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 /* FIXME: dubious. Why can't we use something normal like
690 bfd_get_section_contents? */
691 bfd_seek (abfd
, abfd
->where
, 0);
693 stabstrsize
= bfd_section_size (abfd
, info
->stabstrsect
);
695 coffstab_build_psymtabs (objfile
,
698 info
->textaddr
, info
->textsize
,
700 info
->stabstrsect
->filepos
, stabstrsize
);
703 do_cleanups (back_to
);
707 coff_new_init (ignore
)
708 struct objfile
*ignore
;
712 /* Perform any local cleanups required when we are done with a particular
713 objfile. I.E, we are in the process of discarding all symbol information
714 for an objfile, freeing up all memory held for it, and unlinking the
715 objfile struct from the global list of known objfiles. */
718 coff_symfile_finish (objfile
)
719 struct objfile
*objfile
;
721 if (objfile
-> sym_private
!= NULL
)
723 mfree (objfile
-> md
, objfile
-> sym_private
);
728 /* Given pointers to a symbol table in coff style exec file,
729 analyze them and create struct symtab's describing the symbols.
730 NSYMS is the number of symbols in the symbol table.
731 We read them one at a time using read_one_sym (). */
734 coff_symtab_read (symtab_offset
, nsyms
, section_offsets
, objfile
)
737 struct section_offsets
*section_offsets
;
738 struct objfile
*objfile
;
740 register struct context_stack
*new;
741 struct coff_symbol coff_symbol
;
742 register struct coff_symbol
*cs
= &coff_symbol
;
743 static struct internal_syment main_sym
;
744 static union internal_auxent main_aux
;
745 struct coff_symbol fcn_cs_saved
;
746 static struct internal_syment fcn_sym_saved
;
747 static union internal_auxent fcn_aux_saved
;
749 /* A .file is open. */
750 int in_source_file
= 0;
751 int next_file_symnum
= -1;
752 /* Name of the current file. */
753 char *filestring
= "";
755 int fcn_first_line
= 0;
756 int fcn_last_line
= 0;
757 int fcn_start_addr
= 0;
758 long fcn_line_ptr
= 0;
762 /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous....
763 it's hard to know I've really worked around it. The fix should be
764 harmless, anyway). The symptom of the bug is that the first
765 fread (in read_one_sym), will (in my example) actually get data
766 from file offset 268, when the fseek was to 264 (and ftell shows
767 264). This causes all hell to break loose. I was unable to
768 reproduce this on a short test program which operated on the same
769 file, performing (I think) the same sequence of operations.
771 It stopped happening when I put in this (former) rewind().
773 FIXME: Find out if this has been reported to Sun, whether it has
774 been fixed in a later release, etc. */
776 bfd_seek (objfile
->obfd
, 0, 0);
778 /* Position to read the symbol table. */
779 val
= bfd_seek (objfile
->obfd
, (long) symtab_offset
, 0);
781 perror_with_name (objfile
->name
);
783 current_objfile
= objfile
;
784 nlist_bfd_global
= objfile
->obfd
;
785 nlist_nsyms_global
= nsyms
;
786 last_source_file
= NULL
;
787 memset (opaque_type_chain
, 0, sizeof opaque_type_chain
);
789 if (type_vector
) /* Get rid of previous one */
790 free ((PTR
) type_vector
);
791 type_vector_length
= 160;
792 type_vector
= (struct type
**)
793 xmalloc (type_vector_length
* sizeof (struct type
*));
794 memset (type_vector
, 0, type_vector_length
* sizeof (struct type
*));
796 coff_start_symtab ("");
799 while (symnum
< nsyms
)
801 QUIT
; /* Make this command interruptable. */
803 read_one_sym (cs
, &main_sym
, &main_aux
);
805 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
807 if (last_source_file
)
808 coff_end_symtab (objfile
);
810 coff_start_symtab ("_globals_");
811 complete_symtab ("_globals_", 0, 0);
812 /* done with all files, everything from here on out is globals */
815 /* Special case for file with type declarations only, no text. */
816 if (!last_source_file
&& SDB_TYPE (cs
->c_type
)
817 && cs
->c_secnum
== N_DEBUG
)
818 complete_symtab (filestring
, 0, 0);
820 /* Typedefs should not be treated as symbol definitions. */
821 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
823 /* Record all functions -- external and static -- in minsyms. */
824 tmpaddr
= cs
->c_value
+ ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
825 record_minimal_symbol (cs
->c_name
, tmpaddr
, mst_text
, objfile
);
827 fcn_line_ptr
= main_aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
828 fcn_start_addr
= tmpaddr
;
830 fcn_sym_saved
= main_sym
;
831 fcn_aux_saved
= main_aux
;
835 switch (cs
->c_sclass
)
844 complain (&bad_sclass_complaint
, cs
->c_name
);
848 /* c_value field contains symnum of next .file entry in table
849 or symnum of first global after last .file. */
850 next_file_symnum
= cs
->c_value
;
852 filestring
= coff_getfilename (&main_aux
);
856 /* Complete symbol table for last object file
857 containing debugging information. */
858 if (last_source_file
)
860 coff_end_symtab (objfile
);
861 coff_start_symtab (filestring
);
866 /* C_LABEL is used for labels and static functions. Including
867 it here allows gdb to see static functions when no debug
868 info is available. */
870 /* However, labels within a function can make weird backtraces,
871 so filter them out (from phdm@macqel.be). */
877 case C_THUMBSTATFUNC
:
878 if (cs
->c_name
[0] == '.')
