1 /* Read coff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu).
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "breakpoint.h"
29 #include "gdb_obstack.h"
31 #include "gdb_string.h"
34 #include "coff/internal.h" /* Internal format of COFF symbols in BFD */
35 #include "libcoff.h" /* FIXME secret internal data from BFD */
38 #include "gdb-stabs.h"
39 #include "stabsread.h"
40 #include "complaints.h"
42 #include "gdb_assert.h"
44 #include "dictionary.h"
46 #include "coff-pe-read.h"
48 extern void _initialize_coffread (void);
50 struct coff_symfile_info
52 file_ptr min_lineno_offset
; /* Where in file lowest line#s are */
53 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file */
55 CORE_ADDR textaddr
; /* Addr of .text section. */
56 unsigned int textsize
; /* Size of .text section. */
57 struct stab_section_list
*stabsects
; /* .stab sections. */
58 asection
*stabstrsect
; /* Section pointer for .stab section */
62 /* Translate an external name string into a user-visible name. */
63 #define EXTERNAL_NAME(string, abfd) \
64 (string[0] == bfd_get_symbol_leading_char(abfd)? string+1: string)
66 /* To be an sdb debug type, type must have at least a basic or primary
67 derived type. Using this rather than checking against T_NULL is
68 said to prevent core dumps if we try to operate on Michael Bloom
71 #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK))
73 /* Core address of start and end of text of current source file.
74 This comes from a ".text" symbol where x_nlinno > 0. */
76 static CORE_ADDR current_source_start_addr
;
77 static CORE_ADDR current_source_end_addr
;
79 /* The addresses of the symbol table stream and number of symbols
80 of the object file we are reading (as copied into core). */
82 static bfd
*nlist_bfd_global
;
83 static int nlist_nsyms_global
;
86 /* Pointers to scratch storage, used for reading raw symbols and auxents. */
88 static char *temp_sym
;
89 static char *temp_aux
;
91 /* Local variables that hold the shift and mask values for the
92 COFF file that we are currently reading. These come back to us
93 from BFD, and are referenced by their macro names, as well as
94 internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
95 macros from include/coff/internal.h . */
97 static unsigned local_n_btmask
;
98 static unsigned local_n_btshft
;
99 static unsigned local_n_tmask
;
100 static unsigned local_n_tshift
;
102 #define N_BTMASK local_n_btmask
103 #define N_BTSHFT local_n_btshft
104 #define N_TMASK local_n_tmask
105 #define N_TSHIFT local_n_tshift
107 /* Local variables that hold the sizes in the file of various COFF structures.
108 (We only need to know this to read them from the file -- BFD will then
109 translate the data in them, into `internal_xxx' structs in the right
110 byte order, alignment, etc.) */
112 static unsigned local_linesz
;
113 static unsigned local_symesz
;
114 static unsigned local_auxesz
;
116 /* This is set if this is a PE format file. */
120 /* Chain of typedefs of pointers to empty struct/union types.
121 They are chained thru the SYMBOL_VALUE_CHAIN. */
123 static struct symbol
*opaque_type_chain
[HASHSIZE
];
125 /* Simplified internal version of coff symbol table information */
130 int c_symnum
; /* symbol number of this entry */
131 int c_naux
; /* 0 if syment only, 1 if syment + auxent, etc */
138 extern void stabsread_clear_cache (void);
140 static struct type
*coff_read_struct_type (int, int, int,
143 static struct type
*decode_base_type (struct coff_symbol
*,
144 unsigned int, union internal_auxent
*,
147 static struct type
*decode_type (struct coff_symbol
*, unsigned int,
148 union internal_auxent
*,
151 static struct type
*decode_function_type (struct coff_symbol
*,
153 union internal_auxent
*,
156 static struct type
*coff_read_enum_type (int, int, int,
159 static struct symbol
*process_coff_symbol (struct coff_symbol
*,
160 union internal_auxent
*,
163 static void patch_opaque_types (struct symtab
*);
165 static void enter_linenos (long, int, int, struct objfile
*);
167 static void free_linetab (void);
169 static void free_linetab_cleanup (void *ignore
);
171 static int init_lineno (bfd
*, long, int);
173 static char *getsymname (struct internal_syment
*);
175 static char *coff_getfilename (union internal_auxent
*);
177 static void free_stringtab (void);
179 static void free_stringtab_cleanup (void *ignore
);
181 static int init_stringtab (bfd
*, long);
183 static void read_one_sym (struct coff_symbol
*,
184 struct internal_syment
*, union internal_auxent
*);
186 static void coff_symtab_read (long, unsigned int, struct objfile
*);
188 /* We are called once per section from coff_symfile_read. We
189 need to examine each section we are passed, check to see
190 if it is something we are interested in processing, and
191 if so, stash away some access information for the section.
193 FIXME: The section names should not be hardwired strings (what
194 should they be? I don't think most object file formats have enough
195 section flags to specify what kind of debug section it is
199 coff_locate_sections (bfd
*abfd
, asection
*sectp
, void *csip
)
201 struct coff_symfile_info
*csi
;
204 csi
= (struct coff_symfile_info
*) csip
;
205 name
= bfd_get_section_name (abfd
, sectp
);
206 if (strcmp (name
, ".text") == 0)
208 csi
->textaddr
= bfd_section_vma (abfd
, sectp
);
209 csi
->textsize
+= bfd_section_size (abfd
, sectp
);
211 else if (strncmp (name
, ".text", sizeof ".text" - 1) == 0)
213 csi
->textsize
+= bfd_section_size (abfd
, sectp
);
215 else if (strcmp (name
, ".stabstr") == 0)
217 csi
->stabstrsect
= sectp
;
219 else if (strncmp (name
, ".stab", sizeof ".stab" - 1) == 0)
223 /* We can have multiple .stab sections if linked with
225 for (s
= name
+ sizeof ".stab" - 1; *s
!= '\0'; s
++)
230 struct stab_section_list
*n
, **pn
;
232 n
= ((struct stab_section_list
*)
233 xmalloc (sizeof (struct stab_section_list
)));
236 for (pn
= &csi
->stabsects
; *pn
!= NULL
; pn
= &(*pn
)->next
)
240 /* This will be run after coffstab_build_psymtabs is called
241 in coff_symfile_read, at which point we no longer need
243 make_cleanup (xfree
, n
);
248 /* Return the section_offsets* that CS points to. */
249 static int cs_to_section (struct coff_symbol
*, struct objfile
*);
251 struct find_targ_sec_arg
258 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
260 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
261 if (sect
->target_index
== args
->targ_index
)
262 *args
->resultp
= sect
;
265 /* Return the bfd_section that CS points to. */
266 static struct bfd_section
*
267 cs_to_bfd_section (struct coff_symbol
*cs
, struct objfile
*objfile
)
269 asection
*sect
= NULL
;
270 struct find_targ_sec_arg args
;
272 args
.targ_index
= cs
->c_secnum
;
273 args
.resultp
= §
;
274 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
278 /* Return the section number (SECT_OFF_*) that CS points to. */
280 cs_to_section (struct coff_symbol
*cs
, struct objfile
*objfile
)
282 asection
*sect
= cs_to_bfd_section (cs
, objfile
);
284 return SECT_OFF_TEXT (objfile
);
288 /* Return the address of the section of a COFF symbol. */
290 static CORE_ADDR
cs_section_address (struct coff_symbol
*, bfd
*);
293 cs_section_address (struct coff_symbol
*cs
, bfd
*abfd
)
295 asection
*sect
= NULL
;
296 struct find_targ_sec_arg args
;
299 args
.targ_index
= cs
->c_secnum
;
300 args
.resultp
= §
;
301 bfd_map_over_sections (abfd
, find_targ_sec
, &args
);
303 addr
= bfd_get_section_vma (objfile
->obfd
, sect
);
307 /* Look up a coff type-number index. Return the address of the slot
308 where the type for that index is stored.
