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 psymtab_storage
*partial_symtabs
= objfile
->partial_symtabs
.get ();
549 read_dbx_symtab (reader
, partial_symtabs
, objfile
);
551 /* Install any minimal symbols that have been collected as the current
552 minimal symbols for this objfile. */
557 /* Initialize anything that needs initializing when a completely new
558 symbol file is specified (not just adding some symbols from another
559 file, e.g. a shared library). */
562 dbx_new_init (struct objfile
*ignore
)
564 stabsread_new_init ();
565 init_header_files ();
569 /* dbx_symfile_init ()
570 is the dbx-specific initialization routine for reading symbols.
571 It is passed a struct objfile which contains, among other things,
572 the BFD for the file whose symbols are being read, and a slot for a pointer
573 to "private data" which we fill with goodies.
575 We read the string table into malloc'd space and stash a pointer to it.
577 Since BFD doesn't know how to read debug symbols in a format-independent
578 way (and may never do so...), we have to do it ourselves. We will never
579 be called unless this is an a.out (or very similar) file.
580 FIXME, there should be a cleaner peephole into the BFD environment here. */
582 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
585 dbx_symfile_init (struct objfile
*objfile
)
588 bfd
*sym_bfd
= objfile
->obfd
;
589 const char *name
= bfd_get_filename (sym_bfd
);
591 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
593 /* Allocate struct to keep track of the symfile. */
594 dbx_objfile_data_key
.emplace (objfile
);
596 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
597 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
598 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
600 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
601 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
602 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
604 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
606 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
608 error (_("Can't find .text section in symbol file"));
609 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (text_sect
);
610 DBX_TEXT_SIZE (objfile
) = bfd_section_size (text_sect
);
612 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
613 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
614 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
616 /* Read the string table and stash it away in the objfile_obstack.
617 When we blow away the objfile the string table goes away as well.
618 Note that gdb used to use the results of attempting to malloc the
619 string table, based on the size it read, as a form of sanity check
620 for botched byte swapping, on the theory that a byte swapped string
621 table size would be so totally bogus that the malloc would fail. Now
622 that we put in on the objfile_obstack, we can't do this since gdb gets
623 a fatal error (out of virtual memory) if the size is bogus. We can
624 however at least check to see if the size is less than the size of
625 the size field itself, or larger than the size of the entire file.
626 Note that all valid string tables have a size greater than zero, since
627 the bytes used to hold the size are included in the count. */
629 if (STRING_TABLE_OFFSET
== 0)
631 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
632 will never be zero, even when there is no string table. This
633 would appear to be a bug in bfd. */
634 DBX_STRINGTAB_SIZE (objfile
) = 0;
635 DBX_STRINGTAB (objfile
) = NULL
;
639 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
641 perror_with_name (name
);
643 memset (size_temp
, 0, sizeof (size_temp
));
644 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
647 perror_with_name (name
);
651 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
652 EOF if there is no string table, and attempting to read the size
653 from EOF will read zero bytes. */
654 DBX_STRINGTAB_SIZE (objfile
) = 0;
655 DBX_STRINGTAB (objfile
) = NULL
;
659 /* Read some data that would appear to be the string table size.
660 If there really is a string table, then it is probably the right
661 size. Byteswap if necessary and validate the size. Note that
662 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
663 random data that happened to be at STRING_TABLE_OFFSET, because
664 bfd can't tell us there is no string table, the sanity checks may
665 or may not catch this. */
666 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
668 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
669 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
670 error (_("ridiculous string table size (%d bytes)."),
671 DBX_STRINGTAB_SIZE (objfile
));
673 DBX_STRINGTAB (objfile
) =
674 (char *) obstack_alloc (&objfile
->objfile_obstack
,
675 DBX_STRINGTAB_SIZE (objfile
));
676 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
678 /* Now read in the string table in one big gulp. */
680 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
682 perror_with_name (name
);
683 val
= bfd_bread (DBX_STRINGTAB (objfile
),
684 DBX_STRINGTAB_SIZE (objfile
),
686 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
687 perror_with_name (name
);
692 /* Perform any local cleanups required when we are done with a particular
693 objfile. I.E, we are in the process of discarding all symbol information
694 for an objfile, freeing up all memory held for it, and unlinking the
695 objfile struct from the global list of known objfiles. */
698 dbx_symfile_finish (struct objfile
*objfile
)
700 free_header_files ();
703 dbx_symfile_info::~dbx_symfile_info ()
705 if (header_files
!= NULL
)
707 int i
= n_header_files
;
708 struct header_file
*hfiles
= header_files
;
712 xfree (hfiles
[i
].name
);
713 xfree (hfiles
[i
].vector
);
721 /* Buffer for reading the symbol table entries. */
722 static struct external_nlist symbuf
[4096];
723 static int symbuf_idx
;
724 static int symbuf_end
;
726 /* Name of last function encountered. Used in Solaris to approximate
727 object file boundaries. */
728 static const char *last_function_name
;
730 /* The address in memory of the string table of the object file we are
731 reading (which might not be the "main" object file, but might be a
732 shared library or some other dynamically loaded thing). This is
733 set by read_dbx_symtab when building psymtabs, and by
734 read_ofile_symtab when building symtabs, and is used only by
735 next_symbol_text. FIXME: If that is true, we don't need it when
736 building psymtabs, right? */
737 static char *stringtab_global
;
739 /* These variables are used to control fill_symbuf when the stabs
740 symbols are not contiguous (as may be the case when a COFF file is
741 linked using --split-by-reloc). */
742 static const std::vector
<asection
*> *symbuf_sections
;
743 static size_t sect_idx
;
744 static unsigned int symbuf_left
;
745 static unsigned int symbuf_read
;
747 /* This variable stores a global stabs buffer, if we read stabs into
748 memory in one chunk in order to process relocations. */
749 static bfd_byte
*stabs_data
;
751 /* Refill the symbol table input buffer
752 and set the variables that control fetching entries from it.
753 Reports an error if no data available.
754 This function can read past the end of the symbol table
755 (into the string table) but this does no harm. */
758 fill_symbuf (bfd
*sym_bfd
)
765 nbytes
= sizeof (symbuf
);
766 if (nbytes
> symbuf_left
)
767 nbytes
= symbuf_left
;
768 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
770 else if (symbuf_sections
== NULL
)
772 count
= sizeof (symbuf
);
773 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
777 if (symbuf_left
<= 0)
779 file_ptr filepos
= (*symbuf_sections
)[sect_idx
]->filepos
;
781 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
782 perror_with_name (bfd_get_filename (sym_bfd
));
783 symbuf_left
= bfd_section_size ((*symbuf_sections
)[sect_idx
]);
784 symbol_table_offset
= filepos
- symbuf_read
;
789 if (count
> sizeof (symbuf
))
790 count
= sizeof (symbuf
);
791 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
795 perror_with_name (bfd_get_filename (sym_bfd
));
796 else if (nbytes
== 0)
797 error (_("Premature end of file reading symbol table"));
798 symbuf_end
= nbytes
/ symbol_size
;
800 symbuf_left
-= nbytes
;
801 symbuf_read
+= nbytes
;
805 stabs_seek (int sym_offset
)
809 symbuf_read
+= sym_offset
;
810 symbuf_left
-= sym_offset
;
813 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
816 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
818 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
819 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
820 (intern).n_other = 0; \
821 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
822 if (bfd_get_sign_extend_vma (abfd)) \
823 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
825 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
828 /* Invariant: The symbol pointed to by symbuf_idx is the first one
829 that hasn't been swapped. Swap the symbol at the same time
830 that symbuf_idx is incremented. */
832 /* dbx allows the text of a symbol name to be continued into the
833 next symbol name! When such a continuation is encountered
834 (a \ at the end of the text of a name)
835 call this function to get the continuation. */
838 dbx_next_symbol_text (struct objfile
*objfile
)
840 struct internal_nlist nlist
;
842 if (symbuf_idx
== symbuf_end
)
843 fill_symbuf (symfile_bfd
);
846 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
847 OBJSTAT (objfile
, n_stabs
++);
851 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
855 /* Given a name, value pair, find the corresponding
856 bincl in the list. Return the partial symtab associated
857 with that header_file_location. */
859 static legacy_psymtab
*
860 find_corresponding_bincl_psymtab (const char *name
, int instance
)
862 for (const header_file_location
&bincl
: *bincl_list
)
863 if (bincl
.instance
== instance
864 && strcmp (name
, bincl
.name
) == 0)
867 repeated_header_complaint (name
, symnum
);
868 return (legacy_psymtab
*) 0;
871 /* Set namestring based on nlist. If the string table index is invalid,
872 give a fake name, and print a single error message per symbol file read,
