of the function regardless of what its given
2373 static int sline_found_in_function
= 1;
2375 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2376 source file. Used to detect the SunPRO solaris compiler. */
2377 static int n_opt_found
;
2379 /* Something is wrong if we see real data before seeing a source
2382 if (get_last_source_file () == NULL
&& type
!= (unsigned char) N_SO
)
2384 /* Ignore any symbols which appear before an N_SO symbol.
2385 Currently no one puts symbols there, but we should deal
2386 gracefully with the case. A complain()t might be in order,
2387 but this should not be an error (). */
2396 if (*name
== '\000')
2398 /* This N_FUN marks the end of a function. This closes off
2399 the current block. */
2400 struct block
*block
;
2402 if (outermost_context_p ())
2404 lbrac_mismatch_complaint (symnum
);
2408 /* The following check is added before recording line 0 at
2409 end of function so as to handle hand-generated stabs
2410 which may have an N_FUN stabs at the end of the function,
2411 but no N_SLINE stabs. */
2412 if (sline_found_in_function
)
2414 CORE_ADDR addr
= last_function_start
+ valu
;
2416 record_line (get_current_subfile (), 0,
2417 gdbarch_addr_bits_remove (gdbarch
, addr
));
2420 within_function
= 0;
2421 cstk
= pop_context ();
2423 /* Make a block for the local symbols within. */
2424 block
= finish_block (cstk
.name
,
2425 cstk
.old_blocks
, NULL
,
2426 cstk
.start_addr
, cstk
.start_addr
+ valu
);
2428 /* For C++, set the block's scope. */
2429 if (cstk
.name
->language () == language_cplus
)
2430 cp_set_block_scope (cstk
.name
, block
, &objfile
->objfile_obstack
);
2432 /* May be switching to an assembler file which may not be using
2433 block relative stabs, so reset the offset. */
2434 function_start_offset
= 0;
2439 sline_found_in_function
= 0;
2441 /* Relocate for dynamic loading. */
2442 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2443 valu
= gdbarch_addr_bits_remove (gdbarch
, valu
);
2444 last_function_start
= valu
;
2446 goto define_a_symbol
;
2449 /* This "symbol" just indicates the start of an inner lexical
2450 context within a function. */
2452 /* Ignore extra outermost context from SunPRO cc and acc. */
2453 if (n_opt_found
&& desc
== 1)
2456 valu
+= function_start_offset
;
2458 push_context (desc
, valu
);
2462 /* This "symbol" just indicates the end of an inner lexical
2463 context that was started with N_LBRAC. */
2465 /* Ignore extra outermost context from SunPRO cc and acc. */
2466 if (n_opt_found
&& desc
== 1)
2469 valu
+= function_start_offset
;
2471 if (outermost_context_p ())
2473 lbrac_mismatch_complaint (symnum
);
2477 cstk
= pop_context ();
2478 if (desc
!= cstk
.depth
)
2479 lbrac_mismatch_complaint (symnum
);
2481 if (*get_local_symbols () != NULL
)
2483 /* GCC development snapshots from March to December of
2484 2000 would output N_LSYM entries after N_LBRAC
2485 entries. As a consequence, these symbols are simply
2486 discarded. Complain if this is the case. */
2487 complaint (_("misplaced N_LBRAC entry; discarding local "
2488 "symbols which have no enclosing block"));
2490 *get_local_symbols () = cstk
.locals
;
2492 if (get_context_stack_depth () > 1)
2494 /* This is not the outermost LBRAC...RBRAC pair in the
2495 function, its local symbols preceded it, and are the ones
2496 just recovered from the context stack. Define the block
2497 for them (but don't bother if the block contains no
2498 symbols. Should we complain on blocks without symbols?
2499 I can't think of any useful purpose for them). */
2500 if (*get_local_symbols () != NULL
)
2502 /* Muzzle a compiler bug that makes end < start.
