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 xcoff_symfile_read
PARAMS ((struct objfile
*, struct section_offsets
*, int));
175 xcoff_symfile_finish
PARAMS ((struct objfile
*));
177 static struct section_offsets
*
178 xcoff_symfile_offsets
PARAMS ((struct objfile
*, CORE_ADDR
));
181 init_lineno
PARAMS ((bfd
*, file_ptr
, int));
184 free_linetab
PARAMS ((void));
187 find_linenos
PARAMS ((bfd
*, sec_ptr
, PTR
));
190 read_symbol
PARAMS ((struct internal_syment
*, int));
193 read_symbol_lineno
PARAMS ((int));
196 read_symbol_nvalue
PARAMS ((int));
198 static struct symbol
*
199 process_xcoff_symbol
PARAMS ((struct coff_symbol
*, struct objfile
*));
202 read_xcoff_symtab
PARAMS ((struct objfile
*, int));
205 add_stab_to_list
PARAMS ((char *, struct pending_stabs
**));
207 /* add a given stab string into given stab vector. */
210 add_stab_to_list (stabname
, stabvector
)
212 struct pending_stabs
**stabvector
;
214 if ( *stabvector
== NULL
) {
215 *stabvector
= (struct pending_stabs
*)
216 xmalloc (sizeof (struct pending_stabs
) +
217 INITIAL_STABVECTOR_LENGTH
* sizeof (char*));
218 (*stabvector
)->count
= 0;
219 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
221 else if ((*stabvector
)->count
>= (*stabvector
)->length
) {
222 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
223 *stabvector
= (struct pending_stabs
*)
224 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
225 (*stabvector
)->length
* sizeof (char*));
227 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
230 /* Linenos are processed on a file-by-file basis.
234 1) xlc (IBM's native c compiler) postpones static function code
235 emission to the end of a compilation unit. This way it can
236 determine if those functions (statics) are needed or not, and
237 can do some garbage collection (I think). This makes line
238 numbers and corresponding addresses unordered, and we end up
239 with a line table like:
256 and that breaks gdb's binary search on line numbers, if the
257 above table is not sorted on line numbers. And that sort
258 should be on function based, since gcc can emit line numbers
261 10 0x100 - for the init/test part of a for stmt.
264 10 0x400 - for the increment part of a for stmt.
266 arrange_linetable() will do this sorting.
268 2) aix symbol table might look like:
270 c_file // beginning of a new file
271 .bi // beginning of include file
272 .ei // end of include file
276 basically, .bi/.ei pairs do not necessarily encapsulate
277 their scope. They need to be recorded, and processed later
278 on when we come the end of the compilation unit.
279 Include table (inclTable) and process_linenos() handle
282 /* compare line table entry addresses. */
285 compare_lte (lte1
, lte2
)
286 struct linetable_entry
*lte1
, *lte2
;
288 return lte1
->pc
- lte2
->pc
;
291 /* Give a line table with function entries are marked, arrange its functions
292 in assending order and strip off function entry markers and return it in
293 a newly created table. If the old one is good enough, return the old one. */
294 /* FIXME: I think all this stuff can be replaced by just passing
295 sort_linevec = 1 to end_symtab. */
297 static struct linetable
*
298 arrange_linetable (oldLineTb
)
299 struct linetable
*oldLineTb
; /* old linetable */
302 newline
, /* new line count */
303 function_count
; /* # of functions */
305 struct linetable_entry
*fentry
; /* function entry vector */
306 int fentry_size
; /* # of function entries */
307 struct linetable
*newLineTb
; /* new line table */
309 #define NUM_OF_FUNCTIONS 20
311 fentry_size
= NUM_OF_FUNCTIONS
;
312 fentry
= (struct linetable_entry
*)
313 xmalloc (fentry_size
* sizeof (struct linetable_entry
));
315 for (function_count
=0, ii
=0; ii
<oldLineTb
->nitems
; ++ii
) {
317 if (oldLineTb
->item
[ii
].line
== 0) { /* function entry found. */
319 if (function_count
>= fentry_size
) { /* make sure you have room. */
321 fentry
= (struct linetable_entry
*)
322 xrealloc (fentry
, fentry_size
* sizeof (struct linetable_entry
));
324 fentry
[function_count
].line
= ii
;
325 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
330 if (function_count
== 0) {
334 else if (function_count
> 1)
335 qsort (fentry
, function_count
, sizeof(struct linetable_entry
), compare_lte
);
337 /* allocate a new line table. */
338 newLineTb
= (struct linetable
*)
340 (sizeof (struct linetable
) +
341 (oldLineTb
->nitems
- function_count
) * sizeof (struct linetable_entry
));
343 /* if line table does not start with a function beginning, copy up until
347 if (oldLineTb
->item
[0].line
!= 0)
349 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
350 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
352 /* Now copy function lines one by one. */
354 for (ii
=0; ii
< function_count
; ++ii
) {
355 for (jj
= fentry
[ii
].line
+ 1;
356 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
358 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
361 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
;
367 /* We try to detect the beginning of a compilation unit. That info will
368 be used as an entry in line number recording routines (enter_line_range) */
370 static unsigned first_fun_line_offset
;
371 static unsigned first_fun_bf
;
373 #define mark_first_line(OFFSET, SYMNUM) \
374 if (!first_fun_line_offset) { \
375 first_fun_line_offset = OFFSET; \
376 first_fun_bf = SYMNUM; \
380 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
381 following `IncludeChain'. At the end of each symtab (end_symtab),
382 we will determine if we should create additional symtab's to
383 represent if (the include files. */
386 typedef struct _inclTable
{
387 char *name
; /* include filename */
389 /* Offsets to the line table. end points to the last entry which is
390 part of this include file. */
393 struct subfile
*subfile
;
394 unsigned funStartLine
; /* start line # of its function */
397 #define INITIAL_INCLUDE_TABLE_LENGTH 20
398 static InclTable
*inclTable
; /* global include table */
399 static int inclIndx
; /* last entry to table */
400 static int inclLength
; /* table length */
401 static int inclDepth
; /* nested include depth */
405 record_include_begin (cs
)
406 struct coff_symbol
*cs
;
410 /* In xcoff, we assume include files cannot be nested (not in .c files
411 of course, but in corresponding .s files.). */
413 /* This can happen with old versions of GCC.