873 rather than abort the symbol reading or flood the user with messages. */
876 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
878 const char *namestring
;
880 if (nlist
->n_strx
+ file_string_table_offset
881 >= DBX_STRINGTAB_SIZE (objfile
)
882 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
884 complaint (_("bad string table offset in symbol %d"),
886 namestring
= "<bad string table offset>";
889 namestring
= (nlist
->n_strx
+ file_string_table_offset
890 + DBX_STRINGTAB (objfile
));
894 static struct bound_minimal_symbol
895 find_stab_function (const char *namestring
, const char *filename
,
896 struct objfile
*objfile
)
898 struct bound_minimal_symbol msym
;
901 const char *colon
= strchr (namestring
, ':');
905 n
= colon
- namestring
;
907 char *p
= (char *) alloca (n
+ 2);
908 strncpy (p
, namestring
, n
);
911 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
912 if (msym
.minsym
== NULL
)
914 /* Sun Fortran appends an underscore to the minimal symbol name,
915 try again with an appended underscore if the minimal symbol
919 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
922 if (msym
.minsym
== NULL
&& filename
!= NULL
)
924 /* Try again without the filename. */
926 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
928 if (msym
.minsym
== NULL
&& filename
!= NULL
)
930 /* And try again for Sun Fortran, but without the filename. */
933 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
940 function_outside_compilation_unit_complaint (const char *arg1
)
942 complaint (_("function `%s' appears to be defined "
943 "outside of all compilation units"),
947 /* Setup partial_symtab's describing each source file for which
948 debugging information is available. */
951 read_dbx_symtab (minimal_symbol_reader
&reader
,
952 psymtab_storage
*partial_symtabs
,
953 struct objfile
*objfile
)
955 struct gdbarch
*gdbarch
= objfile
->arch ();
956 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
957 struct internal_nlist nlist
;
960 const char *sym_name
;
963 const char *namestring
;
965 int past_first_source_file
= 0;
966 CORE_ADDR last_function_start
= 0;
971 /* Current partial symtab. */
974 /* List of current psymtab's include files. */
975 const char **psymtab_include_list
;
976 int includes_allocated
;
979 /* Index within current psymtab dependency list. */
980 legacy_psymtab
**dependency_list
;
981 int dependencies_used
, dependencies_allocated
;
983 text_addr
= DBX_TEXT_ADDR (objfile
);
984 text_size
= DBX_TEXT_SIZE (objfile
);
986 /* FIXME. We probably want to change stringtab_global rather than add this
987 while processing every symbol entry. FIXME. */
988 file_string_table_offset
= 0;
989 next_file_string_table_offset
= 0;
991 stringtab_global
= DBX_STRINGTAB (objfile
);
993 pst
= (legacy_psymtab
*) 0;
995 includes_allocated
= 30;
997 psymtab_include_list
= (const char **) alloca (includes_allocated
*
998 sizeof (const char *));
1000 dependencies_allocated
= 30;
1001 dependencies_used
= 0;
1003 (legacy_psymtab
**) alloca (dependencies_allocated
*
1004 sizeof (legacy_psymtab
*));
1006 /* Init bincl list */
1007 std::vector
<struct header_file_location
> bincl_storage
;
1008 scoped_restore restore_bincl_global
1009 = make_scoped_restore (&bincl_list
, &bincl_storage
);
1011 set_last_source_file (NULL
);
1013 lowest_text_address
= (CORE_ADDR
) -1;
1015 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1016 abfd
= objfile
->obfd
;
1017 symbuf_end
= symbuf_idx
= 0;
1018 next_symbol_text_func
= dbx_next_symbol_text
;
1019 textlow_not_set
= 1;
1020 has_line_numbers
= 0;
1022 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1023 to global and static variables. The stab for a global or static
1024 variable doesn't give us any indication of which section it's in,
1025 so we can't tell immediately which offset in
1026 objfile->section_offsets we should apply to the variable's
1029 We could certainly find out which section contains the variable
1030 by looking up the variable's unrelocated address with
1031 find_pc_section, but that would be expensive; this is the
1032 function that constructs the partial symbol tables by examining
1033 every symbol in the entire executable, and it's
1034 performance-critical. So that expense would not be welcome. I'm
1035 not sure what to do about this at the moment.
1037 What we have done for years is to simply assume that the .data
1038 section's offset is appropriate for all global and static
1039 variables. Recently, this was expanded to fall back to the .bss
1040 section's offset if there is no .data section, and then to the
1041 .rodata section's offset. */
1042 data_sect_index
= objfile
->sect_index_data
;
1043 if (data_sect_index
== -1)
1044 data_sect_index
= SECT_OFF_BSS (objfile
);
1045 if (data_sect_index
== -1)
1046 data_sect_index
= SECT_OFF_RODATA (objfile
);
1048 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1049 for the file to have no .data, no .bss, and no .text at all, if
1050 it also has no global or static variables. */
1052 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1054 /* Get the symbol for this run and pull out some info. */
1055 QUIT
; /* Allow this to be interruptable. */
1056 if (symbuf_idx
== symbuf_end
)
1058 bufp
= &symbuf
[symbuf_idx
++];
1061 * Special case to speed up readin.
1063 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1065 has_line_numbers
= 1;
1069 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1070 OBJSTAT (objfile
, n_stabs
++);
1072 /* Ok. There is a lot of code duplicated in the rest of this
1073 switch statement (for efficiency reasons). Since I don't
1074 like duplicating code, I will do my penance here, and
1075 describe the code which is duplicated:
1077 *) The assignment to namestring.
1078 *) The call to strchr.
1079 *) The addition of a partial symbol the two partial
1080 symbol lists. This last is a large section of code, so
1081 I've imbedded it in the following macro. */
1083 switch (nlist
.n_type
)
1086 * Standard, external, non-debugger, symbols
1089 case N_TEXT
| N_EXT
:
1090 case N_NBTEXT
| N_EXT
:
1093 case N_DATA
| N_EXT
:
1094 case N_NBDATA
| N_EXT
:
1099 case N_NBBSS
| N_EXT
:
1100 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1105 namestring
= set_namestring (objfile
, &nlist
);
1107 record_minimal_symbol (reader
, namestring
, nlist
.n_value
,
1108 nlist
.n_type
, objfile
); /* Always */
1111 /* Standard, local, non-debugger, symbols. */
1115 /* We need to be able to deal with both N_FN or N_TEXT,
1116 because we have no way of knowing whether the sys-supplied ld
1117 or GNU ld was used to make the executable. Sequents throw
1118 in another wrinkle -- they renumbered N_FN. */
1123 namestring
= set_namestring (objfile
, &nlist
);
1125 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1126 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1127 && namestring
[nsl
- 2] == '.'))
1129 if (past_first_source_file
&& pst
1130 /* The gould NP1 uses low values for .o and -l symbols
1131 which are not the address. */
1132 && nlist
.n_value
>= pst
->raw_text_low ())
1134 dbx_end_psymtab (objfile
, partial_symtabs
,
1135 pst
, psymtab_include_list
,
1136 includes_used
, symnum
* symbol_size
,
1137 nlist
.n_value
> pst
->raw_text_high ()
1138 ? nlist
.n_value
: pst
->raw_text_high (),
1139 dependency_list
, dependencies_used
,
1141 pst
= (legacy_psymtab
*) 0;
1143 dependencies_used
= 0;
1144 has_line_numbers
= 0;
1147 past_first_source_file
= 1;
1156 case N_UNDF
| N_EXT
:
1157 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1158 We used to rely on the target to tell us whether it knows
1159 where the symbol has been relocated to, but none of the
1160 target implementations actually provided that operation.
1161 So we just ignore the symbol, the same way we would do if
1162 we had a target-side symbol lookup which returned no match.
1164 All other symbols (with nlist.n_value == 0), are really
1165 undefined, and so we ignore them too. */
1169 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1171 /* Deal with relative offsets in the string table
1172 used in ELF+STAB under Solaris. If we want to use the
1173 n_strx field, which contains the name of the file,
1174 we must adjust file_string_table_offset *before* calling
1175 set_namestring(). */
1176 past_first_source_file
= 1;
1177 file_string_table_offset
= next_file_string_table_offset
;
1178 next_file_string_table_offset
=
1179 file_string_table_offset
+ nlist
.n_value
;
1180 if (next_file_string_table_offset
< file_string_table_offset
)
1181 error (_("string table offset backs up at %d"), symnum
);
1182 /* FIXME -- replace error() with complaint. */
1187 /* Lots of symbol types we can just ignore. */
1194 /* Keep going . . . */
1197 * Special symbol types for GNU
1200 case N_INDR
| N_EXT
:
1202 case N_SETA
| N_EXT
:
1204 case N_SETT
| N_EXT
:
1206 case N_SETD
| N_EXT
:
1208 case N_SETB
| N_EXT
:
1219 static int prev_so_symnum
= -10;
1220 static int first_so_symnum
;
1222 static const char *dirname_nso
;
1223 int prev_textlow_not_set
;
1225 valu
= nlist
.n_value
;
1227 prev_textlow_not_set
= textlow_not_set
;
1229 /* A zero value is probably an indication for the SunPRO 3.0
1230 compiler. dbx_end_psymtab explicitly tests for zero, so
1231 don't relocate it. */
1233 if (nlist
.n_value
== 0
1234 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1236 textlow_not_set
= 1;
1240 textlow_not_set
= 0;
1242 past_first_source_file
= 1;
1244 if (prev_so_symnum
!= symnum
- 1)
1245 { /* Here if prev stab wasn't N_SO. */
1246 first_so_symnum
= symnum
;
1250 dbx_end_psymtab (objfile
, partial_symtabs
,
1251 pst
, psymtab_include_list
,
1252 includes_used
, symnum
* symbol_size
,
1253 (valu
> pst
->raw_text_high ()
1254 ? valu
: pst
->raw_text_high ()),
1255 dependency_list
, dependencies_used
,
1256 prev_textlow_not_set
);
1257 pst
= (legacy_psymtab
*) 0;
1259 dependencies_used
= 0;
1260 has_line_numbers
= 0;
1264 prev_so_symnum
= symnum
;
1266 /* End the current partial symtab and start a new one. */
1268 namestring
= set_namestring (objfile
, &nlist
);
1270 /* Null name means end of .o file. Don't start a new one. */
1271 if (*namestring
== '\000')
1274 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1275 The first one is a directory name; the second the file name.
