1 /* Read coff symbol tables and convert to internal format, for GDB.
2 Copyright 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
3 1997, 1998, 1999, 2000, 2001, 2002
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 2 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, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "breakpoint.h"
33 #include "gdb_string.h"
36 #include "coff/internal.h" /* Internal format of COFF symbols in BFD */
37 #include "libcoff.h" /* FIXME secret internal data from BFD */
42 #include "gdb-stabs.h"
43 #include "stabsread.h"
44 #include "complaints.h"
46 #include "gdb_assert.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 /* Complaints about various problems in the file being read */
127 struct complaint ef_complaint
=
128 {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0};
130 struct complaint ef_stack_complaint
=
131 {"`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d", 0, 0};
133 struct complaint eb_stack_complaint
=
134 {"`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d", 0, 0};
136 struct complaint bf_no_aux_complaint
=
137 {"`.bf' symbol %d has no aux entry", 0, 0};
139 struct complaint ef_no_aux_complaint
=
140 {"`.ef' symbol %d has no aux entry", 0, 0};
142 struct complaint lineno_complaint
=
143 {"Line number pointer %d lower than start of line numbers", 0, 0};
145 struct complaint unexpected_type_complaint
=
146 {"Unexpected type for symbol %s", 0, 0};
148 struct complaint bad_sclass_complaint
=
149 {"Bad n_sclass for symbol %s", 0, 0};
151 struct complaint misordered_blocks_complaint
=
152 {"Blocks out of order at address %x", 0, 0};
154 struct complaint tagndx_bad_complaint
=
155 {"Symbol table entry for %s has bad tagndx value", 0, 0};
157 struct complaint eb_complaint
=
158 {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0};
160 /* Simplified internal version of coff symbol table information */
165 int c_symnum
; /* symbol number of this entry */
166 int c_naux
; /* 0 if syment only, 1 if syment + auxent, etc */
173 extern void stabsread_clear_cache (void);
175 static struct type
*coff_read_struct_type (int, int, int);
177 static struct type
*decode_base_type (struct coff_symbol
*,
178 unsigned int, union internal_auxent
*);
180 static struct type
*decode_type (struct coff_symbol
*, unsigned int,
181 union internal_auxent
*);
183 static struct type
*decode_function_type (struct coff_symbol
*,
185 union internal_auxent
*);
187 static struct type
*coff_read_enum_type (int, int, int);
189 static struct symbol
*process_coff_symbol (struct coff_symbol
*,
190 union internal_auxent
*,
193 static void patch_opaque_types (struct symtab
*);
195 static void enter_linenos (long, int, int, struct objfile
*);
197 static void free_linetab (void);
199 static void free_linetab_cleanup (void *ignore
);
201 static int init_lineno (bfd
*, long, int);
203 static char *getsymname (struct internal_syment
*);
205 static char *coff_getfilename (union internal_auxent
*);
207 static void free_stringtab (void);
209 static void free_stringtab_cleanup (void *ignore
);
211 static int init_stringtab (bfd
*, long);
213 static void read_one_sym (struct coff_symbol
*,
214 struct internal_syment
*, union internal_auxent
*);
216 static void coff_symtab_read (long, unsigned int, struct objfile
*);
218 /* We are called once per section from coff_symfile_read. We
219 need to examine each section we are passed, check to see
220 if it is something we are interested in processing, and
221 if so, stash away some access information for the section.
223 FIXME: The section names should not be hardwired strings (what
224 should they be? I don't think most object file formats have enough
225 section flags to specify what kind of debug section it is
229 coff_locate_sections (bfd
*abfd
, asection
*sectp
, void *csip
)
231 register struct coff_symfile_info
*csi
;
234 csi
= (struct coff_symfile_info
*) csip
;
235 name
= bfd_get_section_name (abfd
, sectp
);
236 if (STREQ (name
, ".text"))
238 csi
->textaddr
= bfd_section_vma (abfd
, sectp
);
239 csi
->textsize
+= bfd_section_size (abfd
, sectp
);
241 else if (strncmp (name
, ".text", sizeof ".text" - 1) == 0)
243 csi
->textsize
+= bfd_section_size (abfd
, sectp
);
245 else if (STREQ (name
, ".stabstr"))
247 csi
->stabstrsect
= sectp
;
249 else if (strncmp (name
, ".stab", sizeof ".stab" - 1) == 0)
253 /* We can have multiple .stab sections if linked with
255 for (s
= name
+ sizeof ".stab" - 1; *s
!= '\0'; s
++)
260 struct stab_section_list
*n
, **pn
;
262 n
= ((struct stab_section_list
*)
263 xmalloc (sizeof (struct stab_section_list
)));
266 for (pn
= &csi
->stabsects
; *pn
!= NULL
; pn
= &(*pn
)->next
)
270 /* This will be run after coffstab_build_psymtabs is called
271 in coff_symfile_read, at which point we no longer need
273 make_cleanup (xfree
, n
);
278 /* Return the section_offsets* that CS points to. */
279 static int cs_to_section (struct coff_symbol
*, struct objfile
*);
281 struct find_targ_sec_arg
288 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
290 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
291 if (sect
->target_index
== args
->targ_index
)
292 *args
->resultp
= sect
;
295 /* Return the section number (SECT_OFF_*) that CS points to. */
297 cs_to_section (struct coff_symbol
*cs
, struct objfile
*objfile
)
299 asection
*sect
= NULL
;
300 struct find_targ_sec_arg args
;
301 int off
= SECT_OFF_TEXT (objfile
);
303 args
.targ_index
= cs
->c_secnum
;
304 args
.resultp
= §
;
305 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
308 /* This is the section. Figure out what SECT_OFF_* code it is. */
309 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
310 off
= SECT_OFF_TEXT (objfile
);
311 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
312 off
= SECT_OFF_DATA (objfile
);
314 /* Just return the bfd section index. */
320 /* Return the address of the section of a COFF symbol. */
322 static CORE_ADDR
cs_section_address (struct coff_symbol
*, bfd
*);
325 cs_section_address (struct coff_symbol
*cs
, bfd
*abfd
)
327 asection
*sect
= NULL
;
328 struct find_targ_sec_arg args
;
331 args
.targ_index
= cs
->c_secnum
;
332 args
.resultp
= §
;
333 bfd_map_over_sections (abfd
, find_targ_sec
, &args
);
335 addr
= bfd_get_section_vma (objfile
->obfd
, sect
);
339 /* Look up a coff type-number index. Return the address of the slot
340 where the type for that index is stored.
341 The type-number is in INDEX.
343 This can be used for finding the type associated with that index
344 or for associating a new type with the index. */
346 static struct type
**
347 coff_lookup_type (register int index
)
349 if (index
>= type_vector_length
)
351 int old_vector_length
= type_vector_length
;
353 type_vector_length
*= 2;
354 if (index
/* is still */ >= type_vector_length
)
355 type_vector_length
= index
* 2;
357 type_vector
= (struct type
**)
358 xrealloc ((char *) type_vector
,
359 type_vector_length
* sizeof (struct type
*));
360 memset (&type_vector
[old_vector_length
], 0,
361 (type_vector_length
- old_vector_length
) * sizeof (struct type
*));
363 return &type_vector
[index
];
366 /* Make sure there is a type allocated for type number index
367 and return the type object.
368 This can create an empty (zeroed) type object. */
371 coff_alloc_type (int index
)
373 register struct type
**type_addr
= coff_lookup_type (index
);
374 register struct type
*type
= *type_addr
;
376 /* If we are referring to a type not known at all yet,
377 allocate an empty type for it.
