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 #include <sys/types.h>
37 #include <sys/param.h>
42 #include <sys/debug.h>
44 #include "coff/internal.h" /* FIXME, internal data from BFD */
45 #include "libcoff.h" /* FIXME, internal data from BFD */
46 #include "coff/rs6000.h" /* FIXME, raw file-format guts of xcoff */
53 #include "stabsread.h"
54 #include "complaints.h"
56 /* For interface with stabsread.c. */
57 #include "aout/stab_gnu.h"
59 /* Simplified internal version of coff symbol table information */
63 int c_symnum
; /* symbol number of this entry */
64 int c_naux
; /* 0 if syment only, 1 if syment + auxent */
66 unsigned char c_sclass
;
71 /* The COFF line table, in raw form. */
72 static char *linetab
= NULL
; /* Its actual contents */
73 static long linetab_offset
; /* Its offset in the file */
74 static unsigned long linetab_size
; /* Its size */
76 /* last function's saved coff symbol `cs' */
78 static struct coff_symbol fcn_cs_saved
;
80 static bfd
*symfile_bfd
;
82 /* Core address of start and end of text of current source file.
83 This is calculated from the first function seen after a C_FILE
87 static CORE_ADDR cur_src_end_addr
;
89 /* Core address of the end of the first object file. */
91 static CORE_ADDR first_object_file_end
;
93 /* pointer to the string table */
96 /* length of the string table */
97 static int strtbl_len
;
99 /* pointer to debug section */
100 static char *debugsec
;
102 /* pointer to the a.out symbol table */
105 /* Number of symbols in symtbl. */
106 static int symtbl_num_syms
;
108 /* initial symbol-table-debug-string vector length */
110 #define INITIAL_STABVECTOR_LENGTH 40
112 /* Nonzero if within a function (so symbols should be local,
113 if nothing says specifically). */
117 /* Local variables that hold the shift and mask values for the
118 COFF file that we are currently reading. These come back to us
119 from BFD, and are referenced by their macro names, as well as
120 internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
121 macros from ../internalcoff.h . */
123 static unsigned local_n_btshft
;
124 static unsigned local_n_tmask
;
127 #define N_BTSHFT local_n_btshft
129 #define N_TMASK local_n_tmask
131 /* Local variables that hold the sizes in the file of various COFF structures.
132 (We only need to know this to read them from the file -- BFD will then
133 translate the data in them, into `internal_xxx' structs in the right
134 byte order, alignment, etc.) */
136 static unsigned local_symesz
;
138 struct coff_symfile_info
{
139 file_ptr min_lineno_offset
; /* Where in file lowest line#s are */
140 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file */
143 static struct complaint rsym_complaint
=
144 {"Non-stab C_RSYM `%s' needs special handling", 0, 0};
146 static struct complaint storclass_complaint
=
147 {"Unexpected storage class: %d", 0, 0};
149 static struct complaint bf_notfound_complaint
=
150 {"line numbers off, `.bf' symbol not found", 0, 0};
153 enter_line_range
PARAMS ((struct subfile
*, unsigned, unsigned,
154 CORE_ADDR
, CORE_ADDR
, unsigned *));
157 free_debugsection
PARAMS ((void));
160 init_debugsection
PARAMS ((bfd
*));
163 init_stringtab
PARAMS ((bfd
*, file_ptr
, struct objfile
*));
166 xcoff_symfile_init
PARAMS ((struct objfile
*));
169 xcoff_new_init
PARAMS ((struct objfile
*));
172 struct section_offset
;
176 xcoff_symfile_read
PARAMS ((struct objfile
*, struct section_offset
*, int));
179 xcoff_symfile_finish
PARAMS ((struct objfile
*));
181 static struct section_offsets
*
182 xcoff_symfile_offsets
PARAMS ((struct objfile
*, CORE_ADDR
));
185 init_lineno
PARAMS ((bfd
*, file_ptr
, int));
188 free_linetab
PARAMS ((void));
191 find_linenos
PARAMS ((bfd
*, sec_ptr
, PTR
));
194 read_symbol
PARAMS ((struct internal_syment
*, int));
197 read_symbol_lineno
PARAMS ((int));
200 read_symbol_nvalue
PARAMS ((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
**));
211 /* add a given stab string into given stab vector. */
214 add_stab_to_list (stabname
, stabvector
)
216 struct pending_stabs
**stabvector
;
218 if ( *stabvector
== NULL
) {
219 *stabvector
= (struct pending_stabs
*)
220 xmalloc (sizeof (struct pending_stabs
) +
221 INITIAL_STABVECTOR_LENGTH
* sizeof (char*));
222 (*stabvector
)->count
= 0;
223 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
225 else if ((*stabvector
)->count
>= (*stabvector
)->length
) {
226 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
227 *stabvector
= (struct pending_stabs
*)
228 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
229 (*stabvector
)->length
* sizeof (char*));
231 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
234 /* Linenos are processed on a file-by-file basis.
238 1) xlc (IBM's native c compiler) postpones static function code
239 emission to the end of a compilation unit. This way it can
240 determine if those functions (statics) are needed or not, and
241 can do some garbage collection (I think). This makes line
242 numbers and corresponding addresses unordered, and we end up
243 with a line table like:
260 and that breaks gdb's binary search on line numbers, if the
261 above table is not sorted on line numbers. And that sort
262 should be on function based, since gcc can emit line numbers
265 10 0x100 - for the init/test part of a for stmt.
268 10 0x400 - for the increment part of a for stmt.
270 arrange_linetable() will do this sorting.
272 2) aix symbol table might look like:
274 c_file // beginning of a new file
275 .bi // beginning of include file
276 .ei // end of include file
280 basically, .bi/.ei pairs do not necessarily encapsulate
281 their scope. They need to be recorded, and processed later
282 on when we come the end of the compilation unit.
