1 /* Read coff symbol tables and convert to internal format, for GDB.
2 Copyright 1987, 88, 89, 90, 91, 92, 93, 94, 96, 97, 1998
3 Free Software Foundation, Inc.
4 Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu).
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 #include "breakpoint.h"
31 #include "gdb_string.h"
34 #include "coff/internal.h" /* Internal format of COFF symbols in BFD */
35 #include "libcoff.h" /* FIXME secret internal data from BFD */
40 #include "gdb-stabs.h"
41 #include "stabsread.h"
42 #include "complaints.h"
45 struct coff_symfile_info
{
46 file_ptr min_lineno_offset
; /* Where in file lowest line#s are */
47 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file */
49 CORE_ADDR textaddr
; /* Addr of .text section. */
50 unsigned int textsize
; /* Size of .text section. */
51 struct stab_section_list
*stabsects
; /* .stab sections. */
52 asection
*stabstrsect
; /* Section pointer for .stab section */
56 /* Translate an external name string into a user-visible name. */
57 #define EXTERNAL_NAME(string, abfd) \
58 (string[0] == bfd_get_symbol_leading_char(abfd)? string+1: string)
60 /* To be an sdb debug type, type must have at least a basic or primary
61 derived type. Using this rather than checking against T_NULL is
62 said to prevent core dumps if we try to operate on Michael Bloom
65 #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK))
67 /* Convert from an sdb register number to an internal gdb register number.
68 This should be defined in tm.h, if REGISTER_NAMES is not set up
69 to map one to one onto the sdb register numbers. */
71 #ifndef SDB_REG_TO_REGNUM
72 # define SDB_REG_TO_REGNUM(value) (value)
75 /* Core address of start and end of text of current source file.
76 This comes from a ".text" symbol where x_nlinno > 0. */
78 static CORE_ADDR current_source_start_addr
;
79 static CORE_ADDR current_source_end_addr
;
81 /* The addresses of the symbol table stream and number of symbols
82 of the object file we are reading (as copied into core). */
84 static bfd
*nlist_bfd_global
;
85 static int nlist_nsyms_global
;
88 /* Pointers to scratch storage, used for reading raw symbols and auxents. */
90 static char *temp_sym
;
91 static char *temp_aux
;
93 /* Local variables that hold the shift and mask values for the
94 COFF file that we are currently reading. These come back to us
95 from BFD, and are referenced by their macro names, as well as
96 internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
97 macros from include/coff/internal.h . */
99 static unsigned local_n_btmask
;
100 static unsigned local_n_btshft
;
101 static unsigned local_n_tmask
;
102 static unsigned local_n_tshift
;
104 #define N_BTMASK local_n_btmask
105 #define N_BTSHFT local_n_btshft
106 #define N_TMASK local_n_tmask
107 #define N_TSHIFT local_n_tshift
109 /* Local variables that hold the sizes in the file of various COFF structures.
110 (We only need to know this to read them from the file -- BFD will then
111 translate the data in them, into `internal_xxx' structs in the right
112 byte order, alignment, etc.) */
114 static unsigned local_linesz
;
115 static unsigned local_symesz
;
116 static unsigned local_auxesz
;
118 /* This is set if this is a PE format file. */
122 /* Chain of typedefs of pointers to empty struct/union types.
123 They are chained thru the SYMBOL_VALUE_CHAIN. */
125 static struct symbol
*opaque_type_chain
[HASHSIZE
];
127 /* Complaints about various problems in the file being read */
129 struct complaint ef_complaint
=
130 {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0};
132 struct complaint ef_stack_complaint
=
133 {"`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d", 0, 0};
135 struct complaint eb_stack_complaint
=
136 {"`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d", 0, 0};
138 struct complaint bf_no_aux_complaint
=
139 {"`.bf' symbol %d has no aux entry", 0, 0};
141 struct complaint ef_no_aux_complaint
=
142 {"`.ef' symbol %d has no aux entry", 0, 0};
144 struct complaint lineno_complaint
=
145 {"Line number pointer %d lower than start of line numbers", 0, 0};
147 struct complaint unexpected_type_complaint
=
148 {"Unexpected type for symbol %s", 0, 0};
150 struct complaint bad_sclass_complaint
=
151 {"Bad n_sclass for symbol %s", 0, 0};
153 struct complaint misordered_blocks_complaint
=
154 {"Blocks out of order at address %x", 0, 0};
156 struct complaint tagndx_bad_complaint
=
157 {"Symbol table entry for %s has bad tagndx value", 0, 0};
159 struct complaint eb_complaint
=
160 {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0};
162 /* Simplified internal version of coff symbol table information */
166 int c_symnum
; /* symbol number of this entry */
167 int c_naux
; /* 0 if syment only, 1 if syment + auxent, etc */
174 static struct type
*coff_read_struct_type
PARAMS ((int, int, int));
176 static struct type
*decode_base_type
PARAMS ((struct coff_symbol
*,
178 union internal_auxent
*));
180 static struct type
*decode_type
PARAMS ((struct coff_symbol
*, unsigned int,
181 union internal_auxent
*));
183 static struct type
*decode_function_type
PARAMS ((struct coff_symbol
*,
185 union internal_auxent
*));
187 static struct type
*coff_read_enum_type
PARAMS ((int, int, int));
189 static struct symbol
*process_coff_symbol
PARAMS ((struct coff_symbol
*,
190 union internal_auxent
*,
191 struct section_offsets
*,
194 static void patch_opaque_types
PARAMS ((struct symtab
*));
196 static void patch_type
PARAMS ((struct type
*, struct type
*));
198 static void enter_linenos
PARAMS ((long, int, int, struct section_offsets
*));
200 static void free_linetab
PARAMS ((void));
202 static int init_lineno
PARAMS ((bfd
*, long, int));
204 static char *getsymname
PARAMS ((struct internal_syment
*));
206 static char *coff_getfilename
PARAMS ((union internal_auxent
*));
208 static void free_stringtab
PARAMS ((void));
210 static int init_stringtab
PARAMS ((bfd
*, long));
212 static void read_one_sym
PARAMS ((struct coff_symbol
*,
213 struct internal_syment
*,
214 union internal_auxent
*));
216 static void coff_symtab_read
PARAMS ((long, int, struct section_offsets
*,
219 static void find_linenos
PARAMS ((bfd
*, sec_ptr
, PTR
));
221 static void coff_symfile_init
PARAMS ((struct objfile
*));
223 static void coff_new_init
PARAMS ((struct objfile
*));
225 static void coff_symfile_read
PARAMS ((struct objfile
*,
226 struct section_offsets
*, int));
228 static void coff_symfile_finish
PARAMS ((struct objfile
*));
230 static void record_minimal_symbol
PARAMS ((char *, CORE_ADDR
,
231 enum minimal_symbol_type
,
234 static void coff_end_symtab
PARAMS ((struct objfile
*));
236 static void complete_symtab
PARAMS ((char *, CORE_ADDR
, unsigned int));
238 static void coff_start_symtab
PARAMS ((char *));
240 static struct type
*coff_alloc_type
PARAMS ((int));
242 static struct type
**coff_lookup_type
PARAMS ((int));
244 static void coff_locate_sections
PARAMS ((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 (abfd
, sectp
, csip
)
262 register struct coff_symfile_info
*csi
;
265 csi
= (struct coff_symfile_info
*) csip
;
266 name
= bfd_get_section_name (abfd
, sectp
);
267 if (STREQ (name
, ".text"))
269 csi
->textaddr
= bfd_section_vma (abfd
, sectp
);
270 csi
->textsize
+= bfd_section_size (abfd
, sectp
);
272 else if (strncmp (name
, ".text", sizeof ".text" - 1) == 0)
274 csi
->textsize
+= bfd_section_size (abfd
, sectp
);
276 else if (STREQ (name
, ".stabstr"))
278 csi
->stabstrsect
= sectp
;
280 else if (strncmp (name
, ".stab", sizeof ".stab" - 1) == 0)
284 /* We can have multiple .stab sections if linked with
286 for (s
= name
+ sizeof ".stab" - 1; *s
!= '\0'; s
++)
291 struct stab_section_list
*n
, **pn
;
293 n
= ((struct stab_section_list
*)
294 xmalloc (sizeof (struct stab_section_list
)));
297 for (pn
= &csi
->stabsects
; *pn
!= NULL
; pn
= &(*pn
)->next
)
301 /* This will be run after coffstab_build_psymtabs is called
302 in coff_symfile_read, at which point we no longer need
304 make_cleanup (free
, n
);
309 /* Return the section_offsets* that CS points to. */
310 static int cs_to_section
PARAMS ((struct coff_symbol
*, struct objfile
*));
312 struct find_targ_sec_arg
{
317 static void find_targ_sec
PARAMS ((bfd
*, asection
*, void *));
319 static void find_targ_sec (abfd
, sect
, obj
)
324 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*)obj
;
325 if (sect
->target_index
== args
->targ_index
)
326 *args
->resultp
= sect
;
329 /* Return the section number (SECT_OFF_*) that CS points to. */
331 cs_to_section (cs
, objfile
)
332 struct coff_symbol
*cs
;
333 struct objfile
*objfile
;
335 asection
*sect
= NULL
;
336 struct find_targ_sec_arg args
;
337 int off
= SECT_OFF_TEXT
;
339 args
.targ_index
= cs
->c_secnum
;
340 args
.resultp
= §
;
341 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
344 /* This is the section. Figure out what SECT_OFF_* code it is. */
345 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
347 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
355 /* Return the address of the section of a COFF symbol. */
357 static CORE_ADDR cs_section_address
PARAMS ((struct coff_symbol
*, bfd
*));
360 cs_section_address (cs
, abfd
)
361 struct coff_symbol
*cs
;
364 asection
*sect
= NULL
;
365 struct find_targ_sec_arg args
;
368 args
.targ_index
= cs
->c_secnum
;
369 args
.resultp
= §
;
370 bfd_map_over_sections (abfd
, find_targ_sec
, &args
);
372 addr
= bfd_get_section_vma (objfile
->obfd
, sect
);
376 /* Look up a coff type-number index. Return the address of the slot
377 where the type for that index is stored.