1276 If pst exists, is empty, and has a filename ending in '/',
1277 we assume the previous N_SO was a directory name. */
1279 p
= lbasename (namestring
);
1280 if (p
!= namestring
&& *p
== '\000')
1282 /* Save the directory name SOs locally, then save it into
1283 the psymtab when it's created below. */
1284 dirname_nso
= namestring
;
1288 /* Some other compilers (C++ ones in particular) emit useless
1289 SOs for non-existant .c files. We ignore all subsequent SOs
1290 that immediately follow the first. */
1294 pst
= start_psymtab (partial_symtabs
, objfile
,
1296 first_so_symnum
* symbol_size
);
1297 pst
->dirname
= dirname_nso
;
1305 enum language tmp_language
;
1307 /* Add this bincl to the bincl_list for future EXCLs. No
1308 need to save the string; it'll be around until
1309 read_dbx_symtab function returns. */
1311 namestring
= set_namestring (objfile
, &nlist
);
1312 tmp_language
= deduce_language_from_filename (namestring
);
1314 /* Only change the psymtab's language if we've learned
1315 something useful (eg. tmp_language is not language_unknown).
1316 In addition, to match what start_subfile does, never change
1318 if (tmp_language
!= language_unknown
1319 && (tmp_language
!= language_c
1320 || psymtab_language
!= language_cplus
))
1321 psymtab_language
= tmp_language
;
1325 /* FIXME: we should not get here without a PST to work on.
1326 Attempt to recover. */
1327 complaint (_("N_BINCL %s not in entries for "
1328 "any file, at symtab pos %d"),
1329 namestring
, symnum
);
1332 bincl_list
->emplace_back (namestring
, nlist
.n_value
, pst
);
1334 /* Mark down an include file in the current psymtab. */
1336 goto record_include_file
;
1341 enum language tmp_language
;
1343 /* Mark down an include file in the current psymtab. */
1344 namestring
= set_namestring (objfile
, &nlist
);
1345 tmp_language
= deduce_language_from_filename (namestring
);
1347 /* Only change the psymtab's language if we've learned
1348 something useful (eg. tmp_language is not language_unknown).
1349 In addition, to match what start_subfile does, never change
1351 if (tmp_language
!= language_unknown
1352 && (tmp_language
!= language_c
1353 || psymtab_language
!= language_cplus
))
1354 psymtab_language
= tmp_language
;
1356 /* In C++, one may expect the same filename to come round many
1357 times, when code is coming alternately from the main file
1358 and from inline functions in other files. So I check to see
1359 if this is a file we've seen before -- either the main
1360 source file, or a previously included file.
1362 This seems to be a lot of time to be spending on N_SOL, but
1363 things like "break c-exp.y:435" need to work (I
1364 suppose the psymtab_include_list could be hashed or put
1365 in a binary tree, if profiling shows this is a major hog). */
1366 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
1371 for (i
= 0; i
< includes_used
; i
++)
1372 if (filename_cmp (namestring
, psymtab_include_list
[i
]) == 0)
1381 record_include_file
:
1383 psymtab_include_list
[includes_used
++] = namestring
;
1384 if (includes_used
>= includes_allocated
)
1386 const char **orig
= psymtab_include_list
;
1388 psymtab_include_list
= (const char **)
1389 alloca ((includes_allocated
*= 2) * sizeof (const char *));
1390 memcpy (psymtab_include_list
, orig
,
1391 includes_used
* sizeof (const char *));
1395 case N_LSYM
: /* Typedef or automatic variable. */
1396 case N_STSYM
: /* Data seg var -- static. */
1397 case N_LCSYM
: /* BSS " */
1398 case N_ROSYM
: /* Read-only data seg var -- static. */
1399 case N_NBSTS
: /* Gould nobase. */
1400 case N_NBLCS
: /* symbols. */
1402 case N_GSYM
: /* Global (extern) variable; can be
1403 data or bss (sigh FIXME). */
1405 /* Following may probably be ignored; I'll leave them here
1406 for now (until I do Pascal and Modula 2 extensions). */
1408 case N_PC
: /* I may or may not need this; I
1410 case N_M2C
: /* I suspect that I can ignore this here. */
1411 case N_SCOPE
: /* Same. */
1415 namestring
= set_namestring (objfile
, &nlist
);
1417 /* See if this is an end of function stab. */
1418 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1422 /* It's value is the size (in bytes) of the function for
1423 function relative stabs, or the address of the function's
1424 end for old style stabs. */
1425 valu
= nlist
.n_value
+ last_function_start
;
1426 if (pst
->raw_text_high () == 0 || valu
> pst
->raw_text_high ())
1427 pst
->set_text_high (valu
);
1431 p
= (char *) strchr (namestring
, ':');
1433 continue; /* Not a debugging symbol. */
1436 sym_name
= NULL
; /* pacify "gcc -Werror" */
1437 if (psymtab_language
== language_cplus
)
1439 std::string
name (namestring
, p
- namestring
);
1440 gdb::unique_xmalloc_ptr
<char> new_name
1441 = cp_canonicalize_string (name
.c_str ());
1442 if (new_name
!= nullptr)
1444 sym_len
= strlen (new_name
.get ());
1445 sym_name
= obstack_strdup (&objfile
->objfile_obstack
,
1452 sym_name
= namestring
;
1453 sym_len
= p
- namestring
;
1456 /* Main processing section for debugging symbols which
1457 the initial read through the symbol tables needs to worry
1458 about. If we reach this point, the symbol which we are
1459 considering is definitely one we are interested in.
1460 p must also contain the (valid) index into the namestring
1461 which indicates the debugging type symbol. */
1466 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
), true,
1467 VAR_DOMAIN
, LOC_STATIC
,
1469 psymbol_placement::STATIC
,
1470 nlist
.n_value
, psymtab_language
,
1471 partial_symtabs
, objfile
);
1475 /* The addresses in these entries are reported to be
1476 wrong. See the code that reads 'G's for symtabs. */
1477 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
), true,
1478 VAR_DOMAIN
, LOC_STATIC
,
1480 psymbol_placement::GLOBAL
,
1481 nlist
.n_value
, psymtab_language
,
1482 partial_symtabs
, objfile
);
1486 /* When a 'T' entry is defining an anonymous enum, it
1487 may have a name which is the empty string, or a
1488 single space. Since they're not really defining a
1489 symbol, those shouldn't go in the partial symbol
1490 table. We do pick up the elements of such enums at
1491 'check_enum:', below. */
1492 if (p
>= namestring
+ 2
1493 || (p
== namestring
+ 1
1494 && namestring
[0] != ' '))
1496 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
),
1497 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
1498 psymbol_placement::STATIC
,
1499 0, psymtab_language
,
1500 partial_symtabs
, objfile
);
1503 /* Also a typedef with the same name. */
1504 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
),
1505 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
1506 psymbol_placement::STATIC
,
1507 0, psymtab_language
,
1508 partial_symtabs
, objfile
);
1515 if (p
!= namestring
) /* a name is there, not just :T... */
1517 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
),
1518 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
1519 psymbol_placement::STATIC
,
1520 0, psymtab_language
,
1521 partial_symtabs
, objfile
);
1524 /* If this is an enumerated type, we need to
1525 add all the enum constants to the partial symbol
1526 table. This does not cover enums without names, e.g.
1527 "enum {a, b} c;" in C, but fortunately those are
1528 rare. There is no way for GDB to find those from the
1529 enum type without spending too much time on it. Thus
1530 to solve this problem, the compiler needs to put out the
1531 enum in a nameless type. GCC2 does this. */
1533 /* We are looking for something of the form
1534 <name> ":" ("t" | "T") [<number> "="] "e"
1535 {<constant> ":" <value> ","} ";". */
1537 /* Skip over the colon and the 't' or 'T'. */
1539 /* This type may be given a number. Also, numbers can come
1540 in pairs like (0,26). Skip over it. */
1541 while ((*p
>= '0' && *p
<= '9')
1542 || *p
== '(' || *p
== ',' || *p
== ')'
1548 /* The aix4 compiler emits extra crud before the members. */
1551 /* Skip over the type (?). */
1555 /* Skip over the colon. */
1559 /* We have found an enumerated type. */
1560 /* According to comments in read_enum_type
1561 a comma could end it instead of a semicolon.