414 GCC 2.3.3-930426 does not exhibit this on a test case which
415 a user said produced the message for him. */
416 static struct complaint msg
= {"Nested C_BINCL symbols", 0, 0};
421 /* allocate an include file, or make room for the new entry */
422 if (inclLength
== 0) {
423 inclTable
= (InclTable
*)
424 xmalloc (sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
425 memset (inclTable
, '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
426 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
429 else if (inclIndx
>= inclLength
) {
430 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
431 inclTable
= (InclTable
*)
432 xrealloc (inclTable
, sizeof (InclTable
) * inclLength
);
433 memset (inclTable
+inclLength
-INITIAL_INCLUDE_TABLE_LENGTH
,
434 '\0', sizeof (InclTable
)*INITIAL_INCLUDE_TABLE_LENGTH
);
437 inclTable
[inclIndx
].name
= cs
->c_name
;
438 inclTable
[inclIndx
].begin
= cs
->c_value
;
443 record_include_end (cs
)
444 struct coff_symbol
*cs
;
450 static struct complaint msg
= {"Mismatched C_BINCL/C_EINCL pair", 0, 0};
454 pTbl
= &inclTable
[inclIndx
];
455 pTbl
->end
= cs
->c_value
;
462 /* given the start and end addresses of a compilation unit (or a csect, at times)
463 process its lines and create appropriate line vectors. */
466 process_linenos (start
, end
)
467 CORE_ADDR start
, end
;
472 struct subfile main_subfile
; /* subfile structure for the main
475 /* in the main source file, any time we see a function entry, we reset
476 this variable to function's absolute starting line number. All the
477 following line numbers in the function are relative to this, and
478 we record absolute line numbers in record_line(). */
480 int main_source_baseline
= 0;
486 if (!(offset
= first_fun_line_offset
))
487 goto return_after_cleanup
;
489 memset (&main_subfile
, '\0', sizeof (main_subfile
));
490 first_fun_line_offset
= 0;
493 /* All source lines were in the main source file. None in include files. */
495 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
496 &main_source_baseline
);
498 /* else, there was source with line numbers in include files */
501 main_source_baseline
= 0;
502 for (ii
=0; ii
< inclIndx
; ++ii
) {
504 struct subfile
*tmpSubfile
;
506 /* if there is main file source before include file, enter it. */
507 if (offset
< inclTable
[ii
].begin
) {
509 (&main_subfile
, offset
, inclTable
[ii
].begin
- LINESZ
, start
, 0,
510 &main_source_baseline
);
513 /* Have a new subfile for the include file */
515 tmpSubfile
= inclTable
[ii
].subfile
= (struct subfile
*)
516 xmalloc (sizeof (struct subfile
));
518 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
519 firstLine
= &(inclTable
[ii
].funStartLine
);
521 /* enter include file's lines now. */
522 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
523 inclTable
[ii
].end
, start
, 0, firstLine
);
525 offset
= inclTable
[ii
].end
+ LINESZ
;
528 /* all the include files' line have been processed at this point. Now,
529 enter remaining lines of the main file, if any left. */
530 if (offset
< (linetab_offset
+ linetab_size
+ 1 - LINESZ
)) {
531 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
532 &main_source_baseline
);
536 /* Process main file's line numbers. */
537 if (main_subfile
.line_vector
) {
538 struct linetable
*lineTb
, *lv
;
540 lv
= main_subfile
.line_vector
;
542 /* Line numbers are not necessarily ordered. xlc compilation will
543 put static function to the end. */
545 lineTb
= arrange_linetable (lv
);
547 current_subfile
->line_vector
= (struct linetable
*)
548 xrealloc (lv
, (sizeof (struct linetable
)
549 + lv
->nitems
* sizeof (struct linetable_entry
)));
554 current_subfile
->line_vector
= lineTb
;
557 current_subfile
->line_vector_length
=
558 current_subfile
->line_vector
->nitems
;
561 /* Now, process included files' line numbers. */
563 for (ii
=0; ii
< inclIndx
; ++ii
) {
565 if ( (inclTable
[ii
].subfile
)->line_vector
) { /* Useless if!!! FIXMEmgo */
566 struct linetable
*lineTb
, *lv
;
568 lv
= (inclTable
[ii
].subfile
)->line_vector
;
570 /* Line numbers are not necessarily ordered. xlc compilation will
571 put static function to the end. */
573 lineTb
= arrange_linetable (lv
);
577 /* For the same include file, we might want to have more than one subfile.
578 This happens if we have something like:
586 while foo.h including code in it. (stupid but possible)
587 Since start_subfile() looks at the name and uses an existing one if finds,
588 we need to provide a fake name and fool it. */
590 /* start_subfile (inclTable[ii].name, (char*)0); */
591 start_subfile (" ?", (char*)0);
592 free (current_subfile
->name
);
593 current_subfile
->name
= strdup (inclTable
[ii
].name
);
596 current_subfile
->line_vector
= (struct linetable
*)
597 xrealloc (lv
, (sizeof (struct linetable
)
598 + lv
->nitems
* sizeof (struct linetable_entry
)));
603 current_subfile
->line_vector
= lineTb
;
606 current_subfile
->line_vector_length
=
607 current_subfile
->line_vector
->nitems
;
608 start_subfile (pop_subfile (), (char*)0);
612 return_after_cleanup
:
614 /* We don't want to keep alloc/free'ing the global include file table. */
617 /* start with a fresh subfile structure for the next file. */
618 memset (&main_subfile
, '\0', sizeof (struct subfile
));
622 aix_process_linenos ()
624 /* process line numbers and enter them into line vector */
625 process_linenos (last_source_start_addr
, cur_src_end_addr
);
629 /* Enter a given range of lines into the line vector.