378 The type-number is in INDEX.
380 This can be used for finding the type associated with that index
381 or for associating a new type with the index. */
383 static struct type
**
384 coff_lookup_type (index
)
387 if (index
>= type_vector_length
)
389 int old_vector_length
= type_vector_length
;
391 type_vector_length
*= 2;
392 if (index
/* is still */ >= type_vector_length
)
393 type_vector_length
= index
* 2;
395 type_vector
= (struct type
**)
396 xrealloc ((char *) type_vector
,
397 type_vector_length
* sizeof (struct type
*));
398 memset (&type_vector
[old_vector_length
], 0,
399 (type_vector_length
- old_vector_length
) * sizeof(struct type
*));
401 return &type_vector
[index
];
404 /* Make sure there is a type allocated for type number index
405 and return the type object.
406 This can create an empty (zeroed) type object. */
409 coff_alloc_type (index
)
412 register struct type
**type_addr
= coff_lookup_type (index
);
413 register struct type
*type
= *type_addr
;
415 /* If we are referring to a type not known at all yet,
416 allocate an empty type for it.
417 We will fill it in later if we find out how. */
420 type
= alloc_type (current_objfile
);
426 /* Start a new symtab for a new source file.
427 This is called when a COFF ".file" symbol is seen;
428 it indicates the start of data for one original source file. */
431 coff_start_symtab (name
)
435 /* We fill in the filename later. start_symtab puts
436 this pointer into last_source_file and we put it in
437 subfiles->name, which end_symtab frees; that's why
438 it must be malloc'd. */
439 savestring (name
, strlen(name
)),
440 /* We never know the directory name for COFF. */
442 /* The start address is irrelevant, since we set
443 last_source_start_addr in coff_end_symtab. */
445 record_debugformat ("COFF");
448 /* Save the vital information from when starting to read a file,
449 for use when closing off the current file.
450 NAME is the file name the symbols came from, START_ADDR is the first
451 text address for the file, and SIZE is the number of bytes of text. */
454 complete_symtab (name
, start_addr
, size
)
456 CORE_ADDR start_addr
;
459 if (last_source_file
!= NULL
)
460 free (last_source_file
);
461 last_source_file
= savestring (name
, strlen (name
));
462 current_source_start_addr
= start_addr
;
463 current_source_end_addr
= start_addr
+ size
;
465 if (current_objfile
-> ei
.entry_point
>= current_source_start_addr
&&
466 current_objfile
-> ei
.entry_point
< current_source_end_addr
)
468 current_objfile
-> ei
.entry_file_lowpc
= current_source_start_addr
;
469 current_objfile
-> ei
.entry_file_highpc
= current_source_end_addr
;
473 /* Finish the symbol definitions for one main source file,
474 close off all the lexical contexts for that file
475 (creating struct block's for them), then make the
476 struct symtab for that file and put it in the list of all such. */
479 coff_end_symtab (objfile
)
480 struct objfile
*objfile
;
482 struct symtab
*symtab
;
484 last_source_start_addr
= current_source_start_addr
;
486 symtab
= end_symtab (current_source_end_addr
, objfile
, 0);
489 free_named_symtabs (symtab
->filename
);
491 /* Reinitialize for beginning of new file. */
492 last_source_file
= NULL
;
496 record_minimal_symbol (name
, address
, type
, objfile
)
499 enum minimal_symbol_type type
;
500 struct objfile
*objfile
;
502 /* We don't want TDESC entry points in the minimal symbol table */
503 if (name
[0] == '@') return;
505 prim_record_minimal_symbol (name
, address
, type
, objfile
);
508 /* coff_symfile_init ()
509 is the coff-specific initialization routine for reading symbols.
510 It is passed a struct objfile which contains, among other things,
511 the BFD for the file whose symbols are being read, and a slot for
512 a pointer to "private data" which we fill with cookies and other
513 treats for coff_symfile_read ().
515 We will only be called if this is a COFF or COFF-like file.
516 BFD handles figuring out the format of the file, and code in symtab.c
517 uses BFD's determination to vector to us.