378 We will fill it in later if we find out how. */
381 type
= alloc_type (current_objfile
);
387 /* Start a new symtab for a new source file.
388 This is called when a COFF ".file" symbol is seen;
389 it indicates the start of data for one original source file. */
392 coff_start_symtab (char *name
)
395 /* We fill in the filename later. start_symtab puts
396 this pointer into last_source_file and we put it in
397 subfiles->name, which end_symtab frees; that's why
398 it must be malloc'd. */
399 savestring (name
, strlen (name
)),
400 /* We never know the directory name for COFF. */
402 /* The start address is irrelevant, since we set
403 last_source_start_addr in coff_end_symtab. */
405 record_debugformat ("COFF");
408 /* Save the vital information from when starting to read a file,
409 for use when closing off the current file.
410 NAME is the file name the symbols came from, START_ADDR is the first
411 text address for the file, and SIZE is the number of bytes of text. */
414 complete_symtab (char *name
, CORE_ADDR start_addr
, unsigned int size
)
416 if (last_source_file
!= NULL
)
417 xfree (last_source_file
);
418 last_source_file
= savestring (name
, strlen (name
));
419 current_source_start_addr
= start_addr
;
420 current_source_end_addr
= start_addr
+ size
;
422 if (current_objfile
->ei
.entry_point
>= current_source_start_addr
&&
423 current_objfile
->ei
.entry_point
< current_source_end_addr
)
425 current_objfile
->ei
.entry_file_lowpc
= current_source_start_addr
;
426 current_objfile
->ei
.entry_file_highpc
= current_source_end_addr
;
430 /* Finish the symbol definitions for one main source file,
431 close off all the lexical contexts for that file
432 (creating struct block's for them), then make the
433 struct symtab for that file and put it in the list of all such. */
436 coff_end_symtab (struct objfile
*objfile
)
438 struct symtab
*symtab
;
440 last_source_start_addr
= current_source_start_addr
;
442 symtab
= end_symtab (current_source_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
445 free_named_symtabs (symtab
->filename
);
447 /* Reinitialize for beginning of new file. */
448 last_source_file
= NULL
;
452 record_minimal_symbol (char *name
, CORE_ADDR address
,
453 enum minimal_symbol_type type
, struct objfile
*objfile
)
455 /* We don't want TDESC entry points in the minimal symbol table */
459 prim_record_minimal_symbol (name
, address
, type
, objfile
);
462 /* coff_symfile_init ()
463 is the coff-specific initialization routine for reading symbols.
464 It is passed a struct objfile which contains, among other things,
465 the BFD for the file whose symbols are being read, and a slot for
466 a pointer to "private data" which we fill with cookies and other
467 treats for coff_symfile_read ().
469 We will only be called if this is a COFF or COFF-like file.
470 BFD handles figuring out the format of the file, and code in symtab.c
471 uses BFD's determination to vector to us.
473 The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
476 coff_symfile_init (struct objfile
*objfile
)
478 /* Allocate struct to keep track of stab reading. */
479 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
480 xmmalloc (objfile
->md
, sizeof (struct dbx_symfile_info
));
482 memset (objfile
->sym_stab_info
, 0,
483 sizeof (struct dbx_symfile_info
));
485 /* Allocate struct to keep track of the symfile */
486 objfile
->sym_private
= xmmalloc (objfile
->md
,
487 sizeof (struct coff_symfile_info
));
489 memset (objfile
->sym_private
, 0, sizeof (struct coff_symfile_info
));
491 /* COFF objects may be reordered, so set OBJF_REORDERED. If we
492 find this causes a significant slowdown in gdb then we could
493 set it in the debug symbol readers only when necessary. */
494 objfile
->flags
|= OBJF_REORDERED
;
496 init_entry_point_info (objfile
);
499 /* This function is called for every section; it finds the outer limits
500 of the line table (minimum and maximum file offset) so that the
501 mainline code can read the whole thing for efficiency. */
505 find_linenos (bfd
*abfd
, sec_ptr asect
, void *vpinfo
)
507 struct coff_symfile_info
*info
;
509 file_ptr offset
, maxoff
;
511 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
512 count
= asect
->lineno_count
;
517 size
= count
* local_linesz
;
519 info
= (struct coff_symfile_info
*) vpinfo
;
520 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
521 offset
= asect
->line_filepos
;
524 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
525 info
->min_lineno_offset
= offset
;
527 maxoff
= offset
+ size
;
528 if (maxoff
> info
->max_lineno_offset
)
529 info
->max_lineno_offset
= maxoff
;
533 /* The BFD for this file -- only good while we're actively reading
534 symbols into a psymtab or a symtab. */
536 static bfd
*symfile_bfd
;
538 /* Read a symbol file, after initialization by coff_symfile_init. */
542 coff_symfile_read (struct objfile
*objfile
, int mainline
)
544 struct coff_symfile_info
*info
;
545 struct dbx_symfile_info
*dbxinfo
;
546 bfd
*abfd
= objfile
->obfd
;
547 coff_data_type
*cdata
= coff_data (abfd
);
548 char *name
= bfd_get_filename (abfd
);
550 unsigned int num_symbols
;
552 int stringtab_offset
;
553 struct cleanup
*back_to
;
558 info
= (struct coff_symfile_info
*) objfile
->sym_private
;
559 dbxinfo
= objfile
->sym_stab_info
;
560 symfile_bfd
= abfd
; /* Kludge for swap routines */
562 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
563 num_symbols
= bfd_get_symcount (abfd
); /* How many syms */
564 symtab_offset
= cdata
->sym_filepos
; /* Symbol table file offset */
565 stringtab_offset
= symtab_offset
+ /* String table file offset */
566 num_symbols
* cdata
->local_symesz
;
568 /* Set a few file-statics that give us specific information about
569 the particular COFF file format we're reading. */
570 local_n_btmask
= cdata
->local_n_btmask
;
571 local_n_btshft
= cdata
->local_n_btshft
;
572 local_n_tmask
= cdata
->local_n_tmask
;
573 local_n_tshift
= cdata
->local_n_tshift
;
574 local_linesz
= cdata
->local_linesz
;
575 local_symesz
= cdata
->local_symesz
;
576 local_auxesz
= cdata
->local_auxesz
;
578 /* Allocate space for raw symbol and aux entries, based on their
579 space requirements as reported by BFD. */
580 temp_sym
= (char *) xmalloc
581 (cdata
->local_symesz
+ cdata
->local_auxesz
);
582 temp_aux
= temp_sym
+ cdata
->local_symesz
;
583 back_to
= make_cleanup (free_current_contents
, &temp_sym
);
585 /* We need to know whether this is a PE file, because in PE files,
586 unlike standard COFF files, symbol values are stored as offsets
587 from the section address, rather than as absolute addresses.
