1 /* Read AIXcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-1991 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
26 /* Native only: Need struct tbtable in <sys/debug.h>. */
28 /* AIX COFF names have a preceeding dot `.' */
29 #define NAMES_HAVE_DOT 1
31 #include <sys/types.h>
36 #include <sys/param.h>
41 #include <sys/debug.h>
49 #include "coff/internal.h" /* FIXME, internal data from BFD */
50 #include "libcoff.h" /* FIXME, internal data from BFD */
51 #include "coff/rs6000.h" /* FIXME, raw file-format guts of xcoff */
54 /* Define this if you want gdb use the old xcoff symbol processing. This
55 way it won't use common `define_symbol()' function and Sun dbx stab
56 string grammar. And likely it won't be able to do G++ debugging. */
58 /* #define NO_DEFINE_SYMBOL 1 */
60 /* Define this if you want gdb to ignore typdef stabs. This was needed for
61 one of Transarc, to reduce the size of the symbol table. Types won't be
62 recognized, but tag names will be. */
64 /* #define NO_TYPEDEFS 1 */
66 /* Simplified internal version of coff symbol table information */
70 int c_symnum
; /* symbol number of this entry */
71 int c_nsyms
; /* 0 if syment only, 1 if syment + auxent */
78 /* The COFF line table, in raw form. */
79 static char *linetab
= NULL
; /* Its actual contents */
80 static long linetab_offset
; /* Its offset in the file */
81 static unsigned long linetab_size
; /* Its size */
83 /* last function's saved coff symbol `cs' */
85 static struct coff_symbol fcn_cs_saved
;
87 static bfd
*symfile_bfd
;
89 /* Core address of start and end of text of current source file.
90 This is calculated from the first function seen after a C_FILE
94 static CORE_ADDR cur_src_end_addr
;
96 /* Core address of the end of the first object file. */
98 static CORE_ADDR first_object_file_end
;
100 /* pointer to the string table */
103 /* length of the string table */
104 static int strtbl_len
;
106 /* pointer to debug section */
107 static char *debugsec
;
109 /* pointer to the a.out symbol table */
112 /* initial symbol-table-debug-string vector length */
114 #define INITIAL_STABVECTOR_LENGTH 40
116 struct pending_stabs
*global_stabs
;
119 /* Nonzero if within a function (so symbols should be local,
120 if nothing says specifically). */
124 /* Local variables that hold the shift and mask values for the
125 COFF file that we are currently reading. These come back to us
126 from BFD, and are referenced by their macro names, as well as
127 internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
128 macros from ../internalcoff.h . */
130 static unsigned local_n_btshft
;
131 static unsigned local_n_tmask
;
134 #define N_BTSHFT local_n_btshft
136 #define N_TMASK local_n_tmask
138 /* Local variables that hold the sizes in the file of various COFF structures.
139 (We only need to know this to read them from the file -- BFD will then
140 translate the data in them, into `internal_xxx' structs in the right
141 byte order, alignment, etc.) */
143 static unsigned local_symesz
;
146 /* coff_symfile_init()
147 is the coff-specific initialization routine for reading symbols.
148 It is passed a struct sym_fns which contains, among other things,
149 the BFD for the file whose symbols are being read, and a slot for
150 a pointer to "private data" which we fill with cookies and other
151 treats for coff_symfile_read().
153 We will only be called if this is a COFF or COFF-like file.
154 BFD handles figuring out the format of the file, and code in symtab.c
155 uses BFD's determination to vector to us.
157 The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
159 struct coff_symfile_info
{
160 file_ptr min_lineno_offset
; /* Where in file lowest line#s are */
161 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file */
166 enter_line_range
PARAMS ((struct subfile
*, unsigned, unsigned,
167 CORE_ADDR
, CORE_ADDR
, unsigned *));
170 free_debugsection
PARAMS ((void));
173 init_debugsection
PARAMS ((bfd
*));
176 init_stringtab
PARAMS ((bfd
*, long, struct objfile
*));
179 aixcoff_symfile_init
PARAMS ((struct objfile
*));
182 aixcoff_new_init
PARAMS ((struct objfile
*));
185 aixcoff_symfile_read
PARAMS ((struct objfile
*, CORE_ADDR
, int));
188 aixcoff_symfile_finish
PARAMS ((struct objfile
*));
191 init_lineno
PARAMS ((bfd
*, long, int));
194 find_linenos
PARAMS ((bfd
*, sec_ptr
, PTR
));
197 read_symbol_lineno
PARAMS ((char *, int));
200 read_symbol_nvalue
PARAMS ((char *, int));
202 static struct symbol
*
203 process_xcoff_symbol
PARAMS ((struct coff_symbol
*, struct objfile
*));
206 read_xcoff_symtab
PARAMS ((struct objfile
*, int));
209 add_stab_to_list
PARAMS ((char *, struct pending_stabs
**));
212 sort_syms
PARAMS ((void));
215 compare_symbols
PARAMS ((const void *, const void *));
217 /* Call sort_syms to sort alphabetically
218 the symbols of each block of each symtab. */
221 compare_symbols (s1p
, s2p
)
225 /* Names that are less should come first. */
226 register struct symbol
**s1
= (struct symbol
**) s1p
;
227 register struct symbol
**s2
= (struct symbol
**) s2p
;
228 register int namediff
= strcmp (SYMBOL_NAME (*s1
), SYMBOL_NAME (*s2
));
232 /* For symbols of the same name, registers should come first. */
233 return ((SYMBOL_CLASS (*s2
) == LOC_REGISTER
)
234 - (SYMBOL_CLASS (*s1
) == LOC_REGISTER
));
238 /* Sort a vector of symbols by their value. */
243 register struct symtab
*s
;
244 register struct objfile
*objfile
;
246 register struct blockvector
*bv
;
247 register struct block
*b
;
249 for (objfile
= object_files
; objfile
!= NULL
; objfile
= objfile
-> next
)
251 for (s
= objfile
-> symtabs
; s
!= NULL
; s
= s
-> next
)
253 bv
= BLOCKVECTOR (s
);
254 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
255 for (i
= 0; i
< nbl
; i
++)
257 b
= BLOCKVECTOR_BLOCK (bv
, i
);
258 if (BLOCK_SHOULD_SORT (b
))
260 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
261 sizeof (struct symbol
*), compare_symbols
);
269 /* add a given stab string into given stab vector. */
272 add_stab_to_list (stabname
, stabvector
)
274 struct pending_stabs
**stabvector
;
276 if ( *stabvector
== NULL
) {
277 *stabvector
= (struct pending_stabs
*)
278 xmalloc (sizeof (struct pending_stabs
) +
279 INITIAL_STABVECTOR_LENGTH
* sizeof (char*));
280 (*stabvector
)->count
= 0;
281 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
283 else if ((*stabvector
)->count
>= (*stabvector
)->length
) {
284 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
285 *stabvector
= (struct pending_stabs
*)
286 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
287 (*stabvector
)->length
* sizeof (char*));
289 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
294 /* for all the stabs in a given stab vector, build appropriate types
295 and fix their symbols in given symbol vector. */
298 patch_block_stabs (symbols
, stabs
)
299 struct pending
*symbols
;
300 struct pending_stabs
*stabs
;
307 /* for all the stab entries, find their corresponding symbols and
308 patch their types! */
310 for (ii
=0; ii
< stabs
->count
; ++ii
) {
311 char *name
= stabs
->stab
[ii
];
312 char *pp
= (char*) index (name
, ':');
313 struct symbol
*sym
= find_symbol_in_list (symbols
, name
, pp
-name
);
316 /* printf ("ERROR! stab symbol not found!\n"); */ /* FIXME */
317 /* The above is a false alarm. There are cases the we can have
318 a stab, without its symbol. xlc generates this for the extern
319 definitions in inner blocks. */
324 if (*(pp
-1) == 'F' || *(pp
-1) == 'f')
325 SYMBOL_TYPE (sym
) = lookup_function_type (read_type (&pp
));
327 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
334 /* compare line table entry addresses. */
337 compare_lte (lte1
, lte2
)
338 struct linetable_entry
*lte1
, *lte2
;
340 return lte1
->pc
- lte2
->pc
;
343 /* Give a line table with function entries are marked, arrange its functions
344 in assending order and strip off function entry markers and return it in
345 a newly created table. If the old one is good enough, return the old one. */
347 static struct linetable
*
348 arrange_linetable (oldLineTb
)
349 struct linetable
*oldLineTb
; /* old linetable */
352 newline
, /* new line count */
353 function_count
; /* # of functions */
355 struct linetable_entry
*fentry
