aboutsummaryrefslogtreecommitdiff
path: root/bfd/rs6000-core.c
blob: 9fed1ff48b3d9edeb1a60a12b3bd983f5427e0d3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
/* IBM RS/6000 "XCOFF" back-end for BFD.
   Copyright (C) 1990-2021 Free Software Foundation, Inc.
   Written by Metin G. Ozisik, Mimi Phuong-Thao Vo, and John Gilmore.
   Archive support from Damon A. Permezel.
   Contributed by IBM Corporation and Cygnus Support.

   This file is part of BFD, the Binary File Descriptor library.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */


/* This port currently only handles reading object files, except when
   compiled on an RS/6000 host.  -- no archive support, no core files.
   In all cases, it does not support writing.

   This is in a separate file from coff-rs6000.c, because it includes
   system include files that conflict with coff/rs6000.h.  */

/* Internalcoff.h and coffcode.h modify themselves based on this flag.  */
#define RS6000COFF_C 1

/* The AIX 4.1 kernel is obviously compiled with -D_LONG_LONG, so
   we have to define _LONG_LONG for older versions of gcc to get the
   proper alignments in the user structure.  */
#if defined(_AIX41) && !defined(_LONG_LONG)
#define _LONG_LONG
#endif

#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"

#ifdef AIX_CORE

/* AOUTHDR is defined by the above.  We need another defn of it, from the
   system include files.  Punt the old one and get us a new name for the
   typedef in the system include files.  */
#ifdef AOUTHDR
#undef AOUTHDR
#endif
#define	AOUTHDR	second_AOUTHDR

#undef	SCNHDR

/* Support for core file stuff.  */

#include <sys/user.h>
#define __LDINFO_PTRACE32__	/* for __ld_info32 */
#define __LDINFO_PTRACE64__	/* for __ld_info64 */
#include <sys/ldr.h>
#include <sys/core.h>
#include <sys/systemcfg.h>

/* Borrowed from <sys/inttypes.h> on recent AIX versions.  */
typedef unsigned long ptr_to_uint;

#define	core_hdr(bfd)		((CoreHdr *) bfd->tdata.any)

/* AIX 4.1 changed the names and locations of a few items in the core file.
   AIX 4.3 defined an entirely new structure, core_dumpx, but kept support for
   the previous 4.1 structure, core_dump.

   AIX_CORE_DUMPX_CORE is defined (by configure) on AIX 4.3+, and
   CORE_VERSION_1 is defined (by AIX core.h) as 2 on AIX 4.3+ and as 1 on AIX
   4.1 and 4.2.  AIX pre-4.1 (aka 3.x) either doesn't define CORE_VERSION_1
   or else defines it as 0.  */

#if defined(CORE_VERSION_1) && !CORE_VERSION_1
# undef CORE_VERSION_1
#endif

/* The following union and macros allow this module to compile on all AIX
   versions and to handle both core_dumpx and core_dump on 4.3+.  CNEW_*()
   and COLD_*() macros respectively retrieve core_dumpx and core_dump
   values.  */

/* Union of 32-bit and 64-bit versions of ld_info.  */

typedef union
{
#if defined (__ld_info32) || defined (__ld_info64)
  struct __ld_info32 l32;
  struct __ld_info64 l64;
#else
  struct ld_info l32;
  struct ld_info l64;
#endif
} LdInfo;

/* Union of old and new core dump structures.  */

typedef union
{
#ifdef AIX_CORE_DUMPX_CORE
  struct core_dumpx new_dump;	/* New AIX 4.3+ core dump.  */
#else
  struct core_dump new_dump;	/* For simpler coding.  */
#endif
#ifndef BFD64			/* Use old only if gdb is 32-bit.  */
  struct core_dump old;		/* Old AIX 4.2- core dump, still used on
				   4.3+ with appropriate SMIT config.  */
#endif
} CoreHdr;

/* Union of old and new vm_info structures.  */

#ifdef CORE_VERSION_1
typedef union
{
#ifdef AIX_CORE_DUMPX_CORE
  struct vm_infox new_dump;
#else
  struct vm_info new_dump;
#endif
#ifndef BFD64
  struct vm_info old;
#endif
} VmInfo;
#endif

/* Return whether CoreHdr C is in new or old format.  */

#ifdef AIX_CORE_DUMPX_CORE
# ifndef BFD64
#  define CORE_NEW(c)	(!(c).old.c_entries)
# else
#  define CORE_NEW(c)	1
# endif
#else
# define CORE_NEW(c)	0
#endif

/* Return whether CoreHdr C usese core_dumpxx structure.