283 Include table (inclTable) and process_linenos() handle
286 /* compare line table entry addresses. */
289 compare_lte (lte1
, lte2
)
290 struct linetable_entry
*lte1
, *lte2
;
292 return lte1
->pc
- lte2
->pc
;
295 /* Give a line table with function entries are marked, arrange its functions
296 in assending order and strip off function entry markers and return it in
297 a newly created table. If the old one is good enough, return the old one. */
298 /* FIXME: I think all this stuff can be replaced by just passing
299 sort_linevec = 1 to end_symtab. */
301 static struct linetable
*
302 arrange_linetable (oldLineTb
)
303 struct linetable
*oldLineTb
; /* old linetable */
306 newline
, /* new line count */
307 function_count
; /* # of functions */
309 struct linetable_entry
*fentry
; /* function entry vector */
310 int fentry_size
; /* # of function entries */
311 struct linetable
*newLineTb
; /* new line table */
313 #define NUM_OF_FUNCTIONS 20
315 fentry_size
= NUM_OF_FUNCTIONS
;
316 fentry
= (struct linetable_entry
*)
317 xmalloc (fentry_size
* sizeof (struct linetable_entry
));
319 for (function_count
=0, ii
=0; ii
<oldLineTb
->nitems
; ++ii
) {
321 if (oldLineTb
->item
[ii
].line
== 0) { /* function entry found. */
323 if (function_count
>= fentry_size
) { /* make sure you have room. */
325 fentry
= (struct linetable_entry
*)
326 xrealloc (fentry
, fentry_size
* sizeof (struct linetable_entry
));
328 fentry
[function_count
].line
= ii
;
329 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
334 if (function_count
== 0) {
338 else if (function_count
> 1)
339 qsort (fentry
, function_count
, sizeof(struct linetable_entry
), compare_lte
);
341 /* allocate a new line table. */
342 newLineTb
= (struct linetable
*)
344 (sizeof (struct linetable
) +
345 (oldLineTb
->nitems
- function_count
) * sizeof (struct linetable_entry
));
347 /* if line table does not start with a function beginning, copy up until
351 if (oldLineTb
->item
[0].line
!= 0)
353 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
354 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
356 /* Now copy function lines one by one. */
358 for (ii
=0; ii
< function_count
; ++ii
) {
359 for (jj
= fentry
[ii
].line
+ 1;
360 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
362 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
365 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
;
371 /* We try to detect the beginning of a compilation unit. That info will
372 be used as an entry in line number recording routines (enter_line_range) */
374 static unsigned first_fun_line_offset
;
375 static unsigned first_fun_bf
;
377 #define mark_first_line(OFFSET, SYMNUM) \
378 if (!first_fun_line_offset) { \
379 first_fun_line_offset = OFFSET; \
380 first_fun_bf = SYMNUM; \
384 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
385 following `IncludeChain'. At the end of each symtab (end_symtab),
386 we will determine if we should create additional symtab's to
387 represent if (the include files. */
390 typedef struct _inclTable
{
391 char *name
; /* include filename */
393 /* Offsets to the line table. end points to the last entry which is
394 part of this include file. */
397 struct subfile
*subfile
;
398 unsigned funStartLine
; /* start line # of its function */
401 #define INITIAL_INCLUDE_TABLE_LENGTH 20
402 static InclTable
*inclTable
; /* global include table */
403 static int inclIndx
; /* last entry to table */
404 static int inclLength
; /* table length */
405 static int inclDepth
; /* nested include depth */
409 record_include_begin (cs
)
410 struct coff_symbol
*cs
;
414 /* In xcoff, we assume include files cannot be nested (not in .c files
415 of course, but in corresponding .s files.). */
417 /* This can happen with old versions of GCC.
418 GCC 2.3.3-930426 does not exhibit this on a test case which
419 a user said produced the message for him. */
420 static struct complaint msg
= {"Nested C_BINCL symbols", 0, 0};
425 /* allocate an include file, or make room for the new entry */
426 if (inclLength
== 0) {
427 inclTable
= (InclTable
*)
428 xmalloc (sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
429 memset (inclTable
, '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
430 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
433 else if (inclIndx
>= inclLength
) {
434 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
435 inclTable
= (InclTable
*)
436 xrealloc (inclTable
, sizeof (InclTable
) * inclLength
);
437 memset (inclTable
+inclLength
-INITIAL_INCLUDE_TABLE_LENGTH
,
438 '\0', sizeof (InclTable
)*INITIAL_INCLUDE_TABLE_LENGTH
);
441 inclTable
[inclIndx
].name
= cs
->c_name
;
442 inclTable
[inclIndx
].begin
= cs
->c_value
;
447 record_include_end (cs
)
448 struct coff_symbol
*cs
;
454 static struct complaint msg
= {"Mismatched C_BINCL/C_EINCL pair", 0, 0};
458 pTbl
= &inclTable
[inclIndx
];
459 pTbl
->end
= cs
->c_value
;
466 /* given the start and end addresses of a compilation unit (or a csect, at times)
467 process its lines and create appropriate line vectors. */
470 process_linenos (start
, end
)
471 CORE_ADDR start
, end
;
476 struct subfile main_subfile
; /* subfile structure for the main
479 /* in the main source file, any time we see a function entry, we reset
480 this variable to function's absolute starting line number. All the
481 following line numbers in the function are relative to this, and
482 we record absolute line numbers in record_line(). */
484 int main_source_baseline
= 0;
490 if (!(offset
= first_fun_line_offset
))
491 goto return_after_cleanup
;
493 memset (&main_subfile
, '\0', sizeof (main_subfile
));
494 first_fun_line_offset
= 0;
497 /* All source lines were in the main source file. None in include files. */
499 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
500 &main_source_baseline
);
502 /* else, there was source with line numbers in include files */
505 main_source_baseline
= 0;
506 for (ii
=0; ii
< inclIndx
; ++ii
) {
508 struct subfile
*tmpSubfile
;
510 /* if there is main file source before include file, enter it. */
511 if (offset
< inclTable
[ii
].begin
) {
513 (&main_subfile
, offset
, inclTable
[ii
].begin
- LINESZ
, start
, 0,
514 &main_source_baseline
);
517 /* Have a new subfile for the include file */
519 tmpSubfile
= inclTable
[ii
].subfile
= (struct subfile
*)
520 xmalloc (sizeof (struct subfile
));
522 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
523 firstLine
= &(inclTable
[ii
].funStartLine
);
525 /* enter include file's lines now. */
526 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
527 inclTable
[ii
].end
, start
, 0, firstLine
);
529 offset
= inclTable
[ii
].end
+ LINESZ
;
532 /* all the include files' line have been processed at this point. Now,
533 enter remaining lines of the main file, if any left. */
534 if (offset
< (linetab_offset
+ linetab_size
+ 1 - LINESZ
)) {
535 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
536 &main_source_baseline
);
540 /* Process main file's line numbers. */
541 if (main_subfile
.line_vector
) {
542 struct linetable
*lineTb
, *lv
;
544 lv
= main_subfile
.line_vector
;
546 /* Line numbers are not necessarily ordered. xlc compilation will
547 put static function to the end. */
549 lineTb
= arrange_linetable (lv
);
551 current_subfile
->line_vector
= (struct linetable
*)
552 xrealloc (lv
, (sizeof (struct linetable
)
553 + lv
->nitems
* sizeof (struct linetable_entry
)));
558 current_subfile
->line_vector
= lineTb
;
561 current_subfile
->line_vector_length
=
562 current_subfile
->line_vector
->nitems
;
565 /* Now, process included files' line numbers. */
567 for (ii
=0; ii
< inclIndx
; ++ii
) {
569 if ( (inclTable
[ii
].subfile
)->line_vector
) { /* Useless if!!! FIXMEmgo */
570 struct linetable
*lineTb
, *lv
;
572 lv
= (inclTable
[ii
].subfile
)->line_vector
;
574 /* Line numbers are not necessarily ordered. xlc compilation will
575 put static function to the end. */
577 lineTb
= arrange_linetable (lv
);
581 /* For the same include file, we might want to have more than one subfile.
582 This happens if we have something like:
590 while foo.h including code in it. (stupid but possible)
591 Since start_subfile() looks at the name and uses an existing one if finds,
592 we need to provide a fake name and fool it. */
594 /* start_subfile (inclTable[ii].name, (char*)0); */
595 start_subfile (" ?", (char*)0);
596 free (current_subfile
->name
);
597 current_subfile
->name
= strdup (inclTable
[ii
].name
);
600 current_subfile
->line_vector
= (struct linetable
*)
601 xrealloc (lv
, (sizeof (struct linetable
)
602 + lv
->nitems
* sizeof (struct linetable_entry
)));
607 current_subfile
->line_vector
= lineTb
;
610 current_subfile
->line_vector_length
=
611 current_subfile
->line_vector
->nitems
;
612 start_subfile (pop_subfile (), (char*)0);
616 return_after_cleanup
:
618 /* We don't want to keep alloc/free'ing the global include file table. */
621 /* start with a fresh subfile structure for the next file. */
622 memset (&main_subfile
, '\0', sizeof (struct subfile
));
626 aix_process_linenos ()
628 /* process line numbers and enter them into line vector */
629 process_linenos (last_source_start_addr
, cur_src_end_addr
);
633 /* Enter a given range of lines into the line vector.
