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 patch_type (struct type
*, struct type
*);
197 static void enter_linenos (long, int, int, struct objfile
*);
199 static void free_linetab (void);
201 static void free_linetab_cleanup (void *ignore
);
203 static int init_lineno (bfd
*, long, int);
205 static char *getsymname (struct internal_syment
*);
207 static char *coff_getfilename (union internal_auxent
*);
209 static void free_stringtab (void);
211 static void free_stringtab_cleanup (void *ignore
);
213 static int init_stringtab (bfd
*, long);
215 static void read_one_sym (struct coff_symbol
*,
216 struct internal_syment
*, union internal_auxent
*);
218 static void coff_symtab_read (long, unsigned int, struct objfile
*);
220 static void find_linenos (bfd
*, sec_ptr
, PTR
);
222 static void coff_symfile_init (struct objfile
*);
224 static void coff_new_init (struct objfile
*);
226 static void coff_symfile_read (struct objfile
*, int);
228 static void coff_symfile_finish (struct objfile
*);
230 static void record_minimal_symbol (char *, CORE_ADDR
,
231 enum minimal_symbol_type
,
234 static void coff_end_symtab (struct objfile
*);
236 static void complete_symtab (char *, CORE_ADDR
, unsigned int);
238 static void coff_start_symtab (char *);
240 static struct type
*coff_alloc_type (int);
242 static struct type
**coff_lookup_type (int);
244 static void coff_locate_sections (bfd
*, asection
*, PTR
);
246 /* We are called once per section from coff_symfile_read. We
247 need to examine each section we are passed, check to see
248 if it is something we are interested in processing, and
249 if so, stash away some access information for the section.
251 FIXME: The section names should not be hardwired strings (what
252 should they be? I don't think most object file formats have enough
253 section flags to specify what kind of debug section it is
257 coff_locate_sections (bfd
*abfd
, asection
*sectp
, PTR csip
)
259 register struct coff_symfile_info
*csi
;
262 csi
= (struct coff_symfile_info
*) csip
;
263 name
= bfd_get_section_name (abfd
, sectp
);
264 if (STREQ (name
, ".text"))
266 csi
->textaddr
= bfd_section_vma (abfd
, sectp
);
267 csi
->textsize
+= bfd_section_size (abfd
, sectp
);
269 else if (strncmp (name
, ".text", sizeof ".text" - 1) == 0)
271 csi
->textsize
+= bfd_section_size (abfd
, sectp
);
273 else if (STREQ (name
, ".stabstr"))
275 csi
->stabstrsect
= sectp
;
277 else if (strncmp (name
, ".stab", sizeof ".stab" - 1) == 0)
281 /* We can have multiple .stab sections if linked with
283 for (s
= name
+ sizeof ".stab" - 1; *s
!= '\0'; s
++)
288 struct stab_section_list
*n
, **pn
;
290 n
= ((struct stab_section_list
*)
291 xmalloc (sizeof (struct stab_section_list
)));
294 for (pn
= &csi
->stabsects
; *pn
!= NULL
; pn
= &(*pn
)->next
)
298 /* This will be run after coffstab_build_psymtabs is called
299 in coff_symfile_read, at which point we no longer need
301 make_cleanup (xfree
, n
);
306 /* Return the section_offsets* that CS points to. */
307 static int cs_to_section (struct coff_symbol
*, struct objfile
*);
309 struct find_targ_sec_arg
315 static void find_targ_sec (bfd
*, asection
*, PTR
);
318 find_targ_sec (bfd
*abfd
, asection
*sect
, PTR obj
)
320 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
321 if (sect
->target_index
== args
->targ_index
)
322 *args
->resultp
= sect
;
325 /* Return the section number (SECT_OFF_*) that CS points to. */
327 cs_to_section (struct coff_symbol
*cs
, struct objfile
*objfile
)
329 asection
*sect
= NULL
;
330 struct find_targ_sec_arg args
;
331 int off
= SECT_OFF_TEXT (objfile
);
333 args
.targ_index
= cs
->c_secnum
;
334 args
.resultp
= §
;
335 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
338 /* This is the section. Figure out what SECT_OFF_* code it is. */
339 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
340 off
= SECT_OFF_TEXT (objfile
);
341 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
342 off
= SECT_OFF_DATA (objfile
);
344 /* Just return the bfd section index. */
350 /* Return the address of the section of a COFF symbol. */
352 static CORE_ADDR
cs_section_address (struct coff_symbol
*, bfd
*);
355 cs_section_address (struct coff_symbol
*cs
, bfd
*abfd
)
357 asection
*sect
= NULL
;
358 struct find_targ_sec_arg args
;
361 args
.targ_index
= cs
->c_secnum
;
362 args
.resultp
= §
;
363 bfd_map_over_sections (abfd
, find_targ_sec
, &args
);
365 addr
= bfd_get_section_vma (objfile
->obfd
, sect
);
369 /* Look up a coff type-number index. Return the address of the slot
370 where the type for that index is stored.
371 The type-number is in INDEX.
373 This can be used for finding the type associated with that index
374 or for associating a new type with the index. */
376 static struct type
**
377 coff_lookup_type (register int index
)
379 if (index
>= type_vector_length
)
381 int old_vector_length
= type_vector_length
;
383 type_vector_length
*= 2;
384 if (index
/* is still */ >= type_vector_length
)
385 type_vector_length
= index
* 2;
387 type_vector
= (struct type
**)
388 xrealloc ((char *) type_vector
,
389 type_vector_length
* sizeof (struct type
*));
390 memset (&type_vector
[old_vector_length
], 0,
391 (type_vector_length
- old_vector_length
) * sizeof (struct type
*));
393 return &type_vector
[index
];
396 /* Make sure there is a type allocated for type number index
397 and return the type object.
398 This can create an empty (zeroed) type object. */
401 coff_alloc_type (int index
)
403 register struct type
**type_addr
= coff_lookup_type (index
);
404 register struct type
*type
= *type_addr
;
406 /* If we are referring to a type not known at all yet,
407 allocate an empty type for it.
408 We will fill it in later if we find out how. */
411 type
= alloc_type (current_objfile
);
417 /* Start a new symtab for a new source file.
418 This is called when a COFF ".file" symbol is seen;
419 it indicates the start of data for one original source file. */
422 coff_start_symtab (char *name
)
425 /* We fill in the filename later. start_symtab puts
426 this pointer into last_source_file and we put it in
427 subfiles->name, which end_symtab frees; that's why
428 it must be malloc'd. */
429 savestring (name
, strlen (name
)),
430 /* We never know the directory name for COFF. */
432 /* The start address is irrelevant, since we set
433 last_source_start_addr in coff_end_symtab. */
435 record_debugformat ("COFF");
438 /* Save the vital information from when starting to read a file,
439 for use when closing off the current file.
