1 /* Generic symbol-table support for the BFD library.
2 Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 1997
3 Free Software Foundation, Inc.
4 Written by Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 BFD tries to maintain as much symbol information as it can when
27 it moves information from file to file. BFD passes information
28 to applications though the <<asymbol>> structure. When the
29 application requests the symbol table, BFD reads the table in
30 the native form and translates parts of it into the internal
31 format. To maintain more than the information passed to
32 applications, some targets keep some information ``behind the
33 scenes'' in a structure only the particular back end knows
34 about. For example, the coff back end keeps the original
35 symbol table structure as well as the canonical structure when
36 a BFD is read in. On output, the coff back end can reconstruct
37 the output symbol table so that no information is lost, even
38 information unique to coff which BFD doesn't know or
39 understand. If a coff symbol table were read, but were written
40 through an a.out back end, all the coff specific information
41 would be lost. The symbol table of a BFD
42 is not necessarily read in until a canonicalize request is
43 made. Then the BFD back end fills in a table provided by the
44 application with pointers to the canonical information. To
45 output symbols, the application provides BFD with a table of
46 pointers to pointers to <<asymbol>>s. This allows applications
47 like the linker to output a symbol as it was read, since the ``behind
48 the scenes'' information will be still available.
54 @* symbol handling functions::
58 Reading Symbols, Writing Symbols, Symbols, Symbols
62 There are two stages to reading a symbol table from a BFD:
63 allocating storage, and the actual reading process. This is an
64 excerpt from an application which reads the symbol table:
66 | long storage_needed;
67 | asymbol **symbol_table;
68 | long number_of_symbols;
71 | storage_needed = bfd_get_symtab_upper_bound (abfd);
73 | if (storage_needed < 0)
76 | if (storage_needed == 0) {
79 | symbol_table = (asymbol **) xmalloc (storage_needed);
82 | bfd_canonicalize_symtab (abfd, symbol_table);
84 | if (number_of_symbols < 0)
87 | for (i = 0; i < number_of_symbols; i++) {
88 | process_symbol (symbol_table[i]);
91 All storage for the symbols themselves is in an obstack
92 connected to the BFD; it is freed when the BFD is closed.
96 Writing Symbols, Mini Symbols, Reading Symbols, Symbols
100 Writing of a symbol table is automatic when a BFD open for
101 writing is closed. The application attaches a vector of
102 pointers to pointers to symbols to the BFD being written, and
103 fills in the symbol count. The close and cleanup code reads
104 through the table provided and performs all the necessary
105 operations. The BFD output code must always be provided with an
106 ``owned'' symbol: one which has come from another BFD, or one
107 which has been created using <<bfd_make_empty_symbol>>. Here is an
108 example showing the creation of a symbol table with only one element:
117 | abfd = bfd_openw("foo","a.out-sunos-big");
118 | bfd_set_format(abfd, bfd_object);
119 | new = bfd_make_empty_symbol(abfd);
120 | new->name = "dummy_symbol";
121 | new->section = bfd_make_section_old_way(abfd, ".text");
122 | new->flags = BSF_GLOBAL;
123 | new->value = 0x12345;
126 | ptrs[1] = (asymbol *)0;
128 | bfd_set_symtab(abfd, ptrs, 1);
134 | 00012345 A dummy_symbol
136 Many formats cannot represent arbitary symbol information; for
137 instance, the <<a.out>> object format does not allow an
138 arbitary number of sections. A symbol pointing to a section
139 which is not one of <<.text>>, <<.data>> or <<.bss>> cannot
143 Mini Symbols, typedef asymbol, Writing Symbols, Symbols
147 Mini symbols provide read-only access to the symbol table.
148 They use less memory space, but require more time to access.
149 They can be useful for tools like nm or objdump, which may
150 have to handle symbol tables of extremely large executables.