519 The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
522 coff_symfile_init (objfile
)
523 struct objfile
*objfile
;
525 /* Allocate struct to keep track of stab reading. */
526 objfile
->sym_stab_info
= (struct dbx_symfile_info
*)
527 xmmalloc (objfile
->md
, sizeof (struct dbx_symfile_info
));
529 memset ((PTR
) objfile
->sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
531 /* Allocate struct to keep track of the symfile */
532 objfile
->sym_private
= xmmalloc (objfile
->md
,
533 sizeof (struct coff_symfile_info
));
535 memset (objfile
->sym_private
, 0, sizeof (struct coff_symfile_info
));
537 /* COFF objects may be reordered, so set OBJF_REORDERED. If we
538 find this causes a significant slowdown in gdb then we could
539 set it in the debug symbol readers only when necessary. */
540 objfile
->flags
|= OBJF_REORDERED
;
542 init_entry_point_info (objfile
);
545 /* This function is called for every section; it finds the outer limits
546 of the line table (minimum and maximum file offset) so that the
547 mainline code can read the whole thing for efficiency. */
551 find_linenos (abfd
, asect
, vpinfo
)
556 struct coff_symfile_info
*info
;
558 file_ptr offset
, maxoff
;
560 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
561 count
= asect
->lineno_count
;
566 size
= count
* local_linesz
;
568 info
= (struct coff_symfile_info
*)vpinfo
;
569 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
570 offset
= asect
->line_filepos
;
573 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
574 info
->min_lineno_offset
= offset
;
576 maxoff
= offset
+ size
;
577 if (maxoff
> info
->max_lineno_offset
)
578 info
->max_lineno_offset
= maxoff
;
582 /* The BFD for this file -- only good while we're actively reading
583 symbols into a psymtab or a symtab. */
585 static bfd
*symfile_bfd
;
587 /* Read a symbol file, after initialization by coff_symfile_init. */
591 coff_symfile_read (objfile
, section_offsets
, mainline
)
592 struct objfile
*objfile
;
593 struct section_offsets
*section_offsets
;
596 struct coff_symfile_info
*info
;
597 struct dbx_symfile_info
*dbxinfo
;
598 bfd
*abfd
= objfile
->obfd
;
599 coff_data_type
*cdata
= coff_data (abfd
);
600 char *name
= bfd_get_filename (abfd
);
604 int stringtab_offset
;
605 struct cleanup
*back_to
;
608 info
= (struct coff_symfile_info
*) objfile
-> sym_private
;
609 dbxinfo
= objfile
->sym_stab_info
;
610 symfile_bfd
= abfd
; /* Kludge for swap routines */
612 /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */
613 num_symbols
= bfd_get_symcount (abfd
); /* How many syms */
614 symtab_offset
= cdata
->sym_filepos
; /* Symbol table file offset */
615 stringtab_offset
= symtab_offset
+ /* String table file offset */
616 num_symbols
* cdata
->local_symesz
;
618 /* Set a few file-statics that give us specific information about
619 the particular COFF file format we're reading. */
620 local_n_btmask
= cdata
->local_n_btmask
;
621 local_n_btshft
= cdata
->local_n_btshft
;
622 local_n_tmask
= cdata
->local_n_tmask
;
623 local_n_tshift
= cdata
->local_n_tshift
;
624 local_linesz
= cdata
->local_linesz
;
625 local_symesz
= cdata
->local_symesz
;
626 local_auxesz
= cdata
->local_auxesz
;
628 /* Allocate space for raw symbol and aux entries, based on their
629 space requirements as reported by BFD. */
630 temp_sym
= (char *) xmalloc
631 (cdata
->local_symesz
+ cdata
->local_auxesz
);
632 temp_aux
= temp_sym
+ cdata
->local_symesz
;
633 back_to
= make_cleanup ((make_cleanup_func
) free_current_contents
, &temp_sym
);
635 /* We need to know whether this is a PE file, because in PE files,
636 unlike standard COFF files, symbol values are stored as offsets
637 from the section address, rather than as absolute addresses.
638 FIXME: We should use BFD to read the symbol table, and thus avoid
640 pe_file
= strncmp (bfd_get_target (objfile
->obfd
), "pe", 2) == 0;
644 /* Read the line number table, all at once. */
645 info
->min_lineno_offset
= 0;
646 info
->max_lineno_offset
= 0;
647 bfd_map_over_sections (abfd
, find_linenos
, (PTR
) info
);
649 make_cleanup ((make_cleanup_func
) free_linetab
, 0);
650 val
= init_lineno (abfd
, info
->min_lineno_offset
,
651 info
->max_lineno_offset
- info
->min_lineno_offset
);
653 error ("\"%s\": error reading line numbers\n", name
);
655 /* Now read the string table, all at once. */
657 make_cleanup ((make_cleanup_func
) free_stringtab
, 0);
658 val
= init_stringtab (abfd
, stringtab_offset
);
660 error ("\"%s\": can't get string table", name
);
662 init_minimal_symbol_collection ();
663 make_cleanup ((make_cleanup_func
) discard_minimal_symbols
, 0);
665 /* Now that the executable file is positioned at symbol table,
666 process it and define symbols accordingly. */
668 coff_symtab_read ((long) symtab_offset
, num_symbols
, section_offsets
,
671 /* Sort symbols alphabetically within each block. */
676 for (s
= objfile
-> symtabs
; s
!= NULL
; s
= s
-> next
)
677 sort_symtab_syms (s
);
680 /* Install any minimal symbols that have been collected as the current
681 minimal symbols for this objfile. */
683 install_minimal_symbols (objfile
);
685 bfd_map_over_sections (abfd
, coff_locate_sections
, (PTR
) info
);
689 if (! info
->stabstrsect
)
694 ("The debugging information in `%s' is corrupted.\n"
695 "The file has a `.stabs' section, but no `.stabstr' section.\n"),
697 return_to_top_level (RETURN_ERROR
);
700 /* FIXME: dubious. Why can't we use something normal like
701 bfd_get_section_contents? */
702 bfd_seek (abfd
, abfd
->where
, 0);
704 stabstrsize
= bfd_section_size (abfd
, info
->stabstrsect
);
706 coffstab_build_psymtabs (objfile
,
709 info
->textaddr
, info
->textsize
,
711 info
->stabstrsect
->filepos
, stabstrsize
);
714 do_cleanups (back_to
);
718 coff_new_init (ignore
)
719 struct objfile
*ignore
;
723 /* Perform any local cleanups required when we are done with a particular
724 objfile. I.E, we are in the process of discarding all symbol information
725 for an objfile, freeing up all memory held for it, and unlinking the
726 objfile struct from the global list of known objfiles. */
729 coff_symfile_finish (objfile
)
730 struct objfile
*objfile
;
732 if (objfile
-> sym_private
!= NULL
)
734 mfree (objfile
-> md
, objfile
-> sym_private
);
739 /* Given pointers to a symbol table in coff style exec file,
740 analyze them and create struct symtab's describing the symbols.
741 NSYMS is the number of symbols in the symbol table.
742 We read them one at a time using read_one_sym (). */
745 coff_symtab_read (symtab_offset
, nsyms
, section_offsets
, objfile
)
748 struct section_offsets
*section_offsets
;
749 struct objfile
*objfile
;
751 register struct context_stack
*new;
752 struct coff_symbol coff_symbol
;
753 register struct coff_symbol
*cs
= &coff_symbol
;
754 static struct internal_syment main_sym
;
755 static union internal_auxent main_aux
;
756 struct coff_symbol fcn_cs_saved
;
757 static struct internal_syment fcn_sym_saved
;
758 static union internal_auxent fcn_aux_saved
;
760 /* A .file is open. */
761 int in_source_file
= 0;
762 int next_file_symnum
= -1;
763 /* Name of the current file. */
764 char *filestring
= "";
766 int fcn_first_line
= 0;
767 int fcn_last_line
= 0;
768 int fcn_start_addr
= 0;
769 long fcn_line_ptr
= 0;
773 /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous....
774 it's hard to know I've really worked around it. The fix should be
775 harmless, anyway). The symptom of the bug is that the first
776 fread (in read_one_sym), will (in my example) actually get data
777 from file offset 268, when the fseek was to 264 (and ftell shows
778 264). This causes all hell to break loose. I was unable to
779 reproduce this on a short test program which operated on the same
780 file, performing (I think) the same sequence of operations.