630 can be called in the following two ways:
631 enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
632 enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine)
634 endoffset points to the last line table entry that we should pay
638 enter_line_range (subfile
, beginoffset
, endoffset
, startaddr
, endaddr
, firstLine
)
639 struct subfile
*subfile
;
640 unsigned beginoffset
, endoffset
; /* offsets to line table */
641 CORE_ADDR startaddr
, endaddr
;
647 /* Do Byte swapping, if needed. FIXME! */
648 #define P_LINENO(PP) (*(unsigned short*)((struct external_lineno*)(PP))->l_lnno)
649 #define P_LINEADDR(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_paddr)
650 #define P_LINESYM(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_symndx)
652 pp
= &linetab
[beginoffset
- linetab_offset
];
653 if (endoffset
!= 0 && endoffset
- linetab_offset
>= linetab_size
)
655 static struct complaint msg
=
656 {"Bad line table offset in C_EINCL directive", 0, 0};
660 limit
= endoffset
? &linetab
[endoffset
- linetab_offset
]
661 : &linetab
[linetab_size
-1];
663 while (pp
<= limit
) {
665 /* find the address this line represents */
666 addr
= P_LINENO(pp
) ?
667 P_LINEADDR(pp
) : read_symbol_nvalue (P_LINESYM(pp
));
669 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
672 if (P_LINENO(pp
) == 0) {
673 *firstLine
= read_symbol_lineno (P_LINESYM(pp
));
674 record_line (subfile
, 0, addr
);
678 record_line (subfile
, *firstLine
+ P_LINENO(pp
), addr
);
685 int fsize
; /* file size */
686 int fixedparms
; /* number of fixed parms */
687 int floatparms
; /* number of float parms */
688 unsigned int parminfo
; /* parameter info.
689 See /usr/include/sys/debug.h
690 tbtable_ext.parminfo */
691 int framesize
; /* function frame size */
695 /* Given a function symbol, return its traceback information. */
698 retrieve_tracebackinfo (abfd
, textsec
, cs
)
701 struct coff_symbol
*cs
;
703 #define TBTABLE_BUFSIZ 2000
705 static TracebackInfo tbInfo
;
708 static char buffer
[TBTABLE_BUFSIZ
];
711 int bytesread
=0; /* total # of bytes read so far */
712 int bufferbytes
; /* number of bytes in the buffer */
714 int functionstart
= cs
->c_value
- textsec
->vma
;
716 memset (&tbInfo
, '\0', sizeof (tbInfo
));
718 /* keep reading blocks of data from the text section, until finding a zero
719 word and a traceback table. */
721 /* Note: The logical thing way to write this code would be to assign
722 to bufferbytes within the while condition. But that triggers a
723 compiler (xlc in AIX 3.2) bug, so simplify it... */
725 (TBTABLE_BUFSIZ
< (textsec
->_raw_size
- functionstart
- bytesread
) ?
726 TBTABLE_BUFSIZ
: (textsec
->_raw_size
- functionstart
- bytesread
));
728 && (bfd_get_section_contents
729 (abfd
, textsec
, buffer
,
730 (file_ptr
)(functionstart
+ bytesread
), bufferbytes
)))
732 bytesread
+= bufferbytes
;
733 pinsn
= (int*) buffer
;
735 /* if this is the first time we filled the buffer, retrieve function
738 if (bytesread
== bufferbytes
) {
740 /* skip over unrelated instructions */
742 if (*pinsn
== 0x7c0802a6) /* mflr r0 */
744 if ((*pinsn
& 0xfc00003e) == 0x7c000026) /* mfcr Rx */
746 if ((*pinsn
& 0xfc000000) == 0x48000000) /* bl foo, save fprs */
748 if ((*pinsn
& 0xfc1f0000) == 0xbc010000) /* stm Rx, NUM(r1) */
752 int tmp
= (*pinsn
>> 16) & 0xffff;
754 if (tmp
== 0x9421) { /* stu r1, NUM(r1) */
755 tbInfo
.framesize
= 0x10000 - (*pinsn
& 0xffff);
758 else if ((*pinsn
== 0x93e1fffc) || /* st r31,-4(r1) */
759 (tmp
== 0x9001)) /* st r0, NUM(r1) */
761 /* else, could not find a frame size. */
765 } while (++pinsn
&& *pinsn
);
767 if (!tbInfo
.framesize
)
772 /* look for a zero word. */
774 while (*pinsn
&& (pinsn
< (int*)(buffer
+ bufferbytes
- sizeof(int))))
777 if (pinsn
>= (int*)(buffer
+ bufferbytes
))
782 /* function size is the amount of bytes we have skipped so far. */
783 tbInfo
.fsize
= bytesread
- (buffer
+ bufferbytes
- (char*)pinsn
);
787 /* if we don't have the whole traceback table in the buffer, re-read
790 /* This is how much to read to get the traceback table.
791 8 bytes of the traceback table are always present, plus we
793 #define MIN_TBTABSIZ 12
795 if ((char*)pinsn
> (buffer
+ bufferbytes
- MIN_TBTABSIZ
)) {
797 /* In case if we are *very* close to the end of the text section
798 and cannot read properly from that point on, abort by returning
801 This could happen if the traceback table is only 8 bytes,
802 but we try to read 12 bytes of it.