152 The <<bfd_read_minisymbols>> function will read the symbols
153 into memory in an internal form. It will return a <<void *>>
154 pointer to a block of memory, a symbol count, and the size of
155 each symbol. The pointer is allocated using <<malloc>>, and
156 should be freed by the caller when it is no longer needed.
158 The function <<bfd_minisymbol_to_symbol>> will take a pointer
159 to a minisymbol, and a pointer to a structure returned by
160 <<bfd_make_empty_symbol>>, and return a <<asymbol>> structure.
161 The return value may or may not be the same as the value from
162 <<bfd_make_empty_symbol>> which was passed in.
171 typedef asymbol, symbol handling functions, Mini Symbols, Symbols
178 An <<asymbol>> has the form:
186 .typedef struct symbol_cache_entry
188 . {* A pointer to the BFD which owns the symbol. This information
189 . is necessary so that a back end can work out what additional
190 . information (invisible to the application writer) is carried
193 . This field is *almost* redundant, since you can use section->owner
194 . instead, except that some symbols point to the global sections
195 . bfd_{abs,com,und}_section. This could be fixed by making
196 . these globals be per-bfd (or per-target-flavor). FIXME. *}
198 . struct _bfd *the_bfd; {* Use bfd_asymbol_bfd(sym) to access this field. *}
200 . {* The text of the symbol. The name is left alone, and not copied; the
201 . application may not alter it. *}
204 . {* The value of the symbol. This really should be a union of a
205 . numeric value with a pointer, since some flags indicate that
206 . a pointer to another symbol is stored here. *}
209 . {* Attributes of a symbol: *}
211 .#define BSF_NO_FLAGS 0x00
213 . {* The symbol has local scope; <<static>> in <<C>>. The value
214 . is the offset into the section of the data. *}
215 .#define BSF_LOCAL 0x01
217 . {* The symbol has global scope; initialized data in <<C>>. The
218 . value is the offset into the section of the data. *}
219 .#define BSF_GLOBAL 0x02
221 . {* The symbol has global scope and is exported. The value is
222 . the offset into the section of the data. *}
223 .#define BSF_EXPORT BSF_GLOBAL {* no real difference *}
225 . {* A normal C symbol would be one of:
226 . <<BSF_LOCAL>>, <<BSF_FORT_COMM>>, <<BSF_UNDEFINED>> or
229 . {* The symbol is a debugging record. The value has an arbitary
231 .#define BSF_DEBUGGING 0x08
233 . {* The symbol denotes a function entry point. Used in ELF,
234 . perhaps others someday. *}
235 .#define BSF_FUNCTION 0x10
237 . {* Used by the linker. *}
238 .#define BSF_KEEP 0x20
239 .#define BSF_KEEP_G 0x40
241 . {* A weak global symbol, overridable without warnings by
242 . a regular global symbol of the same name. *}
243 .#define BSF_WEAK 0x80
245 . {* This symbol was created to point to a section, e.g. ELF's
246 . STT_SECTION symbols. *}
247 .#define BSF_SECTION_SYM 0x100
249 . {* The symbol used to be a common symbol, but now it is
251 .#define BSF_OLD_COMMON 0x200
253 . {* The default value for common data. *}
254 .#define BFD_FORT_COMM_DEFAULT_VALUE 0
256 . {* In some files the type of a symbol sometimes alters its
257 . location in an output file - ie in coff a <<ISFCN>> symbol
258 . which is also <<C_EXT>> symbol appears where it was
259 . declared and not at the end of a section. This bit is set
260 . by the target BFD part to convey this information. *}
262 .#define BSF_NOT_AT_END 0x400
264 . {* Signal that the symbol is the label of constructor section. *}
265 .#define BSF_CONSTRUCTOR 0x800
267 . {* Signal that the symbol is a warning symbol. The name is a
268 . warning. The name of the next symbol is the one to warn about;
269 . if a reference is made to a symbol with the same name as the next
270 . symbol, a warning is issued by the linker. *}
271 .#define BSF_WARNING 0x1000
273 . {* Signal that the symbol is indirect. This symbol is an indirect