1562 I don't know where that happens.
1564 while (*p
&& *p
!= ';' && *p
!= ',')
1568 /* Check for and handle cretinous dbx symbol name
1570 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1571 p
= next_symbol_text (objfile
);
1573 /* Point to the character after the name
1574 of the enum constant. */
1575 for (q
= p
; *q
&& *q
!= ':'; q
++)
1577 /* Note that the value doesn't matter for
1578 enum constants in psymtabs, just in symtabs. */
1579 pst
->add_psymbol (gdb::string_view (p
, q
- p
), true,
1580 VAR_DOMAIN
, LOC_CONST
, -1,
1581 psymbol_placement::STATIC
, 0,
1583 partial_symtabs
, objfile
);
1584 /* Point past the name. */
1586 /* Skip over the value. */
1587 while (*p
&& *p
!= ',')
1589 /* Advance past the comma. */
1597 /* Constant, e.g. from "const" in Pascal. */
1598 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
), true,
1599 VAR_DOMAIN
, LOC_CONST
, -1,
1600 psymbol_placement::STATIC
, 0,
1602 partial_symtabs
, objfile
);
1608 int name_len
= p
- namestring
;
1609 char *name
= (char *) xmalloc (name_len
+ 1);
1611 memcpy (name
, namestring
, name_len
);
1612 name
[name_len
] = '\0';
1613 function_outside_compilation_unit_complaint (name
);
1616 /* Kludges for ELF/STABS with Sun ACC. */
1617 last_function_name
= namestring
;
1618 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1619 value for the bottom of the text seg in those cases. */
1620 if (nlist
.n_value
== 0
1621 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1623 struct bound_minimal_symbol minsym
1624 = find_stab_function (namestring
,
1625 pst
? pst
->filename
: NULL
,
1627 if (minsym
.minsym
!= NULL
)
1628 nlist
.n_value
= MSYMBOL_VALUE_RAW_ADDRESS (minsym
.minsym
);
1630 if (pst
&& textlow_not_set
1631 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1633 pst
->set_text_low (nlist
.n_value
);
1634 textlow_not_set
= 0;
1638 /* Keep track of the start of the last function so we
1639 can handle end of function symbols. */
1640 last_function_start
= nlist
.n_value
;
1642 /* In reordered executables this function may lie outside
1643 the bounds created by N_SO symbols. If that's the case
1644 use the address of this function as the low bound for
1645 the partial symbol table. */
1648 || (nlist
.n_value
< pst
->raw_text_low ()
1649 && (nlist
.n_value
!= 0))))
1651 pst
->set_text_low (nlist
.n_value
);
1652 textlow_not_set
= 0;
1654 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
), true,
1655 VAR_DOMAIN
, LOC_BLOCK
,
1656 SECT_OFF_TEXT (objfile
),
1657 psymbol_placement::STATIC
,
1658 nlist
.n_value
, psymtab_language
,
1659 partial_symtabs
, objfile
);
1662 /* Global functions were ignored here, but now they
1663 are put into the global psymtab like one would expect.
1664 They're also in the minimal symbol table. */
1668 int name_len
= p
- namestring
;
1669 char *name
= (char *) xmalloc (name_len
+ 1);
1671 memcpy (name
, namestring
, name_len
);
1672 name
[name_len
] = '\0';
1673 function_outside_compilation_unit_complaint (name
);
1676 /* Kludges for ELF/STABS with Sun ACC. */
1677 last_function_name
= namestring
;
1678 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1679 value for the bottom of the text seg in those cases. */
1680 if (nlist
.n_value
== 0
1681 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1683 struct bound_minimal_symbol minsym
1684 = find_stab_function (namestring
,
1685 pst
? pst
->filename
: NULL
,
1687 if (minsym
.minsym
!= NULL
)
1688 nlist
.n_value
= MSYMBOL_VALUE_RAW_ADDRESS (minsym
.minsym
);
1690 if (pst
&& textlow_not_set
1691 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1693 pst
->set_text_low (nlist
.n_value
);
1694 textlow_not_set
= 0;
1698 /* Keep track of the start of the last function so we
1699 can handle end of function symbols. */
1700 last_function_start
= nlist
.n_value
;
1702 /* In reordered executables this function may lie outside
1703 the bounds created by N_SO symbols. If that's the case
1704 use the address of this function as the low bound for
1705 the partial symbol table. */
1708 || (nlist
.n_value
< pst
->raw_text_low ()
1709 && (nlist
.n_value
!= 0))))
1711 pst
->set_text_low (nlist
.n_value
);
1712 textlow_not_set
= 0;
1714 pst
->add_psymbol (gdb::string_view (sym_name
, sym_len
), true,
1715 VAR_DOMAIN
, LOC_BLOCK
,
1716 SECT_OFF_TEXT (objfile
),
1717 psymbol_placement::GLOBAL
,
1718 nlist
.n_value
, psymtab_language
,
1719 partial_symtabs
, objfile
);
1722 /* Two things show up here (hopefully); static symbols of
1723 local scope (static used inside braces) or extensions
1724 of structure symbols. We can ignore both. */
1738 case '#': /* For symbol identification (used in live ranges). */
1742 /* It is a C++ nested symbol. We don't need to record it
1743 (I don't think); if we try to look up foo::bar::baz,
1744 then symbols for the symtab containing foo should get
1745 read in, I think. */
1746 /* Someone says sun cc puts out symbols like
1747 /foo/baz/maclib::/usr/local/bin/maclib,
1748 which would get here with a symbol type of ':'. */
1752 /* Unexpected symbol descriptor. The second and subsequent stabs
1753 of a continued stab can show up here. The question is
1754 whether they ever can mimic a normal stab--it would be
1755 nice if not, since we certainly don't want to spend the
1756 time searching to the end of every string looking for
1759 complaint (_("unknown symbol descriptor `%c'"),
1762 /* Ignore it; perhaps it is an extension that we don't
1770 namestring
= set_namestring (objfile
, &nlist
);
1772 /* Find the corresponding bincl and mark that psymtab on the
1773 psymtab dependency list. */
1775 legacy_psymtab
*needed_pst
=
1776 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
1778 /* If this include file was defined earlier in this file,
1780 if (needed_pst
== pst
)
1788 for (i
= 0; i
< dependencies_used
; i
++)
1789 if (dependency_list
[i
] == needed_pst
)
1795 /* If it's already in the list, skip the rest. */
1799 dependency_list
[dependencies_used
++] = needed_pst
;
1800 if (dependencies_used
>= dependencies_allocated
)
1802 legacy_psymtab
**orig
= dependency_list
;
1806 alloca ((dependencies_allocated
*= 2)
1807 * sizeof (legacy_psymtab
*));
1808 memcpy (dependency_list
, orig
,
1810 * sizeof (legacy_psymtab
*)));
1812 fprintf_unfiltered (gdb_stderr
,
1813 "Had to reallocate "
1814 "dependency list.\n");
1815 fprintf_unfiltered (gdb_stderr
,
1816 "New dependencies allocated: %d\n",
1817 dependencies_allocated
);
1825 /* Solaris 2 end of module, finish current partial symbol
1826 table. dbx_end_psymtab will set the high text address of
1827 PST to the proper value, which is necessary if a module
1828 compiled without debugging info follows this module. */
1829 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
1831 dbx_end_psymtab (objfile
, partial_symtabs
, pst
,
1832 psymtab_include_list
, includes_used
,
1833 symnum
* symbol_size
,
1834 (CORE_ADDR
) 0, dependency_list
,
1835 dependencies_used
, textlow_not_set
);
1836 pst
= (legacy_psymtab
*) 0;
1838 dependencies_used
= 0;
1839 has_line_numbers
= 0;
1845 HANDLE_RBRAC (nlist
.n_value
);
1851 case N_SSYM
: /* Claim: Structure or union element.
1852 Hopefully, I can ignore this. */
1853 case N_ENTRY
: /* Alternate entry point; can ignore. */
1854 case N_MAIN
: /* Can definitely ignore this. */
1855 case N_CATCH
: /* These are GNU C++ extensions */
1856 case N_EHDECL
: /* that can safely be ignored here. */
1868 case N_NSYMS
: /* Ultrix 4.0: symbol count */
1869 case N_DEFD
: /* GNU Modula-2 */
1870 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
1872 case N_OBJ
: /* Useless types from Solaris. */
1875 /* These symbols aren't interesting; don't worry about them. */
1879 /* If we haven't found it yet, ignore it. It's probably some
1880 new type we don't know about yet. */
1881 unknown_symtype_complaint (hex_string (nlist
.n_type
));
1886 /* If there's stuff to be cleaned up, clean it up. */
1889 /* Don't set high text address of PST lower than it already
1891 CORE_ADDR text_end
=
1892 (lowest_text_address
== (CORE_ADDR
) -1
1894 : lowest_text_address
)
1897 dbx_end_psymtab (objfile
, partial_symtabs
,
1898 pst
, psymtab_include_list
, includes_used
,
1899 symnum
* symbol_size
,
1900 (text_end
> pst
->raw_text_high ()
1901 ? text_end
: pst
->raw_text_high ()),
1902 dependency_list
, dependencies_used
, textlow_not_set
);
1906 /* Allocate and partially fill a partial symtab. It will be
1907 completely filled at the end of the symbol list.
