1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2020 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_psymtab_to_symtab_1 (legacy_psymtab
*, struct objfile
*);
273 static void read_dbx_symtab (minimal_symbol_reader
&, struct objfile
*);
275 static legacy_psymtab
*find_corresponding_bincl_psymtab (const char *,
278 static const char *dbx_next_symbol_text (struct objfile
*);
280 static void fill_symbuf (bfd
*);
282 static void dbx_symfile_init (struct objfile
*);
284 static void dbx_new_init (struct objfile
*);
286 static void dbx_symfile_read (struct objfile
*, symfile_add_flags
);
288 static void dbx_symfile_finish (struct objfile
*);
290 static void record_minimal_symbol (minimal_symbol_reader
&,
291 const char *, CORE_ADDR
, int,
294 static void add_new_header_file (const char *, int);
296 static void add_old_header_file (const char *, int);
298 static void add_this_object_header_file (int);
300 static legacy_psymtab
*start_psymtab (struct objfile
*, const char *,
303 /* Free up old header file tables. */
306 free_header_files (void)
308 if (this_object_header_files
)
310 xfree (this_object_header_files
);
311 this_object_header_files
= NULL
;
313 n_allocated_this_object_header_files
= 0;
316 /* Allocate new header file tables. */
319 init_header_files (void)
321 n_allocated_this_object_header_files
= 10;
322 this_object_header_files
= XNEWVEC (int, 10);
325 /* Add header file number I for this object file
326 at the next successive FILENUM. */
329 add_this_object_header_file (int i
)
331 if (n_this_object_header_files
== n_allocated_this_object_header_files
)
333 n_allocated_this_object_header_files
*= 2;
334 this_object_header_files
335 = (int *) xrealloc ((char *) this_object_header_files
,
336 n_allocated_this_object_header_files
* sizeof (int));
339 this_object_header_files
[n_this_object_header_files
++] = i
;
342 /* Add to this file an "old" header file, one already seen in
343 a previous object file. NAME is the header file's name.
344 INSTANCE is its instance code, to select among multiple
345 symbol tables for the same header file. */
348 add_old_header_file (const char *name
, int instance
)
350 struct header_file
*p
= HEADER_FILES (dbxread_objfile
);
353 for (i
= 0; i
< N_HEADER_FILES (dbxread_objfile
); i
++)
354 if (filename_cmp (p
[i
].name
, name
) == 0 && instance
== p
[i
].instance
)
356 add_this_object_header_file (i
);
359 repeated_header_complaint (name
, symnum
);
362 /* Add to this file a "new" header file: definitions for its types follow.
363 NAME is the header file's name.
364 Most often this happens only once for each distinct header file,
365 but not necessarily. If it happens more than once, INSTANCE has
366 a different value each time, and references to the header file
367 use INSTANCE values to select among them.
369 dbx output contains "begin" and "end" markers for each new header file,
370 but at this level we just need to know which files there have been;
371 so we record the file when its "begin" is seen and ignore the "end". */
374 add_new_header_file (const char *name
, int instance
)
377 struct header_file
*hfile
;
379 /* Make sure there is room for one more header file. */
381 i
= N_ALLOCATED_HEADER_FILES (dbxread_objfile
);
383 if (N_HEADER_FILES (dbxread_objfile
) == i
)
387 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = 10;
388 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
389 xmalloc (10 * sizeof (struct header_file
));
394 N_ALLOCATED_HEADER_FILES (dbxread_objfile
) = i
;
395 HEADER_FILES (dbxread_objfile
) = (struct header_file
*)
396 xrealloc ((char *) HEADER_FILES (dbxread_objfile
),
397 (i
* sizeof (struct header_file
)));
401 /* Create an entry for this header file. */
403 i
= N_HEADER_FILES (dbxread_objfile
)++;
404 hfile
= HEADER_FILES (dbxread_objfile
) + i
;
405 hfile
->name
= xstrdup (name
);
406 hfile
->instance
= instance
;
408 hfile
->vector
= XCNEWVEC (struct type
*, 10);
410 add_this_object_header_file (i
);
414 static struct type
**
415 explicit_lookup_type (int real_filenum
, int index
)
417 struct header_file
*f
= &HEADER_FILES (dbxread_objfile
)[real_filenum
];
419 if (index
>= f
->length
)
422 f
->vector
= (struct type
**)
423 xrealloc (f
->vector
, f
->length
* sizeof (struct type
*));
424 memset (&f
->vector
[f
->length
/ 2],
425 '\0', f
->length
* sizeof (struct type
*) / 2);
427 return &f
->vector
[index
];
432 record_minimal_symbol (minimal_symbol_reader
&reader
,
433 const char *name
, CORE_ADDR address
, int type
,
434 struct objfile
*objfile
)
436 enum minimal_symbol_type ms_type
;
443 section
= SECT_OFF_TEXT (objfile
);
447 section
= SECT_OFF_DATA (objfile
);
451 section
= SECT_OFF_BSS (objfile
);
460 section
= SECT_OFF_DATA (objfile
);
463 /* I don't think this type actually exists; since a N_SETV is the result
464 of going over many .o files, it doesn't make sense to have one
466 ms_type
= mst_file_data
;
467 section
= SECT_OFF_DATA (objfile
);
474 ms_type
= mst_file_text
;
475 section
= SECT_OFF_TEXT (objfile
);
478 ms_type
= mst_file_data
;
480 /* Check for __DYNAMIC, which is used by Sun shared libraries.
481 Record it as global even if it's local, not global, so
482 lookup_minimal_symbol can find it. We don't check symbol_leading_char
483 because for SunOS4 it always is '_'. */
484 if (name
[8] == 'C' && strcmp ("__DYNAMIC", name
) == 0)
487 /* Same with virtual function tables, both global and static. */
489 const char *tempstring
= name
;
491 if (tempstring
[0] == bfd_get_symbol_leading_char (objfile
->obfd
))
493 if (is_vtable_name (tempstring
))
496 section
= SECT_OFF_DATA (objfile
);
499 ms_type
= mst_file_bss
;
500 section
= SECT_OFF_BSS (objfile
);
503 ms_type
= mst_unknown
;
508 if ((ms_type
== mst_file_text
|| ms_type
== mst_text
)
509 && address
< lowest_text_address
)
510 lowest_text_address
= address
;
512 reader
.record_with_info (name
, address
, ms_type
, section
);
515 /* Scan and build partial symbols for a symbol file.
516 We have been initialized by a call to dbx_symfile_init, which
517 put all the relevant info into a "struct dbx_symfile_info",
518 hung off the objfile structure. */
521 dbx_symfile_read (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
526 sym_bfd
= objfile
->obfd
;
528 /* .o and .nlm files are relocatables with text, data and bss segs based at
529 0. This flag disables special (Solaris stabs-in-elf only) fixups for
530 symbols with a value of 0. */
532 symfile_relocatable
= bfd_get_file_flags (sym_bfd
) & HAS_RELOC
;
534 val
= bfd_seek (sym_bfd
, DBX_SYMTAB_OFFSET (objfile
), SEEK_SET
);
536 perror_with_name (objfile_name (objfile
));
538 /* Size the symbol table. */
539 init_psymbol_list (objfile
, DBX_SYMCOUNT (objfile
));
541 symbol_size
= DBX_SYMBOL_SIZE (objfile
);
542 symbol_table_offset
= DBX_SYMTAB_OFFSET (objfile
);
544 scoped_free_pendings free_pending
;
546 minimal_symbol_reader
reader (objfile
);
548 /* Read stabs data from executable file and define symbols. */
550 read_dbx_symtab (reader
, objfile
);
552 /* Install any minimal symbols that have been collected as the current
553 minimal symbols for this objfile. */
558 /* Initialize anything that needs initializing when a completely new
559 symbol file is specified (not just adding some symbols from another
560 file, e.g. a shared library). */
563 dbx_new_init (struct objfile
*ignore
)
565 stabsread_new_init ();
566 init_header_files ();
570 /* dbx_symfile_init ()
571 is the dbx-specific initialization routine for reading symbols.
572 It is passed a struct objfile which contains, among other things,
573 the BFD for the file whose symbols are being read, and a slot for a pointer
574 to "private data" which we fill with goodies.
576 We read the string table into malloc'd space and stash a pointer to it.
578 Since BFD doesn't know how to read debug symbols in a format-independent
579 way (and may never do so...), we have to do it ourselves. We will never
580 be called unless this is an a.out (or very similar) file.
581 FIXME, there should be a cleaner peephole into the BFD environment here. */
583 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
586 dbx_symfile_init (struct objfile
*objfile
)
589 bfd
*sym_bfd
= objfile
->obfd
;
590 const char *name
= bfd_get_filename (sym_bfd
);
592 unsigned char size_temp
[DBX_STRINGTAB_SIZE_SIZE
];
594 /* Allocate struct to keep track of the symfile. */
595 dbx_objfile_data_key
.emplace (objfile
);
597 DBX_TEXT_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".text");
598 DBX_DATA_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".data");
599 DBX_BSS_SECTION (objfile
) = bfd_get_section_by_name (sym_bfd
, ".bss");
601 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
602 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
603 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
605 /* FIXME POKING INSIDE BFD DATA STRUCTURES. */
607 text_sect
= bfd_get_section_by_name (sym_bfd
, ".text");
609 error (_("Can't find .text section in symbol file"));
610 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (text_sect
);
611 DBX_TEXT_SIZE (objfile
) = bfd_section_size (text_sect
);
613 DBX_SYMBOL_SIZE (objfile
) = obj_symbol_entry_size (sym_bfd
);
614 DBX_SYMCOUNT (objfile
) = bfd_get_symcount (sym_bfd
);
615 DBX_SYMTAB_OFFSET (objfile
) = SYMBOL_TABLE_OFFSET
;
617 /* Read the string table and stash it away in the objfile_obstack.
618 When we blow away the objfile the string table goes away as well.
619 Note that gdb used to use the results of attempting to malloc the
620 string table, based on the size it read, as a form of sanity check
621 for botched byte swapping, on the theory that a byte swapped string
622 table size would be so totally bogus that the malloc would fail. Now
623 that we put in on the objfile_obstack, we can't do this since gdb gets
624 a fatal error (out of virtual memory) if the size is bogus. We can
625 however at least check to see if the size is less than the size of
626 the size field itself, or larger than the size of the entire file.
627 Note that all valid string tables have a size greater than zero, since
628 the bytes used to hold the size are included in the count. */
630 if (STRING_TABLE_OFFSET
== 0)
632 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
633 will never be zero, even when there is no string table. This
634 would appear to be a bug in bfd. */
635 DBX_STRINGTAB_SIZE (objfile
) = 0;
636 DBX_STRINGTAB (objfile
) = NULL
;
640 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
642 perror_with_name (name
);
644 memset (size_temp
, 0, sizeof (size_temp
));
645 val
= bfd_bread (size_temp
, sizeof (size_temp
), sym_bfd
);
648 perror_with_name (name
);
652 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
653 EOF if there is no string table, and attempting to read the size
654 from EOF will read zero bytes. */
655 DBX_STRINGTAB_SIZE (objfile
) = 0;
656 DBX_STRINGTAB (objfile
) = NULL
;
660 /* Read some data that would appear to be the string table size.