; /* function entry vector */
356 int fentry_size
; /* # of function entries */
357 struct linetable
*newLineTb
; /* new line table */
359 #define NUM_OF_FUNCTIONS 20
361 fentry_size
= NUM_OF_FUNCTIONS
;
362 fentry
= (struct linetable_entry
*)
363 malloc (fentry_size
* sizeof (struct linetable_entry
));
365 for (function_count
=0, ii
=0; ii
<oldLineTb
->nitems
; ++ii
) {
367 if (oldLineTb
->item
[ii
].line
== 0) { /* function entry found. */
369 if (function_count
>= fentry_size
) { /* make sure you have room. */
371 fentry
= (struct linetable_entry
*)
372 realloc (fentry
, fentry_size
* sizeof (struct linetable_entry
));
374 fentry
[function_count
].line
= ii
;
375 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
380 if (function_count
== 0) {
384 else if (function_count
> 1)
385 qsort (fentry
, function_count
, sizeof(struct linetable_entry
), compare_lte
);
387 /* allocate a new line table. */
388 newLineTb
= (struct linetable
*) malloc (sizeof (struct linetable
) +
389 (oldLineTb
->nitems
- function_count
) * sizeof (struct linetable_entry
));
391 /* if line table does not start with a function beginning, copy up until
395 if (oldLineTb
->item
[0].line
!= 0)
397 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
398 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
400 /* Now copy function lines one by one. */
402 for (ii
=0; ii
< function_count
; ++ii
) {
403 for (jj
= fentry
[ii
].line
+ 1;
404 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
406 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
409 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
;
415 /* We try to detect the beginning of a compilation unit. That info will
416 be used as an entry in line number recording routines (enter_line_range) */
418 static unsigned first_fun_line_offset
;
419 static unsigned first_fun_bf
;
421 #define mark_first_line(OFFSET, SYMNUM) \
422 if (!first_fun_line_offset) { \
423 first_fun_line_offset = OFFSET; \
424 first_fun_bf = SYMNUM; \
428 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
429 following `IncludeChain'. At the end of each symtab (end_symtab),
430 we will determine if we should create additional symtab's to
431 represent if (the include files. */
434 typedef struct _inclTable
{
435 char *name
; /* include filename */
436 int begin
, end
; /* offsets to the line table */
437 struct subfile
*subfile
;
438 unsigned funStartLine
; /* start line # of its function */
441 #define INITIAL_INCLUDE_TABLE_LENGTH 20
442 static InclTable
*inclTable
; /* global include table */
443 static int inclIndx
; /* last entry to table */
444 static int inclLength
; /* table length */
445 static int inclDepth
; /* nested include depth */
449 record_include_begin (cs
)
450 struct coff_symbol
*cs
;
452 /* In aixcoff, we assume include files cannot be nested (not in .c files
453 of course, but in corresponding .s files.) */
456 fatal ("aix internal: pending include file exists.");
460 /* allocate an include file, or make room for the new entry */
461 if (inclLength
== 0) {
462 inclTable
= (InclTable
*)
463 xmalloc (sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
464 bzero (inclTable
, sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
465 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
468 else if (inclIndx
>= inclLength
) {
469 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
470 inclTable
= (InclTable
*)
471 xrealloc (inclTable
, sizeof (InclTable
) * inclLength
);
472 bzero (inclTable
+inclLength
-INITIAL_INCLUDE_TABLE_LENGTH
,
473 sizeof (InclTable
)*INITIAL_INCLUDE_TABLE_LENGTH
);
476 inclTable
[inclIndx
].name
= cs
->c_name
;
477 inclTable
[inclIndx
].begin
= cs
->c_value
;
482 record_include_end (cs
)
483 struct coff_symbol
*cs
;
488 fatal ("aix internal: Mismatch C_BINCL/C_EINCL pair found.");
490 pTbl
= &inclTable
[inclIndx
];
491 pTbl
->end
= cs
->c_value
;
498 /* given the start and end addresses of a compilation unit (or a csect, at times)
499 process its lines and create appropriate line vectors. */
502 process_linenos (start
, end
)
503 CORE_ADDR start
, end
;
508 struct subfile main_subfile
; /* subfile structure for the main
511 /* in the main source file, any time we see a function entry, we reset
512 this variable to function's absolute starting line number. All the
513 following line numbers in the function are relative to this, and
514 we record absolute line numbers in record_line(). */
516 int main_source_baseline
= 0;
522 if (!(offset
= first_fun_line_offset
))
523 goto return_after_cleanup
;
525 bzero (&main_subfile
, sizeof (main_subfile
));
526 first_fun_line_offset
= 0;
529 /* All source lines were in the main source file. None in include files. */
531 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
532 &main_source_baseline
);
534 /* else, there was source with line numbers in include files */
537 main_source_baseline
= 0;
538 for (ii
=0; ii
< inclIndx
; ++ii
) {
540 struct subfile
*tmpSubfile
;
542 /* if there is main file source before include file, enter it. */
543 if (offset
< inclTable
[ii
].begin
) {
545 (&main_subfile
, offset
, inclTable
[ii
].begin
- LINESZ
, start
, 0,
546 &main_source_baseline
);
549 /* Have a new subfile for the include file */
551 tmpSubfile
= inclTable
[ii
].subfile
= (struct subfile
*)
552 xmalloc (sizeof (struct subfile
));
554 bzero (tmpSubfile
, sizeof (struct subfile
));
555 firstLine
= &(inclTable
[ii
].funStartLine
);
557 /* enter include file's lines now. */
558 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
559 inclTable
[ii
].end
, start
, 0, firstLine
);
561 offset
= inclTable
[ii
].end
+ LINESZ
;
564 /* all the include files' line have been processed at this point. Now,
565 enter remaining lines of the main file, if any left. */
566 if (offset
< (linetab_offset
+ linetab_size
+ 1 - LINESZ
)) {
567 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
568 &main_source_baseline
);
572 /* Process main file's line numbers. */
573 if (main_subfile
.line_vector
) {
574 struct linetable
*lineTb
, *lv
;
576 lv
= main_subfile
.line_vector
;
578 /* Line numbers are not necessarily ordered. xlc compilation will
579 put static function to the end. */
581 lineTb
= arrange_linetable (lv
);
583 current_subfile
->line_vector
= (struct linetable
*)
584 xrealloc (lv
, (sizeof (struct linetable
)
585 + lv
->nitems
* sizeof (struct linetable_entry
)));
590 current_subfile
->line_vector
= lineTb
;
593 current_subfile
->line_vector_length
=
594 current_subfile
->line_vector
->nitems
;
597 /* Now, process included files' line numbers. */
599 for (ii
=0; ii
< inclIndx
; ++ii
) {
601 if ( (inclTable
[ii
].subfile
)->line_vector
) { /* Useless if!!! FIXMEmgo */
602 struct linetable
*lineTb
, *lv
;
604 lv
= (inclTable
[ii
].subfile
)->line_vector
;
606 /* Line numbers are not necessarily ordered. xlc compilation will
607 put static function to the end. */
609 lineTb
= arrange_linetable (lv
);
613 /* For the same include file, we might want to have more than one subfile.
614 This happens if we have something like:
622 while foo.h including code in it. (stupid but possible)
623 Since start_subfile() looks at the name and uses an existing one if finds,
624 we need to provide a fake name and fool it. */
626 /* start_subfile (inclTable[ii].name, (char*)0); */
627 start_subfile (" ?", (char*)0);
628 current_subfile
->name
=
629 obsavestring (inclTable
[ii
].name
, strlen (inclTable
[ii
].name
),
630 ¤t_objfile
->symbol_obstack
);
633 current_subfile
->line_vector
= (struct linetable
*)
634 xrealloc (lv
, (sizeof (struct linetable
)
635 + lv
->nitems
* sizeof (struct linetable_entry
)));
640 current_subfile
->line_vector
= lineTb
;
643 current_subfile
->line_vector_length
=
644 current_subfile
->line_vector
->nitems
;
645 start_subfile (pop_subfile (), (char*)0);
649 return_after_cleanup
:
651 /* We don't want to keep alloc/free'ing the global include file table. */
654 /* start with a fresh subfile structure for the next file. */
655 bzero (&main_subfile
, sizeof (struct subfile
));
659 aix_process_linenos ()
661 /* process line numbers and enter them into line vector */
662 process_linenos (last_source_start_addr
, cur_src_end_addr
);
666 /* Enter a given range of lines into the line vector.