309 The type-number is in INDEX.
311 This can be used for finding the type associated with that index
312 or for associating a new type with the index. */
314 static struct type
**
315 coff_lookup_type (int index
)
317 if (index
>= type_vector_length
)
319 int old_vector_length
= type_vector_length
;
321 type_vector_length
*= 2;
322 if (index
/* is still */ >= type_vector_length
)
323 type_vector_length
= index
* 2;
325 type_vector
= (struct type
**)
326 xrealloc ((char *) type_vector
,
327 type_vector_length
* sizeof (struct type
*));
328 memset (&type_vector
[old_vector_length
], 0,
329 (type_vector_length
- old_vector_length
) * sizeof (struct type
*));
331 return &type_vector
[index
];
334 /* Make sure there is a type allocated for type number index
335 and return the type object.
336 This can create an empty (zeroed) type object. */
339 coff_alloc_type (int index
)
341 struct type
**type_addr
= coff_lookup_type (index
);
342 struct type
*type
= *type_addr
;
344 /* If we are referring to a type not known at all yet,
345 allocate an empty type for it.
346 We will fill it in later if we find out how. */
349 type
= alloc_type (current_objfile
);
355 /* Start a new symtab for a new source file.
356 This is called when a COFF ".file" symbol is seen;
357 it indicates the start of data for one original source file. */
360 coff_start_symtab (char *name
)
363 /* We fill in the filename later. start_symtab puts
364 this pointer into last_source_file and we put it in
365 subfiles->name, which end_symtab frees; that's why
366 it must be malloc'd. */
368 /* We never know the directory name for COFF. */
370 /* The start address is irrelevant, since we set
371 last_source_start_addr in coff_end_symtab. */
373 record_debugformat ("COFF");
376 /* Save the vital information from when starting to read a file,
377 for use when closing off the current file.
378 NAME is the file name the symbols came from, START_ADDR is the first
379 text address for the file, and SIZE is the number of bytes of text. */
382 complete_symtab (char *name
, CORE_ADDR start_addr
, unsigned int size
)
384 if (last_source_file
!= NULL
)
385 xfree (last_source_file
);
386 last_source_file
= xstrdup (name
);
387 current_source_start_addr
= start_addr
;
388 current_source_end_addr
= start_addr
+ size
;
391 /* Finish the symbol definitions for one main source file,
392 close off all the lexical contexts for that file
393 (creating struct block's for them), then make the
394 struct symtab for that file and put it in the list of all such. */
397 coff_end_symtab (struct objfile
*objfile
)
399 struct symtab
*symtab
;
401 last_source_start_addr
= current_source_start_addr
;
403 symtab
= end_symtab (current_source_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
406 free_named_symtabs (symtab
->filename
);
408 /* Reinitialize for beginning of new file. */
409 last_source_file
= NULL
;
412 static struct minimal_symbol
*
413 record_minimal_symbol (struct coff_symbol
*cs
, CORE_ADDR address
,
414 enum minimal_symbol_type type
, int section
,
415 struct objfile
*objfile
)
417 struct bfd_section
*bfd_section
;
418 /* We don't want TDESC entry points in the minimal symbol table */
419 if (cs
->c_name
[0] == '@')
422 bfd_section
= cs_to_bfd_section (cs
, objfile
);
423 return prim_record_minimal_symbol_and_info (cs
->c_name
, address
, type
,
424 section
, bfd_section
, objfile
);
427 /* coff_symfile_init ()
428 is the coff-specific initialization routine for reading symbols.
429 It is passed a struct objfile which contains, among other things,
430 the BFD for the file whose symbols are being read, and a slot for
431 a pointer to "private data" which we fill with cookies and other
432 treats for coff_symfile_read ().
434 We will only be called if this is a COFF or COFF-like file.
435 BFD handles figuring out the format of the file, and code in symtab.c
436 uses BFD's determination to vector to us.
438 The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
441 coff_symfile_init (struct objfile
*objfile
)
443 /* Allocate struct to keep track of stab reading. */
444 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
445 xmalloc (sizeof (struct dbx_symfile_info
));
447 memset (objfile
->deprecated_sym_stab_info
, 0,
448 sizeof (struct dbx_symfile_info
));
450 /* Allocate struct to keep track of the symfile */
451 objfile
->deprecated_sym_private
= xmalloc (sizeof (struct coff_symfile_info
));
453 memset (objfile
->deprecated_sym_private
, 0, sizeof (struct coff_symfile_info
));
455 /* COFF objects may be reordered, so set OBJF_REORDERED. If we
456 find this causes a significant slowdown in gdb then we could
457 set it in the debug symbol readers only when necessary. */
458 objfile
->flags
|= OBJF_REORDERED
;
460 init_entry_point_info (objfile
);
463 /* This function is called for every section; it finds the outer limits
464 of the line table (minimum and maximum file offset) so that the
465 mainline code can read the whole thing for efficiency. */
468 find_linenos (bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
470 struct coff_symfile_info
*info
;
472 file_ptr offset
, maxoff
;
474 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
475 count
= asect
->lineno_count
;
480 size
= count
* local_linesz
;
482 info
= (struct coff_symfile_info
*) vpinfo
;
483 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
484 offset
= asect
->line_filepos
;
487 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
488 info
->min_lineno_offset
= offset
;
490 maxoff
= offset
+ size
;
491 if (maxoff
> info
->max_lineno_offset
)
492 info
->max_lineno_offset
= maxoff
;
496 /* The BFD for this file -- only good while we're actively reading
497 symbols into a psymtab or a symtab. */
499 static bfd
*symfile_bfd
;
501 /* Read a symbol file, after initialization by coff_symfile_init. */
504 coff_symfile_read (struct objfile
*objfile
, int symfile_flags
)
506 struct coff_symfile_info
*info
;
507 struct dbx_symfile_info
*dbxinfo
;
508 bfd
*abfd
= objfile
->obfd
;
509 coff_data_type
*cdata
= coff_data (abfd
);
510 char *name
= bfd_get_filename (abfd
);
512 unsigned int num_symbols
;
514 int stringtab_offset
;
515 struct cleanup
*back_to
, *cleanup_minimal_symbols
;
520 info
= (struct coff_symfile_info
*) objfile
->deprecated_sym_private
;
521 dbxinfo
= objfile
->deprecated_sym_stab_info
;
522 symfile_bfd
= abfd
; /* Kludge for swap routines */
524 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
525 num_symbols
= bfd_get_symcount (abfd
); /* How many syms */
526 symtab_offset
= cdata
->sym_filepos
; /* Symbol table file offset */
527 stringtab_offset
= symtab_offset
+ /* String table file offset */
528 num_symbols
* cdata
->local_symesz
;
530 /* Set a few file-statics that give us specific information about
531 the particular COFF file format we're reading. */
532 local_n_btmask
= cdata
->local_n_btmask
;
533 local_n_btshft
= cdata
->local_n_btshft
;
534 local_n_tmask
= cdata
->local_n_tmask
;
535 local_n_tshift
= cdata
->local_n_tshift
;
536 local_linesz
= cdata
->local_linesz
;
537 local_symesz
= cdata
->local_symesz
;
538 local_auxesz
= cdata
->local_auxesz
;
540 /* Allocate space for raw symbol and aux entries, based on their
541 space requirements as reported by BFD. */
542 temp_sym
= (char *) xmalloc
543 (cdata
->local_symesz
+ cdata
->local_auxesz
);
544 temp_aux
= temp_sym
+ cdata
->local_symesz
;
545 back_to
= make_cleanup (free_current_contents
, &temp_sym
);
547 /* We need to know whether this is a PE file, because in PE files,
548 unlike standard COFF files, symbol values are stored as offsets
549 from the section address, rather than as absolute addresses.