661 If there really is a string table, then it is probably the right
662 size. Byteswap if necessary and validate the size. Note that
663 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
664 random data that happened to be at STRING_TABLE_OFFSET, because
665 bfd can't tell us there is no string table, the sanity checks may
666 or may not catch this. */
667 DBX_STRINGTAB_SIZE (objfile
) = bfd_h_get_32 (sym_bfd
, size_temp
);
669 if (DBX_STRINGTAB_SIZE (objfile
) < sizeof (size_temp
)
670 || DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
671 error (_("ridiculous string table size (%d bytes)."),
672 DBX_STRINGTAB_SIZE (objfile
));
674 DBX_STRINGTAB (objfile
) =
675 (char *) obstack_alloc (&objfile
->objfile_obstack
,
676 DBX_STRINGTAB_SIZE (objfile
));
677 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
));
679 /* Now read in the string table in one big gulp. */
681 val
= bfd_seek (sym_bfd
, STRING_TABLE_OFFSET
, SEEK_SET
);
683 perror_with_name (name
);
684 val
= bfd_bread (DBX_STRINGTAB (objfile
),
685 DBX_STRINGTAB_SIZE (objfile
),
687 if (val
!= DBX_STRINGTAB_SIZE (objfile
))
688 perror_with_name (name
);
693 /* Perform any local cleanups required when we are done with a particular
694 objfile. I.E, we are in the process of discarding all symbol information
695 for an objfile, freeing up all memory held for it, and unlinking the
696 objfile struct from the global list of known objfiles. */
699 dbx_symfile_finish (struct objfile
*objfile
)
701 free_header_files ();
704 dbx_symfile_info::~dbx_symfile_info ()
706 if (header_files
!= NULL
)
708 int i
= n_header_files
;
709 struct header_file
*hfiles
= header_files
;
713 xfree (hfiles
[i
].name
);
714 xfree (hfiles
[i
].vector
);
722 /* Buffer for reading the symbol table entries. */
723 static struct external_nlist symbuf
[4096];
724 static int symbuf_idx
;
725 static int symbuf_end
;
727 /* Name of last function encountered. Used in Solaris to approximate
728 object file boundaries. */
729 static const char *last_function_name
;
731 /* The address in memory of the string table of the object file we are
732 reading (which might not be the "main" object file, but might be a
733 shared library or some other dynamically loaded thing). This is
734 set by read_dbx_symtab when building psymtabs, and by
735 read_ofile_symtab when building symtabs, and is used only by
736 next_symbol_text. FIXME: If that is true, we don't need it when
737 building psymtabs, right? */
738 static char *stringtab_global
;
740 /* These variables are used to control fill_symbuf when the stabs
741 symbols are not contiguous (as may be the case when a COFF file is
742 linked using --split-by-reloc). */
743 static const std::vector
<asection
*> *symbuf_sections
;
744 static size_t sect_idx
;
745 static unsigned int symbuf_left
;
746 static unsigned int symbuf_read
;
748 /* This variable stores a global stabs buffer, if we read stabs into
749 memory in one chunk in order to process relocations. */
750 static bfd_byte
*stabs_data
;
752 /* Refill the symbol table input buffer
753 and set the variables that control fetching entries from it.
754 Reports an error if no data available.
755 This function can read past the end of the symbol table
756 (into the string table) but this does no harm. */
759 fill_symbuf (bfd
*sym_bfd
)
766 nbytes
= sizeof (symbuf
);
767 if (nbytes
> symbuf_left
)
768 nbytes
= symbuf_left
;
769 memcpy (symbuf
, stabs_data
+ symbuf_read
, nbytes
);
771 else if (symbuf_sections
== NULL
)
773 count
= sizeof (symbuf
);
774 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
778 if (symbuf_left
<= 0)
780 file_ptr filepos
= (*symbuf_sections
)[sect_idx
]->filepos
;
782 if (bfd_seek (sym_bfd
, filepos
, SEEK_SET
) != 0)
783 perror_with_name (bfd_get_filename (sym_bfd
));
784 symbuf_left
= bfd_section_size ((*symbuf_sections
)[sect_idx
]);
785 symbol_table_offset
= filepos
- symbuf_read
;
790 if (count
> sizeof (symbuf
))
791 count
= sizeof (symbuf
);
792 nbytes
= bfd_bread (symbuf
, count
, sym_bfd
);
796 perror_with_name (bfd_get_filename (sym_bfd
));
797 else if (nbytes
== 0)
798 error (_("Premature end of file reading symbol table"));
799 symbuf_end
= nbytes
/ symbol_size
;
801 symbuf_left
-= nbytes
;
802 symbuf_read
+= nbytes
;
806 stabs_seek (int sym_offset
)
810 symbuf_read
+= sym_offset
;
811 symbuf_left
-= sym_offset
;
814 bfd_seek (symfile_bfd
, sym_offset
, SEEK_CUR
);
817 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
819 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
820 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
821 (intern).n_other = 0; \
822 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
823 if (bfd_get_sign_extend_vma (abfd)) \
824 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
826 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
829 /* Invariant: The symbol pointed to by symbuf_idx is the first one
830 that hasn't been swapped. Swap the symbol at the same time
831 that symbuf_idx is incremented. */
833 /* dbx allows the text of a symbol name to be continued into the
834 next symbol name! When such a continuation is encountered
835 (a \ at the end of the text of a name)
836 call this function to get the continuation. */
839 dbx_next_symbol_text (struct objfile
*objfile
)
841 struct internal_nlist nlist
;
843 if (symbuf_idx
== symbuf_end
)
844 fill_symbuf (symfile_bfd
);
847 INTERNALIZE_SYMBOL (nlist
, &symbuf
[symbuf_idx
], symfile_bfd
);
848 OBJSTAT (objfile
, n_stabs
++);
852 return nlist
.n_strx
+ stringtab_global
+ file_string_table_offset
;
856 /* Given a name, value pair, find the corresponding
857 bincl in the list. Return the partial symtab associated
858 with that header_file_location. */
860 static legacy_psymtab
*
861 find_corresponding_bincl_psymtab (const char *name
, int instance
)
863 for (const header_file_location
&bincl
: *bincl_list
)
864 if (bincl
.instance
== instance
865 && strcmp (name
, bincl
.name
) == 0)
868 repeated_header_complaint (name
, symnum
);
869 return (legacy_psymtab
*) 0;
872 /* Set namestring based on nlist. If the string table index is invalid,
873 give a fake name, and print a single error message per symbol file read,
874 rather than abort the symbol reading or flood the user with messages. */
877 set_namestring (struct objfile
*objfile
, const struct internal_nlist
*nlist
)
879 const char *namestring
;
881 if (nlist
->n_strx
+ file_string_table_offset
882 >= DBX_STRINGTAB_SIZE (objfile
)
883 || nlist
->n_strx
+ file_string_table_offset
< nlist
->n_strx
)
885 complaint (_("bad string table offset in symbol %d"),
887 namestring
= "<bad string table offset>";
890 namestring
= (nlist
->n_strx
+ file_string_table_offset
891 + DBX_STRINGTAB (objfile
));
895 static struct bound_minimal_symbol
896 find_stab_function (const char *namestring
, const char *filename
,
897 struct objfile
*objfile
)
899 struct bound_minimal_symbol msym
;
902 const char *colon
= strchr (namestring
, ':');
906 n
= colon
- namestring
;
908 char *p
= (char *) alloca (n
+ 2);
909 strncpy (p
, namestring
, n
);
912 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
913 if (msym
.minsym
== NULL
)
915 /* Sun Fortran appends an underscore to the minimal symbol name,
916 try again with an appended underscore if the minimal symbol
920 msym
= lookup_minimal_symbol (p
, filename
, objfile
);
923 if (msym
.minsym
== NULL
&& filename
!= NULL
)
925 /* Try again without the filename. */
927 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
929 if (msym
.minsym
== NULL
&& filename
!= NULL
)
931 /* And try again for Sun Fortran, but without the filename. */
934 msym
= lookup_minimal_symbol (p
, NULL
, objfile
);
941 function_outside_compilation_unit_complaint (const char *arg1
)
943 complaint (_("function `%s' appears to be defined "
944 "outside of all compilation units"),
948 /* Setup partial_symtab's describing each source file for which
949 debugging information is available. */
952 read_dbx_symtab (minimal_symbol_reader
&reader
, struct objfile
*objfile
)
954 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
955 struct external_nlist
*bufp
= 0; /* =0 avoids gcc -Wall glitch. */
956 struct internal_nlist nlist
;
959 const char *sym_name
;
962 const char *namestring
;
964 int past_first_source_file
= 0;
965 CORE_ADDR last_function_start
= 0;
970 /* Current partial symtab. */
973 /* List of current psymtab's include files. */
974 const char **psymtab_include_list
;
975 int includes_allocated
;
978 /* Index within current psymtab dependency list. */
979 legacy_psymtab
**dependency_list
;
980 int dependencies_used
, dependencies_allocated
;
982 text_addr
= DBX_TEXT_ADDR (objfile
);
983 text_size
= DBX_TEXT_SIZE (objfile
);
985 /* FIXME. We probably want to change stringtab_global rather than add this
986 while processing every symbol entry. FIXME. */
987 file_string_table_offset
= 0;
988 next_file_string_table_offset
= 0;
990 stringtab_global
= DBX_STRINGTAB (objfile
);
992 pst
= (legacy_psymtab
*) 0;
994 includes_allocated
= 30;
996 psymtab_include_list
= (const char **) alloca (includes_allocated
*
997 sizeof (const char *));
999 dependencies_allocated
= 30;
1000 dependencies_used
= 0;
1002 (legacy_psymtab
**) alloca (dependencies_allocated
*
1003 sizeof (legacy_psymtab
*));
1005 /* Init bincl list */
1006 std::vector
<struct header_file_location
> bincl_storage
;
1007 scoped_restore restore_bincl_global
1008 = make_scoped_restore (&bincl_list
, &bincl_storage
);
1010 set_last_source_file (NULL
);
1012 lowest_text_address
= (CORE_ADDR
) -1;
1014 symfile_bfd
= objfile
->obfd
; /* For next_text_symbol. */
1015 abfd
= objfile
->obfd
;
1016 symbuf_end
= symbuf_idx
= 0;
1017 next_symbol_text_func
= dbx_next_symbol_text
;
1018 textlow_not_set
= 1;
1019 has_line_numbers
= 0;
1021 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1022 to global and static variables. The stab for a global or static
1023 variable doesn't give us any indication of which section it's in,
1024 so we can't tell immediately which offset in
1025 objfile->section_offsets we should apply to the variable's
1028 We could certainly find out which section contains the variable
1029 by looking up the variable's unrelocated address with
1030 find_pc_section, but that would be expensive; this is the
1031 function that constructs the partial symbol tables by examining
1032 every symbol in the entire executable, and it's
1033 performance-critical. So that expense would not be welcome. I'm
1034 not sure what to do about this at the moment.