634 can be called in the following two ways:
635 enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
636 enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine)
638 endoffset points to the last line table entry that we should pay
642 enter_line_range (subfile
, beginoffset
, endoffset
, startaddr
, endaddr
, firstLine
)
643 struct subfile
*subfile
;
644 unsigned beginoffset
, endoffset
; /* offsets to line table */
645 CORE_ADDR startaddr
, endaddr
;
651 /* Do Byte swapping, if needed. FIXME! */
652 #define P_LINENO(PP) (*(unsigned short*)((struct external_lineno*)(PP))->l_lnno)
653 #define P_LINEADDR(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_paddr)
654 #define P_LINESYM(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_symndx)
656 pp
= &linetab
[beginoffset
- linetab_offset
];
657 if (endoffset
!= 0 && endoffset
- linetab_offset
>= linetab_size
)
659 static struct complaint msg
=
660 {"Bad line table offset in C_EINCL directive", 0, 0};
664 limit
= endoffset
? &linetab
[endoffset
- linetab_offset
]
665 : &linetab
[linetab_size
-1];
667 while (pp
<= limit
) {
669 /* find the address this line represents */
670 addr
= P_LINENO(pp
) ?
671 P_LINEADDR(pp
) : read_symbol_nvalue (P_LINESYM(pp
));
673 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
676 if (P_LINENO(pp
) == 0) {
677 *firstLine
= read_symbol_lineno (P_LINESYM(pp
));
678 record_line (subfile
, 0, addr
);
682 record_line (subfile
, *firstLine
+ P_LINENO(pp
), addr
);
689 int fsize
; /* file size */
690 int fixedparms
; /* number of fixed parms */
691 int floatparms
; /* number of float parms */
692 unsigned int parminfo
; /* parameter info.
693 See /usr/include/sys/debug.h
694 tbtable_ext.parminfo */
695 int framesize
; /* function frame size */
699 /* Given a function symbol, return its traceback information. */
702 retrieve_tracebackinfo (abfd
, textsec
, cs
)
705 struct coff_symbol
*cs
;
707 #define TBTABLE_BUFSIZ 2000
709 static TracebackInfo tbInfo
;
712 static char buffer
[TBTABLE_BUFSIZ
];
715 int bytesread
=0; /* total # of bytes read so far */
716 int bufferbytes
; /* number of bytes in the buffer */
718 int functionstart
= cs
->c_value
- textsec
->vma
;
720 memset (&tbInfo
, '\0', sizeof (tbInfo
));
722 /* keep reading blocks of data from the text section, until finding a zero
723 word and a traceback table. */
725 /* Note: The logical thing way to write this code would be to assign
726 to bufferbytes within the while condition. But that triggers a
727 compiler (xlc in AIX 3.2) bug, so simplify it... */
729 (TBTABLE_BUFSIZ
< (textsec
->_raw_size
- functionstart
- bytesread
) ?
730 TBTABLE_BUFSIZ
: (textsec
->_raw_size
- functionstart
- bytesread
));
732 && (bfd_get_section_contents
733 (abfd
, textsec
, buffer
,
734 (file_ptr
)(functionstart
+ bytesread
), bufferbytes
)))
736 bytesread
+= bufferbytes
;
737 pinsn
= (int*) buffer
;
739 /* if this is the first time we filled the buffer, retrieve function
742 if (bytesread
== bufferbytes
) {
744 /* skip over unrelated instructions */
746 if (*pinsn
== 0x7c0802a6) /* mflr r0 */
748 if ((*pinsn
& 0xfc00003e) == 0x7c000026) /* mfcr Rx */
750 if ((*pinsn
& 0xfc000000) == 0x48000000) /* bl foo, save fprs */
752 if ((*pinsn
& 0xfc1f0000) == 0xbc010000) /* stm Rx, NUM(r1) */
756 int tmp
= (*pinsn
>> 16) & 0xffff;
758 if (tmp
== 0x9421) { /* stu r1, NUM(r1) */
759 tbInfo
.framesize
= 0x10000 - (*pinsn
& 0xffff);
762 else if ((*pinsn
== 0x93e1fffc) || /* st r31,-4(r1) */
763 (tmp
== 0x9001)) /* st r0, NUM(r1) */
765 /* else, could not find a frame size. */
769 } while (++pinsn
&& *pinsn
);
771 if (!tbInfo
.framesize
)
776 /* look for a zero word. */
778 while (*pinsn
&& (pinsn
< (int*)(buffer
+ bufferbytes
- sizeof(int))))
781 if (pinsn
>= (int*)(buffer
+ bufferbytes
))
786 /* function size is the amount of bytes we have skipped so far. */
787 tbInfo
.fsize
= bytesread
- (buffer
+ bufferbytes
- (char*)pinsn
);
791 /* if we don't have the whole traceback table in the buffer, re-read
794 /* This is how much to read to get the traceback table.
795 8 bytes of the traceback table are always present, plus we
797 #define MIN_TBTABSIZ 12
799 if ((char*)pinsn
> (buffer
+ bufferbytes
- MIN_TBTABSIZ
)) {
801 /* In case if we are *very* close to the end of the text section
802 and cannot read properly from that point on, abort by returning
805 This could happen if the traceback table is only 8 bytes,
806 but we try to read 12 bytes of it.
807 Handle this case more graciously -- FIXME */
809 if (!bfd_get_section_contents (
810 abfd
, textsec
, buffer
,
811 (file_ptr
)(functionstart
+
812 bytesread
- (buffer
+ bufferbytes
- (char*)pinsn
)),MIN_TBTABSIZ
))
813 { printf_unfiltered ("Abnormal return!..\n"); return NULL
; }
815 ptb
= (struct tbtable
*)buffer
;
818 ptb
= (struct tbtable
*)pinsn
;
820 tbInfo
.fixedparms
= ptb
->tb
.fixedparms
;
821 tbInfo
.floatparms
= ptb
->tb
.floatparms
;
822 tbInfo
.parminfo
= ptb
->tb_ext
.parminfo
;
826 (TBTABLE_BUFSIZ
< (textsec
->_raw_size
- functionstart
- bytesread
) ?
827 TBTABLE_BUFSIZ
: (textsec
->_raw_size
- functionstart
- bytesread
));
833 /* Given a function symbol, return a pointer to its traceback table. */
836 retrieve_traceback (abfd
, textsec
, cs
, size
)
839 struct coff_symbol
*cs
;
840 int *size
; /* return function size */
842 #define TBTABLE_BUFSIZ 2000
843 #define MIN_TBTABSIZ 50 /* minimum buffer size to hold a
846 static char buffer
[TBTABLE_BUFSIZ
];
849 int bytesread
=0; /* total # of bytes read so far */
850 int bufferbytes
; /* number of bytes in the buffer */
852 int functionstart
= cs
->c_value
- textsec
->filepos
+ textsec
->vma
;
855 /* keep reading blocks of data from the text section, until finding a zero
856 word and a traceback table. */
858 while (bfd_get_section_contents (abfd
, textsec
, buffer
,
859 (file_ptr
)(functionstart
+ bytesread
),
861 (TBTABLE_BUFSIZ
< (textsec
->size
- functionstart
- bytesread
)) ?