274 . pointer to the symbol with the same name as the next symbol. *}
275 .#define BSF_INDIRECT 0x2000
277 . {* BSF_FILE marks symbols that contain a file name. This is used
278 . for ELF STT_FILE symbols. *}
279 .#define BSF_FILE 0x4000
281 . {* Symbol is from dynamic linking information. *}
282 .#define BSF_DYNAMIC 0x8000
284 . {* The symbol denotes a data object. Used in ELF, and perhaps
286 .#define BSF_OBJECT 0x10000
290 . {* A pointer to the section to which this symbol is
291 . relative. This will always be non NULL, there are special
292 . sections for undefined and absolute symbols. *}
293 . struct sec *section;
295 . {* Back end special data. *}
309 #include "aout/stab_gnu.h"
311 static char coff_section_type
PARAMS ((const char *));
316 symbol handling functions, , typedef asymbol, Symbols
318 Symbol handling functions
323 bfd_get_symtab_upper_bound
326 Return the number of bytes required to store a vector of pointers
327 to <<asymbols>> for all the symbols in the BFD @var{abfd},
328 including a terminal NULL pointer. If there are no symbols in
329 the BFD, then return 0. If an error occurs, return -1.
331 .#define bfd_get_symtab_upper_bound(abfd) \
332 . BFD_SEND (abfd, _bfd_get_symtab_upper_bound, (abfd))
341 boolean bfd_is_local_label(bfd *abfd, asymbol *sym);
344 Return true if the given symbol @var{sym} in the BFD @var{abfd} is
345 a compiler generated local label, else return false.
349 bfd_is_local_label (abfd
, sym
)
353 if ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0)
355 return bfd_is_local_label_name (abfd
, sym
->name
);
360 bfd_is_local_label_name
363 boolean bfd_is_local_label_name(bfd *abfd, const char *name);
366 Return true if a symbol with the name @var{name} in the BFD
367 @var{abfd} is a compiler generated local label, else return
368 false. This just checks whether the name has the form of a
371 .#define bfd_is_local_label_name(abfd, name) \
372 . BFD_SEND (abfd, _bfd_is_local_label_name, (abfd, name))
377 bfd_canonicalize_symtab
380 Read the symbols from the BFD @var{abfd}, and fills in
381 the vector @var{location} with pointers to the symbols and
383 Return the actual number of symbol pointers, not
387 .#define bfd_canonicalize_symtab(abfd, location) \
388 . BFD_SEND (abfd, _bfd_canonicalize_symtab,\
399 boolean bfd_set_symtab (bfd *abfd, asymbol **location, unsigned int count);
402 Arrange that when the output BFD @var{abfd} is closed,
403 the table @var{location} of @var{count} pointers to symbols
408 bfd_set_symtab (abfd
, location
, symcount
)
411 unsigned int symcount
;
413 if ((abfd
->format
!= bfd_object
) || (bfd_read_p (abfd
)))
415 bfd_set_error (bfd_error_invalid_operation
);
419 bfd_get_outsymbols (abfd
) = location
;
420 bfd_get_symcount (abfd
) = symcount
;
426 bfd_print_symbol_vandf
429 void bfd_print_symbol_vandf(PTR file, asymbol *symbol);
432 Print the value and flags of the @var{symbol} supplied to the
436 bfd_print_symbol_vandf (arg
, symbol
)
440 FILE *file
= (FILE *) arg
;
441 flagword type
= symbol
->flags
;
442 if (symbol
->section
!= (asection
*) NULL
)
444 fprintf_vma (file
, symbol
->value
+ symbol
->section
->vma
);
448 fprintf_vma (file
, symbol
->value
);
451 /* This presumes that a symbol can not be both BSF_DEBUGGING and
452 BSF_DYNAMIC, nor more than one of BSF_FUNCTION, BSF_FILE, and
454 fprintf (file
, " %c%c%c%c%c%c%c",
456 ? (type
& BSF_GLOBAL
) ? '!' : 'l'
457 : (type
& BSF_GLOBAL
) ? 'g' : ' '),
458 (type
& BSF_WEAK
) ? 'w' : ' ',
459 (type
& BSF_CONSTRUCTOR
) ? 'C' : ' ',
460 (type
& BSF_WARNING
) ? 'W' : ' ',
461 (type
& BSF_INDIRECT
) ? 'I' : ' ',
462 (type
& BSF_DEBUGGING
) ? 'd' : (type
& BSF_DYNAMIC
) ? 'D' : ' ',
463 ((type
& BSF_FUNCTION
)
467 : ((type
& BSF_OBJECT
) ? 'O' : ' '))));
473 bfd_make_empty_symbol
476 Create a new <<asymbol>> structure for the BFD @var{abfd}
477 and return a pointer to it.