440 NAME is the file name the symbols came from, START_ADDR is the first
441 text address for the file, and SIZE is the number of bytes of text. */
444 complete_symtab (char *name
, CORE_ADDR start_addr
, unsigned int size
)
446 if (last_source_file
!= NULL
)
447 xfree (last_source_file
);
448 last_source_file
= savestring (name
, strlen (name
));
449 current_source_start_addr
= start_addr
;
450 current_source_end_addr
= start_addr
+ size
;
452 if (current_objfile
->ei
.entry_point
>= current_source_start_addr
&&
453 current_objfile
->ei
.entry_point
< current_source_end_addr
)
455 current_objfile
->ei
.entry_file_lowpc
= current_source_start_addr
;
456 current_objfile
->ei
.entry_file_highpc
= current_source_end_addr
;
460 /* Finish the symbol definitions for one main source file,
461 close off all the lexical contexts for that file
462 (creating struct block's for them), then make the
463 struct symtab for that file and put it in the list of all such. */
466 coff_end_symtab (struct objfile
*objfile
)
468 struct symtab
*symtab
;
470 last_source_start_addr
= current_source_start_addr
;
472 symtab
= end_symtab (current_source_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
475 free_named_symtabs (symtab
->filename
);
477 /* Reinitialize for beginning of new file. */
478 last_source_file
= NULL
;
482 record_minimal_symbol (char *name
, CORE_ADDR address
,
483 enum minimal_symbol_type type
, struct objfile
*objfile
)
485 /* We don't want TDESC entry points in the minimal symbol table */
489 prim_record_minimal_symbol (name
, address
, type
, objfile
);
492 /* coff_symfile_init ()
493 is the coff-specific initialization routine for reading symbols.
494 It is passed a struct objfile which contains, among other things,
495 the BFD for the file whose symbols are being read, and a slot for
496 a pointer to "private data" which we fill with cookies and other
497 treats for coff_symfile_read ().
499 We will only be called if this is a COFF or COFF-like file.
500 BFD handles figuring out the format of the file, and code in symtab.c
501 uses BFD's determination to vector to us.
503 The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
506 coff_symfile_init (struct objfile
*objfile
)
508 /* Allocate struct to keep track of stab reading. */
509 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
510 xmmalloc (objfile
->md
, sizeof (struct dbx_symfile_info
));
512 memset ((PTR
) objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
514 /* Allocate struct to keep track of the symfile */
515 objfile
->sym_private
= xmmalloc (objfile
->md
,
516 sizeof (struct coff_symfile_info
));
518 memset (objfile
->sym_private
, 0, sizeof (struct coff_symfile_info
));
520 /* COFF objects may be reordered, so set OBJF_REORDERED. If we
521 find this causes a significant slowdown in gdb then we could
522 set it in the debug symbol readers only when necessary. */
523 objfile
->flags
|= OBJF_REORDERED
;
525 init_entry_point_info (objfile
);
528 /* This function is called for every section; it finds the outer limits
529 of the line table (minimum and maximum file offset) so that the
530 mainline code can read the whole thing for efficiency. */
534 find_linenos (bfd
*abfd
, sec_ptr asect
, PTR vpinfo
)
536 struct coff_symfile_info
*info
;
538 file_ptr offset
, maxoff
;
540 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
541 count
= asect
->lineno_count
;
546 size
= count
* local_linesz
;
548 info
= (struct coff_symfile_info
*) vpinfo
;
549 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
550 offset
= asect
->line_filepos
;
553 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
554 info
->min_lineno_offset
= offset
;
556 maxoff
= offset
+ size
;
557 if (maxoff
> info
->max_lineno_offset
)
558 info
->max_lineno_offset
= maxoff
;
562 /* The BFD for this file -- only good while we're actively reading
563 symbols into a psymtab or a symtab. */
565 static bfd
*symfile_bfd
;
567 /* Read a symbol file, after initialization by coff_symfile_init. */
571 coff_symfile_read (struct objfile
*objfile
, int mainline
)
573 struct coff_symfile_info
*info
;
574 struct dbx_symfile_info
*dbxinfo
;
575 bfd
*abfd
= objfile
->obfd
;
576 coff_data_type
*cdata
= coff_data (abfd
);
577 char *name
= bfd_get_filename (abfd
);
579 unsigned int num_symbols
;
581 int stringtab_offset
;
582 struct cleanup
*back_to
;
587 info
= (struct coff_symfile_info
*) objfile
->sym_private
;
588 dbxinfo
= objfile
->sym_stab_info
;
589 symfile_bfd
= abfd
; /* Kludge for swap routines */
591 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
592 num_symbols
= bfd_get_symcount (abfd
); /* How many syms */
593 symtab_offset
= cdata
->sym_filepos
; /* Symbol table file offset */
594 stringtab_offset
= symtab_offset
+ /* String table file offset */
595 num_symbols
* cdata
->local_symesz
;
597 /* Set a few file-statics that give us specific information about
598 the particular COFF file format we're reading. */
599 local_n_btmask
= cdata
->local_n_btmask
;
600 local_n_btshft
= cdata
->local_n_btshft
;
601 local_n_tmask
= cdata
->local_n_tmask
;
602 local_n_tshift
= cdata
->local_n_tshift
;
603 local_linesz
= cdata
->local_linesz
;
604 local_symesz
= cdata
->local_symesz
;
605 local_auxesz
= cdata
->local_auxesz
;
607 /* Allocate space for raw symbol and aux entries, based on their
608 space requirements as reported by BFD. */
609 temp_sym
= (char *) xmalloc
610 (cdata
->local_symesz
+ cdata
->local_auxesz
);
611 temp_aux
= temp_sym
+ cdata
->local_symesz
;
612 back_to
= make_cleanup (free_current_contents
, &temp_sym
);
614 /* We need to know whether this is a PE file, because in PE files,
615 unlike standard COFF files, symbol values are stored as offsets
616 from the section address, rather than as absolute addresses.
617 FIXME: We should use BFD to read the symbol table, and thus avoid
620 strncmp (bfd_get_target (objfile
->obfd
), "pe", 2) == 0
621 || strncmp (bfd_get_target (objfile
->obfd
), "epoc-pe", 7) == 0;
625 /* Read the line number table, all at once. */
626 info
->min_lineno_offset
= 0;
627 info
->max_lineno_offset
= 0;
628 bfd_map_over_sections (abfd
, find_linenos
, (PTR
) info
);
630 make_cleanup (free_linetab_cleanup
, 0 /*ignore*/);
631 val
= init_lineno (abfd
, info
->min_lineno_offset
,
632 info
->max_lineno_offset
- info
->min_lineno_offset
);
634 error ("\"%s\": error reading line numbers\n", name
);
636 /* Now read the string table, all at once. */
638 make_cleanup (free_stringtab_cleanup
, 0 /*ignore*/);
639 val
= init_stringtab (abfd
, stringtab_offset
);
641 error ("\"%s\": can't get string table", name
);
643 init_minimal_symbol_collection ();
644 make_cleanup_discard_minimal_symbols ();
646 /* Now that the executable file is positioned at symbol table,
647 process it and define symbols accordingly. */
649 coff_symtab_read ((long) symtab_offset
, num_symbols
, objfile
);
651 /* Sort symbols alphabetically within each block. */
656 for (s
= objfile
->symtabs
; s
!= NULL
; s
= s
->next
)
657 sort_symtab_syms (s
);
660 /* Install any minimal symbols that have been collected as the current
661 minimal symbols for this objfile. */
663 install_minimal_symbols (objfile
);
665 bfd_map_over_sections (abfd
, coff_locate_sections
, (PTR
) info
);
669 if (!info
->stabstrsect
)
671 error (("The debugging information in `%s' is corrupted.\n"
672 "The file has a `.stabs' section, but no `.stabstr' "
677 /* FIXME: dubious. Why can't we use something normal like
678 bfd_get_section_contents? */
679 bfd_seek (abfd
, abfd
->where
, 0);
681 stabstrsize
= bfd_section_size (abfd
, info
->stabstrsect
);
683 coffstab_build_psymtabs (objfile
,
685 info
->textaddr
, info
->textsize
,
687 info
->stabstrsect
->filepos
, stabstrsize
);
689 if (dwarf2_has_info (abfd
))
691 /* DWARF2 sections. */
692 dwarf2_build_psymtabs (objfile
, mainline
);
695 do_cleanups (back_to
);
699 coff_new_init (struct objfile
*ignore
)
703 /* Perform any local cleanups required when we are done with a particular
704 objfile. I.E, we are in the process of discarding all symbol information
705 for an objfile, freeing up all memory held for it, and unlinking the
706 objfile struct from the global list of known objfiles. */
709 coff_symfile_finish (struct objfile
*objfile
)
711 if (objfile
->sym_private
!= NULL
)
713 xmfree (objfile
->md
, objfile
->sym_private
);
716 /* Let stabs reader clean up */
717 stabsread_clear_cache ();
721 /* Given pointers to a symbol table in coff style exec file,
722 analyze them and create struct symtab's describing the symbols.