   FIXME: the core file format version number used here definitely indicates
   that struct core_dumpxx should be used to represent the core file header,
   but that may not be the only such format version number.  */

#ifdef AIX_5_CORE
# define CORE_DUMPXX_VERSION	267312562
# define CNEW_IS_CORE_DUMPXX(c) ((c).new_dump.c_version == CORE_DUMPXX_VERSION)
#else
# define CNEW_IS_CORE_DUMPXX(c) 0
#endif

/* Return the c_stackorg field from struct core_dumpx C.  */

#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_STACKORG(c)	(c).c_stackorg
#else
# define CNEW_STACKORG(c)	0
#endif

/* Return the offset to the loader region from struct core_dump C.  */

#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_LOADER(c)	(c).c_loader
#else
# define CNEW_LOADER(c)	0
#endif

/* Return the offset to the loader region from struct core_dump C.  */

#define COLD_LOADER(c)	(c).c_tab

/* Return the c_lsize field from struct core_dumpx C.  */

#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_LSIZE(c)	(c).c_lsize
#else
# define CNEW_LSIZE(c)	0
#endif

/* Return the c_dataorg field from struct core_dumpx C.  */

#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_DATAORG(c)	(c).c_dataorg
#else
# define CNEW_DATAORG(c)	0
#endif

/* Return the c_datasize field from struct core_dumpx C.  */

#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_DATASIZE(c)	(c).c_datasize
#else
# define CNEW_DATASIZE(c)	0
#endif

/* Return the c_impl field from struct core_dumpx C.  */

#if defined (HAVE_ST_C_IMPL) || defined (AIX_5_CORE)
# define CNEW_IMPL(c)	(c).c_impl
#else
# define CNEW_IMPL(c)	0
#endif

/* Return the command string from struct core_dumpx C.  */

#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_COMM(c)	(c).c_u.U_proc.pi_comm
#else
# define CNEW_COMM(c)	0
#endif

/* Return the command string from struct core_dump C.  */

#ifdef CORE_VERSION_1
# define COLD_COMM(c)	(c).c_u.U_comm
#else
# define COLD_COMM(c)	(c).c_u.u_comm
#endif

/* Return the struct __context64 pointer from struct core_dumpx C.  */

#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_CONTEXT64(c)	(c).c_flt.hctx.r64
#else
# define CNEW_CONTEXT64(c)	c
#endif

/* Return the struct mstsave pointer from struct core_dumpx C.  */

#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_MSTSAVE(c)	(c).c_flt.hctx.r32
#else
# define CNEW_MSTSAVE(c)	c
#endif

/* Return the struct mstsave pointer from struct core_dump C.  */

#ifdef CORE_VERSION_1
# define COLD_MSTSAVE(c)	(c).c_mst
#else
# define COLD_MSTSAVE(c)	(c).c_u.u_save
#endif

/* Return whether struct core_dumpx is from a 64-bit process.  */

#ifdef AIX_CORE_DUMPX_CORE
# define CNEW_PROC64(c)		IS_PROC64(&(c).c_u.U_proc)
#else
# define CNEW_PROC64(c)		0
#endif

/* Magic end-of-stack addresses for old core dumps.  This is _very_ fragile,
   but I don't see any easy way to get that info right now.  */

#ifdef CORE_VERSION_1
# define COLD_STACKEND	0x2ff23000
#else
# define COLD_STACKEND	0x2ff80000
#endif