1036 What we have done for years is to simply assume that the .data
1037 section's offset is appropriate for all global and static
1038 variables. Recently, this was expanded to fall back to the .bss
1039 section's offset if there is no .data section, and then to the
1040 .rodata section's offset. */
1041 data_sect_index
= objfile
->sect_index_data
;
1042 if (data_sect_index
== -1)
1043 data_sect_index
= SECT_OFF_BSS (objfile
);
1044 if (data_sect_index
== -1)
1045 data_sect_index
= SECT_OFF_RODATA (objfile
);
1047 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1048 for the file to have no .data, no .bss, and no .text at all, if
1049 it also has no global or static variables. */
1051 for (symnum
= 0; symnum
< DBX_SYMCOUNT (objfile
); symnum
++)
1053 /* Get the symbol for this run and pull out some info. */
1054 QUIT
; /* Allow this to be interruptable. */
1055 if (symbuf_idx
== symbuf_end
)
1057 bufp
= &symbuf
[symbuf_idx
++];
1060 * Special case to speed up readin.
1062 if (bfd_h_get_8 (abfd
, bufp
->e_type
) == N_SLINE
)
1064 has_line_numbers
= 1;
1068 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
1069 OBJSTAT (objfile
, n_stabs
++);
1071 /* Ok. There is a lot of code duplicated in the rest of this
1072 switch statement (for efficiency reasons). Since I don't
1073 like duplicating code, I will do my penance here, and
1074 describe the code which is duplicated:
1076 *) The assignment to namestring.
1077 *) The call to strchr.
1078 *) The addition of a partial symbol the two partial
1079 symbol lists. This last is a large section of code, so
1080 I've imbedded it in the following macro. */
1082 switch (nlist
.n_type
)
1085 * Standard, external, non-debugger, symbols
1088 case N_TEXT
| N_EXT
:
1089 case N_NBTEXT
| N_EXT
:
1092 case N_DATA
| N_EXT
:
1093 case N_NBDATA
| N_EXT
:
1098 case N_NBBSS
| N_EXT
:
1099 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
1104 namestring
= set_namestring (objfile
, &nlist
);
1106 record_minimal_symbol (reader
, namestring
, nlist
.n_value
,
1107 nlist
.n_type
, objfile
); /* Always */
1110 /* Standard, local, non-debugger, symbols. */
1114 /* We need to be able to deal with both N_FN or N_TEXT,
1115 because we have no way of knowing whether the sys-supplied ld
1116 or GNU ld was used to make the executable. Sequents throw
1117 in another wrinkle -- they renumbered N_FN. */
1122 namestring
= set_namestring (objfile
, &nlist
);
1124 if ((namestring
[0] == '-' && namestring
[1] == 'l')
1125 || (namestring
[(nsl
= strlen (namestring
)) - 1] == 'o'
1126 && namestring
[nsl
- 2] == '.'))
1128 if (past_first_source_file
&& pst
1129 /* The gould NP1 uses low values for .o and -l symbols
1130 which are not the address. */
1131 && nlist
.n_value
>= pst
->raw_text_low ())
1133 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
,
1134 includes_used
, symnum
* symbol_size
,
1135 nlist
.n_value
> pst
->raw_text_high ()
1136 ? nlist
.n_value
: pst
->raw_text_high (),
1137 dependency_list
, dependencies_used
,
1139 pst
= (legacy_psymtab
*) 0;
1141 dependencies_used
= 0;
1142 has_line_numbers
= 0;
1145 past_first_source_file
= 1;
1154 case N_UNDF
| N_EXT
:
1155 /* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
1156 We used to rely on the target to tell us whether it knows
1157 where the symbol has been relocated to, but none of the
1158 target implementations actually provided that operation.
1159 So we just ignore the symbol, the same way we would do if
1160 we had a target-side symbol lookup which returned no match.
1162 All other symbols (with nlist.n_value == 0), are really
1163 undefined, and so we ignore them too. */
1167 if (processing_acc_compilation
&& nlist
.n_strx
== 1)
1169 /* Deal with relative offsets in the string table
1170 used in ELF+STAB under Solaris. If we want to use the
1171 n_strx field, which contains the name of the file,
1172 we must adjust file_string_table_offset *before* calling
1173 set_namestring(). */
1174 past_first_source_file
= 1;
1175 file_string_table_offset
= next_file_string_table_offset
;
1176 next_file_string_table_offset
=
1177 file_string_table_offset
+ nlist
.n_value
;
1178 if (next_file_string_table_offset
< file_string_table_offset
)
1179 error (_("string table offset backs up at %d"), symnum
);
1180 /* FIXME -- replace error() with complaint. */
1185 /* Lots of symbol types we can just ignore. */
1192 /* Keep going . . . */
1195 * Special symbol types for GNU
1198 case N_INDR
| N_EXT
:
1200 case N_SETA
| N_EXT
:
1202 case N_SETT
| N_EXT
:
1204 case N_SETD
| N_EXT
:
1206 case N_SETB
| N_EXT
:
1217 static int prev_so_symnum
= -10;
1218 static int first_so_symnum
;
1220 static const char *dirname_nso
;
1221 int prev_textlow_not_set
;
1223 valu
= nlist
.n_value
;
1225 prev_textlow_not_set
= textlow_not_set
;
1227 /* A zero value is probably an indication for the SunPRO 3.0
1228 compiler. dbx_end_psymtab explicitly tests for zero, so
1229 don't relocate it. */
1231 if (nlist
.n_value
== 0
1232 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1234 textlow_not_set
= 1;
1238 textlow_not_set
= 0;
1240 past_first_source_file
= 1;
1242 if (prev_so_symnum
!= symnum
- 1)
1243 { /* Here if prev stab wasn't N_SO. */
1244 first_so_symnum
= symnum
;
1248 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
,
1249 includes_used
, symnum
* symbol_size
,
1250 (valu
> pst
->raw_text_high ()
1251 ? valu
: pst
->raw_text_high ()),
1252 dependency_list
, dependencies_used
,
1253 prev_textlow_not_set
);
1254 pst
= (legacy_psymtab
*) 0;
1256 dependencies_used
= 0;
1257 has_line_numbers
= 0;
1261 prev_so_symnum
= symnum
;
1263 /* End the current partial symtab and start a new one. */
1265 namestring
= set_namestring (objfile
, &nlist
);
1267 /* Null name means end of .o file. Don't start a new one. */
1268 if (*namestring
== '\000')
1271 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1272 The first one is a directory name; the second the file name.
1273 If pst exists, is empty, and has a filename ending in '/',
1274 we assume the previous N_SO was a directory name. */
1276 p
= lbasename (namestring
);
1277 if (p
!= namestring
&& *p
== '\000')
1279 /* Save the directory name SOs locally, then save it into
1280 the psymtab when it's created below. */
1281 dirname_nso
= namestring
;
1285 /* Some other compilers (C++ ones in particular) emit useless
1286 SOs for non-existant .c files. We ignore all subsequent SOs
1287 that immediately follow the first. */
1291 pst
= start_psymtab (objfile
,
1293 first_so_symnum
* symbol_size
);
1294 pst
->dirname
= dirname_nso
;
1302 enum language tmp_language
;
1304 /* Add this bincl to the bincl_list for future EXCLs. No
1305 need to save the string; it'll be around until
1306 read_dbx_symtab function returns. */
1308 namestring
= set_namestring (objfile
, &nlist
);
1309 tmp_language
= deduce_language_from_filename (namestring
);
1311 /* Only change the psymtab's language if we've learned
1312 something useful (eg. tmp_language is not language_unknown).
1313 In addition, to match what start_subfile does, never change
1315 if (tmp_language
!= language_unknown
1316 && (tmp_language
!= language_c
1317 || psymtab_language
!= language_cplus
))
1318 psymtab_language
= tmp_language
;
1322 /* FIXME: we should not get here without a PST to work on.
1323 Attempt to recover. */
1324 complaint (_("N_BINCL %s not in entries for "
1325 "any file, at symtab pos %d"),
1326 namestring
, symnum
);
1329 bincl_list
->emplace_back (namestring
, nlist
.n_value
, pst
);
1331 /* Mark down an include file in the current psymtab. */
1333 goto record_include_file
;
1338 enum language tmp_language
;
1340 /* Mark down an include file in the current psymtab. */
1341 namestring
= set_namestring (objfile
, &nlist
);
1342 tmp_language
= deduce_language_from_filename (namestring
);
1344 /* Only change the psymtab's language if we've learned
1345 something useful (eg. tmp_language is not language_unknown).
1346 In addition, to match what start_subfile does, never change
1348 if (tmp_language
!= language_unknown
1349 && (tmp_language
!= language_c
1350 || psymtab_language
!= language_cplus
))
1351 psymtab_language
= tmp_language
;
1353 /* In C++, one may expect the same filename to come round many
1354 times, when code is coming alternately from the main file
1355 and from inline functions in other files. So I check to see
1356 if this is a file we've seen before -- either the main
1357 source file, or a previously included file.
1359 This seems to be a lot of time to be spending on N_SOL, but
1360 things like "break c-exp.y:435" need to work (I
1361 suppose the psymtab_include_list could be hashed or put
1362 in a binary tree, if profiling shows this is a major hog). */
1363 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
1368 for (i
= 0; i
< includes_used
; i
++)
1369 if (filename_cmp (namestring
, psymtab_include_list
[i
]) == 0)
1378 record_include_file
:
1380 psymtab_include_list
[includes_used
++] = namestring
;
1381 if (includes_used
>= includes_allocated
)
1383 const char **orig
= psymtab_include_list
;
1385 psymtab_include_list
= (const char **)
1386 alloca ((includes_allocated
*= 2) * sizeof (const char *));
1387 memcpy (psymtab_include_list
, orig
,
1388 includes_used
* sizeof (const char *));
1392 case N_LSYM
: /* Typedef or automatic variable. */
1393 case N_STSYM
: /* Data seg var -- static. */
1394 case N_LCSYM
: /* BSS " */
1395 case N_ROSYM
: /* Read-only data seg var -- static. */
1396 case N_NBSTS
: /* Gould nobase. */
1397 case N_NBLCS
: /* symbols. */
1399 case N_GSYM
: /* Global (extern) variable; can be
1400 data or bss (sigh FIXME). */
1402 /* Following may probably be ignored; I'll leave them here
1403 for now (until I do Pascal and Modula 2 extensions). */
1405 case N_PC
: /* I may or may not need this; I
1407 case N_M2C
: /* I suspect that I can ignore this here. */
1408 case N_SCOPE
: /* Same. */
1412 namestring
= set_namestring (objfile
, &nlist
);
1414 /* See if this is an end of function stab. */
1415 if (pst
&& nlist
.n_type
== N_FUN
&& *namestring
== '\000')
1419 /* It's value is the size (in bytes) of the function for
1420 function relative stabs, or the address of the function's
1421 end for old style stabs. */
1422 valu
= nlist
.n_value
+ last_function_start
;
1423 if (pst
->raw_text_high () == 0 || valu
> pst
->raw_text_high ())
1424 pst
->set_text_high (valu
);
1428 p
= (char *) strchr (namestring
, ':');
1430 continue; /* Not a debugging symbol. */
1433 sym_name
= NULL
; /* pacify "gcc -Werror" */
1434 if (psymtab_language
== language_cplus
)
1436 std::string
name (namestring
, p
- namestring
);
1437 std::string new_name
= cp_canonicalize_string (name
.c_str ());
1438 if (!new_name
.empty ())
1440 sym_len
= new_name
.length ();
1441 sym_name
= obstack_strdup (&objfile
->objfile_obstack
,
1448 sym_name
= namestring
;
1449 sym_len
= p
- namestring
;
1452 /* Main processing section for debugging symbols which
1453 the initial read through the symbol tables needs to worry
1454 about. If we reach this point, the symbol which we are
1455 considering is definitely one we are interested in.