782 It stopped happening when I put in this (former) rewind().
784 FIXME: Find out if this has been reported to Sun, whether it has
785 been fixed in a later release, etc. */
787 bfd_seek (objfile
->obfd
, 0, 0);
789 /* Position to read the symbol table. */
790 val
= bfd_seek (objfile
->obfd
, (long) symtab_offset
, 0);
792 perror_with_name (objfile
->name
);
794 current_objfile
= objfile
;
795 nlist_bfd_global
= objfile
->obfd
;
796 nlist_nsyms_global
= nsyms
;
797 last_source_file
= NULL
;
798 memset (opaque_type_chain
, 0, sizeof opaque_type_chain
);
800 if (type_vector
) /* Get rid of previous one */
801 free ((PTR
) type_vector
);
802 type_vector_length
= 160;
803 type_vector
= (struct type
**)
804 xmalloc (type_vector_length
* sizeof (struct type
*));
805 memset (type_vector
, 0, type_vector_length
* sizeof (struct type
*));
807 coff_start_symtab ("");
810 while (symnum
< nsyms
)
812 QUIT
; /* Make this command interruptable. */
814 read_one_sym (cs
, &main_sym
, &main_aux
);
816 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
818 if (last_source_file
)
819 coff_end_symtab (objfile
);
821 coff_start_symtab ("_globals_");
822 complete_symtab ("_globals_", 0, 0);
823 /* done with all files, everything from here on out is globals */
826 /* Special case for file with type declarations only, no text. */
827 if (!last_source_file
&& SDB_TYPE (cs
->c_type
)
828 && cs
->c_secnum
== N_DEBUG
)
829 complete_symtab (filestring
, 0, 0);
831 /* Typedefs should not be treated as symbol definitions. */
832 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
834 /* Record all functions -- external and static -- in minsyms. */
835 tmpaddr
= cs
->c_value
+ ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
836 record_minimal_symbol (cs
->c_name
, tmpaddr
, mst_text
, objfile
);
838 fcn_line_ptr
= main_aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
839 fcn_start_addr
= tmpaddr
;
841 fcn_sym_saved
= main_sym
;
842 fcn_aux_saved
= main_aux
;
846 switch (cs
->c_sclass
)
855 complain (&bad_sclass_complaint
, cs
->c_name
);
859 /* c_value field contains symnum of next .file entry in table
860 or symnum of first global after last .file. */
861 next_file_symnum
= cs
->c_value
;
863 filestring
= coff_getfilename (&main_aux
);
867 /* Complete symbol table for last object file
868 containing debugging information. */
869 if (last_source_file
)
871 coff_end_symtab (objfile
);
872 coff_start_symtab (filestring
);
877 /* C_LABEL is used for labels and static functions. Including
878 it here allows gdb to see static functions when no debug
879 info is available. */
881 /* However, labels within a function can make weird backtraces,
882 so filter them out (from phdm@macqel.be). */
888 case C_THUMBSTATFUNC
:
889 if (cs
->c_name
[0] == '.')
891 if (STREQ (cs
->c_name
, ".text")) {
892 /* FIXME: don't wire in ".text" as section name
894 /* Check for in_source_file deals with case of
895 a file with debugging symbols
896 followed by a later file with no symbols. */
898 complete_symtab (filestring
,
899 cs
->c_value
+ ANOFFSET (section_offsets
, SECT_OFF_TEXT
),
900 main_aux
.x_scn
.x_scnlen
);
903 /* flush rest of '.' symbols */
906 else if (!SDB_TYPE (cs
->c_type
)
907 && cs
->c_name
[0] == 'L'
908 && (strncmp (cs
->c_name
, "LI%", 3) == 0
909 || strncmp (cs
->c_name
, "LF%", 3) == 0
910 || strncmp (cs
->c_name
,"LC%",3) == 0
911 || strncmp (cs
->c_name
,"LP%",3) == 0
912 || strncmp (cs
->c_name
,"LPB%",4) == 0
913 || strncmp (cs
->c_name
,"LBB%",4) == 0
914 || strncmp (cs
->c_name
,"LBE%",4) == 0
915 || strncmp (cs
->c_name
,"LPBX%",5) == 0))
916 /* At least on a 3b1, gcc generates swbeg and string labels
917 that look like this. Ignore them. */
919 /* fall in for static symbols that don't start with '.' */
924 /* Record it in the minimal symbols regardless of
925 SDB_TYPE. This parallels what we do for other debug
926 formats, and probably is needed to make
927 print_address_symbolic work right without the (now
928 gone) "set fast-symbolic-addr off" kludge. */
930 /* FIXME: should use mst_abs, and not relocate, if absolute. */
931 enum minimal_symbol_type ms_type
;
934 if (cs
->c_secnum
== N_UNDEF
)
936 /* This is a common symbol. See if the target
937 environment knows where it has been relocated to. */
939 if (target_lookup_symbol (cs
->c_name
, &reladdr
))
941 /* Error in lookup; ignore symbol. */
945 /* The address has already been relocated; make sure that
946 objfile_relocate doesn't relocate it again. */
948 ms_type
= cs
->c_sclass
== C_EXT
949 || cs
->c_sclass
== C_THUMBEXT
?
950 mst_bss
: mst_file_bss
;
954 sec
= cs_to_section (cs
, objfile
);
955 tmpaddr
= cs
->c_value
;
956 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXTFUNC
957 || cs
->c_sclass
== C_THUMBEXT
)
958 tmpaddr
+= ANOFFSET (section_offsets
, sec
);
963 case SECT_OFF_RODATA
:
965 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXTFUNC
966 || cs
->c_sclass
== C_THUMBEXT
?
967 mst_text
: mst_file_text
;
968 #ifdef SMASH_TEXT_ADDRESS
969 if (tmpaddr
& 1) /* FIXME: delete this line */
970 SMASH_TEXT_ADDRESS (tmpaddr
);
975 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
?
976 mst_data
: mst_file_data
;
980 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
?
981 mst_data
: mst_file_data
;
984 ms_type
= mst_unknown
;
989 if (cs
->c_name
[0] != '@' /* Skip tdesc symbols */)
991 struct minimal_symbol
*msym
;
993 msym
= prim_record_minimal_symbol_and_info
994 (cs
->c_name
, tmpaddr
, ms_type
, (char *)cs
->c_sclass
, sec
,
996 #ifdef COFF_MAKE_MSYMBOL_SPECIAL
998 COFF_MAKE_MSYMBOL_SPECIAL(cs
->c_sclass
, msym
);
1001 if (SDB_TYPE (cs
->c_type
))
1004 sym
= process_coff_symbol
1005 (cs
, &main_aux
, section_offsets
, objfile
);
1006 SYMBOL_VALUE (sym
) = tmpaddr
;
1007 SYMBOL_SECTION (sym
) = sec
;
1013 if (STREQ (cs
->c_name
, ".bf"))
1015 within_function
= 1;
1017 /* value contains address of first non-init type code */
1018 /* main_aux.x_sym.x_misc.x_lnsz.x_lnno
1019 contains line number of '{' } */
1020 if (cs
->c_naux
!= 1)
1021 complain (&bf_no_aux_complaint
, cs
->c_symnum
);
1022 fcn_first_line
= main_aux
.x_sym
.x_misc
.x_lnsz
.x_lnno
;
1024 /* Might want to check that locals are 0 and
1025 context_stack_depth is zero, and complain if not. */
1028 new = push_context (depth
, fcn_start_addr
);
1029 fcn_cs_saved
.c_name
= getsymname (&fcn_sym_saved
);
1031 process_coff_symbol (&fcn_cs_saved
, &fcn_aux_saved
,
1032 section_offsets
, objfile
);
1033 record_line (current_subfile
, fcn_first_line
, cs
->c_value
);
1035 else if (STREQ (cs
->c_name
, ".ef"))
1037 /* the value of .ef is the address of epilogue code;
1038 not useful for gdb. */
1039 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1040 contains number of lines to '}' */
1042 if (context_stack_depth
<= 0)
1043 { /* We attempted to pop an empty context stack */
1044 complain (&ef_stack_complaint
, cs
->c_symnum
);
1045 within_function
= 0;
1049 new = pop_context ();
1050 /* Stack must be empty now. */
1051 if (context_stack_depth
> 0 || new == NULL
)
1053 complain (&ef_complaint
, cs
->c_symnum
);
1054 within_function
= 0;
1057 if (cs
->c_naux
!= 1)
1059 complain (&ef_no_aux_complaint
, cs
->c_symnum
);
1060 fcn_last_line
= 0x7FFFFFFF;
1064 fcn_last_line
= main_aux
.x_sym
.x_misc
.x_lnsz
.x_lnno
;
1066 enter_linenos (fcn_line_ptr
, fcn_first_line
, fcn_last_line
,
1069 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1071 #if defined (FUNCTION_EPILOGUE_SIZE)
1072 /* This macro should be defined only on
1074 fcn_aux_saved.x_sym.x_misc.x_fsize
1075 field is always zero.
