1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993
3 Free Software Foundation, Inc.
4 Derived from coffread.c, dbxread.c, and a lot of hacking.
5 Contributed by IBM Corporation.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
23 /* Native only: Need struct tbtable in <sys/debug.h> from host, and
24 need xcoff_add_toc_to_loadinfo in rs6000-tdep.c from target.
25 need xcoff_init_loadinfo ditto.
26 However, if you grab <sys/debug.h> and make it available on your
27 host, and define FAKING_RS6000, then this code will compile. */
32 /* AIX XCOFF names have a preceeding dot `.' */
33 #define NAMES_HAVE_DOT 1
35 #include <sys/types.h>
40 #include <sys/param.h>
45 #include <sys/debug.h>
52 #include "stabsread.h"
53 #include "gdb-stabs.h"
54 #include "complaints.h"
56 #include "coff/internal.h" /* FIXME, internal data from BFD */
57 #include "libcoff.h" /* FIXME, internal data from BFD */
58 #include "coff/rs6000.h" /* FIXME, raw file-format guts of xcoff */
61 /* Define this if you want gdb use the old xcoff symbol processing. This
62 way it won't use common `define_symbol()' function and Sun dbx stab
63 string grammar. And likely it won't be able to do G++ debugging. */
65 /* #define NO_DEFINE_SYMBOL 1 */
67 /* Define this if you want gdb to ignore typdef stabs. This was needed for
68 one of Transarc, to reduce the size of the symbol table. Types won't be
69 recognized, but tag names will be. */
71 /* #define NO_TYPEDEFS 1 */
73 /* Simplified internal version of coff symbol table information */
77 int c_symnum
; /* symbol number of this entry */
78 int c_nsyms
; /* 0 if syment only, 1 if syment + auxent */
85 /* The COFF line table, in raw form. */
86 static char *linetab
= NULL
; /* Its actual contents */
87 static long linetab_offset
; /* Its offset in the file */
88 static unsigned long linetab_size
; /* Its size */
90 /* last function's saved coff symbol `cs' */
92 static struct coff_symbol fcn_cs_saved
;
94 static bfd
*symfile_bfd
;
96 /* Core address of start and end of text of current source file.
97 This is calculated from the first function seen after a C_FILE
101 static CORE_ADDR cur_src_end_addr
;
103 /* Core address of the end of the first object file. */
105 static CORE_ADDR first_object_file_end
;
107 /* pointer to the string table */
110 /* length of the string table */
111 static int strtbl_len
;
113 /* pointer to debug section */
114 static char *debugsec
;
116 /* pointer to the a.out symbol table */
119 /* Number of symbols in symtbl. */
120 static int symtbl_num_syms
;
122 /* initial symbol-table-debug-string vector length */
124 #define INITIAL_STABVECTOR_LENGTH 40
126 /* Nonzero if within a function (so symbols should be local,
127 if nothing says specifically). */
131 /* Local variables that hold the shift and mask values for the
132 COFF file that we are currently reading. These come back to us
133 from BFD, and are referenced by their macro names, as well as
134 internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
135 macros from ../internalcoff.h . */
137 static unsigned local_n_btshft
;
138 static unsigned local_n_tmask
;
141 #define N_BTSHFT local_n_btshft
143 #define N_TMASK local_n_tmask
145 /* Local variables that hold the sizes in the file of various COFF structures.
146 (We only need to know this to read them from the file -- BFD will then
147 translate the data in them, into `internal_xxx' structs in the right
148 byte order, alignment, etc.) */
150 static unsigned local_symesz
;
152 struct coff_symfile_info
{
153 file_ptr min_lineno_offset
; /* Where in file lowest line#s are */
154 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file */
157 static struct complaint rsym_complaint
=
158 {"Non-stab C_RSYM `%s' needs special handling", 0, 0};
160 static struct complaint storclass_complaint
=
161 {"Unexpected storage class: %d", 0, 0};
163 static struct complaint bf_notfound_complaint
=
164 {"line numbers off, `.bf' symbol not found", 0, 0};
167 enter_line_range
PARAMS ((struct subfile
*, unsigned, unsigned,
168 CORE_ADDR
, CORE_ADDR
, unsigned *));
171 free_debugsection
PARAMS ((void));
174 init_debugsection
PARAMS ((bfd
*));
177 init_stringtab
PARAMS ((bfd
*, file_ptr
, struct objfile
*));
180 xcoff_symfile_init
PARAMS ((struct objfile
*));
183 xcoff_new_init
PARAMS ((struct objfile
*));
186 struct section_offset
;
190 xcoff_symfile_read
PARAMS ((struct objfile
*, struct section_offset
*, int));
193 xcoff_symfile_finish
PARAMS ((struct objfile
*));
195 static struct section_offsets
*
196 xcoff_symfile_offsets
PARAMS ((struct objfile
*, CORE_ADDR
));
199 init_lineno
PARAMS ((bfd
*, file_ptr
, int));
202 find_linenos
PARAMS ((bfd
*, sec_ptr
, PTR
));
205 read_symbol_lineno
PARAMS ((int));
208 read_symbol_nvalue
PARAMS ((int));
210 static struct symbol
*
211 process_xcoff_symbol
PARAMS ((struct coff_symbol
*, struct objfile
*));
214 read_xcoff_symtab
PARAMS ((struct objfile
*, int));
217 add_stab_to_list
PARAMS ((char *, struct pending_stabs
**));
220 sort_syms
PARAMS ((void));
223 compare_symbols
PARAMS ((const void *, const void *));
225 /* Call sort_syms to sort alphabetically
226 the symbols of each block of each symtab. */
229 compare_symbols (s1p
, s2p
)
233 /* Names that are less should come first. */
234 register struct symbol
**s1
= (struct symbol
**) s1p
;
235 register struct symbol
**s2
= (struct symbol
**) s2p
;
236 register int namediff
= STRCMP (SYMBOL_NAME (*s1
), SYMBOL_NAME (*s2
));
240 /* For symbols of the same name, registers should come first. */
241 return ((SYMBOL_CLASS (*s2
) == LOC_REGISTER
)
242 - (SYMBOL_CLASS (*s1
) == LOC_REGISTER
));
246 /* Sort a vector of symbols by their value. */
251 register struct symtab
*s
;
252 register struct objfile
*objfile
;
254 register struct blockvector
*bv
;
255 register struct block
*b
;
257 for (objfile
= object_files
; objfile
!= NULL
; objfile
= objfile
-> next
)
259 for (s
= objfile
-> symtabs
; s
!= NULL
; s
= s
-> next
)
261 bv
= BLOCKVECTOR (s
);
262 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
263 for (i
= 0; i
< nbl
; i
++)
265 b
= BLOCKVECTOR_BLOCK (bv
, i
);
266 if (BLOCK_SHOULD_SORT (b
))
268 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
269 sizeof (struct symbol
*), compare_symbols
);
277 /* add a given stab string into given stab vector. */
280 add_stab_to_list (stabname
, stabvector
)
282 struct pending_stabs
**stabvector
;
284 if ( *stabvector
== NULL
) {
285 *stabvector
= (struct pending_stabs
*)
286 xmalloc (sizeof (struct pending_stabs
) +
287 INITIAL_STABVECTOR_LENGTH
* sizeof (char*));
288 (*stabvector
)->count
= 0;
289 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
291 else if ((*stabvector
)->count
>= (*stabvector
)->length
) {
292 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
293 *stabvector
= (struct pending_stabs
*)
294 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
295 (*stabvector
)->length
* sizeof (char*));
297 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
302 /* for all the stabs in a given stab vector, build appropriate types
303 and fix their symbols in given symbol vector. */
306 patch_block_stabs (symbols
, stabs
)
307 struct pending
*symbols
;
308 struct pending_stabs
*stabs
;
315 /* for all the stab entries, find their corresponding symbols and
316 patch their types! */
318 for (ii
=0; ii
< stabs
->count
; ++ii
) {
319 char *name
= stabs
->stab
[ii
];
320 char *pp
= (char*) index (name
, ':');
321 struct symbol
*sym
= find_symbol_in_list (symbols
, name
, pp
-name
);
324 /* printf ("ERROR! stab symbol not found!\n"); */ /* FIXME */
325 /* The above is a false alarm. There are cases the we can have
326 a stab, without its symbol. xlc generates this for the extern
327 definitions in inner blocks. */
332 if (*(pp
-1) == 'F' || *(pp
-1) == 'f')
333 SYMBOL_TYPE (sym