479 This routine is necessary because each back end has private
480 information surrounding the <<asymbol>>. Building your own
481 <<asymbol>> and pointing to it will not create the private
482 information, and will cause problems later on.
484 .#define bfd_make_empty_symbol(abfd) \
485 . BFD_SEND (abfd, _bfd_make_empty_symbol, (abfd))
490 bfd_make_debug_symbol
493 Create a new <<asymbol>> structure for the BFD @var{abfd},
494 to be used as a debugging symbol. Further details of its use have
495 yet to be worked out.
497 .#define bfd_make_debug_symbol(abfd,ptr,size) \
498 . BFD_SEND (abfd, _bfd_make_debug_symbol, (abfd, ptr, size))
501 struct section_to_type
507 /* Map section names to POSIX/BSD single-character symbol types.
508 This table is probably incomplete. It is sorted for convenience of
509 adding entries. Since it is so short, a linear search is used. */
510 static CONST
struct section_to_type stt
[] =
514 {"zerovars", 'b'}, /* MRI .bss */
516 {"vars", 'd'}, /* MRI .data */
517 {".rdata", 'r'}, /* Read only data. */
518 {".rodata", 'r'}, /* Read only data. */
519 {".sbss", 's'}, /* Small BSS (uninitialized data). */
520 {".scommon", 'c'}, /* Small common. */
521 {".sdata", 'g'}, /* Small initialized data. */
523 {"code", 't'}, /* MRI .text */
527 /* Return the single-character symbol type corresponding to
528 section S, or '?' for an unknown COFF section.
530 Check for any leading string which matches, so .text5 returns
531 't' as well as .text */
534 coff_section_type (s
)
537 CONST
struct section_to_type
*t
;
539 for (t
= &stt
[0]; t
->section
; t
++)
540 if (!strncmp (s
, t
->section
, strlen (t
->section
)))
547 #define islower(c) ((c) >= 'a' && (c) <= 'z')
550 #define toupper(c) (islower(c) ? ((c) & ~0x20) : (c))
558 Return a character corresponding to the symbol
559 class of @var{symbol}, or '?' for an unknown class.
562 int bfd_decode_symclass(asymbol *symbol);
565 bfd_decode_symclass (symbol
)
570 if (bfd_is_com_section (symbol
->section
))
572 if (bfd_is_und_section (symbol
->section
))
574 if (bfd_is_ind_section (symbol
->section
))
576 if (symbol
->flags
& BSF_WEAK
)
578 if (!(symbol
->flags
& (BSF_GLOBAL
| BSF_LOCAL
)))
581 if (bfd_is_abs_section (symbol
->section
))
583 else if (symbol
->section
)
584 c
= coff_section_type (symbol
->section
->name
);
587 if (symbol
->flags
& BSF_GLOBAL
)
591 /* We don't have to handle these cases just yet, but we will soon:
606 Fill in the basic info about symbol that nm needs.
607 Additional info may be added by the back-ends after
608 calling this function.