550 FIXME: We should use BFD to read the symbol table, and thus avoid
553 strncmp (bfd_get_target (objfile
->obfd
), "pe", 2) == 0
554 || strncmp (bfd_get_target (objfile
->obfd
), "epoc-pe", 7) == 0;
558 info
->min_lineno_offset
= 0;
559 info
->max_lineno_offset
= 0;
561 /* Only read line number information if we have symbols.
563 On Windows NT, some of the system's DLL's have sections with
564 PointerToLinenumbers fields that are non-zero, but point at
565 random places within the image file. (In the case I found,
566 KERNEL32.DLL's .text section has a line number info pointer that
567 points into the middle of the string `lib\\i386\kernel32.dll'.)
569 However, these DLL's also have no symbols. The line number
570 tables are meaningless without symbols. And in fact, GDB never
571 uses the line number information unless there are symbols. So we
572 can avoid spurious error messages (and maybe run a little
573 faster!) by not even reading the line number table unless we have
577 /* Read the line number table, all at once. */
578 bfd_map_over_sections (abfd
, find_linenos
, (void *) info
);
580 make_cleanup (free_linetab_cleanup
, 0 /*ignore*/);
581 val
= init_lineno (abfd
, info
->min_lineno_offset
,
582 info
->max_lineno_offset
- info
->min_lineno_offset
);
584 error (_("\"%s\": error reading line numbers."), name
);
587 /* Now read the string table, all at once. */
589 make_cleanup (free_stringtab_cleanup
, 0 /*ignore*/);
590 val
= init_stringtab (abfd
, stringtab_offset
);
592 error (_("\"%s\": can't get string table"), name
);
594 init_minimal_symbol_collection ();
595 cleanup_minimal_symbols
= make_cleanup_discard_minimal_symbols ();
597 /* Now that the executable file is positioned at symbol table,
598 process it and define symbols accordingly. */
600 coff_symtab_read ((long) symtab_offset
, num_symbols
, objfile
);
602 /* Install any minimal symbols that have been collected as the current
603 minimal symbols for this objfile. */
605 install_minimal_symbols (objfile
);
607 /* Free the installed minimal symbol data. */
608 do_cleanups (cleanup_minimal_symbols
);
610 bfd_map_over_sections (abfd
, coff_locate_sections
, (void *) info
);
614 if (!info
->stabstrsect
)
616 error (_("The debugging information in `%s' is corrupted.\n"
617 "The file has a `.stabs' section, but no `.stabstr' section."),
621 /* FIXME: dubious. Why can't we use something normal like
622 bfd_get_section_contents? */
623 bfd_seek (abfd
, abfd
->where
, 0);
625 stabstrsize
= bfd_section_size (abfd
, info
->stabstrsect
);
627 coffstab_build_psymtabs (objfile
,
628 info
->textaddr
, info
->textsize
,
630 info
->stabstrsect
->filepos
, stabstrsize
);
632 if (dwarf2_has_info (objfile
))
634 /* DWARF2 sections. */
635 dwarf2_build_psymtabs (objfile
);
638 dwarf2_build_frame_info (objfile
);
640 do_cleanups (back_to
);
644 coff_new_init (struct objfile
*ignore
)
648 /* Perform any local cleanups required when we are done with a particular
649 objfile. I.E, we are in the process of discarding all symbol information
650 for an objfile, freeing up all memory held for it, and unlinking the
651 objfile struct from the global list of known objfiles. */
654 coff_symfile_finish (struct objfile
*objfile
)
656 if (objfile
->deprecated_sym_private
!= NULL
)
658 xfree (objfile
->deprecated_sym_private
);
661 /* Let stabs reader clean up */
662 stabsread_clear_cache ();
664 dwarf2_free_objfile (objfile
);
668 /* Given pointers to a symbol table in coff style exec file,
669 analyze them and create struct symtab's describing the symbols.
670 NSYMS is the number of symbols in the symbol table.
671 We read them one at a time using read_one_sym (). */
674 coff_symtab_read (long symtab_offset
, unsigned int nsyms
,
675 struct objfile
*objfile
)
677 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
678 struct context_stack
*new;
679 struct coff_symbol coff_symbol
;
680 struct coff_symbol
*cs
= &coff_symbol
;
681 static struct internal_syment main_sym
;
682 static union internal_auxent main_aux
;
683 struct coff_symbol fcn_cs_saved
;
684 static struct internal_syment fcn_sym_saved
;
685 static union internal_auxent fcn_aux_saved
;
687 /* A .file is open. */
688 int in_source_file
= 0;
689 int next_file_symnum
= -1;
690 /* Name of the current file. */
691 char *filestring
= "";
693 int fcn_first_line
= 0;
694 CORE_ADDR fcn_first_line_addr
= 0;
695 int fcn_last_line
= 0;
696 int fcn_start_addr
= 0;
697 long fcn_line_ptr
= 0;
700 struct minimal_symbol
*msym
;
702 /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous....
703 it's hard to know I've really worked around it. The fix should be
704 harmless, anyway). The symptom of the bug is that the first
705 fread (in read_one_sym), will (in my example) actually get data
706 from file offset 268, when the fseek was to 264 (and ftell shows
707 264). This causes all hell to break loose. I was unable to
708 reproduce this on a short test program which operated on the same
709 file, performing (I think) the same sequence of operations.
711 It stopped happening when I put in this (former) rewind().
713 FIXME: Find out if this has been reported to Sun, whether it has
714 been fixed in a later release, etc. */
716 bfd_seek (objfile
->obfd
, 0, 0);
718 /* Position to read the symbol table. */
719 val
= bfd_seek (objfile
->obfd
, (long) symtab_offset
, 0);
721 perror_with_name (objfile
->name
);
723 current_objfile
= objfile
;
724 nlist_bfd_global
= objfile
->obfd
;
725 nlist_nsyms_global
= nsyms
;
726 last_source_file
= NULL
;
727 memset (opaque_type_chain
, 0, sizeof opaque_type_chain
);
729 if (type_vector
) /* Get rid of previous one */
731 type_vector_length
= 160;
732 type_vector
= (struct type
**)
733 xmalloc (type_vector_length
* sizeof (struct type
*));
734 memset (type_vector
, 0, type_vector_length
* sizeof (struct type
*));
736 coff_start_symtab ("");
739 while (symnum
< nsyms
)
741 QUIT
; /* Make this command interruptable. */
743 read_one_sym (cs
, &main_sym
, &main_aux
);
745 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
747 if (last_source_file
)
748 coff_end_symtab (objfile
);
750 coff_start_symtab ("_globals_");
751 /* coff_start_symtab will set the language of this symtab to
752 language_unknown, since such a ``file name'' is not
753 recognized. Override that with the minimal language to
754 allow printing values in this symtab. */
755 current_subfile
->language
= language_minimal
;
756 complete_symtab ("_globals_", 0, 0);
757 /* done with all files, everything from here on out is globals */
760 /* Special case for file with type declarations only, no text. */
761 if (!last_source_file
&& SDB_TYPE (cs
->c_type
)
762 && cs
->c_secnum
== N_DEBUG
)
763 complete_symtab (filestring
, 0, 0);
765 /* Typedefs should not be treated as symbol definitions. */
766 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
768 /* Record all functions -- external and static -- in minsyms. */
769 int section
= cs_to_section (cs
, objfile
);
770 tmpaddr
= cs
->c_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
771 record_minimal_symbol (cs
, tmpaddr
, mst_text
, section
, objfile
);
773 fcn_line_ptr
= main_aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
774 fcn_start_addr
= tmpaddr
;
776 fcn_sym_saved
= main_sym
;
777 fcn_aux_saved
= main_aux
;
781 switch (cs
->c_sclass
)
790 complaint (&symfile_complaints
, _("Bad n_sclass for symbol %s"),
795 /* c_value field contains symnum of next .file entry in table
796 or symnum of first global after last .file. */
797 next_file_symnum
= cs
->c_value
;
799 filestring
= coff_getfilename (&main_aux
);
803 /* Complete symbol table for last object file
804 containing debugging information. */
805 if (last_source_file
)
807 coff_end_symtab (objfile
);
808 coff_start_symtab (filestring
);
813 /* C_LABEL is used for labels and static functions. Including
814 it here allows gdb to see static functions when no debug
815 info is available. */
817 /* However, labels within a function can make weird backtraces,
818 so filter them out (from phdm@macqel.be). */
824 case C_THUMBSTATFUNC
:
825 if (cs
->c_name
[0] == '.')