) = lookup_function_type (read_type (&pp
, objfile
));
335 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
342 /* compare line table entry addresses. */
345 compare_lte (lte1
, lte2
)
346 struct linetable_entry
*lte1
, *lte2
;
348 return lte1
->pc
- lte2
->pc
;
351 /* Give a line table with function entries are marked, arrange its functions
352 in assending order and strip off function entry markers and return it in
353 a newly created table. If the old one is good enough, return the old one. */
355 static struct linetable
*
356 arrange_linetable (oldLineTb
)
357 struct linetable
*oldLineTb
; /* old linetable */
360 newline
, /* new line count */
361 function_count
; /* # of functions */
363 struct linetable_entry
*fentry
; /* function entry vector */
364 int fentry_size
; /* # of function entries */
365 struct linetable
*newLineTb
; /* new line table */
367 #define NUM_OF_FUNCTIONS 20
369 fentry_size
= NUM_OF_FUNCTIONS
;
370 fentry
= (struct linetable_entry
*)
371 malloc (fentry_size
* sizeof (struct linetable_entry
));
373 for (function_count
=0, ii
=0; ii
<oldLineTb
->nitems
; ++ii
) {
375 if (oldLineTb
->item
[ii
].line
== 0) { /* function entry found. */
377 if (function_count
>= fentry_size
) { /* make sure you have room. */
379 fentry
= (struct linetable_entry
*)
380 realloc (fentry
, fentry_size
* sizeof (struct linetable_entry
));
382 fentry
[function_count
].line
= ii
;
383 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
388 if (function_count
== 0) {
392 else if (function_count
> 1)
393 qsort (fentry
, function_count
, sizeof(struct linetable_entry
), compare_lte
);
395 /* allocate a new line table. */
396 newLineTb
= (struct linetable
*) malloc (sizeof (struct linetable
) +
397 (oldLineTb
->nitems
- function_count
) * sizeof (struct linetable_entry
));
399 /* if line table does not start with a function beginning, copy up until
403 if (oldLineTb
->item
[0].line
!= 0)
405 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
406 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
408 /* Now copy function lines one by one. */
410 for (ii
=0; ii
< function_count
; ++ii
) {
411 for (jj
= fentry
[ii
].line
+ 1;
412 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
414 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
417 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
;
423 /* We try to detect the beginning of a compilation unit. That info will
424 be used as an entry in line number recording routines (enter_line_range) */
426 static unsigned first_fun_line_offset
;
427 static unsigned first_fun_bf
;
429 #define mark_first_line(OFFSET, SYMNUM) \
430 if (!first_fun_line_offset) { \
431 first_fun_line_offset = OFFSET; \
432 first_fun_bf = SYMNUM; \
436 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
437 following `IncludeChain'. At the end of each symtab (end_symtab),
438 we will determine if we should create additional symtab's to
439 represent if (the include files. */
442 typedef struct _inclTable
{
443 char *name
; /* include filename */
445 /* Offsets to the line table. end points to the last entry which is
446 part of this include file. */
449 struct subfile
*subfile
;
450 unsigned funStartLine
; /* start line # of its function */
453 #define INITIAL_INCLUDE_TABLE_LENGTH 20
454 static InclTable
*inclTable
; /* global include table */
455 static int inclIndx
; /* last entry to table */
456 static int inclLength
; /* table length */
457 static int inclDepth
; /* nested include depth */
461 record_include_begin (cs
)
462 struct coff_symbol
*cs
;
464 /* In xcoff, we assume include files cannot be nested (not in .c files
465 of course, but in corresponding .s files.) */
468 fatal ("xcoff internal: pending include file exists.");
472 /* allocate an include file, or make room for the new entry */
473 if (inclLength
== 0) {
474 inclTable
= (InclTable
*)
475 xmalloc (sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
476 bzero (inclTable
, sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
477 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
480 else if (inclIndx
>= inclLength
) {
481 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
482 inclTable
= (InclTable
*)
483 xrealloc (inclTable
, sizeof (InclTable
) * inclLength
);
484 bzero (inclTable
+inclLength
-INITIAL_INCLUDE_TABLE_LENGTH
,
485 sizeof (InclTable
)*INITIAL_INCLUDE_TABLE_LENGTH
);
488 inclTable
[inclIndx
].name
= cs
->c_name
;
489 inclTable
[inclIndx
].begin
= cs
->c_value
;
494 record_include_end (cs
)
495 struct coff_symbol
*cs
;
500 fatal ("xcoff internal: Mismatch C_BINCL/C_EINCL pair found.");
502 pTbl
= &inclTable
[inclIndx
];
503 pTbl
->end
= cs
->c_value
;
510 /* given the start and end addresses of a compilation unit (or a csect, at times)
511 process its lines and create appropriate line vectors. */
514 process_linenos (start
, end
)
515 CORE_ADDR start
, end
;
520 struct subfile main_subfile
; /* subfile structure for the main
523 /* in the main source file, any time we see a function entry, we reset
524 this variable to function's absolute starting line number. All the
525 following line numbers in the function are relative to this, and
526 we record absolute line numbers in record_line(). */
528 int main_source_baseline
= 0;
534 if (!(offset
= first_fun_line_offset
))
535 goto return_after_cleanup
;
537 bzero (&main_subfile
, sizeof (main_subfile
));
538 first_fun_line_offset
= 0;
541 /* All source lines were in the main source file. None in include files. */
543 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
544 &main_source_baseline
);
546 /* else, there was source with line numbers in include files */
549 main_source_baseline
= 0;
550 for (ii
=0; ii
< inclIndx
; ++ii
) {
552 struct subfile
*tmpSubfile
;
554 /* if there is main file source before include file, enter it. */
555 if (offset
< inclTable
[ii
].begin
) {
557 (&main_subfile
, offset
, inclTable
[ii
].begin
- LINESZ
, start
, 0,
558 &main_source_baseline
);
561 /* Have a new subfile for the include file */
563 tmpSubfile
= inclTable
[ii
].subfile
= (struct subfile
*)
564 xmalloc (sizeof (struct subfile
));
566 bzero (tmpSubfile
, sizeof (struct subfile
));
567 firstLine
= &(inclTable
[ii
].funStartLine
);
569 /* enter include file's lines now. */
570 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
571 inclTable
[ii
].end
, start
, 0, firstLine
);
573 offset
= inclTable
[ii
].end
+ LINESZ
;
576 /* all the include files' line have been processed at this point. Now,
577 enter remaining lines of the main file, if any left. */
578 if (offset
< (linetab_offset
+ linetab_size
+ 1 - LINESZ
)) {
579 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
580 &main_source_baseline
);
584 /* Process main file's line numbers. */
585 if (main_subfile
.line_vector
) {
586 struct linetable
*lineTb
, *lv
;
588 lv
= main_subfile
.line_vector
;
590 /* Line numbers are not necessarily ordered. xlc compilation will
591 put static function to the end. */
593 lineTb
= arrange_linetable (lv
);
595 current_subfile
->line_vector
= (struct linetable
*)
596 xrealloc (lv
, (sizeof (struct linetable
)
597 + lv
->nitems
* sizeof (struct linetable_entry
)));
602 current_subfile
->line_vector
= lineTb
;
605 current_subfile
->line_vector_length
=
606 current_subfile
->line_vector
->nitems
;
609 /* Now, process included files' line numbers. */
611 for (ii
=0; ii
< inclIndx
; ++ii
) {
613 if ( (inclTable
[ii
].subfile
)->line_vector
) { /* Useless if!!! FIXMEmgo */
614 struct linetable
*lineTb
, *lv
;
616 lv
= (inclTable
[ii
].subfile
)->line_vector
;
618 /* Line numbers are not necessarily ordered. xlc compilation will
619 put static function to the end. */
621 lineTb
= arrange_linetable (lv
);
625 /* For the same include file, we might want to have more than one subfile.