611 void bfd_symbol_info(asymbol *symbol, symbol_info *ret);
615 bfd_symbol_info (symbol
, ret
)
619 ret
->type
= bfd_decode_symclass (symbol
);
620 if (ret
->type
!= 'U')
621 ret
->value
= symbol
->value
+ symbol
->section
->vma
;
624 ret
->name
= symbol
->name
;
628 bfd_symbol_is_absolute ()
635 bfd_copy_private_symbol_data
638 boolean bfd_copy_private_symbol_data(bfd *ibfd, asymbol *isym, bfd *obfd, asymbol *osym);
641 Copy private symbol information from @var{isym} in the BFD
642 @var{ibfd} to the symbol @var{osym} in the BFD @var{obfd}.
643 Return <<true>> on success, <<false>> on error. Possible error
646 o <<bfd_error_no_memory>> -
647 Not enough memory exists to create private data for @var{osec}.
649 .#define bfd_copy_private_symbol_data(ibfd, isymbol, obfd, osymbol) \
650 . BFD_SEND (obfd, _bfd_copy_private_symbol_data, \
651 . (ibfd, isymbol, obfd, osymbol))
655 /* The generic version of the function which returns mini symbols.
656 This is used when the backend does not provide a more efficient
657 version. It just uses BFD asymbol structures as mini symbols. */
660 _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
)
667 asymbol
**syms
= NULL
;
671 storage
= bfd_get_dynamic_symtab_upper_bound (abfd
);
673 storage
= bfd_get_symtab_upper_bound (abfd
);
677 syms
= (asymbol
**) bfd_malloc ((size_t) storage
);
682 symcount
= bfd_canonicalize_dynamic_symtab (abfd
, syms
);
684 symcount
= bfd_canonicalize_symtab (abfd
, syms
);
688 *minisymsp
= (PTR
) syms
;
689 *sizep
= sizeof (asymbol
*);
698 /* The generic version of the function which converts a minisymbol to
699 an asymbol. We don't worry about the sym argument we are passed;
700 we just return the asymbol the minisymbol points to. */
704 _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
)
710 return *(asymbol
**) minisym
;
713 /* Look through stabs debugging information in .stab and .stabstr
714 sections to find the source file and line closest to a desired
715 location. This is used by COFF and ELF targets. It sets *pfound
716 to true if it finds some information. The *pinfo field is used to
717 pass cached information in and out of this routine; this first time
718 the routine is called for a BFD, *pinfo should be NULL. The value
719 placed in *pinfo should be saved with the BFD, and passed back each
720 time this function is called. */
722 /* A pointer to this structure is stored in *pinfo. */
724 struct stab_find_info
726 /* The .stab section. */
728 /* The .stabstr section. */
730 /* The contents of the .stab section. */
732 /* The contents of the .stabstr section. */
734 /* An malloc buffer to hold the file name. */
736 /* Cached values to restart quickly. */
737 bfd_vma cached_offset
;
738 bfd_byte
*cached_stab
;
739 bfd_byte
*cached_str
;
740 bfd_size_type cached_stroff
;
744 _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
, pfound
,
745 pfilename
, pfnname
, pline
, pinfo
)
751 const char **pfilename
;
752 const char **pfnname