/* Size of the leading portion that old and new core dump structures have in
   common.  */
#ifdef AIX_CORE_DUMPX_CORE
#define CORE_COMMONSZ  ((long) &((struct core_dumpx *) 0)->c_entries \
			+ sizeof (((struct core_dumpx *) 0)->c_entries))
#else
#define CORE_COMMONSZ  ((int) &((struct core_dump *) 0)->c_entries \
			+ sizeof (((struct core_dump *) 0)->c_entries))
#endif
/* Define prototypes for certain functions, to avoid a compiler warning
   saying that they are missing.  */

const bfd_cleanup rs6000coff_core_p (bfd *abfd);
bfd_boolean rs6000coff_core_file_matches_executable_p (bfd *core_bfd,
						       bfd *exec_bfd);
char * rs6000coff_core_file_failing_command (bfd *abfd);
int rs6000coff_core_file_failing_signal (bfd *abfd);

/* Try to read into CORE the header from the core file associated with ABFD.
   Return success.  */

static bfd_boolean
read_hdr (bfd *abfd, CoreHdr *core)
{
  bfd_size_type size;

  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
    return FALSE;

  /* Read the leading portion that old and new core dump structures have in
     common.  */
  size = CORE_COMMONSZ;
  if (bfd_bread (core, size, abfd) != size)
    return FALSE;

  /* Read the trailing portion of the structure.  */
  if (CORE_NEW (*core))
    size = sizeof (core->new_dump);
#ifndef BFD64
  else
    size = sizeof (core->old);
#endif
  size -= CORE_COMMONSZ;
  return bfd_bread ((char *) core + CORE_COMMONSZ, size, abfd) == size;
}

static asection *
make_bfd_asection (bfd *abfd, const char *name, flagword flags,
		   bfd_size_type size, bfd_vma vma, file_ptr filepos)
{
  asection *asect;

  asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
  if (!asect)
    return NULL;

  asect->size = size;
  asect->vma = vma;
  asect->filepos = filepos;
  asect->alignment_power = 8;

  return asect;
}

/* Decide if a given bfd represents a `core' file or not. There really is no
   magic number or anything like, in rs6000coff.  */

bfd_cleanup
rs6000coff_core_p (bfd *abfd)
{
  CoreHdr core;
  struct stat statbuf;
  bfd_size_type size;
  char *tmpptr;

  /* Values from new and old core structures.  */
  int c_flag;
  file_ptr c_stack, c_regoff, c_loader;
  bfd_size_type c_size, c_regsize, c_lsize;
  bfd_vma c_stackend;
  void *c_regptr;
  int proc64;

  if (!read_hdr (abfd, &core))
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  /* This isn't the right handler for 64-bit core files on AIX 5.x.  */
  if (CORE_NEW (core) && CNEW_IS_CORE_DUMPXX (core))
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  /* Copy fields from new or old core structure.  */
  if (CORE_NEW (core))
    {
      c_flag = core.new_dump.c_flag;
      c_stack = (file_ptr) core.new_dump.c_stack;
      c_size = core.new_dump.c_size;
      c_stackend = CNEW_STACKORG (core.new_dump) + c_size;
      c_lsize = CNEW_LSIZE (core.new_dump);
      c_loader = CNEW_LOADER (core.new_dump);
#ifndef BFD64
      proc64 = CNEW_PROC64 (core.new_dump);
    }
  else
    {
      c_flag = core.old.c_flag;
      c_stack = (file_ptr) (ptr_to_uint) core.old.c_stack;
      c_size = core.old.c_size;
      c_stackend = COLD_STACKEND;
      c_lsize = 0x7ffffff;
      c_loader = (file_ptr) (ptr_to_uint) COLD_LOADER (core.old);
#endif
      proc64 = 0;
    }

  if (proc64)
    {
      c_regsize = sizeof (CNEW_CONTEXT64 (core.new_dump));
      c_regptr = &CNEW_CONTEXT64 (core.new_dump);
    }
  else if (CORE_NEW (core))
    {
      c_regsize = sizeof (CNEW_MSTSAVE (core.new_dump));
      c_regptr = &CNEW_MSTSAVE (core.new_dump);
    }
#ifndef BFD64
  else
    {
      c_regsize = sizeof (COLD_MSTSAVE (core.old));
      c_regptr = &COLD_MSTSAVE (core.old);
    }
#endif
  c_regoff = (char *) c_regptr - (char *) &core;

  if (bfd_stat (abfd, &statbuf) < 0)
    {
      bfd_set_error (bfd_error_system_call);
      return NULL;
    }

  /* If the core file ulimit is too small, the system will first
     omit the data segment, then omit the stack, then decline to
     dump core altogether (as far as I know UBLOCK_VALID and LE_VALID
     are always set) (this is based on experimentation on AIX 3.2).
     Now, the thing is that GDB users will be surprised
     if segments just silently don't appear (well, maybe they would
     think to check "info files", I don't know).