626 This happens if we have something like:
634 while foo.h including code in it. (stupid but possible)
635 Since start_subfile() looks at the name and uses an existing one if finds,
636 we need to provide a fake name and fool it. */
638 /* start_subfile (inclTable[ii].name, (char*)0); */
639 start_subfile (" ?", (char*)0);
640 free (current_subfile
->name
);
641 current_subfile
->name
= strdup (inclTable
[ii
].name
);
644 current_subfile
->line_vector
= (struct linetable
*)
645 xrealloc (lv
, (sizeof (struct linetable
)
646 + lv
->nitems
* sizeof (struct linetable_entry
)));
651 current_subfile
->line_vector
= lineTb
;
654 current_subfile
->line_vector_length
=
655 current_subfile
->line_vector
->nitems
;
656 start_subfile (pop_subfile (), (char*)0);
660 return_after_cleanup
:
662 /* We don't want to keep alloc/free'ing the global include file table. */
665 /* start with a fresh subfile structure for the next file. */
666 bzero (&main_subfile
, sizeof (struct subfile
));
670 aix_process_linenos ()
672 /* process line numbers and enter them into line vector */
673 process_linenos (last_source_start_addr
, cur_src_end_addr
);
677 /* Enter a given range of lines into the line vector.
678 can be called in the following two ways:
679 enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
680 enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine)
682 endoffset points to the last line table entry that we should pay
686 enter_line_range (subfile
, beginoffset
, endoffset
, startaddr
, endaddr
, firstLine
)
687 struct subfile
*subfile
;
688 unsigned beginoffset
, endoffset
; /* offsets to line table */
689 CORE_ADDR startaddr
, endaddr
;
695 /* Do Byte swapping, if needed. FIXME! */
696 #define P_LINENO(PP) (*(unsigned short*)((struct external_lineno*)(PP))->l_lnno)
697 #define P_LINEADDR(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_paddr)
698 #define P_LINESYM(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_symndx)
700 pp
= &linetab
[beginoffset
- linetab_offset
];
701 if (endoffset
!= 0 && endoffset
- linetab_offset
>= linetab_size
)
703 static struct complaint msg
=
704 {"Bad line table offset in C_EINCL directive", 0, 0};
708 limit
= endoffset
? &linetab
[endoffset
- linetab_offset
]
709 : &linetab
[linetab_size
-1];
711 while (pp
<= limit
) {
713 /* find the address this line represents */
714 addr
= P_LINENO(pp
) ?
715 P_LINEADDR(pp
) : read_symbol_nvalue (P_LINESYM(pp
));
717 if (addr
< startaddr
|| (endaddr
&& addr
> endaddr
))
720 if (P_LINENO(pp
) == 0) {
721 *firstLine
= read_symbol_lineno (P_LINESYM(pp
));
722 record_line (subfile
, 0, addr
);
726 record_line (subfile
, *firstLine
+ P_LINENO(pp
), addr
);
733 int fsize
; /* file size */
734 int fixedparms
; /* number of fixed parms */
735 int floatparms
; /* number of float parms */
736 unsigned int parminfo
; /* parameter info.
737 See /usr/include/sys/debug.h
738 tbtable_ext.parminfo */
739 int framesize
; /* function frame size */
743 /* Given a function symbol, return its traceback information. */
746 retrieve_tracebackinfo (abfd
, textsec
, cs
)
749 struct coff_symbol
*cs
;
751 #define TBTABLE_BUFSIZ 2000
753 /* Minimum buffer size to hold a traceback table. */
754 #define MIN_TBTABSIZ 50
756 static TracebackInfo tbInfo
;
759 static char buffer
[TBTABLE_BUFSIZ
];
762 int bytesread
=0; /* total # of bytes read so far */
763 int bufferbytes
; /* number of bytes in the buffer */
765 int functionstart
= cs
->c_value
- textsec
->vma
;
767 bzero (&tbInfo
, sizeof (tbInfo
));
769 /* keep reading blocks of data from the text section, until finding a zero
770 word and a traceback table. */
772 /* Note: The logical thing way to write this code would be to assign
773 to bufferbytes within the while condition. But that triggers a
774 compiler (xlc in AIX 3.2) bug, so simplify it... */
776 (TBTABLE_BUFSIZ
< (textsec
->_raw_size
- functionstart
- bytesread
) ?
777 TBTABLE_BUFSIZ
: (textsec
->_raw_size
- functionstart
- bytesread
));
779 && (bfd_get_section_contents
780 (abfd
, textsec
, buffer
,
781 (file_ptr
)(functionstart
+ bytesread
), bufferbytes
)))
783 bytesread
+= bufferbytes
;
784 pinsn
= (int*) buffer
;
786 /* if this is the first time we filled the buffer, retrieve function
789 if (bytesread
== bufferbytes
) {
791 /* skip over unrelated instructions */
793 if (*pinsn
== 0x7c0802a6) /* mflr r0 */
795 if ((*pinsn
& 0xfc00003e) == 0x7c000026) /* mfcr Rx */
797 if ((*pinsn
& 0xfc000000) == 0x48000000) /* bl foo, save fprs */
799 if ((*pinsn
& 0xfc1f0000) == 0xbc010000) /* stm Rx, NUM(r1) */
803 int tmp
= (*pinsn
>> 16) & 0xffff;
805 if (tmp
== 0x9421) { /* stu r1, NUM(r1) */
806 tbInfo
.framesize
= 0x10000 - (*pinsn
& 0xffff);
809 else if ((*pinsn
== 0x93e1fffc) || /* st r31,-4(r1) */
810 (tmp
== 0x9001)) /* st r0, NUM(r1) */
812 /* else, could not find a frame size. */
816 } while (++pinsn
&& *pinsn
);
818 if (!tbInfo
.framesize
)
823 /* look for a zero word. */
825 while (*pinsn
&& (pinsn
< (int*)(buffer
+ bufferbytes
- sizeof(int))))
828 if (pinsn
>= (int*)(buffer
+ bufferbytes
))
833 /* function size is the amount of bytes we have skipped so far. */
834 tbInfo
.fsize
= bytesread
- (buffer
+ bufferbytes
- (char*)pinsn
);
838 /* if we don't have the whole traceback table in the buffer, re-read
841 if ((char*)pinsn
> (buffer
+ bufferbytes
- MIN_TBTABSIZ
)) {
843 /* In case if we are *very* close to the end of the text section
844 and cannot read properly from that point on, abort by returning
846 Handle this case more graciously -- FIXME */
848 if (!bfd_get_section_contents (
849 abfd
, textsec
, buffer
,
850 (file_ptr
)(functionstart
+
851 bytesread
- (buffer
+ bufferbytes
- (char*)pinsn
)),MIN_TBTABSIZ
))
852 { printf ("Abnormal return!..\n"); return NULL
; }
854 ptb
= (struct tbtable
*)buffer
;
857 ptb
= (struct tbtable
*)pinsn
;
859 tbInfo
.fixedparms
= ptb
->tb
.fixedparms
;
860 tbInfo
.floatparms
= ptb
->tb
.floatparms
;
861 tbInfo
.parminfo
= ptb
->tb_ext
.parminfo
;
865 (TBTABLE_BUFSIZ
< (textsec
->_raw_size
- functionstart
- bytesread
) ?
866 TBTABLE_BUFSIZ
: (textsec
->_raw_size
- functionstart
- bytesread
));
872 /* Given a function symbol, return a pointer to its traceback table. */
875 retrieve_traceback (abfd
, textsec
, cs
, size
)
878 struct coff_symbol
*cs
;
879 int *size
; /* return function size */
881 #define TBTABLE_BUFSIZ 2000
882 #define MIN_TBTABSIZ 50 /* minimum buffer size to hold a
885 static char buffer
[TBTABLE_BUFSIZ
];
888 int bytesread
=0; /* total # of bytes read so far */
889 int bufferbytes
; /* number of bytes in the buffer */
891 int functionstart
= cs
->c_value
- textsec
->filepos
+ textsec
->vma
;
894 /* keep reading blocks of data from the text section, until finding a zero
895 word and a traceback table. */
897 while (bfd_get_section_contents (abfd
, textsec
, buffer
,
898 (file_ptr
)(functionstart
+ bytesread
),
900 (TBTABLE_BUFSIZ
< (textsec
->size
- functionstart
- bytesread
)) ?
901 TBTABLE_BUFSIZ
: (textsec
->size
- functionstart
- bytesread
))))
903 bytesread
+= bufferbytes
;
904 pinsn
= (int*) buffer
;
906 /* look for a zero word. */
908 while (*pinsn
&& (pinsn
< (int*)(buffer
+ bufferbytes
- sizeof(int))))
911 if (pinsn
>= (int*)(buffer
+ bufferbytes
))
916 /* function size is the amount of bytes we have skipped so far. */
917 *size
= bytesread
- (buffer
+ bufferbytes
- pinsn
);
921 /* if we don't have the whole traceback table in the buffer, re-read
924 if ((char*)pinsn
> (buffer
+ bufferbytes
- MIN_TBTABSIZ
)) {
926 /* In case if we are *very* close to the end of the text section
927 and cannot read properly from that point on, abort for now.