880 if (STREQ (cs
->c_name
, ".text")) {
881 /* FIXME: don't wire in ".text" as section name
883 /* Check for in_source_file deals with case of
884 a file with debugging symbols
885 followed by a later file with no symbols. */
887 complete_symtab (filestring
,
888 cs
->c_value
+ ANOFFSET (section_offsets
, SECT_OFF_TEXT
),
889 main_aux
.x_scn
.x_scnlen
);
892 /* flush rest of '.' symbols */
895 else if (!SDB_TYPE (cs
->c_type
)
896 && cs
->c_name
[0] == 'L'
897 && (strncmp (cs
->c_name
, "LI%", 3) == 0
898 || strncmp (cs
->c_name
, "LF%", 3) == 0
899 || strncmp (cs
->c_name
,"LC%",3) == 0
900 || strncmp (cs
->c_name
,"LP%",3) == 0
901 || strncmp (cs
->c_name
,"LPB%",4) == 0
902 || strncmp (cs
->c_name
,"LBB%",4) == 0
903 || strncmp (cs
->c_name
,"LBE%",4) == 0
904 || strncmp (cs
->c_name
,"LPBX%",5) == 0))
905 /* At least on a 3b1, gcc generates swbeg and string labels
906 that look like this. Ignore them. */
908 /* fall in for static symbols that don't start with '.' */
913 /* Record it in the minimal symbols regardless of
914 SDB_TYPE. This parallels what we do for other debug
915 formats, and probably is needed to make
916 print_address_symbolic work right without the (now
917 gone) "set fast-symbolic-addr off" kludge. */
919 /* FIXME: should use mst_abs, and not relocate, if absolute. */
920 enum minimal_symbol_type ms_type
;
923 if (cs
->c_secnum
== N_UNDEF
)
925 /* This is a common symbol. See if the target
926 environment knows where it has been relocated to. */
928 if (target_lookup_symbol (cs
->c_name
, &reladdr
))
930 /* Error in lookup; ignore symbol. */
934 /* The address has already been relocated; make sure that
935 objfile_relocate doesn't relocate it again. */
937 ms_type
= cs
->c_sclass
== C_EXT
938 || cs
->c_sclass
== C_THUMBEXT
?
939 mst_bss
: mst_file_bss
;
943 sec
= cs_to_section (cs
, objfile
);
944 tmpaddr
= cs
->c_value
;
945 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXTFUNC
946 || cs
->c_sclass
== C_THUMBEXT
)
947 tmpaddr
+= ANOFFSET (section_offsets
, sec
);
952 case SECT_OFF_RODATA
:
954 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXTFUNC
955 || cs
->c_sclass
== C_THUMBEXT
?
956 mst_text
: mst_file_text
;
957 #ifdef SMASH_TEXT_ADDRESS
958 if (tmpaddr
& 1) /* FIXME: delete this line */
959 SMASH_TEXT_ADDRESS (tmpaddr
);
964 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
?
965 mst_data
: mst_file_data
;
969 cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_THUMBEXT
?