723 NSYMS is the number of symbols in the symbol table.
724 We read them one at a time using read_one_sym (). */
727 coff_symtab_read (long symtab_offset
, unsigned int nsyms
,
728 struct objfile
*objfile
)
730 register struct context_stack
*new;
731 struct coff_symbol coff_symbol
;
732 register struct coff_symbol
*cs
= &coff_symbol
;
733 static struct internal_syment main_sym
;
734 static union internal_auxent main_aux
;
735 struct coff_symbol fcn_cs_saved
;
736 static struct internal_syment fcn_sym_saved
;
737 static union internal_auxent fcn_aux_saved
;
739 /* A .file is open. */
740 int in_source_file
= 0;
741 int next_file_symnum
= -1;
742 /* Name of the current file. */
743 char *filestring
= "";
745 int fcn_first_line
= 0;
746 CORE_ADDR fcn_first_line_addr
= 0;
747 int fcn_last_line
= 0;
748 int fcn_start_addr
= 0;
749 long fcn_line_ptr
= 0;
753 /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous....
754 it's hard to know I've really worked around it. The fix should be
755 harmless, anyway). The symptom of the bug is that the first
756 fread (in read_one_sym), will (in my example) actually get data
757 from file offset 268, when the fseek was to 264 (and ftell shows
758 264). This causes all hell to break loose. I was unable to
759 reproduce this on a short test program which operated on the same
760 file, performing (I think) the same sequence of operations.
762 It stopped happening when I put in this (former) rewind().
764 FIXME: Find out if this has been reported to Sun, whether it has
765 been fixed in a later release, etc. */
767 bfd_seek (objfile
->obfd
, 0, 0);
769 /* Position to read the symbol table. */
770 val
= bfd_seek (objfile
->obfd
, (long) symtab_offset
, 0);
772 perror_with_name (objfile
->name
);
774 current_objfile
= objfile
;
775 nlist_bfd_global
= objfile
->obfd
;
776 nlist_nsyms_global
= nsyms
;
777 last_source_file
= NULL
;
778 memset (opaque_type_chain
, 0, sizeof opaque_type_chain
);
780 if (type_vector
) /* Get rid of previous one */
782 type_vector_length
= 160;
783 type_vector
= (struct type
**)
784 xmalloc (type_vector_length
* sizeof (struct type
*));
785 memset (type_vector
, 0, type_vector_length
* sizeof (struct type
*));
787 coff_start_symtab ("");
790 while (symnum
< nsyms
)
792 QUIT
; /* Make this command interruptable. */
794 read_one_sym (cs
, &main_sym
, &main_aux
);
796 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
798 if (last_source_file
)
799 coff_end_symtab (objfile
);
801 coff_start_symtab ("_globals_");
802 complete_symtab ("_globals_", 0, 0);
803 /* done with all files, everything from here on out is globals */
806 /* Special case for file with type declarations only, no text. */
807 if (!last_source_file
&& SDB_TYPE (cs
->c_type
)
808 && cs
->c_secnum
== N_DEBUG
)
809 complete_symtab (filestring
, 0, 0);
811 /* Typedefs should not be treated as symbol definitions. */
812 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
814 /* Record all functions -- external and static -- in minsyms. */
815 tmpaddr
= cs
->c_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
816 record_minimal_symbol (cs
->c_name
, tmpaddr
, mst_text
, objfile
);
818 fcn_line_ptr
= main_aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
819 fcn_start_addr
= tmpaddr
;
821 fcn_sym_saved
= main_sym
;
822 fcn_aux_saved
= main_aux
;
826 switch (cs
->c_sclass
)
835 complain (&bad_sclass_complaint
, cs
->c_name
);
839 /* c_value field contains symnum of next .file entry in table
840 or symnum of first global after last .file. */
841 next_file_symnum
= cs
->c_value
;
843 filestring
= coff_getfilename (&main_aux
);
847 /* Complete symbol table for last object file
848 containing debugging information. */
849 if (last_source_file
)
851 coff_end_symtab (objfile
);
852 coff_start_symtab (filestring
);
857 /* C_LABEL is used for labels and static functions. Including
858 it here allows gdb to see static functions when no debug
859 info is available. */
861 /* However, labels within a function can make weird backtraces,
862 so filter them out (from phdm@macqel.be). */
868 case C_THUMBSTATFUNC
:
869 if (cs
->c_name
[0] == '.')
871 if (STREQ (cs
->c_name
, ".text"))
873 /* FIXME: don't wire in ".text" as section name
875 /* Check for in_source_file deals with case of
876 a file with debugging symbols
877 followed by a later file with no symbols. */
879 complete_symtab (filestring
,
880 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)),
881 main_aux
.x_scn
.x_scnlen
);
884 /* flush rest of '.' symbols */
887 else if (!SDB_TYPE (cs
->c_type
)
888 && cs
->c_name
[0] == 'L'
889 && (strncmp (cs
->c_name
, "LI%", 3) == 0
890 || strncmp (cs
->c_name
, "LF%", 3) == 0
891 || strncmp (cs
->c_name
, "LC%", 3) == 0
892 || strncmp (cs
->c_name
, "LP%", 3) == 0
893 || strncmp (cs
->c_name
, "LPB%", 4) == 0
894 || strncmp (cs
->c_name
, "LBB%", 4) == 0
895 || strncmp (cs
->c_name
, "LBE%", 4) == 0
896 || strncmp (cs
->c_name
, "LPBX%", 5) == 0))
897 /* At least on a 3b1, gcc generates swbeg and string labels
898 that look like this. Ignore them. */
900 /* fall in for static symbols that don't start with '.' */
905 /* Record it in the minimal symbols regardless of
906 SDB_TYPE. This parallels what we do for other debug
907 formats, and probably is needed to make
908 print_address_symbolic work right without the (now
909 gone) "set fast-symbolic-addr off" kludge. */
911 /* FIXME: should use mst_abs, and not relocate, if absolute. */
912 enum minimal_symbol_type ms_type
;
915 if (cs
->c_secnum
== N_UNDEF
)
917 /* This is a common symbol. See if the target
918 environment knows where it has been relocated to. */
920 if (target_lookup_symbol (cs
->c_name
, &reladdr
))
922 /* Error in lookup; ignore symbol. */
926 /* The address has already been relocated; make sure that
927 objfile_relocate doesn't relocate it again. */
929 ms_type
= cs
->c_sclass
== C_EXT
930 || cs
->c_sclass
== C_THUMBEXT
?