928 Handle this case more graciously -- FIXME */
930 if (!bfd_get_section_contents (
931 abfd
, textsec
, buffer
,
932 (file_ptr
)(functionstart
+
933 bytesread
- (buffer
+ bufferbytes
- pinsn
)),MIN_TBTABSIZ
))
934 /* abort (); */ { printf ("abort!!!\n"); return NULL
; }
936 return (struct tbtable
*)buffer
;
939 return (struct tbtable
*)pinsn
;
949 /* Save the vital information for use when closing off the current file.
950 NAME is the file name the symbols came from, START_ADDR is the first
951 text address for the file, and SIZE is the number of bytes of text. */
953 #define complete_symtab(name, start_addr) { \
954 last_source_file = savestring (name, strlen (name)); \
955 last_source_start_addr = start_addr; \
959 /* Refill the symbol table input buffer
960 and set the variables that control fetching entries from it.
961 Reports an error if no data available.
962 This function can read past the end of the symbol table
963 (into the string table) but this does no harm. */
965 /* Reading symbol table has to be fast! Keep the followings as macros, rather
968 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, ALLOCED) \
972 namestr = (NAME) + 1; \
975 obstack_copy0 (&objfile->symbol_obstack, (NAME) + 1, strlen ((NAME)+1)); \
978 prim_record_minimal_symbol (namestr, (ADDR), (TYPE)); \
979 misc_func_recorded = 1; \
983 /* A parameter template, used by ADD_PARM_TO_PENDING. It is initialized
984 in our initializer function at the bottom of the file, to avoid
985 dependencies on the exact "struct symbol" format. */
987 static struct symbol parmsym
;
989 /* Add a parameter to a given pending symbol list. */
991 #define ADD_PARM_TO_PENDING(PARM, VALUE, PTYPE, PENDING_SYMBOLS) \
993 PARM = (struct symbol *) \
994 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
996 SYMBOL_TYPE (PARM) = PTYPE; \
997 SYMBOL_VALUE (PARM) = VALUE; \
998 add_symbol_to_list (PARM, &PENDING_SYMBOLS); \
1002 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
1003 nested. At any given time, a symbol can only be in one static block.
1004 This is the base address of current static block, zero if non exists. */
1006 static int static_block_base
= 0;
1008 /* true if space for symbol name has been allocated. */
1010 static int symname_alloced
= 0;
1012 /* read the whole symbol table of a given bfd. */
1015 read_xcoff_symtab (objfile
, nsyms
)
1016 struct objfile
*objfile
; /* Object file we're reading from */
1017 int nsyms
; /* # of symbols */
1019 bfd
*abfd
= objfile
->obfd
;
1020 char *raw_symbol
; /* Pointer into raw seething symbol table */
1021 char *raw_auxptr
; /* Pointer to first raw aux entry for sym */
1022 sec_ptr textsec
; /* Pointer to text section */
1023 TracebackInfo
*ptb
; /* Pointer to traceback table */
1025 struct internal_syment symbol
[1];
1026 union internal_auxent main_aux
[1];
1027 struct coff_symbol cs
[1];
1028 CORE_ADDR file_start_addr
= 0;
1029 CORE_ADDR file_end_addr
= 0;
1031 int next_file_symnum
= -1;
1032 int just_started
= 1;
1034 int toc_offset
= 0; /* toc offset value in data section. */
1038 long fcn_line_offset
;
1041 struct coff_symbol fcn_stab_saved
;
1043 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1044 union internal_auxent fcn_aux_saved
;
1045 struct type
*fcn_type_saved
= NULL
;
1046 struct context_stack
*new;
1048 char *filestring
= " _start_ "; /* Name of the current file. */
1050 char *last_csect_name
; /* last seen csect's name and value */
1051 CORE_ADDR last_csect_val
;
1052 int misc_func_recorded
; /* true if any misc. function */
1054 current_objfile
= objfile
;
1056 /* Get the appropriate COFF "constants" related to the file we're handling. */
1057 N_TMASK
= coff_data (abfd
)->local_n_tmask
;
1058 N_BTSHFT
= coff_data (abfd
)->local_n_btshft
;
1059 local_symesz
= coff_data (abfd
)->local_symesz
;
1061 last_source_file
= NULL
;
1062 last_csect_name
= 0;
1064 misc_func_recorded
= 0;
1067 start_symtab (filestring
, (char *)NULL
, file_start_addr
);
1069 first_object_file_end
= 0;
1071 /* Allocate space for the entire symbol table at once, and read it
1072 all in. The bfd is already positioned at the beginning of
1073 the symbol table. */
1075 size
= coff_data (abfd
)->local_symesz
* nsyms
;
1076 symtbl
= xmalloc (size
);
1077 symtbl_num_syms
= nsyms
;
1079 val
= bfd_read (symtbl
, size
, 1, abfd
);
1081 perror_with_name ("reading symbol table");
1083 raw_symbol
= symtbl
;
1085 textsec
= bfd_get_section_by_name (abfd
, ".text");
1087 printf ("Unable to locate text section!\n");
1090 while (symnum
< nsyms
) {
1092 QUIT
; /* make this command interruptable. */
1094 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1095 /* read one symbol into `cs' structure. After processing the whole symbol
1096 table, only string table will be kept in memory, symbol table and debug
1097 section of xcoff will be freed. Thus we can mark symbols with names
1098 in string table as `alloced'. */
1102 /* Swap and align the symbol into a reasonable C structure. */
1103 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1105 cs
->c_symnum
= symnum
;
1106 cs
->c_nsyms
= symbol
->n_numaux
;
1107 if (symbol
->n_zeroes
) {
1108 symname_alloced
= 0;
1109 /* We must use the original, unswapped, name here so the name field
1110 pointed to by cs->c_name will persist throughout xcoffread. If
1111 we use the new field, it gets overwritten for each symbol. */
1112 cs
->c_name
= ((struct external_syment
*)raw_symbol
)->e
.e_name
;
1113 } else if (symbol
->n_sclass
& 0x80) {
1114 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1115 symname_alloced
= 0;
1116 } else { /* in string table */
1117 cs
->c_name
= strtbl
+ (int)symbol
->n_offset
;
1118 symname_alloced
= 1;
1120 cs
->c_value
= symbol
->n_value
;
1121 /* n_sclass is signed (FIXME), so we had better not mask off any
1122 high bits it contains, since the values we will be comparing
1123 it to are also signed (FIXME). Defined in <coff/internal.h>.
1124 At this point (3Jun92, gnu@cygnus.com) I think the fix is to
1125 make the fields and values unsigned chars, but changing the next
1126 line is a simple patch late in the release cycle, for now. */
1127 cs
->c_sclass
= symbol
->n_sclass
/* & 0xff */;
1128 cs
->c_secnum
= symbol
->n_scnum
;
1129 cs
->c_type
= (unsigned)symbol
->n_type
;
1131 raw_symbol
+= coff_data (abfd
)->local_symesz
;
1134 raw_auxptr
= raw_symbol
; /* Save addr of first aux entry */
1136 /* Skip all the auxents associated with this symbol. */
1137 for (ii
= symbol
->n_numaux
; ii
; --ii
) {
1138 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1143 /* if symbol name starts with ".$" or "$", ignore it. */
1144 if (cs
->c_name
[0] == '$' || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1147 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
) {
1148 if (last_source_file
)
1150 end_symtab (cur_src_end_addr
, 1, 0, objfile
);
1155 start_symtab ("_globals_", (char *)NULL
, (CORE_ADDR
)0);
1156 cur_src_end_addr
= first_object_file_end
;
1157 /* done with all files, everything from here on is globals */
1160 /* if explicitly specified as a function, treat is as one. */
1161 if (ISFCN(cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
) {
1162 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1164 goto function_entry_point
;
1167 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
) && cs
->c_nsyms
== 1)
1169 /* dealing with a symbol with a csect entry. */
1171 # define CSECT(PP) ((PP)->x_csect)
1172 # define CSECT_LEN(PP) (CSECT(PP).x_scnlen)
1173 # define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1174 # define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1175 # define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1177 /* Convert the auxent to something we can access. */
1178 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1181 switch (CSECT_SMTYP (main_aux
)) {
1184 continue; /* ignore all external references. */
1186 case XTY_SD
: /* a section description. */
1188 switch (CSECT_SCLAS (main_aux
)) {
1190 case XMC_PR
: /* a `.text' csect. */
1193 /* A program csect is seen.