     For the data segment, we have no choice but to keep going if it's
     not there, since the default behavior is not to dump it (regardless
     of the ulimit, it's based on SA_FULLDUMP).  But for the stack segment,
     if it's not there, we refuse to have anything to do with this core
     file.  The usefulness of a core dump without a stack segment is pretty
     limited anyway.  */

  if (!(c_flag & UBLOCK_VALID)
      || !(c_flag & LE_VALID))
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  if (!(c_flag & USTACK_VALID))
    {
      bfd_set_error (bfd_error_file_truncated);
      return NULL;
    }

  /* Don't check the core file size for a full core, AIX 4.1 includes
     additional shared library sections in a full core.  */
  if (!(c_flag & (FULL_CORE | CORE_TRUNC)))
    {
      /* If the size is wrong, it means we're misinterpreting something.  */
      if (c_stack + (file_ptr) c_size != statbuf.st_size)
	{
	  bfd_set_error (bfd_error_wrong_format);
	  return NULL;
	}
    }

  /* Sanity check on the c_tab field.  */
  if (!CORE_NEW (core)
      && (
#ifndef BFD64
	  c_loader < (file_ptr) sizeof core.old
#else
	  c_loader < (file_ptr) sizeof core.new_dump
#endif
	  || c_loader >= statbuf.st_size
	  || c_loader >= c_stack))
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  /* Issue warning if the core file was truncated during writing.  */
  if (c_flag & CORE_TRUNC)
    _bfd_error_handler (_("%pB: warning core file truncated"), abfd);

  /* Allocate core file header.  */
#ifndef BFD64
  size = CORE_NEW (core) ? sizeof (core.new_dump) : sizeof (core.old);
#else
  size =  sizeof (core.new_dump);
#endif
  tmpptr = (char *) bfd_zalloc (abfd, (bfd_size_type) size);
  if (!tmpptr)
    return NULL;

  /* Copy core file header.  */
  memcpy (tmpptr, &core, size);
  set_tdata (abfd, tmpptr);

  /* Set architecture.  */
  if (CORE_NEW (core))
    {
      enum bfd_architecture arch;
      unsigned long mach;

      switch (CNEW_IMPL (core.new_dump))
	{
	case POWER_RS1:
	case POWER_RSC:
	case POWER_RS2:
	  arch = bfd_arch_rs6000;
	  mach = bfd_mach_rs6k;
	  break;
	default:
	  arch = bfd_arch_powerpc;
	  mach = bfd_mach_ppc;
	  break;
	}
      bfd_default_set_arch_mach (abfd, arch, mach);
    }

  /* .stack section.  */
  if (!make_bfd_asection (abfd, ".stack",
			  SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
			  c_size, c_stackend - c_size, c_stack))
    goto fail;

  /* .reg section for all registers.  */
  if (!make_bfd_asection (abfd, ".reg",
			  SEC_HAS_CONTENTS,
			  c_regsize, (bfd_vma) 0, c_regoff))
    goto fail;

  /* .ldinfo section.
     To actually find out how long this section is in this particular
     core dump would require going down the whole list of struct ld_info's.
     See if we can just fake it.  */
  if (!make_bfd_asection (abfd, ".ldinfo",
			  SEC_HAS_CONTENTS,
			  c_lsize, (bfd_vma) 0, c_loader))
    goto fail;