862 TBTABLE_BUFSIZ
: (textsec
->size
- functionstart
- bytesread
))))
864 bytesread
+= bufferbytes
;
865 pinsn
= (int*) buffer
;
867 /* look for a zero word. */
869 while (*pinsn
&& (pinsn
< (int*)(buffer
+ bufferbytes
- sizeof(int))))
872 if (pinsn
>= (int*)(buffer
+ bufferbytes
))
877 /* function size is the amount of bytes we have skipped so far. */
878 *size
= bytesread
- (buffer
+ bufferbytes
- pinsn
);
882 /* if we don't have the whole traceback table in the buffer, re-read
885 if ((char*)pinsn
> (buffer
+ bufferbytes
- MIN_TBTABSIZ
)) {
887 /* In case if we are *very* close to the end of the text section
888 and cannot read properly from that point on, abort for now.
889 Handle this case more graciously -- FIXME */
891 if (!bfd_get_section_contents (
892 abfd
, textsec
, buffer
,
893 (file_ptr
)(functionstart
+
894 bytesread
- (buffer
+ bufferbytes
- pinsn
)),MIN_TBTABSIZ
))
895 /* abort (); */ { printf_unfiltered ("abort!!!\n"); return NULL
; }
897 return (struct tbtable
*)buffer
;
900 return (struct tbtable
*)pinsn
;
910 /* Save the vital information for use when closing off the current file.
911 NAME is the file name the symbols came from, START_ADDR is the first
912 text address for the file, and SIZE is the number of bytes of text. */
914 #define complete_symtab(name, start_addr) { \
915 last_source_file = savestring (name, strlen (name)); \
916 last_source_start_addr = start_addr; \
920 /* Refill the symbol table input buffer
921 and set the variables that control fetching entries from it.
922 Reports an error if no data available.
923 This function can read past the end of the symbol table
924 (into the string table) but this does no harm. */
926 /* Reading symbol table has to be fast! Keep the followings as macros, rather
929 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, ALLOCED, SECTION, OBJFILE) \
933 namestr = (NAME) + 1; \
936 obstack_copy0 (&objfile->symbol_obstack, (NAME) + 1, strlen ((NAME)+1)); \
939 prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
940 (char *)NULL, (SECTION), (OBJFILE)); \
941 misc_func_recorded = 1; \
945 /* A parameter template, used by ADD_PARM_TO_PENDING. It is initialized
946 in our initializer function at the bottom of the file, to avoid
947 dependencies on the exact "struct symbol" format. */
949 static struct symbol parmsym
;
951 /* Add a parameter to a given pending symbol list. */
953 #define ADD_PARM_TO_PENDING(PARM, VALUE, PTYPE, PENDING_SYMBOLS) \
955 PARM = (struct symbol *) \
956 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
958 SYMBOL_TYPE (PARM) = PTYPE; \
959 SYMBOL_VALUE (PARM) = VALUE; \
960 add_symbol_to_list (PARM, &PENDING_SYMBOLS); \
964 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
965 nested. At any given time, a symbol can only be in one static block.
966 This is the base address of current static block, zero if non exists. */
968 static int static_block_base
= 0;
970 /* Section number for the current static block. */
972 static int static_block_section
= -1;
974 /* true if space for symbol name has been allocated. */
976 static int symname_alloced
= 0;
978 /* read the whole symbol table of a given bfd. */
981 read_xcoff_symtab (objfile
, nsyms
)
982 struct objfile
*objfile
; /* Object file we're reading from */
983 int nsyms
; /* # of symbols */
985 bfd
*abfd
= objfile
->obfd
;
986 char *raw_symbol
; /* Pointer into raw seething symbol table */
987 char *raw_auxptr
; /* Pointer to first raw aux entry for sym */
988 sec_ptr textsec
; /* Pointer to text section */
989 TracebackInfo
*ptb
; /* Pointer to traceback table */
991 struct internal_syment symbol
[1];
992 union internal_auxent main_aux
[1];
993 struct coff_symbol cs
[1];
994 CORE_ADDR file_start_addr
= 0;
995 CORE_ADDR file_end_addr
= 0;
997 int next_file_symnum
= -1;
998 int just_started
= 1;
1000 int toc_offset
= 0; /* toc offset value in data section. */
1004 long fcn_line_offset
;
1007 struct coff_symbol fcn_stab_saved
;
1009 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1010 union internal_auxent fcn_aux_saved
;
1011 struct type
*fcn_type_saved
= NULL
;
1012 struct context_stack
*new;
1014 char *filestring
= " _start_ "; /* Name of the current file. */
1016 char *last_csect_name
; /* last seen csect's name and value */
1017 CORE_ADDR last_csect_val
;
1019 int misc_func_recorded
; /* true if any misc. function */
1021 current_objfile
= objfile
;
1023 /* Get the appropriate COFF "constants" related to the file we're handling. */
1024 N_TMASK
= coff_data (abfd
)->local_n_tmask
;
1025 N_BTSHFT
= coff_data (abfd
)->local_n_btshft
;
1026 local_symesz
= coff_data (abfd
)->local_symesz
;
1028 last_source_file
= NULL
;
1029 last_csect_name
= 0;
1031 misc_func_recorded
= 0;
1034 start_symtab (filestring
, (char *)NULL
, file_start_addr
);
1036 first_object_file_end
= 0;
1038 /* Allocate space for the entire symbol table at once, and read it
1039 all in. The bfd is already positioned at the beginning of
1040 the symbol table. */
1042 size
= coff_data (abfd
)->local_symesz
* nsyms
;
1043 symtbl
= xmalloc (size
);
1044 symtbl_num_syms
= nsyms
;
1046 val
= bfd_read (symtbl
, size
, 1, abfd
);
1048 perror_with_name ("reading symbol table");
1050 raw_symbol
= symtbl
;
1052 textsec
= bfd_get_section_by_name (abfd
, ".text");
1054 printf_unfiltered ("Unable to locate text section!\n");
1057 while (symnum
< nsyms
) {
1059 QUIT
; /* make this command interruptable. */
1061 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1062 /* read one symbol into `cs' structure. After processing the whole symbol
1063 table, only string table will be kept in memory, symbol table and debug
1064 section of xcoff will be freed. Thus we can mark symbols with names
1065 in string table as `alloced'. */
1069 /* Swap and align the symbol into a reasonable C structure. */
1070 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1072 cs
->c_symnum
= symnum
;
1073 cs
->c_naux
= symbol
->n_numaux
;
1074 if (symbol
->n_zeroes
) {
1075 symname_alloced
= 0;
1076 /* We must use the original, unswapped, name here so the name field
1077 pointed to by cs->c_name will persist throughout xcoffread. If
1078 we use the new field, it gets overwritten for each symbol. */
1079 cs
->c_name
= ((struct external_syment
*)raw_symbol
)->e
.e_name
;
1080 /* If it's exactly E_SYMNMLEN characters long it isn't
1082 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1085 p
= obstack_alloc (&objfile
->symbol_obstack
, E_SYMNMLEN
+ 1);
1086 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1087 p
[E_SYMNMLEN
] = '\0';
1089 symname_alloced
= 1;
1091 } else if (symbol
->n_sclass
& 0x80) {
1092 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1093 symname_alloced
= 0;
1094 } else { /* in string table */
1095 cs