931 mst_bss
: mst_file_bss
;
935 sec
= cs_to_section (cs
, objfile
);
936 tmpaddr
= cs
->c_value
;
937 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXTFUNC
938 || cs
->c_sclass
== C_THUMBEXT
)
939 tmpaddr
+= ANOFFSET (objfile
->section_offsets
, sec
);
941 if (sec
== SECT_OFF_TEXT (objfile
))
944 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXTFUNC
945 || cs
->c_sclass
== C_THUMBEXT
?
946 mst_text
: mst_file_text
;
947 tmpaddr
= SMASH_TEXT_ADDRESS (tmpaddr
);
949 else if (sec
== SECT_OFF_DATA (objfile
))
952 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
?
953 mst_data
: mst_file_data
;
955 else if (sec
== SECT_OFF_BSS (objfile
))
958 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
?
959 mst_data
: mst_file_data
;
962 ms_type
= mst_unknown
;
965 if (cs
->c_name
[0] != '@' /* Skip tdesc symbols */ )
967 struct minimal_symbol
*msym
;
969 /* FIXME: cagney/2001-02-01: The nasty (int) -> (long)
970 -> (void*) cast is to ensure that that the value of
971 cs->c_sclass can be correctly stored in a void
972 pointer in MSYMBOL_INFO. Better solutions
974 gdb_assert (sizeof (void *) >= sizeof (cs
->c_sclass
));
975 msym
= prim_record_minimal_symbol_and_info
976 (cs
->c_name
, tmpaddr
, ms_type
, (void *) (long) cs
->c_sclass
,
979 COFF_MAKE_MSYMBOL_SPECIAL (cs
->c_sclass
, msym
);
981 if (SDB_TYPE (cs
->c_type
))
984 sym
= process_coff_symbol
985 (cs
, &main_aux
, objfile
);
986 SYMBOL_VALUE (sym
) = tmpaddr
;
987 SYMBOL_SECTION (sym
) = sec
;
993 if (STREQ (cs
->c_name
, ".bf"))
997 /* value contains address of first non-init type code */
998 /* main_aux.x_sym.x_misc.x_lnsz.x_lnno
999 contains line number of '{' } */
1000 if (cs
->c_naux
!= 1)
1001 complain (&bf_no_aux_complaint
, cs
->c_symnum
);
1002 fcn_first_line
= main_aux
.x_sym
.x_misc
.x_lnsz
.x_lnno
;
1003 fcn_first_line_addr
= cs
->c_value
;
1005 /* Might want to check that locals are 0 and
1006 context_stack_depth is zero, and complain if not. */
1009 new = push_context (depth
, fcn_start_addr
);
1010 fcn_cs_saved
.c_name
= getsymname (&fcn_sym_saved
);
1012 process_coff_symbol (&fcn_cs_saved
, &fcn_aux_saved
, objfile
);
1014 else if (STREQ (cs
->c_name
, ".ef"))
1016 if (!within_function
)
1017 error ("Bad coff function information\n");
1018 /* the value of .ef is the address of epilogue code;
1019 not useful for gdb. */
1020 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1021 contains number of lines to '}' */
1023 if (context_stack_depth
<= 0)
1024 { /* We attempted to pop an empty context stack */
1025 complain (&ef_stack_complaint
, cs
->c_symnum
);
1026 within_function
= 0;
1030 new = pop_context ();
1031 /* Stack must be empty now. */
1032 if (context_stack_depth
> 0 || new == NULL
)
1034 complain (&ef_complaint
, cs
->c_symnum
);
1035 within_function
= 0;
1038 if (cs
->c_naux
!= 1)
1040 complain (&ef_no_aux_complaint
, cs
->c_symnum
);
1041 fcn_last_line
= 0x7FFFFFFF;
1045 fcn_last_line
= main_aux
.x_sym
.x_misc
.x_lnsz
.x_lnno
;
1047 /* fcn_first_line is the line number of the opening '{'.
1048 Do not record it - because it would affect gdb's idea
1049 of the line number of the first statement of the function -
1050 except for one-line functions, for which it is also the line
1051 number of all the statements and of the closing '}', and
1052 for which we do not have any other statement-line-number. */
1053 if (fcn_last_line
== 1)
1054 record_line (current_subfile
, fcn_first_line
,
1055 fcn_first_line_addr
);
1057 enter_linenos (fcn_line_ptr
, fcn_first_line
, fcn_last_line
,
1060 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1062 #if defined (FUNCTION_EPILOGUE_SIZE)
1063 /* This macro should be defined only on
1065 fcn_aux_saved.x_sym.x_misc.x_fsize
1066 field is always zero.
1067 So use the .bf record information that
1068 points to the epilogue and add the size
1071 + FUNCTION_EPILOGUE_SIZE
1072 + ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)),
1074 fcn_cs_saved
.c_value
1075 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1076 + ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)),
1080 within_function
= 0;
1085 if (STREQ (cs
->c_name
, ".bb"))
1087 tmpaddr
= cs
->c_value
;
1088 tmpaddr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1089 push_context (++depth
, tmpaddr
);
1091 else if (STREQ (cs
->c_name
, ".eb"))
1093 if (context_stack_depth
<= 0)
1094 { /* We attempted to pop an empty context stack */
1095 complain (&eb_stack_complaint
, cs
->c_symnum
);
1099 new = pop_context ();
1100 if (depth
-- != new->depth
)
1102 complain (&eb_complaint
, symnum
);
1105 if (local_symbols
&& context_stack_depth
> 0)
1108 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1109 /* Make a block for the local symbols within. */
1110 finish_block (0, &local_symbols
, new->old_blocks
,
1111 new->start_addr
, tmpaddr
, objfile
);
1113 /* Now pop locals of block just finished. */
1114 local_symbols
= new->locals
;
1119 process_coff_symbol (cs
, &main_aux
, objfile
);
1124 if (last_source_file
)
1125 coff_end_symtab (objfile
);
1127 /* Patch up any opaque types (references to types that are not defined
1128 in the file where they are referenced, e.g. "struct foo *bar"). */
1129 ALL_OBJFILE_SYMTABS (objfile
, s
)
1130 patch_opaque_types (s
);
1132 current_objfile
= NULL
;
1135 /* Routines for reading headers and symbols from executable. */
1137 /* Read the next symbol, swap it, and return it in both internal_syment
1138 form, and coff_symbol form. Also return its first auxent, if any,
1139 in internal_auxent form, and skip any other auxents. */
1142 read_one_sym (register struct coff_symbol
*cs
,
1143 register struct internal_syment
*sym
,
1144 register union internal_auxent
*aux
)
1148 cs
->c_symnum
= symnum
;
1149 bfd_bread (temp_sym
, local_symesz
, nlist_bfd_global
);
1150 bfd_coff_swap_sym_in (symfile_bfd
, temp_sym
, (char *) sym
);
1151 cs
->c_naux
= sym
->n_numaux
& 0xff;
1152 if (cs
->c_naux
>= 1)
1154 bfd_bread (temp_aux
, local_auxesz
, nlist_bfd_global
);
1155 bfd_coff_swap_aux_in (symfile_bfd
, temp_aux
, sym
->n_type
, sym
->n_sclass
,
1156 0, cs
->c_naux
, (char *) aux
);
1157 /* If more than one aux entry, read past it (only the first aux
1159 for (i
= 1; i
< cs
->c_naux
; i
++)
1160 bfd_bread (temp_aux