667 can be called in the following two ways:
668 enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
669 enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine) */
672 enter_line_range (subfile
, beginoffset
, endoffset
, startaddr
, endaddr
, firstLine
)
673 struct subfile
*subfile
;
674 unsigned beginoffset
, endoffset
; /* offsets to line table */
675 CORE_ADDR startaddr
, endaddr
;
681 /* Do Byte swapping, if needed. FIXME! */
682 #define P_LINENO(PP) (*(unsigned short*)((struct external_lineno*)(PP))->l_lnno)
683 #define P_LINEADDR(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_paddr)
684 #define P_LINESYM(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_symndx)
686 pp
= &linetab
[beginoffset
- linetab_offset
];
687 limit
= endoffset
? &linetab
[endoffset
- linetab_offset
]
688 : &linetab
[linetab_size
-1];
690 while (pp
<= limit
) {
692 /* find the address this line represents */
693 addr
= P_LINENO(pp
) ?
694 P_LINEADDR(pp
) : read_symbol_nvalue (symtbl
, P_LINESYM(pp
));
696 if (addr
< startaddr
|| (endaddr
&& addr
> endaddr
))
699 if (P_LINENO(pp
) == 0) {
700 *firstLine
= read_symbol_lineno (symtbl
, P_LINESYM(pp
));
701 record_line (subfile
, 0, addr
);
705 record_line (subfile
, *firstLine
+ P_LINENO(pp
), addr
);
712 int fsize
; /* file size */
713 int fixedparms
; /* number of fixed parms */
714 int floatparms
; /* number of float parms */
715 unsigned int parminfo
; /* parameter info.
716 See /usr/include/sys/debug.h
717 tbtable_ext.parminfo */
718 int framesize
; /* function frame size */
722 /* Given a function symbol, return its traceback information. */
725 retrieve_tracebackinfo (abfd
, textsec
, cs
)
728 struct coff_symbol
*cs
;
730 #define TBTABLE_BUFSIZ 2000
731 #define MIN_TBTABSIZ 50 /* minimum buffer size to hold a
734 static TracebackInfo tbInfo
;
737 static char buffer
[TBTABLE_BUFSIZ
];
740 int bytesread
=0; /* total # of bytes read so far */
741 int bufferbytes
; /* number of bytes in the buffer */
743 int functionstart
= cs
->c_value
- textsec
->vma
;
745 bzero (&tbInfo
, sizeof (tbInfo
));
747 /* keep reading blocks of data from the text section, until finding a zero
748 word and a traceback table. */
752 (TBTABLE_BUFSIZ
< (textsec
->_raw_size
- functionstart
- bytesread
)) ?
753 TBTABLE_BUFSIZ
: (textsec
->_raw_size
- functionstart
- bytesread
))
755 && bfd_get_section_contents (abfd
, textsec
, buffer
,
756 (file_ptr
)(functionstart
+ bytesread
), bufferbytes
))
758 bytesread
+= bufferbytes
;
759 pinsn
= (int*) buffer
;
761 /* if this is the first time we filled the buffer, retrieve function
764 if (bytesread
== bufferbytes
) {
766 /* skip over unrelated instructions */
768 if (*pinsn
== 0x7c0802a6) /* mflr r0 */
770 if ((*pinsn
& 0xfc00003e) == 0x7c000026) /* mfcr Rx */
772 if ((*pinsn
& 0xfc000000) == 0x48000000) /* bl foo, save fprs */
774 if ((*pinsn
& 0xfc1f0000) == 0xbc010000) /* stm Rx, NUM(r1) */
778 int tmp
= (*pinsn
>> 16) & 0xffff;
780 if (tmp
== 0x9421) { /* stu r1, NUM(r1) */
781 tbInfo
.framesize
= 0x10000 - (*pinsn
& 0xffff);
784 else if ((*pinsn
== 0x93e1fffc) || /* st r31,-4(r1) */
785 (tmp
== 0x9001)) /* st r0, NUM(r1) */
787 /* else, could not find a frame size. */
791 } while (++pinsn
&& *pinsn
);
793 if (!tbInfo
.framesize
)
797 /* look for a zero word. */
799 while (*pinsn
&& (pinsn
< (int*)(buffer
+ bufferbytes
- sizeof(int))))
802 if (pinsn
>= (int*)(buffer
+ bufferbytes
))
807 /* function size is the amount of bytes we have skipped so far. */
808 tbInfo
.fsize
= bytesread
- (buffer
+ bufferbytes
- (char*)pinsn
);
812 /* if we don't have the whole traceback table in the buffer, re-read
815 if ((char*)pinsn
> (buffer
+ bufferbytes
- MIN_TBTABSIZ
)) {
817 /* In case if we are *very* close to the end of the text section
818 and cannot read properly from that point on, abort by returning
820 Handle this case more graciously -- FIXME */
822 if (!bfd_get_section_contents (
823 abfd
, textsec
, buffer
,
824 (file_ptr
)(functionstart
+
825 bytesread
- (buffer
+ bufferbytes
- (char*)pinsn
)),MIN_TBTABSIZ
))
826 { printf ("Abnormal return!..\n"); return NULL
; }
828 ptb
= (struct tbtable
*)buffer
;
831 ptb
= (struct tbtable
*)pinsn
;
833 tbInfo
.fixedparms
= ptb
->tb
.fixedparms
;
834 tbInfo
.floatparms
= ptb
->tb
.floatparms
;
835 tbInfo
.parminfo
= ptb
->tb_ext
.parminfo
;
843 /* Given a function symbol, return a pointer to its traceback table. */
846 retrieve_traceback (abfd
, textsec
, cs
, size
)
849 struct coff_symbol
*cs
;
850 int *size
; /* return function size */
852 #define TBTABLE_BUFSIZ 2000
853 #define MIN_TBTABSIZ 50 /* minimum buffer size to hold a
856 static char buffer
[TBTABLE_BUFSIZ
];
859 int bytesread
=0; /* total # of bytes read so far */
860 int bufferbytes
; /* number of bytes in the buffer */
862 int functionstart
= cs
->c_value
- textsec
->filepos
+ textsec
->vma
;
865 /* keep reading blocks of data from the text section, until finding a zero
866 word and a traceback table. */
868 while (bfd_get_section_contents (abfd
, textsec
, buffer
,
869 (file_ptr
)(functionstart
+ bytesread
),
871 (TBTABLE_BUFSIZ
< (textsec
->size
- functionstart
- bytesread
)) ?
872 TBTABLE_BUFSIZ
: (textsec
->size
- functionstart
- bytesread
))))
874 bytesread
+= bufferbytes
;
875 pinsn
= (int*) buffer
;
877 /* look for a zero word. */
879 while (*pinsn
&& (pinsn
< (int*)(buffer
+ bufferbytes
- sizeof(int))))
882 if (pinsn
>= (int*)(buffer
+ bufferbytes
))
887 /* function size is the amount of bytes we have skipped so far. */
888 *size
= bytesread
- (buffer
+ bufferbytes
- pinsn
);
892 /* if we don't have the whole traceback table in the buffer, re-read
895 if ((char*)pinsn
> (buffer
+ bufferbytes
- MIN_TBTABSIZ
)) {
897 /* In case if we are *very* close to the end of the text section
898 and cannot read properly from that point on, abort for now.
899 Handle this case more graciously -- FIXME */
901 if (!bfd_get_section_contents (
902 abfd
, textsec
, buffer
,
903 (file_ptr
)(functionstart
+
904 bytesread
- (buffer
+ bufferbytes
- pinsn
)),MIN_TBTABSIZ
))
905 /* abort (); */ { printf ("abort!!!\n"); return NULL
; }
907 return (struct tbtable
*)buffer
;
910 return (struct tbtable
*)pinsn
;
920 /* Save the vital information for use when closing off the current file.