827 if (strcmp (cs
->c_name
, ".text") == 0)
829 /* FIXME: don't wire in ".text" as section name
831 /* Check for in_source_file deals with case of
832 a file with debugging symbols
833 followed by a later file with no symbols. */
835 complete_symtab (filestring
,
836 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)),
837 main_aux
.x_scn
.x_scnlen
);
840 /* flush rest of '.' symbols */
843 else if (!SDB_TYPE (cs
->c_type
)
844 && cs
->c_name
[0] == 'L'
845 && (strncmp (cs
->c_name
, "LI%", 3) == 0
846 || strncmp (cs
->c_name
, "LF%", 3) == 0
847 || strncmp (cs
->c_name
, "LC%", 3) == 0
848 || strncmp (cs
->c_name
, "LP%", 3) == 0
849 || strncmp (cs
->c_name
, "LPB%", 4) == 0
850 || strncmp (cs
->c_name
, "LBB%", 4) == 0
851 || strncmp (cs
->c_name
, "LBE%", 4) == 0
852 || strncmp (cs
->c_name
, "LPBX%", 5) == 0))
853 /* At least on a 3b1, gcc generates swbeg and string labels
854 that look like this. Ignore them. */
856 /* fall in for static symbols that don't start with '.' */
861 /* Record it in the minimal symbols regardless of
862 SDB_TYPE. This parallels what we do for other debug
863 formats, and probably is needed to make
864 print_address_symbolic work right without the (now
865 gone) "set fast-symbolic-addr off" kludge. */
867 enum minimal_symbol_type ms_type
;
870 if (cs
->c_secnum
== N_UNDEF
)
872 /* This is a common symbol. See if the target
873 environment knows where it has been relocated to. */
875 if (target_lookup_symbol (cs
->c_name
, &reladdr
))
877 /* Error in lookup; ignore symbol. */
881 /* The address has already been relocated; make sure that
882 objfile_relocate doesn't relocate it again. */
884 ms_type
= cs
->c_sclass
== C_EXT
885 || cs
->c_sclass
== C_THUMBEXT
?
886 mst_bss
: mst_file_bss
;
888 else if (cs
->c_secnum
== N_ABS
)
890 /* Use the correct minimal symbol type (and don't
891 relocate) for absolute values. */
893 sec
= cs_to_section (cs
, objfile
);
894 tmpaddr
= cs
->c_value
;
898 asection
*bfd_section
= cs_to_bfd_section (cs
, objfile
);
899 sec
= cs_to_section (cs
, objfile
);
900 tmpaddr
= cs
->c_value
;
901 /* Statics in a PE file also get relocated */
902 if (cs
->c_sclass
== C_EXT
903 || cs
->c_sclass
== C_THUMBEXTFUNC
904 || cs
->c_sclass
== C_THUMBEXT
905 || (pe_file
&& (cs
->c_sclass
== C_STAT
)))
906 tmpaddr
+= ANOFFSET (objfile
->section_offsets
, sec
);
908 if (bfd_section
->flags
& SEC_CODE
)
911 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXTFUNC
912 || cs
->c_sclass
== C_THUMBEXT
?
913 mst_text
: mst_file_text
;
914 tmpaddr
= gdbarch_smash_text_address (gdbarch
, tmpaddr
);
916 else if (bfd_section
->flags
& SEC_ALLOC
917 && bfd_section
->flags
& SEC_LOAD
)
920 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
?
921 mst_data
: mst_file_data
;
923 else if (bfd_section
->flags
& SEC_ALLOC
)
926 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
?
927 mst_bss
: mst_file_bss
;
930 ms_type
= mst_unknown
;
933 msym
= record_minimal_symbol (cs
, tmpaddr
, ms_type
, sec
, objfile
);
935 gdbarch_coff_make_msymbol_special (gdbarch
, cs
->c_sclass
, msym
);
937 if (SDB_TYPE (cs
->c_type
))
940 sym
= process_coff_symbol
941 (cs
, &main_aux
, objfile
);
942 SYMBOL_VALUE (sym
) = tmpaddr
;
943 SYMBOL_SECTION (sym
) = sec
;
949 if (strcmp (cs
->c_name
, ".bf") == 0)
953 /* value contains address of first non-init type code */
954 /* main_aux.x_sym.x_misc.x_lnsz.x_lnno
955 contains line number of '{' } */
957 complaint (&symfile_complaints
,
958 _("`.bf' symbol %d has no aux entry"), cs
->c_symnum
);
959 fcn_first_line
= main_aux
.x_sym
.x_misc
.x_lnsz
.x_lnno
;
960 fcn_first_line_addr
= cs
->c_value
;
962 /* Might want to check that locals are 0 and
963 context_stack_depth is zero, and complain if not. */
966 new = push_context (depth
, fcn_start_addr
);
967 fcn_cs_saved
.c_name
= getsymname (&fcn_sym_saved
);
969 process_coff_symbol (&fcn_cs_saved
, &fcn_aux_saved
, objfile
);
971 else if (strcmp (cs
->c_name
, ".ef") == 0)
973 if (!within_function
)
974 error (_("Bad coff function information."));
975 /* the value of .ef is the address of epilogue code;
976 not useful for gdb. */
977 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
978 contains number of lines to '}' */
980 if (context_stack_depth
<= 0)
981 { /* We attempted to pop an empty context stack */
982 complaint (&symfile_complaints
,
983 _("`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d"),
989 new = pop_context ();
990 /* Stack must be empty now. */
991 if (context_stack_depth
> 0 || new == NULL
)
993 complaint (&symfile_complaints
,
994 _("Unmatched .ef symbol(s) ignored starting at symnum %d"),
1001 complaint (&symfile_complaints
,
1002 _("`.ef' symbol %d has no aux entry"), cs
->c_symnum
);
1003 fcn_last_line
= 0x7FFFFFFF;
1007 fcn_last_line
= main_aux
.x_sym
.x_misc
.x_lnsz
.x_lnno
;
1009 /* fcn_first_line is the line number of the opening '{'.