588 FIXME: We should use BFD to read the symbol table, and thus avoid
591 strncmp (bfd_get_target (objfile
->obfd
), "pe", 2) == 0
592 || strncmp (bfd_get_target (objfile
->obfd
), "epoc-pe", 7) == 0;
596 /* Read the line number table, all at once. */
597 info
->min_lineno_offset
= 0;
598 info
->max_lineno_offset
= 0;
599 bfd_map_over_sections (abfd
, find_linenos
, (void *) info
);
601 make_cleanup (free_linetab_cleanup
, 0 /*ignore*/);
602 val
= init_lineno (abfd
, info
->min_lineno_offset
,
603 info
->max_lineno_offset
- info
->min_lineno_offset
);
605 error ("\"%s\": error reading line numbers\n", name
);
607 /* Now read the string table, all at once. */
609 make_cleanup (free_stringtab_cleanup
, 0 /*ignore*/);
610 val
= init_stringtab (abfd
, stringtab_offset
);
612 error ("\"%s\": can't get string table", name
);
614 init_minimal_symbol_collection ();
615 make_cleanup_discard_minimal_symbols ();
617 /* Now that the executable file is positioned at symbol table,
618 process it and define symbols accordingly. */
620 coff_symtab_read ((long) symtab_offset
, num_symbols
, objfile
);
622 /* Sort symbols alphabetically within each block. */
627 for (s
= objfile
->symtabs
; s
!= NULL
; s
= s
->next
)
628 sort_symtab_syms (s
);
631 /* Install any minimal symbols that have been collected as the current
632 minimal symbols for this objfile. */
634 install_minimal_symbols (objfile
);
636 bfd_map_over_sections (abfd
, coff_locate_sections
, (void *) info
);
640 if (!info
->stabstrsect
)
642 error (("The debugging information in `%s' is corrupted.\n"
643 "The file has a `.stabs' section, but no `.stabstr' "
648 /* FIXME: dubious. Why can't we use something normal like
649 bfd_get_section_contents? */
650 bfd_seek (abfd
, abfd
->where
, 0);
652 stabstrsize
= bfd_section_size (abfd
, info
->stabstrsect
);
654 coffstab_build_psymtabs (objfile
,
656 info
->textaddr
, info
->textsize
,
658 info
->stabstrsect
->filepos
, stabstrsize
);
660 if (dwarf2_has_info (abfd
))
662 /* DWARF2 sections. */
663 dwarf2_build_psymtabs (objfile
, mainline
);
666 do_cleanups (back_to
);
670 coff_new_init (struct objfile
*ignore
)
674 /* Perform any local cleanups required when we are done with a particular
675 objfile. I.E, we are in the process of discarding all symbol information
676 for an objfile, freeing up all memory held for it, and unlinking the
677 objfile struct from the global list of known objfiles. */
680 coff_symfile_finish (struct objfile
*objfile
)
682 if (objfile
->sym_private
!= NULL
)
684 xmfree (objfile
->md
, objfile
->sym_private
);
687 /* Let stabs reader clean up */
688 stabsread_clear_cache ();
692 /* Given pointers to a symbol table in coff style exec file,
693 analyze them and create struct symtab's describing the symbols.
694 NSYMS is the number of symbols in the symbol table.
695 We read them one at a time using read_one_sym (). */
698 coff_symtab_read (long symtab_offset
, unsigned int nsyms
,
699 struct objfile
*objfile
)
701 register struct context_stack
*new;
702 struct coff_symbol coff_symbol
;
703 register struct coff_symbol
*cs
= &coff_symbol
;
704 static struct internal_syment main_sym
;
705 static union internal_auxent main_aux
;
706 struct coff_symbol fcn_cs_saved
;
707 static struct internal_syment fcn_sym_saved
;
708 static union internal_auxent fcn_aux_saved
;
710 /* A .file is open. */
711 int in_source_file
= 0;
712 int next_file_symnum
= -1;
713 /* Name of the current file. */
714 char *filestring
= "";
716 int fcn_first_line
= 0;
717 CORE_ADDR fcn_first_line_addr
= 0;
718 int fcn_last_line
= 0;
719 int fcn_start_addr
= 0;
720 long fcn_line_ptr
= 0;
724 /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous....
725 it's hard to know I've really worked around it. The fix should be
726 harmless, anyway). The symptom of the bug is that the first
727 fread (in read_one_sym), will (in my example) actually get data
728 from file offset 268, when the fseek was to 264 (and ftell shows
729 264). This causes all hell to break loose. I was unable to
730 reproduce this on a short test program which operated on the same
731 file, performing (I think) the same sequence of operations.
733 It stopped happening when I put in this (former) rewind().
735 FIXME: Find out if this has been reported to Sun, whether it has
736 been fixed in a later release, etc. */
738 bfd_seek (objfile
->obfd
, 0, 0);
740 /* Position to read the symbol table. */
741 val
= bfd_seek (objfile
->obfd
, (long) symtab_offset
, 0);
743 perror_with_name (objfile
->name
);
745 current_objfile
= objfile
;
746 nlist_bfd_global
= objfile
->obfd
;
747 nlist_nsyms_global
= nsyms
;
748 last_source_file
= NULL
;
749 memset (opaque_type_chain
, 0, sizeof opaque_type_chain
);
751 if (type_vector
) /* Get rid of previous one */
753 type_vector_length
= 160;
754 type_vector
= (struct type
**)
755 xmalloc (type_vector_length
* sizeof (struct type
*));
756 memset (type_vector
, 0, type_vector_length
* sizeof (struct type
*));
758 coff_start_symtab ("");
761 while (symnum
< nsyms
)
763 QUIT
; /* Make this command interruptable. */
765 read_one_sym (cs
, &main_sym
, &main_aux
);
767 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
769 if (last_source_file
)
770 coff_end_symtab (objfile
);
772 coff_start_symtab ("_globals_");
773 complete_symtab ("_globals_", 0, 0);
774 /* done with all files, everything from here on out is globals */
777 /* Special case for file with type declarations only, no text. */
778 if (!last_source_file
&& SDB_TYPE (cs
->c_type
)
779 && cs
->c_secnum
== N_DEBUG
)
780 complete_symtab (filestring
, 0, 0);
782 /* Typedefs should not be treated as symbol definitions. */
783 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
785 /* Record all functions -- external and static -- in minsyms. */
786 tmpaddr
= cs
->c_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
787 record_minimal_symbol (cs
->c_name
, tmpaddr
, mst_text
, objfile
);
789 fcn_line_ptr
= main_aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
790 fcn_start_addr
= tmpaddr
;
792 fcn_sym_saved
= main_sym
;
793 fcn_aux_saved
= main_aux
;
797 switch (cs
->c_sclass
)
806 complain (&bad_sclass_complaint
, cs
->c_name
);
810 /* c_value field contains symnum of next .file entry in table
811 or symnum of first global after last .file. */
812 next_file_symnum
= cs
->c_value
;
814 filestring
= coff_getfilename (&main_aux
);
818 /* Complete symbol table for last object file
819 containing debugging information. */
820 if (last_source_file
)
822 coff_end_symtab (objfile
);
823 coff_start_symtab (filestring
);
828 /* C_LABEL is used for labels and static functions. Including
829 it here allows gdb to see static functions when no debug
830 info is available. */
832 /* However, labels within a function can make weird backtraces,
833 so filter them out (from phdm@macqel.be). */
839 case C_THUMBSTATFUNC
:
840 if (cs
->c_name
[0] == '.')