1909 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1910 is the address relative to which its symbols are (incremental) or 0
1913 static legacy_psymtab
*
1914 start_psymtab (psymtab_storage
*partial_symtabs
, struct objfile
*objfile
,
1915 const char *filename
, CORE_ADDR textlow
, int ldsymoff
)
1917 legacy_psymtab
*result
= new legacy_psymtab (filename
, partial_symtabs
,
1920 result
->read_symtab_private
=
1921 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
1922 LDSYMOFF (result
) = ldsymoff
;
1923 result
->legacy_read_symtab
= dbx_read_symtab
;
1924 result
->legacy_expand_psymtab
= dbx_expand_psymtab
;
1925 SYMBOL_SIZE (result
) = symbol_size
;
1926 SYMBOL_OFFSET (result
) = symbol_table_offset
;
1927 STRING_OFFSET (result
) = string_table_offset
;
1928 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
1930 /* Deduce the source language from the filename for this psymtab. */
1931 psymtab_language
= deduce_language_from_filename (filename
);
1932 PST_LANGUAGE (result
) = psymtab_language
;
1937 /* Close off the current usage of PST.
1938 Returns PST or NULL if the partial symtab was empty and thrown away.
1940 FIXME: List variables and peculiarities of same. */
1943 dbx_end_psymtab (struct objfile
*objfile
, psymtab_storage
*partial_symtabs
,
1944 legacy_psymtab
*pst
,
1945 const char **include_list
, int num_includes
,
1946 int capping_symbol_offset
, CORE_ADDR capping_text
,
1947 legacy_psymtab
**dependency_list
,
1948 int number_dependencies
,
1949 int textlow_not_set
)
1952 struct gdbarch
*gdbarch
= objfile
->arch ();
1954 if (capping_symbol_offset
!= -1)
1955 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
1956 pst
->set_text_high (capping_text
);
1958 /* Under Solaris, the N_SO symbols always have a value of 0,
1959 instead of the usual address of the .o file. Therefore,
1960 we have to do some tricks to fill in texthigh and textlow.
1961 The first trick is: if we see a static
1962 or global function, and the textlow for the current pst
1963 is not set (ie: textlow_not_set), then we use that function's
1964 address for the textlow of the pst. */
1966 /* Now, to fill in texthigh, we remember the last function seen
1967 in the .o file. Also, there's a hack in
1968 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1969 to here via the misc_info field. Therefore, we can fill in
1970 a reliable texthigh by taking the address plus size of the
1971 last function in the file. */
1973 if (!pst
->text_high_valid
&& last_function_name
1974 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1977 struct bound_minimal_symbol minsym
;
1979 const char *colon
= strchr (last_function_name
, ':');
1983 n
= colon
- last_function_name
;
1984 char *p
= (char *) alloca (n
+ 2);
1985 strncpy (p
, last_function_name
, n
);
1988 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
1989 if (minsym
.minsym
== NULL
)
1991 /* Sun Fortran appends an underscore to the minimal symbol name,
1992 try again with an appended underscore if the minimal symbol
1996 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
2000 pst
->set_text_high (MSYMBOL_VALUE_RAW_ADDRESS (minsym
.minsym
)
2001 + MSYMBOL_SIZE (minsym
.minsym
));
2003 last_function_name
= NULL
;
2006 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
2008 /* This test will be true if the last .o file is only data. */
2009 else if (textlow_not_set
)
2010 pst
->set_text_low (pst
->raw_text_high ());
2013 /* If we know our own starting text address, then walk through all other
2014 psymtabs for this objfile, and if any didn't know their ending text
2015 address, set it to our starting address. Take care to not set our
2016 own ending address to our starting address. */
2018 for (partial_symtab
*p1
: partial_symtabs
->range ())
2019 if (!p1
->text_high_valid
&& p1
->text_low_valid
&& p1
!= pst
)
2020 p1
->set_text_high (pst
->raw_text_low ());
2023 /* End of kludge for patching Solaris textlow and texthigh. */
2027 pst
->number_of_dependencies
= number_dependencies
;
2028 if (number_dependencies
)
2031 = partial_symtabs
->allocate_dependencies (number_dependencies
);
2032 memcpy (pst
->dependencies
, dependency_list
,
2033 number_dependencies
* sizeof (legacy_psymtab
*));
2036 pst
->dependencies
= 0;
2038 for (i
= 0; i
< num_includes
; i
++)
2040 legacy_psymtab
*subpst
=
2041 new legacy_psymtab (include_list
[i
], partial_symtabs
, objfile
);
2043 subpst
->read_symtab_private
=
2044 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2046 LDSYMLEN (subpst
) = 0;
2048 /* We could save slight bits of space by only making one of these,
2049 shared by the entire set of include files. FIXME-someday. */
2050 subpst
->dependencies
=
2051 partial_symtabs
->allocate_dependencies (1);
2052 subpst
->dependencies
[0] = pst
;
2053 subpst
->number_of_dependencies
= 1;
2055 subpst
->legacy_read_symtab
= pst
->legacy_read_symtab
;
2056 subpst
->legacy_expand_psymtab
= pst
->legacy_expand_psymtab
;
2059 if (num_includes
== 0
2060 && number_dependencies
== 0
2062 && has_line_numbers
== 0)
2064 /* Throw away this psymtab, it's empty. */
2065 /* Empty psymtabs happen as a result of header files which don't have
2066 any symbols in them. There can be a lot of them. But this check
2067 is wrong, in that a psymtab with N_SLINE entries but nothing else
2068 is not empty, but we don't realize that. Fixing that without slowing
2069 things down might be tricky. */
2071 partial_symtabs
->discard_psymtab (pst
);
2073 /* Indicate that psymtab was thrown away. */
2080 dbx_expand_psymtab (legacy_psymtab
*pst
, struct objfile
*objfile
)
2082 gdb_assert (!pst
->readin
);
2084 /* Read in all partial symtabs on which this one is dependent. */
2085 pst
->expand_dependencies (objfile
);
2087 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2089 /* Init stuff necessary for reading in symbols */
2091 scoped_free_pendings free_pending
;
2092 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2093 symbol_size
= SYMBOL_SIZE (pst
);
2095 /* Read in this file's symbols. */
2096 bfd_seek (objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2097 read_ofile_symtab (objfile
, pst
);
2103 /* Read in all of the symbols for a given psymtab for real.
2104 Be verbose about it if the user wants that. SELF is not NULL. */
2107 dbx_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
2109 gdb_assert (!self
->readin
);
2111 if (LDSYMLEN (self
) || self
->number_of_dependencies
)
2113 next_symbol_text_func
= dbx_next_symbol_text
;
2116 scoped_restore restore_stabs_data
= make_scoped_restore (&stabs_data
);
2117 gdb::unique_xmalloc_ptr
<gdb_byte
> data_holder
;
2118 if (DBX_STAB_SECTION (objfile
))
2121 = symfile_relocate_debug_section (objfile
,
2122 DBX_STAB_SECTION (objfile
),
2124 data_holder
.reset (stabs_data
);
2127 self
->expand_psymtab (objfile
);
2130 /* Match with global symbols. This only needs to be done once,
2131 after all of the symtabs and dependencies have been read in. */
2132 scan_file_globals (objfile
);
2136 /* Read in a defined section of a specific object file's symbols. */
2139 read_ofile_symtab (struct objfile
*objfile
, legacy_psymtab
*pst
)
2141 const char *namestring
;
2142 struct external_nlist
*bufp
;
2143 struct internal_nlist nlist
;
2145 unsigned max_symnum
;
2147 int sym_offset
; /* Offset to start of symbols to read */
2148 int sym_size
; /* Size of symbols to read */
2149 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2150 int text_size
; /* Size of text segment for symbols */
2152 sym_offset
= LDSYMOFF (pst
);
2153 sym_size
= LDSYMLEN (pst
);
2154 text_offset
= pst
->text_low (objfile
);
2155 text_size
= pst
->text_high (objfile
) - pst
->text_low (objfile
);
2156 const section_offsets
§ion_offsets
= objfile
->section_offsets
;
2158 dbxread_objfile
= objfile
;
2160 stringtab_global
= DBX_STRINGTAB (objfile
);
2161 set_last_source_file (NULL
);
2163 abfd
= objfile
->obfd
;
2164 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2165 symbuf_end
= symbuf_idx
= 0;
2167 symbuf_left
= sym_offset
+ sym_size
;
2169 /* It is necessary to actually read one symbol *before* the start
2170 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2171 occurs before the N_SO symbol.
2173 Detecting this in read_dbx_symtab
2174 would slow down initial readin, so we look for it here instead. */
2175 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2177 stabs_seek (sym_offset
- symbol_size
);
2179 bufp
= &symbuf
[symbuf_idx
++];
2180 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2181 OBJSTAT (objfile
, n_stabs
++);
2183 namestring
= set_namestring (objfile
, &nlist
);
2185 processing_gcc_compilation
= 0;
2186 if (nlist
.n_type
== N_TEXT
)
2188 const char *tempstring
= namestring
;
2190 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2191 processing_gcc_compilation
= 1;
2192 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2193 processing_gcc_compilation
= 2;
2194 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2196 if (startswith (tempstring
, "__gnu_compiled"))
2197 processing_gcc_compilation
= 2;
2202 /* The N_SO starting this symtab is the first symbol, so we
2203 better not check the symbol before it. I'm not this can
2204 happen, but it doesn't hurt to check for it. */
2205 stabs_seek (sym_offset
);
2206 processing_gcc_compilation
= 0;
2209 if (symbuf_idx
== symbuf_end
)
2211 bufp
= &symbuf
[symbuf_idx
];
2212 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2213 error (_("First symbol in segment of executable not a source symbol"));
2215 max_symnum
= sym_size
/ symbol_size
;
2218 symnum
< max_symnum
;
2221 QUIT
; /* Allow this to be interruptable. */
2222 if (symbuf_idx
== symbuf_end
)
2224 bufp
= &symbuf
[symbuf_idx
++];
2225 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2226 OBJSTAT (objfile
, n_stabs
++);
2228 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2230 namestring
= set_namestring (objfile
, &nlist
);
2234 if (sizeof (nlist
.n_value
) > 4
2235 /* We are a 64-bit debugger debugging a 32-bit program. */
2236 && (type
== N_LSYM
|| type
== N_PSYM
))
2237 /* We have to be careful with the n_value in the case of N_LSYM
2238 and N_PSYM entries, because they are signed offsets from frame
2239 pointer, but we actually read them as unsigned 32-bit values.