803 Handle this case more graciously -- FIXME */
805 if (!bfd_get_section_contents (
806 abfd
, textsec
, buffer
,
807 (file_ptr
)(functionstart
+
808 bytesread
- (buffer
+ bufferbytes
- (char*)pinsn
)),MIN_TBTABSIZ
))
809 { printf_unfiltered ("Abnormal return!..\n"); return NULL
; }
811 ptb
= (struct tbtable
*)buffer
;
814 ptb
= (struct tbtable
*)pinsn
;
816 tbInfo
.fixedparms
= ptb
->tb
.fixedparms
;
817 tbInfo
.floatparms
= ptb
->tb
.floatparms
;
818 tbInfo
.parminfo
= ptb
->tb_ext
.parminfo
;
822 (TBTABLE_BUFSIZ
< (textsec
->_raw_size
- functionstart
- bytesread
) ?
823 TBTABLE_BUFSIZ
: (textsec
->_raw_size
- functionstart
- bytesread
));
829 /* Given a function symbol, return a pointer to its traceback table. */
832 retrieve_traceback (abfd
, textsec
, cs
, size
)
835 struct coff_symbol
*cs
;
836 int *size
; /* return function size */
838 #define TBTABLE_BUFSIZ 2000
839 #define MIN_TBTABSIZ 50 /* minimum buffer size to hold a
842 static char buffer
[TBTABLE_BUFSIZ
];
845 int bytesread
=0; /* total # of bytes read so far */
846 int bufferbytes
; /* number of bytes in the buffer */
848 int functionstart
= cs
->c_value
- textsec
->filepos
+ textsec
->vma
;
851 /* keep reading blocks of data from the text section, until finding a zero
852 word and a traceback table. */
854 while (bfd_get_section_contents (abfd
, textsec
, buffer
,
855 (file_ptr
)(functionstart
+ bytesread
),
857 (TBTABLE_BUFSIZ
< (textsec
->size
- functionstart
- bytesread
)) ?
858 TBTABLE_BUFSIZ
: (textsec
->size
- functionstart
- bytesread
))))
860 bytesread
+= bufferbytes
;
861 pinsn
= (int*) buffer
;
863 /* look for a zero word. */
865 while (*pinsn
&& (pinsn
< (int*)(buffer
+ bufferbytes
- sizeof(int))))
868 if (pinsn
>= (int*)(buffer
+ bufferbytes
))
873 /* function size is the amount of bytes we have skipped so far. */
874 *size
= bytesread
- (buffer
+ bufferbytes
- pinsn
);
878 /* if we don't have the whole traceback table in the buffer, re-read
881 if ((char*)pinsn
> (buffer
+ bufferbytes
- MIN_TBTABSIZ
)) {
883 /* In case if we are *very* close to the end of the text section
884 and cannot read properly from that point on, abort for now.
885 Handle this case more graciously -- FIXME */
887 if (!bfd_get_section_contents (
888 abfd
, textsec
, buffer
,
889 (file_ptr
)(functionstart
+
890 bytesread
- (buffer
+ bufferbytes
- pinsn
)),MIN_TBTABSIZ
))
891 /* abort (); */ { printf_unfiltered ("abort!!!\n"); return NULL
; }
893 return (struct tbtable
*)buffer
;
896 return (struct tbtable
*)pinsn
;
906 /* Save the vital information for use when closing off the current file.
907 NAME is the file name the symbols came from, START_ADDR is the first
908 text address for the file, and SIZE is the number of bytes of text. */
910 #define complete_symtab(name, start_addr) { \
911 last_source_file = savestring (name, strlen (name)); \
912 last_source_start_addr = start_addr; \
916 /* Refill the symbol table input buffer
917 and set the variables that control fetching entries from it.
918 Reports an error if no data available.
919 This function can read past the end of the symbol table
920 (into the string table) but this does no harm. */
922 /* Reading symbol table has to be fast! Keep the followings as macros, rather
925 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, ALLOCED, SECTION, OBJFILE) \
929 namestr = (NAME) + 1; \
932 obstack_copy0 (&objfile->symbol_obstack, (NAME) + 1, strlen ((NAME)+1)); \
935 prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
936 (char *)NULL, (SECTION), (OBJFILE)); \
937 misc_func_recorded = 1; \
941 /* A parameter template, used by ADD_PARM_TO_PENDING. It is initialized
942 in our initializer function at the bottom of the file, to avoid
943 dependencies on the exact "struct symbol" format. */
945 static struct symbol parmsym
;
947 /* Add a parameter to a given pending symbol list. */
949 #define ADD_PARM_TO_PENDING(PARM, VALUE, PTYPE, PENDING_SYMBOLS) \
951 PARM = (struct symbol *) \
952 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
954 SYMBOL_TYPE (PARM) = PTYPE; \
955 SYMBOL_VALUE (PARM) = VALUE; \
956 add_symbol_to_list (PARM, &PENDING_SYMBOLS); \
960 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
961 nested. At any given time, a symbol can only be in one static block.