970 mst_data
: mst_file_data
;
973 ms_type
= mst_unknown
;
978 if (cs
->c_name
[0] != '@' /* Skip tdesc symbols */)
980 struct minimal_symbol
*msym
;
982 msym
= prim_record_minimal_symbol_and_info
983 (cs
->c_name
, tmpaddr
, ms_type
, (char *)cs
->c_sclass
, sec
,
985 #ifdef COFF_MAKE_MSYMBOL_SPECIAL
987 COFF_MAKE_MSYMBOL_SPECIAL(cs
->c_sclass
, msym
);
990 if (SDB_TYPE (cs
->c_type
))
993 sym
= process_coff_symbol
994 (cs
, &main_aux
, section_offsets
, objfile
);
995 SYMBOL_VALUE (sym
) = tmpaddr
;
996 SYMBOL_SECTION (sym
) = sec
;
1002 if (STREQ (cs
->c_name
, ".bf"))
1004 within_function
= 1;
1006 /* value contains address of first non-init type code */
1007 /* main_aux.x_sym.x_misc.x_lnsz.x_lnno
1008 contains line number of '{' } */
1009 if (cs
->c_naux
!= 1)
1010 complain (&bf_no_aux_complaint
, cs
->c_symnum
);
1011 fcn_first_line
= main_aux
.x_sym
.x_misc
.x_lnsz
.x_lnno
;
1013 /* Might want to check that locals are 0 and
1014 context_stack_depth is zero, and complain if not. */
1017 new = push_context (depth
, fcn_start_addr
);
1018 fcn_cs_saved
.c_name
= getsymname (&fcn_sym_saved
);
1020 process_coff_symbol (&fcn_cs_saved
, &fcn_aux_saved
,
1021 section_offsets
, objfile
);
1022 record_line (current_subfile
, fcn_first_line
, cs
->c_value
);
1024 else if (STREQ (cs
->c_name
, ".ef"))
1026 /* the value of .ef is the address of epilogue code;
1027 not useful for gdb. */
1028 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1029 contains number of lines to '}' */
1031 if (context_stack_depth
<= 0)
1032 { /* We attempted to pop an empty context stack */
1033 complain (&ef_stack_complaint
, cs
->c_symnum
);
1034 within_function
= 0;
1038 new = pop_context ();
1039 /* Stack must be empty now. */
1040 if (context_stack_depth
> 0 || new == NULL
)
1042 complain (&ef_complaint
, cs
->c_symnum
);
1043 within_function
= 0;
1046 if (cs
->c_naux
!= 1)
1048 complain (&ef_no_aux_complaint
, cs
->c_symnum
);
1049 fcn_last_line
= 0x7FFFFFFF;
1053 fcn_last_line
= main_aux
.x_sym
.x_misc
.x_lnsz
.x_lnno
;
1055 enter_linenos (fcn_line_ptr
, fcn_first_line
, fcn_last_line
,
1058 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1060 #if defined (FUNCTION_EPILOGUE_SIZE)
1061 /* This macro should be defined only on
1063 fcn_aux_saved.x_sym.x_misc.x_fsize
1064 field is always zero.
1065 So use the .bf record information that
1066 points to the epilogue and add the size
1069 + FUNCTION_EPILOGUE_SIZE
1070 + ANOFFSET (section_offsets
, SECT_OFF_TEXT
),
1072 fcn_cs_saved
.c_value
1073 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1074 + ANOFFSET (section_offsets
, SECT_OFF_TEXT
),
1078 within_function
= 0;
1083 if (STREQ (cs
->c_name
, ".bb"))
1085 tmpaddr
= cs
->c_value
;
1086 tmpaddr
+= ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1087 push_context (++depth
, tmpaddr
);
1089 else if (STREQ (cs
->c_name
, ".eb"))
1091 if (context_stack_depth
<= 0)
1092 { /* We attempted to pop an empty context stack */
1093 complain (&eb_stack_complaint
, cs
->c_symnum
);
1097 new = pop_context ();
1098 if (depth
-- != new->depth
)
1100 complain (&eb_complaint
, symnum
);
1103 if (local_symbols
&& context_stack_depth
> 0)
1106 cs
->c_value
+ ANOFFSET (section_offsets
, SECT_OFF_TEXT
);
1107 /* Make a block for the local symbols within. */
1108 finish_block (0, &local_symbols
, new->old_blocks
,
1109 new->start_addr
, tmpaddr
, objfile
);
1111 /* Now pop locals of block just finished. */
1112 local_symbols
= new->locals
;
1117 process_coff_symbol (cs
, &main_aux
, section_offsets
, objfile
);
1122 if (last_source_file
)
1123 coff_end_symtab (objfile
);
1125 /* Patch up any opaque types (references to types that are not defined
1126 in the file where they are referenced, e.g. "struct foo *bar"). */
1127 ALL_OBJFILE_SYMTABS (objfile
, s
)
1128 patch_opaque_types (s
);
1130 current_objfile
= NULL
;
1133 /* Routines for reading headers and symbols from executable. */
1135 /* Read the next symbol, swap it, and return it in both internal_syment
1136 form, and coff_symbol form. Also return its first auxent, if any,
1137 in internal_auxent form, and skip any other auxents. */
1140 read_one_sym (cs
, sym
, aux
)
1141 register struct coff_symbol
*cs
;
1142 register struct internal_syment
*sym
;
1143 register union internal_auxent
*aux
;
1147 cs
->c_symnum
= symnum
;
1148 bfd_read (temp_sym
, local_symesz
, 1, nlist_bfd_global
);
1149 bfd_coff_swap_sym_in (symfile_bfd
, temp_sym
, (char *)sym
);
1150 cs
->c_naux
= sym
->n_numaux
& 0xff;
1151 if (cs
->c_naux
>= 1)
1153 bfd_read (temp_aux
, local_auxesz
, 1, nlist_bfd_global
);
1154 bfd_coff_swap_aux_in (symfile_bfd
, temp_aux
, sym
->n_type
, sym
->n_sclass
,
1155 0, cs
->c_naux
, (char *)aux
);