1010 Do not record it - because it would affect gdb's idea
1011 of the line number of the first statement of the function -
1012 except for one-line functions, for which it is also the line
1013 number of all the statements and of the closing '}', and
1014 for which we do not have any other statement-line-number. */
1015 if (fcn_last_line
== 1)
1016 record_line (current_subfile
, fcn_first_line
,
1017 gdbarch_addr_bits_remove (gdbarch
,
1018 fcn_first_line_addr
));
1020 enter_linenos (fcn_line_ptr
, fcn_first_line
, fcn_last_line
,
1023 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1025 fcn_cs_saved
.c_value
1026 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1027 + ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)),
1030 within_function
= 0;
1035 if (strcmp (cs
->c_name
, ".bb") == 0)
1037 tmpaddr
= cs
->c_value
;
1038 tmpaddr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1039 push_context (++depth
, tmpaddr
);
1041 else if (strcmp (cs
->c_name
, ".eb") == 0)
1043 if (context_stack_depth
<= 0)
1044 { /* We attempted to pop an empty context stack */
1045 complaint (&symfile_complaints
,
1046 _("`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d"),
1051 new = pop_context ();
1052 if (depth
-- != new->depth
)
1054 complaint (&symfile_complaints
,
1055 _("Mismatched .eb symbol ignored starting at symnum %d"),
1059 if (local_symbols
&& context_stack_depth
> 0)
1062 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1063 /* Make a block for the local symbols within. */
1064 finish_block (0, &local_symbols
, new->old_blocks
,
1065 new->start_addr
, tmpaddr
, objfile
);
1067 /* Now pop locals of block just finished. */
1068 local_symbols
= new->locals
;
1073 process_coff_symbol (cs
, &main_aux
, objfile
);
1078 if ((nsyms
== 0) && (pe_file
))
1080 /* We've got no debugging symbols, but it's a portable
1081 executable, so try to read the export table */
1082 read_pe_exported_syms (objfile
);
1085 if (last_source_file
)
1086 coff_end_symtab (objfile
);
1088 /* Patch up any opaque types (references to types that are not defined
1089 in the file where they are referenced, e.g. "struct foo *bar"). */
1090 ALL_OBJFILE_SYMTABS (objfile
, s
)
1091 patch_opaque_types (s
);
1093 current_objfile
= NULL
;
1096 /* Routines for reading headers and symbols from executable. */
1098 /* Read the next symbol, swap it, and return it in both internal_syment
1099 form, and coff_symbol form. Also return its first auxent, if any,
1100 in internal_auxent form, and skip any other auxents. */
1103 read_one_sym (struct coff_symbol
*cs
,
1104 struct internal_syment
*sym
,
1105 union internal_auxent
*aux
)
1108 bfd_size_type bytes
;
1110 cs
->c_symnum
= symnum
;
1111 bytes
= bfd_bread (temp_sym
, local_symesz
, nlist_bfd_global
);
1112 if (bytes
!= local_symesz
)
1113 error ("%s: error reading symbols", current_objfile
->name
);
1114 bfd_coff_swap_sym_in (symfile_bfd
, temp_sym
, (char *) sym
);
1115 cs
->c_naux
= sym
->n_numaux
& 0xff;
1116 if (cs
->c_naux
>= 1)
1118 bytes
= bfd_bread (temp_aux
, local_auxesz
, nlist_bfd_global
);
1119 if (bytes
!= local_auxesz
)
1120 error ("%s: error reading symbols", current_objfile
->name
);
1121 bfd_coff_swap_aux_in (symfile_bfd
, temp_aux
, sym
->n_type
, sym
->n_sclass
,
1122 0, cs
->c_naux
, (char *) aux
);
1123 /* If more than one aux entry, read past it (only the first aux
1125 for (i
= 1; i
< cs
->c_naux
; i
++)
1127 bytes
= bfd_bread (temp_aux
, local_auxesz
, nlist_bfd_global
);
1128 if (bytes
!= local_auxesz
)
1129 error ("%s: error reading symbols", current_objfile
->name
);
1132 cs
->c_name
= getsymname (sym
);
1133 cs
->c_value
= sym
->n_value
;
1134 cs
->c_sclass
= (sym
->n_sclass
& 0xff);
1135 cs
->c_secnum
= sym
->n_scnum
;
1136 cs
->c_type
= (unsigned) sym
->n_type
;
1137 if (!SDB_TYPE (cs
->c_type
))
1141 if (cs
->c_sclass
& 128)
1142 printf (_("thumb symbol %s, class 0x%x\n"), cs
->c_name
, cs
->c_sclass
);
1145 symnum
+= 1 + cs
->c_naux
;
1147 /* The PE file format stores symbol values as offsets within the
1148 section, rather than as absolute addresses. We correct that
1149 here, if the symbol has an appropriate storage class. FIXME: We
1150 should use BFD to read the symbols, rather than duplicating the
1154 switch (cs
->c_sclass
)
1158 case C_THUMBEXTFUNC
:
1163 case C_THUMBSTATFUNC
:
1169 if (cs
->c_secnum
!= 0)
1170 cs
->c_value
+= cs_section_address (cs
, symfile_bfd
);
1176 /* Support for string table handling */
1178 static char *stringtab
= NULL
;
1181 init_stringtab (bfd
*abfd
, long offset
)
1185 unsigned char lengthbuf
[4];
1189 /* If the file is stripped, the offset might be zero, indicating no
1190 string table. Just return with `stringtab' set to null. */
1194 if (bfd_seek (abfd
, offset
, 0) < 0)
1197 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1198 length
= bfd_h_get_32 (symfile_bfd
, lengthbuf
);
1200 /* If no string table is needed, then the file may end immediately
1201 after the symbols. Just return with `stringtab' set to null. */
1202 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1205 stringtab
= (char *) xmalloc (length
);
1206 /* This is in target format (probably not very useful, and not currently
1207 used), not host format. */
1208 memcpy (stringtab
, lengthbuf
, sizeof lengthbuf
);
1209 if (length
== sizeof length
) /* Empty table -- just the count */
1212 val
= bfd_bread (stringtab
+ sizeof lengthbuf
, length
- sizeof lengthbuf
,
1214 if (val
!= length
- sizeof lengthbuf
|| stringtab
[length
- 1] != '\0')
1221 free_stringtab (void)
1229 free_stringtab_cleanup (void *ignore
)
1235 getsymname (struct internal_syment
*symbol_entry
)
1237 static char buffer
[SYMNMLEN
+ 1];
1240 if (symbol_entry
->_n
._n_n
._n_zeroes
== 0)
1242 /* FIXME: Probably should be detecting corrupt symbol files by
1243 seeing whether offset points to within the stringtab. */
1244 result
= stringtab
+ symbol_entry
->_n
._n_n
._n_offset
;
1248 strncpy (buffer
, symbol_entry
->_n
._n_name
, SYMNMLEN
);
1249 buffer
[SYMNMLEN
] = '\0';
1255 /* Extract the file name from the aux entry of a C_FILE symbol. Return
1256 only the last component of the name. Result is in static storage and
1257 is only good for temporary use. */
1260 coff_getfilename (union internal_auxent
*aux_entry
)
1262 static char buffer
[BUFSIZ
];
1266 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1267 strcpy (buffer
, stringtab
+ aux_entry
->x_file
.x_n
.x_offset
);
1270 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1271 buffer
[FILNMLEN
] = '\0';
1275 /* FIXME: We should not be throwing away the information about what
1276 directory. It should go into dirname of the symtab, or some such
1278 if ((temp
= strrchr (result
, '/')) != NULL
)
1283 /* Support for line number handling. */
1285 static char *linetab
= NULL
;
1286 static long linetab_offset
;
1287 static unsigned long linetab_size
;
1289 /* Read in all the line numbers for fast lookups later. Leave them in
1290 external (unswapped) format in memory; we'll swap them as we enter
1291 them into GDB's data structures. */
1294 init_lineno (bfd
*abfd
, long offset
, int size
)
1298 linetab_offset
= offset
;
1299 linetab_size
= size
;
1306 if (bfd_seek (abfd
, offset
, 0) < 0)
1309 /* Allocate the desired table, plus a sentinel */
1310 linetab
= (char *) xmalloc (size
+ local_linesz
);
1312 val
= bfd_bread (linetab
, size
, abfd
);
1316 /* Terminate it with an all-zero sentinel record */
1317 memset (linetab
+ size
, 0, local_linesz
);
1331 free_linetab_cleanup (void *ignore
)
1336 #if !defined (L_LNNO32)
1337 #define L_LNNO32(lp) ((lp)->l_lnno)
1341 enter_linenos (long file_offset
, int first_line
,
1342 int last_line
, struct objfile
*objfile
)
1344 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1346 struct internal_lineno lptr
;
1350 if (file_offset
< linetab_offset
)
1352 complaint (&symfile_complaints
,
1353 _("Line number pointer %ld lower than start of line numbers"),
1355 if (file_offset
> linetab_size
) /* Too big to be an offset? */
1357 file_offset
+= linetab_offset
; /* Try reading at that linetab offset */
1360 rawptr
= &linetab
[file_offset
- linetab_offset
];
1362 /* skip first line entry for each function */
1363 rawptr
+= local_linesz
;