962 This is the base address of current static block, zero if non exists. */
964 static int static_block_base
= 0;
966 /* Section number for the current static block. */
968 static int static_block_section
= -1;
970 /* true if space for symbol name has been allocated. */
972 static int symname_alloced
= 0;
974 /* read the whole symbol table of a given bfd. */
977 read_xcoff_symtab (objfile
, nsyms
)
978 struct objfile
*objfile
; /* Object file we're reading from */
979 int nsyms
; /* # of symbols */
981 bfd
*abfd
= objfile
->obfd
;
982 char *raw_symbol
; /* Pointer into raw seething symbol table */
983 char *raw_auxptr
; /* Pointer to first raw aux entry for sym */
984 sec_ptr textsec
; /* Pointer to text section */
985 TracebackInfo
*ptb
; /* Pointer to traceback table */
987 struct internal_syment symbol
[1];
988 union internal_auxent main_aux
;
989 struct coff_symbol cs
[1];
990 CORE_ADDR file_start_addr
= 0;
991 CORE_ADDR file_end_addr
= 0;
993 int next_file_symnum
= -1;
994 int just_started
= 1;
996 int toc_offset
= 0; /* toc offset value in data section. */
1000 long fcn_line_offset
;
1003 struct coff_symbol fcn_stab_saved
;
1005 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1006 union internal_auxent fcn_aux_saved
;
1007 struct type
*fcn_type_saved
= NULL
;
1008 struct context_stack
*new;
1010 char *filestring
= " _start_ "; /* Name of the current file. */
1012 char *last_csect_name
; /* last seen csect's name and value */
1013 CORE_ADDR last_csect_val
;
1015 int misc_func_recorded
; /* true if any misc. function */
1017 current_objfile
= objfile
;
1019 /* Get the appropriate COFF "constants" related to the file we're handling. */
1020 N_TMASK
= coff_data (abfd
)->local_n_tmask
;
1021 N_BTSHFT
= coff_data (abfd
)->local_n_btshft
;
1022 local_symesz
= coff_data (abfd
)->local_symesz
;
1024 last_source_file
= NULL
;
1025 last_csect_name
= 0;
1027 misc_func_recorded
= 0;
1030 start_symtab (filestring
, (char *)NULL
, file_start_addr
);
1032 first_object_file_end
= 0;
1034 /* Allocate space for the entire symbol table at once, and read it
1035 all in. The bfd is already positioned at the beginning of
1036 the symbol table. */
1038 size
= coff_data (abfd
)->local_symesz
* nsyms
;
1039 symtbl
= xmalloc (size
);
1040 symtbl_num_syms
= nsyms
;
1042 val
= bfd_read (symtbl
, size
, 1, abfd
);
1044 perror_with_name ("reading symbol table");
1046 raw_symbol
= symtbl
;
1048 textsec
= bfd_get_section_by_name (abfd
, ".text");
1050 printf_unfiltered ("Unable to locate text section!\n");
1053 while (symnum
< nsyms
) {
1055 QUIT
; /* make this command interruptable. */
1057 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1058 /* read one symbol into `cs' structure. After processing the whole symbol
1059 table, only string table will be kept in memory, symbol table and debug
1060 section of xcoff will be freed. Thus we can mark symbols with names
1061 in string table as `alloced'. */
1065 /* Swap and align the symbol into a reasonable C structure. */
1066 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1068 cs
->c_symnum
= symnum
;
1069 cs
->c_naux
= symbol
->n_numaux
;
1070 if (symbol
->n_zeroes
) {
1071 symname_alloced
= 0;
1072 /* We must use the original, unswapped, name here so the name field
1073 pointed to by cs->c_name will persist throughout xcoffread. If
1074 we use the new field, it gets overwritten for each symbol. */
1075 cs
->c_name
= ((struct external_syment
*)raw_symbol
)->e
.e_name
;
1076 /* If it's exactly E_SYMNMLEN characters long it isn't
1078 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1081 p
= obstack_alloc (&objfile
->symbol_obstack
, E_SYMNMLEN
+ 1);
1082 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1083 p
[E_SYMNMLEN
] = '\0';
1085 symname_alloced
= 1;
1087 } else if (symbol
->n_sclass
& 0x80) {
1088 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1089 symname_alloced
= 0;
1090 } else { /* in string table */
1091 cs
->c_name
= strtbl
+ (int)symbol
->n_offset
;
1092 symname_alloced
= 1;
1094 cs
->c_value
= symbol
->n_value
;
1095 cs
->c_sclass
= symbol
->n_sclass
;
1096 cs
->c_secnum
= symbol
->n_scnum
;
1097 cs
->c_type
= (unsigned)symbol
->n_type
;
1099 raw_symbol
+= coff_data (abfd
)->local_symesz
;
1102 raw_auxptr
= raw_symbol
; /* Save addr of first aux entry */
1104 /* Skip all the auxents associated with this symbol. */
1105 for (ii
= symbol
->n_numaux
; ii
; --ii
) {
1106 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1111 /* if symbol name starts with ".$" or "$", ignore it. */
1112 if (cs
->c_name
[0] == '$' || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1115 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
) {
1116 if (last_source_file
)
1118 end_symtab (cur_src_end_addr
, 1, 0, objfile
, textsec
->target_index
);
1123 start_symtab ("_globals_", (char *)NULL
, (CORE_ADDR
)0);
1124 cur_src_end_addr
= first_object_file_end
;
1125 /* done with all files, everything from here on is globals */
1128 /* if explicitly specified as a function, treat is as one. */
1129 if (ISFCN(cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
) {
1130 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1131 0, cs
->c_naux
, &main_aux
);
1132 goto function_entry_point
;
1135 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
) && cs
->c_naux
== 1)
1137 /* dealing with a symbol with a csect entry. */
1139 # define CSECT(PP) ((PP)->x_csect)
1140 # define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1141 # define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1142 # define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1143 # define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1145 /* Convert the auxent to something we can access. */