1156 /* If more than one aux entry, read past it (only the first aux
1158 for (i
= 1; i
< cs
->c_naux
; i
++)
1159 bfd_read (temp_aux
, local_auxesz
, 1, nlist_bfd_global
);
1161 cs
->c_name
= getsymname (sym
);
1162 cs
->c_value
= sym
->n_value
;
1163 cs
->c_sclass
= (sym
->n_sclass
& 0xff);
1164 cs
->c_secnum
= sym
->n_scnum
;
1165 cs
->c_type
= (unsigned) sym
->n_type
;
1166 if (!SDB_TYPE (cs
->c_type
))
1170 if (cs
->c_sclass
& 128)
1171 printf("thumb symbol %s, class 0x%x\n", cs
->c_name
, cs
->c_sclass
);
1174 symnum
+= 1 + cs
->c_naux
;
1176 /* The PE file format stores symbol values as offsets within the
1177 section, rather than as absolute addresses. We correct that
1178 here, if the symbol has an appropriate storage class. FIXME: We
1179 should use BFD to read the symbols, rather than duplicating the
1183 switch (cs
->c_sclass
)
1187 case C_THUMBEXTFUNC
:
1192 case C_THUMBSTATFUNC
:
1198 if (cs
->c_secnum
!= 0)
1199 cs
->c_value
+= cs_section_address (cs
, symfile_bfd
);
1205 /* Support for string table handling */
1207 static char *stringtab
= NULL
;
1210 init_stringtab (abfd
, offset
)
1216 unsigned char lengthbuf
[4];
1220 /* If the file is stripped, the offset might be zero, indicating no
1221 string table. Just return with `stringtab' set to null. */
1225 if (bfd_seek (abfd
, offset
, 0) < 0)
1228 val
= bfd_read ((char *)lengthbuf
, sizeof lengthbuf
, 1, abfd
);
1229 length
= bfd_h_get_32 (symfile_bfd
, lengthbuf
);
1231 /* If no string table is needed, then the file may end immediately
1232 after the symbols. Just return with `stringtab' set to null. */
1233 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1236 stringtab
= (char *) xmalloc (length
);
1237 /* This is in target format (probably not very useful, and not currently
1238 used), not host format. */
1239 memcpy (stringtab
, lengthbuf
, sizeof lengthbuf
);
1240 if (length
== sizeof length
) /* Empty table -- just the count */
1243 val
= bfd_read (stringtab
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, 1, abfd
);
1244 if (val
!= length
- sizeof lengthbuf
|| stringtab
[length
- 1] != '\0')
1259 getsymname (symbol_entry
)
1260 struct internal_syment
*symbol_entry
;
1262 static char buffer
[SYMNMLEN
+1];
1265 if (symbol_entry
->_n
._n_n
._n_zeroes
== 0)
1267 /* FIXME: Probably should be detecting corrupt symbol files by
1268 seeing whether offset points to within the stringtab. */
1269 result
= stringtab
+ symbol_entry
->_n
._n_n
._n_offset
;
1273 strncpy (buffer
, symbol_entry
->_n
._n_name
, SYMNMLEN
);
1274 buffer
[SYMNMLEN
] = '\0';
1280 /* Extract the file name from the aux entry of a C_FILE symbol. Return
1281 only the last component of the name. Result is in static storage and
1282 is only good for temporary use. */
1285 coff_getfilename (aux_entry
)
1286 union internal_auxent
*aux_entry
;
1288 static char buffer
[BUFSIZ
];
1289 register char *temp
;
1292 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1293 strcpy (buffer
, stringtab
+ aux_entry
->x_file
.x_n
.x_offset
);
1296 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1297 buffer
[FILNMLEN
] = '\0';
1301 /* FIXME: We should not be throwing away the information about what
1302 directory. It should go into dirname of the symtab, or some such
1304 if ((temp
= strrchr (result
, '/')) != NULL
)
1309 /* Support for line number handling. */
1311 static char *linetab
= NULL
;
1312 static long linetab_offset
;
1313 static unsigned long linetab_size
;
1315 /* Read in all the line numbers for fast lookups later. Leave them in
1316 external (unswapped) format in memory; we'll swap them as we enter
1317 them into GDB's data structures. */
1320 init_lineno (abfd
, offset
, size
)
1327 linetab_offset
= offset
;
1328 linetab_size
= size
;
1335 if (bfd_seek (abfd
, offset
, 0) < 0)
1338 /* Allocate the desired table, plus a sentinel */
1339 linetab
= (char *) xmalloc (size
+ local_linesz
);
1341 val
= bfd_read (linetab
, size
, 1, abfd
);
1345 /* Terminate it with an all-zero sentinel record */
1346 memset (linetab
+ size
, 0, local_linesz
);
1359 #if !defined (L_LNNO32)
1360 #define L_LNNO32(lp) ((lp)->l_lnno)
1364 enter_linenos (file_offset
, first_line
, last_line
, section_offsets
)
1366 register int first_line
;
1367 register int last_line
;
1368 struct section_offsets
*section_offsets
;
1370 register char *rawptr
;
1371 struct internal_lineno lptr
;
1375 if (file_offset
< linetab_offset
)
1377 complain (&lineno_complaint
, file_offset
);
1378 if (file_offset
> linetab_size
) /* Too big to be an offset? */
1380 file_offset
+= linetab_offset
; /* Try reading at that linetab offset */
1383 rawptr
= &linetab
[file_offset
- linetab_offset
];
1385 /* skip first line entry for each function */
1386 rawptr
