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 mainline
)
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 /* If we are reinitializing, or if we have not loaded syms yet,
611 empty the psymtab. "mainline" is cleared so the *_read_psymtab
612 functions do not all re-initialize it. */
615 init_psymbol_list (objfile
, 0);
619 bfd_map_over_sections (abfd
, coff_locate_sections
, (void *) info
);
623 if (!info
->stabstrsect
)
625 error (_("The debugging information in `%s' is corrupted.\n"
626 "The file has a `.stabs' section, but no `.stabstr' section."),
630 /* FIXME: dubious. Why can't we use something normal like
631 bfd_get_section_contents? */
632 bfd_seek (abfd
, abfd
->where
, 0);
634 stabstrsize
= bfd_section_size (abfd
, info
->stabstrsect
);
636 coffstab_build_psymtabs (objfile
,
637 info
->textaddr
, info
->textsize
,
639 info
->stabstrsect
->filepos
, stabstrsize
);
641 if (dwarf2_has_info (objfile
))
643 /* DWARF2 sections. */
644 dwarf2_build_psymtabs (objfile
);
647 dwarf2_build_frame_info (objfile
);
649 do_cleanups (back_to
);
653 coff_new_init (struct objfile
*ignore
)
657 /* Perform any local cleanups required when we are done with a particular
658 objfile. I.E, we are in the process of discarding all symbol information
659 for an objfile, freeing up all memory held for it, and unlinking the
660 objfile struct from the global list of known objfiles. */
663 coff_symfile_finish (struct objfile
*objfile
)
665 if (objfile
->deprecated_sym_private
!= NULL
)
667 xfree (objfile
->deprecated_sym_private
);
670 /* Let stabs reader clean up */
671 stabsread_clear_cache ();
673 dwarf2_free_objfile (objfile
);
677 /* Given pointers to a symbol table in coff style exec file,
678 analyze them and create struct symtab's describing the symbols.
679 NSYMS is the number of symbols in the symbol table.
680 We read them one at a time using read_one_sym (). */
683 coff_symtab_read (long symtab_offset
, unsigned int nsyms
,
684 struct objfile
*objfile
)
686 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
687 struct context_stack
*new;
688 struct coff_symbol coff_symbol
;
689 struct coff_symbol
*cs
= &coff_symbol
;
690 static struct internal_syment main_sym
;
691 static union internal_auxent main_aux
;
692 struct coff_symbol fcn_cs_saved
;
693 static struct internal_syment fcn_sym_saved
;
694 static union internal_auxent fcn_aux_saved
;
696 /* A .file is open. */
697 int in_source_file
= 0;
698 int next_file_symnum
= -1;
699 /* Name of the current file. */
700 char *filestring
= "";
702 int fcn_first_line
= 0;
703 CORE_ADDR fcn_first_line_addr
= 0;
704 int fcn_last_line
= 0;
705 int fcn_start_addr
= 0;
706 long fcn_line_ptr
= 0;
709 struct minimal_symbol
*msym
;
711 /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous....
712 it's hard to know I've really worked around it. The fix should be
713 harmless, anyway). The symptom of the bug is that the first
714 fread (in read_one_sym), will (in my example) actually get data
715 from file offset 268, when the fseek was to 264 (and ftell shows
716 264). This causes all hell to break loose. I was unable to
717 reproduce this on a short test program which operated on the same
718 file, performing (I think) the same sequence of operations.
720 It stopped happening when I put in this (former) rewind().
722 FIXME: Find out if this has been reported to Sun, whether it has
723 been fixed in a later release, etc. */
725 bfd_seek (objfile
->obfd
, 0, 0);
727 /* Position to read the symbol table. */
728 val
= bfd_seek (objfile
->obfd
, (long) symtab_offset
, 0);
730 perror_with_name (objfile
->name
);
732 current_objfile
= objfile
;
733 nlist_bfd_global
= objfile
->obfd
;
734 nlist_nsyms_global
= nsyms
;
735 last_source_file
= NULL
;
736 memset (opaque_type_chain
, 0, sizeof opaque_type_chain
);
738 if (type_vector
) /* Get rid of previous one */
740 type_vector_length
= 160;
741 type_vector
= (struct type
**)
742 xmalloc (type_vector_length
* sizeof (struct type
*));
743 memset (type_vector
, 0, type_vector_length
* sizeof (struct type
*));
745 coff_start_symtab ("");
748 while (symnum
< nsyms
)
750 QUIT
; /* Make this command interruptable. */
752 read_one_sym (cs
, &main_sym
, &main_aux
);
754 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
756 if (last_source_file
)
757 coff_end_symtab (objfile
);
759 coff_start_symtab ("_globals_");
760 /* coff_start_symtab will set the language of this symtab to
761 language_unknown, since such a ``file name'' is not
762 recognized. Override that with the minimal language to
763 allow printing values in this symtab. */
764 current_subfile
->language
= language_minimal
;
765 complete_symtab ("_globals_", 0, 0);
766 /* done with all files, everything from here on out is globals */
769 /* Special case for file with type declarations only, no text. */
770 if (!last_source_file
&& SDB_TYPE (cs
->c_type
)
771 && cs
->c_secnum
== N_DEBUG
)
772 complete_symtab (filestring
, 0, 0);
774 /* Typedefs should not be treated as symbol definitions. */
775 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
777 /* Record all functions -- external and static -- in minsyms. */
778 int section
= cs_to_section (cs
, objfile
);
779 tmpaddr
= cs
->c_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
780 record_minimal_symbol (cs
, tmpaddr
, mst_text
, section
, objfile
);
782 fcn_line_ptr
= main_aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
783 fcn_start_addr
= tmpaddr
;
785 fcn_sym_saved
= main_sym
;
786 fcn_aux_saved
= main_aux
;
790 switch (cs
->c_sclass
)
799 complaint (&symfile_complaints
, _("Bad n_sclass for symbol %s"),
804 /* c_value field contains symnum of next .file entry in table
805 or symnum of first global after last .file. */
806 next_file_symnum
= cs
->c_value
;
808 filestring
= coff_getfilename (&main_aux
);
812 /* Complete symbol table for last object file
813 containing debugging information. */
814 if (last_source_file
)
816 coff_end_symtab (objfile
);
817 coff_start_symtab (filestring
);
822 /* C_LABEL is used for labels and static functions. Including
823 it here allows gdb to see static functions when no debug
824 info is available. */
826 /* However, labels within a function can make weird backtraces,
827 so filter them out (from phdm@macqel.be). */
833 case C_THUMBSTATFUNC
:
834 if (cs
->c_name
[0] == '.')