#ifndef CORE_VERSION_1
  /* .data section if present.
     AIX 3 dumps the complete data section and sets FULL_CORE if the
     ulimit is large enough, otherwise the data section is omitted.
     AIX 4 sets FULL_CORE even if the core file is truncated, we have
     to examine core.c_datasize below to find out the actual size of
     the .data section.  */
  if (c_flag & FULL_CORE)
    {
      if (!make_bfd_asection (abfd, ".data",
			      SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
			      (bfd_size_type) core.old.c_u.u_dsize,
			      (bfd_vma)
				CDATA_ADDR (core.old.c_u.u_dsize),
			      c_stack + c_size))
	goto fail;
    }
#endif

#ifdef CORE_VERSION_1
  /* AIX 4 adds data sections from loaded objects to the core file,
     which can be found by examining ldinfo, and anonymously mmapped
     regions.  */
  {
    LdInfo ldinfo;
    bfd_size_type ldi_datasize;
    file_ptr ldi_core;
    uint ldi_next;
    bfd_vma ldi_dataorg;
    bfd_vma core_dataorg;

    /* Fields from new and old core structures.  */
    bfd_size_type c_datasize, c_vmregions;
    file_ptr c_data, c_vmm;

    if (CORE_NEW (core))
      {
	c_datasize = CNEW_DATASIZE (core.new_dump);
	c_data = (file_ptr) core.new_dump.c_data;
	c_vmregions = core.new_dump.c_vmregions;
	c_vmm = (file_ptr) core.new_dump.c_vmm;
      }
#ifndef BFD64
    else
      {
	c_datasize = core.old.c_datasize;
	c_data = (file_ptr) (ptr_to_uint) core.old.c_data;
	c_vmregions = core.old.c_vmregions;
	c_vmm = (file_ptr) (ptr_to_uint) core.old.c_vmm;
      }
#endif

    /* .data section from executable.  */
    if (c_datasize)
      {
	/* If Large Memory Model is used, then the .data segment should start from
	   BDATAORG which has been defined in the system header files. */

	if (c_flag & CORE_BIGDATA)
	  core_dataorg = BDATAORG;
	else
	  core_dataorg = CDATA_ADDR (c_datasize);

	if (!make_bfd_asection (abfd, ".data",
				SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
				c_datasize,
				(bfd_vma) core_dataorg,
				c_data))
	  goto fail;
      }

    /* .data sections from loaded objects.  */
    if (proc64)
      size = (unsigned long) ((LdInfo *) 0)->l64.ldinfo_filename;
    else
      size = (unsigned long) ((LdInfo *) 0)->l32.ldinfo_filename;

    while (1)
      {
	if (bfd_seek (abfd, c_loader, SEEK_SET) != 0)
	  goto fail;
	if (bfd_bread (&ldinfo, size, abfd) != size)
	  goto fail;

	if (proc64)
	  {
	    ldi_core = ldinfo.l64.ldinfo_core;
	    ldi_datasize = ldinfo.l64.ldinfo_datasize;
	    ldi_dataorg = (bfd_vma) ldinfo.l64.ldinfo_dataorg;
	    ldi_next = ldinfo.l64.ldinfo_next;
	  }
	else
	  {
	    ldi_core = ldinfo.l32.ldinfo_core;
	    ldi_datasize = ldinfo.l32.ldinfo_datasize;
	    ldi_dataorg = (bfd_vma) (ptr_to_uint) ldinfo.l32.ldinfo_dataorg;
	    ldi_next = ldinfo.l32.ldinfo_next;
	  }

	if (ldi_core)
	  if (!make_bfd_asection (abfd, ".data",
				  SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
				  ldi_datasize, ldi_dataorg, ldi_core))
	    goto fail;

	if (ldi_next == 0)
	  break;
	c_loader += ldi_next;
      }

    /* .vmdata sections from anonymously mmapped regions.  */
    if (c_vmregions)
      {
	bfd_size_type i;

	if (bfd_seek (abfd, c_vmm, SEEK_SET) != 0)
	  goto fail;

	for (i = 0; i < c_vmregions; i++)
	  {
	    VmInfo vminfo;
	    bfd_size_type vminfo_size;
	    file_ptr vminfo_offset;
	    bfd_vma vminfo_addr;