, local_auxesz
, nlist_bfd_global
);
1162 cs
->c_name
= getsymname (sym
);
1163 cs
->c_value
= sym
->n_value
;
1164 cs
->c_sclass
= (sym
->n_sclass
& 0xff);
1165 cs
->c_secnum
= sym
->n_scnum
;
1166 cs
->c_type
= (unsigned) sym
->n_type
;
1167 if (!SDB_TYPE (cs
->c_type
))
1171 if (cs
->c_sclass
& 128)
1172 printf ("thumb symbol %s, class 0x%x\n", cs
->c_name
, cs
->c_sclass
);
1175 symnum
+= 1 + cs
->c_naux
;
1177 /* The PE file format stores symbol values as offsets within the
1178 section, rather than as absolute addresses. We correct that
1179 here, if the symbol has an appropriate storage class. FIXME: We
1180 should use BFD to read the symbols, rather than duplicating the
1184 switch (cs
->c_sclass
)
1188 case C_THUMBEXTFUNC
:
1193 case C_THUMBSTATFUNC
:
1199 if (cs
->c_secnum
!= 0)
1200 cs
->c_value
+= cs_section_address (cs
, symfile_bfd
);
1206 /* Support for string table handling */
1208 static char *stringtab
= NULL
;
1211 init_stringtab (bfd
*abfd
, long offset
)
1215 unsigned char lengthbuf
[4];
1219 /* If the file is stripped, the offset might be zero, indicating no
1220 string table. Just return with `stringtab' set to null. */
1224 if (bfd_seek (abfd
, offset
, 0) < 0)
1227 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1228 length
= bfd_h_get_32 (symfile_bfd
, lengthbuf
);
1230 /* If no string table is needed, then the file may end immediately
1231 after the symbols. Just return with `stringtab' set to null. */
1232 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1235 stringtab
= (char *) xmalloc (length
);
1236 /* This is in target format (probably not very useful, and not currently
1237 used), not host format. */
1238 memcpy (stringtab
, lengthbuf
, sizeof lengthbuf
);
1239 if (length
== sizeof length
) /* Empty table -- just the count */
1242 val
= bfd_bread (stringtab
+ sizeof lengthbuf
, length
- sizeof lengthbuf
,
1244 if (val
!= length
- sizeof lengthbuf
|| stringtab
[length
- 1] != '\0')
1251 free_stringtab (void)
1259 free_stringtab_cleanup (void *ignore
)
1265 getsymname (struct internal_syment
*symbol_entry
)
1267 static char buffer
[SYMNMLEN
+ 1];
1270 if (symbol_entry
->_n
._n_n
._n_zeroes
== 0)
1272 /* FIXME: Probably should be detecting corrupt symbol files by
1273 seeing whether offset points to within the stringtab. */
1274 result
= stringtab
+ symbol_entry
->_n
._n_n
._n_offset
;
1278 strncpy (buffer
, symbol_entry
->_n
._n_name
, SYMNMLEN
);
1279 buffer
[SYMNMLEN
] = '\0';
1285 /* Extract the file name from the aux entry of a C_FILE symbol. Return
1286 only the last component of the name. Result is in static storage and
1287 is only good for temporary use. */
1290 coff_getfilename (union internal_auxent
*aux_entry
)
1292 static char buffer
[BUFSIZ
];
1293 register char *temp
;
1296 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1297 strcpy (buffer
, stringtab
+ aux_entry
->x_file
.x_n
.x_offset
);
1300 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1301 buffer
[FILNMLEN
] = '\0';
1305 /* FIXME: We should not be throwing away the information about what
1306 directory. It should go into dirname of the symtab, or some such
1308 if ((temp
= strrchr (result
, '/')) != NULL
)
1313 /* Support for line number handling. */
1315 static char *linetab
= NULL
;
1316 static long linetab_offset
;
1317 static unsigned long linetab_size
;
1319 /* Read in all the line numbers for fast lookups later. Leave them in
1320 external (unswapped) format in memory; we'll swap them as we enter
1321 them into GDB's data structures. */
1324 init_lineno (bfd
*abfd
, long offset
, int size
)
1328 linetab_offset
= offset
;
1329 linetab_size
= size
;
1336 if (bfd_seek (abfd
, offset
, 0) < 0)
1339 /* Allocate the desired table, plus a sentinel */
1340 linetab
= (char *) xmalloc (size
+ local_linesz
);
1342 val
= bfd_bread (linetab
, size
, abfd
);
1346 /* Terminate it with an all-zero sentinel record */
1347 memset (linetab
+ size
, 0, local_linesz
);
1361 free_linetab_cleanup (void *ignore
)
1366 #if !defined (L_LNNO32)
1367 #define L_LNNO32(lp) ((lp)->l_lnno)
1371 enter_linenos (long file_offset
, register int first_line
,
1372 register int last_line
, struct objfile
*objfile
)
1374 register char *rawptr
;
1375 struct internal_lineno lptr
;
1379 if (file_offset
< linetab_offset
)
1381 complain (&lineno_complaint
, file_offset
);
1382 if (file_offset
> linetab_size
) /* Too big to be an offset? */
1384 file_offset
+= linetab_offset
; /* Try reading at that linetab offset */
1387 rawptr
= &linetab
[file_offset
- linetab_offset
];
1389 /* skip first line entry for each function */
1390 rawptr
+= local_linesz
;
1391 /* line numbers start at one for the first line of the function */
1396 bfd_coff_swap_lineno_in (symfile_bfd
, rawptr
, &lptr
);
1397 rawptr
+= local_linesz
;
1398 /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */
1399 if (L_LNNO32 (&lptr
) && L_LNNO32 (&lptr
) <= last_line
)
1400 record_line (current_subfile
, first_line
+ L_LNNO32 (&lptr
),
1402 + ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
)));
1409 patch_type (struct type
*type
, struct type
*real_type
)
1411 register struct type
*target
= TYPE_TARGET_TYPE (type
);
1412 register struct type
*real_target
= TYPE_TARGET_TYPE (real_type
);
1413 int field_size
= TYPE_NFIELDS (real_target
) * sizeof (struct field
);
1415 TYPE_LENGTH (target
) = TYPE_LENGTH (real_target
);
1416 TYPE_NFIELDS (target
) = TYPE_NFIELDS (real_target
);
1417 TYPE_FIELDS (target
) = (struct field
*) TYPE_ALLOC (target
, field_size
);
1419 memcpy (TYPE_FIELDS (target
), TYPE_FIELDS (real_target
), field_size
);
1421 if (TYPE_NAME (real_target
))
1423 if (TYPE_NAME (target
))
1424 xfree (TYPE_NAME (target
));
1425 TYPE_NAME (target
) = concat (TYPE_NAME (real_target
), NULL
);
1429 /* Patch up all appropriate typedef symbols in the opaque_type_chains
1430 so that they can be used to print out opaque data structures properly. */
1433 patch_opaque_types (struct symtab
*s
)
1435 register struct block
*b
;
1437 register struct symbol
*real_sym
;
1439 /* Go through the per-file symbols only */
1440 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
1441 for (i
= BLOCK_NSYMS (b
) - 1; i
>= 0; i
--)
1443 /* Find completed typedefs to use to fix opaque ones.