1076 So use the .bf record information that
1077 points to the epilogue and add the size
1080 + FUNCTION_EPILOGUE_SIZE
1081 + ANOFFSET (section_offsets
, SECT_OFF_TEXT
),
1083 fcn_cs_saved
.c_value
1084 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1085 + ANOFFSET (section_offsets
, SECT_OFF_TEXT
),
1089 within_function
= 0;
1094 if (STREQ (cs
->c_name
, ".bb"))
1096 tmpaddr
= cs
->c_value
;
1097 tmpaddr
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1098 push_context (++depth
, tmpaddr
);
1100 else if (STREQ (cs
->c_name
, ".eb"))
1102 if (context_stack_depth
<= 0)
1103 { /* We attempted to pop an empty context stack */
1104 complain (&eb_stack_complaint
, cs
->c_symnum
);
1108 new = pop_context ();
1109 if (depth
-- != new->depth
)
1111 complain (&eb_complaint
, symnum
);
1114 if (local_symbols
&& context_stack_depth
> 0)
1117 cs
->c_value
+ ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1118 /* Make a block for the local symbols within. */
1119 finish_block (0, &local_symbols
, new->old_blocks
,
1120 new->start_addr
, tmpaddr
, objfile
);
1122 /* Now pop locals of block just finished. */
1123 local_symbols
= new->locals
;
1128 process_coff_symbol (cs
, &main_aux
, section_offsets
, objfile
);
1133 if (last_source_file
)
1134 coff_end_symtab (objfile
);
1136 /* Patch up any opaque types (references to types that are not defined
1137 in the file where they are referenced, e.g. "struct foo *bar"). */
1138 ALL_OBJFILE_SYMTABS (objfile
, s
)
1139 patch_opaque_types (s
);
1141 current_objfile
= NULL
;
1144 /* Routines for reading headers and symbols from executable. */
1146 /* Read the next symbol, swap it, and return it in both internal_syment
1147 form, and coff_symbol form. Also return its first auxent, if any,
1148 in internal_auxent form, and skip any other auxents. */
1151 read_one_sym (cs
, sym
, aux
)
1152 register struct coff_symbol
*cs
;
1153 register struct internal_syment
*sym
;
1154 register union internal_auxent
*aux
;
1158 cs
->c_symnum
= symnum
;
1159 bfd_read (temp_sym
, local_symesz
, 1, nlist_bfd_global
);
1160 bfd_coff_swap_sym_in (symfile_bfd
, temp_sym
, (char *)sym
);
1161 cs
->c_naux
= sym
->n_numaux
& 0xff;
1162 if (cs
->c_naux
>= 1)
1164 bfd_read (temp_aux
, local_auxesz
, 1, nlist_bfd_global
);
1165 bfd_coff_swap_aux_in (symfile_bfd
, temp_aux
, sym
->n_type
, sym
->n_sclass
,
1166 0, cs
->c_naux
, (char *)aux
);
1167 /* If more than one aux entry, read past it (only the first aux
1169 for (i
= 1; i
< cs
->c_naux
; i
++)
1170 bfd_read (temp_aux
, local_auxesz
, 1, nlist_bfd_global
);
1172 cs
->c_name
= getsymname (sym
);
1173 cs
->c_value
= sym
->n_value
;
1174 cs
->c_sclass
= (sym
->n_sclass
& 0xff);
1175 cs
->c_secnum
= sym
->n_scnum
;
1176 cs
->c_type
= (unsigned) sym
->n_type
;
1177 if (!SDB_TYPE (cs
->c_type
))
1181 if (cs
->c_sclass
& 128)
1182 printf("thumb symbol %s, class 0x%x\n", cs
->c_name
, cs
->c_sclass
);
1185 symnum
+= 1 + cs
->c_naux
;
1187 /* The PE file format stores symbol values as offsets within the
1188 section, rather than as absolute addresses. We correct that
1189 here, if the symbol has an appropriate storage class. FIXME: We
1190 should use BFD to read the symbols, rather than duplicating the
1194 switch (cs
->c_sclass
)
1198 case C_THUMBEXTFUNC
:
1203 case C_THUMBSTATFUNC
:
1209 if (cs
->c_secnum
!= 0)
1210 cs
->c_value
+= cs_section_address (cs
, symfile_bfd
);
1216 /* Support for string table handling */
1218 static char *stringtab
= NULL
;
1221 init_stringtab (abfd
, offset
)
1227 unsigned char lengthbuf
[4];
1231 /* If the file is stripped, the offset might be zero, indicating no
1232 string table. Just return with `stringtab' set to null. */
1236 if (bfd_seek (abfd
, offset
, 0) < 0)
1239 val
= bfd_read ((char *)lengthbuf
, sizeof lengthbuf
, 1, abfd
);
1240 length
= bfd_h_get_32 (symfile_bfd
, lengthbuf
);
1242 /* If no string table is needed, then the file may end immediately
1243 after the symbols. Just return with `stringtab' set to null. */
1244 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1247 stringtab
= (char *) xmalloc (length
);
1248 /* This is in target format (probably not very useful, and not currently
1249 used), not host format. */
1250 memcpy (stringtab
, lengthbuf
, sizeof lengthbuf
);
1251 if (length
== sizeof length
) /* Empty table -- just the count */
1254 val
= bfd_read (stringtab
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, 1, abfd
);
1255 if (val
!= length
- sizeof lengthbuf
|| stringtab
[length
- 1] != '\0')
1270 getsymname (symbol_entry
)
1271 struct internal_syment
*symbol_entry
;
1273 static char buffer
[SYMNMLEN
+1];
1276 if (symbol_entry
->_n
._n_n
._n_zeroes
== 0)
1278 /* FIXME: Probably should be detecting corrupt symbol files by
1279 seeing whether offset points to within the stringtab. */
1280 result
= stringtab
+ symbol_entry
->_n
._n_n
._n_offset
;
1284 strncpy (buffer
, symbol_entry
->_n
._n_name
, SYMNMLEN
);
1285 buffer
[SYMNMLEN
] = '\0';
1291 /* Extract the file name from the aux entry of a C_FILE symbol. Return
1292 only the last component of the name. Result is in static storage and
1293 is only good for temporary use. */
1296 coff_getfilename (aux_entry
)
1297 union internal_auxent
*aux_entry
;
1299 static char buffer
[BUFSIZ
];
1300 register char *temp
;
1303 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1304 strcpy (buffer
, stringtab
+ aux_entry
->x_file
.x_n
.x_offset
);
1307 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1308 buffer
[FILNMLEN
] = '\0';
1312 /* FIXME: We should not be throwing away the information about what
1313 directory. It should go into dirname of the symtab, or some such
1315 if ((temp
= strrchr (result
, '/')) != NULL
)
1320 /* Support for line number handling. */
1322 static char *linetab
= NULL
;
1323 static long linetab_offset
;
1324 static unsigned long linetab_size
;
1326 /* Read in all the line numbers for fast lookups later. Leave them in
1327 external (unswapped) format in memory; we'll swap them as we enter
1328 them into GDB's data structures. */
1331 init_lineno (abfd
, offset
, size
)
1338 linetab_offset
= offset
;
1339 linetab_size
= size
;
1346 if (bfd_seek (abfd
, offset
, 0) < 0)
1349 /* Allocate the desired table, plus a sentinel */
1350 linetab
= (char *) xmalloc (size
+ local_linesz
);
1352 val
= bfd_read (linetab
, size
, 1, abfd
);
1356 /* Terminate it with an all-zero sentinel record */
1357 memset (linetab
+ size
, 0, local_linesz
);
1370 #if !defined (L_LNNO32)
1371 #define L_LNNO32(lp) ((lp)->l_lnno)
1375 enter_linenos (file_offset
, first_line
, last_line
, section_offsets
)
1377 register int first_line
;
1378 register int last_line
;
1379 struct section_offsets
*section_offsets
;
1381 register char *rawptr
;
1382 struct internal_lineno lptr
;
1386 if (file_offset
< linetab_offset
)
1388 complain (&lineno_complaint
, file_offset
);
1389 if (file_offset
> linetab_size
) /* Too big to be an offset? */
1391 file_offset
+= linetab_offset
; /* Try reading at that linetab offset */
1394 rawptr
= &linetab
[file_offset
- linetab_offset
];
1396 /* skip first line entry for each function */
1397 rawptr
+= local_linesz
;
1398 /* line numbers start at one for the first line of the function */
1402 bfd_coff_swap_lineno_in (symfile_bfd
, rawptr
, &lptr
);
1403 rawptr
+= local_linesz
;
1404 /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */
1405 if (L_LNNO32 (&lptr
) && L_LNNO32 (&lptr
) <= last_line
)
1406 record_line (current_subfile
, first_line
+ L_LNNO32 (&lptr
),
1408 + ANOFFSET (section_offsets
, SECT_OFF_TEXT
));
1415 patch_type (type
, real_type
)
1417 struct type
*real_type
;
1419 register struct type
*target
= TYPE_TARGET_TYPE (type
);
1420 register struct type
*real_target
= TYPE_TARGET_TYPE (real_type
);
1421 int field_size
= TYPE_NFIELDS (real_target
) * sizeof (struct field
);
1423 TYPE_LENGTH (target
) = TYPE_LENGTH (real_target
);
1424 TYPE_NFIELDS (target
) = TYPE_NFIELDS (real_target
);
1425 TYPE_FIELDS (target
) = (struct field
*) TYPE_ALLOC (target
, field_size
);
1427 memcpy (TYPE_FIELDS (target
), TYPE_FIELDS (real_target
), field_size
);
1429 if (TYPE_NAME (real_target
))
1431 if (TYPE_NAME (target
))
1432 free (TYPE_NAME (target
));
1433 TYPE_NAME (target
) = concat (TYPE_NAME (real_target
), NULL
);
1437 /* Patch up all appropriate typedef symbols in the opaque_type_chains
1438 so that they can be used to print out opaque data structures properly. */
1441 patch_opaque_types (s
)
1444 register struct block
*b
;
1446 register struct symbol
*real_sym
;
1448 /* Go through the per-file symbols only */
1449 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
1450 for (i
= BLOCK_NSYMS (b
) - 1; i
>= 0; i
--)
1452 /* Find completed typedefs to use to fix opaque ones.