1146 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1147 0, cs
->c_naux
, &main_aux
);
1149 switch (CSECT_SMTYP (&main_aux
)) {
1152 continue; /* ignore all external references. */
1154 case XTY_SD
: /* a section description. */
1156 switch (CSECT_SCLAS (&main_aux
)) {
1158 case XMC_PR
: /* a `.text' csect. */
1161 /* A program csect is seen. We have to allocate one
1162 symbol table for each program csect. Normally gdb
1163 prefers one symtab for each source file. In case
1164 of AIX, one source file might include more than one
1165 [PR] csect, and they don't have to be adjacent in
1166 terms of the space they occupy in memory. Thus, one
1167 single source file might get fragmented in the
1168 memory and gdb's file start and end address
1169 approach does not work! GCC (and I think xlc) seem
1170 to put all the code in the unnamed program csect. */
1172 if (last_csect_name
) {
1174 /* if no misc. function recorded in the last seen csect, enter
1175 it as a function. This will take care of functions like
1176 strcmp() compiled by xlc. */
1178 if (!misc_func_recorded
) {
1180 RECORD_MINIMAL_SYMBOL (last_csect_name
, last_csect_val
,
1181 mst_text
, alloced
, last_csect_sec
,
1186 complete_symtab (filestring
, file_start_addr
);
1187 cur_src_end_addr
= file_end_addr
;
1188 end_symtab (file_end_addr
, 1, 0, objfile
,
1189 textsec
->target_index
);
1192 /* Give all csects for this source file the same
1194 start_symtab (filestring
, (char *)NULL
, (CORE_ADDR
)0);
1197 /* If this is the very first csect seen, basically `__start'. */
1199 first_object_file_end
= cs
->c_value
+ CSECT_LEN (&main_aux
);
1203 file_start_addr
= cs
->c_value
;
1204 file_end_addr
= cs
->c_value
+ CSECT_LEN (&main_aux
);
1206 if (cs
->c_name
&& cs
->c_name
[0] == '.') {
1207 last_csect_name
= cs
->c_name
;
1208 last_csect_val
= cs
->c_value
;
1209 last_csect_sec
= cs
->c_secnum
;
1212 misc_func_recorded
= 0;
1218 /* If the section is not a data description, ignore it. Note that
1219 uninitialized data will show up as XTY_CM/XMC_RW pair. */
1223 warning ("More than one xmc_tc0 symbol found.");
1224 toc_offset
= cs
->c_value
;
1227 case XMC_TC
: /* ignore toc entries */
1228 default : /* any other XMC_XXX */
1232 break; /* switch CSECT_SCLAS() */
1236 /* a function entry point. */
1237 if (CSECT_SCLAS (&main_aux
) == XMC_PR
) {
1239 function_entry_point
:
1240 RECORD_MINIMAL_SYMBOL (cs
->c_name
, cs
->c_value
, mst_text
,
1241 symname_alloced
, cs
->c_secnum
, objfile
);
1243 fcn_line_offset
= main_aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
1244 fcn_start_addr
= cs
->c_value
;
1246 /* save the function header info, which will be used
1247 when `.bf' is seen. */
1249 fcn_aux_saved
= main_aux
;
1254 /* If function has two auxent, then debugging information is
1255 already available for it. Process traceback table for
1256 functions with only one auxent. */
1258 if (cs
->c_naux
== 1)
1259 ptb
= retrieve_tracebackinfo (abfd
, textsec
, cs
);
1261 else if (cs
->c_naux
!= 2)
1263 static struct complaint msg
=
1264 {"Expected one or two auxents for function", 0, 0};
1268 /* If there is traceback info, create and add parameters for it. */
1270 if (ptb
&& (ptb
->fixedparms
|| ptb
->floatparms
)) {
1272 int parmcnt
= ptb
->fixedparms
+ ptb
->floatparms
;
1273 char *parmcode
= (char*) &ptb
->parminfo
;
1274 int parmvalue
= ptb
->framesize
+ 0x18; /* sizeof(LINK AREA) == 0x18 */
1275 unsigned int ii
, mask
;
1277 for (ii
=0, mask
= 0x80000000; ii
<parmcnt
; ++ii
) {
1278 struct symbol
*parm
;
1280 if (ptb
->parminfo
& mask
) { /* float or double */
1282 if (ptb
->parminfo
& mask
) { /* double parm */
1284 (parm
, parmvalue
, builtin_type_double
, local_symbols
);
1285 parmvalue
+= sizeof (double);
1287 else { /* float parm */
1289 (parm
, parmvalue
, builtin_type_float
, local_symbols
);
1290 parmvalue
+= sizeof (float);
1293 else { /* fixed parm, use (int*) for hex rep. */
1294 ADD_PARM_TO_PENDING (parm
, parmvalue
,
1295 lookup_pointer_type (builtin_type_int
),
1297 parmvalue
+= sizeof (int);
1302 /* Fake this as a function. Needed in process_xcoff_symbol() */
1305 finish_block(process_xcoff_symbol (cs
, objfile
), &local_symbols
,
1306 pending_blocks
, cs
->c_value
,
1307 cs
->c_value
+ ptb
->fsize
, objfile
);
1311 /* shared library function trampoline code entry point. */
1312 else if (CSECT_SCLAS (&main_aux
) == XMC_GL
) {
1314 /* record trampoline code entries as mst_solib_trampoline symbol.
1315 When we lookup mst symbols, we will choose mst_text over
1316 mst_solib_trampoline. */
1319 /* After the implementation of incremental loading of shared
1320 libraries, we don't want to access trampoline entries. This
1321 approach has a consequence of the necessity to bring the whole
1322 shared library at first, in order do anything with it (putting
1323 breakpoints, using malloc, etc). On the other side, this is
1324 consistient with gdb's behaviour on a SUN platform. */
1326 /* Trying to prefer *real* function entry over its trampoline,
1327 by assigning `mst_solib_trampoline' type to trampoline entries
1328 fails. Gdb treats those entries as chars. FIXME. */
1330 /* Recording this entry is necessary. Single stepping relies on
1331 this vector to get an idea about function address boundaries. */
1333 prim_record_minimal_symbol_and_info
1334 ("<trampoline>", cs
->c_value
, mst_solib_trampoline
,
1335 (char *)NULL
, cs
->c_secnum
, objfile
);
1338 /* record trampoline code entries as mst_solib_trampoline symbol.