1456 p must also contain the (valid) index into the namestring
1457 which indicates the debugging type symbol. */
1462 if (gdbarch_static_transform_name_p (gdbarch
))
1463 gdbarch_static_transform_name (gdbarch
, namestring
);
1465 add_psymbol_to_list (gdb::string_view (sym_name
, sym_len
), true,
1466 VAR_DOMAIN
, LOC_STATIC
,
1468 psymbol_placement::STATIC
,
1469 nlist
.n_value
, psymtab_language
, objfile
);
1473 /* The addresses in these entries are reported to be
1474 wrong. See the code that reads 'G's for symtabs. */
1475 add_psymbol_to_list (gdb::string_view (sym_name
, sym_len
), true,
1476 VAR_DOMAIN
, LOC_STATIC
,
1478 psymbol_placement::GLOBAL
,
1479 nlist
.n_value
, psymtab_language
, objfile
);
1483 /* When a 'T' entry is defining an anonymous enum, it
1484 may have a name which is the empty string, or a
1485 single space. Since they're not really defining a
1486 symbol, those shouldn't go in the partial symbol
1487 table. We do pick up the elements of such enums at
1488 'check_enum:', below. */
1489 if (p
>= namestring
+ 2
1490 || (p
== namestring
+ 1
1491 && namestring
[0] != ' '))
1493 add_psymbol_to_list (gdb::string_view (sym_name
, sym_len
),
1494 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
1495 psymbol_placement::STATIC
,
1496 0, psymtab_language
, objfile
);
1499 /* Also a typedef with the same name. */
1500 add_psymbol_to_list (gdb::string_view (sym_name
, sym_len
),
1501 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
1502 psymbol_placement::STATIC
,
1503 0, psymtab_language
, objfile
);
1510 if (p
!= namestring
) /* a name is there, not just :T... */
1512 add_psymbol_to_list (gdb::string_view (sym_name
, sym_len
),
1513 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
1514 psymbol_placement::STATIC
,
1515 0, psymtab_language
, objfile
);
1518 /* If this is an enumerated type, we need to
1519 add all the enum constants to the partial symbol
1520 table. This does not cover enums without names, e.g.
1521 "enum {a, b} c;" in C, but fortunately those are
1522 rare. There is no way for GDB to find those from the
1523 enum type without spending too much time on it. Thus
1524 to solve this problem, the compiler needs to put out the
1525 enum in a nameless type. GCC2 does this. */
1527 /* We are looking for something of the form
1528 <name> ":" ("t" | "T") [<number> "="] "e"
1529 {<constant> ":" <value> ","} ";". */
1531 /* Skip over the colon and the 't' or 'T'. */
1533 /* This type may be given a number. Also, numbers can come
1534 in pairs like (0,26). Skip over it. */
1535 while ((*p
>= '0' && *p
<= '9')
1536 || *p
== '(' || *p
== ',' || *p
== ')'
1542 /* The aix4 compiler emits extra crud before the members. */
1545 /* Skip over the type (?). */
1549 /* Skip over the colon. */
1553 /* We have found an enumerated type. */
1554 /* According to comments in read_enum_type
1555 a comma could end it instead of a semicolon.
1556 I don't know where that happens.
1558 while (*p
&& *p
!= ';' && *p
!= ',')
1562 /* Check for and handle cretinous dbx symbol name
1564 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
1565 p
= next_symbol_text (objfile
);
1567 /* Point to the character after the name
1568 of the enum constant. */
1569 for (q
= p
; *q
&& *q
!= ':'; q
++)
1571 /* Note that the value doesn't matter for
1572 enum constants in psymtabs, just in symtabs. */
1573 add_psymbol_to_list (gdb::string_view (p
, q
- p
), true,
1574 VAR_DOMAIN
, LOC_CONST
, -1,
1575 psymbol_placement::STATIC
, 0,
1576 psymtab_language
, objfile
);
1577 /* Point past the name. */
1579 /* Skip over the value. */
1580 while (*p
&& *p
!= ',')
1582 /* Advance past the comma. */
1590 /* Constant, e.g. from "const" in Pascal. */
1591 add_psymbol_to_list (gdb::string_view (sym_name
, sym_len
), true,
1592 VAR_DOMAIN
, LOC_CONST
, -1,
1593 psymbol_placement::STATIC
, 0,
1594 psymtab_language
, objfile
);
1600 int name_len
= p
- namestring
;
1601 char *name
= (char *) xmalloc (name_len
+ 1);
1603 memcpy (name
, namestring
, name_len
);
1604 name
[name_len
] = '\0';
1605 function_outside_compilation_unit_complaint (name
);
1608 /* Kludges for ELF/STABS with Sun ACC. */
1609 last_function_name
= namestring
;
1610 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1611 value for the bottom of the text seg in those cases. */
1612 if (nlist
.n_value
== 0
1613 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1615 struct bound_minimal_symbol minsym
1616 = find_stab_function (namestring
,
1617 pst
? pst
->filename
: NULL
,
1619 if (minsym
.minsym
!= NULL
)
1620 nlist
.n_value
= MSYMBOL_VALUE_RAW_ADDRESS (minsym
.minsym
);
1622 if (pst
&& textlow_not_set
1623 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1625 pst
->set_text_low (nlist
.n_value
);
1626 textlow_not_set
= 0;
1630 /* Keep track of the start of the last function so we
1631 can handle end of function symbols. */
1632 last_function_start
= nlist
.n_value
;
1634 /* In reordered executables this function may lie outside
1635 the bounds created by N_SO symbols. If that's the case
1636 use the address of this function as the low bound for
1637 the partial symbol table. */
1640 || (nlist
.n_value
< pst
->raw_text_low ()
1641 && (nlist
.n_value
!= 0))))
1643 pst
->set_text_low (nlist
.n_value
);
1644 textlow_not_set
= 0;
1646 add_psymbol_to_list (gdb::string_view (sym_name
, sym_len
), true,
1647 VAR_DOMAIN
, LOC_BLOCK
,
1648 SECT_OFF_TEXT (objfile
),
1649 psymbol_placement::STATIC
,
1650 nlist
.n_value
, psymtab_language
, objfile
);
1653 /* Global functions were ignored here, but now they
1654 are put into the global psymtab like one would expect.
1655 They're also in the minimal symbol table. */
1659 int name_len
= p
- namestring
;
1660 char *name
= (char *) xmalloc (name_len
+ 1);
1662 memcpy (name
, namestring
, name_len
);
1663 name
[name_len
] = '\0';
1664 function_outside_compilation_unit_complaint (name
);
1667 /* Kludges for ELF/STABS with Sun ACC. */
1668 last_function_name
= namestring
;
1669 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1670 value for the bottom of the text seg in those cases. */
1671 if (nlist
.n_value
== 0
1672 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1674 struct bound_minimal_symbol minsym
1675 = find_stab_function (namestring
,
1676 pst
? pst
->filename
: NULL
,
1678 if (minsym
.minsym
!= NULL
)
1679 nlist
.n_value
= MSYMBOL_VALUE_RAW_ADDRESS (minsym
.minsym
);
1681 if (pst
&& textlow_not_set
1682 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1684 pst
->set_text_low (nlist
.n_value
);
1685 textlow_not_set
= 0;
1689 /* Keep track of the start of the last function so we
1690 can handle end of function symbols. */
1691 last_function_start
= nlist
.n_value
;
1693 /* In reordered executables this function may lie outside
1694 the bounds created by N_SO symbols. If that's the case
1695 use the address of this function as the low bound for
1696 the partial symbol table. */
1699 || (nlist
.n_value
< pst
->raw_text_low ()
1700 && (nlist
.n_value
!= 0))))
1702 pst
->set_text_low (nlist
.n_value
);
1703 textlow_not_set
= 0;
1705 add_psymbol_to_list (gdb::string_view (sym_name
, sym_len
), true,
1706 VAR_DOMAIN
, LOC_BLOCK
,
1707 SECT_OFF_TEXT (objfile
),
1708 psymbol_placement::GLOBAL
,
1709 nlist
.n_value
, psymtab_language
, objfile
);
1712 /* Two things show up here (hopefully); static symbols of
1713 local scope (static used inside braces) or extensions
1714 of structure symbols. We can ignore both. */
1728 case '#': /* For symbol identification (used in live ranges). */
1732 /* It is a C++ nested symbol. We don't need to record it
1733 (I don't think); if we try to look up foo::bar::baz,
1734 then symbols for the symtab containing foo should get
1735 read in, I think. */
1736 /* Someone says sun cc puts out symbols like
1737 /foo/baz/maclib::/usr/local/bin/maclib,
1738 which would get here with a symbol type of ':'. */
1742 /* Unexpected symbol descriptor. The second and subsequent stabs
1743 of a continued stab can show up here. The question is
1744 whether they ever can mimic a normal stab--it would be
1745 nice if not, since we certainly don't want to spend the
1746 time searching to the end of every string looking for
1749 complaint (_("unknown symbol descriptor `%c'"),
1752 /* Ignore it; perhaps it is an extension that we don't
1760 namestring
= set_namestring (objfile
, &nlist
);
1762 /* Find the corresponding bincl and mark that psymtab on the
1763 psymtab dependency list. */
1765 legacy_psymtab
*needed_pst
=
1766 find_corresponding_bincl_psymtab (namestring
, nlist
.n_value
);
1768 /* If this include file was defined earlier in this file,
1770 if (needed_pst
== pst
)
1778 for (i
= 0; i
< dependencies_used
; i
++)
1779 if (dependency_list
[i
] == needed_pst
)
1785 /* If it's already in the list, skip the rest. */
1789 dependency_list
[dependencies_used
++] = needed_pst
;
1790 if (dependencies_used
>= dependencies_allocated
)
1792 legacy_psymtab
**orig
= dependency_list
;
1796 alloca ((dependencies_allocated
*= 2)
1797 * sizeof (legacy_psymtab
*));
1798 memcpy (dependency_list
, orig
,
1800 * sizeof (legacy_psymtab
*)));
1802 fprintf_unfiltered (gdb_stderr
,
1803 "Had to reallocate "
1804 "dependency list.\n");
1805 fprintf_unfiltered (gdb_stderr
,
1806 "New dependencies allocated: %d\n",
1807 dependencies_allocated
);
1815 /* Solaris 2 end of module, finish current partial symbol
1816 table. dbx_end_psymtab will set the high text address of
1817 PST to the proper value, which is necessary if a module
1818 compiled without debugging info follows this module. */
1819 if (pst
&& gdbarch_sofun_address_maybe_missing (gdbarch
))
1821 dbx_end_psymtab (objfile
, pst
,
1822 psymtab_include_list
, includes_used
,
1823 symnum
* symbol_size
,
1824 (CORE_ADDR
) 0, dependency_list
,
1825 dependencies_used
, textlow_not_set
);
1826 pst
= (legacy_psymtab
*) 0;
1828 dependencies_used
= 0;
1829 has_line_numbers
= 0;
1835 HANDLE_RBRAC (nlist
.n_value
);
1841 case N_SSYM
: /* Claim: Structure or union element.