1453 Remove syms from the chain when their types are stored,
1454 but search the whole chain, as there may be several syms
1455 from different files with the same name. */
1456 real_sym
= BLOCK_SYM (b
, i
);
1457 if (SYMBOL_CLASS (real_sym
) == LOC_TYPEDEF
&&
1458 SYMBOL_NAMESPACE (real_sym
) == VAR_NAMESPACE
&&
1459 TYPE_CODE (SYMBOL_TYPE (real_sym
)) == TYPE_CODE_PTR
&&
1460 TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym
))) != 0)
1462 register char *name
= SYMBOL_NAME (real_sym
);
1463 register int hash
= hashname (name
);
1464 register struct symbol
*sym
, *prev
;
1467 for (sym
= opaque_type_chain
[hash
]; sym
;)
1469 if (name
[0] == SYMBOL_NAME (sym
)[0] &&
1470 STREQ (name
+ 1, SYMBOL_NAME (sym
) + 1))
1474 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
1478 opaque_type_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
1481 patch_type (SYMBOL_TYPE (sym
), SYMBOL_TYPE (real_sym
));
1485 sym
= SYMBOL_VALUE_CHAIN (prev
);
1489 sym
= opaque_type_chain
[hash
];
1495 sym
= SYMBOL_VALUE_CHAIN (sym
);
1502 static struct symbol
*
1503 process_coff_symbol (cs
, aux
, section_offsets
, objfile
)
1504 register struct coff_symbol
*cs
;
1505 register union internal_auxent
*aux
;
1506 struct section_offsets
*section_offsets
;
1507 struct objfile
*objfile
;
1509 register struct symbol
*sym
1510 = (struct symbol
*) obstack_alloc (&objfile
->symbol_obstack
,
1511 sizeof (struct symbol
));
1514 memset (sym
, 0, sizeof (struct symbol
));
1516 name
= EXTERNAL_NAME (name
, objfile
->obfd
);
1517 SYMBOL_NAME (sym
) = obsavestring (name
, strlen (name
),
1518 &objfile
->symbol_obstack
);
1519 SYMBOL_LANGUAGE (sym
) = language_auto
;
1520 SYMBOL_INIT_DEMANGLED_NAME (sym
, &objfile
->symbol_obstack
);
1522 /* default assumptions */
1523 SYMBOL_VALUE (sym
) = cs
->c_value
;
1524 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1525 SYMBOL_SECTION (sym
) = cs_to_section (cs
, objfile
);
1527 if (ISFCN (cs
->c_type
))
1529 SYMBOL_VALUE (sym
) += ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1531 lookup_function_type (decode_function_type (cs
, cs
->c_type
, aux
));
1533 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1534 if (cs
->c_sclass
== C_STAT
|| cs
->c_sclass
== C_THUMBSTAT
1535 || cs
->c_sclass
== C_THUMBSTATFUNC
)
1536 add_symbol_to_list (sym
, &file_symbols
);
1537 else if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
1538 || cs
->c_sclass
== C_THUMBEXTFUNC
)
1539 add_symbol_to_list (sym
, &global_symbols
);
1543 SYMBOL_TYPE (sym
) = decode_type (cs
, cs
->c_type
, aux
);
1544 switch (cs
->c_sclass
)
1550 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1551 add_symbol_to_list (sym
, &local_symbols
);
1555 case C_THUMBEXTFUNC
:
1557 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1558 SYMBOL_VALUE_ADDRESS (sym
) = (CORE_ADDR
) cs
->c_value
;
1559 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1560 add_symbol_to_list (sym
, &global_symbols
);
1564 case C_THUMBSTATFUNC
:
1566 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1567 SYMBOL_VALUE_ADDRESS (sym
) = (CORE_ADDR
) cs
->c_value
;
1568 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1569 if (within_function
) {
1570 /* Static symbol of local scope */
1571 add_symbol_to_list (sym
, &local_symbols
);
1574 /* Static symbol at top level of file */
1575 add_symbol_to_list (sym
, &file_symbols
);
1579 #ifdef C_GLBLREG /* AMD coff */
1583 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1584 SYMBOL_VALUE (sym
) = SDB_REG_TO_REGNUM(cs
->c_value
);
1585 add_symbol_to_list (sym
, &local_symbols
);
1593 SYMBOL_CLASS (sym
) = LOC_ARG
;
1594 add_symbol_to_list (sym
, &local_symbols
);
1595 #if !defined (BELIEVE_PCC_PROMOTION)
1596 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
1598 /* If PCC says a parameter is a short or a char,
1599 aligned on an int boundary, realign it to the
1600 "little end" of the int. */
1601 struct type
*temptype
;
1602 temptype
= lookup_fundamental_type (current_objfile
,
1604 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) < TYPE_LENGTH (temptype
)
1605 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
1606 && 0 == SYMBOL_VALUE (sym
) % TYPE_LENGTH (temptype
))
1608 SYMBOL_VALUE (sym
) +=
1609 TYPE_LENGTH (temptype
)
1610 - TYPE_LENGTH (SYMBOL_TYPE (sym
));
1617 SYMBOL_CLASS (sym
) = LOC_REGPARM
;
1618 SYMBOL_VALUE (sym
) = SDB_REG_TO_REGNUM(cs
->c_value
);
1619 add_symbol_to_list (sym
, &local_symbols
);
1620 #if !defined (BELIEVE_PCC_PROMOTION)
1621 /* FIXME: This should retain the current type, since it's just
1622 a register value. gnu@adobe, 26Feb93 */
1624 /* If PCC says a parameter is a short or a char,
1625 it is really an int. */
1626 struct type
*temptype
;
1628 lookup_fundamental_type (current_objfile
, FT_INTEGER
);
1629 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) < TYPE_LENGTH (temptype
)
1630 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
1633 (TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
1634 ? lookup_fundamental_type (current_objfile
,
1635 FT_UNSIGNED_INTEGER
)
1643 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1644 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1646 /* If type has no name, give it one */
1647 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1649 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1650 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1652 /* If we are giving a name to a type such as "pointer to
1653 foo" or "function returning foo", we better not set
1654 the TYPE_NAME. If the program contains "typedef char
1655 *caddr_t;", we don't want all variables of type char
1656 * to print as caddr_t. This is not just a
1657 consequence of GDB's type management; CC and GCC (at
1658 least through version 2.4) both output variables of
1659 either type char * or caddr_t with the type
1660 refering to the C_TPDEF symbol for caddr_t. If a future
1661 compiler cleans this up it GDB is not ready for it
1662 yet, but if it becomes ready we somehow need to
1663 disable this check (without breaking the PCC/GCC2.4
1668 Fortunately, this check seems not to be necessary
1669 for anything except pointers or functions. */
1673 TYPE_NAME (SYMBOL_TYPE (sym
)) =
1674 concat (SYMBOL_NAME (sym
), NULL
);
1677 /* Ignore vendor section for Harris CX/UX targets. */
1678 else if (cs
->c_name
[0] == '$')
1680 #endif /* CXUX_TARGET */
1682 /* Keep track of any type which points to empty structured type,
1683 so it can be filled from a definition from another file. A
1684 simple forward reference (TYPE_CODE_UNDEF) is not an
1685 empty structured type, though; the forward references
1686 work themselves out via the magic of coff_lookup_type. */
1687 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
&&
1688 TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym
))) == 0 &&
1689 TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym
))) !=
1692 register int i
= hashname (SYMBOL_NAME (sym
));
1694 SYMBOL_VALUE_CHAIN (sym
) = opaque_type_chain
[i
];
1695 opaque_type_chain
[i
] = sym
;
1697 add_symbol_to_list (sym
, &file_symbols
);
1703 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1704 SYMBOL_NAMESPACE (sym
) = STRUCT_NAMESPACE
;
1706 /* Some compilers try to be helpful by inventing "fake"
1707 names for anonymous enums, structures, and unions, like
1708 "~0fake" or ".0fake". Thanks, but no thanks... */
1709 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1710 if (SYMBOL_NAME(sym
) != NULL
1711 && *SYMBOL_NAME(sym
) != '~'
1712 && *SYMBOL_NAME(sym
) != '.')