2240 This is not a problem for 32-bit debuggers, for which negative
2241 values end up being interpreted correctly (as negative
2242 offsets) due to integer overflow.
2243 But we need to sign-extend the value for 64-bit debuggers,
2244 or we'll end up interpreting negative values as very large
2245 positive offsets. */
2246 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2247 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2248 namestring
, section_offsets
, objfile
,
2249 PST_LANGUAGE (pst
));
2251 /* We skip checking for a new .o or -l file; that should never
2252 happen in this routine. */
2253 else if (type
== N_TEXT
)
2255 /* I don't think this code will ever be executed, because
2256 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2257 the N_SO symbol which starts this source file.
2258 However, there is no reason not to accept
2259 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2261 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2262 processing_gcc_compilation
= 1;
2263 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2264 processing_gcc_compilation
= 2;
2266 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2267 || type
== (unsigned char) N_NBTEXT
)
2269 /* Global symbol: see if we came across a dbx definition for
2270 a corresponding symbol. If so, store the value. Remove
2271 syms from the chain when their values are stored, but
2272 search the whole chain, as there may be several syms from
2273 different files with the same name. */
2274 /* This is probably not true. Since the files will be read
2275 in one at a time, each reference to a global symbol will
2276 be satisfied in each file as it appears. So we skip this
2282 /* In a Solaris elf file, this variable, which comes from the value
2283 of the N_SO symbol, will still be 0. Luckily, text_offset, which
2284 comes from low text address of PST, is correct. */
2285 if (get_last_source_start_addr () == 0)
2286 set_last_source_start_addr (text_offset
);
2288 /* In reordered executables last_source_start_addr may not be the
2289 lower bound for this symtab, instead use text_offset which comes
2290 from the low text address of PST, which is correct. */
2291 if (get_last_source_start_addr () > text_offset
)
2292 set_last_source_start_addr (text_offset
);
2294 pst
->compunit_symtab
= end_symtab (text_offset
+ text_size
,
2295 SECT_OFF_TEXT (objfile
));
2299 dbxread_objfile
= NULL
;
2303 /* Record the namespace that the function defined by SYMBOL was
2304 defined in, if necessary. BLOCK is the associated block; use
2305 OBSTACK for allocation. */
2308 cp_set_block_scope (const struct symbol
*symbol
,
2309 struct block
*block
,
2310 struct obstack
*obstack
)
2312 if (symbol
->demangled_name () != NULL
)
2314 /* Try to figure out the appropriate namespace from the
2317 /* FIXME: carlton/2003-04-15: If the function in question is
2318 a method of a class, the name will actually include the
2319 name of the class as well. This should be harmless, but
2320 is a little unfortunate. */
2322 const char *name
= symbol
->demangled_name ();
2323 unsigned int prefix_len
= cp_entire_prefix_len (name
);
2325 block_set_scope (block
, obstack_strndup (obstack
, name
, prefix_len
),
2330 /* This handles a single symbol from the symbol-file, building symbols
2331 into a GDB symtab. It takes these arguments and an implicit argument.
2333 TYPE is the type field of the ".stab" symbol entry.
2334 DESC is the desc field of the ".stab" entry.
2335 VALU is the value field of the ".stab" entry.
2336 NAME is the symbol name, in our address space.
2337 SECTION_OFFSETS is a set of amounts by which the sections of this
2338 object file were relocated when it was loaded into memory. Note
2339 that these section_offsets are not the objfile->section_offsets but
2340 the pst->section_offsets. All symbols that refer to memory
2341 locations need to be offset by these amounts.
2342 OBJFILE is the object file from which we are reading symbols. It
2343 is used in end_symtab.
2344 LANGUAGE is the language of the symtab.
2348 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, const char *name
,
2349 const section_offsets
§ion_offsets
,
2350 struct objfile
*objfile
, enum language language
)
2352 struct gdbarch
*gdbarch
= objfile
->arch ();
2353 struct context_stack
*newobj
;
2354 struct context_stack cstk
;
2355 /* This remembers the address of the start of a function. It is
2356 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2357 are relative to the current function's start address. On systems
2358 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2359 and is used to relocate these symbol types rather than
2361 static CORE_ADDR function_start_offset
;
2363 /* This holds the address of the start of a function, without the
2364 system peculiarities of function_start_offset. */
2365 static CORE_ADDR last_function_start
;
2367 /* If this is nonzero, we've seen an N_SLINE since the start of the
2368 current function. We use this to tell us to move the first sline
2369 to the beginning of the function regardless of what its given
2371 static int sline_found_in_function
= 1;
2373 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2374 source file. Used to detect the SunPRO solaris compiler. */
2375 static int n_opt_found
;
2377 /* Something is wrong if we see real data before seeing a source
2380 if (get_last_source_file () == NULL
&& type
!= (unsigned char) N_SO
)
2382 /* Ignore any symbols which appear before an N_SO symbol.
2383 Currently no one puts symbols there, but we should deal
2384 gracefully with the case. A complain()t might be in order,
2385 but this should not be an error (). */
2394 if (*name
== '\000')
2396 /* This N_FUN marks the end of a function. This closes off
2397 the current block. */
2398 struct block
*block
;
2400 if (outermost_context_p ())
2402 lbrac_mismatch_complaint (symnum
);
2406 /* The following check is added before recording line 0 at
2407 end of function so as to handle hand-generated stabs
2408 which may have an N_FUN stabs at the end of the function,
2409 but no N_SLINE stabs. */
2410 if (sline_found_in_function
)
2412 CORE_ADDR addr
= last_function_start
+ valu
;
2414 record_line (get_current_subfile (), 0,
2415 gdbarch_addr_bits_remove (gdbarch
, addr
));
2418 within_function
= 0;
2419 cstk
= pop_context ();
2421 /* Make a block for the local symbols within. */
2422 block
= finish_block (cstk
.name
,
2423 cstk
.old_blocks
, NULL
,
2424 cstk
.start_addr
, cstk
.start_addr
+ valu
);
2426 /* For C++, set the block's scope. */
2427 if (cstk
.name
->language () == language_cplus
)
2428 cp_set_block_scope (cstk
.name
, block
, &objfile
->objfile_obstack
);
2430 /* May be switching to an assembler file which may not be using
2431 block relative stabs, so reset the offset. */
2432 function_start_offset
= 0;
2437 sline_found_in_function
= 0;
2439 /* Relocate for dynamic loading. */
2440 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2441 valu
= gdbarch_addr_bits_remove (gdbarch
, valu
);
2442 last_function_start
= valu
;
2444 goto define_a_symbol
;
2447 /* This "symbol" just indicates the start of an inner lexical
2448 context within a function. */
2450 /* Ignore extra outermost context from SunPRO cc and acc. */
2451 if (n_opt_found
&& desc
== 1)
2454 valu
+= function_start_offset
;
2456 push_context (desc
, valu
);
2460 /* This "symbol" just indicates the end of an inner lexical
2461 context that was started with N_LBRAC. */
2463 /* Ignore extra outermost context from SunPRO cc and acc. */
2464 if (n_opt_found
&& desc
== 1)
2467 valu
+= function_start_offset
;
2469 if (outermost_context_p ())
2471 lbrac_mismatch_complaint (symnum
);
2475 cstk
= pop_context ();
2476 if (desc
!= cstk
.depth
)
2477 lbrac_mismatch_complaint (symnum
);
2479 if (*get_local_symbols () != NULL
)
2481 /* GCC development snapshots from March to December of
2482 2000 would output N_LSYM entries after N_LBRAC
2483 entries. As a consequence, these symbols are simply
2484 discarded. Complain if this is the case. */
2485 complaint (_("misplaced N_LBRAC entry; discarding local "
2486 "symbols which have no enclosing block"));
2488 *get_local_symbols () = cstk
.locals
;
2490 if (get_context_stack_depth () > 1)
2492 /* This is not the outermost LBRAC...RBRAC pair in the
2493 function, its local symbols preceded it, and are the ones
2494 just recovered from the context stack. Define the block
2495 for them (but don't bother if the block contains no
2496 symbols. Should we complain on blocks without symbols?
2497 I can't think of any useful purpose for them). */
2498 if (*get_local_symbols () != NULL
)
2500 /* Muzzle a compiler bug that makes end < start.