+= local_linesz
;
1387 /* line numbers start at one for the first line of the function */
1391 bfd_coff_swap_lineno_in (symfile_bfd
, rawptr
, &lptr
);
1392 rawptr
+= local_linesz
;
1393 /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */
1394 if (L_LNNO32 (&lptr
) && L_LNNO32 (&lptr
) <= last_line
)
1395 record_line (current_subfile
, first_line
+ L_LNNO32 (&lptr
),
1397 + ANOFFSET (section_offsets
, SECT_OFF_TEXT
));
1404 patch_type (type
, real_type
)
1406 struct type
*real_type
;
1408 register struct type
*target
= TYPE_TARGET_TYPE (type
);
1409 register struct type
*real_target
= TYPE_TARGET_TYPE (real_type
);
1410 int field_size
= TYPE_NFIELDS (real_target
) * sizeof (struct field
);
1412 TYPE_LENGTH (target
) = TYPE_LENGTH (real_target
);
1413 TYPE_NFIELDS (target
) = TYPE_NFIELDS (real_target
);
1414 TYPE_FIELDS (target
) = (struct field
*) TYPE_ALLOC (target
, field_size
);
1416 memcpy (TYPE_FIELDS (target
), TYPE_FIELDS (real_target
), field_size
);
1418 if (TYPE_NAME (real_target
))
1420 if (TYPE_NAME (target
))
1421 free (TYPE_NAME (target
));
1422 TYPE_NAME (target
) = concat (TYPE_NAME (real_target
), NULL
);
1426 /* Patch up all appropriate typedef symbols in the opaque_type_chains
1427 so that they can be used to print out opaque data structures properly. */
1430 patch_opaque_types (s
)
1433 register struct block
*b
;
1435 register struct symbol
*real_sym
;
1437 /* Go through the per-file symbols only */
1438 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
1439 for (i
= BLOCK_NSYMS (b
) - 1; i
>= 0; i
--)
1441 /* Find completed typedefs to use to fix opaque ones.
1442 Remove syms from the chain when their types are stored,
1443 but search the whole chain, as there may be several syms
1444 from different files with the same name. */
1445 real_sym
= BLOCK_SYM (b
, i
);
1446 if (SYMBOL_CLASS (real_sym
) == LOC_TYPEDEF
&&
1447 SYMBOL_NAMESPACE (real_sym
) == VAR_NAMESPACE
&&
1448 TYPE_CODE (SYMBOL_TYPE (real_sym
)) == TYPE_CODE_PTR
&&
1449 TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym
))) != 0)
1451 register char *name
= SYMBOL_NAME (real_sym
);
1452 register int hash
= hashname (name
);
1453 register struct symbol
*sym
, *prev
;
1456 for (sym
= opaque_type_chain
[hash
]; sym
;)
1458 if (name
[0] == SYMBOL_NAME (sym
)[0] &&
1459 STREQ (name
+ 1, SYMBOL_NAME (sym
) + 1))
1463 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
1467 opaque_type_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
1470 patch_type (SYMBOL_TYPE (sym
), SYMBOL_TYPE (real_sym
));
1474 sym
= SYMBOL_VALUE_CHAIN (prev
);
1478 sym
= opaque_type_chain
[hash
];
1484 sym
= SYMBOL_VALUE_CHAIN (sym
);
1491 static struct symbol
*
1492 process_coff_symbol (cs
, aux
, section_offsets
, objfile
)
1493 register struct coff_symbol
*cs
;
1494 register union internal_auxent
*aux
;
1495 struct section_offsets
*section_offsets
;
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 (section_offsets
, SECT_OFF_TEXT
);
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 (section_offsets
, SECT_OFF_TEXT
);
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 (section_offsets
, SECT_OFF_TEXT
);
1558 if (within_function
) {
1559 /* Static symbol of local scope */
1560 add_symbol_to_list (sym
, &local_symbols
);
1563 /* Static symbol at top level of file */
1564 add_symbol_to_list (sym
, &file_symbols
);
1568 #ifdef C_GLBLREG /* AMD coff */
1572 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1573 SYMBOL_VALUE (sym
) = SDB_REG_TO_REGNUM(cs
->c_value
);
1574 add_symbol_to_list (sym
, &local_symbols
);
1582 SYMBOL_CLASS (sym
) = LOC_ARG
;
1583 add_symbol_to_list (sym
, &local_symbols
);
1584 #if !defined (BELIEVE_PCC_PROMOTION)
1585 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
1587 /* If PCC says a parameter is a short or a char,
1588 aligned on an int boundary, realign it to the
1589 "little end" of the int. */
1590 struct type
*temptype
;
1591 temptype
= lookup_fundamental_type (current_objfile
,
1593 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) < TYPE_LENGTH (temptype
)
1594 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
1595 && 0 == SYMBOL_VALUE (sym
) % TYPE_LENGTH (temptype
))
1597 SYMBOL_VALUE (sym
) +=
1598 TYPE_LENGTH (temptype
)
1599 - TYPE_LENGTH (SYMBOL_TYPE (sym
));
1606 SYMBOL_CLASS (sym
) = LOC_REGPARM
;
1607 SYMBOL_VALUE (sym
) = SDB_REG_TO_REGNUM(cs
->c_value
);
1608 add_symbol_to_list (sym
, &local_symbols
);
1609 #if !defined (BELIEVE_PCC_PROMOTION)
1610 /* FIXME: This should retain the current type, since it's just
1611 a register value. gnu@adobe, 26Feb93 */
1613 /* If PCC says a parameter is a short or a char,
1614 it is really an int. */
1615 struct type
*temptype
;