836 if (strcmp (cs
->c_name
, ".text") == 0)
838 /* FIXME: don't wire in ".text" as section name
840 /* Check for in_source_file deals with case of
841 a file with debugging symbols
842 followed by a later file with no symbols. */
844 complete_symtab (filestring
,
845 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)),
846 main_aux
.x_scn
.x_scnlen
);
849 /* flush rest of '.' symbols */
852 else if (!SDB_TYPE (cs
->c_type
)
853 && cs
->c_name
[0] == 'L'
854 && (strncmp (cs
->c_name
, "LI%", 3) == 0
855 || strncmp (cs
->c_name
, "LF%", 3) == 0
856 || strncmp (cs
->c_name
, "LC%", 3) == 0
857 || strncmp (cs
->c_name
, "LP%", 3) == 0
858 || strncmp (cs
->c_name
, "LPB%", 4) == 0
859 || strncmp (cs
->c_name
, "LBB%", 4) == 0
860 || strncmp (cs
->c_name
, "LBE%", 4) == 0
861 || strncmp (cs
->c_name
, "LPBX%", 5) == 0))
862 /* At least on a 3b1, gcc generates swbeg and string labels
863 that look like this. Ignore them. */
865 /* fall in for static symbols that don't start with '.' */
870 /* Record it in the minimal symbols regardless of
871 SDB_TYPE. This parallels what we do for other debug
872 formats, and probably is needed to make
873 print_address_symbolic work right without the (now
874 gone) "set fast-symbolic-addr off" kludge. */
876 enum minimal_symbol_type ms_type
;
879 if (cs
->c_secnum
== N_UNDEF
)
881 /* This is a common symbol. See if the target
882 environment knows where it has been relocated to. */
884 if (target_lookup_symbol (cs
->c_name
, &reladdr
))
886 /* Error in lookup; ignore symbol. */
890 /* The address has already been relocated; make sure that
891 objfile_relocate doesn't relocate it again. */
893 ms_type
= cs
->c_sclass
== C_EXT
894 || cs
->c_sclass
== C_THUMBEXT
?
895 mst_bss
: mst_file_bss
;
897 else if (cs
->c_secnum
== N_ABS
)
899 /* Use the correct minimal symbol type (and don't
900 relocate) for absolute values. */
902 sec
= cs_to_section (cs
, objfile
);
903 tmpaddr
= cs
->c_value
;
907 asection
*bfd_section
= cs_to_bfd_section (cs
, objfile
);
908 sec
= cs_to_section (cs
, objfile
);
909 tmpaddr
= cs
->c_value
;
910 /* Statics in a PE file also get relocated */
911 if (cs
->c_sclass
== C_EXT
912 || cs
->c_sclass
== C_THUMBEXTFUNC
913 || cs
->c_sclass
== C_THUMBEXT
914 || (pe_file
&& (cs
->c_sclass
== C_STAT
)))
915 tmpaddr
+= ANOFFSET (objfile
->section_offsets
, sec
);
917 if (bfd_section
->flags
& SEC_CODE
)
920 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXTFUNC
921 || cs
->c_sclass
== C_THUMBEXT
?
922 mst_text
: mst_file_text
;
923 tmpaddr
= gdbarch_smash_text_address (gdbarch
, tmpaddr
);
925 else if (bfd_section
->flags
& SEC_ALLOC
926 && bfd_section
->flags
& SEC_LOAD
)
929 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
?
930 mst_data
: mst_file_data
;
932 else if (bfd_section
->flags
& SEC_ALLOC
)
935 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
?