842 if (STREQ (cs
->c_name
, ".text"))
844 /* FIXME: don't wire in ".text" as section name
846 /* Check for in_source_file deals with case of
847 a file with debugging symbols
848 followed by a later file with no symbols. */
850 complete_symtab (filestring
,
851 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)),
852 main_aux
.x_scn
.x_scnlen
);
855 /* flush rest of '.' symbols */
858 else if (!SDB_TYPE (cs
->c_type
)
859 && cs
->c_name
[0] == 'L'
860 && (strncmp (cs
->c_name
, "LI%", 3) == 0
861 || strncmp (cs
->c_name
, "LF%", 3) == 0
862 || strncmp (cs
->c_name
, "LC%", 3) == 0
863 || strncmp (cs
->c_name
, "LP%", 3) == 0
864 || strncmp (cs
->c_name
, "LPB%", 4) == 0
865 || strncmp (cs
->c_name
, "LBB%", 4) == 0
866 || strncmp (cs
->c_name
, "LBE%", 4) == 0
867 || strncmp (cs
->c_name
, "LPBX%", 5) == 0))
868 /* At least on a 3b1, gcc generates swbeg and string labels
869 that look like this. Ignore them. */
871 /* fall in for static symbols that don't start with '.' */
876 /* Record it in the minimal symbols regardless of
877 SDB_TYPE. This parallels what we do for other debug
878 formats, and probably is needed to make
879 print_address_symbolic work right without the (now
880 gone) "set fast-symbolic-addr off" kludge. */
882 /* FIXME: should use mst_abs, and not relocate, if absolute. */
883 enum minimal_symbol_type ms_type
;
886 if (cs
->c_secnum
== N_UNDEF
)
888 /* This is a common symbol. See if the target
889 environment knows where it has been relocated to. */
891 if (target_lookup_symbol (cs
->c_name
, &reladdr
))
893 /* Error in lookup; ignore symbol. */
897 /* The address has already been relocated; make sure that
898 objfile_relocate doesn't relocate it again. */
900 ms_type
= cs
->c_sclass
== C_EXT
901 || cs
->c_sclass
== C_THUMBEXT
?
902 mst_bss
: mst_file_bss
;
906 sec
= cs_to_section (cs
, objfile
);
907 tmpaddr
= cs
->c_value
;
908 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXTFUNC
909 || cs
->c_sclass
== C_THUMBEXT
)
910 tmpaddr
+= ANOFFSET (objfile
->section_offsets
, sec
);
912 if (sec
== SECT_OFF_TEXT (objfile
))
915 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXTFUNC
916 || cs
->c_sclass
== C_THUMBEXT
?
917 mst_text
: mst_file_text
;
918 tmpaddr
= SMASH_TEXT_ADDRESS (tmpaddr
);
920 else if (sec
== SECT_OFF_DATA (objfile
))
923 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
?
924 mst_data
: mst_file_data
;
926 else if (sec
== SECT_OFF_BSS (objfile
))
929 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
?
930 mst_data
: mst_file_data
;
933 ms_type
= mst_unknown
;
936 if (cs
->c_name
[0] != '@' /* Skip tdesc symbols */ )
938 struct minimal_symbol
*msym
;
940 /* FIXME: cagney/2001-02-01: The nasty (int) -> (long)
941 -> (void*) cast is to ensure that that the value of
942 cs->c_sclass can be correctly stored in a void
943 pointer in MSYMBOL_INFO. Better solutions
945 gdb_assert (sizeof (void *) >= sizeof (cs
->c_sclass
));
946 msym
= prim_record_minimal_symbol_and_info
947 (cs
->c_name
, tmpaddr
, ms_type
, (void *) (long) cs
->c_sclass
,
950 COFF_MAKE_MSYMBOL_SPECIAL (cs
->c_sclass
, msym
);
952 if (SDB_TYPE (cs
->c_type
))
955 sym
= process_coff_symbol
956 (cs
, &main_aux
, objfile
);
957 SYMBOL_VALUE (sym
) = tmpaddr
;
958 SYMBOL_SECTION (sym
) = sec
;
964 if (STREQ (cs
->c_name
, ".bf"))
968 /* value contains address of first non-init type code */
969 /* main_aux.x_sym.x_misc.x_lnsz.x_lnno
970 contains line number of '{' } */
972 complain (&bf_no_aux_complaint
, cs
->c_symnum
);
973 fcn_first_line
= main_aux
.x_sym
.x_misc
.x_lnsz
.x_lnno
;
974 fcn_first_line_addr
= cs
->c_value
;
976 /* Might want to check that locals are 0 and
977 context_stack_depth is zero, and complain if not. */
980 new = push_context (depth
, fcn_start_addr
);
981 fcn_cs_saved
.c_name
= getsymname (&fcn_sym_saved
);
983 process_coff_symbol (&fcn_cs_saved
, &fcn_aux_saved
, objfile
);
985 else if (STREQ (cs
->c_name
, ".ef"))
987 if (!within_function
)
988 error ("Bad coff function information\n");
989 /* the value of .ef is the address of epilogue code;
990 not useful for gdb. */
991 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
992 contains number of lines to '}' */
994 if (context_stack_depth
<= 0)
995 { /* We attempted to pop an empty context stack */
996 complain (&ef_stack_complaint
, cs
->c_symnum
);
1001 new = pop_context ();
1002 /* Stack must be empty now. */
1003 if (context_stack_depth
> 0 || new == NULL
)
1005 complain (&ef_complaint
, cs
->c_symnum
);
1006 within_function
= 0;
1009 if (cs
->c_naux
!= 1)
1011 complain (&ef_no_aux_complaint
, 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 fcn_first_line_addr
);
1028 enter_linenos (fcn_line_ptr
, fcn_first_line
, fcn_last_line
,
1031 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1033 #if defined (FUNCTION_EPILOGUE_SIZE)
1034 /* This macro should be defined only on
1036 fcn_aux_saved.x_sym.x_misc.x_fsize
1037 field is always zero.