1617 lookup_fundamental_type (current_objfile
, FT_INTEGER
);
1618 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) < TYPE_LENGTH (temptype
)
1619 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
1622 (TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
1623 ? lookup_fundamental_type (current_objfile
,
1624 FT_UNSIGNED_INTEGER
)
1632 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1633 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1635 /* If type has no name, give it one */
1636 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1638 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1639 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1641 /* If we are giving a name to a type such as "pointer to
1642 foo" or "function returning foo", we better not set
1643 the TYPE_NAME. If the program contains "typedef char
1644 *caddr_t;", we don't want all variables of type char
1645 * to print as caddr_t. This is not just a
1646 consequence of GDB's type management; CC and GCC (at
1647 least through version 2.4) both output variables of
1648 either type char * or caddr_t with the type
1649 refering to the C_TPDEF symbol for caddr_t. If a future
1650 compiler cleans this up it GDB is not ready for it
1651 yet, but if it becomes ready we somehow need to
1652 disable this check (without breaking the PCC/GCC2.4
1657 Fortunately, this check seems not to be necessary
1658 for anything except pointers or functions. */
1662 TYPE_NAME (SYMBOL_TYPE (sym
)) =
1663 concat (SYMBOL_NAME (sym
), NULL
);
1666 /* Ignore vendor section for Harris CX/UX targets. */
1667 else if (cs
->c_name
[0] == '$')
1669 #endif /* CXUX_TARGET */
1671 /* Keep track of any type which points to empty structured type,
1672 so it can be filled from a definition from another file. A
1673 simple forward reference (TYPE_CODE_UNDEF) is not an
1674 empty structured type, though; the forward references
1675 work themselves out via the magic of coff_lookup_type. */
1676 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
&&
1677 TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym
))) == 0 &&
1678 TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym
))) !=
1681 register int i
= hashname (SYMBOL_NAME (sym
));
1683 SYMBOL_VALUE_CHAIN (sym
) = opaque_type_chain
[i
];
1684 opaque_type_chain
[i
] = sym
;
1686 add_symbol_to_list (sym
, &file_symbols
);
1692 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1693 SYMBOL_NAMESPACE (sym
) = STRUCT_NAMESPACE
;
1695 /* Some compilers try to be helpful by inventing "fake"
1696 names for anonymous enums, structures, and unions, like
1697 "~0fake" or ".0fake". Thanks, but no thanks... */
1698 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1699 if (SYMBOL_NAME(sym
) != NULL
1700 && *SYMBOL_NAME(sym
) != '~'
1701 && *SYMBOL_NAME(sym
) != '.')
1702 TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) =
1703 concat (SYMBOL_NAME (sym
), NULL
);
1705 add_symbol_to_list (sym
, &file_symbols
);
1715 /* Decode a coff type specifier; return the type that is meant. */
1717 static struct type
*
1718 decode_type (cs
, c_type
, aux
)
1719 register struct coff_symbol
*cs
;
1720 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 (cs
, c_type
, aux
)
1800 register struct coff_symbol
*cs
;
1801 unsigned int c_type
;
1802 register union internal_auxent
*aux
;
1804 if (aux
->x_sym
.x_tagndx
.l
== 0)
1805 cs
->c_naux
= 0; /* auxent refers to function, not base type */
1807 return decode_type (cs
, DECREF (c_type
), aux
);
1812 static struct type
*
1813 decode_base_type (cs
, c_type
, aux
)
1814 register struct coff_symbol
*cs
;
1815 unsigned int c_type
;
1816 register union internal_auxent
*aux
;
1823 /* shows up with "void (*foo)();" structure members */
1824 return lookup_fundamental_type (current_objfile
, FT_VOID
);
1827 /* DGUX actually defines both T_ARG and T_VOID to the same value. */
1830 /* Shows up in DGUX, I think. Not sure where. */
1831 return lookup_fundamental_type (current_objfile
, FT_VOID
); /* shouldn't show up here */
1837 /* Intel 960 COFF has this symbol and meaning. */
1838 return lookup_fundamental_type (current_objfile
, FT_VOID
);
1842 return lookup_fundamental_type (current_objfile
, FT_CHAR
);
1845 return lookup_fundamental_type (current_objfile
, FT_SHORT
);
1848 return lookup_fundamental_type (current_objfile
, FT_INTEGER
);
1851 if (cs
->c_sclass
== C_FIELD
1852 && aux
->x_sym
.x_misc
.x_lnsz
.x_size
> TARGET_LONG_BIT
)
1853 return lookup_fundamental_type (current_objfile
, FT_LONG_LONG
);
1855 return lookup_fundamental_type (current_objfile
, FT_LONG
);
1858 return lookup_fundamental_type (current_objfile
, FT_FLOAT
);
1861 return lookup_fundamental_type (current_objfile
, FT_DBL_PREC_FLOAT
);