1195 We have to allocate one symbol table for each program csect. Normally
1196 gdb prefers one symtab for each compilation unit (CU). In case of AIX, one
1197 CU might include more than one prog csect, and they don't have to be
1198 adjacent in terms of the space they occupy in memory. Thus, one single
1199 CU might get fragmented in the memory and gdb's file start and end address
1200 approach does not work! */
1202 if (last_csect_name
) {
1204 /* if no misc. function recorded in the last seen csect, enter
1205 it as a function. This will take care of functions like
1206 strcmp() compiled by xlc. */
1208 if (!misc_func_recorded
) {
1210 RECORD_MINIMAL_SYMBOL (last_csect_name
, last_csect_val
,
1215 complete_symtab (filestring
, file_start_addr
);
1216 cur_src_end_addr
= file_end_addr
;
1217 end_symtab (file_end_addr
, 1, 0, objfile
);
1220 start_symtab ((char *)NULL
, (char *)NULL
, (CORE_ADDR
)0);
1223 /* If this is the very first csect seen, basically `__start'. */
1225 first_object_file_end
= cs
->c_value
+ CSECT_LEN (main_aux
);
1229 file_start_addr
= cs
->c_value
;
1230 file_end_addr
= cs
->c_value
+ CSECT_LEN (main_aux
);
1232 if (cs
->c_name
&& cs
->c_name
[0] == '.') {
1233 last_csect_name
= cs
->c_name
;
1234 last_csect_val
= cs
->c_value
;
1237 misc_func_recorded
= 0;
1243 /* If the section is not a data description, ignore it. Note that
1244 uninitialized data will show up as XTY_CM/XMC_RW pair. */
1248 warning ("More than one xmc_tc0 symbol found.");
1249 toc_offset
= cs
->c_value
;
1252 case XMC_TC
: /* ignore toc entries */
1253 default : /* any other XMC_XXX */
1257 break; /* switch CSECT_SCLAS() */
1261 /* a function entry point. */
1262 if (CSECT_SCLAS (main_aux
) == XMC_PR
) {
1264 function_entry_point
:
1265 RECORD_MINIMAL_SYMBOL (cs
->c_name
, cs
->c_value
, mst_text
,
1268 fcn_line_offset
= main_aux
->x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
1269 fcn_start_addr
= cs
->c_value
;
1271 /* save the function header info, which will be used
1272 when `.bf' is seen. */
1274 fcn_aux_saved
= *main_aux
;
1279 /* If function has two auxent, then debugging information is
1280 already available for it. Process traceback table for
1281 functions with only one auxent. */
1283 if (cs
->c_nsyms
== 1)
1284 ptb
= retrieve_tracebackinfo (abfd
, textsec
, cs
);
1286 else if (cs
->c_nsyms
!= 2)
1289 /* If there is traceback info, create and add parameters for it. */
1291 if (ptb
&& (ptb
->fixedparms
|| ptb
->floatparms
)) {
1293 int parmcnt
= ptb
->fixedparms
+ ptb
->floatparms
;
1294 char *parmcode
= (char*) &ptb
->parminfo
;
1295 int parmvalue
= ptb
->framesize
+ 0x18; /* sizeof(LINK AREA) == 0x18 */
1296 unsigned int ii
, mask
;
1298 for (ii
=0, mask
= 0x80000000; ii
<parmcnt
; ++ii
) {
1299 struct symbol
*parm
;
1301 if (ptb
->parminfo
& mask
) { /* float or double */
1303 if (ptb
->parminfo
& mask
) { /* double parm */
1305 (parm
, parmvalue
, builtin_type_double
, local_symbols
);
1306 parmvalue
+= sizeof (double);
1308 else { /* float parm */
1310 (parm
, parmvalue
, builtin_type_float
, local_symbols
);
1311 parmvalue
+= sizeof (float);
1314 else { /* fixed parm, use (int*) for hex rep. */
1315 ADD_PARM_TO_PENDING (parm
, parmvalue
,
1316 lookup_pointer_type (builtin_type_int
),
1318 parmvalue
+= sizeof (int);
1323 /* Fake this as a function. Needed in process_xcoff_symbol() */
1326 finish_block(process_xcoff_symbol (cs
, objfile
), &local_symbols
,
1327 pending_blocks
, cs
->c_value
,
1328 cs
->c_value
+ ptb
->fsize
, objfile
);
1332 /* shared library function trampoline code entry point. */
1333 else if (CSECT_SCLAS (main_aux
) == XMC_GL
) {
1335 /* record trampoline code entries as mst_unknown symbol. When we
1336 lookup mst symbols, we will choose mst_text over mst_unknown. */
1339 /* After the implementation of incremental loading of shared
1340 libraries, we don't want to access trampoline entries. This
1341 approach has a consequence of the necessity to bring the whole
1342 shared library at first, in order do anything with it (putting
1343 breakpoints, using malloc, etc). On the other side, this is
1344 consistient with gdb's behaviour on a SUN platform. */
1346 /* Trying to prefer *real* function entry over its trampoline,
1347 by assigning `mst_unknown' type to trampoline entries fails.
1348 Gdb treats those entries as chars. FIXME. */
1350 /* Recording this entry is necessary. Single stepping relies on
1351 this vector to get an idea about function address boundaries. */
1353 prim_record_minimal_symbol ("<trampoline>", cs
->c_value
,
1357 /* record trampoline code entries as mst_unknown symbol. When we
1358 lookup mst symbols, we will choose mst_text over mst_unknown. */
1360 RECORD_MINIMAL_SYMBOL (cs
->c_name
, cs
->c_value
, mst_unknown
,
1367 default : /* all other XTY_XXXs */
1369 } /* switch CSECT_SMTYP() */ }
1371 switch (cs
->c_sclass
) {
1375 /* see if the last csect needs to be recorded. */
1377 if (last_csect_name
&& !misc_func_recorded
) {
1379 /* if no misc. function recorded in the last seen csect, enter
1380 it as a function. This will take care of functions like
1381 strcmp() compiled by xlc. */
1384 RECORD_MINIMAL_SYMBOL (last_csect_name
, last_csect_val
,
1388 /* c_value field contains symnum of next .file entry in table
1389 or symnum of first global after last .file. */
1391 next_file_symnum
= cs
->c_value
;
1393 /* complete symbol table for last object file containing
1394 debugging information. */
1396 /* Whether or not there was a csect in the previous file, we have to call
1397 `end_stabs' and `start_stabs' to reset type_vector,
1398 line_vector, etc. structures. */
1400 complete_symtab (filestring
, file_start_addr
);
1401 cur_src_end_addr
= file_end_addr
;
1402 end_symtab (file_end_addr
, 1, 0, objfile
);
1405 start_symtab (cs
->c_name
, (char *)NULL
, (CORE_ADDR
)0);
1406 last_csect_name
= 0;
1408 /* reset file start and end addresses. A compilation unit with no text
1409 (only data) should have zero file boundaries. */
1410 file_start_addr
= file_end_addr
= 0;
1412 filestring
= cs
->c_name
;
1418 #ifdef NO_DEFINE_SYMBOL
1419 /* For a function stab, just save its type in `fcn_type_saved', and leave
1420 it for the `.bf' processing. */
1422 char *pp
= (char*) index (cs
->c_name
, ':');
1424 if (!pp
|| ( *(pp
+1) != 'F' && *(pp
+1) != 'f'))
1425 fatal ("Unrecognized stab");
1429 fatal ("Unprocessed function type");
1431 fcn_type_saved
= lookup_function_type (read_type (&pp
, objfile
));
1434 fcn_stab_saved
= *cs
;
1440 if (STREQ (cs
->c_name
, ".bf")) {
1442 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1445 within_function
= 1;
1447 /* Linenos are now processed on a file-by-file, not fn-by-fn, basis.
1448 Metin did it, I'm not sure why. FIXME. -- gnu@cygnus.com */
1452 1) xlc (IBM's native c compiler) postpones static function code
1453 emission to the end of a compilation unit. This way it can
1454 determine if those functions (statics) are needed or not, and
1455 can do some garbage collection (I think). This makes line
1456 numbers and corresponding addresses unordered, and we end up
1457 with a line table like:
1474 and that breaks gdb's binary search on line numbers, if the
1475 above table is not sorted on line numbers. And that sort
1476 should be on function based, since gcc can emit line numbers
1479 10 0x100 - for the init/test part of a for stmt.