1038 So use the .bf record information that
1039 points to the epilogue and add the size
1042 + FUNCTION_EPILOGUE_SIZE
1043 + ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)),
1045 fcn_cs_saved
.c_value
1046 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1047 + ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)),
1051 within_function
= 0;
1056 if (STREQ (cs
->c_name
, ".bb"))
1058 tmpaddr
= cs
->c_value
;
1059 tmpaddr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1060 push_context (++depth
, tmpaddr
);
1062 else if (STREQ (cs
->c_name
, ".eb"))
1064 if (context_stack_depth
<= 0)
1065 { /* We attempted to pop an empty context stack */
1066 complain (&eb_stack_complaint
, cs
->c_symnum
);
1070 new = pop_context ();
1071 if (depth
-- != new->depth
)
1073 complain (&eb_complaint
, symnum
);
1076 if (local_symbols
&& context_stack_depth
> 0)
1079 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1080 /* Make a block for the local symbols within. */
1081 finish_block (0, &local_symbols
, new->old_blocks
,
1082 new->start_addr
, tmpaddr
, objfile
);
1084 /* Now pop locals of block just finished. */
1085 local_symbols
= new->locals
;
1090 process_coff_symbol (cs
, &main_aux
, objfile
);
1095 if (last_source_file
)
1096 coff_end_symtab (objfile
);
1098 /* Patch up any opaque types (references to types that are not defined
1099 in the file where they are referenced, e.g. "struct foo *bar"). */
1100 ALL_OBJFILE_SYMTABS (objfile
, s
)
1101 patch_opaque_types (s
);
1103 current_objfile
= NULL
;
1106 /* Routines for reading headers and symbols from executable. */
1108 /* Read the next symbol, swap it, and return it in both internal_syment
1109 form, and coff_symbol form. Also return its first auxent, if any,
1110 in internal_auxent form, and skip any other auxents. */
1113 read_one_sym (register struct coff_symbol
*cs
,
1114 register struct internal_syment
*sym
,
1115 register union internal_auxent
*aux
)
1119 cs
->c_symnum
= symnum
;
1120 bfd_bread (temp_sym
, local_symesz
, nlist_bfd_global
);
1121 bfd_coff_swap_sym_in (symfile_bfd
, temp_sym
, (char *) sym
);
1122 cs
->c_naux
= sym
->n_numaux
& 0xff;
1123 if (cs
->c_naux
>= 1)
1125 bfd_bread (temp_aux
, local_auxesz
, nlist_bfd_global
);
1126 bfd_coff_swap_aux_in (symfile_bfd
, temp_aux
, sym
->n_type
, sym
->n_sclass
,
1127 0, cs
->c_naux
, (char *) aux
);
1128 /* If more than one aux entry, read past it (only the first aux
1130 for (i
= 1; i
< cs
->c_naux
; i
++)
1131 bfd_bread (temp_aux
, local_auxesz
, nlist_bfd_global
);
1133 cs
->c_name
= getsymname (sym
);
1134 cs
->c_value
= sym
->n_value
;
1135 cs
->c_sclass
= (sym
->n_sclass
& 0xff);
1136 cs
->c_secnum
= sym
->n_scnum
;
1137 cs
->c_type
= (unsigned) sym
->n_type
;
1138 if (!SDB_TYPE (cs
->c_type
))
1142 if (cs
->c_sclass
& 128)
1143 printf ("thumb symbol %s, class 0x%x\n", cs
->c_name
, cs
->c_sclass
);
1146 symnum
+= 1 + cs
->c_naux
;
1148 /* The PE file format stores symbol values as offsets within the
1149 section, rather than as absolute addresses. We correct that
1150 here, if the symbol has an appropriate storage class. FIXME: We
1151 should use BFD to read the symbols, rather than duplicating the
1155 switch (cs
->c_sclass
)
1159 case C_THUMBEXTFUNC
:
1164 case C_THUMBSTATFUNC
:
1170 if (cs
->c_secnum
!= 0)
1171 cs
->c_value
+= cs_section_address (cs
, symfile_bfd
);
1177 /* Support for string table handling */
1179 static char *stringtab
= NULL
;
1182 init_stringtab (bfd
*abfd
, long offset
)
1186 unsigned char lengthbuf
[4];
1190 /* If the file is stripped, the offset might be zero, indicating no
1191 string table. Just return with `stringtab' set to null. */
1195 if (bfd_seek (abfd
, offset
, 0) < 0)
1198 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1199 length
= bfd_h_get_32 (symfile_bfd
, lengthbuf
);
1201 /* If no string table is needed, then the file may end immediately
1202 after the symbols. Just return with `stringtab' set to null. */
1203 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1206 stringtab
= (char *) xmalloc (length
);
1207 /* This is in target format (probably not very useful, and not currently
1208 used), not host format. */
1209 memcpy (stringtab
, lengthbuf
, sizeof lengthbuf
);
1210 if (length
== sizeof length
) /* Empty table -- just the count */
1213 val
= bfd_bread (stringtab
+ sizeof lengthbuf
, length
- sizeof lengthbuf
,
1215 if (val
!= length
- sizeof lengthbuf
|| stringtab
[length
- 1] != '\0')
1222 free_stringtab (void)
1230 free_stringtab_cleanup (void *ignore
)
1236 getsymname (struct internal_syment
*symbol_entry
)
1238 static char buffer
[SYMNMLEN
+ 1];
1241 if (symbol_entry
->_n
._n_n
._n_zeroes
== 0)
1243 /* FIXME: Probably should be detecting corrupt symbol files by
1244 seeing whether offset points to within the stringtab. */
1245 result
= stringtab
+ symbol_entry
->_n
._n_n
._n_offset
;
1249 strncpy (buffer
, symbol_entry
->_n
._n_name
, SYMNMLEN
);
1250 buffer
[SYMNMLEN
] = '\0';
1256 /* Extract the file name from the aux entry of a C_FILE symbol. Return
1257 only the last component of the name. Result is in static storage and
1258 is only good for temporary use. */
1261 coff_getfilename (union internal_auxent
*aux_entry
)
1263 static char buffer
[BUFSIZ
];
1264 register char *temp
;
1267 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1268 strcpy (buffer
, stringtab
+ aux_entry
->x_file
.x_n
.x_offset
);
1271 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1272 buffer
[FILNMLEN
] = '\0';
1276 /* FIXME: We should not be throwing away the information about what
1277 directory. It should go into dirname of the symtab, or some such
1279 if ((temp
= strrchr (result
, '/')) != NULL
)
1284 /* Support for line number handling. */
1286 static char *linetab
= NULL
;
1287 static long linetab_offset
;
1288 static unsigned long linetab_size
;
1290 /* Read in all the line numbers for fast lookups later. Leave them in
1291 external (unswapped) format in memory; we'll swap them as we enter
1292 them into GDB's data structures. */
1295 init_lineno (bfd
*abfd
, long offset
, int size
)
1299 linetab_offset
= offset
;
1300 linetab_size
= size
;
1307 if (bfd_seek (abfd
, offset
, 0) < 0)
1310 /* Allocate the desired table, plus a sentinel */
1311 linetab
= (char *) xmalloc (size
+ local_linesz
);
1313 val
= bfd_bread (linetab
, size
, abfd
);
1317 /* Terminate it with an all-zero sentinel record */
1318 memset (linetab
+ size
, 0, local_linesz
);
1332 free_linetab_cleanup (void *ignore
)
1337 #if !defined (L_LNNO32)
1338 #define L_LNNO32(lp) ((lp)->l_lnno)
1342 enter_linenos (long file_offset
, register int first_line
,
1343 register int last_line
, struct objfile
*objfile
)
1345 register char *rawptr
;
1346 struct internal_lineno lptr
;
1350 if (file_offset
< linetab_offset
)
1352 complain (&lineno_complaint
, file_offset
);
1353 if (file_offset
> linetab_size
) /* Too big to be an offset? */
1355 file_offset
+= linetab_offset
; /* Try reading at that linetab offset */
1358 rawptr
= &linetab
[file_offset
- linetab_offset
];
1360 /* skip first line entry for each function */
1361 rawptr
+= local_linesz
;
1362 /* line numbers start at one for the first line of the function */
1367 bfd_coff_swap_lineno_in (symfile_bfd
, rawptr
, &lptr
);
1368 rawptr
+= local_linesz
;
1369 /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */
1370 if (L_LNNO32 (&lptr
) && L_LNNO32 (&lptr
) <= last_line
)
1371 record_line (current_subfile
, first_line
+ L_LNNO32 (&lptr
),
1373 + ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)));
1380 patch_type (struct type
*type
, struct type
*real_type
)
1382 register struct type
*target
= TYPE_TARGET_TYPE (type
);
1383 register struct type
*real_target
= TYPE_TARGET_TYPE (real_type
);
1384 int field_size
= TYPE_NFIELDS (real_target
) * sizeof (struct field
);
1386 TYPE_LENGTH (target
) = TYPE_LENGTH (real_target
);
1387 TYPE_NFIELDS (target
) = TYPE_NFIELDS (real_target
);
1388 TYPE_FIELDS (target
) = (struct field
*) TYPE_ALLOC (target
, field_size
);
1390 memcpy (TYPE_FIELDS (target
), TYPE_FIELDS (real_target
), field_size
);
1392 if (TYPE_NAME (real_target
))
1394 if (TYPE_NAME (target
))
1395 xfree (TYPE_NAME (target
));
1396 TYPE_NAME (target
) = concat (TYPE_NAME (real_target
), NULL
);
1400 /* Patch up all appropriate typedef symbols in the opaque_type_chains
1401 so that they can be used to print out opaque data structures properly. */
1404 patch_opaque_types (struct symtab
*s
)
1406 register struct block
*b
;
1408 register struct symbol
*real_sym
;
1410 /* Go through the per-file symbols only */
1411 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
1412 ALL_BLOCK_SYMBOLS (b
, i
, real_sym
)
1414 /* Find completed typedefs to use to fix opaque ones.