921 NAME is the file name the symbols came from, START_ADDR is the first
922 text address for the file, and SIZE is the number of bytes of text. */
924 #define complete_symtab(name, start_addr) { \
925 last_source_file = savestring (name, strlen (name)); \
926 last_source_start_addr = start_addr; \
930 /* Refill the symbol table input buffer
931 and set the variables that control fetching entries from it.
932 Reports an error if no data available.
933 This function can read past the end of the symbol table
934 (into the string table) but this does no harm. */
936 /* Reading symbol table has to be fast! Keep the followings as macros, rather
939 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, ALLOCED) \
943 namestr = (NAME) + 1; \
946 obstack_copy0 (&objfile->symbol_obstack, (NAME) + 1, strlen ((NAME)+1)); \
949 prim_record_minimal_symbol (namestr, (ADDR), (TYPE)); \
950 misc_func_recorded = 1; \
954 /* A parameter template, used by ADD_PARM_TO_PENDING. */
956 static struct symbol parmsym
= { /* default parameter symbol */
958 VAR_NAMESPACE
, /* namespace */
965 /* Add a parameter to a given pending symbol list. */
967 #define ADD_PARM_TO_PENDING(PARM, VALUE, PTYPE, PENDING_SYMBOLS) \
969 PARM = (struct symbol *) \
970 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
972 SYMBOL_TYPE (PARM) = PTYPE; \
973 SYMBOL_VALUE (PARM) = VALUE; \
974 add_symbol_to_list (PARM, &PENDING_SYMBOLS); \
978 /* aixcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
979 nested. At any given time, a symbol can only be in one static block.
980 This is the base address of current static block, zero if non exists. */
982 static int static_block_base
= 0;
984 /* true if space for symbol name has been allocated. */
986 static int symname_alloced
= 0;
988 /* read the whole symbol table of a given bfd. */
991 read_xcoff_symtab (objfile
, nsyms
)
992 struct objfile
*objfile
; /* Object file we're reading from */
993 int nsyms
; /* # of symbols */
995 bfd
*abfd
= objfile
->obfd
;
996 char *raw_symbol
; /* Pointer into raw seething symbol table */
997 char *raw_auxptr
; /* Pointer to first raw aux entry for sym */
998 sec_ptr textsec
; /* Pointer to text section */
999 TracebackInfo
*ptb
; /* Pointer to traceback table */
1001 struct internal_syment symbol
[1];
1002 union internal_auxent main_aux
[1];
1003 struct coff_symbol cs
[1];
1004 CORE_ADDR file_start_addr
= 0;
1005 CORE_ADDR file_end_addr
= 0;
1007 int next_file_symnum
= -1;
1008 int just_started
= 1;
1010 int toc_offset
= 0; /* toc offset value in data section. */
1014 long fcn_line_offset
;
1017 struct coff_symbol fcn_stab_saved
;
1019 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1020 union internal_auxent fcn_aux_saved
;
1021 struct type
*fcn_type_saved
= NULL
;
1022 struct context_stack
*new;
1024 char *filestring
= " _start_ "; /* Name of the current file. */
1026 char *last_csect_name
; /* last seen csect's name and value */
1027 CORE_ADDR last_csect_val
;
1028 int misc_func_recorded
; /* true if any misc. function */
1030 current_objfile
= objfile
;
1032 /* Get the appropriate COFF "constants" related to the file we're handling. */
1033 N_TMASK
= coff_data (abfd
)->local_n_tmask
;
1034 N_BTSHFT
= coff_data (abfd
)->local_n_btshft
;
1035 local_symesz
= coff_data (abfd
)->local_symesz
;
1037 last_source_file
= 0;
1038 last_csect_name
= 0;
1040 misc_func_recorded
= 0;
1042 start_symtab (filestring
, (char *)NULL
, file_start_addr
);
1044 first_object_file_end
= 0;
1046 /* Allocate space for the entire symbol table at once, and read it
1047 all in. The bfd is already positioned at the beginning of
1048 the symbol table. */
1050 size
= coff_data (abfd
)->local_symesz
* nsyms
;
1051 symtbl
= xmalloc (size
);
1053 val
= bfd_read (symtbl
, size
, 1, abfd
);
1055 perror_with_name ("reading symbol table");
1057 raw_symbol
= symtbl
;
1059 textsec
= bfd_get_section_by_name (abfd
, ".text");
1061 printf ("Unable to locate text section!\n");
1064 while (symnum
< nsyms
) {
1066 QUIT
; /* make this command interruptable. */
1068 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1069 /* read one symbol into `cs' structure. After processing the whole symbol
1070 table, only string table will be kept in memory, symbol table and debug
1071 section of aixcoff will be freed. Thus we can mark symbols with names
1072 in string table as `alloced'. */
1076 /* Swap and align the symbol into a reasonable C structure. */
1077 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1079 cs
->c_symnum
= symnum
;
1080 cs
->c_nsyms
= symbol
->n_numaux
;
1081 if (symbol
->n_zeroes
) {
1082 symname_alloced
= 0;
1083 /* We must use the original, unswapped, name here so the name field
1084 pointed to by cs->c_name will persist throughout xcoffread. If
1085 we use the new field, it gets overwritten for each symbol. */
1086 cs
->c_name
= ((struct external_syment
*)raw_symbol
)->e
.e_name
;
1087 } else if (symbol
->n_sclass
& 0x80) {
1088 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1089 symname_alloced
= 0;
1090 } else { /* in string table */
1091 cs
->c_name
= strtbl
+ (int)symbol
->n_offset
;
1092 symname_alloced
= 1;
1094 cs
->c_value
= symbol
->n_value
;
1095 /* n_sclass is signed (FIXME), so we had better not mask off any
1096 high bits it contains, since the values we will be comparing
1097 it to are also signed (FIXME). Defined in <coff/internal.h>.
1098 At this point (3Jun92, gnu@cygnus.com) I think the fix is to
1099 make the fields and values unsigned chars, but changing the next
1100 line is a simple patch late in the release cycle, for now. */
1101 cs
->c_sclass
= symbol
->n_sclass
/* & 0xff */;
1102 cs
->c_secnum
= symbol
->n_scnum
;
1103 cs
->c_type
= (unsigned)symbol
->n_type
;
1105 raw_symbol
+= coff_data (abfd
)->local_symesz
;
1108 raw_auxptr
= raw_symbol
; /* Save addr of first aux entry */
1110 /* Skip all the auxents associated with this symbol. */
1111 for (ii
= symbol
->n_numaux
; ii
; --ii
) {
1112 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1117 /* if symbol name starts with ".$" or "$", ignore it. */
1118 if (cs
->c_name
[0] == '$' || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1121 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
) {
1122 if (last_source_file
)
1123 end_symtab (cur_src_end_addr
, 1, 0, objfile
);
1125 start_symtab ("_globals_", (char *)NULL
, (CORE_ADDR
)0);
1126 cur_src_end_addr
= first_object_file_end
;
1127 /* done with all files, everything from here on is globals */
1130 /* if explicitly specified as a function, treat is as one. */
1131 if (ISFCN(cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
) {
1132 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1134 goto function_entry_point
;
1137 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
) && cs
->c_nsyms
== 1)
1139 /* dealing with a symbol with a csect entry. */
1141 # define CSECT(PP) ((PP)->x_csect)
1142 # define CSECT_LEN(PP) (CSECT(PP).x_scnlen)
1143 # define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1144 # define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1145 # define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1147 /* Convert the auxent to something we can access. */
1148 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1151 switch (CSECT_SMTYP (main_aux
)) {
1154 continue; /* ignore all external references. */
1156 case XTY_SD
: /* a section description. */
1158 switch (CSECT_SCLAS (main_aux
)) {
1160 case XMC_PR
: /* a `.text' csect. */
1163 /* A program csect is seen.