936 mst_bss
: mst_file_bss
;
939 ms_type
= mst_unknown
;
942 msym
= record_minimal_symbol (cs
, tmpaddr
, ms_type
, sec
, objfile
);
944 gdbarch_coff_make_msymbol_special (gdbarch
, cs
->c_sclass
, msym
);
946 if (SDB_TYPE (cs
->c_type
))
949 sym
= process_coff_symbol
950 (cs
, &main_aux
, objfile
);
951 SYMBOL_VALUE (sym
) = tmpaddr
;
952 SYMBOL_SECTION (sym
) = sec
;
958 if (strcmp (cs
->c_name
, ".bf") == 0)
962 /* value contains address of first non-init type code */
963 /* main_aux.x_sym.x_misc.x_lnsz.x_lnno
964 contains line number of '{' } */
966 complaint (&symfile_complaints
,
967 _("`.bf' symbol %d has no aux entry"), cs
->c_symnum
);
968 fcn_first_line
= main_aux
.x_sym
.x_misc
.x_lnsz
.x_lnno
;
969 fcn_first_line_addr
= cs
->c_value
;
971 /* Might want to check that locals are 0 and
972 context_stack_depth is zero, and complain if not. */
975 new = push_context (depth
, fcn_start_addr
);
976 fcn_cs_saved
.c_name
= getsymname (&fcn_sym_saved
);
978 process_coff_symbol (&fcn_cs_saved
, &fcn_aux_saved
, objfile
);
980 else if (strcmp (cs
->c_name
, ".ef") == 0)
982 if (!within_function
)
983 error (_("Bad coff function information."));
984 /* the value of .ef is the address of epilogue code;
985 not useful for gdb. */
986 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
987 contains number of lines to '}' */
989 if (context_stack_depth
<= 0)
990 { /* We attempted to pop an empty context stack */
991 complaint (&symfile_complaints
,
992 _("`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d"),
998 new = pop_context ();
999 /* Stack must be empty now. */
1000 if (context_stack_depth
> 0 || new == NULL
)
1002 complaint (&symfile_complaints
,
1003 _("Unmatched .ef symbol(s) ignored starting at symnum %d"),
1005 within_function
= 0;
1008 if (cs
->c_naux
!= 1)
1010 complaint (&symfile_complaints
,
1011 _("`.ef' symbol %d has no aux entry"), cs
->c_symnum
);
1012 fcn_last_line
= 0x7FFFFFFF;
1016 fcn_last_line
= main_aux
.x_sym
.x_misc
.x_lnsz
.x_lnno
;
1018 /* fcn_first_line is the line number of the opening '{'.
1019 Do not record it - because it would affect gdb's idea
1020 of the line number of the first statement of the function -
1021 except for one-line functions, for which it is also the line
1022 number of all the statements and of the closing '}', and
1023 for which we do not have any other statement-line-number. */
1024 if (fcn_last_line
== 1)
1025 record_line (current_subfile
, fcn_first_line
,
1026 gdbarch_addr_bits_remove (gdbarch
,
1027 fcn_first_line_addr
));
1029 enter_linenos (fcn_line_ptr
, fcn_first_line
, fcn_last_line
,
1032 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1034 fcn_cs_saved
.c_value
1035 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1036 + ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)),
1039 within_function
= 0;
1044 if (strcmp (cs
->c_name
, ".bb") == 0)
1046 tmpaddr
= cs
->c_value
;
1047 tmpaddr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1048 push_context (++depth
, tmpaddr
);
1050 else if (strcmp (cs
->c_name
, ".eb") == 0)
1052 if (context_stack_depth
<= 0)
1053 { /* We attempted to pop an empty context stack */
1054 complaint (&symfile_complaints
,
1055 _("`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d"),
1060 new = pop_context ();
1061 if (depth
-- != new->depth
)
1063 complaint (&symfile_complaints
,
1064 _("Mismatched .eb symbol ignored starting at symnum %d"),
1068 if (local_symbols
&& context_stack_depth
> 0)
1071 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1072 /* Make a block for the local symbols within. */
1073 finish_block (0, &local_symbols
, new->old_blocks
,
1074 new->start_addr
, tmpaddr
, objfile
);
1076 /* Now pop locals of block just finished. */
1077 local_symbols
= new->locals
;
1082 process_coff_symbol (cs
, &main_aux
, objfile
);
1087 if ((nsyms
== 0) && (pe_file
))
1089 /* We've got no debugging symbols, but it's a portable
1090 executable, so try to read the export table */
1091 read_pe_exported_syms (objfile
);
1094 if (last_source_file
)
1095 coff_end_symtab (objfile
);
1097 /* Patch up any opaque types (references to types that are not defined
1098 in the file where they are referenced, e.g. "struct foo *bar"). */
1099 ALL_OBJFILE_SYMTABS (objfile
, s
)
1100 patch_opaque_types (s
);
1102 current_objfile
= NULL
;
1105 /* Routines for reading headers and symbols from executable. */
1107 /* Read the next symbol, swap it, and return it in both internal_syment
1108 form, and coff_symbol form. Also return its first auxent, if any,
1109 in internal_auxent form, and skip any other auxents. */
1112 read_one_sym (struct coff_symbol
*cs
,
1113 struct internal_syment
*sym
,
1114 union internal_auxent
*aux
)
1117 bfd_size_type bytes
;
1119 cs
->c_symnum
= symnum
;
1120 bytes
= bfd_bread (temp_sym
, local_symesz
, nlist_bfd_global
);
1121 if (bytes
!= local_symesz
)
1122 error ("%s: error reading symbols", current_objfile
->name
);
1123 bfd_coff_swap_sym_in (symfile_bfd
, temp_sym
, (char *) sym
);
1124 cs
->c_naux
= sym
->n_numaux
& 0xff;
1125 if (cs
->c_naux
>= 1)
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
);
1130 bfd_coff_swap_aux_in (symfile_bfd
, temp_aux
, sym
->n_type
, sym
->n_sclass
,
1131 0, cs
->c_naux
, (char *) aux
);
1132 /* If more than one aux entry, read past it (only the first aux
1134 for (i
= 1; i