1444 Remove syms from the chain when their types are stored,
1445 but search the whole chain, as there may be several syms
1446 from different files with the same name. */
1447 real_sym
= BLOCK_SYM (b
, i
);
1448 if (SYMBOL_CLASS (real_sym
) == LOC_TYPEDEF
&&
1449 SYMBOL_NAMESPACE (real_sym
) == VAR_NAMESPACE
&&
1450 TYPE_CODE (SYMBOL_TYPE (real_sym
)) == TYPE_CODE_PTR
&&
1451 TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym
))) != 0)
1453 register char *name
= SYMBOL_NAME (real_sym
);
1454 register int hash
= hashname (name
);
1455 register struct symbol
*sym
, *prev
;
1458 for (sym
= opaque_type_chain
[hash
]; sym
;)
1460 if (name
[0] == SYMBOL_NAME (sym
)[0] &&
1461 STREQ (name
+ 1, SYMBOL_NAME (sym
) + 1))
1465 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
1469 opaque_type_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
1472 patch_type (SYMBOL_TYPE (sym
), SYMBOL_TYPE (real_sym
));
1476 sym
= SYMBOL_VALUE_CHAIN (prev
);
1480 sym
= opaque_type_chain
[hash
];
1486 sym
= SYMBOL_VALUE_CHAIN (sym
);
1493 static struct symbol
*
1494 process_coff_symbol (register struct coff_symbol
*cs
,
1495 register union internal_auxent
*aux
,
1496 struct objfile
*objfile
)
1498 register struct symbol
*sym
1499 = (struct symbol
*) obstack_alloc (&objfile
->symbol_obstack
,
1500 sizeof (struct symbol
));
1503 memset (sym
, 0, sizeof (struct symbol
));
1505 name
= EXTERNAL_NAME (name
, objfile
->obfd
);
1506 SYMBOL_NAME (sym
) = obsavestring (name
, strlen (name
),
1507 &objfile
->symbol_obstack
);
1508 SYMBOL_LANGUAGE (sym
) = language_auto
;
1509 SYMBOL_INIT_DEMANGLED_NAME (sym
, &objfile
->symbol_obstack
);
1511 /* default assumptions */
1512 SYMBOL_VALUE (sym
) = cs
->c_value
;
1513 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1514 SYMBOL_SECTION (sym
) = cs_to_section (cs
, objfile
);
1516 if (ISFCN (cs
->c_type
))
1518 SYMBOL_VALUE (sym
) += ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1520 lookup_function_type (decode_function_type (cs
, cs
->c_type
, aux
));
1522 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1523 if (cs
->c_sclass
== C_STAT
|| cs
->c_sclass
== C_THUMBSTAT
1524 || cs
->c_sclass
== C_THUMBSTATFUNC
)
1525 add_symbol_to_list (sym
, &file_symbols
);
1526 else if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
1527 || cs
->c_sclass
== C_THUMBEXTFUNC
)
1528 add_symbol_to_list (sym
, &global_symbols
);
1532 SYMBOL_TYPE (sym
) = decode_type (cs
, cs
->c_type
, aux
);
1533 switch (cs
->c_sclass
)
1539 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1540 add_symbol_to_list (sym
, &local_symbols
);
1544 case C_THUMBEXTFUNC
:
1546 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1547 SYMBOL_VALUE_ADDRESS (sym
) = (CORE_ADDR
) cs
->c_value
;
1548 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1549 add_symbol_to_list (sym
, &global_symbols
);
1553 case C_THUMBSTATFUNC
:
1555 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1556 SYMBOL_VALUE_ADDRESS (sym
) = (CORE_ADDR
) cs
->c_value
;
1557 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1558 if (within_function
)
1560 /* Static symbol of local scope */
1561 add_symbol_to_list (sym
, &local_symbols
);
1565 /* Static symbol at top level of file */
1566 add_symbol_to_list (sym
, &file_symbols
);
1570 #ifdef C_GLBLREG /* AMD coff */
1574 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1575 SYMBOL_VALUE (sym
) = SDB_REG_TO_REGNUM (cs
->c_value
);
1576 add_symbol_to_list (sym
, &local_symbols
);
1584 SYMBOL_CLASS (sym
) = LOC_ARG
;
1585 add_symbol_to_list (sym
, &local_symbols
);
1586 #if !defined (BELIEVE_PCC_PROMOTION)
1587 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
1589 /* If PCC says a parameter is a short or a char,
1590 aligned on an int boundary, realign it to the
1591 "little end" of the int. */
1592 struct type
*temptype
;
1593 temptype
= lookup_fundamental_type (current_objfile
,
1595 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) < TYPE_LENGTH (temptype
)
1596 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
1597 && 0 == SYMBOL_VALUE (sym
) % TYPE_LENGTH (temptype
))
1599 SYMBOL_VALUE (sym
) +=
1600 TYPE_LENGTH (temptype
)
1601 - TYPE_LENGTH (SYMBOL_TYPE (sym
));
1608 SYMBOL_CLASS (sym
) = LOC_REGPARM
;
1609 SYMBOL_VALUE (sym
) = SDB_REG_TO_REGNUM (cs
->c_value
);
1610 add_symbol_to_list (sym
, &local_symbols
);
1611 #if !defined (BELIEVE_PCC_PROMOTION)
1612 /* FIXME: This should retain the current type, since it's just
1613 a register value. gnu@adobe, 26Feb93 */
1615 /* If PCC says a parameter is a short or a char,
1616 it is really an int. */
1617 struct type
*temptype
;
1619 lookup_fundamental_type (current_objfile
, FT_INTEGER
);
1620 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) < TYPE_LENGTH (temptype
)
1621 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
1624 (TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
1625 ? lookup_fundamental_type (current_objfile
,
1626 FT_UNSIGNED_INTEGER
)
1634 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1635 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1637 /* If type has no name, give it one */
1638 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1640 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1641 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1643 /* If we are giving a name to a type such as "pointer to
1644 foo" or "function returning foo", we better not set
1645 the TYPE_NAME. If the program contains "typedef char
1646 *caddr_t;", we don't want all variables of type char
1647 * to print as caddr_t. This is not just a
1648 consequence of GDB's type management; CC and GCC (at
1649 least through version 2.4) both output variables of
1650 either type char * or caddr_t with the type
1651 refering to the C_TPDEF symbol for caddr_t. If a future
1652 compiler cleans this up it GDB is not ready for it
1653 yet, but if it becomes ready we somehow need to
1654 disable this check (without breaking the PCC/GCC2.4
1659 Fortunately, this check seems not to be necessary
1660 for anything except pointers or functions. */
1664 TYPE_NAME (SYMBOL_TYPE (sym
)) =
1665 concat (SYMBOL_NAME (sym
), NULL
);
1668 /* Ignore vendor section for Harris CX/UX targets. */
1669 else if (cs
->c_name
[0] == '$')
1671 #endif /* CXUX_TARGET */
1673 /* Keep track of any type which points to empty structured type,
1674 so it can be filled from a definition from another file. A
1675 simple forward reference (TYPE_CODE_UNDEF) is not an
1676 empty structured type, though; the forward references
1677 work themselves out via the magic of coff_lookup_type. */
1678 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
&&
1679 TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym
))) == 0 &&
1680 TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym
))) !=
1683 register int i
= hashname (SYMBOL_NAME (sym
));
1685 SYMBOL_VALUE_CHAIN (sym
) = opaque_type_chain
[i
];
1686 opaque_type_chain
[i
] = sym
;
1688 add_symbol_to_list (sym
, &file_symbols
);
1694 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1695 SYMBOL_NAMESPACE (sym
) = STRUCT_NAMESPACE
;
1697 /* Some compilers try to be helpful by inventing "fake"
1698 names for anonymous enums, structures, and unions, like
1699 "~0fake" or ".0fake". Thanks, but no thanks... */
1700 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1701 if (SYMBOL_NAME (sym
) != NULL
1702 && *SYMBOL_NAME (sym
) != '~'
1703 && *SYMBOL_NAME (sym
) != '.')