1165 We have to allocate one symbol table for each program csect. Normally
1166 gdb prefers one symtab for each compilation unit (CU). In case of AIX, one
1167 CU might include more than one prog csect, and they don't have to be
1168 adjacent in terms of the space they occupy in memory. Thus, one single
1169 CU might get fragmented in the memory and gdb's file start and end address
1170 approach does not work! */
1172 if (last_csect_name
) {
1174 /* if no misc. function recorded in the last seen csect, enter
1175 it as a function. This will take care of functions like
1176 strcmp() compiled by xlc. */
1178 if (!misc_func_recorded
) {
1180 RECORD_MINIMAL_SYMBOL (last_csect_name
, last_csect_val
,
1185 complete_symtab (filestring
, file_start_addr
);
1186 cur_src_end_addr
= file_end_addr
;
1187 end_symtab (file_end_addr
, 1, 0, objfile
);
1188 start_symtab ((char *)NULL
, (char *)NULL
, (CORE_ADDR
)0);
1191 /* If this is the very first csect seen, basically `__start'. */
1193 first_object_file_end
= cs
->c_value
+ CSECT_LEN (main_aux
);
1197 file_start_addr
= cs
->c_value
;
1198 file_end_addr
= cs
->c_value
+ CSECT_LEN (main_aux
);
1200 if (cs
->c_name
&& cs
->c_name
[0] == '.') {
1201 last_csect_name
= cs
->c_name
;
1202 last_csect_val
= cs
->c_value
;
1205 misc_func_recorded
= 0;
1211 /* If the section is not a data description, ignore it. Note that
1212 uninitialized data will show up as XTY_CM/XMC_RW pair. */
1216 warning ("More than one xmc_tc0 symbol found.");
1217 toc_offset
= cs
->c_value
;
1220 case XMC_TC
: /* ignore toc entries */
1221 default : /* any other XMC_XXX */
1225 break; /* switch CSECT_SCLAS() */
1229 /* a function entry point. */
1230 if (CSECT_SCLAS (main_aux
) == XMC_PR
) {
1232 function_entry_point
:
1233 RECORD_MINIMAL_SYMBOL (cs
->c_name
, cs
->c_value
, mst_text
,
1236 fcn_line_offset
= main_aux
->x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
1237 fcn_start_addr
= cs
->c_value
;
1239 /* save the function header info, which will be used
1240 when `.bf' is seen. */
1242 fcn_aux_saved
= *main_aux
;
1247 /* If function has two auxent, then debugging information is
1248 already available for it. Process traceback table for
1249 functions with only one auxent. */
1251 if (cs
->c_nsyms
== 1)
1252 ptb
= retrieve_tracebackinfo (abfd
, textsec
, cs
);
1254 else if (cs
->c_nsyms
!= 2)
1257 /* If there is traceback info, create and add parameters for it. */
1259 if (ptb
&& (ptb
->fixedparms
|| ptb
->floatparms
)) {
1261 int parmcnt
= ptb
->fixedparms
+ ptb
->floatparms
;
1262 char *parmcode
= (char*) &ptb
->parminfo
;
1263 int parmvalue
= ptb
->framesize
+ 0x18; /* sizeof(LINK AREA) == 0x18 */
1264 unsigned int ii
, mask
;
1266 for (ii
=0, mask
= 0x80000000; ii
<parmcnt
; ++ii
) {
1267 struct symbol
*parm
;
1269 if (ptb
->parminfo
& mask
) { /* float or double */
1271 if (ptb
->parminfo
& mask
) { /* double parm */
1273 (parm
, parmvalue
, builtin_type_double
, local_symbols
);
1274 parmvalue
+= sizeof (double);
1276 else { /* float parm */
1278 (parm
, parmvalue
, builtin_type_float
, local_symbols
);
1279 parmvalue
+= sizeof (float);
1282 else { /* fixed parm, use (int*) for hex rep. */
1283 ADD_PARM_TO_PENDING (parm
, parmvalue
,
1284 lookup_pointer_type (builtin_type_int
),
1286 parmvalue
+= sizeof (int);
1291 /* Fake this as a function. Needed in process_xcoff_symbol() */
1294 finish_block(process_xcoff_symbol (cs
, objfile
), &local_symbols
,
1295 pending_blocks
, cs
->c_value
,
1296 cs
->c_value
+ ptb
->fsize
, objfile
);
1300 /* shared library function trampoline code entry point. */
1301 else if (CSECT_SCLAS (main_aux
) == XMC_GL
) {
1303 /* record trampoline code entries as mst_unknown symbol. When we
1304 lookup mst symbols, we will choose mst_text over mst_unknown. */
1307 /* After the implementation of incremental loading of shared
1308 libraries, we don't want to access trampoline entries. This
1309 approach has a consequence of the necessity to bring the whole
1310 shared library at first, in order do anything with it (putting
1311 breakpoints, using malloc, etc). On the other side, this is
1312 consistient with gdb's behaviour on a SUN platform. */
1314 /* Trying to prefer *real* function entry over its trampoline,
1315 by assigning `mst_unknown' type to trampoline entries fails.
1316 Gdb treats those entries as chars. FIXME. */
1318 /* Recording this entry is necessary. Single stepping relies on
1319 this vector to get an idea about function address boundaries. */
1321 prim_record_minimal_symbol (0, cs
->c_value
, mst_unknown
);
1324 /* record trampoline code entries as mst_unknown symbol. When we
1325 lookup mst symbols, we will choose mst_text over mst_unknown. */
1327 RECORD_MINIMAL_SYMBOL (cs
->c_name
, cs
->c_value
, mst_unknown
,
1334 default : /* all other XTY_XXXs */
1336 } /* switch CSECT_SMTYP() */ }
1338 switch (cs
->c_sclass
) {
1342 /* see if the last csect needs to be recorded. */
1344 if (last_csect_name
&& !misc_func_recorded
) {
1346 /* if no misc. function recorded in the last seen csect, enter
1347 it as a function. This will take care of functions like
1348 strcmp() compiled by xlc. */
1351 RECORD_MINIMAL_SYMBOL (last_csect_name
, last_csect_val
,
1355 /* c_value field contains symnum of next .file entry in table
1356 or symnum of first global after last .file. */
1358 next_file_symnum
= cs
->c_value
;
1360 /* complete symbol table for last object file containing
1361 debugging information. */
1363 /* Whether or not there was a csect in the previous file, we have
1364 to call `end_symtab' and `start_symtab' to reset type_vector,
1365 line_vector, etc. structures. */
1367 complete_symtab (filestring
, file_start_addr
);
1368 cur_src_end_addr
= file_end_addr
;
1369 end_symtab (file_end_addr
, 1, 0, objfile
);
1370 start_symtab (cs
->c_name
, (char *)NULL
, (CORE_ADDR
)0);
1371 last_csect_name
= 0;
1373 /* reset file start and end addresses. A compilation unit with no text
1374 (only data) should have zero file boundaries. */
1375 file_start_addr
= file_end_addr
= 0;
1377 filestring
= cs
->c_name
;
1383 #ifdef NO_DEFINE_SYMBOL
1384 /* For a function stab, just save its type in `fcn_type_saved', and leave
1385 it for the `.bf' processing. */
1387 char *pp
= (char*) index (cs
->c_name
, ':');
1389 if (!pp
|| ( *(pp
+1) != 'F' && *(pp
+1) != 'f'))
1390 fatal ("Unrecognized stab");
1394 fatal ("Unprocessed function type");
1396 fcn_type_saved
= lookup_function_type (read_type (&pp
, objfile
));
1399 fcn_stab_saved
= *cs
;
1405 if (strcmp (cs
->c_name
, ".bf") == 0) {
1407 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1410 within_function
= 1;
1412 /* Linenos are now processed on a file-by-file, not fn-by-fn, basis.
1413 Metin did it, I'm not sure why. FIXME. -- gnu@cygnus.com */
1417 1) xlc (IBM's native c compiler) postpones static function code
1418 emission to the end of a compilation unit. This way it can
1419 determine if those functions (statics) are needed or not, and
1420 can do some garbage collection (I think). This makes line
1421 numbers and corresponding addresses unordered, and we end up
1422 with a line table like:
1439 and that breaks gdb's binary search on line numbers, if the
1440 above table is not sorted on line numbers. And that sort
1441 should be on function based, since gcc can emit line numbers
1444 10 0x100 - for the init/test part of a for stmt.
1447 10 0x400 - for the increment part of a for stmt.
1449 arrange_linenos() will do this sorting.
1452 2) aix symbol table might look like:
1454 c_file // beginning of a new file
1455 .bi // beginning of include file
1456 .ei // end of include file
1460 basically, .bi/.ei pairs do not necessarily encapsulate
1461 their scope. They need to be recorded, and processed later
1462 on when we come the end of the compilation unit.