2504 ??? Which compilers? Is this ever harmful?. */
2505 if (cstk
.start_addr
> valu
)
2507 complaint (_("block start larger than block end"));
2508 cstk
.start_addr
= valu
;
2510 /* Make a block for the local symbols within. */
2511 finish_block (0, cstk
.old_blocks
, NULL
,
2512 cstk
.start_addr
, valu
);
2517 /* This is the outermost LBRAC...RBRAC pair. There is no
2518 need to do anything; leave the symbols that preceded it
2519 to be attached to the function's own block. We need to
2520 indicate that we just moved outside of the function. */
2521 within_function
= 0;
2528 /* This kind of symbol indicates the start of an object file.
2529 Relocate for dynamic loading. */
2530 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2534 /* This type of symbol indicates the start of data for one
2535 source file. Finish the symbol table of the previous source
2536 file (if any) and start accumulating a new symbol table.
2537 Relocate for dynamic loading. */
2538 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2542 if (get_last_source_file ())
2544 /* Check if previous symbol was also an N_SO (with some
2545 sanity checks). If so, that one was actually the
2546 directory name, and the current one is the real file
2547 name. Patch things up. */
2548 if (previous_stab_code
== (unsigned char) N_SO
)
2550 patch_subfile_names (get_current_subfile (), name
);
2551 break; /* Ignore repeated SOs. */
2553 end_symtab (valu
, SECT_OFF_TEXT (objfile
));
2557 /* Null name means this just marks the end of text for this .o
2558 file. Don't start a new symtab in this case. */
2559 if (*name
== '\000')
2562 function_start_offset
= 0;
2565 start_symtab (objfile
, name
, NULL
, valu
, language
);
2566 record_debugformat ("stabs");
2570 /* This type of symbol indicates the start of data for a
2571 sub-source-file, one whose contents were copied or included
2572 in the compilation of the main source file (whose name was
2573 given in the N_SO symbol). Relocate for dynamic loading. */
2574 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2575 start_subfile (name
);
2580 add_new_header_file (name
, valu
);
2581 start_subfile (name
);
2585 start_subfile (pop_subfile ());
2589 add_old_header_file (name
, valu
);
2593 /* This type of "symbol" really just records one line-number --
2594 core-address correspondence. Enter it in the line list for
2595 this symbol table. */
2597 /* Relocate for dynamic loading and for ELF acc
2598 function-relative symbols. */
2599 valu
+= function_start_offset
;
2601 /* GCC 2.95.3 emits the first N_SLINE stab somewhere in the
2602 middle of the prologue instead of right at the start of the
2603 function. To deal with this we record the address for the
2604 first N_SLINE stab to be the start of the function instead of
2605 the listed location. We really shouldn't to this. When
2606 compiling with optimization, this first N_SLINE stab might be
2607 optimized away. Other (non-GCC) compilers don't emit this
2608 stab at all. There is no real harm in having an extra
2609 numbered line, although it can be a bit annoying for the
2610 user. However, it totally screws up our testsuite.
2612 So for now, keep adjusting the address of the first N_SLINE
2613 stab, but only for code compiled with GCC. */
2615 if (within_function
&& sline_found_in_function
== 0)
2617 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
2618 last_function_start
: valu
;
2620 record_line (get_current_subfile (), desc
,
2621 gdbarch_addr_bits_remove (gdbarch
, addr
));
2622 sline_found_in_function
= 1;
2625 record_line (get_current_subfile (), desc
,
2626 gdbarch_addr_bits_remove (gdbarch
, valu
));
2630 common_block_start (name
, objfile
);
2634 common_block_end (objfile
);
2637 /* The following symbol types need to have the appropriate
2638 offset added to their value; then we process symbol
2639 definitions in the name. */
2641 case N_STSYM
: /* Static symbol in data segment. */
2642 case N_LCSYM
: /* Static symbol in BSS segment. */
2643 case N_ROSYM
: /* Static symbol in read-only data segment. */
2644 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2645 Solaris 2's stabs-in-elf makes *most* symbols relative but
2646 leaves a few absolute (at least for Solaris 2.1 and version
2647 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
2648 the fence. .stab "foo:S...",N_STSYM is absolute (ld
2649 relocates it) .stab "foo:V...",N_STSYM is relative (section
2650 base subtracted). This leaves us no choice but to search for
2651 the 'S' or 'V'... (or pass the whole section_offsets stuff
2652 down ONE MORE function call level, which we really don't want
2657 /* Normal object file and NLMs have non-zero text seg offsets,
2658 but don't need their static syms offset in this fashion.