1842 Hopefully, I can ignore this. */
1843 case N_ENTRY
: /* Alternate entry point; can ignore. */
1844 case N_MAIN
: /* Can definitely ignore this. */
1845 case N_CATCH
: /* These are GNU C++ extensions */
1846 case N_EHDECL
: /* that can safely be ignored here. */
1858 case N_NSYMS
: /* Ultrix 4.0: symbol count */
1859 case N_DEFD
: /* GNU Modula-2 */
1860 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
1862 case N_OBJ
: /* Useless types from Solaris. */
1865 /* These symbols aren't interesting; don't worry about them. */
1869 /* If we haven't found it yet, ignore it. It's probably some
1870 new type we don't know about yet. */
1871 unknown_symtype_complaint (hex_string (nlist
.n_type
));
1876 /* If there's stuff to be cleaned up, clean it up. */
1879 /* Don't set high text address of PST lower than it already
1881 CORE_ADDR text_end
=
1882 (lowest_text_address
== (CORE_ADDR
) -1
1884 : lowest_text_address
)
1887 dbx_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
1888 symnum
* symbol_size
,
1889 (text_end
> pst
->raw_text_high ()
1890 ? text_end
: pst
->raw_text_high ()),
1891 dependency_list
, dependencies_used
, textlow_not_set
);
1895 /* Allocate and partially fill a partial symtab. It will be
1896 completely filled at the end of the symbol list.
1898 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1899 is the address relative to which its symbols are (incremental) or 0
1902 static legacy_psymtab
*
1903 start_psymtab (struct objfile
*objfile
, const char *filename
, CORE_ADDR textlow
,
1906 legacy_psymtab
*result
= new legacy_psymtab (filename
, objfile
, textlow
);
1908 result
->read_symtab_private
=
1909 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
1910 LDSYMOFF (result
) = ldsymoff
;
1911 result
->legacy_read_symtab
= dbx_read_symtab
;
1912 result
->legacy_expand_psymtab
= dbx_psymtab_to_symtab_1
;
1913 SYMBOL_SIZE (result
) = symbol_size
;
1914 SYMBOL_OFFSET (result
) = symbol_table_offset
;
1915 STRING_OFFSET (result
) = string_table_offset
;
1916 FILE_STRING_OFFSET (result
) = file_string_table_offset
;
1918 /* Deduce the source language from the filename for this psymtab. */
1919 psymtab_language
= deduce_language_from_filename (filename
);
1920 PST_LANGUAGE (result
) = psymtab_language
;
1925 /* Close off the current usage of PST.
1926 Returns PST or NULL if the partial symtab was empty and thrown away.
1928 FIXME: List variables and peculiarities of same. */
1931 dbx_end_psymtab (struct objfile
*objfile
, legacy_psymtab
*pst
,
1932 const char **include_list
, int num_includes
,
1933 int capping_symbol_offset
, CORE_ADDR capping_text
,
1934 legacy_psymtab
**dependency_list
,
1935 int number_dependencies
,
1936 int textlow_not_set
)
1939 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1941 if (capping_symbol_offset
!= -1)
1942 LDSYMLEN (pst
) = capping_symbol_offset
- LDSYMOFF (pst
);
1943 pst
->set_text_high (capping_text
);
1945 /* Under Solaris, the N_SO symbols always have a value of 0,
1946 instead of the usual address of the .o file. Therefore,
1947 we have to do some tricks to fill in texthigh and textlow.
1948 The first trick is: if we see a static
1949 or global function, and the textlow for the current pst
1950 is not set (ie: textlow_not_set), then we use that function's
1951 address for the textlow of the pst. */
1953 /* Now, to fill in texthigh, we remember the last function seen
1954 in the .o file. Also, there's a hack in
1955 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1956 to here via the misc_info field. Therefore, we can fill in
1957 a reliable texthigh by taking the address plus size of the
1958 last function in the file. */
1960 if (!pst
->text_high_valid
&& last_function_name
1961 && gdbarch_sofun_address_maybe_missing (gdbarch
))
1964 struct bound_minimal_symbol minsym
;
1966 const char *colon
= strchr (last_function_name
, ':');
1970 n
= colon
- last_function_name
;
1971 char *p
= (char *) alloca (n
+ 2);
1972 strncpy (p
, last_function_name
, n
);
1975 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
1976 if (minsym
.minsym
== NULL
)
1978 /* Sun Fortran appends an underscore to the minimal symbol name,
1979 try again with an appended underscore if the minimal symbol
1983 minsym
= lookup_minimal_symbol (p
, pst
->filename
, objfile
);
1987 pst
->set_text_high (MSYMBOL_VALUE_RAW_ADDRESS (minsym
.minsym
)
1988 + MSYMBOL_SIZE (minsym
.minsym
));
1990 last_function_name
= NULL
;
1993 if (!gdbarch_sofun_address_maybe_missing (gdbarch
))
1995 /* This test will be true if the last .o file is only data. */
1996 else if (textlow_not_set
)
1997 pst
->set_text_low (pst
->raw_text_high ());
2000 /* If we know our own starting text address, then walk through all other
2001 psymtabs for this objfile, and if any didn't know their ending text
2002 address, set it to our starting address. Take care to not set our
2003 own ending address to our starting address. */
2005 for (partial_symtab
*p1
: objfile
->psymtabs ())
2006 if (!p1
->text_high_valid
&& p1
->text_low_valid
&& p1
!= pst
)
2007 p1
->set_text_high (pst
->raw_text_low ());
2010 /* End of kludge for patching Solaris textlow and texthigh. */
2012 end_psymtab_common (objfile
, pst
);
2014 pst
->number_of_dependencies
= number_dependencies
;
2015 if (number_dependencies
)
2018 = objfile
->partial_symtabs
->allocate_dependencies (number_dependencies
);
2019 memcpy (pst
->dependencies
, dependency_list
,
2020 number_dependencies
* sizeof (legacy_psymtab
*));
2023 pst
->dependencies
= 0;
2025 for (i
= 0; i
< num_includes
; i
++)
2027 legacy_psymtab
*subpst
=
2028 new legacy_psymtab (include_list
[i
], objfile
);
2030 subpst
->read_symtab_private
=
2031 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2033 LDSYMLEN (subpst
) = 0;
2035 /* We could save slight bits of space by only making one of these,
2036 shared by the entire set of include files. FIXME-someday. */
2037 subpst
->dependencies
=
2038 objfile
->partial_symtabs
->allocate_dependencies (1);
2039 subpst
->dependencies
[0] = pst
;
2040 subpst
->number_of_dependencies
= 1;
2042 subpst
->legacy_read_symtab
= pst
->legacy_read_symtab
;
2043 subpst
->legacy_expand_psymtab
= pst
->legacy_expand_psymtab
;
2046 if (num_includes
== 0
2047 && number_dependencies
== 0
2048 && pst
->n_global_syms
== 0
2049 && pst
->n_static_syms
== 0
2050 && has_line_numbers
== 0)
2052 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2053 it is on the obstack, but we can forget to chain it on the list. */
2054 /* Empty psymtabs happen as a result of header files which don't have
2055 any symbols in them. There can be a lot of them. But this check
2056 is wrong, in that a psymtab with N_SLINE entries but nothing else
2057 is not empty, but we don't realize that. Fixing that without slowing
2058 things down might be tricky. */
2060 discard_psymtab (objfile
, pst
);
2062 /* Indicate that psymtab was thrown away. */
2069 dbx_psymtab_to_symtab_1 (legacy_psymtab
*pst
, struct objfile
*objfile
)
2075 fprintf_unfiltered (gdb_stderr
, "Psymtab for %s already read in. "
2076 "Shouldn't happen.\n",
2081 /* Read in all partial symtabs on which this one is dependent. */
2082 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2083 if (!pst
->dependencies
[i
]->readin
)
2085 /* Inform about additional files that need to be read in. */
2088 fputs_filtered (" ", gdb_stdout
);
2090 fputs_filtered ("and ", gdb_stdout
);
2092 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2093 wrap_here (""); /* Flush output. */
2094 gdb_flush (gdb_stdout
);
2096 pst
->dependencies
[i
]->expand_psymtab (objfile
);
2099 if (LDSYMLEN (pst
)) /* Otherwise it's a dummy. */
2101 /* Init stuff necessary for reading in symbols */
2103 scoped_free_pendings free_pending
;
2104 file_string_table_offset
= FILE_STRING_OFFSET (pst
);
2105 symbol_size
= SYMBOL_SIZE (pst
);
2107 /* Read in this file's symbols. */
2108 bfd_seek (objfile
->obfd
, SYMBOL_OFFSET (pst
), SEEK_SET
);
2109 read_ofile_symtab (objfile
, pst
);
2115 /* Read in all of the symbols for a given psymtab for real.
2116 Be verbose about it if the user wants that. SELF is not NULL. */
2119 dbx_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
2121 gdb_assert (!self
->readin
);
2123 if (LDSYMLEN (self
) || self
->number_of_dependencies
)
2125 next_symbol_text_func
= dbx_next_symbol_text
;
2128 scoped_restore restore_stabs_data
= make_scoped_restore (&stabs_data
);
2129 gdb::unique_xmalloc_ptr
<gdb_byte
> data_holder
;
2130 if (DBX_STAB_SECTION (objfile
))
2133 = symfile_relocate_debug_section (objfile
,
2134 DBX_STAB_SECTION (objfile
),
2136 data_holder
.reset (stabs_data
);
2139 self
->expand_psymtab (objfile
);
2142 /* Match with global symbols. This only needs to be done once,
2143 after all of the symtabs and dependencies have been read in. */
2144 scan_file_globals (objfile
);
2148 /* Read in a defined section of a specific object file's symbols. */
2151 read_ofile_symtab (struct objfile
*objfile
, legacy_psymtab
*pst
)
2153 const char *namestring
;
2154 struct external_nlist
*bufp
;
2155 struct internal_nlist nlist
;
2157 unsigned max_symnum
;
2159 int sym_offset
; /* Offset to start of symbols to read */
2160 int sym_size
; /* Size of symbols to read */
2161 CORE_ADDR text_offset
; /* Start of text segment for symbols */
2162 int text_size
; /* Size of text segment for symbols */
2164 sym_offset
= LDSYMOFF (pst
);
2165 sym_size
= LDSYMLEN (pst
);
2166 text_offset
= pst
->text_low (objfile
);
2167 text_size
= pst
->text_high (objfile
) - pst
->text_low (objfile
);
2168 const section_offsets
§ion_offsets
= objfile
->section_offsets
;
2170 dbxread_objfile
= objfile
;
2172 stringtab_global
= DBX_STRINGTAB (objfile
);
2173 set_last_source_file (NULL
);
2175 abfd
= objfile
->obfd
;
2176 symfile_bfd
= objfile
->obfd
; /* Implicit param to next_text_symbol. */
2177 symbuf_end
= symbuf_idx
= 0;
2179 symbuf_left
= sym_offset
+ sym_size
;
2181 /* It is necessary to actually read one symbol *before* the start
2182 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2183 occurs before the N_SO symbol.