#ifndef BFD64
	    size = CORE_NEW (core) ? sizeof (vminfo.new_dump) : sizeof (vminfo.old);
#else
	    size = sizeof (vminfo.new_dump);
#endif
	    if (bfd_bread (&vminfo, size, abfd) != size)
	      goto fail;

	    if (CORE_NEW (core))
	      {
		vminfo_addr = (bfd_vma) vminfo.new_dump.vminfo_addr;
		vminfo_size = vminfo.new_dump.vminfo_size;
		vminfo_offset = vminfo.new_dump.vminfo_offset;
	      }
#ifndef BFD64
	    else
	      {
		vminfo_addr = (bfd_vma) (ptr_to_uint) vminfo.old.vminfo_addr;
		vminfo_size = vminfo.old.vminfo_size;
		vminfo_offset = vminfo.old.vminfo_offset;
	      }
#endif

	    if (vminfo_offset)
	      if (!make_bfd_asection (abfd, ".vmdata",
				      SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
				      vminfo_size, vminfo_addr,
				      vminfo_offset))
		goto fail;
	  }
      }
  }
#endif

  return _bfd_no_cleanup;

 fail:
  bfd_release (abfd, abfd->tdata.any);
  abfd->tdata.any = NULL;
  bfd_section_list_clear (abfd);
  return NULL;
}

/* Return `TRUE' if given core is from the given executable.  */

bfd_boolean
rs6000coff_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)
{
  CoreHdr core;
  bfd_size_type size;
  char *path, *s;
  size_t alloc;
  const char *str1, *str2;
  bfd_boolean ret;
  file_ptr c_loader;

  if (!read_hdr (core_bfd, &core))
    return FALSE;

  if (CORE_NEW (core))
    c_loader = CNEW_LOADER (core.new_dump);
#ifndef BFD64
  else
    c_loader = (file_ptr) (ptr_to_uint) COLD_LOADER (core.old);
#endif

  if (CORE_NEW (core) && CNEW_PROC64 (core.new_dump))
    size = (int) ((LdInfo *) 0)->l64.ldinfo_filename;
  else
    size = (int) ((LdInfo *) 0)->l32.ldinfo_filename;

  if (bfd_seek (core_bfd, c_loader + size, SEEK_SET) != 0)
    return FALSE;

  alloc = 100;
  path = bfd_malloc ((bfd_size_type) alloc);
  if (path == NULL)
    return FALSE;
  s = path;

  while (1)
    {
      if (bfd_bread (s, (bfd_size_type) 1, core_bfd) != 1)
	{
	  free (path);
	  return FALSE;
	}
      if (*s == '\0')
	break;
      ++s;
      if (s == path + alloc)
	{
	  char *n;

	  alloc *= 2;
	  n = bfd_realloc (path, (bfd_size_type) alloc);
	  if (n == NULL)
	    {
	      free (path);
	      return FALSE;
	    }
	  s = n + (path - s);
	  path = n;
	}
    }

  str1 = strrchr (path, '/');
  str2 = strrchr (bfd_get_filename (exec_bfd), '/');

  /* step over character '/' */
  str1 = str1 != NULL ? str1 + 1 : path;
  str2 = str2 != NULL ? str2 + 1 : bfd_get_filename (exec_bfd);

  if (strcmp (str1, str2) == 0)
    ret = TRUE;
  else
    ret = FALSE;

  free (path);

  return ret;
}

char *
rs6000coff_core_file_failing_command (bfd *abfd)
{
  CoreHdr *core = core_hdr (abfd);
#ifndef BFD64
  char *com = CORE_NEW (*core) ?
    CNEW_COMM (core->new_dump) : COLD_COMM (core->old);
#else
  char *com = CNEW_COMM (core->new_dump);
#endif

  if (*com)
    return com;
  else
    return 0;
}

int
rs6000coff_core_file_failing_signal (bfd *abfd)
{
  CoreHdr *core = core_hdr (abfd);
#ifndef BFD64
  return CORE_NEW (*core) ? core->new_dump.c_signo : core->old.c_signo;
#else
  return  core->new_dump.c_signo;
#endif
}

#endif /* AIX_CORE */