1704 TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) =
1705 concat (SYMBOL_NAME (sym
), NULL
);
1707 add_symbol_to_list (sym
, &file_symbols
);
1717 /* Decode a coff type specifier; return the type that is meant. */
1719 static struct type
*
1720 decode_type (register struct coff_symbol
*cs
, unsigned int c_type
,
1721 register union internal_auxent
*aux
)
1723 register struct type
*type
= 0;
1724 unsigned int new_c_type
;
1726 if (c_type
& ~N_BTMASK
)
1728 new_c_type
= DECREF (c_type
);
1731 type
= decode_type (cs
, new_c_type
, aux
);
1732 type
= lookup_pointer_type (type
);
1734 else if (ISFCN (c_type
))
1736 type
= decode_type (cs
, new_c_type
, aux
);
1737 type
= lookup_function_type (type
);
1739 else if (ISARY (c_type
))
1742 register unsigned short *dim
;
1743 struct type
*base_type
, *index_type
, *range_type
;
1745 /* Define an array type. */
1746 /* auxent refers to array, not base type */
1747 if (aux
->x_sym
.x_tagndx
.l
== 0)
1750 /* shift the indices down */
1751 dim
= &aux
->x_sym
.x_fcnary
.x_ary
.x_dimen
[0];
1754 for (i
= 0; *dim
&& i
< DIMNUM
- 1; i
++, dim
++)
1758 base_type
= decode_type (cs
, new_c_type
, aux
);
1759 index_type
= lookup_fundamental_type (current_objfile
, FT_INTEGER
);
1761 create_range_type ((struct type
*) NULL
, index_type
, 0, n
- 1);
1763 create_array_type ((struct type
*) NULL
, base_type
, range_type
);
1768 /* Reference to existing type. This only occurs with the
1769 struct, union, and enum types. EPI a29k coff
1770 fakes us out by producing aux entries with a nonzero
1771 x_tagndx for definitions of structs, unions, and enums, so we
1772 have to check the c_sclass field. SCO 3.2v4 cc gets confused
1773 with pointers to pointers to defined structs, and generates
1774 negative x_tagndx fields. */
1775 if (cs
->c_naux
> 0 && aux
->x_sym
.x_tagndx
.l
!= 0)
1777 if (cs
->c_sclass
!= C_STRTAG
1778 && cs
->c_sclass
!= C_UNTAG
1779 && cs
->c_sclass
!= C_ENTAG
1780 && aux
->x_sym
.x_tagndx
.l
>= 0)
1782 type
= coff_alloc_type (aux
->x_sym
.x_tagndx
.l
);
1787 complain (&tagndx_bad_complaint
, cs
->c_name
);
1788 /* And fall through to decode_base_type... */
1792 return decode_base_type (cs
, BTYPE (c_type
), aux
);
1795 /* Decode a coff type specifier for function definition;
1796 return the type that the function returns. */
1798 static struct type
*
1799 decode_function_type (register struct coff_symbol
*cs
, unsigned int c_type
,
1800 register union internal_auxent
*aux
)
1802 if (aux
->x_sym
.x_tagndx
.l
== 0)
1803 cs
->c_naux
= 0; /* auxent refers to function, not base type */
1805 return decode_type (cs
, DECREF (c_type
), aux
);
1810 static struct type
*
1811 decode_base_type (register struct coff_symbol
*cs
, unsigned int c_type
,
1812 register union internal_auxent
*aux
)
1819 /* shows up with "void (*foo)();" structure members */
1820 return lookup_fundamental_type (current_objfile
, FT_VOID
);
1823 /* DGUX actually defines both T_ARG and T_VOID to the same value. */
1826 /* Shows up in DGUX, I think. Not sure where. */
1827 return lookup_fundamental_type (current_objfile
, FT_VOID
); /* shouldn't show up here */
1833 /* Intel 960 COFF has this symbol and meaning. */
1834 return lookup_fundamental_type (current_objfile
, FT_VOID
);
1838 return lookup_fundamental_type (current_objfile
, FT_CHAR
);
1841 return lookup_fundamental_type (current_objfile
, FT_SHORT
);
1844 return lookup_fundamental_type (current_objfile
, FT_INTEGER
);
1847 if (cs
->c_sclass
== C_FIELD
1848 && aux
->x_sym
.x_misc
.x_lnsz
.x_size
> TARGET_LONG_BIT
)
1849 return lookup_fundamental_type (current_objfile
, FT_LONG_LONG
);
1851 return lookup_fundamental_type (current_objfile
, FT_LONG
);
1854 return lookup_fundamental_type (current_objfile
, FT_FLOAT
);
1857 return lookup_fundamental_type (current_objfile
, FT_DBL_PREC_FLOAT
);
1860 return lookup_fundamental_type (current_objfile
, FT_EXT_PREC_FLOAT
);
1863 if (cs
->c_naux
!= 1)
1865 /* anonymous structure type */
1866 type
= coff_alloc_type (cs
->c_symnum
);
1867 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
1868 TYPE_NAME (type
) = NULL
;
1869 /* This used to set the tag to "<opaque>". But I think setting it
1870 to NULL is right, and the printing code can print it as
1872 TYPE_TAG_NAME (type
) = NULL
;
1873 INIT_CPLUS_SPECIFIC (type
);
1874 TYPE_LENGTH (type
) = 0;
1875 TYPE_FIELDS (type
) = 0;
1876 TYPE_NFIELDS (type
) = 0;
1880 type
= coff_read_struct_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
);
1887 if (cs
->c_naux
!= 1)
1889 /* anonymous union type */
1890 type
= coff_alloc_type (cs
->c_symnum
);
1891 TYPE_NAME (type
) = NULL
;
1892 /* This used to set the tag to "<opaque>". But I think setting it
1893 to NULL is right, and the printing code can print it as
1895 TYPE_TAG_NAME (type
) = NULL
;
1896 INIT_CPLUS_SPECIFIC (type
);
1897 TYPE_LENGTH (type
) = 0;
1898 TYPE_FIELDS (type
) = 0;
1899 TYPE_NFIELDS (type
) = 0;
1903 type
= coff_read_struct_type (cs
->c_symnum
,
1904 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1905 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
);
1907 TYPE_CODE (type
) = TYPE_CODE_UNION
;
1911 if (cs
->c_naux
!= 1)
1913 /* anonymous enum type */
1914 type
= coff_alloc_type (cs
->c_symnum
);
1915 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
1916 TYPE_NAME (type
) = NULL
;
1917 /* This used to set the tag to "<opaque>". But I think setting it
1918 to NULL is right, and the printing code can print it as
1920 TYPE_TAG_NAME (type
) = NULL
;
1921 TYPE_LENGTH (type
) = 0;
1922 TYPE_FIELDS (type
) = 0;
1923 TYPE_NFIELDS (type
) = 0;
1927 type
= coff_read_enum_type (cs
->c_symnum
,
1928 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1929 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
);
1934 /* shouldn't show up here */
1938 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_CHAR
);