2659 XXX - This is really a crock that should be fixed in the
2660 solib handling code so that I don't have to work around it
2663 if (!symfile_relocatable
)
2665 p
= strchr (name
, ':');
2666 if (p
!= 0 && p
[1] == 'S')
2668 /* The linker relocated it. We don't want to add a
2669 Sun-stabs Tfoo.foo-like offset, but we *do*
2670 want to add whatever solib.c passed to
2671 symbol_file_add as addr (this is known to affect
2672 SunOS 4, and I suspect ELF too). Since there is no
2673 Ttext.text symbol, we can get addr from the text offset. */
2674 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2675 goto define_a_symbol
;
2678 /* Since it's not the kludge case, re-dispatch to the right
2689 internal_error (__FILE__
, __LINE__
,
2690 _("failed internal consistency check"));
2694 case_N_STSYM
: /* Static symbol in data segment. */
2695 case N_DSLINE
: /* Source line number, data segment. */
2696 valu
+= section_offsets
[SECT_OFF_DATA (objfile
)];
2697 goto define_a_symbol
;
2699 case_N_LCSYM
: /* Static symbol in BSS segment. */
2700 case N_BSLINE
: /* Source line number, BSS segment. */
2701 /* N_BROWS: overlaps with N_BSLINE. */
2702 valu
+= section_offsets
[SECT_OFF_BSS (objfile
)];
2703 goto define_a_symbol
;
2705 case_N_ROSYM
: /* Static symbol in read-only data segment. */
2706 valu
+= section_offsets
[SECT_OFF_RODATA (objfile
)];
2707 goto define_a_symbol
;
2709 case N_ENTRY
: /* Alternate entry point. */
2710 /* Relocate for dynamic loading. */
2711 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2712 goto define_a_symbol
;
2714 /* The following symbol types we don't know how to process.
2715 Handle them in a "default" way, but complain to people who
2718 case N_CATCH
: /* Exception handler catcher. */
2719 case N_EHDECL
: /* Exception handler name. */
2720 case N_PC
: /* Global symbol in Pascal. */
2721 case N_M2C
: /* Modula-2 compilation unit. */
2722 /* N_MOD2: overlaps with N_EHDECL. */
2723 case N_SCOPE
: /* Modula-2 scope information. */
2724 case N_ECOML
: /* End common (local name). */
2725 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
2730 unknown_symtype_complaint (hex_string (type
));
2734 /* These symbol types don't need the address field relocated,
2735 since it is either unused, or is absolute. */
2736 case N_GSYM
: /* Global variable. */
2737 case N_NSYMS
: /* Number of symbols (Ultrix). */
2738 case N_NOMAP
: /* No map? (Ultrix). */
2739 case N_RSYM
: /* Register variable. */
2740 case N_DEFD
: /* Modula-2 GNU module dependency. */
2741 case N_SSYM
: /* Struct or union element. */
2742 case N_LSYM
: /* Local symbol in stack. */
2743 case N_PSYM
: /* Parameter variable. */
2744 case N_LENG
: /* Length of preceding symbol type. */
2748 const char *colon_pos
= strchr (name
, ':');
2750 if (colon_pos
== NULL
)
2753 deftype
= colon_pos
[1];
2759 /* Deal with the SunPRO 3.0 compiler which omits the
2760 address from N_FUN symbols. */
2762 && valu
== section_offsets
[SECT_OFF_TEXT (objfile
)]
2763 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2765 struct bound_minimal_symbol minsym
2766 = find_stab_function (name
, get_last_source_file (),
2768 if (minsym
.minsym
!= NULL
)
2769 valu
= BMSYMBOL_VALUE_ADDRESS (minsym
);
2772 /* These addresses are absolute. */
2773 function_start_offset
= valu
;
2775 within_function
= 1;
2777 if (get_context_stack_depth () > 1)
2779 complaint (_("unmatched N_LBRAC before symtab pos %d"),
2784 if (!outermost_context_p ())
2786 struct block
*block
;
2788 cstk