< cs
->c_naux
; i
++)
1136 bytes
= bfd_bread (temp_aux
, local_auxesz
, nlist_bfd_global
);
1137 if (bytes
!= local_auxesz
)
1138 error ("%s: error reading symbols", current_objfile
->name
);
1141 cs
->c_name
= getsymname (sym
);
1142 cs
->c_value
= sym
->n_value
;
1143 cs
->c_sclass
= (sym
->n_sclass
& 0xff);
1144 cs
->c_secnum
= sym
->n_scnum
;
1145 cs
->c_type
= (unsigned) sym
->n_type
;
1146 if (!SDB_TYPE (cs
->c_type
))
1150 if (cs
->c_sclass
& 128)
1151 printf (_("thumb symbol %s, class 0x%x\n"), cs
->c_name
, cs
->c_sclass
);
1154 symnum
+= 1 + cs
->c_naux
;
1156 /* The PE file format stores symbol values as offsets within the
1157 section, rather than as absolute addresses. We correct that
1158 here, if the symbol has an appropriate storage class. FIXME: We
1159 should use BFD to read the symbols, rather than duplicating the
1163 switch (cs
->c_sclass
)
1167 case C_THUMBEXTFUNC
:
1172 case C_THUMBSTATFUNC
:
1178 if (cs
->c_secnum
!= 0)
1179 cs
->c_value
+= cs_section_address (cs
, symfile_bfd
);
1185 /* Support for string table handling */
1187 static char *stringtab
= NULL
;
1190 init_stringtab (bfd
*abfd
, long offset
)
1194 unsigned char lengthbuf
[4];
1198 /* If the file is stripped, the offset might be zero, indicating no
1199 string table. Just return with `stringtab' set to null. */
1203 if (bfd_seek (abfd
, offset
, 0) < 0)
1206 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1207 length
= bfd_h_get_32 (symfile_bfd
, lengthbuf
);
1209 /* If no string table is needed, then the file may end immediately
1210 after the symbols. Just return with `stringtab' set to null. */
1211 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1214 stringtab
= (char *) xmalloc (length
);
1215 /* This is in target format (probably not very useful, and not currently
1216 used), not host format. */
1217 memcpy (stringtab
, lengthbuf
, sizeof lengthbuf
);
1218 if (length
== sizeof length
) /* Empty table -- just the count */
1221 val
= bfd_bread (stringtab
+ sizeof lengthbuf
, length
- sizeof lengthbuf
,
1223 if (val
!= length
- sizeof lengthbuf
|| stringtab
[length
- 1] != '\0')
1230 free_stringtab (void)
1238 free_stringtab_cleanup (void *ignore
)
1244 getsymname (struct internal_syment
*symbol_entry
)
1246 static char buffer
[SYMNMLEN
+ 1];
1249 if (symbol_entry
->_n
._n_n
._n_zeroes
== 0)
1251 /* FIXME: Probably should be detecting corrupt symbol files by
1252 seeing whether offset points to within the stringtab. */
1253 result
= stringtab
+ symbol_entry
->_n
._n_n
._n_offset
;
1257 strncpy (buffer
, symbol_entry
->_n
._n_name
, SYMNMLEN
);
1258 buffer
[SYMNMLEN
] = '\0';
1264 /* Extract the file name from the aux entry of a C_FILE symbol. Return
1265 only the last component of the name. Result is in static storage and
1266 is only good for temporary use. */
1269 coff_getfilename (union internal_auxent
*aux_entry
)
1271 static char buffer
[BUFSIZ
];
1275 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1276 strcpy (buffer
, stringtab
+ aux_entry
->x_file
.x_n
.x_offset
);
1279 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1280 buffer
[FILNMLEN
] = '\0';
1284 /* FIXME: We should not be throwing away the information about what
1285 directory. It should go into dirname of the symtab, or some such
1287 if ((temp
= strrchr (result
, '/')) != NULL
)
1292 /* Support for line number handling. */
1294 static char *linetab
= NULL
;
1295 static long linetab_offset
;
1296 static unsigned long linetab_size
;
1298 /* Read in all the line numbers for fast lookups later. Leave them in
1299 external (unswapped) format in memory; we'll swap them as we enter
1300 them into GDB's data structures. */
1303 init_lineno (bfd
*abfd
, long offset
, int size
)
1307 linetab_offset
= offset
;
1308 linetab_size
= size
;
1315 if (bfd_seek (abfd
, offset
, 0) < 0)
1318 /* Allocate the desired table, plus a sentinel */
1319 linetab
= (char *) xmalloc (size
+ local_linesz
);
1321 val
= bfd_bread (linetab
, size
, abfd
);
1325 /* Terminate it with an all-zero sentinel record */
1326 memset (linetab
+ size
, 0, local_linesz
);
1340 free_linetab_cleanup (void *ignore
)
1345 #if !defined (L_LNNO32)
1346 #define L_LNNO32(lp) ((lp)->l_lnno)
1350 enter_linenos (long file_offset
, int first_line
,
1351 int last_line
, struct objfile
*objfile
)
1353 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1355 struct internal_lineno lptr
;
1359 if (file_offset
< linetab_offset
)
1361 complaint (&symfile_complaints
,
1362 _("Line number pointer %ld lower than start of line numbers"),
1364 if (file_offset
> linetab_size
) /* Too big to be an offset? */
1366 file_offset
+= linetab_offset
; /* Try reading at that linetab offset */
1369 rawptr
= &linetab
[file_offset
- linetab_offset
];
1371 /* skip first line entry for each function */
1372 rawptr
+= local_linesz
;
1373 /* line numbers start at one for the first line of the function */
1376 /* If the line number table is full (e.g. 64K lines in COFF debug
1377 info), the next function's L_LNNO32 might not be zero, so don't
1378 overstep the table's end in any case. */
1379 while (rawptr
<= &linetab
[0] + linetab_size
)
1381 bfd_coff_swap_lineno_in (symfile_bfd
, rawptr
, &lptr
);
1382 rawptr
+= local_linesz
;
1383 /* The next function, or the sentinel, will have L_LNNO32 zero;
1385 if (L_LNNO32 (&lptr
) && L_LNNO32 (&lptr