1415 Remove syms from the chain when their types are stored,
1416 but search the whole chain, as there may be several syms
1417 from different files with the same name. */
1418 if (SYMBOL_CLASS (real_sym
) == LOC_TYPEDEF
&&
1419 SYMBOL_NAMESPACE (real_sym
) == VAR_NAMESPACE
&&
1420 TYPE_CODE (SYMBOL_TYPE (real_sym
)) == TYPE_CODE_PTR
&&
1421 TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym
))) != 0)
1423 register char *name
= SYMBOL_NAME (real_sym
);
1424 register int hash
= hashname (name
);
1425 register struct symbol
*sym
, *prev
;
1428 for (sym
= opaque_type_chain
[hash
]; sym
;)
1430 if (name
[0] == SYMBOL_NAME (sym
)[0] &&
1431 STREQ (name
+ 1, SYMBOL_NAME (sym
) + 1))
1435 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
1439 opaque_type_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
1442 patch_type (SYMBOL_TYPE (sym
), SYMBOL_TYPE (real_sym
));
1446 sym
= SYMBOL_VALUE_CHAIN (prev
);
1450 sym
= opaque_type_chain
[hash
];
1456 sym
= SYMBOL_VALUE_CHAIN (sym
);
1463 static struct symbol
*
1464 process_coff_symbol (register struct coff_symbol
*cs
,
1465 register union internal_auxent
*aux
,
1466 struct objfile
*objfile
)
1468 register struct symbol
*sym
1469 = (struct symbol
*) obstack_alloc (&objfile
->symbol_obstack
,
1470 sizeof (struct symbol
));
1473 memset (sym
, 0, sizeof (struct symbol
));
1475 name
= EXTERNAL_NAME (name
, objfile
->obfd
);
1476 SYMBOL_NAME (sym
) = obsavestring (name
, strlen (name
),
1477 &objfile
->symbol_obstack
);
1478 SYMBOL_LANGUAGE (sym
) = language_auto
;
1479 SYMBOL_INIT_DEMANGLED_NAME (sym
, &objfile
->symbol_obstack
);
1481 /* default assumptions */
1482 SYMBOL_VALUE (sym
) = cs
->c_value
;
1483 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1484 SYMBOL_SECTION (sym
) = cs_to_section (cs
, objfile
);
1486 if (ISFCN (cs
->c_type
))
1488 SYMBOL_VALUE (sym
) += ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1490 lookup_function_type (decode_function_type (cs
, cs
->c_type
, aux
));
1492 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1493 if (cs
->c_sclass
== C_STAT
|| cs
->c_sclass
== C_THUMBSTAT
1494 || cs
->c_sclass
== C_THUMBSTATFUNC
)
1495 add_symbol_to_list (sym
, &file_symbols
);
1496 else if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
1497 || cs
->c_sclass
== C_THUMBEXTFUNC
)
1498 add_symbol_to_list (sym
, &global_symbols
);
1502 SYMBOL_TYPE (sym
) = decode_type (cs
, cs
->c_type
, aux
);
1503 switch (cs
->c_sclass
)
1509 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1510 add_symbol_to_list (sym
, &local_symbols
);
1514 case C_THUMBEXTFUNC
:
1516 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1517 SYMBOL_VALUE_ADDRESS (sym
) = (CORE_ADDR
) cs
->c_value
;
1518 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1519 add_symbol_to_list (sym
, &global_symbols
);
1523 case C_THUMBSTATFUNC
:
1525 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1526 SYMBOL_VALUE_ADDRESS (sym
) = (CORE_ADDR
) cs
->c_value
;
1527 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1528 if (within_function
)
1530 /* Static symbol of local scope */
1531 add_symbol_to_list (sym
, &local_symbols
);
1535 /* Static symbol at top level of file */
1536 add_symbol_to_list (sym
, &file_symbols
);
1540 #ifdef C_GLBLREG /* AMD coff */
1544 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1545 SYMBOL_VALUE (sym
) = SDB_REG_TO_REGNUM (cs
->c_value
);
1546 add_symbol_to_list (sym
, &local_symbols
);
1554 SYMBOL_CLASS (sym
) = LOC_ARG
;
1555 add_symbol_to_list (sym
, &local_symbols
);
1556 #if !defined (BELIEVE_PCC_PROMOTION)
1557 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
1559 /* If PCC says a parameter is a short or a char,
1560 aligned on an int boundary, realign it to the
1561 "little end" of the int. */
1562 struct type
*temptype
;
1563 temptype
= lookup_fundamental_type (current_objfile
,
1565 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) < TYPE_LENGTH (temptype
)
1566 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
1567 && 0 == SYMBOL_VALUE (sym
) % TYPE_LENGTH (temptype
))
1569 SYMBOL_VALUE (sym
) +=
1570 TYPE_LENGTH (temptype
)
1571 - TYPE_LENGTH (SYMBOL_TYPE (sym
));
1578 SYMBOL_CLASS (sym
) = LOC_REGPARM
;
1579 SYMBOL_VALUE (sym
) = SDB_REG_TO_REGNUM (cs
->c_value
);
1580 add_symbol_to_list (sym
, &local_symbols
);
1581 #if !defined (BELIEVE_PCC_PROMOTION)
1582 /* FIXME: This should retain the current type, since it's just
1583 a register value. gnu@adobe, 26Feb93 */
1585 /* If PCC says a parameter is a short or a char,
1586 it is really an int. */
1587 struct type
*temptype
;
1589 lookup_fundamental_type (current_objfile
, FT_INTEGER
);
1590 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) < TYPE_LENGTH (temptype
)
1591 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
1594 (TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
1595 ? lookup_fundamental_type (current_objfile
,
1596 FT_UNSIGNED_INTEGER
)
1604 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1605 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1607 /* If type has no name, give it one */
1608 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1610 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1611 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1613 /* If we are giving a name to a type such as "pointer to
1614 foo" or "function returning foo", we better not set
1615 the TYPE_NAME. If the program contains "typedef char
1616 *caddr_t;", we don't want all variables of type char
1617 * to print as caddr_t. This is not just a
1618 consequence of GDB's type management; CC and GCC (at
1619 least through version 2.4) both output variables of
1620 either type char * or caddr_t with the type
1621 refering to the C_TPDEF symbol for caddr_t. If a future
1622 compiler cleans this up it GDB is not ready for it
1623 yet, but if it becomes ready we somehow need to
1624 disable this check (without breaking the PCC/GCC2.4
1629 Fortunately, this check seems not to be necessary
1630 for anything except pointers or functions. */
1634 TYPE_NAME (SYMBOL_TYPE (sym
)) =
1635 concat (SYMBOL_NAME (sym
), NULL
);
1638 /* Ignore vendor section for Harris CX/UX targets. */
1639 else if (cs
->c_name
[0] == '$')
1641 #endif /* CXUX_TARGET */
1643 /* Keep track of any type which points to empty structured type,
1644 so it can be filled from a definition from another file. A
1645 simple forward reference (TYPE_CODE_UNDEF) is not an
1646 empty structured type, though; the forward references
1647 work themselves out via the magic of coff_lookup_type. */
1648 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
&&
1649 TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym
))) == 0 &&
1650 TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym
))) !=
1653 register int i
= hashname (SYMBOL_NAME (sym
));
1655 SYMBOL_VALUE_CHAIN (sym
) = opaque_type_chain
[i
];
1656 opaque_type_chain
[i
] = sym
;
1658 add_symbol_to_list (sym
, &file_symbols
);
1664 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1665 SYMBOL_NAMESPACE (sym
) = STRUCT_NAMESPACE
;
1667 /* Some compilers try to be helpful by inventing "fake"
1668 names for anonymous enums, structures, and unions, like
1669 "~0fake" or ".0fake". Thanks, but no thanks... */
1670 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1671 if (SYMBOL_NAME (sym
) != NULL
1672 && *SYMBOL_NAME (sym
) != '~'
1673 && *SYMBOL_NAME (sym
) != '.')