1941 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_SHORT
);
1944 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_INTEGER
);
1947 if (cs
->c_sclass
== C_FIELD
1948 && aux
->x_sym
.x_misc
.x_lnsz
.x_size
> TARGET_LONG_BIT
)
1949 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_LONG_LONG
);
1951 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_LONG
);
1953 complain (&unexpected_type_complaint
, cs
->c_name
);
1954 return lookup_fundamental_type (current_objfile
, FT_VOID
);
1957 /* This page contains subroutines of read_type. */
1959 /* Read the description of a structure (or union type) and return an
1960 object describing the type. */
1962 static struct type
*
1963 coff_read_struct_type (int index
, int length
, int lastsym
)
1967 struct nextfield
*next
;
1971 register struct type
*type
;
1972 register struct nextfield
*list
= 0;
1973 struct nextfield
*new;
1977 struct coff_symbol member_sym
;
1978 register struct coff_symbol
*ms
= &member_sym
;
1979 struct internal_syment sub_sym
;
1980 union internal_auxent sub_aux
;
1983 type
= coff_alloc_type (index
);
1984 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
1985 INIT_CPLUS_SPECIFIC (type
);
1986 TYPE_LENGTH (type
) = length
;
1988 while (!done
&& symnum
< lastsym
&& symnum
< nlist_nsyms_global
)
1990 read_one_sym (ms
, &sub_sym
, &sub_aux
);
1992 name
= EXTERNAL_NAME (name
, current_objfile
->obfd
);
1994 switch (ms
->c_sclass
)
1999 /* Get space to record the next field's data. */
2000 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
2004 /* Save the data. */
2008 ¤t_objfile
->symbol_obstack
);
2009 FIELD_TYPE (list
->field
) = decode_type (ms
, ms
->c_type
, &sub_aux
);
2010 FIELD_BITPOS (list
->field
) = 8 * ms
->c_value
;
2011 FIELD_BITSIZE (list
->field
) = 0;
2017 /* Get space to record the next field's data. */
2018 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
2022 /* Save the data. */
2026 ¤t_objfile
->symbol_obstack
);
2027 FIELD_TYPE (list
->field
) = decode_type (ms
, ms
->c_type
, &sub_aux
);
2028 FIELD_BITPOS (list
->field
) = ms
->c_value
;
2029 FIELD_BITSIZE (list
->field
) = sub_aux
.x_sym
.x_misc
.x_lnsz
.x_size
;
2038 /* Now create the vector of fields, and record how big it is. */
2040 TYPE_NFIELDS (type
) = nfields
;
2041 TYPE_FIELDS (type
) = (struct field
*)
2042 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
2044 /* Copy the saved-up fields into the field vector. */
2046 for (n
= nfields
; list
; list
= list
->next
)
2047 TYPE_FIELD (type
, --n
) = list
->field
;
2052 /* Read a definition of an enumeration type,
2053 and create and return a suitable type object.
2054 Also defines the symbols that represent the values of the type. */
2057 static struct type
*
2058 coff_read_enum_type (int index
, int length
, int lastsym
)
2060 register struct symbol
*sym
;
2061 register struct type
*type
;
2064 struct pending
**symlist
;
2065 struct coff_symbol member_sym
;
2066 register struct coff_symbol
*ms
= &member_sym
;
2067 struct internal_syment sub_sym
;
2068 union internal_auxent sub_aux
;
2069 struct pending
*osyms
, *syms
;
2073 int unsigned_enum
= 1;
2075 type
= coff_alloc_type (index
);
2076 if (within_function
)
2077 symlist
= &local_symbols
;
2079 symlist
= &file_symbols
;
2081 o_nsyms
= osyms
? osyms
->nsyms
: 0;
2083 while (!done
&& symnum
< lastsym
&& symnum
< nlist_nsyms_global
)
2085 read_one_sym (ms
, &sub_sym
, &sub_aux
);
2087 name
= EXTERNAL_NAME (name
, current_objfile
->obfd
);
2089 switch (ms
->c_sclass
)
2092 sym
= (struct symbol
*) obstack_alloc
2093 (¤t_objfile
->symbol_obstack
,
2094 sizeof (struct symbol
));
2095 memset (sym
, 0, sizeof (struct symbol
));
2098 obsavestring (name
, strlen (name
),
2099 ¤t_objfile
->symbol_obstack
);
2100 SYMBOL_CLASS (sym
) = LOC_CONST
;
2101 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
2102 SYMBOL_VALUE (sym
) = ms
->c_value
;
2103 add_symbol_to_list (sym
, symlist
);
2108 /* Sometimes the linker (on 386/ix 2.0.2 at least) screws
2109 up the count of how many symbols to read. So stop
2116 /* Now fill in the fields of the type-structure. */
2119 TYPE_LENGTH (type
) = length
;
2121 TYPE_LENGTH (type
) = TARGET_INT_BIT
/ TARGET_CHAR_BIT
; /* Assume ints */
2122 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
2123 TYPE_NFIELDS (type
) = nsyms
;
2124 TYPE_FIELDS (type
) = (struct field
*)
2125 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
2127 /* Find the symbols for the values and put them into the type.
2128 The symbols can be found in the symlist that we put them on
2129 to cause them to be defined. osyms contains the old value
2130 of that symlist; everything up to there was defined by us. */
2131 /* Note that we preserve the order of the enum constants, so
2132 that in something like "enum {FOO, LAST_THING=FOO}" we print
2133 FOO, not LAST_THING. */
2135 for (syms
= *symlist
, n
= 0; syms
; syms
= syms
->next
)
2141 for (; j
< syms
->nsyms
; j
++, n
++)
2143 struct symbol
*xsym
= syms
->symbol
[j
];
2144 SYMBOL_TYPE (xsym
) = type
;
2145 TYPE_FIELD_NAME (type
, n
) = SYMBOL_NAME (xsym
);
2146 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (xsym
);
2147 if (SYMBOL_VALUE (xsym
) < 0)
2149 TYPE_FIELD_BITSIZE (type
, n
) = 0;
2156 TYPE_FLAGS (type
) |= TYPE_FLAG_UNSIGNED
;
2161 /* Register our ability to parse symbols for coff BFD files. */
2163 static struct sym_fns coff_sym_fns
=
2165 bfd_target_coff_flavour
,
2166 coff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2167 coff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2168 coff_symfile_read
, /* sym_read: read a symbol file into symtab */
2169 coff_symfile_finish
, /* sym_finish: finished with file, cleanup */
2170 default_symfile_offsets
, /* sym_offsets: xlate external to internal form */
2171 NULL
/* next: pointer to next struct sym_fns */
2175 _initialize_coffread (void)
2177 add_symtab_fns (&coff_sym_fns
);