) <= last_line
)
1387 CORE_ADDR addr
= lptr
.l_addr
.l_paddr
;
1388 addr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1389 record_line (current_subfile
, first_line
+ L_LNNO32 (&lptr
),
1390 gdbarch_addr_bits_remove (gdbarch
, addr
));
1398 patch_type (struct type
*type
, struct type
*real_type
)
1400 struct type
*target
= TYPE_TARGET_TYPE (type
);
1401 struct type
*real_target
= TYPE_TARGET_TYPE (real_type
);
1402 int field_size
= TYPE_NFIELDS (real_target
) * sizeof (struct field
);
1404 TYPE_LENGTH (target
) = TYPE_LENGTH (real_target
);
1405 TYPE_NFIELDS (target
) = TYPE_NFIELDS (real_target
);
1406 TYPE_FIELDS (target
) = (struct field
*) TYPE_ALLOC (target
, field_size
);
1408 memcpy (TYPE_FIELDS (target
), TYPE_FIELDS (real_target
), field_size
);
1410 if (TYPE_NAME (real_target
))
1412 if (TYPE_NAME (target
))
1413 xfree (TYPE_NAME (target
));
1414 TYPE_NAME (target
) = concat (TYPE_NAME (real_target
), (char *)NULL
);
1418 /* Patch up all appropriate typedef symbols in the opaque_type_chains
1419 so that they can be used to print out opaque data structures properly. */
1422 patch_opaque_types (struct symtab
*s
)
1425 struct dict_iterator iter
;
1426 struct symbol
*real_sym
;
1428 /* Go through the per-file symbols only */
1429 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
1430 ALL_BLOCK_SYMBOLS (b
, iter
, real_sym
)
1432 /* Find completed typedefs to use to fix opaque ones.
1433 Remove syms from the chain when their types are stored,
1434 but search the whole chain, as there may be several syms
1435 from different files with the same name. */
1436 if (SYMBOL_CLASS (real_sym
) == LOC_TYPEDEF
1437 && SYMBOL_DOMAIN (real_sym
) == VAR_DOMAIN
1438 && TYPE_CODE (SYMBOL_TYPE (real_sym
)) == TYPE_CODE_PTR
1439 && TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym
))) != 0)
1441 char *name
= SYMBOL_LINKAGE_NAME (real_sym
);
1442 int hash
= hashname (name
);
1443 struct symbol
*sym
, *prev
;
1446 for (sym
= opaque_type_chain
[hash
]; sym
;)
1448 if (name
[0] == SYMBOL_LINKAGE_NAME (sym
)[0]
1449 && strcmp (name
+ 1, SYMBOL_LINKAGE_NAME (sym
) + 1) == 0)
1453 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
1457 opaque_type_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
1460 patch_type (SYMBOL_TYPE (sym
), SYMBOL_TYPE (real_sym
));
1464 sym
= SYMBOL_VALUE_CHAIN (prev
);
1468 sym
= opaque_type_chain
[hash
];
1474 sym
= SYMBOL_VALUE_CHAIN (sym
);
1482 coff_reg_to_regnum (struct symbol
*sym
, struct gdbarch
*gdbarch
)
1484 return gdbarch_sdb_reg_to_regnum (gdbarch
, SYMBOL_VALUE (sym
));
1487 static const struct symbol_register_ops coff_register_funcs
= {
1491 static struct symbol
*
1492 process_coff_symbol (struct coff_symbol
*cs
,
1493 union internal_auxent
*aux
,
1494 struct objfile
*objfile
)
1497 = (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
1498 sizeof (struct symbol
));
1501 memset (sym
, 0, sizeof (struct symbol
));
1503 name
= EXTERNAL_NAME (name
, objfile
->obfd
);
1504 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
1505 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), 1, objfile
);
1507 /* default assumptions */
1508 SYMBOL_VALUE (sym
) = cs
->c_value
;
1509 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1510 SYMBOL_SECTION (sym
) = cs_to_section (cs
, objfile
);
1512 if (ISFCN (cs
->c_type
))
1514 SYMBOL_VALUE (sym
) += ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1516 lookup_function_type (decode_function_type (cs
, cs
->c_type
, aux
, objfile
));
1518 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1519 if (cs
->c_sclass
== C_STAT
|| cs
->c_sclass
== C_THUMBSTAT
1520 || cs
->c_sclass
== C_THUMBSTATFUNC
)
1521 add_symbol_to_list (sym
, &file_symbols
);
1522 else if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
1523 || cs
->c_sclass
== C_THUMBEXTFUNC
)
1524 add_symbol_to_list (sym
, &global_symbols
);
1528 SYMBOL_TYPE (sym
) = decode_type (cs
, cs
->c_type
, aux
, objfile
);
1529 switch (cs
->c_sclass
)
1535 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1536 add_symbol_to_list (sym
, &local_symbols
);
1540 case C_THUMBEXTFUNC
:
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 add_symbol_to_list (sym
, &global_symbols
);
1549 case C_THUMBSTATFUNC
:
1551 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1552 SYMBOL_VALUE_ADDRESS (sym
) = (CORE_ADDR
) cs
->c_value
;
1553 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1554 if (within_function
)
1556 /* Static symbol of local scope */
1557 add_symbol_to_list (sym
, &local_symbols
);
1561 /* Static symbol at top level of file */
1562 add_symbol_to_list (sym
, &file_symbols
);
1566 #ifdef C_GLBLREG /* AMD coff */
1570 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1571 SYMBOL_REGISTER_OPS (sym
) = &coff_register_funcs
;
1572 SYMBOL_VALUE (sym
) = cs
->c_value
;
1573 add_symbol_to_list (sym
, &local_symbols
);
1581 SYMBOL_CLASS (sym
) = LOC_ARG
;
1582 SYMBOL_IS_ARGUMENT (sym
) = 1;
1583 add_symbol_to_list (sym
, &local_symbols
);
1587 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1588 SYMBOL_REGISTER_OPS (sym
) = &coff_register_funcs
;
1589 SYMBOL_IS_ARGUMENT (sym
) = 1;
1590 SYMBOL_VALUE (sym
) = cs
->c_value
;
1591 add_symbol_to_list (sym
, &local_symbols
);
1595 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1596 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1598 /* If type has no name, give it one */