1463 Include table (inclTable) and process_linenos() handle
1466 mark_first_line (fcn_line_offset
, cs
->c_symnum
);
1468 new = push_context (0, fcn_start_addr
);
1470 #ifdef NO_DEFINE_SYMBOL
1471 new->name
= process_xcoff_symbol (&fcn_cs_saved
, objfile
);
1473 /* Between a function symbol and `.bf', there always will be a function
1474 stab. We save function type when processing that stab. */
1476 if (fcn_type_saved
== NULL
) {
1477 printf ("Unknown function type: symbol 0x%x\n", cs
->c_symnum
);
1478 SYMBOL_TYPE (new->name
) = lookup_function_type (builtin_type_int
);
1481 SYMBOL_TYPE (new->name
) = fcn_type_saved
;
1482 fcn_type_saved
= NULL
;
1485 new->name
= define_symbol
1486 (fcn_cs_saved
.c_value
, fcn_stab_saved
.c_name
, 0, 0, objfile
);
1489 else if (strcmp (cs
->c_name
, ".ef") == 0) {
1491 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1494 /* the value of .ef is the address of epilogue code;
1495 not useful for gdb */
1496 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1497 contains number of lines to '}' */
1499 fcn_last_line
= main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1500 new = pop_context ();
1501 if (context_stack_depth
!= 0)
1502 error ("invalid symbol data; .bf/.ef/.bb/.eb symbol mismatch, at symbol %d.",
1505 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1507 fcn_cs_saved
.c_value
+
1508 fcn_aux_saved
.x_sym
.x_misc
.x_fsize
, objfile
);
1509 within_function
= 0;
1513 case C_BSTAT
: /* begin static block */
1514 static_block_base
= read_symbol_nvalue (symtbl
, cs
->c_value
);
1517 case C_ESTAT
: /* end of static block */
1518 static_block_base
= 0;
1521 case C_ARG
: /* These are not implemented. */
1527 printf ("ERROR: Unimplemented storage class: %d.\n", cs
->c_sclass
);
1530 case C_HIDEXT
: /* ignore these.. */
1535 case C_BINCL
: /* beginning of include file */
1537 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1538 order. Thus, when wee see them, we might not know enough info
1539 to process them. Thus, we'll be saving them into a table
1540 (inclTable) and postpone their processing. */
1542 record_include_begin (cs
);
1545 case C_EINCL
: /* end of include file */
1546 /* see the comment after case C_BINCL. */
1547 record_include_end (cs
);
1551 if (strcmp (cs
->c_name
, ".bb") == 0) {
1553 new = push_context (depth
, cs
->c_value
);
1555 else if (strcmp (cs
->c_name
, ".eb") == 0) {
1556 new = pop_context ();
1557 if (depth
!= new->depth
)
1558 error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.",
1562 if (local_symbols
&& context_stack_depth
> 0) {
1563 /* Make a block for the local symbols within. */
1564 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1565 new->start_addr
, cs
->c_value
, objfile
);
1567 local_symbols
= new->locals
;
1572 (void) process_xcoff_symbol (cs
, objfile
);
1578 if (last_source_file
)
1579 end_symtab (cur_src_end_addr
, 1, 0, objfile
);
1582 current_objfile
= NULL
;
1584 /* Record the toc offset value of this symbol table into ldinfo structure.
1585 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
1586 this information would be file auxiliary header. */
1588 xcoff_add_toc_to_loadinfo (toc_offset
);
1591 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1592 (SYMBOL2) = (struct symbol *) \
1593 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
1594 *(SYMBOL2) = *(SYMBOL1);
1597 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1598 (ALLOCED) ? (NAME) : obstack_copy0 (&objfile->symbol_obstack, (NAME), strlen (NAME));
1601 /* process one xcoff symbol. */
1603 static struct symbol
*
1604 process_xcoff_symbol (cs
, objfile
)
1605 register struct coff_symbol
*cs
;
1606 struct objfile
*objfile
;
1608 struct symbol onesymbol
;
1609 register struct symbol
*sym
= &onesymbol
;
1610 struct symbol
*sym2
= NULL
;
1612 char *name
, *pp
, *qq
;
1613 int struct_and_type_combined
;
1620 bzero (sym
, sizeof (struct symbol
));
1622 /* default assumptions */
1623 SYMBOL_VALUE (sym
) = cs
->c_value
;
1624 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1626 if (ISFCN (cs
->c_type
)) {
1628 /* At this point, we don't know the type of the function and assume it
1629 is int. This will be patched with the type from its stab entry later
1630 on in patch_block_stabs () */
1632 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1633 SYMBOL_TYPE (sym
) = lookup_function_type (lookup_fundamental_type (objfile
, FT_INTEGER
));
1635 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1636 SYMBOL_DUP (sym
, sym2
);
1638 if (cs
->c_sclass
== C_EXT
)
1639 add_symbol_to_list (sym2
, &global_symbols
);
1640 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1641 add_symbol_to_list (sym2
, &file_symbols
);
1646 /* in case we can't figure out the type, default is `int'. */
1647 SYMBOL_TYPE (sym
) = lookup_fundamental_type (objfile
, FT_INTEGER
);
1649 switch (cs
->c_sclass
)
1653 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1654 add_stab_to_list (name
, &global_stabs
);
1656 add_stab_to_list (name
, &file_stabs
);
1660 case C_DECL
: /* a type decleration?? */
1662 #if defined(NO_TYPEDEFS) || defined(NO_DEFINE_SYMBOL)
1663 qq
= (char*) strchr (name
, ':');
1664 if (!qq
) /* skip if there is no ':' */
1667 nameless
= (qq
== name
);
1669 struct_and_type_combined
= (qq
[1] == 'T' && qq
[2] == 't');
1670 pp
= qq
+ (struct_and_type_combined
? 3 : 2);
1673 /* To handle GNU C++ typename abbreviation, we need to be able to fill
1674 in a type's name as soon as space for that type is allocated. */
1676 if (struct_and_type_combined
&& name
!= qq
) {
1679 struct type
*tmp_type
;
1682 read_type_number (&tmp_pp
, typenums
);
1683 tmp_type
= dbx_alloc_type (typenums
, objfile
);
1685 if (tmp_type
&& !TYPE_NAME (tmp_type
) && !nameless
)
1686 TYPE_NAME (tmp_type
) = SYMBOL_NAME (sym
) =
1687 obsavestring (name
, qq
-name
,
1688 &objfile
->symbol_obstack
);
1690 ttype
= SYMBOL_TYPE (sym
) = read_type (&pp
);
1692 /* if there is no name for this typedef, you don't have to keep its
1693 symbol, since nobody could ask for it. Otherwise, build a symbol
1694 and add it into symbol_list. */
1700 /* Transarc wants to eliminate type definitions from the symbol table.