;
756 struct stab_find_info
*info
;
757 bfd_size_type stabsize
, strsize
;
758 bfd_byte
*stab
, *stabend
, *str
;
759 bfd_size_type stroff
;
761 char *directory_name
, *main_file_name
, *current_file_name
, *line_file_name
;
763 bfd_vma low_func_vma
, low_line_vma
;
766 *pfilename
= bfd_get_filename (abfd
);
770 info
= (struct stab_find_info
*) *pinfo
;
773 if (info
->stabsec
== NULL
|| info
->strsec
== NULL
)
775 /* No stabs debugging information. */
779 stabsize
= info
->stabsec
->_raw_size
;
780 strsize
= info
->strsec
->_raw_size
;
784 long reloc_size
, reloc_count
;
785 arelent
**reloc_vector
;
787 info
= (struct stab_find_info
*) bfd_zalloc (abfd
, sizeof *info
);
791 /* FIXME: When using the linker --split-by-file or
792 --split-by-reloc options, it is possible for the .stab and
793 .stabstr sections to be split. We should handle that. */
795 info
->stabsec
= bfd_get_section_by_name (abfd
, ".stab");
796 info
->strsec
= bfd_get_section_by_name (abfd
, ".stabstr");
798 if (info
->stabsec
== NULL
|| info
->strsec
== NULL
)
800 /* No stabs debugging information. Set *pinfo so that we
801 can return quickly in the info != NULL case above. */
806 stabsize
= info
->stabsec
->_raw_size
;
807 strsize
= info
->strsec
->_raw_size
;
809 info
->stabs
= (bfd_byte
*) bfd_alloc (abfd
, stabsize
);
810 info
->strs
= (bfd_byte
*) bfd_alloc (abfd
, strsize
);
811 if (info
->stabs
== NULL
|| info
->strs
== NULL
)
814 if (! bfd_get_section_contents (abfd
, info
->stabsec
, info
->stabs
, 0,
816 || ! bfd_get_section_contents (abfd
, info
->strsec
, info
->strs
, 0,
820 /* If this is a relocateable object file, we have to relocate
821 the entries in .stab. This should always be simple 32 bit
822 relocations against symbols defined in this object file, so
823 this should be no big deal. */
824 reloc_size
= bfd_get_reloc_upper_bound (abfd
, info
->stabsec
);
827 reloc_vector
= (arelent
**) bfd_malloc (reloc_size
);
828 if (reloc_vector
== NULL
&& reloc_size
!= 0)
830 reloc_count
= bfd_canonicalize_reloc (abfd
, info
->stabsec
, reloc_vector
,
834 if (reloc_vector
!= NULL
)
842 for (pr
= reloc_vector
; *pr
!= NULL
; pr
++)
849 if (r
->howto
->rightshift
!= 0
850 || r
->howto
->size
!= 2
851 || r
->howto
->bitsize
!= 32
852 || r
->howto
->pc_relative
853 || r
->howto
->bitpos
!= 0
854 || r
->howto
->dst_mask
!= 0xffffffff)
856 (*_bfd_error_handler
)
857 ("Unsupported .stab relocation");
858 bfd_set_error (bfd_error_invalid_operation
);
859 if (reloc_vector
!= NULL
)
864 val
= bfd_get_32 (abfd
, info
->stabs
+ r
->address
);
865 val
&= r
->howto
->src_mask
;
866 sym
= *r
->sym_ptr_ptr
;
867 val
+= sym
->value
+ sym
->section
->vma
+ r
->addend
;
868 bfd_put_32 (abfd
, val
, info
->stabs
+ r
->address
);
872 if (reloc_vector
!= NULL
)
878 /* We are passed a section relative offset. The offsets in the
879 stabs information are absolute. */
880 offset
+= bfd_get_section_vma (abfd
, section
);
882 /* Stabs entries use a 12 byte format:
883 4 byte string table index
885 1 byte stab other field
886 2 byte stab desc field
888 FIXME: This will have to change for a 64 bit object format.
890 The stabs symbols are divided into compilation units. For the
891 first entry in each unit, the type of 0, the value is the length
892 of the string table for this unit, and the desc field is the
893 number of stabs symbols for this unit. */
900 #define STABSIZE (12)
902 /* It would be nice if we could skip ahead to the stabs symbols for
903 the next compilation unit to quickly scan through the compilation
904 units. Unfortunately, since each line number gets a separate
905 stabs entry, it is entirely plausible that a large source file
906 will overflow the 16 bit count of stabs entries. */
908 directory_name
= NULL
;
909 main_file_name
= NULL
;
910 current_file_name
= NULL
;
911 line_file_name
= NULL
;
916 stabend
= info
->stabs
+ stabsize
;
918 if (info
->cached_stab
== NULL
|| offset
< info
->cached_offset
)
926 stab
= info
->cached_stab
;
927 str
= info
->cached_str
;
928 stroff
= info
->cached_stroff
;
931 info
->cached_offset
= offset
;
933 for (; stab
< stabend
; stab
+= STABSIZE
)
941 switch (stab
[TYPEOFF
])
944 /* This is the first entry in a compilation unit. */
945 if ((bfd_size_type
) ((info
->strs
+ strsize
) - str
) < stroff
)
951 stroff
= bfd_get_32 (abfd
, stab
+ VALOFF
);
955 /* The main file name. */
957 val
= bfd_get_32 (abfd
, stab
+ VALOFF
);
964 name
= (char *) str
+ bfd_get_32 (abfd
, stab
+ STRDXOFF
);
966 /* An empty string indicates the end of the compilation
970 /* If there are functions in different sections, they
971 may have addresses larger than val, but we don't want
972 to forget the file name. When there are functions in
973 different cases, there is supposed to be an N_FUN at
974 the end of the function indicating where it ends. */
975 if (low_func_vma
< val
|| fnname
== NULL
)
976 main_file_name
= NULL
;
980 /* We know that we have to get to at least this point in the
981 stabs entries for this offset. */
982 info
->cached_stab
= stab
;
983 info
->cached_str
= str
;
984 info
->cached_stroff
= stroff
;
986 current_file_name
= name
;
988 /* Look ahead to the next symbol. Two consecutive N_SO
989 symbols are a directory and a file name. */
990 if (stab
+ STABSIZE
>= stabend
991 || *(stab
+ STABSIZE
+ TYPEOFF
) != N_SO
)
992 directory_name
= NULL
;
996 directory_name
= current_file_name
;
997 current_file_name
= ((char *) str
998 + bfd_get_32 (abfd
, stab
+ STRDXOFF
));
1001 main_file_name
= current_file_name
;
1006 /* The name of an include file. */
1007 current_file_name
= ((char *) str
1008 + bfd_get_32 (abfd
, stab
+ STRDXOFF
));
1014 /* A line number. The value is relative to the start of the
1015 current function. */
1016 val
= fnaddr
+ bfd_get_32 (abfd
, stab
+ VALOFF
);
1017 if (val
>= low_line_vma
&& val
<= offset
)
1019 *pline
= bfd_get_16 (abfd
, stab
+ DESCOFF
);
1021 line_file_name
= current_file_name
;
1026 /* A function name. */
1027 val
= bfd_get_32 (abfd
, stab
+ VALOFF
);
1028 name
= (char *) str
+ bfd_get_32 (abfd
, stab
+ STRDXOFF
);
1030 /* An empty string here indicates the end of a function, and
1031 the value is relative to fnaddr. */
1036 if (val
>= low_func_vma
&& val
< offset
)
1041 if (val
>= low_func_vma
&& val
<= offset
)
1057 if (main_file_name
== NULL
)
1059 /* No information found. */
1066 main_file_name
= line_file_name
;
1068 if (main_file_name
!= NULL
)
1070 if (main_file_name
[0] == '/' || directory_name
== NULL
)
1071 *pfilename
= main_file_name
;
1076 dirlen
= strlen (directory_name
);
1077 if (info
->filename
== NULL
1078 || strncmp (info
->filename
, directory_name
, dirlen
) != 0
1079 || strcmp (info
->filename
+ dirlen
, main_file_name
) != 0)
1081 if (info
->filename
!= NULL
)
1082 free (info
->filename
);
1083 info
->filename
= (char *) bfd_malloc (dirlen
+
1084 strlen (main_file_name
)
1086 if (info
->filename
== NULL
)
1088 strcpy (info
->filename
, directory_name
);
1089 strcpy (info
->filename
+ dirlen
, main_file_name
);
1092 *pfilename
= info
->filename
;
1100 /* This will typically be something like main:F(0,1), so we want
1101 to clobber the colon. It's OK to change the name, since the
1102 string is in our own local storage anyhow. */
1104 s
= strchr (fnname
, ':');