1599 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1601 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1602 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1604 /* If we are giving a name to a type such as "pointer to
1605 foo" or "function returning foo", we better not set
1606 the TYPE_NAME. If the program contains "typedef char
1607 *caddr_t;", we don't want all variables of type char
1608 * to print as caddr_t. This is not just a
1609 consequence of GDB's type management; CC and GCC (at
1610 least through version 2.4) both output variables of
1611 either type char * or caddr_t with the type
1612 refering to the C_TPDEF symbol for caddr_t. If a future
1613 compiler cleans this up it GDB is not ready for it
1614 yet, but if it becomes ready we somehow need to
1615 disable this check (without breaking the PCC/GCC2.4
1620 Fortunately, this check seems not to be necessary
1621 for anything except pointers or functions. */
1625 TYPE_NAME (SYMBOL_TYPE (sym
)) =
1626 concat (SYMBOL_LINKAGE_NAME (sym
), (char *)NULL
);
1629 /* Keep track of any type which points to empty structured type,
1630 so it can be filled from a definition from another file. A
1631 simple forward reference (TYPE_CODE_UNDEF) is not an
1632 empty structured type, though; the forward references
1633 work themselves out via the magic of coff_lookup_type. */
1634 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1635 && TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym
))) == 0
1636 && TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym
)))
1639 int i
= hashname (SYMBOL_LINKAGE_NAME (sym
));
1641 SYMBOL_VALUE_CHAIN (sym
) = opaque_type_chain
[i
];
1642 opaque_type_chain
[i
] = sym
;
1644 add_symbol_to_list (sym
, &file_symbols
);
1650 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1651 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1653 /* Some compilers try to be helpful by inventing "fake"
1654 names for anonymous enums, structures, and unions, like
1655 "~0fake" or ".0fake". Thanks, but no thanks... */
1656 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1657 if (SYMBOL_LINKAGE_NAME (sym
) != NULL
1658 && *SYMBOL_LINKAGE_NAME (sym
) != '~'
1659 && *SYMBOL_LINKAGE_NAME (sym
) != '.')
1660 TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) =
1661 concat (SYMBOL_LINKAGE_NAME (sym
), (char *)NULL
);
1663 add_symbol_to_list (sym
, &file_symbols
);
1673 /* Decode a coff type specifier; return the type that is meant. */
1675 static struct type
*
1676 decode_type (struct coff_symbol
*cs
, unsigned int c_type
,
1677 union internal_auxent
*aux
, struct objfile
*objfile
)
1679 struct type
*type
= 0;
1680 unsigned int new_c_type
;
1682 if (c_type
& ~N_BTMASK
)
1684 new_c_type
= DECREF (c_type
);
1687 type
= decode_type (cs
, new_c_type
, aux
, objfile
);
1688 type
= lookup_pointer_type (type
);
1690 else if (ISFCN (c_type
))
1692 type
= decode_type (cs
, new_c_type
, aux
, objfile
);
1693 type
= lookup_function_type (type
);
1695 else if (ISARY (c_type
))
1698 unsigned short *dim
;
1699 struct type
*base_type
, *index_type
, *range_type
;
1701 /* Define an array type. */
1702 /* auxent refers to array, not base type */
1703 if (aux
->x_sym
.x_tagndx
.l
== 0)
1706 /* shift the indices down */
1707 dim
= &aux
->x_sym
.x_fcnary
.x_ary
.x_dimen
[0];
1710 for (i
= 0; *dim
&& i
< DIMNUM
- 1; i
++, dim
++)
1714 base_type
= decode_type (cs
, new_c_type
, aux
, objfile
);
1715 index_type
= objfile_type (objfile
)->builtin_int
;
1717 create_range_type ((struct type
*) NULL
, index_type
, 0, n
- 1);
1719 create_array_type ((struct type
*) NULL
, base_type
, range_type
);
1724 /* Reference to existing type. This only occurs with the
1725 struct, union, and enum types. EPI a29k coff
1726 fakes us out by producing aux entries with a nonzero
1727 x_tagndx for definitions of structs, unions, and enums, so we
1728 have to check the c_sclass field. SCO 3.2v4 cc gets confused
1729 with pointers to pointers to defined structs, and generates
1730 negative x_tagndx fields. */
1731 if (cs
->c_naux
> 0 && aux
->x_sym
.x_tagndx
.l
!= 0)
1733 if (cs
->c_sclass
!= C_STRTAG
1734 && cs
->c_sclass
!= C_UNTAG
1735 && cs
->c_sclass
!= C_ENTAG
1736 && aux
->x_sym
.x_tagndx
.l
>= 0)
1738 type
= coff_alloc_type (aux
->x_sym
.x_tagndx
.l
);
1743 complaint (&symfile_complaints
,
1744 _("Symbol table entry for %s has bad tagndx value"),
1746 /* And fall through to decode_base_type... */
1750 return decode_base_type (cs
, BTYPE (c_type
), aux
, objfile
);
1753 /* Decode a coff type specifier for function definition;
1754 return the type that the function returns. */
1756 static struct type
*
1757 decode_function_type (struct coff_symbol
*cs
, unsigned int c_type
,
1758 union internal_auxent
*aux
, struct objfile
*objfile
)
1760 if (aux
->x_sym
.x_tagndx
.l
== 0)
1761 cs
->c_naux
= 0; /* auxent refers to function, not base type */
1763 return decode_type (cs
, DECREF (c_type
), aux
, objfile
);
1768 static struct type
*
1769 decode_base_type (struct coff_symbol
*cs
, unsigned int c_type
,
1770 union internal_auxent
*aux
, struct objfile
*objfile
)
1772 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1778 /* shows up with "void (*foo)();" structure members */
1779 return objfile_type (objfile
)->builtin_void
;