1864 return lookup_fundamental_type (current_objfile
, FT_EXT_PREC_FLOAT
);
1867 if (cs
->c_naux
!= 1)
1869 /* anonymous structure type */
1870 type
= coff_alloc_type (cs
->c_symnum
);
1871 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
1872 TYPE_NAME (type
) = NULL
;
1873 /* This used to set the tag to "<opaque>". But I think setting it
1874 to NULL is right, and the printing code can print it as
1876 TYPE_TAG_NAME (type
) = NULL
;
1877 INIT_CPLUS_SPECIFIC(type
);
1878 TYPE_LENGTH (type
) = 0;
1879 TYPE_FIELDS (type
) = 0;
1880 TYPE_NFIELDS (type
) = 0;
1884 type
= coff_read_struct_type (cs
->c_symnum
,
1885 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1886 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
);
1891 if (cs
->c_naux
!= 1)
1893 /* anonymous union type */
1894 type
= coff_alloc_type (cs
->c_symnum
);
1895 TYPE_NAME (type
) = NULL
;
1896 /* This used to set the tag to "<opaque>". But I think setting it
1897 to NULL is right, and the printing code can print it as
1899 TYPE_TAG_NAME (type
) = NULL
;
1900 INIT_CPLUS_SPECIFIC(type
);
1901 TYPE_LENGTH (type
) = 0;
1902 TYPE_FIELDS (type
) = 0;
1903 TYPE_NFIELDS (type
) = 0;
1907 type
= coff_read_struct_type (cs
->c_symnum
,
1908 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1909 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
);
1911 TYPE_CODE (type
) = TYPE_CODE_UNION
;
1915 if (cs
->c_naux
!= 1)
1917 /* anonymous enum type */
1918 type
= coff_alloc_type (cs
->c_symnum
);
1919 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
1920 TYPE_NAME (type
) = NULL
;
1921 /* This used to set the tag to "<opaque>". But I think setting it
1922 to NULL is right, and the printing code can print it as
1924 TYPE_TAG_NAME (type
) = NULL
;
1925 TYPE_LENGTH (type
) = 0;
1926 TYPE_FIELDS (type
) = 0;
1927 TYPE_NFIELDS(type
) = 0;
1931 type
= coff_read_enum_type (cs
->c_symnum
,
1932 aux
->x_sym
.x_misc
.x_lnsz
.x_size
,
1933 aux
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
);
1938 /* shouldn't show up here */
1942 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_CHAR
);
1945 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_SHORT
);
1948 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_INTEGER
);
1951 if (cs
->c_sclass
== C_FIELD
1952 && aux
->x_sym
.x_misc
.x_lnsz
.x_size
> TARGET_LONG_BIT
)
1953 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_LONG_LONG
);
1955 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_LONG
);
1957 complain (&unexpected_type_complaint
, cs
->c_name
);
1958 return lookup_fundamental_type (current_objfile
, FT_VOID
);
1961 /* This page contains subroutines of read_type. */
1963 /* Read the description of a structure (or union type) and return an
1964 object describing the type. */
1966 static struct type
*
1967 coff_read_struct_type (index
, length
, lastsym
)
1974 struct nextfield
*next
;
1978 register struct type
*type
;
1979 register struct nextfield
*list
= 0;
1980 struct nextfield
*new;
1984 struct coff_symbol member_sym
;
1985 register struct coff_symbol
*ms
= &member_sym
;
1986 struct internal_syment sub_sym
;
1987 union internal_auxent sub_aux
;
1990 type
= coff_alloc_type (index
);
1991 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
1992 INIT_CPLUS_SPECIFIC(type
);
1993 TYPE_LENGTH (type
) = length
;
1995 while (!done
&& symnum
< lastsym
&& symnum
< nlist_nsyms_global
)
1997 read_one_sym (ms
, &sub_sym
, &sub_aux
);
1999 name
= EXTERNAL_NAME (name
, current_objfile
->obfd
);
2001 switch (ms
->c_sclass
)
2006 /* Get space to record the next field's data. */
2007 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
2011 /* Save the data. */
2015 ¤t_objfile
->symbol_obstack
);
2016 FIELD_TYPE (list
->field
) = decode_type (ms
, ms
->c_type
, &sub_aux
);
2017 FIELD_BITPOS (list
->field
) = 8 * ms
->c_value
;
2018 FIELD_BITSIZE (list
->field
) = 0;
2024 /* Get space to record the next field's data. */
2025 new = (struct nextfield
*) alloca (sizeof (struct nextfield
));
2029 /* Save the data. */
2033 ¤t_objfile
->symbol_obstack
);
2034 FIELD_TYPE (list
->field
) = decode_type (ms
, ms
->c_type
, &sub_aux
);
2035 FIELD_BITPOS (list
->field
) = ms
->c_value
;
2036 FIELD_BITSIZE (list
->field
) = sub_aux
.x_sym
.x_misc
.x_lnsz
.x_size
;
2045 /* Now create the vector of fields, and record how big it is. */
2047 TYPE_NFIELDS (type
) = nfields
;
2048 TYPE_FIELDS (type
) = (struct field
*)
2049 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
2051 /* Copy the saved-up fields into the field vector. */
2053 for (n
= nfields
; list
; list
= list
->next
)
2054 TYPE_FIELD (type
, --n
) = list
->field
;
2059 /* Read a definition of an enumeration type,
2060 and create and return a suitable type object.