2185 Detecting this in read_dbx_symtab
2186 would slow down initial readin, so we look for it here instead. */
2187 if (!processing_acc_compilation
&& sym_offset
>= (int) symbol_size
)
2189 stabs_seek (sym_offset
- symbol_size
);
2191 bufp
= &symbuf
[symbuf_idx
++];
2192 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2193 OBJSTAT (objfile
, n_stabs
++);
2195 namestring
= set_namestring (objfile
, &nlist
);
2197 processing_gcc_compilation
= 0;
2198 if (nlist
.n_type
== N_TEXT
)
2200 const char *tempstring
= namestring
;
2202 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2203 processing_gcc_compilation
= 1;
2204 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2205 processing_gcc_compilation
= 2;
2206 if (tempstring
[0] == bfd_get_symbol_leading_char (symfile_bfd
))
2208 if (startswith (tempstring
, "__gnu_compiled"))
2209 processing_gcc_compilation
= 2;
2214 /* The N_SO starting this symtab is the first symbol, so we
2215 better not check the symbol before it. I'm not this can
2216 happen, but it doesn't hurt to check for it. */
2217 stabs_seek (sym_offset
);
2218 processing_gcc_compilation
= 0;
2221 if (symbuf_idx
== symbuf_end
)
2223 bufp
= &symbuf
[symbuf_idx
];
2224 if (bfd_h_get_8 (abfd
, bufp
->e_type
) != N_SO
)
2225 error (_("First symbol in segment of executable not a source symbol"));
2227 max_symnum
= sym_size
/ symbol_size
;
2230 symnum
< max_symnum
;
2233 QUIT
; /* Allow this to be interruptable. */
2234 if (symbuf_idx
== symbuf_end
)
2236 bufp
= &symbuf
[symbuf_idx
++];
2237 INTERNALIZE_SYMBOL (nlist
, bufp
, abfd
);
2238 OBJSTAT (objfile
, n_stabs
++);
2240 type
= bfd_h_get_8 (abfd
, bufp
->e_type
);
2242 namestring
= set_namestring (objfile
, &nlist
);
2246 if (sizeof (nlist
.n_value
) > 4
2247 /* We are a 64-bit debugger debugging a 32-bit program. */
2248 && (type
== N_LSYM
|| type
== N_PSYM
))
2249 /* We have to be careful with the n_value in the case of N_LSYM
2250 and N_PSYM entries, because they are signed offsets from frame
2251 pointer, but we actually read them as unsigned 32-bit values.
2252 This is not a problem for 32-bit debuggers, for which negative
2253 values end up being interpreted correctly (as negative
2254 offsets) due to integer overflow.
2255 But we need to sign-extend the value for 64-bit debuggers,
2256 or we'll end up interpreting negative values as very large
2257 positive offsets. */
2258 nlist
.n_value
= (nlist
.n_value
^ 0x80000000) - 0x80000000;
2259 process_one_symbol (type
, nlist
.n_desc
, nlist
.n_value
,
2260 namestring
, section_offsets
, objfile
,
2261 PST_LANGUAGE (pst
));
2263 /* We skip checking for a new .o or -l file; that should never
2264 happen in this routine. */
2265 else if (type
== N_TEXT
)
2267 /* I don't think this code will ever be executed, because
2268 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2269 the N_SO symbol which starts this source file.
2270 However, there is no reason not to accept
2271 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2273 if (strcmp (namestring
, GCC_COMPILED_FLAG_SYMBOL
) == 0)
2274 processing_gcc_compilation
= 1;
2275 else if (strcmp (namestring
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2276 processing_gcc_compilation
= 2;
2278 else if (type
& N_EXT
|| type
== (unsigned char) N_TEXT
2279 || type
== (unsigned char) N_NBTEXT
)
2281 /* Global symbol: see if we came across a dbx definition for
2282 a corresponding symbol. If so, store the value. Remove
2283 syms from the chain when their values are stored, but
2284 search the whole chain, as there may be several syms from
2285 different files with the same name. */
2286 /* This is probably not true. Since the files will be read
2287 in one at a time, each reference to a global symbol will
2288 be satisfied in each file as it appears. So we skip this
2294 /* In a Solaris elf file, this variable, which comes from the value
2295 of the N_SO symbol, will still be 0. Luckily, text_offset, which
2296 comes from low text address of PST, is correct. */
2297 if (get_last_source_start_addr () == 0)
2298 set_last_source_start_addr (text_offset
);
2300 /* In reordered executables last_source_start_addr may not be the
2301 lower bound for this symtab, instead use text_offset which comes
2302 from the low text address of PST, which is correct. */
2303 if (get_last_source_start_addr () > text_offset
)
2304 set_last_source_start_addr (text_offset
);
2306 pst
->compunit_symtab
= end_symtab (text_offset
+ text_size
,
2307 SECT_OFF_TEXT (objfile
));
2311 dbxread_objfile
= NULL
;
2315 /* Record the namespace that the function defined by SYMBOL was
2316 defined in, if necessary. BLOCK is the associated block; use
2317 OBSTACK for allocation. */
2320 cp_set_block_scope (const struct symbol
*symbol
,
2321 struct block
*block
,
2322 struct obstack
*obstack
)
2324 if (symbol
->demangled_name () != NULL
)
2326 /* Try to figure out the appropriate namespace from the
2329 /* FIXME: carlton/2003-04-15: If the function in question is
2330 a method of a class, the name will actually include the
2331 name of the class as well. This should be harmless, but
2332 is a little unfortunate. */
2334 const char *name
= symbol
->demangled_name ();
2335 unsigned int prefix_len
= cp_entire_prefix_len (name
);
2337 block_set_scope (block
, obstack_strndup (obstack
, name
, prefix_len
),
2342 /* This handles a single symbol from the symbol-file, building symbols
2343 into a GDB symtab. It takes these arguments and an implicit argument.
2345 TYPE is the type field of the ".stab" symbol entry.
2346 DESC is the desc field of the ".stab" entry.
2347 VALU is the value field of the ".stab" entry.
2348 NAME is the symbol name, in our address space.
2349 SECTION_OFFSETS is a set of amounts by which the sections of this
2350 object file were relocated when it was loaded into memory. Note
2351 that these section_offsets are not the objfile->section_offsets but
2352 the pst->section_offsets. All symbols that refer to memory
2353 locations need to be offset by these amounts.
2354 OBJFILE is the object file from which we are reading symbols. It
2355 is used in end_symtab.
2356 LANGUAGE is the language of the symtab.
2360 process_one_symbol (int type
, int desc
, CORE_ADDR valu
, const char *name
,
2361 const section_offsets
§ion_offsets
,
2362 struct objfile
*objfile
, enum language language
)
2364 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2365 struct context_stack
*newobj
;
2366 struct context_stack cstk
;
2367 /* This remembers the address of the start of a function. It is
2368 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2369 are relative to the current function's start address. On systems
2370 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2371 and is used to relocate these symbol types rather than
2373 static CORE_ADDR function_start_offset
;
2375 /* This holds the address of the start of a function, without the
2376 system peculiarities of function_start_offset. */
2377 static CORE_ADDR last_function_start
;
2379 /* If this is nonzero, we've seen an N_SLINE since the start of the
2380 current function. We use this to tell us to move the first sline
2381 to the beginning of the function regardless of what its given
2383 static int sline_found_in_function
= 1;
2385 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2386 source file. Used to detect the SunPRO solaris compiler. */
2387 static int n_opt_found
;
2389 /* Something is wrong if we see real data before seeing a source
2392 if (get_last_source_file () == NULL
&& type
!= (unsigned char) N_SO
)
2394 /* Ignore any symbols which appear before an N_SO symbol.
2395 Currently no one puts symbols there, but we should deal
2396 gracefully with the case. A complain()t might be in order,
2397 but this should not be an error (). */
2406 if (*name
== '\000')
2408 /* This N_FUN marks the end of a function. This closes off
2409 the current block. */
2410 struct block
*block
;
2412 if (outermost_context_p ())
2414 lbrac_mismatch_complaint (symnum
);
2418 /* The following check is added before recording line 0 at
2419 end of function so as to handle hand-generated stabs
2420 which may have an N_FUN stabs at the end of the function,
2421 but no N_SLINE stabs. */
2422 if (sline_found_in_function
)
2424 CORE_ADDR addr
= last_function_start
+ valu
;
2426 record_line (get_current_subfile (), 0,
2427 gdbarch_addr_bits_remove (gdbarch
, addr
));
2430 within_function
= 0;
2431 cstk
= pop_context ();
2433 /* Make a block for the local symbols within. */
2434 block
= finish_block (cstk
.name
,
2435 cstk
.old_blocks
, NULL
,
2436 cstk
.start_addr
, cstk
.start_addr
+ valu
);
2438 /* For C++, set the block's scope. */
2439 if (cstk
.name
->language () == language_cplus
)
2440 cp_set_block_scope (cstk
.name
, block
, &objfile
->objfile_obstack
);
2442 /* May be switching to an assembler file which may not be using
2443 block relative stabs, so reset the offset. */
2444 function_start_offset
= 0;
2449 sline_found_in_function
= 0;
2451 /* Relocate for dynamic loading. */
2452 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2453 valu
= gdbarch_addr_bits_remove (gdbarch
, valu
);
2454 last_function_start
= valu
;
2456 goto define_a_symbol
;
2459 /* This "symbol" just indicates the start of an inner lexical
2460 context within a function. */
2462 /* Ignore extra outermost context from SunPRO cc and acc. */
2463 if (n_opt_found
&& desc
== 1)
2466 valu
+= function_start_offset
;
2468 push_context (desc
, valu
);
2472 /* This "symbol" just indicates the end of an inner lexical
2473 context that was started with N_LBRAC. */
2475 /* Ignore extra outermost context from SunPRO cc and acc. */
2476 if (n_opt_found
&& desc
== 1)
2479 valu
+= function_start_offset
;
2481 if (outermost_context_p ())
2483 lbrac_mismatch_complaint (symnum
);
2487 cstk
= pop_context ();
2488 if (desc
!= cstk
.depth
)
2489 lbrac_mismatch_complaint (symnum
);
2491 if (*get_local_symbols () != NULL
)
2493 /* GCC development snapshots from March to December of
2494 2000 would output N_LSYM entries after N_LBRAC
2495 entries. As a consequence, these symbols are simply
2496 discarded. Complain if this is the case. */
2497 complaint (_("misplaced N_LBRAC entry; discarding local "
2498 "symbols which have no enclosing block"));
2500 *get_local_symbols () = cstk
.locals
;
2502 if (get_context_stack_depth () > 1)
2504 /* This is not the outermost LBRAC...RBRAC pair in the
2505 function, its local symbols preceded it, and are the ones
2506 just recovered from the context stack. Define the block
2507 for them (but don't bother if the block contains no
2508 symbols. Should we complain on blocks without symbols?