1783 /* Intel 960 COFF has this symbol and meaning. */
1784 return objfile_type (objfile
)->builtin_void
;
1788 return objfile_type (objfile
)->builtin_char
;
1791 return objfile_type (objfile
)->builtin_short
;
1794 return objfile_type (objfile
)->builtin_int
;
1797 if (cs
->c_sclass
== C_FIELD
1798 && aux
->x_sym
.x_misc
.x_lnsz
.x_size
1799 > gdbarch_long_bit (gdbarch
))
1800 return objfile_type (objfile
)->builtin_long_long
;
1802 return objfile_type (objfile
)->builtin_long
;
1805 return objfile_type (objfile
)->builtin_float
;
1808 return objfile_type (objfile
)->builtin_double
;
1811 return objfile_type (objfile
)->builtin_long_double
;
1814 if (cs
->c_naux
!= 1)
1816 /* anonymous structure type */
1817 type
= coff_alloc_type (cs
->c_symnum
);
1818 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
1819 TYPE_NAME (type
) = NULL
;
1820 /* This used to set the tag to "<opaque>". But I think setting it
1821 to NULL is right, and the printing code can print it as
1823 TYPE_TAG_NAME (type
) = NULL
;
1824 INIT_CPLUS_SPECIFIC (type
);
1825 TYPE_LENGTH (type
) = 0;
1826 TYPE_FIELDS (type
) = 0;
1827 TYPE_NFIELDS (type
) = 0;
1831 type
= coff_read_struct_type (cs
->c_symnum
,
1832 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1833 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
,
1839 if (cs
->c_naux
!= 1)
1841 /* anonymous union type */
1842 type
= coff_alloc_type (cs
->c_symnum
);
1843 TYPE_NAME (type
) = NULL
;
1844 /* This used to set the tag to "<opaque>". But I think setting it
1845 to NULL is right, and the printing code can print it as
1847 TYPE_TAG_NAME (type
) = NULL
;
1848 INIT_CPLUS_SPECIFIC (type
);
1849 TYPE_LENGTH (type
) = 0;
1850 TYPE_FIELDS (type
) = 0;
1851 TYPE_NFIELDS (type
) = 0;
1855 type
= coff_read_struct_type (cs
->c_symnum
,
1856 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1857 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
,
1860 TYPE_CODE (type
) = TYPE_CODE_UNION
;
1864 if (cs
->c_naux
!= 1)
1866 /* anonymous enum type */
1867 type
= coff_alloc_type (cs
->c_symnum
);
1868 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
1869 TYPE_NAME (type
) = NULL
;
1870 /* This used to set the tag to "<opaque>". But I think setting it
1871 to NULL is right, and the printing code can print it as
1873 TYPE_TAG_NAME (type
) = NULL
;
1874 TYPE_LENGTH (type
) = 0;
1875 TYPE_FIELDS (type
) = 0;
1876 TYPE_NFIELDS (type
) = 0;
1880 type
= coff_read_enum_type (cs
->c_symnum
,
1881 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1882 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
,
1888 /* shouldn't show up here */
1892 return objfile_type (objfile
)->builtin_unsigned_char
;
1895 return objfile_type (objfile
)->builtin_unsigned_short
;
1898 return objfile_type (objfile
)->builtin_unsigned_int
;
1901 if (cs
->c_sclass
== C_FIELD
1902 && aux
->x_sym
.x_misc
.x_lnsz
.x_size
1903 > gdbarch_long_bit (gdbarch
))
1904 return objfile_type (objfile
)->builtin_unsigned_long_long
;
1906 return objfile_type (objfile
)->builtin_unsigned_long
;
1908 complaint (&symfile_complaints
, _("Unexpected type for symbol %s"), cs
->c_name
);
1909 return objfile_type (objfile
)->builtin_void
;
1912 /* This page contains subroutines of read_type. */
1914 /* Read the description of a structure (or union type) and return an
1915 object describing the type. */
1917 static struct type
*
1918 coff_read_struct_type (int index
, int length
, int lastsym
,
1919 struct objfile
*objfile
)
1923 struct nextfield
*next
;
1928 struct nextfield
*list
= 0;
1929 struct nextfield
*new;
1933 struct coff_symbol member_sym
;
1934 struct coff_symbol
*ms
= &member_sym
;
1935 struct internal_syment sub_sym
;
1936 union internal_auxent sub_aux
;
1939 type
= coff_alloc_type (index
);
1940 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
1941 INIT_CPLUS_SPECIFIC (type
);
1942 TYPE_LENGTH (type
) = length
;
1944 while (!done
&& symnum
< lastsym
&& symnum
< nlist_nsyms_global
)
1946 read_one_sym (ms
, &sub_sym
, &sub_aux
);
1948 name
= EXTERNAL_NAME (name
, objfile
->obfd
);
1950 switch (ms
->c_sclass
)
1955 /* Get space to record the next field's data. */
1956 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
1960 /* Save the data. */
1962 obsavestring (name
, strlen (name
), &objfile
->objfile_obstack
);
1963 FIELD_TYPE (list
->field
) = decode_type (ms
, ms
->c_type
, &sub_aux
,
1965 SET_FIELD_BITPOS (list
->field
, 8 * ms
->c_value
);
1966 FIELD_BITSIZE (list
->field
) = 0;
1972 /* Get space to record the next field's data. */
1973 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
1977 /* Save the data. */
1979 obsavestring (name
, strlen (name
), &objfile
->objfile_obstack
);
1980 FIELD_TYPE (list
->field
) = decode_type (ms
, ms
->c_type
, &sub_aux
,
1982 SET_FIELD_BITPOS (list
->field
, ms
->c_value
);
1983 FIELD_BITSIZE (list
->field
) = sub_aux
.x_sym
.x_misc
.x_lnsz
.x_size
;
1992 /* Now create the vector of fields, and record how big it is. */
1994 TYPE_NFIELDS (type
) = nfields
;
1995 TYPE_FIELDS (type
) = (struct field
*)
1996 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
1998 /* Copy the saved-up fields into the field vector. */
2000 for (n
= nfields
; list
; list
= list
->next
)
2001 TYPE_FIELD (type
, --n
) = list
->field
;
2006 /* Read a definition of an enumeration type,
2007 and create and return a suitable type object.