= pop_context ();
2789 /* Make a block for the local symbols within. */
2790 block
= finish_block (cstk
.name
,
2791 cstk
.old_blocks
, NULL
,
2792 cstk
.start_addr
, valu
);
2794 /* For C++, set the block's scope. */
2795 if (cstk
.name
->language () == language_cplus
)
2796 cp_set_block_scope (cstk
.name
, block
,
2797 &objfile
->objfile_obstack
);
2800 newobj
= push_context (0, valu
);
2801 newobj
->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
2805 define_symbol (valu
, name
, desc
, type
, objfile
);
2811 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2812 for a bunch of other flags, too. Someday we may parse their
2813 flags; for now we ignore theirs and hope they'll ignore ours. */
2814 case N_OPT
: /* Solaris 2: Compiler options. */
2817 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2819 processing_gcc_compilation
= 2;
2826 case N_MAIN
: /* Name of main routine. */
2827 /* FIXME: If one has a symbol file with N_MAIN and then replaces
2828 it with a symbol file with "main" and without N_MAIN. I'm
2829 not sure exactly what rule to follow but probably something
2830 like: N_MAIN takes precedence over "main" no matter what
2831 objfile it is in; If there is more than one N_MAIN, choose
2832 the one in the symfile_objfile; If there is more than one
2833 N_MAIN within a given objfile, complain() and choose
2834 arbitrarily. (kingdon) */
2836 set_objfile_main_name (objfile
, name
, language_unknown
);
2839 /* The following symbol types can be ignored. */
2840 case N_OBJ
: /* Solaris 2: Object file dir and name. */
2841 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
2842 /* N_UNDF: Solaris 2: File separator mark. */
2843 /* N_UNDF: -- we will never encounter it, since we only process
2844 one file's symbols at once. */
2845 case N_ENDM
: /* Solaris 2: End of module. */
2846 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2850 /* '#' is a GNU C extension to allow one symbol to refer to another
2853 Generally this is used so that an alias can refer to its main
2858 /* Initialize symbol reference names and determine if this is a
2859 definition. If a symbol reference is being defined, go ahead
2860 and add it. Otherwise, just return. */
2862 const char *s
= name
;
2865 /* If this stab defines a new reference ID that is not on the
2866 reference list, then put it on the reference list.
2868 We go ahead and advance NAME past the reference, even though
2869 it is not strictly necessary at this time. */
2870 refnum
= symbol_reference_defined (&s
);
2872 if (!ref_search (refnum
))
2873 ref_add (refnum
, 0, name
, valu
);
2877 previous_stab_code
= type
;
2880 /* FIXME: The only difference between this and elfstab_build_psymtabs
2881 is the call to install_minimal_symbols for elf, and the support for
2882 split sections. If the differences are really that small, the code
2883 should be shared. */
2885 /* Scan and build partial symbols for an coff symbol file.
2886 The coff file has already been processed to get its minimal symbols.
2888 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2891 OBJFILE is the object file we are reading symbols from.
2892 ADDR is the address relative to which the symbols are (e.g.
2893 the base address of the text segment).
2894 TEXTADDR is the address of the text section.
2895 TEXTSIZE is the size of the text section.
2896 STABSECTS is the list of .stab sections in OBJFILE.
2897 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2898 .stabstr section exists.