1701 Limited debugging capabilities, but faster symbol table processing
1702 and less memory usage. Note that tag definitions (starting with
1703 'T') will remain intact. */
1705 if (qq
[1] != 'T' && (!TYPE_NAME (ttype
) || *(TYPE_NAME (ttype
)) == '\0')) {
1707 if (SYMBOL_NAME (sym
))
1708 TYPE_NAME (ttype
) = SYMBOL_NAME (sym
);
1710 TYPE_NAME (ttype
) = obsavestring (name
, qq
-name
);
1715 #endif /* !NO_TYPEDEFS */
1717 /* read_type() will return null if type (or tag) definition was
1718 unnnecessarily duplicated. Also, if the symbol doesn't have a name,
1719 there is no need to keep it in symbol table. */
1720 /* The above argument no longer valid. read_type() never returns NULL. */
1725 /* if there is no name for this typedef, you don't have to keep its
1726 symbol, since nobody could ask for it. Otherwise, build a symbol
1727 and add it into symbol_list. */
1730 SYMBOL_NAMESPACE (sym
) = STRUCT_NAMESPACE
;
1731 else if (qq
[1] == 't')
1732 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1734 warning ("Unrecognized stab string.\n");
1738 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1739 if (!SYMBOL_NAME (sym
))
1740 SYMBOL_NAME (sym
) = obsavestring (name
, qq
-name
);
1742 SYMBOL_DUP (sym
, sym2
);
1744 (sym2
, within_function
? &local_symbols
: &file_symbols
);
1746 /* For a combination of struct and type, add one more symbol
1749 if (struct_and_type_combined
) {
1750 SYMBOL_DUP (sym
, sym2
);
1751 SYMBOL_NAMESPACE (sym2
) = VAR_NAMESPACE
;
1753 (sym2
, within_function
? &local_symbols
: &file_symbols
);
1756 /* assign a name to the type node. */
1758 if (!TYPE_NAME (ttype
) || *(TYPE_NAME (ttype
)) == '\0') {
1759 if (struct_and_type_combined
)
1760 TYPE_NAME (ttype
) = SYMBOL_NAME (sym
);
1761 else if (qq
[1] == 'T') /* struct namespace */
1762 TYPE_NAME (ttype
) = concat (
1763 TYPE_CODE (ttype
) == TYPE_CODE_UNION
? "union " :
1764 TYPE_CODE (ttype
) == TYPE_CODE_STRUCT
? "struct " : "enum ",
1765 SYMBOL_NAME (sym
), NULL
);
1769 #else /* !NO_DEFINE_SYMBOL */
1770 return define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1774 add_stab_to_list (name
, &global_stabs
);
1780 #ifdef NO_DEFINE_SYMBOL
1781 if (*name
== ':' || (pp
= (char *) strchr (name
, ':')) == NULL
)
1783 SYMBOL_NAME (sym
) = obsavestring (name
, pp
-name
, &objfile
-> symbol_obstack
);
1784 SYMBOL_CLASS (sym
) = (cs
->c_sclass
== C_PSYM
) ? LOC_ARG
: LOC_REGPARM
;
1786 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
1787 SYMBOL_DUP (sym
, sym2
);
1788 add_symbol_to_list (sym2
, &local_symbols
);
1791 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1792 SYMBOL_CLASS (sym
) = (cs
->c_sclass
== C_PSYM
) ? LOC_ARG
: LOC_REGPARM
;
1798 #ifdef NO_DEFINE_SYMBOL
1799 if (*name
== ':' || (pp
= (char *) strchr (name
, ':')) == NULL
)
1801 SYMBOL_NAME (sym
) = obsavestring (name
, pp
-name
, &objfile
-> symbol_obstack
);
1802 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1803 SYMBOL_VALUE (sym
) += static_block_base
;
1805 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
1806 SYMBOL_DUP (sym
, sym2
);
1808 (sym2
, within_function
? &local_symbols
: &file_symbols
);
1811 /* If we are going to use Sun dbx's define_symbol(), we need to
1812 massage our stab string a little. Change 'V' type to 'S' to be
1813 comparible with Sun. */
1815 if (*name
== ':' || (pp
= (char *) index (name
, ':')) == NULL
)
1819 if (*pp
== 'V') *pp
= 'S';
1820 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1821 SYMBOL_VALUE (sym
) += static_block_base
;
1826 if (*name
== ':' || (pp
= (char *) strchr (name
, ':')) == NULL
)
1828 SYMBOL_NAME (sym
) = obsavestring (name
, pp
-name
, &objfile
-> symbol_obstack
);
1829 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1831 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
1832 SYMBOL_DUP (sym
, sym2
);
1833 add_symbol_to_list (sym2
, &local_symbols
);
1837 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1838 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1839 SYMBOL_DUP (sym
, sym2
);
1840 add_symbol_to_list (sym2
, &local_symbols
);
1844 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1845 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1846 SYMBOL_DUP (sym
, sym2
);
1847 add_symbol_to_list (sym2
, &global_symbols
);
1851 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1852 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1853 SYMBOL_DUP (sym
, sym2
);
1855 (sym2
, within_function
? &local_symbols
: &file_symbols
);
1859 printf ("ERROR! C_REG is not fully implemented!\n");
1860 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1861 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1862 SYMBOL_DUP (sym
, sym2
);
1863 add_symbol_to_list (sym2
, &local_symbols
);
1868 #ifdef NO_DEFINE_SYMBOL
1869 pp
= (char*) strchr (name
, ':');
1870 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1871 SYMBOL_VALUE (sym
) = STAB_REG_TO_REGNUM (cs
->c_value
);
1873 SYMBOL_NAME (sym
) = obsavestring (name
, pp
-name
, &objfile
-> symbol_obstack
);
1876 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
1879 /* else this is not a stab entry, suppose the type is either
1880 `int' or `float', depending on the register class. */
1882 SYMBOL_TYPE (sym
) = (SYMBOL_VALUE (sym
) < 32)
1883 ? lookup_fundamental_type (objfile
, FT_INTEGER
)
1884 : lookup_fundamental_type (objfile
, FT_FLOAT
);
1886 SYMBOL_DUP (sym
, sym2
);
1887 add_symbol_to_list (sym2
, &local_symbols
);
1891 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1895 warning ("A non-stab C_RSYM needs special handling.");
1901 warning ("Unexpected storage class: %d.", cs
->c_sclass
);
1910 read_symbol_nvalue (symtable
, symno
)
1914 struct internal_syment symbol
[1];
1916 bfd_coff_swap_sym_in (symfile_bfd
, symtable
+ (symno
*local_symesz
), symbol
);
1917 return symbol
->n_value
;
1922 read_symbol_lineno (symtable
, symno
)
1926 struct internal_syment symbol
[1];
1927 union internal_auxent main_aux
[1];
1931 for (ii
= 0; ii
< 50; ii
++) {
1932 bfd_coff_swap_sym_in (symfile_bfd
,
1933 symtable
+ (symno
*local_symesz
), symbol
);
1934 if (symbol
->n_sclass
== C_FCN
&& 0 == strcmp (symbol
->n_name
, ".bf"))
1936 symno
+= symbol
->n_numaux
+1;
1939 printf ("GDB Error: `.bf' not found.\n");
1943 /* take aux entry and return its lineno */
1945 bfd_coff_swap_aux_in (symfile_bfd
, symtable
+(symno
*local_symesz
),
1946 symbol
->n_type
, symbol
->n_sclass
, main_aux
);
1948 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1951 /* Support for line number handling */
1953 /* This function is called for every section; it finds the outer limits
1954 * of the line table (minimum and maximum file offset) so that the
1955 * mainline code can read the whole thing for efficiency.