2509 I can't think of any useful purpose for them). */
2510 if (*get_local_symbols () != NULL
)
2512 /* Muzzle a compiler bug that makes end < start.
2514 ??? Which compilers? Is this ever harmful?. */
2515 if (cstk
.start_addr
> valu
)
2517 complaint (_("block start larger than block end"));
2518 cstk
.start_addr
= valu
;
2520 /* Make a block for the local symbols within. */
2521 finish_block (0, cstk
.old_blocks
, NULL
,
2522 cstk
.start_addr
, valu
);
2527 /* This is the outermost LBRAC...RBRAC pair. There is no
2528 need to do anything; leave the symbols that preceded it
2529 to be attached to the function's own block. We need to
2530 indicate that we just moved outside of the function. */
2531 within_function
= 0;
2538 /* This kind of symbol indicates the start of an object file.
2539 Relocate for dynamic loading. */
2540 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2544 /* This type of symbol indicates the start of data for one
2545 source file. Finish the symbol table of the previous source
2546 file (if any) and start accumulating a new symbol table.
2547 Relocate for dynamic loading. */
2548 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2552 if (get_last_source_file ())
2554 /* Check if previous symbol was also an N_SO (with some
2555 sanity checks). If so, that one was actually the
2556 directory name, and the current one is the real file
2557 name. Patch things up. */
2558 if (previous_stab_code
== (unsigned char) N_SO
)
2560 patch_subfile_names (get_current_subfile (), name
);
2561 break; /* Ignore repeated SOs. */
2563 end_symtab (valu
, SECT_OFF_TEXT (objfile
));
2567 /* Null name means this just marks the end of text for this .o
2568 file. Don't start a new symtab in this case. */
2569 if (*name
== '\000')
2572 function_start_offset
= 0;
2575 start_symtab (objfile
, name
, NULL
, valu
, language
);
2576 record_debugformat ("stabs");
2580 /* This type of symbol indicates the start of data for a
2581 sub-source-file, one whose contents were copied or included
2582 in the compilation of the main source file (whose name was
2583 given in the N_SO symbol). Relocate for dynamic loading. */
2584 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2585 start_subfile (name
);
2590 add_new_header_file (name
, valu
);
2591 start_subfile (name
);
2595 start_subfile (pop_subfile ());
2599 add_old_header_file (name
, valu
);
2603 /* This type of "symbol" really just records one line-number --
2604 core-address correspondence. Enter it in the line list for
2605 this symbol table. */
2607 /* Relocate for dynamic loading and for ELF acc
2608 function-relative symbols. */
2609 valu
+= function_start_offset
;
2611 /* GCC 2.95.3 emits the first N_SLINE stab somewhere in the
2612 middle of the prologue instead of right at the start of the
2613 function. To deal with this we record the address for the
2614 first N_SLINE stab to be the start of the function instead of
2615 the listed location. We really shouldn't to this. When
2616 compiling with optimization, this first N_SLINE stab might be
2617 optimized away. Other (non-GCC) compilers don't emit this
2618 stab at all. There is no real harm in having an extra
2619 numbered line, although it can be a bit annoying for the
2620 user. However, it totally screws up our testsuite.
2622 So for now, keep adjusting the address of the first N_SLINE
2623 stab, but only for code compiled with GCC. */
2625 if (within_function
&& sline_found_in_function
== 0)
2627 CORE_ADDR addr
= processing_gcc_compilation
== 2 ?
2628 last_function_start
: valu
;
2630 record_line (get_current_subfile (), desc
,
2631 gdbarch_addr_bits_remove (gdbarch
, addr
));
2632 sline_found_in_function
= 1;
2635 record_line (get_current_subfile (), desc
,
2636 gdbarch_addr_bits_remove (gdbarch
, valu
));
2640 common_block_start (name
, objfile
);
2644 common_block_end (objfile
);
2647 /* The following symbol types need to have the appropriate
2648 offset added to their value; then we process symbol
2649 definitions in the name. */
2651 case N_STSYM
: /* Static symbol in data segment. */
2652 case N_LCSYM
: /* Static symbol in BSS segment. */
2653 case N_ROSYM
: /* Static symbol in read-only data segment. */
2654 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2655 Solaris 2's stabs-in-elf makes *most* symbols relative but
2656 leaves a few absolute (at least for Solaris 2.1 and version
2657 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
2658 the fence. .stab "foo:S...",N_STSYM is absolute (ld
2659 relocates it) .stab "foo:V...",N_STSYM is relative (section
2660 base subtracted). This leaves us no choice but to search for
2661 the 'S' or 'V'... (or pass the whole section_offsets stuff
2662 down ONE MORE function call level, which we really don't want
2667 /* Normal object file and NLMs have non-zero text seg offsets,
2668 but don't need their static syms offset in this fashion.
2669 XXX - This is really a crock that should be fixed in the
2670 solib handling code so that I don't have to work around it
2673 if (!symfile_relocatable
)
2675 p
= strchr (name
, ':');
2676 if (p
!= 0 && p
[1] == 'S')
2678 /* The linker relocated it. We don't want to add a
2679 Sun-stabs Tfoo.foo-like offset, but we *do*
2680 want to add whatever solib.c passed to
2681 symbol_file_add as addr (this is known to affect
2682 SunOS 4, and I suspect ELF too). Since there is no
2683 Ttext.text symbol, we can get addr from the text offset. */
2684 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2685 goto define_a_symbol
;
2688 /* Since it's not the kludge case, re-dispatch to the right
2699 internal_error (__FILE__
, __LINE__
,
2700 _("failed internal consistency check"));
2704 case_N_STSYM
: /* Static symbol in data segment. */
2705 case N_DSLINE
: /* Source line number, data segment. */
2706 valu
+= section_offsets
[SECT_OFF_DATA (objfile
)];
2707 goto define_a_symbol
;
2709 case_N_LCSYM
: /* Static symbol in BSS segment. */
2710 case N_BSLINE
: /* Source line number, BSS segment. */
2711 /* N_BROWS: overlaps with N_BSLINE. */
2712 valu
+= section_offsets
[SECT_OFF_BSS (objfile
)];
2713 goto define_a_symbol
;
2715 case_N_ROSYM
: /* Static symbol in read-only data segment. */
2716 valu
+= section_offsets
[SECT_OFF_RODATA (objfile
)];
2717 goto define_a_symbol
;
2719 case N_ENTRY
: /* Alternate entry point. */
2720 /* Relocate for dynamic loading. */
2721 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
2722 goto define_a_symbol
;
2724 /* The following symbol types we don't know how to process.
2725 Handle them in a "default" way, but complain to people who
2728 case N_CATCH
: /* Exception handler catcher. */
2729 case N_EHDECL
: /* Exception handler name. */
2730 case N_PC
: /* Global symbol in Pascal. */
2731 case N_M2C
: /* Modula-2 compilation unit. */
2732 /* N_MOD2: overlaps with N_EHDECL. */
2733 case N_SCOPE
: /* Modula-2 scope information. */
2734 case N_ECOML
: /* End common (local name). */
2735 case N_NBTEXT
: /* Gould Non-Base-Register symbols??? */
2740 unknown_symtype_complaint (hex_string (type
));
2744 /* These symbol types don't need the address field relocated,
2745 since it is either unused, or is absolute. */
2746 case N_GSYM
: /* Global variable. */
2747 case N_NSYMS
: /* Number of symbols (Ultrix). */
2748 case N_NOMAP
: /* No map? (Ultrix). */
2749 case N_RSYM
: /* Register variable. */
2750 case N_DEFD
: /* Modula-2 GNU module dependency. */
2751 case N_SSYM
: /* Struct or union element. */
2752 case N_LSYM
: /* Local symbol in stack. */
2753 case N_PSYM
: /* Parameter variable. */
2754 case N_LENG
: /* Length of preceding symbol type. */
2758 const char *colon_pos
= strchr (name
, ':');
2760 if (colon_pos
== NULL
)
2763 deftype
= colon_pos
[1];
2769 /* Deal with the SunPRO 3.0 compiler which omits the
2770 address from N_FUN symbols. */
2772 && valu
== section_offsets
[SECT_OFF_TEXT (objfile
)]
2773 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2775 struct bound_minimal_symbol minsym
2776 = find_stab_function (name
, get_last_source_file (),
2778 if (minsym
.minsym
!= NULL
)
2779 valu
= BMSYMBOL_VALUE_ADDRESS (minsym
);
2782 /* These addresses are absolute. */
2783 function_start_offset
= valu
;
2785 within_function
= 1;
2787 if (get_context_stack_depth () > 1)
2789 complaint (_("unmatched N_LBRAC before symtab pos %d"),
2794 if (!outermost_context_p ())
2796 struct block
*block
;
2798 cstk
= pop_context ();
2799 /* Make a block for the local symbols within. */
2800 block
= finish_block (cstk
.name
,
2801 cstk
.old_blocks
, NULL
,
2802 cstk
.start_addr
, valu
);
2804 /* For C++, set the block's scope. */
2805 if (cstk
.name
->language () == language_cplus
)
2806 cp_set_block_scope (cstk
.name
, block
,
2807 &objfile
->objfile_obstack
);
2810 newobj
= push_context (0, valu
);
2811 newobj
->name
= define_symbol (valu
, name
, desc
, type
, objfile
);
2815 define_symbol (valu
, name
, desc
, type
, objfile
);
2821 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2822 for a bunch of other flags, too. Someday we may parse their
2823 flags; for now we ignore theirs and hope they'll ignore ours. */
2824 case N_OPT
: /* Solaris 2: Compiler options. */
2827 if (strcmp (name
, GCC2_COMPILED_FLAG_SYMBOL
) == 0)
2829 processing_gcc_compilation
= 2;
2836 case N_MAIN
: /* Name of main routine. */
2837 /* FIXME: If one has a symbol file with N_MAIN and then replaces
2838 it with a symbol file with "main" and without N_MAIN. I'm
2839 not sure exactly what rule to follow but probably something
2840 like: N_MAIN takes precedence over "main" no matter what
2841 objfile it is in; If there is more than one N_MAIN, choose
2842 the one in the symfile_objfile; If there is more than one
2843 N_MAIN within a given objfile, complain() and choose
2844 arbitrarily. (kingdon) */
2846 set_objfile_main_name (objfile
, name
, language_unknown
);
2849 /* The following symbol types can be ignored. */
2850 case N_OBJ
: /* Solaris 2: Object file dir and name. */
2851 case N_PATCH
: /* Solaris 2: Patch Run Time Checker. */
2852 /* N_UNDF: Solaris 2: File separator mark. */
2853 /* N_UNDF: -- we will never encounter it, since we only process
2854 one file's symbols at once. */
2855 case N_ENDM
: /* Solaris 2: End of module. */
2856 case N_ALIAS
: /* SunPro F77: alias name, ignore for now. */
2860 /* '#' is a GNU C extension to allow one symbol to refer to another
2863 Generally this is used so that an alias can refer to its main
2868 /* Initialize symbol reference names and determine if this is a
2869 definition. If a symbol reference is being defined, go ahead
2870 and add it. Otherwise, just return. */
2872 const char *s
= name
;
2875 /* If this stab defines a new reference ID that is not on the
2876 reference list, then put it on the reference list.