1482 10 0x400 - for the increment part of a for stmt.
1484 arrange_linenos() will do this sorting.
1487 2) aix symbol table might look like:
1489 c_file // beginning of a new file
1490 .bi // beginning of include file
1491 .ei // end of include file
1495 basically, .bi/.ei pairs do not necessarily encapsulate
1496 their scope. They need to be recorded, and processed later
1497 on when we come the end of the compilation unit.
1498 Include table (inclTable) and process_linenos() handle
1501 mark_first_line (fcn_line_offset
, cs
->c_symnum
);
1503 new = push_context (0, fcn_start_addr
);
1505 #ifdef NO_DEFINE_SYMBOL
1506 new->name
= process_xcoff_symbol (&fcn_cs_saved
, objfile
);
1508 /* Between a function symbol and `.bf', there always will be a function
1509 stab. We save function type when processing that stab. */
1511 if (fcn_type_saved
== NULL
) {
1512 printf ("Unknown function type: symbol 0x%x\n", cs
->c_symnum
);
1513 SYMBOL_TYPE (new->name
) = lookup_function_type (builtin_type_int
);
1516 SYMBOL_TYPE (new->name
) = fcn_type_saved
;
1517 fcn_type_saved
= NULL
;
1520 new->name
= define_symbol
1521 (fcn_cs_saved
.c_value
, fcn_stab_saved
.c_name
, 0, 0, objfile
);
1524 else if (STREQ (cs
->c_name
, ".ef")) {
1526 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1529 /* the value of .ef is the address of epilogue code;
1530 not useful for gdb */
1531 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1532 contains number of lines to '}' */
1534 fcn_last_line
= main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1535 new = pop_context ();
1536 if (context_stack_depth
!= 0)
1537 error ("invalid symbol data; .bf/.ef/.bb/.eb symbol mismatch, at symbol %d.",
1540 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1542 fcn_cs_saved
.c_value
+
1543 fcn_aux_saved
.x_sym
.x_misc
.x_fsize
, objfile
);
1544 within_function
= 0;
1548 case C_BSTAT
: /* begin static block */
1549 static_block_base
= read_symbol_nvalue (cs
->c_value
);
1552 case C_ESTAT
: /* end of static block */
1553 static_block_base
= 0;
1556 case C_ARG
: /* These are not implemented. */
1562 printf ("ERROR: Unimplemented storage class: %d.\n", cs
->c_sclass
);
1565 case C_HIDEXT
: /* ignore these.. */
1570 case C_BINCL
: /* beginning of include file */
1572 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1573 order. Thus, when wee see them, we might not know enough info
1574 to process them. Thus, we'll be saving them into a table
1575 (inclTable) and postpone their processing. */
1577 record_include_begin (cs
);
1580 case C_EINCL
: /* end of include file */
1581 /* see the comment after case C_BINCL. */
1582 record_include_end (cs
);
1586 if (STREQ (cs
->c_name
, ".bb")) {
1588 new = push_context (depth
, cs
->c_value
);
1590 else if (STREQ (cs
->c_name
, ".eb")) {
1591 new = pop_context ();
1592 if (depth
!= new->depth
)
1593 error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.",
1597 if (local_symbols
&& context_stack_depth
> 0) {
1598 /* Make a block for the local symbols within. */
1599 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1600 new->start_addr
, cs
->c_value
, objfile
);
1602 local_symbols
= new->locals
;
1607 process_xcoff_symbol (cs
, objfile
);
1613 if (last_source_file
)
1615 end_symtab (cur_src_end_addr
, 1, 0, objfile
);
1620 current_objfile
= NULL
;
1622 /* Record the toc offset value of this symbol table into ldinfo structure.
1623 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
1624 this information would be file auxiliary header. */
1626 #ifndef FAKING_RS6000
1627 xcoff_add_toc_to_loadinfo (toc_offset
);
1631 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1632 (SYMBOL2) = (struct symbol *) \
1633 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
1634 *(SYMBOL2) = *(SYMBOL1);
1637 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1638 (ALLOCED) ? (NAME) : obstack_copy0 (&objfile->symbol_obstack, (NAME), strlen (NAME));
1641 /* process one xcoff symbol. */
1643 static struct symbol
*
1644 process_xcoff_symbol (cs
, objfile
)
1645 register struct coff_symbol
*cs
;
1646 struct objfile
*objfile
;
1648 struct symbol onesymbol
;
1649 register struct symbol
*sym
= &onesymbol
;
1650 struct symbol
*sym2
= NULL
;
1652 char *name
, *pp
, *qq
;
1653 int struct_and_type_combined
;
1660 bzero (sym
, sizeof (struct symbol
));
1662 /* default assumptions */
1663 SYMBOL_VALUE (sym
) = cs
->c_value
;
1664 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1666 if (ISFCN (cs
->c_type
)) {
1668 /* At this point, we don't know the type of the function and assume it
1669 is int. This will be patched with the type from its stab entry later
1670 on in patch_block_stabs () */
1672 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1673 SYMBOL_TYPE (sym
) = lookup_function_type (lookup_fundamental_type (objfile
, FT_INTEGER
));
1675 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1676 SYMBOL_DUP (sym
, sym2
);
1678 if (cs
->c_sclass
== C_EXT
)
1679 add_symbol_to_list (sym2
, &global_symbols
);
1680 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1681 add_symbol_to_list (sym2
, &file_symbols
);
1686 /* in case we can't figure out the type, default is `int'. */
1687 SYMBOL_TYPE (sym
) = lookup_fundamental_type (objfile
, FT_INTEGER
);
1689 switch (cs
->c_sclass
)
1693 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1694 add_stab_to_list (name
, &global_stabs
);
1696 add_stab_to_list (name
, &file_stabs
);
1700 case C_DECL
: /* a type decleration?? */
1702 #if defined(NO_TYPEDEFS) || defined(NO_DEFINE_SYMBOL)
1703 qq
= (char*) strchr (name
, ':');
1704 if (!qq
) /* skip if there is no ':' */
1707 nameless
= (qq
== name
);
1709 struct_and_type_combined
= (qq
[1] == 'T' && qq
[2] == 't');
1710 pp
= qq
+ (struct_and_type_combined
? 3 : 2);
1713 /* To handle GNU C++ typename abbreviation, we need to be able to fill
1714 in a type's name as soon as space for that type is allocated. */
1716 if (struct_and_type_combined
&& name
!= qq
) {
1719 struct type
*tmp_type
;
1722 read_type_number (&tmp_pp
, typenums
);
1723 tmp_type
= dbx_alloc_type (typenums
, objfile
);
1725 if (tmp_type
&& !TYPE_NAME (tmp_type
) && !nameless
)
1726 TYPE_NAME (tmp_type
) = SYMBOL_NAME (sym
) =
1727 obsavestring (name
, qq
-name
,
1728 &objfile
->symbol_obstack
);
1730 ttype
= SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
1732 /* if there is no name for this typedef, you don't have to keep its
1733 symbol, since nobody could ask for it. Otherwise, build a symbol
1734 and add it into symbol_list. */
1740 /* Transarc wants to eliminate type definitions from the symbol table.