->c_name
= strtbl
+ (int)symbol
->n_offset
;
1096 symname_alloced
= 1;
1098 cs
->c_value
= symbol
->n_value
;
1099 cs
->c_sclass
= symbol
->n_sclass
;
1100 cs
->c_secnum
= symbol
->n_scnum
;
1101 cs
->c_type
= (unsigned)symbol
->n_type
;
1103 raw_symbol
+= coff_data (abfd
)->local_symesz
;
1106 raw_auxptr
= raw_symbol
; /* Save addr of first aux entry */
1108 /* Skip all the auxents associated with this symbol. */
1109 for (ii
= symbol
->n_numaux
; ii
; --ii
) {
1110 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1115 /* if symbol name starts with ".$" or "$", ignore it. */
1116 if (cs
->c_name
[0] == '$' || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1119 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
) {
1120 if (last_source_file
)
1122 end_symtab (cur_src_end_addr
, 1, 0, objfile
, textsec
->target_index
);
1127 start_symtab ("_globals_", (char *)NULL
, (CORE_ADDR
)0);
1128 cur_src_end_addr
= first_object_file_end
;
1129 /* done with all files, everything from here on is globals */
1132 /* if explicitly specified as a function, treat is as one. */
1133 if (ISFCN(cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
) {
1134 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1136 goto function_entry_point
;
1139 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
) && cs
->c_naux
== 1)
1141 /* dealing with a symbol with a csect entry. */
1143 # define CSECT(PP) ((PP)->x_csect)
1144 # define CSECT_LEN(PP) (CSECT(PP).x_scnlen)
1145 # define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1146 # define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1147 # define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1149 /* Convert the auxent to something we can access. */
1150 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1153 switch (CSECT_SMTYP (main_aux
)) {
1156 continue; /* ignore all external references. */
1158 case XTY_SD
: /* a section description. */
1160 switch (CSECT_SCLAS (main_aux
)) {
1162 case XMC_PR
: /* a `.text' csect. */
1165 /* A program csect is seen. We have to allocate one
1166 symbol table for each program csect. Normally gdb
1167 prefers one symtab for each source file. In case
1168 of AIX, one source file might include more than one
1169 [PR] csect, and they don't have to be adjacent in
1170 terms of the space they occupy in memory. Thus, one
1171 single source file might get fragmented in the
1172 memory and gdb's file start and end address
1173 approach does not work! GCC (and I think xlc) seem
1174 to put all the code in the unnamed program csect. */
1176 if (last_csect_name
) {
1178 /* if no misc. function recorded in the last seen csect, enter
1179 it as a function. This will take care of functions like
1180 strcmp() compiled by xlc. */
1182 if (!misc_func_recorded
) {
1184 RECORD_MINIMAL_SYMBOL (last_csect_name
, last_csect_val
,
1185 mst_text
, alloced
, last_csect_sec
,
1190 complete_symtab (filestring
, file_start_addr
);
1191 cur_src_end_addr
= file_end_addr
;
1192 end_symtab (file_end_addr
, 1, 0, objfile
,
1193 textsec
->target_index
);
1196 /* Give all csects for this source file the same
1198 start_symtab (filestring
, (char *)NULL
, (CORE_ADDR
)0);
1201 /* If this is the very first csect seen, basically `__start'. */
1203 first_object_file_end
= cs
->c_value
+ CSECT_LEN (main_aux
);
1207 file_start_addr
= cs
->c_value
;
1208 file_end_addr
= cs
->c_value
+ CSECT_LEN (main_aux
);
1210 if (cs
->c_name
&& cs
->c_name
[0] == '.') {
1211 last_csect_name
= cs
->c_name
;
1212 last_csect_val
= cs
->c_value
;
1213 last_csect_sec
= cs
->c_secnum
;
1216 misc_func_recorded
= 0;
1222 /* If the section is not a data description, ignore it. Note that
1223 uninitialized data will show up as XTY_CM/XMC_RW pair. */
1227 warning ("More than one xmc_tc0 symbol found.");
1228 toc_offset
= cs
->c_value
;
1231 case XMC_TC
: /* ignore toc entries */
1232 default : /* any other XMC_XXX */
1236 break; /* switch CSECT_SCLAS() */
1240 /* a function entry point. */
1241 if (CSECT_SCLAS (main_aux
) == XMC_PR
) {
1243 function_entry_point
:
1244 RECORD_MINIMAL_SYMBOL (cs
->c_name
, cs
->c_value
, mst_text
,
1245 symname_alloced
, cs
->c_secnum
, objfile
);
1247 fcn_line_offset
= main_aux
->x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
1248 fcn_start_addr
= cs
->c_value
;
1250 /* save the function header info, which will be used
1251 when `.bf' is seen. */
1253 fcn_aux_saved
= *main_aux
;
1258 /* If function has two auxent, then debugging information is
1259 already available for it. Process traceback table for
1260 functions with only one auxent. */
1262 if (cs
->c_naux
== 1)
1263 ptb
= retrieve_tracebackinfo (abfd
, textsec
, cs
);
1265 else if (cs
->c_naux
!= 2)
1267 static struct complaint msg
=
1268 {"Expected one or two auxents for function", 0, 0};
1272 /* If there is traceback info, create and add parameters for it. */
1274 if (ptb
&& (ptb
->fixedparms
|| ptb
->floatparms
)) {
1276 int parmcnt
= ptb
->fixedparms
+ ptb
->floatparms
;
1277 char *parmcode
= (char*) &ptb
->parminfo
;
1278 int parmvalue
= ptb
->framesize
+ 0x18; /* sizeof(LINK AREA) == 0x18 */
1279 unsigned int ii
, mask
;
1281 for (ii
=0, mask
= 0x80000000; ii
<parmcnt
; ++ii
) {
1282 struct symbol
*parm
;
1284 if (ptb
->parminfo
& mask
) { /* float or double */
1286 if (ptb
->parminfo
& mask
) { /* double parm */
1288 (parm
, parmvalue
, builtin_type_double
, local_symbols
);
1289 parmvalue
+= sizeof (double);
1291 else { /* float parm */
1293 (parm
, parmvalue
, builtin_type_float
, local_symbols
);
1294 parmvalue
+= sizeof (float);
1297 else { /* fixed parm, use (int*) for hex rep. */
1298 ADD_PARM_TO_PENDING (parm
, parmvalue
,
1299 lookup_pointer_type (builtin_type_int
),
1301 parmvalue
+= sizeof (int);
1306 /* Fake this as a function. Needed in process_xcoff_symbol() */
1309 finish_block(process_xcoff_symbol (cs
, objfile
), &local_symbols
,
1310 pending_blocks
, cs
->c_value
,
1311 cs
->c_value
+ ptb
->fsize
, objfile
);
1315 /* shared library function trampoline code entry point. */
1316 else if (CSECT_SCLAS (main_aux
) == XMC_GL
) {
1318 /* record trampoline code entries as mst_unknown symbol. When we
1319 lookup mst symbols, we will choose mst_text over mst_unknown. */
1322 /* After the implementation of incremental loading of shared
1323 libraries, we don't want to access trampoline entries. This
1324 approach has a consequence of the necessity to bring the whole
1325 shared library at first, in order do anything with it (putting
1326 breakpoints, using malloc, etc). On the other side, this is
1327 consistient with gdb's behaviour on a SUN platform. */
1329 /* Trying to prefer *real* function entry over its trampoline,
1330 by assigning `mst_unknown' type to trampoline entries fails.