2900 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2901 adjusted for coff details. */
2904 coffstab_build_psymtabs (struct objfile
*objfile
,
2905 CORE_ADDR textaddr
, unsigned int textsize
,
2906 const std::vector
<asection
*> &stabsects
,
2907 file_ptr stabstroffset
, unsigned int stabstrsize
)
2910 bfd
*sym_bfd
= objfile
->obfd
;
2911 const char *name
= bfd_get_filename (sym_bfd
);
2912 unsigned int stabsize
;
2914 /* Allocate struct to keep track of stab reading. */
2915 dbx_objfile_data_key
.emplace (objfile
);
2917 DBX_TEXT_ADDR (objfile
) = textaddr
;
2918 DBX_TEXT_SIZE (objfile
) = textsize
;
2920 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2921 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
2922 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2924 if (stabstrsize
> bfd_get_size (sym_bfd
))
2925 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
2926 DBX_STRINGTAB (objfile
) = (char *)
2927 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
2928 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
2930 /* Now read in the string table in one big gulp. */
2932 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2934 perror_with_name (name
);
2935 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
2936 if (val
!= stabstrsize
)
2937 perror_with_name (name
);
2939 stabsread_new_init ();
2940 free_header_files ();
2941 init_header_files ();
2943 processing_acc_compilation
= 1;
2945 /* In a coff file, we've already installed the minimal symbols that came
2946 from the coff (non-stab) symbol table, so always act like an
2947 incremental load here. */
2948 scoped_restore save_symbuf_sections
2949 = make_scoped_restore (&symbuf_sections
);
2950 if (stabsects
.size () == 1)
2952 stabsize
= bfd_section_size (stabsects
[0]);
2953 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2954 DBX_SYMTAB_OFFSET (objfile
) = stabsects
[0]->filepos
;
2958 DBX_SYMCOUNT (objfile
) = 0;
2959 for (asection
*section
: stabsects
)
2961 stabsize
= bfd_section_size (section
);
2962 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2965 DBX_SYMTAB_OFFSET (objfile
) = stabsects
[0]->filepos
;
2968 symbuf_sections
= &stabsects
;
2969 symbuf_left
= bfd_section_size (stabsects
[0]);
2973 dbx_symfile_read (objfile
, 0);
2976 /* Scan and build partial symbols for an ELF symbol file.
2977 This ELF file has already been processed to get its minimal symbols.
2979 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2982 OBJFILE is the object file we are reading symbols from.
2983 ADDR is the address relative to which the symbols are (e.g.
2984 the base address of the text segment).
2985 STABSECT is the BFD section information for the .stab section.
2986 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2987 .stabstr section exists.
2989 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2990 adjusted for elf details. */
2993 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
2994 file_ptr stabstroffset
, unsigned int stabstrsize
)
2997 bfd
*sym_bfd
= objfile
->obfd
;
2998 const char *name
= bfd_get_filename (sym_bfd
);
3000 stabsread_new_init ();
3002 /* Allocate struct to keep track of stab reading. */
3003 dbx_objfile_data_key
.emplace (objfile
);
3005 /* Find the first and last text address. dbx_symfile_read seems to
3007 find_text_range (sym_bfd
, objfile
);
3009 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3010 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3011 DBX_SYMCOUNT (objfile
)
3012 = bfd_section_size (stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3013 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3014 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3015 DBX_STAB_SECTION (objfile
) = stabsect
;
3017 if (stabstrsize
> bfd_get_size (sym_bfd
))
3018 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3019 DBX_STRINGTAB (objfile
) = (char *)
3020 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3021 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3023 /* Now read in the string table in one big gulp. */
3025 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3027 perror_with_name (name
);
3028 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3029 if (val
!= stabstrsize
)
3030 perror_with_name (name
);
3032 stabsread_new_init ();
3033 free_header_files ();
3034 init_header_files ();
3036 processing_acc_compilation
= 1;
3039 symbuf_left
= bfd_section_size (stabsect
);
3041 scoped_restore restore_stabs_data
= make_scoped_restore (&stabs_data
);
3042 gdb::unique_xmalloc_ptr
<gdb_byte
> data_holder
;
3044 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3046 data_holder
.reset (stabs_data
);
3048 /* In an elf file, we've already installed the minimal symbols that came
3049 from the elf (non-stab) symbol table, so always act like an
3050 incremental load here. dbx_symfile_read should not generate any new
3051 minimal symbols, since we will have already read the ELF dynamic symbol
3052 table and normal symbol entries won't be in the ".stab" section; but in
3053 case it does, it will install them itself. */
3054 dbx_symfile_read (objfile
, 0);
3057 /* Scan and build partial symbols for a file with special sections for stabs
3058 and stabstrings. The file has already been processed to get its minimal
3059 symbols, and any other symbols that might be necessary to resolve GSYMs.