1674 TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) =
1675 concat (SYMBOL_NAME (sym
), NULL
);
1677 add_symbol_to_list (sym
, &file_symbols
);
1687 /* Decode a coff type specifier; return the type that is meant. */
1689 static struct type
*
1690 decode_type (register struct coff_symbol
*cs
, unsigned int c_type
,
1691 register union internal_auxent
*aux
)
1693 register struct type
*type
= 0;
1694 unsigned int new_c_type
;
1696 if (c_type
& ~N_BTMASK
)
1698 new_c_type
= DECREF (c_type
);
1701 type
= decode_type (cs
, new_c_type
, aux
);
1702 type
= lookup_pointer_type (type
);
1704 else if (ISFCN (c_type
))
1706 type
= decode_type (cs
, new_c_type
, aux
);
1707 type
= lookup_function_type (type
);
1709 else if (ISARY (c_type
))
1712 register unsigned short *dim
;
1713 struct type
*base_type
, *index_type
, *range_type
;
1715 /* Define an array type. */
1716 /* auxent refers to array, not base type */
1717 if (aux
->x_sym
.x_tagndx
.l
== 0)
1720 /* shift the indices down */
1721 dim
= &aux
->x_sym
.x_fcnary
.x_ary
.x_dimen
[0];
1724 for (i
= 0; *dim
&& i
< DIMNUM
- 1; i
++, dim
++)
1728 base_type
= decode_type (cs
, new_c_type
, aux
);
1729 index_type
= lookup_fundamental_type (current_objfile
, FT_INTEGER
);
1731 create_range_type ((struct type
*) NULL
, index_type
, 0, n
- 1);
1733 create_array_type ((struct type
*) NULL
, base_type
, range_type
);
1738 /* Reference to existing type. This only occurs with the
1739 struct, union, and enum types. EPI a29k coff
1740 fakes us out by producing aux entries with a nonzero
1741 x_tagndx for definitions of structs, unions, and enums, so we
1742 have to check the c_sclass field. SCO 3.2v4 cc gets confused
1743 with pointers to pointers to defined structs, and generates
1744 negative x_tagndx fields. */
1745 if (cs
->c_naux
> 0 && aux
->x_sym
.x_tagndx
.l
!= 0)
1747 if (cs
->c_sclass
!= C_STRTAG
1748 && cs
->c_sclass
!= C_UNTAG
1749 && cs
->c_sclass
!= C_ENTAG
1750 && aux
->x_sym
.x_tagndx
.l
>= 0)
1752 type
= coff_alloc_type (aux
->x_sym
.x_tagndx
.l
);
1757 complain (&tagndx_bad_complaint
, cs
->c_name
);
1758 /* And fall through to decode_base_type... */
1762 return decode_base_type (cs
, BTYPE (c_type
), aux
);
1765 /* Decode a coff type specifier for function definition;
1766 return the type that the function returns. */
1768 static struct type
*
1769 decode_function_type (register struct coff_symbol
*cs
, unsigned int c_type
,
1770 register union internal_auxent
*aux
)
1772 if (aux
->x_sym
.x_tagndx
.l
== 0)
1773 cs
->c_naux
= 0; /* auxent refers to function, not base type */
1775 return decode_type (cs
, DECREF (c_type
), aux
);
1780 static struct type
*
1781 decode_base_type (register struct coff_symbol
*cs
, unsigned int c_type
,
1782 register union internal_auxent
*aux
)
1789 /* shows up with "void (*foo)();" structure members */
1790 return lookup_fundamental_type (current_objfile
, FT_VOID
);
1793 /* DGUX actually defines both T_ARG and T_VOID to the same value. */
1796 /* Shows up in DGUX, I think. Not sure where. */
1797 return lookup_fundamental_type (current_objfile
, FT_VOID
); /* shouldn't show up here */
1803 /* Intel 960 COFF has this symbol and meaning. */
1804 return lookup_fundamental_type (current_objfile
, FT_VOID
);
1808 return lookup_fundamental_type (current_objfile
, FT_CHAR
);
1811 return lookup_fundamental_type (current_objfile
, FT_SHORT
);
1814 return lookup_fundamental_type (current_objfile
, FT_INTEGER
);
1817 if (cs
->c_sclass
== C_FIELD
1818 && aux
->x_sym
.x_misc
.x_lnsz
.x_size
> TARGET_LONG_BIT
)
1819 return lookup_fundamental_type (current_objfile
, FT_LONG_LONG
);
1821 return lookup_fundamental_type (current_objfile
, FT_LONG
);
1824 return lookup_fundamental_type (current_objfile
, FT_FLOAT
);
1827 return lookup_fundamental_type (current_objfile
, FT_DBL_PREC_FLOAT
);
1830 return lookup_fundamental_type (current_objfile
, FT_EXT_PREC_FLOAT
);
1833 if (cs
->c_naux
!= 1)
1835 /* anonymous structure type */
1836 type
= coff_alloc_type (cs
->c_symnum
);
1837 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
1838 TYPE_NAME (type
) = NULL
;
1839 /* This used to set the tag to "<opaque>". But I think setting it
1840 to NULL is right, and the printing code can print it as
1842 TYPE_TAG_NAME (type
) = NULL
;
1843 INIT_CPLUS_SPECIFIC (type
);
1844 TYPE_LENGTH (type
) = 0;
1845 TYPE_FIELDS (type
) = 0;
1846 TYPE_NFIELDS (type
) = 0;
1850 type
= coff_read_struct_type (cs
->c_symnum
,
1851 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1852 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
);
1857 if (cs
->c_naux
!= 1)
1859 /* anonymous union type */
1860 type
= coff_alloc_type (cs
->c_symnum
);
1861 TYPE_NAME (type
) = NULL
;
1862 /* This used to set the tag to "<opaque>". But I think setting it
1863 to NULL is right, and the printing code can print it as
1865 TYPE_TAG_NAME (type
) = NULL
;
1866 INIT_CPLUS_SPECIFIC (type
);
1867 TYPE_LENGTH (type
) = 0;
1868 TYPE_FIELDS (type
) = 0;
1869 TYPE_NFIELDS (type
) = 0;
1873 type
= coff_read_struct_type (cs
->c_symnum
,
1874 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1875 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
);
1877 TYPE_CODE (type
) = TYPE_CODE_UNION
;
1881 if (cs
->c_naux
!= 1)
1883 /* anonymous enum type */
1884 type
= coff_alloc_type (cs
->c_symnum
);
1885 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
1886 TYPE_NAME (type
) = NULL
;
1887 /* This used to set the tag to "<opaque>". But I think setting it
1888 to NULL is right, and the printing code can print it as
1890 TYPE_TAG_NAME (type
) = NULL
;
1891 TYPE_LENGTH (type
) = 0;
1892 TYPE_FIELDS (type
) = 0;
1893 TYPE_NFIELDS (type
) = 0;
1897 type
= coff_read_enum_type (cs
->c_symnum
,
1898 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1899 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
);
1904 /* shouldn't show up here */
1908 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_CHAR