1339 When we lookup mst symbols, we will choose mst_text over
1340 mst_solib_trampoline. */
1342 RECORD_MINIMAL_SYMBOL (cs
->c_name
, cs
->c_value
,
1343 mst_solib_trampoline
,
1344 symname_alloced
, objfile
);
1350 default : /* all other XTY_XXXs */
1352 } /* switch CSECT_SMTYP() */ }
1354 switch (cs
->c_sclass
) {
1358 /* see if the last csect needs to be recorded. */
1360 if (last_csect_name
&& !misc_func_recorded
) {
1362 /* if no misc. function recorded in the last seen csect, enter
1363 it as a function. This will take care of functions like
1364 strcmp() compiled by xlc. */
1367 RECORD_MINIMAL_SYMBOL (last_csect_name
, last_csect_val
,
1368 mst_text
, alloced
, last_csect_sec
, objfile
);
1371 /* c_value field contains symnum of next .file entry in table
1372 or symnum of first global after last .file. */
1374 next_file_symnum
= cs
->c_value
;
1376 /* complete symbol table for last object file containing
1377 debugging information. */
1379 /* Whether or not there was a csect in the previous file, we have to call
1380 `end_stabs' and `start_stabs' to reset type_vector,
1381 line_vector, etc. structures. */
1383 complete_symtab (filestring
, file_start_addr
);
1384 cur_src_end_addr
= file_end_addr
;
1385 end_symtab (file_end_addr
, 1, 0, objfile
, textsec
->target_index
);
1388 /* XCOFF, according to the AIX 3.2 documentation, puts the filename
1389 in cs->c_name. But xlc 1.3.0.2 has decided to do things the
1390 standard COFF way and put it in the auxent. We use the auxent if
1391 there is one, otherwise use the name. Simple enough. */
1393 filestring
= coff_getfilename (&main_aux
);
1395 filestring
= cs
->c_name
;
1398 start_symtab (filestring
, (char *)NULL
, (CORE_ADDR
)0);
1399 last_csect_name
= 0;
1401 /* reset file start and end addresses. A compilation unit with no text
1402 (only data) should have zero file boundaries. */
1403 file_start_addr
= file_end_addr
= 0;
1408 fcn_stab_saved
= *cs
;
1413 if (STREQ (cs
->c_name
, ".bf")) {
1415 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1416 0, cs
->c_naux
, &main_aux
);
1418 within_function
= 1;
1420 mark_first_line (fcn_line_offset
, cs
->c_symnum
);
1422 new = push_context (0, fcn_start_addr
);
1424 new->name
= define_symbol
1425 (fcn_cs_saved
.c_value
, fcn_stab_saved
.c_name
, 0, 0, objfile
);
1426 if (new->name
!= NULL
)
1427 SYMBOL_SECTION (new->name
) = cs
->c_secnum
;
1429 else if (STREQ (cs
->c_name
, ".ef")) {
1431 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1432 0, cs
->c_naux
, &main_aux
);
1434 /* the value of .ef is the address of epilogue code;
1435 not useful for gdb */
1436 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1437 contains number of lines to '}' */
1439 fcn_last_line
= main_aux
.x_sym
.x_misc
.x_lnsz
.x_lnno
;
1440 new = pop_context ();
1441 if (context_stack_depth
!= 0)
1442 error ("invalid symbol data; .bf/.ef/.bb/.eb symbol mismatch, at symbol %d.",
1445 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1447 fcn_cs_saved
.c_value
+
1448 fcn_aux_saved
.x_sym
.x_misc
.x_fsize
, objfile
);
1449 within_function
= 0;
1453 case C_BSTAT
: /* begin static block */
1455 struct internal_syment symbol
;
1457 read_symbol (&symbol
, cs
->c_value
);
1458 static_block_base
= symbol
.n_value
;
1459 static_block_section
= symbol
.n_scnum
;
1463 case C_ESTAT
: /* end of static block */
1464 static_block_base
= 0;
1465 static_block_section
= -1;
1468 case C_ARG
: /* These are not implemented. */
1474 printf_unfiltered ("ERROR: Unimplemented storage class: %d.\n", cs
->c_sclass
);
1477 case C_HIDEXT
: /* ignore these.. */
1482 case C_BINCL
: /* beginning of include file */
1484 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1485 order. Thus, when wee see them, we might not know enough info
1486 to process them. Thus, we'll be saving them into a table
1487 (inclTable) and postpone their processing. */
1489 record_include_begin (cs
);
1492 case C_EINCL
: /* end of include file */
1493 /* see the comment after case C_BINCL. */
1494 record_include_end (cs
);
1498 if (STREQ (cs
->c_name
, ".bb")) {
1500 new = push_context (depth
, cs
->c_value
);
1502 else if (STREQ (cs
->c_name
, ".eb")) {
1503 new = pop_context ();
1504 if (depth
!= new->depth
)
1505 error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.",
1509 if (local_symbols
&& context_stack_depth
> 0) {
1510 /* Make a block for the local symbols within. */
1511 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1512 new->start_addr
, cs
->c_value
, objfile
);
1514 local_symbols
= new->locals
;
1519 process_xcoff_symbol (cs
, objfile
);
1525 if (last_source_file
)
1527 end_symtab (cur_src_end_addr
, 1, 0, objfile
, textsec
->target_index
);
1532 current_objfile
= NULL
;
1534 /* Record the toc offset value of this symbol table into ldinfo structure.