1331 Gdb treats those entries as chars. FIXME. */
1333 /* Recording this entry is necessary. Single stepping relies on
1334 this vector to get an idea about function address boundaries. */
1336 prim_record_minimal_symbol_and_info
1337 ("<trampoline>", cs
->c_value
, mst_unknown
,
1338 (char *)NULL
, cs
->c_secnum
, objfile
);
1341 /* record trampoline code entries as mst_unknown symbol. When we
1342 lookup mst symbols, we will choose mst_text over mst_unknown. */
1344 RECORD_MINIMAL_SYMBOL (cs
->c_name
, cs
->c_value
, mst_unknown
,
1345 symname_alloced
, objfile
);
1351 default : /* all other XTY_XXXs */
1353 } /* switch CSECT_SMTYP() */ }
1355 switch (cs
->c_sclass
) {
1359 /* see if the last csect needs to be recorded. */
1361 if (last_csect_name
&& !misc_func_recorded
) {
1363 /* if no misc. function recorded in the last seen csect, enter
1364 it as a function. This will take care of functions like
1365 strcmp() compiled by xlc. */
1368 RECORD_MINIMAL_SYMBOL (last_csect_name
, last_csect_val
,
1369 mst_text
, alloced
, last_csect_sec
, objfile
);
1372 /* c_value field contains symnum of next .file entry in table
1373 or symnum of first global after last .file. */
1375 next_file_symnum
= cs
->c_value
;
1377 /* complete symbol table for last object file containing
1378 debugging information. */
1380 /* Whether or not there was a csect in the previous file, we have to call
1381 `end_stabs' and `start_stabs' to reset type_vector,
1382 line_vector, etc. structures. */
1384 complete_symtab (filestring
, file_start_addr
);
1385 cur_src_end_addr
= file_end_addr
;
1386 end_symtab (file_end_addr
, 1, 0, objfile
, textsec
->target_index
);
1389 /* XCOFF, according to the AIX 3.2 documentation, puts the filename
1390 in cs->c_name. But xlc 1.3.0.2 has decided to do things the
1391 standard COFF way and put it in the auxent. We use the auxent if
1392 there is one, otherwise use the name. Simple enough. */
1394 filestring
= coff_getfilename (&main_aux
);
1396 filestring
= cs
->c_name
;
1399 start_symtab (filestring
, (char *)NULL
, (CORE_ADDR
)0);
1400 last_csect_name
= 0;
1402 /* reset file start and end addresses. A compilation unit with no text
1403 (only data) should have zero file boundaries. */
1404 file_start_addr
= file_end_addr
= 0;
1409 fcn_stab_saved
= *cs
;
1414 if (STREQ (cs
->c_name
, ".bf")) {
1416 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1419 within_function
= 1;
1421 mark_first_line (fcn_line_offset
, cs
->c_symnum
);
1423 new = push_context (0, fcn_start_addr
);
1425 new->name
= define_symbol
1426 (fcn_cs_saved
.c_value
, fcn_stab_saved
.c_name
, 0, 0, objfile
);
1427 if (new->name
!= NULL
)
1428 SYMBOL_SECTION (new->name
) = cs
->c_secnum
;
1430 else if (STREQ (cs
->c_name
, ".ef")) {
1432 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1435 /* the value of .ef is the address of epilogue code;
1436 not useful for gdb */
1437 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1438 contains number of lines to '}' */
1440 fcn_last_line
= main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1441 new = pop_context ();
1442 if (context_stack_depth
!= 0)
1443 error ("invalid symbol data; .bf/.ef/.bb/.eb symbol mismatch, at symbol %d.",
1446 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1448 fcn_cs_saved
.c_value
+
1449 fcn_aux_saved
.x_sym
.x_misc
.x_fsize
, objfile
);
1450 within_function
= 0;
1454 case C_BSTAT
: /* begin static block */
1456 struct internal_syment symbol
;
1458 read_symbol (&symbol
, cs
->c_value
);
1459 static_block_base
= symbol
.n_value
;
1460 static_block_section
= symbol
.n_scnum
;
1464 case C_ESTAT
: /* end of static block */
1465 static_block_base
= 0;
1466 static_block_section
= -1;
1469 case C_ARG
: /* These are not implemented. */
1475 printf_unfiltered ("ERROR: Unimplemented storage class: %d.\n", cs
->c_sclass
);
1478 case C_HIDEXT
: /* ignore these.. */
1483 case C_BINCL
: /* beginning of include file */
1485 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1486 order. Thus, when wee see them, we might not know enough info
1487 to process them. Thus, we'll be saving them into a table
1488 (inclTable) and postpone their processing. */
1490 record_include_begin (cs
);
1493 case C_EINCL
: /* end of include file */
1494 /* see the comment after case C_BINCL. */
1495 record_include_end (cs
);
1499 if (STREQ (cs
->c_name
, ".bb")) {
1501 new = push_context (depth
, cs
->c_value
);
1503 else if (STREQ (cs
->c_name
, ".eb")) {
1504 new = pop_context ();
1505 if (depth
!= new->depth
)
1506 error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.",
1510 if (local_symbols
&& context_stack_depth
> 0) {
1511 /* Make a block for the local symbols within. */
1512 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1513 new->start_addr
, cs
->c_value
, objfile
);
1515 local_symbols
= new->locals
;
1520 process_xcoff_symbol (cs
, objfile
);
1526 if (last_source_file
)
1528 end_symtab (cur_src_end_addr
, 1, 0, objfile
, textsec
->target_index
);
1533 current_objfile
= NULL
;
1535 /* Record the toc offset value of this symbol table into ldinfo structure.