2502 ??? Which compilers? Is this ever harmful?. */
2503 if (cstk
.start_addr
> valu
)
2505 complaint (_("block start larger than block end"));
2506 cstk
.start_addr
= valu
;
2508 /* Make a block for the local symbols within. */
2509 finish_block (0, cstk
.old_blocks
, NULL
,
2510 cstk
.start_addr
, valu
);
2515 /* This is the outermost LBRAC...RBRAC pair. There is no
2516 need to do anything; leave the symbols that preceded it
2517 to be attached to the function's own block. We need to
2518 indicate that we just moved outside of the function. */
2519 within_function
= 0;
2526 /* This kind of symbol indicates the start of an object file.
2527 Relocate for dynamic loading. */
2528 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2532 /* This type of symbol indicates the start of data for one
2533 source file. Finish the symbol table of the previous source
2534 file (if any) and start accumulating a new symbol table.
2535 Relocate for dynamic loading. */
2536 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2540 if (get_last_source_file ())
2542 /* Check if previous symbol was also an N_SO (with some
2543 sanity checks). If so, that one was actually the
2544 directory name, and the current one is the real file
2545 name. Patch things up. */
2546 if (previous_stab_code
== (unsigned char) N_SO
)
2548 patch_subfile_names (get_current_subfile (), name
);
2549 break; /* Ignore repeated SOs. */
2551 end_symtab (valu
, SECT_OFF_TEXT (objfile
));
2555 /* Null name means this just marks the end of text for this .o
2556 file. Don't start a new symtab in this case. */
2557 if (*name
== '\000')
2560 function_start_offset
= 0;
2563 start_symtab (objfile
, name
, NULL
, valu
, language
);
2564 record_debugformat ("stabs");
2568 /* This type of symbol indicates the start of data for a
2569 sub-source-file, one whose contents were copied or included
2570 in the compilation of the main source file (whose name was
2571 given in the N_SO symbol). Relocate for dynamic loading. */
2572 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2573 start_subfile (name
);
2578 add_new_header_file (name
, valu
);
2579 start_subfile (name
);
2583 start_subfile (pop_subfile ());
2587 add_old_header_file (name
, valu
);
2591 /* This type of "symbol" really just records one line-number --
2592 core-address correspondence. Enter it in the line list for
2593 this symbol table. */
2595 /* Relocate for dynamic loading and for ELF acc
2596 function-relative symbols. */
2597 valu
+= function_start_offset
;
2599 /* GCC 2.95.3 emits the first N_SLINE stab somewhere in the
2600 middle of the prologue instead of right at the start of the
2601 function. To deal with this we record the address for the
2602 first N_SLINE stab to be the start of the function instead of
2603 the listed location. We really shouldn't to this. When
2604 compiling with optimization, this first N_SLINE stab might be
2605 optimized away. Other (non-GCC) compilers don't emit this
2606 stab at all. There is no real harm in having an extra
2607 numbered line, although it can be a bit annoying for the
2608 user. However, it totally screws up our testsuite.
2610 So for now, keep adjusting the address of the first N_SLINE
2611 stab, but only for code compiled with GCC. */
2613 if (within_function
&& sline_found_in_function
== 0)
2615 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
2616 last_function_start
: valu
;
2618 record_line (get_current_subfile (), desc
,
2619 gdbarch_addr_bits_remove (gdbarch
, addr
));
2620 sline_found_in_function
= 1;
2623 record_line (get_current_subfile (), desc
,
2624 gdbarch_addr_bits_remove (gdbarch
, valu
));
2628 common_block_start (name
, objfile
);
2632 common_block_end (objfile
);
2635 /* The following symbol types need to have the appropriate
2636 offset added to their value; then we process symbol
2637 definitions in the name. */
2639 case N_STSYM
: /* Static symbol in data segment. */
2640 case N_LCSYM
: /* Static symbol in BSS segment. */
2641 case N_ROSYM
: /* Static symbol in read-only data segment. */
2642 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2643 Solaris 2's stabs-in-elf makes *most* symbols relative but
2644 leaves a few absolute (at least for Solaris 2.1 and version
2645 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
2646 the fence. .stab "foo:S...",N_STSYM is absolute (ld
2647 relocates it) .stab "foo:V...",N_STSYM is relative (section
2648 base subtracted). This leaves us no choice but to search for
2649 the 'S' or 'V'... (or pass the whole section_offsets stuff
2650 down ONE MORE function call level, which we really don't want
2655 /* Normal object file and NLMs have non-zero text seg offsets,
2656 but don't need their static syms offset in this fashion.
2657 XXX - This is really a crock that should be fixed in the
2658 solib handling code so that I don't have to work around it
2661 if (!symfile_relocatable
)
2663 p
= strchr (name
, ':');
2664 if (p
!= 0 && p
[1] == 'S')
2666 /* The linker relocated it. We don't want to add a
2667 Sun-stabs Tfoo.foo-like offset, but we *do*
2668 want to add whatever solib.c passed to
2669 symbol_file_add as addr (this is known to affect
2670 SunOS 4, and I suspect ELF too). Since there is no
2671 Ttext.text symbol, we can get addr from the text offset. */
2672 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2673 goto define_a_symbol
;
2676 /* Since it's not the kludge case, re-dispatch to the right
2687 internal_error (__FILE__
, __LINE__
,
2688 _("failed internal consistency check"));
2692 case_N_STSYM
: /* Static symbol in data segment. */
2693 case N_DSLINE
: /* Source line number, data segment. */
2694 valu
+= section_offsets
[SECT_OFF_DATA (objfile
)];
2695 goto define_a_symbol
;
2697 case_N_LCSYM
: /* Static symbol in BSS segment. */
2698 case N_BSLINE
: /* Source line number, BSS segment. */
2699 /* N_BROWS: overlaps with N_BSLINE. */
2700 valu
+= section_offsets
[SECT_OFF_BSS (objfile
)];
2701 goto define_a_symbol
;
2703 case_N_ROSYM
: /* Static symbol in read-only data segment. */
2704 valu
+= section_offsets
[SECT_OFF_RODATA (objfile
)];
2705 goto define_a_symbol
;
2707 case N_ENTRY
: /* Alternate entry point. */
2708 /* Relocate for dynamic loading. */
2709 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2710 goto define_a_symbol
;
2712 /* The following symbol types we don't know how to process.
2713 Handle them in a "default" way, but complain to people who
2716 case N_CATCH
: /* Exception handler catcher. */
2717 case N_EHDECL
: /* Exception handler name. */
2718 case N_PC
: /* Global symbol in Pascal. */
2719 case N_M2C
: /* Modula-2 compilation unit. */
2720 /* N_MOD2: overlaps with N_EHDECL. */
2721 case N_SCOPE
: /* Modula-2 scope information. */
2722 case N_ECOML
: /* End common (local name). */
2723 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
2728 unknown_symtype_complaint (hex_string (type
));
2732 /* These symbol types don't need the address field relocated,
2733 since it is either unused, or is absolute. */
2734 case N_GSYM
: /* Global variable. */
2735 case N_NSYMS
: /* Number of symbols (Ultrix). */
2736 case N_NOMAP
: /* No map? (Ultrix). */
2737 case N_RSYM
: /* Register variable. */
2738 case N_DEFD
: /* Modula-2 GNU module dependency. */
2739 case N_SSYM
: /* Struct or union element. */
2740 case N_LSYM
: /* Local symbol in stack. */
2741 case N_PSYM
: /* Parameter variable. */
2742 case N_LENG
: /* Length of preceding symbol type. */
2746 const char *colon_pos
= strchr (name
, ':');
2748 if (colon_pos
== NULL
)
2751 deftype
= colon_pos
[1];
2757 /* Deal with the SunPRO 3.0 compiler which omits the
2758 address from N_FUN symbols. */
2760 && valu
== section_offsets
[SECT_OFF_TEXT (objfile
)]
2761 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2763 struct bound_minimal_symbol minsym
2764 = find_stab_function (name
, get_last_source_file (),
2766 if (minsym
.minsym
!= NULL
)
2767 valu
= BMSYMBOL_VALUE_ADDRESS (minsym
);
2770 /* These addresses are absolute. */
2771 function_start_offset
= valu
;
2773 within_function
= 1;
2775 if (get_context_stack_depth () > 1)
2777 complaint (_("unmatched N_LBRAC before symtab pos %d"),
2782 if (!outermost_context_p ())
2784 struct block
*block
;
2786 cstk
= pop_context ();
2787 /* Make a block for the local symbols within. */
2788 block
= finish_block (cstk
.name
,
2789 cstk
.old_blocks
, NULL
,
2790 cstk
.start_addr
, valu
);
2792 /* For C++, set the block's scope. */
2793 if (cstk
.name
->language () == language_cplus
)
2794 cp_set_block_scope (cstk
.name
, block
,
2795 &objfile
->objfile_obstack
);
2798 newobj
= push_context (0, valu
);
2799 newobj
->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
2803 define_symbol (valu
, name
, desc
, type
, objfile
);
2809 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2810 for a bunch of other flags, too. Someday we may parse their
2811 flags; for now we ignore theirs and hope they'll ignore ours. */
2812 case N_OPT
: /* Solaris 2: Compiler options. */
2815 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2817 processing_gcc_compilation
= 2;
2824 case N_MAIN
: /* Name of main routine. */
2825 /* FIXME: If one has a symbol file with N_MAIN and then replaces
2826 it with a symbol file with "main" and without N_MAIN. I'm
2827 not sure exactly what rule to follow but probably something
2828 like: N_MAIN takes precedence over "main" no matter what
2829 objfile it is in; If there is more than one N_MAIN, choose
2830 the one in the symfile_objfile; If there is more than one
2831 N_MAIN within a given objfile, complain() and choose
2832 arbitrarily. (kingdon) */
2834 set_objfile_main_name (objfile
, name
, language_unknown
);
2837 /* The following symbol types can be ignored. */
2838 case N_OBJ
: /* Solaris 2: Object file dir and name. */
2839 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
2840 /* N_UNDF: Solaris 2: File separator mark. */
2841 /* N_UNDF: -- we will never encounter it, since we only process
2842 one file's symbols at once. */
2843 case N_ENDM
: /* Solaris 2: End of module. */
2844 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2848 /* '#' is a GNU C extension to allow one symbol to refer to another
2851 Generally this is used so that an alias can refer to its main
2856 /* Initialize symbol reference names and determine if this is a
2857 definition. If a symbol reference is being defined, go ahead
2858 and add it. Otherwise, just return. */
2860 const char *s
= name
;
2863 /* If this stab defines a new reference ID that is not on the
2864 reference list, then put it on the reference list.