3061 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3064 OBJFILE is the object file we are reading symbols from.
3065 ADDR is the address relative to which the symbols are (e.g. the base address
3066 of the text segment).
3067 STAB_NAME is the name of the section that contains the stabs.
3068 STABSTR_NAME is the name of the section that contains the stab strings.
3070 This routine is mostly copied from dbx_symfile_init and
3071 dbx_symfile_read. */
3074 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3075 char *stabstr_name
, char *text_name
)
3078 bfd
*sym_bfd
= objfile
->obfd
;
3079 const char *name
= bfd_get_filename (sym_bfd
);
3081 asection
*stabstrsect
;
3082 asection
*text_sect
;
3084 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3085 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3091 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3092 "but not string section (%s)"),
3093 stab_name
, stabstr_name
);
3095 dbx_objfile_data_key
.emplace (objfile
);
3097 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3099 error (_("Can't find %s section in symbol file"), text_name
);
3100 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (text_sect
);
3101 DBX_TEXT_SIZE (objfile
) = bfd_section_size (text_sect
);
3103 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3104 DBX_SYMCOUNT (objfile
) = bfd_section_size (stabsect
)
3105 / DBX_SYMBOL_SIZE (objfile
);
3106 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (stabstrsect
);
3107 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING
3111 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3112 error (_("ridiculous string table size: %d bytes"),
3113 DBX_STRINGTAB_SIZE (objfile
));
3114 DBX_STRINGTAB (objfile
) = (char *)
3115 obstack_alloc (&objfile
->objfile_obstack
,
3116 DBX_STRINGTAB_SIZE (objfile
) + 1);
3117 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3119 /* Now read in the string table in one big gulp. */
3121 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3122 stabstrsect
, /* bfd section */
3123 DBX_STRINGTAB (objfile
), /* input buffer */
3124 0, /* offset into section */
3125 DBX_STRINGTAB_SIZE (objfile
)); /* amount to
3129 perror_with_name (name
);
3131 stabsread_new_init ();
3132 free_header_files ();
3133 init_header_files ();
3135 /* Now, do an incremental load. */
3137 processing_acc_compilation
= 1;
3138 dbx_symfile_read (objfile
, 0);
3141 static const struct sym_fns aout_sym_fns
=
3143 dbx_new_init
, /* init anything gbl to entire symtab */
3144 dbx_symfile_init
, /* read initial info, setup for sym_read() */
3145 dbx_symfile_read
, /* read a symbol file into symtab */
3146 dbx_symfile_finish
, /* finished with file, cleanup */
3147 default_symfile_offsets
, /* parse user's offsets to internal form */
3148 default_symfile_segments
, /* Get segment information from a file. */
3150 default_symfile_relocate
, /* Relocate a debug section. */
3151 NULL
, /* sym_probe_fns */
3154 void _initialize_dbxread ();
3156 _initialize_dbxread ()
3158 add_symtab_fns (bfd_target_aout_flavour
, &aout_sym_fns
);