1364 /* line numbers start at one for the first line of the function */
1367 /* If the line number table is full (e.g. 64K lines in COFF debug
1368 info), the next function's L_LNNO32 might not be zero, so don't
1369 overstep the table's end in any case. */
1370 while (rawptr
<= &linetab
[0] + linetab_size
)
1372 bfd_coff_swap_lineno_in (symfile_bfd
, rawptr
, &lptr
);
1373 rawptr
+= local_linesz
;
1374 /* The next function, or the sentinel, will have L_LNNO32 zero;
1376 if (L_LNNO32 (&lptr
) && L_LNNO32 (&lptr
) <= last_line
)
1378 CORE_ADDR addr
= lptr
.l_addr
.l_paddr
;
1379 addr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1380 record_line (current_subfile
, first_line
+ L_LNNO32 (&lptr
),
1381 gdbarch_addr_bits_remove (gdbarch
, addr
));
1389 patch_type (struct type
*type
, struct type
*real_type
)
1391 struct type
*target
= TYPE_TARGET_TYPE (type
);
1392 struct type
*real_target
= TYPE_TARGET_TYPE (real_type
);
1393 int field_size
= TYPE_NFIELDS (real_target
) * sizeof (struct field
);
1395 TYPE_LENGTH (target
) = TYPE_LENGTH (real_target
);
1396 TYPE_NFIELDS (target
) = TYPE_NFIELDS (real_target
);
1397 TYPE_FIELDS (target
) = (struct field
*) TYPE_ALLOC (target
, field_size
);
1399 memcpy (TYPE_FIELDS (target
), TYPE_FIELDS (real_target
), field_size
);
1401 if (TYPE_NAME (real_target
))
1403 if (TYPE_NAME (target
))
1404 xfree (TYPE_NAME (target
));
1405 TYPE_NAME (target
) = concat (TYPE_NAME (real_target
), (char *)NULL
);
1409 /* Patch up all appropriate typedef symbols in the opaque_type_chains
1410 so that they can be used to print out opaque data structures properly. */
1413 patch_opaque_types (struct symtab
*s
)
1416 struct dict_iterator iter
;
1417 struct symbol
*real_sym
;
1419 /* Go through the per-file symbols only */
1420 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
1421 ALL_BLOCK_SYMBOLS (b
, iter
, real_sym
)
1423 /* Find completed typedefs to use to fix opaque ones.
1424 Remove syms from the chain when their types are stored,
1425 but search the whole chain, as there may be several syms
1426 from different files with the same name. */
1427 if (SYMBOL_CLASS (real_sym
) == LOC_TYPEDEF
1428 && SYMBOL_DOMAIN (real_sym
) == VAR_DOMAIN
1429 && TYPE_CODE (SYMBOL_TYPE (real_sym
)) == TYPE_CODE_PTR
1430 && TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym
))) != 0)
1432 char *name
= SYMBOL_LINKAGE_NAME (real_sym
);
1433 int hash
= hashname (name
);
1434 struct symbol
*sym
, *prev
;
1437 for (sym
= opaque_type_chain
[hash
]; sym
;)
1439 if (name
[0] == SYMBOL_LINKAGE_NAME (sym
)[0]
1440 && strcmp (name
+ 1, SYMBOL_LINKAGE_NAME (sym
) + 1) == 0)
1444 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
1448 opaque_type_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
1451 patch_type (SYMBOL_TYPE (sym
), SYMBOL_TYPE (real_sym
));
1455 sym
= SYMBOL_VALUE_CHAIN (prev
);
1459 sym
= opaque_type_chain
[hash
];
1465 sym
= SYMBOL_VALUE_CHAIN (sym
);
1473 coff_reg_to_regnum (struct symbol
*sym
, struct gdbarch
*gdbarch
)
1475 return gdbarch_sdb_reg_to_regnum (gdbarch
, SYMBOL_VALUE (sym
));
1478 static const struct symbol_register_ops coff_register_funcs
= {
1482 static struct symbol
*
1483 process_coff_symbol (struct coff_symbol
*cs
,
1484 union internal_auxent
*aux
,
1485 struct objfile
*objfile
)
1488 = (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
1489 sizeof (struct symbol
));
1492 memset (sym
, 0, sizeof (struct symbol
));
1494 name
= EXTERNAL_NAME (name
, objfile
->obfd
);
1495 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
1496 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), 1, objfile
);
1498 /* default assumptions */
1499 SYMBOL_VALUE (sym
) = cs
->c_value
;
1500 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1501 SYMBOL_SECTION (sym
) = cs_to_section (cs
, objfile
);
1503 if (ISFCN (cs
->c_type
))
1505 SYMBOL_VALUE (sym
) += ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1507 lookup_function_type (decode_function_type (cs
, cs
->c_type
, aux
, objfile
));
1509 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1510 if (cs
->c_sclass
== C_STAT
|| cs
->c_sclass
== C_THUMBSTAT
1511 || cs
->c_sclass
== C_THUMBSTATFUNC
)
1512 add_symbol_to_list (sym
, &file_symbols
);
1513 else if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
1514 || cs
->c_sclass
== C_THUMBEXTFUNC
)
1515 add_symbol_to_list (sym
, &global_symbols
);
1519 SYMBOL_TYPE (sym
) = decode_type (cs
, cs
->c_type
, aux
, objfile
);
1520 switch (cs
->c_sclass
)
1526 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1527 add_symbol_to_list (sym
, &local_symbols
);
1531 case C_THUMBEXTFUNC
:
1533 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1534 SYMBOL_VALUE_ADDRESS (sym
) = (CORE_ADDR
) cs
->c_value
;
1535 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1536 add_symbol_to_list (sym
, &global_symbols
);
1540 case C_THUMBSTATFUNC
:
1542 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1543 SYMBOL_VALUE_ADDRESS (sym
) = (CORE_ADDR
) cs
->c_value
;
1544 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1545 if (within_function
)
1547 /* Static symbol of local scope */
1548 add_symbol_to_list (sym
, &local_symbols
);
1552 /* Static symbol at top level of file */
1553 add_symbol_to_list (sym
, &file_symbols
);
1557 #ifdef C_GLBLREG /* AMD coff */
1561 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1562 SYMBOL_REGISTER_OPS (sym
) = &coff_register_funcs
;
1563 SYMBOL_VALUE (sym
) = cs
->c_value
;
1564 add_symbol_to_list (sym
, &local_symbols
);
1572 SYMBOL_CLASS (sym
) = LOC_ARG
;
1573 SYMBOL_IS_ARGUMENT (sym
) = 1;
1574 add_symbol_to_list (sym
, &local_symbols
);
1578 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1579 SYMBOL_REGISTER_OPS (sym
) = &coff_register_funcs
;
1580 SYMBOL_IS_ARGUMENT (sym
) = 1;
1581 SYMBOL_VALUE (sym
) = cs
->c_value
;
1582 add_symbol_to_list (sym
, &local_symbols
);
1586 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1587 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1589 /* If type has no name, give it one */
1590 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1592 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1593 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1595 /* If we are giving a name to a type such as "pointer to
1596 foo" or "function returning foo", we better not set
1597 the TYPE_NAME. If the program contains "typedef char
1598 *caddr_t;", we don't want all variables of type char
1599 * to print as caddr_t. This is not just a
1600 consequence of GDB's type management; CC and GCC (at
1601 least through version 2.4) both output variables of
1602 either type char * or caddr_t with the type
1603 refering to the C_TPDEF symbol for caddr_t. If a future
1604 compiler cleans this up it GDB is not ready for it
1605 yet, but if it becomes ready we somehow need to
1606 disable this check (without breaking the PCC/GCC2.4
1611 Fortunately, this check seems not to be necessary
1612 for anything except pointers or functions. */
1616 TYPE_NAME (SYMBOL_TYPE (sym
)) =
1617 concat (SYMBOL_LINKAGE_NAME (sym
), (char *)NULL
);
1620 /* Keep track of any type which points to empty structured type,
1621 so it can be filled from a definition from another file. A
1622 simple forward reference (TYPE_CODE_UNDEF) is not an
1623 empty structured type, though; the forward references
1624 work themselves out via the magic of coff_lookup_type. */
1625 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1626 && TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym
))) == 0
1627 && TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym
)))
1630 int i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
1632 SYMBOL_VALUE_CHAIN (sym
) = opaque_type_chain
[i
];
1633 opaque_type_chain
[i
] = sym
;
1635 add_symbol_to_list (sym
, &file_symbols
);
1641 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1642 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1644 /* Some compilers try to be helpful by inventing "fake"
1645 names for anonymous enums, structures, and unions, like
1646 "~0fake" or ".0fake". Thanks, but no thanks... */
1647 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1648 if (SYMBOL_LINKAGE_NAME (sym
) != NULL
1649 && *SYMBOL_LINKAGE_NAME (sym
) != '~'
1650 && *SYMBOL_LINKAGE_NAME (sym
) != '.')