2008 Also defines the symbols that represent the values of the type. */
2010 static struct type
*
2011 coff_read_enum_type (int index
, int length
, int lastsym
,
2012 struct objfile
*objfile
)
2014 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2019 struct pending
**symlist
;
2020 struct coff_symbol member_sym
;
2021 struct coff_symbol
*ms
= &member_sym
;
2022 struct internal_syment sub_sym
;
2023 union internal_auxent sub_aux
;
2024 struct pending
*osyms
, *syms
;
2028 int unsigned_enum
= 1;
2030 type
= coff_alloc_type (index
);
2031 if (within_function
)
2032 symlist
= &local_symbols
;
2034 symlist
= &file_symbols
;
2036 o_nsyms
= osyms
? osyms
->nsyms
: 0;
2038 while (!done
&& symnum
< lastsym
&& symnum
< nlist_nsyms_global
)
2040 read_one_sym (ms
, &sub_sym
, &sub_aux
);
2042 name
= EXTERNAL_NAME (name
, objfile
->obfd
);
2044 switch (ms
->c_sclass
)
2047 sym
= (struct symbol
*) obstack_alloc
2048 (&objfile
->objfile_obstack
, sizeof (struct symbol
));
2049 memset (sym
, 0, sizeof (struct symbol
));
2051 SYMBOL_SET_LINKAGE_NAME (sym
,
2052 obsavestring (name
, strlen (name
),
2053 &objfile
->objfile_obstack
));
2054 SYMBOL_CLASS (sym
) = LOC_CONST
;
2055 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
2056 SYMBOL_VALUE (sym
) = ms
->c_value
;
2057 add_symbol_to_list (sym
, symlist
);
2062 /* Sometimes the linker (on 386/ix 2.0.2 at least) screws
2063 up the count of how many symbols to read. So stop
2070 /* Now fill in the fields of the type-structure. */
2073 TYPE_LENGTH (type
) = length
;
2074 else /* Assume ints. */
2075 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
;
2076 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
2077 TYPE_NFIELDS (type
) = nsyms
;
2078 TYPE_FIELDS (type
) = (struct field
*)
2079 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
2081 /* Find the symbols for the values and put them into the type.
2082 The symbols can be found in the symlist that we put them on
2083 to cause them to be defined. osyms contains the old value
2084 of that symlist; everything up to there was defined by us. */
2085 /* Note that we preserve the order of the enum constants, so
2086 that in something like "enum {FOO, LAST_THING=FOO}" we print
2087 FOO, not LAST_THING. */
2089 for (syms
= *symlist
, n
= 0; syms
; syms
= syms
->next
)
2095 for (; j
< syms
->nsyms
; j
++, n
++)
2097 struct symbol
*xsym
= syms
->symbol
[j
];
2098 SYMBOL_TYPE (xsym
) = type
;
2099 TYPE_FIELD_NAME (type
, n
) = SYMBOL_LINKAGE_NAME (xsym
);
2100 SET_FIELD_BITPOS (TYPE_FIELD (type
, n
), SYMBOL_VALUE (xsym
));
2101 if (SYMBOL_VALUE (xsym
) < 0)
2103 TYPE_FIELD_BITSIZE (type
, n
) = 0;
2110 TYPE_UNSIGNED (type
) = 1;
2115 /* Register our ability to parse symbols for coff BFD files. */
2117 static struct sym_fns coff_sym_fns
=
2119 bfd_target_coff_flavour
,
2120 coff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2121 coff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2122 coff_symfile_read
, /* sym_read: read a symbol file into symtab */
2123 coff_symfile_finish
, /* sym_finish: finished with file, cleanup */
2124 default_symfile_offsets
, /* sym_offsets: xlate external to internal form */
2125 default_symfile_segments
, /* sym_segments: Get segment information from
2127 NULL
, /* sym_read_linetable */
2128 NULL
/* next: pointer to next struct sym_fns */
2132 _initialize_coffread (void)
2134 add_symtab_fns (&coff_sym_fns
);