1536 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
1537 this information would be file auxiliary header. */
1539 #ifndef FAKING_RS6000
1540 xcoff_add_toc_to_loadinfo (toc_offset
);
1544 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1545 (SYMBOL2) = (struct symbol *) \
1546 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
1547 *(SYMBOL2) = *(SYMBOL1);
1550 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1551 (ALLOCED) ? (NAME) : obstack_copy0 (&objfile->symbol_obstack, (NAME), strlen (NAME));
1554 /* process one xcoff symbol. */
1556 static struct symbol
*
1557 process_xcoff_symbol (cs
, objfile
)
1558 register struct coff_symbol
*cs
;
1559 struct objfile
*objfile
;
1561 struct symbol onesymbol
;
1562 register struct symbol
*sym
= &onesymbol
;
1563 struct symbol
*sym2
= NULL
;
1565 char *name
, *pp
, *qq
;
1566 int struct_and_type_combined
;
1573 memset (sym
, '\0', sizeof (struct symbol
));
1575 /* default assumptions */
1576 SYMBOL_VALUE (sym
) = cs
->c_value
;
1577 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1578 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1580 if (ISFCN (cs
->c_type
)) {
1582 /* At this point, we don't know the type of the function and assume it
1583 is int. This will be patched with the type from its stab entry later
1584 on in patch_block_stabs () */
1586 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1587 SYMBOL_TYPE (sym
) = lookup_function_type (lookup_fundamental_type (objfile
, FT_INTEGER
));
1589 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1590 SYMBOL_DUP (sym
, sym2
);
1592 if (cs
->c_sclass
== C_EXT
)
1593 add_symbol_to_list (sym2
, &global_symbols
);
1594 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1595 add_symbol_to_list (sym2
, &file_symbols
);
1600 /* in case we can't figure out the type, default is `int'. */
1601 SYMBOL_TYPE (sym
) = lookup_fundamental_type (objfile
, FT_INTEGER
);
1603 switch (cs
->c_sclass
)
1607 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1608 add_stab_to_list (name
, &global_stabs
);
1610 add_stab_to_list (name
, &file_stabs
);
1615 add_stab_to_list (name
, &global_stabs
);
1619 common_block_start (cs
->c_name
, objfile
);
1623 common_block_end (objfile
);
1627 complain (&storclass_complaint
, cs
->c_sclass
);
1635 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1638 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1644 /* For xlc (not GCC), the 'V' symbol descriptor is used for all
1645 statics and we need to distinguish file-scope versus function-scope
1646 using within_function. We do this by changing the string we pass
1647 to define_symbol to use 'S' where we need to, which is not necessarily
1648 super-clean, but seems workable enough. */
1650 if (*name
== ':' || (pp
= (char *) strchr(name
, ':')) == NULL
)
1654 if (*pp
== 'V' && !within_function
)
1656 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1659 SYMBOL_VALUE (sym
) += static_block_base
;
1660 SYMBOL_SECTION (sym
) = static_block_section
;
1665 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, N_LSYM
, objfile
);
1668 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1673 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1674 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1675 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1676 SYMBOL_DUP (sym
, sym2
);
1677 add_symbol_to_list (sym2
, &local_symbols
);
1681 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1682 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1683 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1684 SYMBOL_DUP (sym
, sym2
);
1685 add_symbol_to_list (sym2
, &global_symbols
);
1689 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1690 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1691 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1692 SYMBOL_DUP (sym
, sym2
);
1694 (sym2
, within_function
? &local_symbols
: &file_symbols
);
1698 printf_unfiltered ("ERROR! C_REG is not fully implemented!\n");
1699 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1700 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1701 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1702 SYMBOL_DUP (sym
, sym2
);
1703 add_symbol_to_list (sym2
, &local_symbols
);
1707 pp
= (char*) strchr (name
, ':');
1709 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1711 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1715 complain (&rsym_complaint
, name
);
1723 /* Set *SYMBOL to symbol number symno in symtbl. */
1725 read_symbol (symbol
, symno
)
1726 struct internal_syment
*symbol
;
1729 if (symno
< 0 || symno
>= symtbl_num_syms
)
1731 static struct complaint msg
=
1732 {"Invalid symbol offset", 0, 0};
1734 symbol
->n_value
= 0;
1735 symbol
->n_scnum
= -1;
1738 bfd_coff_swap_sym_in (symfile_bfd
, symtbl
+ (symno
*local_symesz
), symbol
);
1741 /* Get value corresponding to symbol number symno in symtbl. */
1744 read_symbol_nvalue (symno
)
1747 struct internal_syment symbol
[1];
1749 read_symbol (symbol
, symno
);
1750 return symbol
->n_value
;
1754 /* Find the address of the function corresponding to symno, where
1755 symno is the symbol pointed to by the linetable. */
1758 read_symbol_lineno (symno
)
1761 struct internal_syment symbol
[1];
1762 union internal_auxent main_aux
[1];
1764 /* Note that just searching for a short distance (e.g. 50 symbols)
1765 is not enough, at least in the following case.
1768 [many .stabx entries]
1769 [a few functions, referring to foo]
1773 What happens here is that the assembler moves the .stabx entries
1774 to right before the ".bf" for foo, but the symbol for "foo" is before
1775 all the stabx entries. See PR gdb/2222. */
1776 while (symno
< symtbl_num_syms
) {
1777 bfd_coff_swap_sym_in (symfile_bfd
,
1778 symtbl
+ (symno
*local_symesz
), symbol
);
1779 if (symbol
->n_sclass
== C_FCN
&& STREQ (symbol
->n_name
, ".bf"))
1781 symno
+= symbol
->n_numaux
+1;
1784 complain (&bf_notfound_complaint
);
1788 /* take aux entry and return its lineno */
1790 bfd_coff_swap_aux_in (symfile_bfd
, symtbl
+(symno
*local_symesz
),
1791 symbol
->n_type
, symbol
->n_sclass
, main_aux
);
1793 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1796 /* Support for line number handling */
1798 /* This function is called for every section; it finds the outer limits
1799 * of the line table (minimum and maximum file offset) so that the
1800 * mainline code can read the whole thing for efficiency.
1803 find_linenos(abfd
, asect
, vpinfo
)
1808 struct coff_symfile_info
*info
;
1810 file_ptr offset
, maxoff
;
1812 count
= asect
->lineno_count
;
1814 if (!STREQ (asect
->name
, ".text") || count
== 0)
1817 size
= count
* coff_data (symfile_bfd
)->local_linesz
;
1818 info
= (struct coff_symfile_info
*)vpinfo
;
1819 offset
= asect
->line_filepos
;
1820 maxoff
= offset
+ size
;
1822 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1823 info
->min_lineno_offset
= offset
;
1825 if (maxoff
> info
->max_lineno_offset
)
1826 info
->max_lineno_offset
= maxoff
;
1830 /* Read in all the line numbers for fast lookups later. Leave them in
1831 external (unswapped) format in memory; we'll swap them as we enter
1832 them into GDB's data structures. */
1835 init_lineno (abfd
, offset
, size
)
1844 if (bfd_seek(abfd
, offset
, L_SET
) < 0)
1847 linetab
= (char *) xmalloc(size
);
1849 val
= bfd_read(linetab
, 1, size
, abfd
);
1853 linetab_offset
= offset
;
1854 linetab_size
= size
;
1866 /* dbx allows the text of a symbol name to be continued into the
1867 next symbol name! When such a continuation is encountered
1868 (a \ at the end of the text of a name)
1869 call this function to get the continuation. */
1870 /* So far, I haven't seen this happenning xlc output. I doubt we'll need this
1873 #undef next_symbol_text
1874 #define next_symbol_text() \
1875 printf_unfiltered ("Gdb Error: symbol names on multiple lines not implemented.\n")
1879 xcoff_new_init (objfile
)
1880 struct objfile
*objfile
;
1885 /* xcoff_symfile_init()
1886 is the xcoff-specific initialization routine for reading symbols.
1887 It is passed an objfile which contains, among other things,
1888 the BFD for the file whose symbols are being read, and a slot for
1889 a pointer to "private data" which we fill with cookies and other
1890 treats for xcoff_symfile_read().
1892 We will only be called if this is an XCOFF or XCOFF-like file.
1893 BFD handles figuring out the format of the file, and code in symfile.c
1894 uses BFD's determination to vector to us.