1651 TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) =
1652 concat (SYMBOL_LINKAGE_NAME (sym
), (char *)NULL
);
1654 add_symbol_to_list (sym
, &file_symbols
);
1664 /* Decode a coff type specifier; return the type that is meant. */
1666 static struct type
*
1667 decode_type (struct coff_symbol
*cs
, unsigned int c_type
,
1668 union internal_auxent
*aux
, struct objfile
*objfile
)
1670 struct type
*type
= 0;
1671 unsigned int new_c_type
;
1673 if (c_type
& ~N_BTMASK
)
1675 new_c_type
= DECREF (c_type
);
1678 type
= decode_type (cs
, new_c_type
, aux
, objfile
);
1679 type
= lookup_pointer_type (type
);
1681 else if (ISFCN (c_type
))
1683 type
= decode_type (cs
, new_c_type
, aux
, objfile
);
1684 type
= lookup_function_type (type
);
1686 else if (ISARY (c_type
))
1689 unsigned short *dim
;
1690 struct type
*base_type
, *index_type
, *range_type
;
1692 /* Define an array type. */
1693 /* auxent refers to array, not base type */
1694 if (aux
->x_sym
.x_tagndx
.l
== 0)
1697 /* shift the indices down */
1698 dim
= &aux
->x_sym
.x_fcnary
.x_ary
.x_dimen
[0];
1701 for (i
= 0; *dim
&& i
< DIMNUM
- 1; i
++, dim
++)
1705 base_type
= decode_type (cs
, new_c_type
, aux
, objfile
);
1706 index_type
= objfile_type (objfile
)->builtin_int
;
1708 create_range_type ((struct type
*) NULL
, index_type
, 0, n
- 1);
1710 create_array_type ((struct type
*) NULL
, base_type
, range_type
);
1715 /* Reference to existing type. This only occurs with the
1716 struct, union, and enum types. EPI a29k coff
1717 fakes us out by producing aux entries with a nonzero
1718 x_tagndx for definitions of structs, unions, and enums, so we
1719 have to check the c_sclass field. SCO 3.2v4 cc gets confused
1720 with pointers to pointers to defined structs, and generates
1721 negative x_tagndx fields. */
1722 if (cs
->c_naux
> 0 && aux
->x_sym
.x_tagndx
.l
!= 0)
1724 if (cs
->c_sclass
!= C_STRTAG
1725 && cs
->c_sclass
!= C_UNTAG
1726 && cs
->c_sclass
!= C_ENTAG
1727 && aux
->x_sym
.x_tagndx
.l
>= 0)
1729 type
= coff_alloc_type (aux
->x_sym
.x_tagndx
.l
);
1734 complaint (&symfile_complaints
,
1735 _("Symbol table entry for %s has bad tagndx value"),
1737 /* And fall through to decode_base_type... */
1741 return decode_base_type (cs
, BTYPE (c_type
), aux
, objfile
);
1744 /* Decode a coff type specifier for function definition;
1745 return the type that the function returns. */
1747 static struct type
*
1748 decode_function_type (struct coff_symbol
*cs
, unsigned int c_type
,
1749 union internal_auxent
*aux
, struct objfile
*objfile
)
1751 if (aux
->x_sym
.x_tagndx
.l
== 0)
1752 cs
->c_naux
= 0; /* auxent refers to function, not base type */
1754 return decode_type (cs
, DECREF (c_type
), aux
, objfile
);
1759 static struct type
*
1760 decode_base_type (struct coff_symbol
*cs
, unsigned int c_type
,
1761 union internal_auxent
*aux
, struct objfile
*objfile
)
1763 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1769 /* shows up with "void (*foo)();" structure members */
1770 return objfile_type (objfile
)->builtin_void
;
1774 /* Intel 960 COFF has this symbol and meaning. */
1775 return objfile_type (objfile
)->builtin_void
;
1779 return objfile_type (objfile
)->builtin_char
;
1782 return objfile_type (objfile
)->builtin_short
;
1785 return objfile_type (objfile
)->builtin_int
;
1788 if (cs
->c_sclass
== C_FIELD
1789 && aux
->x_sym
.x_misc
.x_lnsz
.x_size
1790 > gdbarch_long_bit (gdbarch
))
1791 return objfile_type (objfile
)->builtin_long_long
;
1793 return objfile_type (objfile
)->builtin_long
;
1796 return objfile_type (objfile
)->builtin_float
;
1799 return objfile_type (objfile
)->builtin_double
;
1802 return objfile_type (objfile
)->builtin_long_double
;
1805 if (cs
->c_naux
!= 1)
1807 /* anonymous structure type */
1808 type
= coff_alloc_type (cs
->c_symnum
);
1809 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
1810 TYPE_NAME (type
) = NULL
;
1811 /* This used to set the tag to "<opaque>". But I think setting it
1812 to NULL is right, and the printing code can print it as
1814 TYPE_TAG_NAME (type
) = NULL
;
1815 INIT_CPLUS_SPECIFIC (type
);
1816 TYPE_LENGTH (type
) = 0;
1817 TYPE_FIELDS (type
) = 0;
1818 TYPE_NFIELDS (type
) = 0;
1822 type
= coff_read_struct_type (cs
->c_symnum
,
1823 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1824 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
,
1830 if (cs
->c_naux
!= 1)
1832 /* anonymous union type */
1833 type
= coff_alloc_type (cs
->c_symnum
);
1834 TYPE_NAME (type
) = NULL
;
1835 /* This used to set the tag to "<opaque>". But I think setting it
1836 to NULL is right, and the printing code can print it as
1838 TYPE_TAG_NAME (type
) = NULL
;
1839 INIT_CPLUS_SPECIFIC (type
);
1840 TYPE_LENGTH (type
) = 0;
1841 TYPE_FIELDS (type
) = 0;
1842 TYPE_NFIELDS (type
) = 0;
1846 type
= coff_read_struct_type (cs
->c_symnum
,
1847 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1848 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
,
1851 TYPE_CODE (type
) = TYPE_CODE_UNION
;
1855 if (cs
->c_naux
!= 1)
1857 /* anonymous enum type */
1858 type
= coff_alloc_type (cs
->c_symnum
);
1859 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
1860 TYPE_NAME (type
) = NULL
;
1861 /* This used to set the tag to "<opaque>". But I think setting it
1862 to NULL is right, and the printing code can print it as
1864 TYPE_TAG_NAME (type
) = NULL
;
1865 TYPE_LENGTH (type
) = 0;
1866 TYPE_FIELDS (type
) = 0;
1867 TYPE_NFIELDS (type
) = 0;
1871 type
= coff_read_enum_type (cs
->c_symnum
,
1872 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1873 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
,
1879 /* shouldn't show up here */
1883 return objfile_type (objfile
)->builtin_unsigned_char
;
1886 return objfile_type (objfile
)->builtin_unsigned_short
;
1889 return objfile_type (objfile
)->builtin_unsigned_int
;
1892 if (cs
->c_sclass
== C_FIELD
1893 && aux
->x_sym
.x_misc