2878 We go ahead and advance NAME past the reference, even though
2879 it is not strictly necessary at this time. */
2880 refnum
= symbol_reference_defined (&s
);
2882 if (!ref_search (refnum
))
2883 ref_add (refnum
, 0, name
, valu
);
2887 previous_stab_code
= type
;
2890 /* FIXME: The only difference between this and elfstab_build_psymtabs
2891 is the call to install_minimal_symbols for elf, and the support for
2892 split sections. If the differences are really that small, the code
2893 should be shared. */
2895 /* Scan and build partial symbols for an coff symbol file.
2896 The coff file has already been processed to get its minimal symbols.
2898 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2901 OBJFILE is the object file we are reading symbols from.
2902 ADDR is the address relative to which the symbols are (e.g.
2903 the base address of the text segment).
2904 TEXTADDR is the address of the text section.
2905 TEXTSIZE is the size of the text section.
2906 STABSECTS is the list of .stab sections in OBJFILE.
2907 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2908 .stabstr section exists.
2910 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2911 adjusted for coff details. */
2914 coffstab_build_psymtabs (struct objfile
*objfile
,
2915 CORE_ADDR textaddr
, unsigned int textsize
,
2916 const std::vector
<asection
*> &stabsects
,
2917 file_ptr stabstroffset
, unsigned int stabstrsize
)
2920 bfd
*sym_bfd
= objfile
->obfd
;
2921 const char *name
= bfd_get_filename (sym_bfd
);
2922 unsigned int stabsize
;
2924 /* Allocate struct to keep track of stab reading. */
2925 dbx_objfile_data_key
.emplace (objfile
);
2927 DBX_TEXT_ADDR (objfile
) = textaddr
;
2928 DBX_TEXT_SIZE (objfile
) = textsize
;
2930 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2931 DBX_SYMBOL_SIZE (objfile
) = COFF_STABS_SYMBOL_SIZE
;
2932 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
2934 if (stabstrsize
> bfd_get_size (sym_bfd
))
2935 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
2936 DBX_STRINGTAB (objfile
) = (char *)
2937 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
2938 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
2940 /* Now read in the string table in one big gulp. */
2942 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
2944 perror_with_name (name
);
2945 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
2946 if (val
!= stabstrsize
)
2947 perror_with_name (name
);
2949 stabsread_new_init ();
2950 free_header_files ();
2951 init_header_files ();
2953 processing_acc_compilation
= 1;
2955 /* In a coff file, we've already installed the minimal symbols that came
2956 from the coff (non-stab) symbol table, so always act like an
2957 incremental load here. */
2958 scoped_restore save_symbuf_sections
2959 = make_scoped_restore (&symbuf_sections
);
2960 if (stabsects
.size () == 1)
2962 stabsize
= bfd_section_size (stabsects
[0]);
2963 DBX_SYMCOUNT (objfile
) = stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2964 DBX_SYMTAB_OFFSET (objfile
) = stabsects
[0]->filepos
;
2968 DBX_SYMCOUNT (objfile
) = 0;
2969 for (asection
*section
: stabsects
)
2971 stabsize
= bfd_section_size (section
);
2972 DBX_SYMCOUNT (objfile
) += stabsize
/ DBX_SYMBOL_SIZE (objfile
);
2975 DBX_SYMTAB_OFFSET (objfile
) = stabsects
[0]->filepos
;
2978 symbuf_sections
= &stabsects
;
2979 symbuf_left
= bfd_section_size (stabsects
[0]);
2983 dbx_symfile_read (objfile
, 0);
2986 /* Scan and build partial symbols for an ELF symbol file.
2987 This ELF file has already been processed to get its minimal symbols.
2989 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2992 OBJFILE is the object file we are reading symbols from.
2993 ADDR is the address relative to which the symbols are (e.g.
2994 the base address of the text segment).
2995 STABSECT is the BFD section information for the .stab section.
2996 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2997 .stabstr section exists.
2999 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3000 adjusted for elf details. */
3003 elfstab_build_psymtabs (struct objfile
*objfile
, asection
*stabsect
,
3004 file_ptr stabstroffset
, unsigned int stabstrsize
)
3007 bfd
*sym_bfd
= objfile
->obfd
;
3008 const char *name
= bfd_get_filename (sym_bfd
);
3010 stabsread_new_init ();
3012 /* Allocate struct to keep track of stab reading. */
3013 dbx_objfile_data_key
.emplace (objfile
);
3015 /* Find the first and last text address. dbx_symfile_read seems to
3017 find_text_range (sym_bfd
, objfile
);
3019 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3020 DBX_SYMBOL_SIZE (objfile
) = ELF_STABS_SYMBOL_SIZE
;
3021 DBX_SYMCOUNT (objfile
)
3022 = bfd_section_size (stabsect
) / DBX_SYMBOL_SIZE (objfile
);
3023 DBX_STRINGTAB_SIZE (objfile
) = stabstrsize
;
3024 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
;
3025 DBX_STAB_SECTION (objfile
) = stabsect
;
3027 if (stabstrsize
> bfd_get_size (sym_bfd
))
3028 error (_("ridiculous string table size: %d bytes"), stabstrsize
);
3029 DBX_STRINGTAB (objfile
) = (char *)
3030 obstack_alloc (&objfile
->objfile_obstack
, stabstrsize
+ 1);
3031 OBJSTAT (objfile
, sz_strtab
+= stabstrsize
+ 1);
3033 /* Now read in the string table in one big gulp. */
3035 val
= bfd_seek (sym_bfd
, stabstroffset
, SEEK_SET
);
3037 perror_with_name (name
);
3038 val
= bfd_bread (DBX_STRINGTAB (objfile
), stabstrsize
, sym_bfd
);
3039 if (val
!= stabstrsize
)
3040 perror_with_name (name
);
3042 stabsread_new_init ();
3043 free_header_files ();
3044 init_header_files ();
3046 processing_acc_compilation
= 1;
3049 symbuf_left
= bfd_section_size (stabsect
);
3051 scoped_restore restore_stabs_data
= make_scoped_restore (&stabs_data
);
3052 gdb::unique_xmalloc_ptr
<gdb_byte
> data_holder
;
3054 stabs_data
= symfile_relocate_debug_section (objfile
, stabsect
, NULL
);
3056 data_holder
.reset (stabs_data
);
3058 /* In an elf file, we've already installed the minimal symbols that came
3059 from the elf (non-stab) symbol table, so always act like an
3060 incremental load here. dbx_symfile_read should not generate any new
3061 minimal symbols, since we will have already read the ELF dynamic symbol
3062 table and normal symbol entries won't be in the ".stab" section; but in
3063 case it does, it will install them itself. */
3064 dbx_symfile_read (objfile
, 0);
3067 /* Scan and build partial symbols for a file with special sections for stabs
3068 and stabstrings. The file has already been processed to get its minimal
3069 symbols, and any other symbols that might be necessary to resolve GSYMs.
3071 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3074 OBJFILE is the object file we are reading symbols from.
3075 ADDR is the address relative to which the symbols are (e.g. the base address
3076 of the text segment).
3077 STAB_NAME is the name of the section that contains the stabs.
3078 STABSTR_NAME is the name of the section that contains the stab strings.
3080 This routine is mostly copied from dbx_symfile_init and
3081 dbx_symfile_read. */
3084 stabsect_build_psymtabs (struct objfile
*objfile
, char *stab_name
,
3085 char *stabstr_name
, char *text_name
)
3088 bfd
*sym_bfd
= objfile
->obfd
;
3089 const char *name
= bfd_get_filename (sym_bfd
);
3091 asection
*stabstrsect
;
3092 asection
*text_sect
;
3094 stabsect
= bfd_get_section_by_name (sym_bfd
, stab_name
);
3095 stabstrsect
= bfd_get_section_by_name (sym_bfd
, stabstr_name
);
3101 error (_("stabsect_build_psymtabs: Found stabs (%s), "
3102 "but not string section (%s)"),
3103 stab_name
, stabstr_name
);
3105 dbx_objfile_data_key
.emplace (objfile
);
3107 text_sect
= bfd_get_section_by_name (sym_bfd
, text_name
);
3109 error (_("Can't find %s section in symbol file"), text_name
);
3110 DBX_TEXT_ADDR (objfile
) = bfd_section_vma (text_sect
);
3111 DBX_TEXT_SIZE (objfile
) = bfd_section_size (text_sect
);
3113 DBX_SYMBOL_SIZE (objfile
) = sizeof (struct external_nlist
);
3114 DBX_SYMCOUNT (objfile
) = bfd_section_size (stabsect
)
3115 / DBX_SYMBOL_SIZE (objfile
);
3116 DBX_STRINGTAB_SIZE (objfile
) = bfd_section_size (stabstrsect
);
3117 DBX_SYMTAB_OFFSET (objfile
) = stabsect
->filepos
; /* XXX - FIXME: POKING
3121 if (DBX_STRINGTAB_SIZE (objfile
) > bfd_get_size (sym_bfd
))
3122 error (_("ridiculous string table size: %d bytes"),
3123 DBX_STRINGTAB_SIZE (objfile
));
3124 DBX_STRINGTAB (objfile
) = (char *)
3125 obstack_alloc (&objfile
->objfile_obstack
,
3126 DBX_STRINGTAB_SIZE (objfile
) + 1);
3127 OBJSTAT (objfile
, sz_strtab
+= DBX_STRINGTAB_SIZE (objfile
) + 1);
3129 /* Now read in the string table in one big gulp. */
3131 val
= bfd_get_section_contents (sym_bfd
, /* bfd */
3132 stabstrsect
, /* bfd section */
3133 DBX_STRINGTAB (objfile
), /* input buffer */
3134 0, /* offset into section */
3135 DBX_STRINGTAB_SIZE (objfile
)); /* amount to
3139 perror_with_name (name
);
3141 stabsread_new_init ();
3142 free_header_files ();
3143 init_header_files ();
3145 /* Now, do an incremental load. */
3147 processing_acc_compilation
= 1;
3148 dbx_symfile_read (objfile
, 0);
3151 static const struct sym_fns aout_sym_fns
=
3153 dbx_new_init
, /* init anything gbl to entire symtab */
3154 dbx_symfile_init
, /* read initial info, setup for sym_read() */
3155 dbx_symfile_read
, /* read a symbol file into symtab */
3156 NULL
, /* sym_read_psymbols */
3157 dbx_symfile_finish
, /* finished with file, cleanup */
3158 default_symfile_offsets
, /* parse user's offsets to internal form */
3159 default_symfile_segments
, /* Get segment information from a file. */
3161 default_symfile_relocate
, /* Relocate a debug section. */
3162 NULL
, /* sym_probe_fns */
3166 void _initialize_dbxread ();
3168 _initialize_dbxread ()
3170 add_symtab_fns (bfd_target_aout_flavour
, &aout_sym_fns
);