1713 TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) =
1714 concat (SYMBOL_NAME (sym
), NULL
);
1716 add_symbol_to_list (sym
, &file_symbols
);
1726 /* Decode a coff type specifier; return the type that is meant. */
1728 static struct type
*
1729 decode_type (cs
, c_type
, aux
)
1730 register struct coff_symbol
*cs
;
1731 unsigned int c_type
;
1732 register union internal_auxent
*aux
;
1734 register struct type
*type
= 0;
1735 unsigned int new_c_type
;
1737 if (c_type
& ~N_BTMASK
)
1739 new_c_type
= DECREF (c_type
);
1742 type
= decode_type (cs
, new_c_type
, aux
);
1743 type
= lookup_pointer_type (type
);
1745 else if (ISFCN (c_type
))
1747 type
= decode_type (cs
, new_c_type
, aux
);
1748 type
= lookup_function_type (type
);
1750 else if (ISARY (c_type
))
1753 register unsigned short *dim
;
1754 struct type
*base_type
, *index_type
, *range_type
;
1756 /* Define an array type. */
1757 /* auxent refers to array, not base type */
1758 if (aux
->x_sym
.x_tagndx
.l
== 0)
1761 /* shift the indices down */
1762 dim
= &aux
->x_sym
.x_fcnary
.x_ary
.x_dimen
[0];
1765 for (i
= 0; *dim
&& i
< DIMNUM
- 1; i
++, dim
++)
1769 base_type
= decode_type (cs
, new_c_type
, aux
);
1770 index_type
= lookup_fundamental_type (current_objfile
, FT_INTEGER
);
1772 create_range_type ((struct type
*) NULL
, index_type
, 0, n
- 1);
1774 create_array_type ((struct type
*) NULL
, base_type
, range_type
);
1779 /* Reference to existing type. This only occurs with the
1780 struct, union, and enum types. EPI a29k coff
1781 fakes us out by producing aux entries with a nonzero
1782 x_tagndx for definitions of structs, unions, and enums, so we
1783 have to check the c_sclass field. SCO 3.2v4 cc gets confused
1784 with pointers to pointers to defined structs, and generates
1785 negative x_tagndx fields. */
1786 if (cs
->c_naux
> 0 && aux
->x_sym
.x_tagndx
.l
!= 0)
1788 if (cs
->c_sclass
!= C_STRTAG
1789 && cs
->c_sclass
!= C_UNTAG
1790 && cs
->c_sclass
!= C_ENTAG
1791 && aux
->x_sym
.x_tagndx
.l
>= 0)
1793 type
= coff_alloc_type (aux
->x_sym
.x_tagndx
.l
);
1798 complain (&tagndx_bad_complaint
, cs
->c_name
);
1799 /* And fall through to decode_base_type... */
1803 return decode_base_type (cs
, BTYPE (c_type
), aux
);
1806 /* Decode a coff type specifier for function definition;
1807 return the type that the function returns. */
1809 static struct type
*
1810 decode_function_type (cs
, c_type
, aux
)
1811 register struct coff_symbol
*cs
;
1812 unsigned int c_type
;
1813 register union internal_auxent
*aux
;
1815 if (aux
->x_sym
.x_tagndx
.l
== 0)
1816 cs
->c_naux
= 0; /* auxent refers to function, not base type */
1818 return decode_type (cs
, DECREF (c_type
), aux
);
1823 static struct type
*
1824 decode_base_type (cs
, c_type
, aux
)
1825 register struct coff_symbol
*cs
;
1826 unsigned int c_type
;
1827 register union internal_auxent
*aux
;
1834 /* shows up with "void (*foo)();" structure members */
1835 return lookup_fundamental_type (current_objfile
, FT_VOID
);
1838 /* DGUX actually defines both T_ARG and T_VOID to the same value. */
1841 /* Shows up in DGUX, I think. Not sure where. */
1842 return lookup_fundamental_type (current_objfile
, FT_VOID
); /* shouldn't show up here */
1848 /* Intel 960 COFF has this symbol and meaning. */
1849 return lookup_fundamental_type (current_objfile
, FT_VOID
);
1853 return lookup_fundamental_type (current_objfile
, FT_CHAR
);
1856 return lookup_fundamental_type (current_objfile
, FT_SHORT
);
1859 return lookup_fundamental_type (current_objfile
, FT_INTEGER
);
1862 if (cs
->c_sclass
== C_FIELD
1863 && aux
->x_sym
.x_misc
.x_lnsz
.x_size
> TARGET_LONG_BIT
)
1864 return lookup_fundamental_type (current_objfile
, FT_LONG_LONG
);
1866 return lookup_fundamental_type (current_objfile
, FT_LONG
);
1869 return lookup_fundamental_type (current_objfile
, FT_FLOAT
);
1872 return lookup_fundamental_type (current_objfile
, FT_DBL_PREC_FLOAT
);
1875 return lookup_fundamental_type (current_objfile
, FT_EXT_PREC_FLOAT
);
1878 if (cs
->c_naux
!= 1)
1880 /* anonymous structure type */
1881 type
= coff_alloc_type (cs
->c_symnum
);
1882 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
1883 TYPE_NAME (type
) = NULL
;
1884 /* This used to set the tag to "<opaque>". But I think setting it
1885 to NULL is right, and the printing code can print it as
1887 TYPE_TAG_NAME (type
) = NULL
;
1888 INIT_CPLUS_SPECIFIC(type
);
1889 TYPE_LENGTH (type
) = 0;
1890 TYPE_FIELDS (type
) = 0;
1891 TYPE_NFIELDS (type
) = 0;
1895 type
= coff_read_struct_type (cs
->c_symnum
,
1896 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1897 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
);
1902 if (cs
->c_naux
!= 1)
1904 /* anonymous union type */
1905 type
= coff_alloc_type (cs
->c_symnum
);
1906 TYPE_NAME (type
) = NULL
;
1907 /* This used to set the tag to "<opaque>". But I think setting it
1908 to NULL is right, and the printing code can print it as
1910 TYPE_TAG_NAME (type
) = NULL
;
1911 INIT_CPLUS_SPECIFIC(type
);
1912 TYPE_LENGTH (type
) = 0;
1913 TYPE_FIELDS (type
) = 0;
1914 TYPE_NFIELDS (type
) = 0;
1918 type
= coff_read_struct_type (cs
->c_symnum
,
1919 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1920 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
);
1922 TYPE_CODE (type
) = TYPE_CODE_UNION
;
1926 if (cs
->c_naux
!= 1)
1928 /* anonymous enum type */
1929 type
= coff_alloc_type (cs
->c_symnum
);
1930 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
1931 TYPE_NAME (type
) = NULL
;
1932 /* This used to set the tag to "<opaque>". But I think setting it
1933 to NULL is right, and the printing code can print it as
1935 TYPE_TAG_NAME (type
) = NULL
;
1936 TYPE_LENGTH (type
) = 0;
1937 TYPE_FIELDS (type
) = 0;
1938 TYPE_NFIELDS(type
) = 0;
1942 type
= coff_read_enum_type (cs
->c_symnum
,