2866 We go ahead and advance NAME past the reference, even though
2867 it is not strictly necessary at this time. */
2868 refnum
= symbol_reference_defined (&s
);
2870 if (!ref_search (refnum
))
2871 ref_add (refnum
, 0, name
, valu
);
2875 previous_stab_code
= type
;
2878 /* FIXME: The only difference between this and elfstab_build_psymtabs
2879 is the call to install_minimal_symbols for elf, and the support for
2880 split sections. If the differences are really that small, the code
2881 should be shared. */
2883 /* Scan and build partial symbols for an coff symbol file.
2884 The coff file has already been processed to get its minimal symbols.
2886 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2889 OBJFILE is the object file we are reading symbols from.
2890 ADDR is the address relative to which the symbols are (e.g.
2891 the base address of the text segment).
2892 TEXTADDR is the address of the text section.
2893 TEXTSIZE is the size of the text section.
2894 STABSECTS is the list of .stab sections in OBJFILE.
2895 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2896 .stabstr section exists.
2898 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2899 adjusted for coff details. */
2902 coffstab_build_psymtabs (struct objfile
*objfile
,
2903 CORE_ADDR textaddr
, unsigned int textsize
,
2904 const std::vector
<asection
*> &stabsects
,
2905 file_ptr stabstroffset
, unsigned int stabstrsize
)
2908 bfd
*sym_bfd
= objfile
->obfd
;
2909 const char *name
= bfd_get_filename (sym_bfd
);
2910 unsigned int stabsize
;
2912 /* Allocate struct to keep track of stab reading. */
2913 dbx_objfile_data_key
.emplace (objfile
);
2915 DBX_TEXT_ADDR (objfile
) = textaddr
;
2916 DBX_TEXT_SIZE (objfile
) = textsize
;
2918 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2919 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
2920 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2922 if (stabstrsize
> bfd_get_size (sym_bfd
))
2923 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
2924 DBX_STRINGTAB (objfile
) = (char *)
2925 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
2926 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
2928 /* Now read in the string table in one big gulp. */
2930 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2932 perror_with_name (name
);
2933 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
2934 if (val
!= stabstrsize
)
2935 perror_with_name (name
);
2937 stabsread_new_init ();
2938 free_header_files ();
2939 init_header_files ();
2941 processing_acc_compilation
= 1;
2943 /* In a coff file, we've already installed the minimal symbols that came
2944 from the coff (non-stab) symbol table, so always act like an
2945 incremental load here. */
2946 scoped_restore save_symbuf_sections
2947 = make_scoped_restore (&symbuf_sections
);
2948 if (stabsects
.size () == 1)
2950 stabsize
= bfd_section_size (stabsects
[0]);
2951 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2952 DBX_SYMTAB_OFFSET (objfile
) = stabsects
[0]->filepos
;
2956 DBX_SYMCOUNT (objfile
) = 0;
2957 for (asection
*section
: stabsects
)
2959 stabsize
= bfd_section_size (section
);
2960 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2963 DBX_SYMTAB_OFFSET (objfile
) = stabsects
[0]->filepos
;
2966 symbuf_sections
= &stabsects
;
2967 symbuf_left
= bfd_section_size (stabsects
[0]);
2971 dbx_symfile_read (objfile
, 0);
2974 /* Scan and build partial symbols for an ELF symbol file.
2975 This ELF file has already been processed to get its minimal symbols.
2977 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2980 OBJFILE is the object file we are reading symbols from.
2981 ADDR is the address relative to which the symbols are (e.g.
2982 the base address of the text segment).
2983 STABSECT is the BFD section information for the .stab section.
2984 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2985 .stabstr section exists.
2987 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2988 adjusted for elf details. */
2991 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
2992 file_ptr stabstroffset
, unsigned int stabstrsize
)
2995 bfd
*sym_bfd
= objfile
->obfd
;
2996 const char *name
= bfd_get_filename (sym_bfd
);
2998 stabsread_new_init ();
3000 /* Allocate struct to keep track of stab reading. */
3001 dbx_objfile_data_key
.emplace (objfile
);
3003 /* Find the first and last text address. dbx_symfile_read seems to
3005 find_text_range (sym_bfd
, objfile
);
3007 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3008 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3009 DBX_SYMCOUNT (objfile
)
3010 = bfd_section_size (stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3011 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3012 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3013 DBX_STAB_SECTION (objfile
) = stabsect
;
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;
3037 symbuf_left
= bfd_section_size (stabsect
);
3039 scoped_restore restore_stabs_data
= make_scoped_restore (&stabs_data
);
3040 gdb::unique_xmalloc_ptr
<gdb_byte
> data_holder
;
3042 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3044 data_holder
.reset (stabs_data
);
3046 /* In an elf file, we've already installed the minimal symbols that came
3047 from the elf (non-stab) symbol table, so always act like an
3048 incremental load here. dbx_symfile_read should not generate any new
3049 minimal symbols, since we will have already read the ELF dynamic symbol
3050 table and normal symbol entries won't be in the ".stab" section; but in
3051 case it does, it will install them itself. */
3052 dbx_symfile_read (objfile
, 0);
3055 /* Scan and build partial symbols for a file with special sections for stabs
3056 and stabstrings. The file has already been processed to get its minimal
3057 symbols, and any other symbols that might be necessary to resolve GSYMs.
3059 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3062 OBJFILE is the object file we are reading symbols from.
3063 ADDR is the address relative to which the symbols are (e.g. the base address
3064 of the text segment).
3065 STAB_NAME is the name of the section that contains the stabs.
3066 STABSTR_NAME is the name of the section that contains the stab strings.
3068 This routine is mostly copied from dbx_symfile_init and
3069 dbx_symfile_read. */
3072 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3073 char *stabstr_name
, char *text_name
)
3076 bfd
*sym_bfd
= objfile
->obfd
;
3077 const char *name
= bfd_get_filename (sym_bfd
);
3079 asection
*stabstrsect
;
3080 asection
*text_sect
;
3082 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3083 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3089 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3090 "but not string section (%s)"),
3091 stab_name
, stabstr_name
);
3093 dbx_objfile_data_key
.emplace (objfile
);
3095 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3097 error (_("Can't find %s section in symbol file"), text_name
);
3098 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (text_sect
);
3099 DBX_TEXT_SIZE (objfile
) = bfd_section_size (text_sect
);
3101 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3102 DBX_SYMCOUNT (objfile
) = bfd_section_size (stabsect
)
3103 / DBX_SYMBOL_SIZE (objfile
);
3104 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (stabstrsect
);
3105 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING
3109 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3110 error (_("ridiculous string table size: %d bytes"),
3111 DBX_STRINGTAB_SIZE (objfile
));
3112 DBX_STRINGTAB (objfile
) = (char *)
3113 obstack_alloc (&objfile
->objfile_obstack
,
3114 DBX_STRINGTAB_SIZE (objfile
) + 1);
3115 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3117 /* Now read in the string table in one big gulp. */
3119 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3120 stabstrsect
, /* bfd section */
3121 DBX_STRINGTAB (objfile
), /* input buffer */
3122 0, /* offset into section */
3123 DBX_STRINGTAB_SIZE (objfile
)); /* amount to
3127 perror_with_name (name
);
3129 stabsread_new_init ();
3130 free_header_files ();
3131 init_header_files ();
3133 /* Now, do an incremental load. */
3135 processing_acc_compilation
= 1;
3136 dbx_symfile_read (objfile
, 0);
3139 static const struct sym_fns aout_sym_fns
=
3141 dbx_new_init
, /* init anything gbl to entire symtab */
3142 dbx_symfile_init
, /* read initial info, setup for sym_read() */
3143 dbx_symfile_read
, /* read a symbol file into symtab */
3144 dbx_symfile_finish
, /* finished with file, cleanup */
3145 default_symfile_offsets
, /* parse user's offsets to internal form */
3146 default_symfile_segments
, /* Get segment information from a file. */
3148 default_symfile_relocate
, /* Relocate a debug section. */
3149 NULL
, /* sym_probe_fns */
3152 void _initialize_dbxread ();
3154 _initialize_dbxread ()
3156 add_symtab_fns (bfd_target_aout_flavour
, &aout_sym_fns
);