1741 Limited debugging capabilities, but faster symbol table processing
1742 and less memory usage. Note that tag definitions (starting with
1743 'T') will remain intact. */
1745 if (qq
[1] != 'T' && (!TYPE_NAME (ttype
) || *(TYPE_NAME (ttype
)) == '\0')) {
1747 if (SYMBOL_NAME (sym
))
1748 TYPE_NAME (ttype
) = SYMBOL_NAME (sym
);
1750 TYPE_NAME (ttype
) = obsavestring (name
, qq
-name
);
1755 #endif /* !NO_TYPEDEFS */
1757 /* read_type() will return null if type (or tag) definition was
1758 unnnecessarily duplicated. Also, if the symbol doesn't have a name,
1759 there is no need to keep it in symbol table. */
1760 /* The above argument no longer valid. read_type() never returns NULL. */
1765 /* if there is no name for this typedef, you don't have to keep its
1766 symbol, since nobody could ask for it. Otherwise, build a symbol
1767 and add it into symbol_list. */
1770 SYMBOL_NAMESPACE (sym
) = STRUCT_NAMESPACE
;
1771 else if (qq
[1] == 't')
1772 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1774 warning ("Unrecognized stab string.\n");
1778 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1779 if (!SYMBOL_NAME (sym
))
1780 SYMBOL_NAME (sym
) = obsavestring (name
, qq
-name
);
1782 SYMBOL_DUP (sym
, sym2
);
1784 (sym2
, within_function
? &local_symbols
: &file_symbols
);
1786 /* For a combination of struct and type, add one more symbol
1789 if (struct_and_type_combined
) {
1790 SYMBOL_DUP (sym
, sym2
);
1791 SYMBOL_NAMESPACE (sym2
) = VAR_NAMESPACE
;
1793 (sym2
, within_function
? &local_symbols
: &file_symbols
);
1796 /* assign a name to the type node. */
1798 if (!TYPE_NAME (ttype
) || *(TYPE_NAME (ttype
)) == '\0') {
1799 if (struct_and_type_combined
)
1800 TYPE_NAME (ttype
) = SYMBOL_NAME (sym
);
1801 else if (qq
[1] == 'T') /* struct namespace */
1802 TYPE_NAME (ttype
) = concat (
1803 TYPE_CODE (ttype
) == TYPE_CODE_UNION
? "union " :
1804 TYPE_CODE (ttype
) == TYPE_CODE_STRUCT
? "struct " : "enum ",
1805 SYMBOL_NAME (sym
), NULL
);
1809 #else /* !NO_DEFINE_SYMBOL */
1810 return define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1814 add_stab_to_list (name
, &global_stabs
);
1820 #ifdef NO_DEFINE_SYMBOL
1821 if (*name
== ':' || (pp
= (char *) strchr (name
, ':')) == NULL
)
1823 SYMBOL_NAME (sym
) = obsavestring (name
, pp
-name
, &objfile
-> symbol_obstack
);
1824 SYMBOL_CLASS (sym
) = (cs
->c_sclass
== C_PSYM
) ? LOC_ARG
: LOC_REGPARM
;
1826 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
1827 SYMBOL_DUP (sym
, sym2
);
1828 add_symbol_to_list (sym2
, &local_symbols
);
1831 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1832 SYMBOL_CLASS (sym
) = (cs
->c_sclass
== C_PSYM
) ? LOC_ARG
: LOC_REGPARM
;
1838 #ifdef NO_DEFINE_SYMBOL
1839 if (*name
== ':' || (pp
= (char *) strchr (name
, ':')) == NULL
)
1841 SYMBOL_NAME (sym
) = obsavestring (name
, pp
-name
, &objfile
-> symbol_obstack
);
1842 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1843 SYMBOL_VALUE (sym
) += static_block_base
;
1845 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
1846 SYMBOL_DUP (sym
, sym2
);
1848 (sym2
, within_function
? &local_symbols
: &file_symbols
);
1851 /* If we are going to use Sun dbx's define_symbol(), we need to
1852 massage our stab string a little. Change 'V' type to 'S' to be
1853 comparible with Sun. */
1855 if (*name
== ':' || (pp
= (char *) index (name
, ':')) == NULL
)
1859 if (*pp
== 'V') *pp
= 'S';
1860 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1861 SYMBOL_VALUE (sym
) += static_block_base
;
1866 if (*name
== ':' || (pp
= (char *) strchr (name
, ':')) == NULL
)
1868 SYMBOL_NAME (sym
) = obsavestring (name
, pp
-name
, &objfile
-> symbol_obstack
);
1869 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1871 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
1872 SYMBOL_DUP (sym
, sym2
);
1873 add_symbol_to_list (sym2
, &local_symbols
);
1877 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1878 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1879 SYMBOL_DUP (sym
, sym2
);
1880 add_symbol_to_list (sym2
, &local_symbols
);
1884 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1885 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1886 SYMBOL_DUP (sym
, sym2
);
1887 add_symbol_to_list (sym2
, &global_symbols
);
1891 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1892 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1893 SYMBOL_DUP (sym
, sym2
);
1895 (sym2
, within_function
? &local_symbols
: &file_symbols
);
1899 printf ("ERROR! C_REG is not fully implemented!\n");
1900 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1901 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1902 SYMBOL_DUP (sym
, sym2
);
1903 add_symbol_to_list (sym2
, &local_symbols
);
1907 pp
= (char*) strchr (name
, ':');
1908 #ifdef NO_DEFINE_SYMBOL
1909 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1910 SYMBOL_VALUE (sym
) = STAB_REG_TO_REGNUM (cs
->c_value
);
1912 SYMBOL_NAME (sym
) = obsavestring (name
, pp
-name
, &objfile
-> symbol_obstack
);
1915 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
1918 /* else this is not a stab entry, suppose the type is either
1919 `int' or `float', depending on the register class. */
1921 SYMBOL_TYPE (sym
) = (SYMBOL_VALUE (sym
) < 32)
1922 ? lookup_fundamental_type (objfile
, FT_INTEGER
)
1923 : lookup_fundamental_type (objfile
, FT_FLOAT
);
1925 SYMBOL_DUP (sym
, sym2
);
1926 add_symbol_to_list (sym2
, &local_symbols
);
1930 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1934 complain (&rsym_complaint
, name
);
1940 complain (&storclass_complaint
, cs
->c_sclass
);
1947 /* Get value corresponding to symbol number symno in symtbl. */
1950 read_symbol_nvalue (symno
)
1953 struct internal_syment symbol
[1];
1955 if (symno
< 0 || symno
>= symtbl_num_syms
)
1957 struct complaint msg
=
1958 {"Invalid symbol offset", 0, 0};
1962 bfd_coff_swap_sym_in (symfile_bfd
, symtbl
+ (symno
*local_symesz
), symbol
);
1963 return symbol
->n_value
;
1967 /* Find the address of the function corresponding to symno, where
1968 symno is the symbol pointed to by the linetable. */
1971 read_symbol_lineno (symno
)
1974 struct internal_syment symbol
[1];
1975 union internal_auxent main_aux
[1];
1977 /* Note that just searching for a short distance (e.g. 50 symbols)
1978 is not enough, at least in the following case.
1981 [many .stabx entries]
1982 [a few functions, referring to foo]
1986 What happens here is that the assembler moves the .stabx entries
1987 to right before the ".bf" for foo, but the symbol for "foo" is before
1988 all the stabx entries. See PR gdb/2222. */
1989 while (symno
< symtbl_num_syms
) {
1990 bfd_coff_swap_sym_in (symfile_bfd
,
1991 symtbl
+ (symno
*local_symesz
), symbol
);
1992 if (symbol
->n_sclass
== C_FCN
&& STREQ (symbol
->n_name
, ".bf"))
1994 symno
+= symbol
->n_numaux
+1;
1997 complain (&bf_notfound_complaint
);
2001 /* take aux entry and return its lineno */
2003 bfd_coff_swap_aux_in (symfile_bfd
, symtbl
+(symno
*local_symesz
),
2004 symbol
->n_type
, symbol
->n_sclass
, main_aux
);
2006 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
2009 /* Support for line number handling */
2011 /* This function is called for every section; it finds the outer limits
2012 * of the line table (minimum and maximum file offset) so that the
2013 * mainline code can read the whole thing for efficiency.
2016 find_linenos(abfd
, asect
, vpinfo
)
2021 struct coff_symfile_info
*info
;
2023 file_ptr offset
, maxoff
;
2025 count
= asect
->lineno_count
;
2027 if (!STREQ (asect
->name
, ".text") || count
== 0)
2030 size
= count
* coff_data (symfile_bfd
)->local_linesz
;
2031 info
= (struct coff_symfile_info
*)vpinfo
;
2032 offset
= asect
->line_filepos
;
2033 maxoff
= offset
+ size
;
2035 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
2036 info
->min_lineno_offset
= offset
;
2038 if (maxoff
> info
->max_lineno_offset
)
2039 info
->max_lineno_offset
= maxoff
;
2043 /* Read in all the line numbers for fast lookups later. Leave them in
2044 external (unswapped) format in memory; we'll swap them as we enter
2045 them into GDB's data structures. */
2048 init_lineno (abfd
, offset
, size
)
2055 if (bfd_seek(abfd
, offset
, L_SET
) < 0)
2058 linetab
= (char *) xmalloc(size
);
2060 val
= bfd_read(linetab
, 1, size
, abfd
);
2064 linetab_offset
= offset
;
2065 linetab_size
= size
;
2066 make_cleanup (free
, linetab
); /* Be sure it gets de-allocated. */
2070 /* dbx allows the text of a symbol name to be continued into the
2071 next symbol name! When such a continuation is encountered
2072 (a \ at the end of the text of a name)
2073 call this function to get the continuation. */
2074 /* So far, I haven't seen this happenning xlc output. I doubt we'll need this
2077 #undef next_symbol_text
2078 #define next_symbol_text() \
2079 printf ("Gdb Error: symbol names on multiple lines not implemented.\n")
2083 xcoff_new_init (objfile
)
2084 struct objfile
*objfile
;
2089 /* xcoff_symfile_init()
2090 is the xcoff-specific initialization routine for reading symbols.