2061 Also defines the symbols that represent the values of the type. */
2064 static struct type
*
2065 coff_read_enum_type (index
, length
, lastsym
)
2070 register struct symbol
*sym
;
2071 register struct type
*type
;
2074 struct pending
**symlist
;
2075 struct coff_symbol member_sym
;
2076 register struct coff_symbol
*ms
= &member_sym
;
2077 struct internal_syment sub_sym
;
2078 union internal_auxent sub_aux
;
2079 struct pending
*osyms
, *syms
;
2083 int unsigned_enum
= 1;
2085 type
= coff_alloc_type (index
);
2086 if (within_function
)
2087 symlist
= &local_symbols
;
2089 symlist
= &file_symbols
;
2091 o_nsyms
= osyms
? osyms
->nsyms
: 0;
2093 while (!done
&& symnum
< lastsym
&& symnum
< nlist_nsyms_global
)
2095 read_one_sym (ms
, &sub_sym
, &sub_aux
);
2097 name
= EXTERNAL_NAME (name
, current_objfile
->obfd
);
2099 switch (ms
->c_sclass
)
2102 sym
= (struct symbol
*) obstack_alloc
2103 (¤t_objfile
->symbol_obstack
,
2104 sizeof (struct symbol
));
2105 memset (sym
, 0, sizeof (struct symbol
));
2108 obsavestring (name
, strlen (name
),
2109 ¤t_objfile
->symbol_obstack
);
2110 SYMBOL_CLASS (sym
) = LOC_CONST
;
2111 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
2112 SYMBOL_VALUE (sym
) = ms
->c_value
;
2113 add_symbol_to_list (sym
, symlist
);
2118 /* Sometimes the linker (on 386/ix 2.0.2 at least) screws
2119 up the count of how many symbols to read. So stop
2126 /* Now fill in the fields of the type-structure. */
2129 TYPE_LENGTH (type
) = length
;
2131 TYPE_LENGTH (type
) = TARGET_INT_BIT
/ TARGET_CHAR_BIT
; /* Assume ints */
2132 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
2133 TYPE_NFIELDS (type
) = nsyms
;
2134 TYPE_FIELDS (type
) = (struct field
*)
2135 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
2137 /* Find the symbols for the values and put them into the type.
2138 The symbols can be found in the symlist that we put them on
2139 to cause them to be defined. osyms contains the old value
2140 of that symlist; everything up to there was defined by us. */
2141 /* Note that we preserve the order of the enum constants, so
2142 that in something like "enum {FOO, LAST_THING=FOO}" we print
2143 FOO, not LAST_THING. */
2145 for (syms
= *symlist
, n
= 0; syms
; syms
= syms
->next
)
2151 for (; j
< syms
->nsyms
; j
++,n
++)
2153 struct symbol
*xsym
= syms
->symbol
[j
];
2154 SYMBOL_TYPE (xsym
) = type
;
2155 TYPE_FIELD_NAME (type
, n
) = SYMBOL_NAME (xsym
);
2156 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (xsym
);
2157 if (SYMBOL_VALUE (xsym
) < 0)
2159 TYPE_FIELD_BITSIZE (type
, n
) = 0;
2166 TYPE_FLAGS (type
) |= TYPE_FLAG_UNSIGNED
;
2171 /* Register our ability to parse symbols for coff BFD files. */
2173 static struct sym_fns coff_sym_fns
=
2175 bfd_target_coff_flavour
,
2176 coff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2177 coff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2178 coff_symfile_read
, /* sym_read: read a symbol file into symtab */
2179 coff_symfile_finish
, /* sym_finish: finished with file, cleanup */
2180 default_symfile_offsets
,
2181 /* sym_offsets: xlate external to internal form */
2182 NULL
/* next: pointer to next struct sym_fns */
2186 _initialize_coffread ()
2188 add_symtab_fns (&coff_sym_fns
);