1535 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
1536 this information would be file auxiliary header. */
1538 #ifndef FAKING_RS6000
1539 xcoff_add_toc_to_loadinfo (toc_offset
);
1543 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1544 (SYMBOL2) = (struct symbol *) \
1545 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
1546 *(SYMBOL2) = *(SYMBOL1);
1549 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1550 (ALLOCED) ? (NAME) : obstack_copy0 (&objfile->symbol_obstack, (NAME), strlen (NAME));
1553 /* process one xcoff symbol. */
1555 static struct symbol
*
1556 process_xcoff_symbol (cs
, objfile
)
1557 register struct coff_symbol
*cs
;
1558 struct objfile
*objfile
;
1560 struct symbol onesymbol
;
1561 register struct symbol
*sym
= &onesymbol
;
1562 struct symbol
*sym2
= NULL
;
1564 char *name
, *pp
, *qq
;
1565 int struct_and_type_combined
;
1572 memset (sym
, '\0', sizeof (struct symbol
));
1574 /* default assumptions */
1575 SYMBOL_VALUE (sym
) = cs
->c_value
;
1576 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1577 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1579 if (ISFCN (cs
->c_type
)) {
1581 /* At this point, we don't know the type of the function and assume it
1582 is int. This will be patched with the type from its stab entry later
1583 on in patch_block_stabs () */
1585 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1586 SYMBOL_TYPE (sym
) = lookup_function_type (lookup_fundamental_type (objfile
, FT_INTEGER
));
1588 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1589 SYMBOL_DUP (sym
, sym2
);
1591 if (cs
->c_sclass
== C_EXT
)
1592 add_symbol_to_list (sym2
, &global_symbols
);
1593 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1594 add_symbol_to_list (sym2
, &file_symbols
);
1599 /* in case we can't figure out the type, default is `int'. */
1600 SYMBOL_TYPE (sym
) = lookup_fundamental_type (objfile
, FT_INTEGER
);
1602 switch (cs
->c_sclass
)
1606 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1607 add_stab_to_list (name
, &global_stabs
);
1609 add_stab_to_list (name
, &file_stabs
);
1614 add_stab_to_list (name
, &global_stabs
);
1618 common_block_start (cs
->c_name
, objfile
);
1622 common_block_end (objfile
);
1626 complain (&storclass_complaint
, cs
->c_sclass
);
1634 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1637 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1643 /* For xlc (not GCC), the 'V' symbol descriptor is used for all
1644 statics and we need to distinguish file-scope versus function-scope
1645 using within_function. We do this by changing the string we pass
1646 to define_symbol to use 'S' where we need to, which is not necessarily
1647 super-clean, but seems workable enough. */
1649 if (*name
== ':' || (pp
= (char *) strchr(name
, ':')) == NULL
)
1653 if (*pp
== 'V' && !within_function
)
1655 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1658 SYMBOL_VALUE (sym
) += static_block_base
;
1659 SYMBOL_SECTION (sym
) = static_block_section
;
1664 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, N_LSYM
, objfile
);
1667 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1672 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1673 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1674 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1675 SYMBOL_DUP (sym
, sym2
);
1676 add_symbol_to_list (sym2
, &local_symbols
);
1680 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1681 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1682 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1683 SYMBOL_DUP (sym
, sym2
);
1684 add_symbol_to_list (sym2
, &global_symbols
);
1688 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1689 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1690 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1691 SYMBOL_DUP (sym
, sym2
);
1693 (sym2
, within_function
? &local_symbols
: &file_symbols
);
1697 printf_unfiltered ("ERROR! C_REG is not fully implemented!\n");
1698 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1699 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1700 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1701 SYMBOL_DUP (sym
, sym2
);
1702 add_symbol_to_list (sym2
, &local_symbols
);
1706 pp
= (char*) strchr (name
, ':');
1708 sym
= define_symbol (cs
->c_value
, cs
->c_name
, 0, 0, objfile
);
1710 SYMBOL_SECTION (sym
) = cs
->c_secnum
;
1714 complain (&rsym_complaint
, name
);
1722 /* Set *SYMBOL to symbol number symno in symtbl. */
1724 read_symbol (symbol
, symno
)
1725 struct internal_syment
*symbol
;
1728 if (symno
< 0 || symno
>= symtbl_num_syms
)
1730 static struct complaint msg
=
1731 {"Invalid symbol offset", 0, 0};
1733 symbol
->n_value
= 0;
1734 symbol
->n_scnum
= -1;
1737 bfd_coff_swap_sym_in (symfile_bfd
, symtbl
+ (symno
*local_symesz
), symbol
);
1740 /* Get value corresponding to symbol number symno in symtbl. */
1743 read_symbol_nvalue (symno
)
1746 struct internal_syment symbol
[1];
1748 read_symbol (symbol
, symno
);
1749 return symbol
->n_value
;
1753 /* Find the address of the function corresponding to symno, where
1754 symno is the symbol pointed to by the linetable. */
1757 read_symbol_lineno (symno
)
1760 struct internal_syment symbol
[1];
1761 union internal_auxent main_aux
[1];
1763 /* Note that just searching for a short distance (e.g. 50 symbols)
1764 is not enough, at least in the following case.
1767 [many .stabx entries]
1768 [a few functions, referring to foo]
1772 What happens here is that the assembler moves the .stabx entries
1773 to right before the ".bf" for foo, but the symbol for "foo" is before
1774 all the stabx entries. See PR gdb/2222. */
1775 while (symno
< symtbl_num_syms
) {
1776 bfd_coff_swap_sym_in (symfile_bfd
,
1777 symtbl
+ (symno
*local_symesz
), symbol
);
1778 if (symbol
->n_sclass
== C_FCN
&& STREQ (symbol
->n_name
, ".bf"))
1780 symno
+= symbol
->n_numaux
+1;
1783 complain (&bf_notfound_complaint
);
1787 /* take aux entry and return its lineno */
1789 bfd_coff_swap_aux_in (symfile_bfd
, symtbl
+(symno
*local_symesz
),
1790 symbol
->n_type
, symbol
->n_sclass
,
1791 0, symbol
->n_numaux
, 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_offsets
*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. */