1896 The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
1899 xcoff_symfile_init (objfile
)
1900 struct objfile
*objfile
;
1902 bfd
*abfd
= objfile
->obfd
;
1904 /* Allocate struct to keep track of the symfile */
1905 objfile
-> sym_private
= xmmalloc (objfile
-> md
,
1906 sizeof (struct coff_symfile_info
));
1907 init_entry_point_info (objfile
);
1910 /* Perform any local cleanups required when we are done with a particular
1911 objfile. I.E, we are in the process of discarding all symbol information
1912 for an objfile, freeing up all memory held for it, and unlinking the
1913 objfile struct from the global list of known objfiles. */
1916 xcoff_symfile_finish (objfile
)
1917 struct objfile
*objfile
;
1919 if (objfile
-> sym_private
!= NULL
)
1921 mfree (objfile
-> md
, objfile
-> sym_private
);
1924 /* Start with a fresh include table for the next objfile. */
1931 inclIndx
= inclLength
= inclDepth
= 0;
1936 init_stringtab(abfd
, offset
, objfile
)
1939 struct objfile
*objfile
;
1943 unsigned char lengthbuf
[4];
1945 if (bfd_seek(abfd
, offset
, L_SET
) < 0)
1948 val
= bfd_read((char *)lengthbuf
, 1, sizeof lengthbuf
, abfd
);
1949 length
= bfd_h_get_32(abfd
, lengthbuf
);
1951 /* If no string table is needed, then the file may end immediately
1952 after the symbols. Just return with `strtbl' set to null. */
1954 if (val
!= sizeof length
|| length
< sizeof length
)
1957 /* Allocate string table from symbol_obstack. We will need this table
1958 as long as we have its symbol table around. */
1960 strtbl
= (char*) obstack_alloc (&objfile
->symbol_obstack
, length
);
1964 memcpy(strtbl
, &length
, sizeof length
);
1965 if (length
== sizeof length
)
1968 val
= bfd_read(strtbl
+ sizeof length
, 1, length
- sizeof length
, abfd
);
1970 if (val
!= length
- sizeof length
|| strtbl
[length
- 1] != '\0')
1977 init_debugsection(abfd
)
1980 register sec_ptr secp
;
1981 bfd_size_type length
;
1988 secp
= bfd_get_section_by_name(abfd
, ".debug");
1992 if (!(length
= bfd_section_size(abfd
, secp
)))
1995 debugsec
= (char *) xmalloc ((unsigned)length
);
1996 if (debugsec
== NULL
)
1999 if (!bfd_get_section_contents(abfd
, secp
, debugsec
, (file_ptr
) 0, length
)) {
2000 printf_unfiltered ("Can't read .debug section from symbol file\n");
2015 /* xcoff version of symbol file read. */
2018 xcoff_symfile_read (objfile
, section_offset
, mainline
)
2019 struct objfile
*objfile
;
2020 struct section_offset
*section_offset
;
2023 int num_symbols
; /* # of symbols */
2024 file_ptr symtab_offset
; /* symbol table and */
2025 file_ptr stringtab_offset
; /* string table file offsets */
2028 struct coff_symfile_info
*info
;
2030 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2032 info
= (struct coff_symfile_info
*) objfile
-> sym_private
;
2033 symfile_bfd
= abfd
= objfile
->obfd
;
2034 name
= objfile
->name
;
2036 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2037 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2038 stringtab_offset
= symtab_offset
+
2039 num_symbols
* coff_data(abfd
)->local_symesz
;
2041 info
->min_lineno_offset
= 0;
2042 info
->max_lineno_offset
= 0;
2043 bfd_map_over_sections (abfd
, find_linenos
, info
);
2045 /* FIXME! This stuff should move into symfile_init */
2046 if (info
->min_lineno_offset
!= 0
2047 && info
->max_lineno_offset
> info
->min_lineno_offset
) {
2049 /* only read in the line # table if one exists */
2050 make_cleanup (free_linetab
, 0);
2051 val
= init_lineno(abfd
, info
->min_lineno_offset
,
2052 (int) (info
->max_lineno_offset
- info
->min_lineno_offset
));
2055 error("\"%s\": error reading line numbers\n", name
);
2058 if (num_symbols
> 0)
2060 val
= init_stringtab(abfd
, stringtab_offset
, objfile
);
2062 error ("\"%s\": can't get string table", name
);
2065 if (init_debugsection(abfd
) < 0) {
2066 error ("Error reading .debug section of `%s'\n", name
);
2070 /* Position to read the symbol table. Do not read it all at once. */
2071 val
= bfd_seek(abfd
, symtab_offset
, L_SET
);
2073 perror_with_name(name
);
2075 if (bfd_tell(abfd
) != symtab_offset
)
2078 init_minimal_symbol_collection ();
2079 make_cleanup (discard_minimal_symbols
, 0);
2081 #ifndef FAKING_RS6000
2082 /* Initialize load info structure. */
2084 xcoff_init_loadinfo ();
2087 /* Now that the executable file is positioned at symbol table,
2088 process it and define symbols accordingly. */
2090 read_xcoff_symtab(objfile
, num_symbols
);
2092 /* Free debug section. */
2093 free_debugsection ();
2095 /* Sort symbols alphabetically within each block. */
2098 for (s
= objfile
-> symtabs
; s
!= NULL
; s
= s
-> next
)
2100 sort_symtab_syms (s
);
2104 /* Install any minimal symbols that have been collected as the current
2105 minimal symbols for this objfile. */
2107 install_minimal_symbols (objfile
);
2109 do_cleanups (back_to
);
2112 /* XCOFF-specific parsing routine for section offsets. */
2114 static int largest_section
;
2117 note_one_section (abfd
, asect
, ptr
)
2122 if (asect
->target_index
> largest_section
)
2123 largest_section
= asect
->target_index
;
2127 struct section_offsets
*
2128 xcoff_symfile_offsets (objfile
, addr
)
2129 struct objfile
*objfile
;
2132 struct section_offsets
*section_offsets
;
2135 largest_section
= 0;
2136 bfd_map_over_sections (objfile
->obfd
, note_one_section
, NULL
);
2137 objfile
->num_sections
= largest_section
+ 1;
2138 section_offsets
= (struct section_offsets
*)
2140 (&objfile
-> psymbol_obstack
,
2141 sizeof (struct section_offsets
)
2142 + sizeof (section_offsets
->offsets
) * (objfile
->num_sections
));
2144 /* syms_from_objfile kindly subtracts from addr the bfd_section_vma
2145 of the .text section. This strikes me as wrong--whether the
2146 offset to be applied to symbol reading is relative to the start
2147 address of the section depends on the symbol format. In any
2148 event, this whole "addr" concept is pretty broken (it doesn't
2149 handle any section but .text sensibly), so just ignore the addr
2150 parameter and use 0. That matches the fact that xcoff_symfile_read
2151 ignores the section_offsets). */
2152 for (i
= 0; i
< objfile
->num_sections
; i
++)
2153 ANOFFSET (section_offsets
, i
) = 0;
2155 return section_offsets
;
2158 /* Register our ability to parse symbols for xcoff BFD files. */
2160 static struct sym_fns xcoff_sym_fns
=
2163 /* Because the bfd uses coff_flavour, we need to specially kludge
2164 the flavour. FIXME: coff and xcoff and fundamentally similar
2165 except for debug format, and we should see if we can merge this
2166 file with coffread.c. For example, the extra storage classes
2167 used for stabs could presumably be recognized in any COFF file. */
2169 (enum bfd_flavour
)-1,
2171 xcoff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2172 xcoff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2173 xcoff_symfile_read
, /* sym_read: read a symbol file into symtab */
2174 xcoff_symfile_finish
, /* sym_finish: finished with file, cleanup */
2175 xcoff_symfile_offsets
, /* sym_offsets: xlate offsets ext->int form */
2176 NULL
/* next: pointer to next struct sym_fns */
2180 _initialize_xcoffread ()
2182 add_symtab_fns(&xcoff_sym_fns
);
2184 /* Initialize symbol template later used for arguments. */
2185 SYMBOL_NAME (&parmsym
) = "";
2186 SYMBOL_INIT_LANGUAGE_SPECIFIC (&parmsym
, language_c
);
2187 SYMBOL_NAMESPACE (&parmsym
) = VAR_NAMESPACE
;
2188 SYMBOL_CLASS (&parmsym
) = LOC_ARG
;
2189 /* Its other fields are zero, or are filled in later. */