.x_lnsz
.x_size
1894 > gdbarch_long_bit (gdbarch
))
1895 return objfile_type (objfile
)->builtin_unsigned_long_long
;
1897 return objfile_type (objfile
)->builtin_unsigned_long
;
1899 complaint (&symfile_complaints
, _("Unexpected type for symbol %s"), cs
->c_name
);
1900 return objfile_type (objfile
)->builtin_void
;
1903 /* This page contains subroutines of read_type. */
1905 /* Read the description of a structure (or union type) and return an
1906 object describing the type. */
1908 static struct type
*
1909 coff_read_struct_type (int index
, int length
, int lastsym
,
1910 struct objfile
*objfile
)
1914 struct nextfield
*next
;
1919 struct nextfield
*list
= 0;
1920 struct nextfield
*new;
1924 struct coff_symbol member_sym
;
1925 struct coff_symbol
*ms
= &member_sym
;
1926 struct internal_syment sub_sym
;
1927 union internal_auxent sub_aux
;
1930 type
= coff_alloc_type (index
);
1931 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
1932 INIT_CPLUS_SPECIFIC (type
);
1933 TYPE_LENGTH (type
) = length
;
1935 while (!done
&& symnum
< lastsym
&& symnum
< nlist_nsyms_global
)
1937 read_one_sym (ms
, &sub_sym
, &sub_aux
);
1939 name
= EXTERNAL_NAME (name
, objfile
->obfd
);
1941 switch (ms
->c_sclass
)
1946 /* Get space to record the next field's data. */
1947 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
1951 /* Save the data. */
1953 obsavestring (name
, strlen (name
), &objfile
->objfile_obstack
);
1954 FIELD_TYPE (list
->field
) = decode_type (ms
, ms
->c_type
, &sub_aux
,
1956 SET_FIELD_BITPOS (list
->field
, 8 * ms
->c_value
);
1957 FIELD_BITSIZE (list
->field
) = 0;
1963 /* Get space to record the next field's data. */
1964 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
1968 /* Save the data. */
1970 obsavestring (name
, strlen (name
), &objfile
->objfile_obstack
);
1971 FIELD_TYPE (list
->field
) = decode_type (ms
, ms
->c_type
, &sub_aux
,
1973 SET_FIELD_BITPOS (list
->field
, ms
->c_value
);
1974 FIELD_BITSIZE (list
->field
) = sub_aux
.x_sym
.x_misc
.x_lnsz
.x_size
;
1983 /* Now create the vector of fields, and record how big it is. */
1985 TYPE_NFIELDS (type
) = nfields
;
1986 TYPE_FIELDS (type
) = (struct field
*)
1987 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
1989 /* Copy the saved-up fields into the field vector. */
1991 for (n
= nfields
; list
; list
= list
->next
)
1992 TYPE_FIELD (type
, --n
) = list
->field
;
1997 /* Read a definition of an enumeration type,
1998 and create and return a suitable type object.
1999 Also defines the symbols that represent the values of the type. */
2001 static struct type
*
2002 coff_read_enum_type (int index
, int length
, int lastsym
,
2003 struct objfile
*objfile
)
2005 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2010 struct pending
**symlist
;
2011 struct coff_symbol member_sym
;
2012 struct coff_symbol
*ms
= &member_sym
;
2013 struct internal_syment sub_sym
;
2014 union internal_auxent sub_aux
;
2015 struct pending
*osyms
, *syms
;
2019 int unsigned_enum
= 1;
2021 type
= coff_alloc_type (index
);
2022 if (within_function
)
2023 symlist
= &local_symbols
;
2025 symlist
= &file_symbols
;
2027 o_nsyms
= osyms
? osyms
->nsyms
: 0;
2029 while (!done
&& symnum
< lastsym
&& symnum
< nlist_nsyms_global
)
2031 read_one_sym (ms
, &sub_sym
, &sub_aux
);
2033 name
= EXTERNAL_NAME (name
, objfile
->obfd
);
2035 switch (ms
->c_sclass
)
2038 sym
= (struct symbol
*) obstack_alloc
2039 (&objfile
->objfile_obstack
, sizeof (struct symbol
));
2040 memset (sym
, 0, sizeof (struct symbol
));
2042 SYMBOL_SET_LINKAGE_NAME (sym
,
2043 obsavestring (name
, strlen (name
),
2044 &objfile
->objfile_obstack
));
2045 SYMBOL_CLASS (sym
) = LOC_CONST
;
2046 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
2047 SYMBOL_VALUE (sym
) = ms
->c_value
;
2048 add_symbol_to_list (sym
, symlist
);
2053 /* Sometimes the linker (on 386/ix 2.0.2 at least) screws
2054 up the count of how many symbols to read. So stop
2061 /* Now fill in the fields of the type-structure. */
2064 TYPE_LENGTH (type
) = length
;
2065 else /* Assume ints. */
2066 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
;
2067 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
2068 TYPE_NFIELDS (type
) = nsyms
;
2069 TYPE_FIELDS (type
) = (struct field
*)
2070 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
2072 /* Find the symbols for the values and put them into the type.
2073 The symbols can be found in the symlist that we put them on
2074 to cause them to be defined. osyms contains the old value
2075 of that symlist; everything up to there was defined by us. */
2076 /* Note that we preserve the order of the enum constants, so
2077 that in something like "enum {FOO, LAST_THING=FOO}" we print
2078 FOO, not LAST_THING. */
2080 for (syms
= *symlist
, n
= 0; syms
; syms
= syms
->next
)
2086 for (; j
< syms
->nsyms
; j
++, n
++)
2088 struct symbol
*xsym
= syms
->symbol
[j
];
2089 SYMBOL_TYPE (xsym
) = type
;
2090 TYPE_FIELD_NAME (type
, n
) = SYMBOL_LINKAGE_NAME (xsym
);
2091 SET_FIELD_BITPOS (TYPE_FIELD (type
, n
), SYMBOL_VALUE (xsym
));
2092 if (SYMBOL_VALUE (xsym
) < 0)
2094 TYPE_FIELD_BITSIZE (type
, n
) = 0;
2101 TYPE_UNSIGNED (type
) = 1;
2106 /* Register our ability to parse symbols for coff BFD files. */
2108 static struct sym_fns coff_sym_fns
=
2110 bfd_target_coff_flavour
,
2111 coff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2112 coff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2113 coff_symfile_read
, /* sym_read: read a symbol file into symtab */
2114 coff_symfile_finish
, /* sym_finish: finished with file, cleanup */
2115 default_symfile_offsets
, /* sym_offsets: xlate external to internal form */
2116 default_symfile_segments
, /* sym_segments: Get segment information from
2118 NULL
, /* sym_read_linetable */
2119 NULL
/* next: pointer to next struct sym_fns */
2123 _initialize_coffread (void)
2125 add_symtab_fns (&coff_sym_fns
);