1943 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1944 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
);
1949 /* shouldn't show up here */
1953 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_CHAR
);
1956 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_SHORT
);
1959 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_INTEGER
);
1962 if (cs
->c_sclass
== C_FIELD
1963 && aux
->x_sym
.x_misc
.x_lnsz
.x_size
> TARGET_LONG_BIT
)
1964 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_LONG_LONG
);
1966 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_LONG
);
1968 complain (&unexpected_type_complaint
, cs
->c_name
);
1969 return lookup_fundamental_type (current_objfile
, FT_VOID
);
1972 /* This page contains subroutines of read_type. */
1974 /* Read the description of a structure (or union type) and return an
1975 object describing the type. */
1977 static struct type
*
1978 coff_read_struct_type (index
, length
, lastsym
)
1985 struct nextfield
*next
;
1989 register struct type
*type
;
1990 register struct nextfield
*list
= 0;
1991 struct nextfield
*new;
1995 struct coff_symbol member_sym
;
1996 register struct coff_symbol
*ms
= &member_sym
;
1997 struct internal_syment sub_sym
;
1998 union internal_auxent sub_aux
;
2001 type
= coff_alloc_type (index
);
2002 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
2003 INIT_CPLUS_SPECIFIC(type
);
2004 TYPE_LENGTH (type
) = length
;
2006 while (!done
&& symnum
< lastsym
&& symnum
< nlist_nsyms_global
)
2008 read_one_sym (ms
, &sub_sym
, &sub_aux
);
2010 name
= EXTERNAL_NAME (name
, current_objfile
->obfd
);
2012 switch (ms
->c_sclass
)
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
) = 8 * ms
->c_value
;
2029 FIELD_BITSIZE (list
->field
) = 0;
2035 /* Get space to record the next field's data. */
2036 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
2040 /* Save the data. */
2044 ¤t_objfile
->symbol_obstack
);
2045 FIELD_TYPE (list
->field
) = decode_type (ms
, ms
->c_type
, &sub_aux
);
2046 FIELD_BITPOS (list
->field
) = ms
->c_value
;
2047 FIELD_BITSIZE (list
->field
) = sub_aux
.x_sym
.x_misc
.x_lnsz
.x_size
;
2056 /* Now create the vector of fields, and record how big it is. */
2058 TYPE_NFIELDS (type
) = nfields
;
2059 TYPE_FIELDS (type
) = (struct field
*)
2060 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
2062 /* Copy the saved-up fields into the field vector. */
2064 for (n
= nfields
; list
; list
= list
->next
)
2065 TYPE_FIELD (type
, --n
) = list
->field
;
2070 /* Read a definition of an enumeration type,
2071 and create and return a suitable type object.
2072 Also defines the symbols that represent the values of the type. */
2075 static struct type
*
2076 coff_read_enum_type (index
, length
, lastsym
)
2081 register struct symbol
*sym
;
2082 register struct type
*type
;
2085 struct pending
**symlist
;
2086 struct coff_symbol member_sym
;
2087 register struct coff_symbol
*ms
= &member_sym
;
2088 struct internal_syment sub_sym
;
2089 union internal_auxent sub_aux
;
2090 struct pending
*osyms
, *syms
;
2094 int unsigned_enum
= 1;
2096 type
= coff_alloc_type (index
);
2097 if (within_function
)
2098 symlist
= &local_symbols
;
2100 symlist
= &file_symbols
;
2102 o_nsyms
= osyms
? osyms
->nsyms
: 0;
2104 while (!done
&& symnum
< lastsym
&& symnum
< nlist_nsyms_global
)
2106 read_one_sym (ms
, &sub_sym
, &sub_aux
);
2108 name
= EXTERNAL_NAME (name
, current_objfile
->obfd
);
2110 switch (ms
->c_sclass
)
2113 sym
= (struct symbol
*) obstack_alloc
2114 (¤t_objfile
->symbol_obstack
,
2115 sizeof (struct symbol
));
2116 memset (sym
, 0, sizeof (struct symbol
));
2119 obsavestring (name
, strlen (name
),
2120 ¤t_objfile
->symbol_obstack
);
2121 SYMBOL_CLASS (sym
) = LOC_CONST
;
2122 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
2123 SYMBOL_VALUE (sym
) = ms
->c_value
;
2124 add_symbol_to_list (sym
, symlist
);
2129 /* Sometimes the linker (on 386/ix 2.0.2 at least) screws
2130 up the count of how many symbols to read. So stop
2137 /* Now fill in the fields of the type-structure. */
2140 TYPE_LENGTH (type
) = length
;
2142 TYPE_LENGTH (type
) = TARGET_INT_BIT
/ TARGET_CHAR_BIT
; /* Assume ints */
2143 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
2144 TYPE_NFIELDS (type
) = nsyms
;
2145 TYPE_FIELDS (type
) = (struct field
*)
2146 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
2148 /* Find the symbols for the values and put them into the type.
2149 The symbols can be found in the symlist that we put them on
2150 to cause them to be defined. osyms contains the old value
2151 of that symlist; everything up to there was defined by us. */
2152 /* Note that we preserve the order of the enum constants, so
2153 that in something like "enum {FOO, LAST_THING=FOO}" we print
2154 FOO, not LAST_THING. */
2156 for (syms
= *symlist
, n
= 0; syms
; syms
= syms
->next
)
2162 for (; j
< syms
->nsyms
; j
++,n
++)
2164 struct symbol
*xsym
= syms
->symbol
[j
];
2165 SYMBOL_TYPE (xsym
) = type
;
2166 TYPE_FIELD_NAME (type
, n
) = SYMBOL_NAME (xsym
);
2167 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (xsym
);
2168 if (SYMBOL_VALUE (xsym
) < 0)
2170 TYPE_FIELD_BITSIZE (type
, n
) = 0;
2177 TYPE_FLAGS (type
) |= TYPE_FLAG_UNSIGNED
;
2182 /* Register our ability to parse symbols for coff BFD files. */
2184 static struct sym_fns coff_sym_fns
=
2186 bfd_target_coff_flavour
,
2187 coff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2188 coff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2189 coff_symfile_read
, /* sym_read: read a symbol file into symtab */
2190 coff_symfile_finish
, /* sym_finish: finished with file, cleanup */
2191 default_symfile_offsets
,
2192 /* sym_offsets: xlate external to internal form */
2193 NULL
/* next: pointer to next struct sym_fns */
2197 _initialize_coffread ()
2199 add_symtab_fns (&coff_sym_fns
);