);
1911 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_SHORT
);
1914 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_INTEGER
);
1917 if (cs
->c_sclass
== C_FIELD
1918 && aux
->x_sym
.x_misc
.x_lnsz
.x_size
> TARGET_LONG_BIT
)
1919 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_LONG_LONG
);
1921 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_LONG
);
1923 complain (&unexpected_type_complaint
, cs
->c_name
);
1924 return lookup_fundamental_type (current_objfile
, FT_VOID
);
1927 /* This page contains subroutines of read_type. */
1929 /* Read the description of a structure (or union type) and return an
1930 object describing the type. */
1932 static struct type
*
1933 coff_read_struct_type (int index
, int length
, int lastsym
)
1937 struct nextfield
*next
;
1941 register struct type
*type
;
1942 register struct nextfield
*list
= 0;
1943 struct nextfield
*new;
1947 struct coff_symbol member_sym
;
1948 register struct coff_symbol
*ms
= &member_sym
;
1949 struct internal_syment sub_sym
;
1950 union internal_auxent sub_aux
;
1953 type
= coff_alloc_type (index
);
1954 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
1955 INIT_CPLUS_SPECIFIC (type
);
1956 TYPE_LENGTH (type
) = length
;
1958 while (!done
&& symnum
< lastsym
&& symnum
< nlist_nsyms_global
)
1960 read_one_sym (ms
, &sub_sym
, &sub_aux
);
1962 name
= EXTERNAL_NAME (name
, current_objfile
->obfd
);
1964 switch (ms
->c_sclass
)
1969 /* Get space to record the next field's data. */
1970 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
1974 /* Save the data. */
1978 ¤t_objfile
->symbol_obstack
);
1979 FIELD_TYPE (list
->field
) = decode_type (ms
, ms
->c_type
, &sub_aux
);
1980 FIELD_BITPOS (list
->field
) = 8 * ms
->c_value
;
1981 FIELD_BITSIZE (list
->field
) = 0;
1987 /* Get space to record the next field's data. */
1988 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
1992 /* Save the data. */
1996 ¤t_objfile
->symbol_obstack
);
1997 FIELD_TYPE (list
->field
) = decode_type (ms
, ms
->c_type
, &sub_aux
);
1998 FIELD_BITPOS (list
->field
) = ms
->c_value
;
1999 FIELD_BITSIZE (list
->field
) = sub_aux
.x_sym
.x_misc
.x_lnsz
.x_size
;
2008 /* Now create the vector of fields, and record how big it is. */
2010 TYPE_NFIELDS (type
) = nfields
;
2011 TYPE_FIELDS (type
) = (struct field
*)
2012 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
2014 /* Copy the saved-up fields into the field vector. */
2016 for (n
= nfields
; list
; list
= list
->next
)
2017 TYPE_FIELD (type
, --n
) = list
->field
;
2022 /* Read a definition of an enumeration type,
2023 and create and return a suitable type object.
2024 Also defines the symbols that represent the values of the type. */
2027 static struct type
*
2028 coff_read_enum_type (int index
, int length
, int lastsym
)
2030 register struct symbol
*sym
;
2031 register struct type
*type
;
2034 struct pending
**symlist
;
2035 struct coff_symbol member_sym
;
2036 register struct coff_symbol
*ms
= &member_sym
;
2037 struct internal_syment sub_sym
;
2038 union internal_auxent sub_aux
;
2039 struct pending
*osyms
, *syms
;
2043 int unsigned_enum
= 1;
2045 type
= coff_alloc_type (index
);
2046 if (within_function
)
2047 symlist
= &local_symbols
;
2049 symlist
= &file_symbols
;
2051 o_nsyms
= osyms
? osyms
->nsyms
: 0;
2053 while (!done
&& symnum
< lastsym
&& symnum
< nlist_nsyms_global
)
2055 read_one_sym (ms
, &sub_sym
, &sub_aux
);
2057 name
= EXTERNAL_NAME (name
, current_objfile
->obfd
);
2059 switch (ms
->c_sclass
)
2062 sym
= (struct symbol
*) obstack_alloc
2063 (¤t_objfile
->symbol_obstack
,
2064 sizeof (struct symbol
));
2065 memset (sym
, 0, sizeof (struct symbol
));
2068 obsavestring (name
, strlen (name
),
2069 ¤t_objfile
->symbol_obstack
);
2070 SYMBOL_CLASS (sym
) = LOC_CONST
;
2071 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
2072 SYMBOL_VALUE (sym
) = ms
->c_value
;
2073 add_symbol_to_list (sym
, symlist
);
2078 /* Sometimes the linker (on 386/ix 2.0.2 at least) screws
2079 up the count of how many symbols to read. So stop
2086 /* Now fill in the fields of the type-structure. */
2089 TYPE_LENGTH (type
) = length
;
2091 TYPE_LENGTH (type
) = TARGET_INT_BIT
/ TARGET_CHAR_BIT
; /* Assume ints */
2092 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
2093 TYPE_NFIELDS (type
) = nsyms
;
2094 TYPE_FIELDS (type
) = (struct field
*)
2095 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
2097 /* Find the symbols for the values and put them into the type.
2098 The symbols can be found in the symlist that we put them on
2099 to cause them to be defined. osyms contains the old value
2100 of that symlist; everything up to there was defined by us. */
2101 /* Note that we preserve the order of the enum constants, so
2102 that in something like "enum {FOO, LAST_THING=FOO}" we print
2103 FOO, not LAST_THING. */
2105 for (syms
= *symlist
, n
= 0; syms
; syms
= syms
->next
)
2111 for (; j
< syms
->nsyms
; j
++, n
++)
2113 struct symbol
*xsym
= syms
->symbol
[j
];
2114 SYMBOL_TYPE (xsym
) = type
;
2115 TYPE_FIELD_NAME (type
, n
) = SYMBOL_NAME (xsym
);
2116 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (xsym
);
2117 if (SYMBOL_VALUE (xsym
) < 0)
2119 TYPE_FIELD_BITSIZE (type
, n
) = 0;
2126 TYPE_FLAGS (type
) |= TYPE_FLAG_UNSIGNED
;
2131 /* Register our ability to parse symbols for coff BFD files. */
2133 static struct sym_fns coff_sym_fns
=
2135 bfd_target_coff_flavour
,
2136 coff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2137 coff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2138 coff_symfile_read
, /* sym_read: read a symbol file into symtab */
2139 coff_symfile_finish
, /* sym_finish: finished with file, cleanup */
2140 default_symfile_offsets
, /* sym_offsets: xlate external to internal form */
2141 NULL
/* next: pointer to next struct sym_fns */
2145 _initialize_coffread (void)
2147 add_symtab_fns (&coff_sym_fns
);