1958 find_linenos(abfd
, asect
, vpinfo
)
1963 struct coff_symfile_info
*info
;
1965 file_ptr offset
, maxoff
;
1967 count
= asect
->lineno_count
;
1969 if (strcmp (asect
->name
, ".text") || count
== 0)
1972 size
= count
* coff_data (symfile_bfd
)->local_linesz
;
1973 info
= (struct coff_symfile_info
*)vpinfo
;
1974 offset
= asect
->line_filepos
;
1975 maxoff
= offset
+ size
;
1977 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1978 info
->min_lineno_offset
= offset
;
1980 if (maxoff
> info
->max_lineno_offset
)
1981 info
->max_lineno_offset
= maxoff
;
1985 /* Read in all the line numbers for fast lookups later. Leave them in
1986 external (unswapped) format in memory; we'll swap them as we enter
1987 them into GDB's data structures. */
1990 init_lineno (abfd
, offset
, size
)
1997 if (bfd_seek(abfd
, offset
, 0) < 0)
2000 linetab
= (char *) xmalloc(size
);
2002 val
= bfd_read(linetab
, 1, size
, abfd
);
2006 linetab_offset
= offset
;
2007 linetab_size
= size
;
2008 make_cleanup (free
, linetab
); /* Be sure it gets de-allocated. */
2012 /* dbx allows the text of a symbol name to be continued into the
2013 next symbol name! When such a continuation is encountered
2014 (a \ at the end of the text of a name)
2015 call this function to get the continuation. */
2016 /* So far, I haven't seen this happenning xlc output. I doubt we'll need this
2019 #undef next_symbol_text
2020 #define next_symbol_text() \
2021 printf ("Gdb Error: symbol names on multiple lines not implemented.\n")
2024 /* xlc/dbx combination uses a set of builtin types, starting from -1. return
2025 the proper type node fora given builtin type #. */
2034 printf ("ERROR!, unknown built-in type!\n");
2038 read_type_number (pp
, typenums
);
2040 /* default types are defined in dbxstclass.h. */
2041 switch ( typenums
[1] ) {
2043 return lookup_fundamental_type (current_objfile
, FT_INTEGER
);
2045 return lookup_fundamental_type (current_objfile
, FT_CHAR
);
2047 return lookup_fundamental_type (current_objfile
, FT_SHORT
);
2049 return lookup_fundamental_type (current_objfile
, FT_LONG
);
2051 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_CHAR
);
2053 return lookup_fundamental_type (current_objfile
, FT_SIGNED_CHAR
);
2055 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_SHORT
);
2057 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_INTEGER
);
2059 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_INTEGER
);
2061 return lookup_fundamental_type (current_objfile
, FT_UNSIGNED_LONG
);
2063 return lookup_fundamental_type (current_objfile
, FT_VOID
);
2065 return lookup_fundamental_type (current_objfile
, FT_FLOAT
);
2067 return lookup_fundamental_type (current_objfile
, FT_DBL_PREC_FLOAT
);
2069 return lookup_fundamental_type (current_objfile
, FT_EXT_PREC_FLOAT
);
2071 /* requires a builtin `integer' */
2072 return lookup_fundamental_type (current_objfile
, FT_INTEGER
);
2074 return lookup_fundamental_type (current_objfile
, FT_BOOLEAN
);
2076 /* requires builtin `short real' */
2077 return lookup_fundamental_type (current_objfile
, FT_FLOAT
);
2079 /* requires builtin `real' */
2080 return lookup_fundamental_type (current_objfile
, FT_FLOAT
);
2082 printf ("ERROR! Unknown builtin type -%d\n", typenums
[1]);
2087 #if 0 /* Seems to be unused, don't bother converting from old misc function
2088 vector usage to new minimal symbol tables. FIXME: Delete this? */
2090 /* if we now nothing about a function but its address, make a function symbol
2091 out of it with the limited knowladge you have. This will be used when
2092 somebody refers to a function, which doesn't exist in the symbol table,
2093 but is in the minimal symbol table. */
2096 build_function_symbol (ind
, objfile
)
2098 struct objfile
*objfile
;
2100 struct symbol
*sym
=
2101 (struct symbol
*) obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symbol
));
2102 SYMBOL_NAME (sym
) = misc_function_vector
[ind
].name
;
2103 /* SYMBOL_VALUE (sym) = misc_function_vector[ind].address; */
2104 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
2105 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
2106 SYMBOL_TYPE (sym
) = lookup_function_type (lookup_fundamental_type (current_objfile
, FT_INTEGER
));
2107 SYMBOL_BLOCK_VALUE (sym
) = (struct block
*)
2108 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct block
));
2109 BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) = misc_function_vector
[ind
].address
;
2116 aixcoff_new_init (objfile
)
2117 struct objfile
*objfile
;
2122 aixcoff_symfile_init (objfile
)
2123 struct objfile
*objfile
;
2125 bfd
*abfd
= objfile
->obfd
;
2127 /* Allocate struct to keep track of the symfile */
2128 objfile
-> sym_private
= xmmalloc (objfile
-> md
,
2129 sizeof (struct coff_symfile_info
));
2130 init_entry_point_info (objfile
);
2133 /* Perform any local cleanups required when we are done with a particular
2134 objfile. I.E, we are in the process of discarding all symbol information
2135 for an objfile, freeing up all memory held for it, and unlinking the
2136 objfile struct from the global list of known objfiles. */
2139 aixcoff_symfile_finish (objfile
)
2140 struct objfile
*objfile
;
2142 if (objfile
-> sym_private
!= NULL
)
2144 mfree (objfile
-> md
, objfile
-> sym_private
);
2147 /* Start with a fresh include table for the next objfile. */
2154 inclIndx
= inclLength
= inclDepth
= 0;
2159 init_stringtab(abfd
, offset
, objfile
)
2162 struct objfile
*objfile
;
2166 unsigned char lengthbuf
[4];
2168 if (bfd_seek(abfd
, offset
, 0) < 0)
2171 val
= bfd_read((char *)lengthbuf
, 1, sizeof lengthbuf
, abfd
);
2172 length
= bfd_h_get_32(abfd
, lengthbuf
);
2174 /* If no string table is needed, then the file may end immediately
2175 after the symbols. Just return with `strtbl' set to null. */
2177 if (val
!= sizeof length
|| length
< sizeof length
)
2180 /* Allocate string table from symbol_obstack. We will need this table
2181 as long as we have its symbol table around. */
2183 strtbl
= (char*) obstack_alloc (&objfile
->symbol_obstack
, length
);
2187 bcopy(&length
, strtbl
, sizeof length
);
2188 if (length
== sizeof length
)
2191 val
= bfd_read(strtbl
+ sizeof length
, 1, length
- sizeof length
, abfd
);
2193 if (val
!= length
- sizeof length
|| strtbl
[length
- 1] != '\0')
2200 init_debugsection(abfd
)
2203 register sec_ptr secp
;
2204 bfd_size_type length
;
2211 secp
= bfd_get_section_by_name(abfd
, ".debug");
2215 if (!(length
= bfd_section_size(abfd
, secp
)))
2218 debugsec
= (char *) xmalloc ((unsigned)length
);
2219 if (debugsec
== NULL
)
2222 if (!bfd_get_section_contents(abfd
, secp
, debugsec
, (file_ptr
) 0, length
)) {
2223 printf ("Can't read .debug section from symbol file\n");
2238 /* aixcoff version of symbol file read. */
2241 aixcoff_symfile_read (objfile
, addr
, mainline
)
2242 struct objfile
*objfile
;
2246 int num_symbols
; /* # of symbols */
2247 int symtab_offset
; /* symbol table and */
2248 int stringtab_offset
; /* string table file offsets */
2251 struct coff_symfile_info
*info
;
2254 info
= (struct coff_symfile_info
*) objfile
-> sym_private
;
2255 symfile_bfd
= abfd
= objfile
->obfd
;
2256 name
= objfile
->name
;
2258 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2259 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2260 stringtab_offset
= symtab_offset
+
2261 num_symbols
* coff_data(abfd
)->local_symesz
;
2263 info
->min_lineno_offset
= 0;
2264 info
->max_lineno_offset
= 0;
2265 bfd_map_over_sections (abfd
, find_linenos
, info
);
2267 /* FIXME! This stuff should move into symfile_init */
2268 if (info
->min_lineno_offset
!= 0
2269 && info
->max_lineno_offset
> info
->min_lineno_offset
) {
2271 /* only read in the line # table if one exists */
2272 val
= init_lineno(abfd
, info
->min_lineno_offset
,
2273 info
->max_lineno_offset
- info
->min_lineno_offset
);
2276 error("\"%s\": error reading line numbers\n", name
);
2279 val
= init_stringtab(abfd
, stringtab_offset
, objfile
);
2281 error ("\"%s\": can't get string table", name
);
2284 if (init_debugsection(abfd
) < 0) {
2285 error ("Error reading .debug section of `%s'\n", name
);
2288 /* Position to read the symbol table. Do not read it all at once. */
2289 val
= bfd_seek(abfd
, (long)symtab_offset
, 0);
2291 perror_with_name(name
);
2293 if (bfd_tell(abfd
) != symtab_offset
)
2296 init_minimal_symbol_collection ();
2297 make_cleanup (discard_minimal_symbols
, 0);
2299 /* Initialize load info structure. */
2301 xcoff_init_loadinfo ();
2303 /* Now that the executable file is positioned at symbol table,
2304 process it and define symbols accordingly. */
2306 read_xcoff_symtab(objfile
, num_symbols
);
2308 /* Free debug section. */
2309 free_debugsection ();
2311 /* Sort symbols alphabetically within each block. */
2314 /* Install any minimal symbols that have been collected as the current
2315 minimal symbols for this objfile. */
2317 install_minimal_symbols (objfile
);
2319 /* Make a default for file to list. */
2320 select_source_symtab (0);
2323 /* Register our ability to parse symbols for aixcoff BFD files. */
2325 static struct sym_fns aixcoff_sym_fns
=
2327 "aixcoff-rs6000", /* sym_name: name or name prefix of BFD target type */
2328 15, /* sym_namelen: number of significant sym_name chars */
2329 aixcoff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2330 aixcoff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2331 aixcoff_symfile_read
, /* sym_read: read a symbol file into symtab */
2332 aixcoff_symfile_finish
, /* sym_finish: finished with file, cleanup */
2333 NULL
/* next: pointer to next struct sym_fns */
2337 _initialize_xcoffread ()
2339 add_symtab_fns(&aixcoff_sym_fns
);
2342 #else /* IBM6000_HOST */
2344 builtin_type (ignore
)
2347 fatal ("GDB internal eror: builtin_type called on non-RS/6000!");
2349 #endif /* IBM6000_HOST */