2091 It is passed an objfile which contains, among other things,
2092 the BFD for the file whose symbols are being read, and a slot for
2093 a pointer to "private data" which we fill with cookies and other
2094 treats for xcoff_symfile_read().
2096 We will only be called if this is an XCOFF or XCOFF-like file.
2097 BFD handles figuring out the format of the file, and code in symfile.c
2098 uses BFD's determination to vector to us.
2100 The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
2103 xcoff_symfile_init (objfile
)
2104 struct objfile
*objfile
;
2106 bfd
*abfd
= objfile
->obfd
;
2108 /* Allocate struct to keep track of the symfile */
2109 objfile
-> sym_private
= xmmalloc (objfile
-> md
,
2110 sizeof (struct coff_symfile_info
));
2111 init_entry_point_info (objfile
);
2114 /* Perform any local cleanups required when we are done with a particular
2115 objfile. I.E, we are in the process of discarding all symbol information
2116 for an objfile, freeing up all memory held for it, and unlinking the
2117 objfile struct from the global list of known objfiles. */
2120 xcoff_symfile_finish (objfile
)
2121 struct objfile
*objfile
;
2123 if (objfile
-> sym_private
!= NULL
)
2125 mfree (objfile
-> md
, objfile
-> sym_private
);
2128 /* Start with a fresh include table for the next objfile. */
2135 inclIndx
= inclLength
= inclDepth
= 0;
2140 init_stringtab(abfd
, offset
, objfile
)
2143 struct objfile
*objfile
;
2147 unsigned char lengthbuf
[4];
2149 if (bfd_seek(abfd
, offset
, L_SET
) < 0)
2152 val
= bfd_read((char *)lengthbuf
, 1, sizeof lengthbuf
, abfd
);
2153 length
= bfd_h_get_32(abfd
, lengthbuf
);
2155 /* If no string table is needed, then the file may end immediately
2156 after the symbols. Just return with `strtbl' set to null. */
2158 if (val
!= sizeof length
|| length
< sizeof length
)
2161 /* Allocate string table from symbol_obstack. We will need this table
2162 as long as we have its symbol table around. */
2164 strtbl
= (char*) obstack_alloc (&objfile
->symbol_obstack
, length
);
2168 bcopy(&length
, strtbl
, sizeof length
);
2169 if (length
== sizeof length
)
2172 val
= bfd_read(strtbl
+ sizeof length
, 1, length
- sizeof length
, abfd
);
2174 if (val
!= length
- sizeof length
|| strtbl
[length
- 1] != '\0')
2181 init_debugsection(abfd
)
2184 register sec_ptr secp
;
2185 bfd_size_type length
;
2192 secp
= bfd_get_section_by_name(abfd
, ".debug");
2196 if (!(length
= bfd_section_size(abfd
, secp
)))
2199 debugsec
= (char *) xmalloc ((unsigned)length
);
2200 if (debugsec
== NULL
)
2203 if (!bfd_get_section_contents(abfd
, secp
, debugsec
, (file_ptr
) 0, length
)) {
2204 printf ("Can't read .debug section from symbol file\n");
2219 /* xcoff version of symbol file read. */
2222 xcoff_symfile_read (objfile
, section_offset
, mainline
)
2223 struct objfile
*objfile
;
2224 struct section_offset
*section_offset
;
2227 int num_symbols
; /* # of symbols */
2228 file_ptr symtab_offset
; /* symbol table and */
2229 file_ptr stringtab_offset
; /* string table file offsets */
2232 struct coff_symfile_info
*info
;
2235 info
= (struct coff_symfile_info
*) objfile
-> sym_private
;
2236 symfile_bfd
= abfd
= objfile
->obfd
;
2237 name
= objfile
->name
;
2239 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2240 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2241 stringtab_offset
= symtab_offset
+
2242 num_symbols
* coff_data(abfd
)->local_symesz
;
2244 info
->min_lineno_offset
= 0;
2245 info
->max_lineno_offset
= 0;
2246 bfd_map_over_sections (abfd
, find_linenos
, info
);
2248 /* FIXME! This stuff should move into symfile_init */
2249 if (info
->min_lineno_offset
!= 0
2250 && info
->max_lineno_offset
> info
->min_lineno_offset
) {
2252 /* only read in the line # table if one exists */
2253 val
= init_lineno(abfd
, info
->min_lineno_offset
,
2254 (int) (info
->max_lineno_offset
- info
->min_lineno_offset
));
2257 error("\"%s\": error reading line numbers\n", name
);
2260 if (num_symbols
> 0)
2262 val
= init_stringtab(abfd
, stringtab_offset
, objfile
);
2264 error ("\"%s\": can't get string table", name
);
2267 if (init_debugsection(abfd
) < 0) {
2268 error ("Error reading .debug section of `%s'\n", name
);
2272 /* Position to read the symbol table. Do not read it all at once. */
2273 val
= bfd_seek(abfd
, symtab_offset
, L_SET
);
2275 perror_with_name(name
);
2277 if (bfd_tell(abfd
) != symtab_offset
)
2280 init_minimal_symbol_collection ();
2281 make_cleanup (discard_minimal_symbols
, 0);
2283 #ifndef FAKING_RS6000
2284 /* Initialize load info structure. */
2286 xcoff_init_loadinfo ();
2289 /* Now that the executable file is positioned at symbol table,
2290 process it and define symbols accordingly. */
2292 read_xcoff_symtab(objfile
, num_symbols
);
2294 /* Free debug section. */
2295 free_debugsection ();
2297 /* Sort symbols alphabetically within each block. */
2300 /* Install any minimal symbols that have been collected as the current
2301 minimal symbols for this objfile. */
2303 install_minimal_symbols (objfile
);
2305 /* Make a default for file to list. */
2306 select_source_symtab (0);
2309 /* XCOFF-specific parsing routine for section offsets.
2310 Plain and simple for now. */
2313 struct section_offsets
*
2314 xcoff_symfile_offsets (objfile
, addr
)
2315 struct objfile
*objfile
;
2318 struct section_offsets
*section_offsets
;
2321 section_offsets
= (struct section_offsets
*)
2322 obstack_alloc (&objfile
-> psymbol_obstack
,
2323 sizeof (struct section_offsets
) +
2324 sizeof (section_offsets
->offsets
) * (SECT_OFF_MAX
-1));
2326 for (i
= 0; i
< SECT_OFF_MAX
; i
++)
2327 ANOFFSET (section_offsets
, i
) = addr
;
2329 return section_offsets
;
2331 /* Register our ability to parse symbols for xcoff BFD files. */
2333 static struct sym_fns xcoff_sym_fns
=
2335 "aixcoff-rs6000", /* sym_name: name or name prefix of BFD target type */
2336 15, /* sym_namelen: number of significant sym_name chars */
2337 xcoff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2338 xcoff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2339 xcoff_symfile_read
, /* sym_read: read a symbol file into symtab */
2340 xcoff_symfile_finish
, /* sym_finish: finished with file, cleanup */
2341 xcoff_symfile_offsets
, /* sym_offsets: xlate offsets ext->int form */
2342 NULL
/* next: pointer to next struct sym_fns */
2346 _initialize_xcoffread ()
2348 add_symtab_fns(&xcoff_sym_fns
);
2350 /* Initialize symbol template later used for arguments. */
2351 SYMBOL_NAME (&parmsym
) = "";
2352 SYMBOL_INIT_LANGUAGE_SPECIFIC (&parmsym
, language_c
);
2353 SYMBOL_NAMESPACE (&parmsym
) = VAR_NAMESPACE
;
2354 SYMBOL_CLASS (&parmsym
) = LOC_ARG
;
2355 /* Its other fields are zero, or are filled in later. */