1 /* IBM RS/6000 "XCOFF" back-end for BFD.
2 Copyright (C) 1990-2023 Free Software Foundation, Inc.
3 Written by Metin G. Ozisik, Mimi Phuong-Thao Vo, and John Gilmore.
4 Archive support from Damon A. Permezel.
5 Contributed by IBM Corporation and Cygnus Support.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
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 3 of the License, or
12 (at your option) any later version.
13
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.
18
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., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
23
24
25 /* This port currently only handles reading object files, except when
26 compiled on an RS/6000 host. -- no archive support, no core files.
27 In all cases, it does not support writing.
28
29 This is in a separate file from coff-rs6000.c, because it includes
30 system include files that conflict with coff/rs6000.h. */
31
32 /* Internalcoff.h and coffcode.h modify themselves based on this flag. */
33 #define RS6000COFF_C 1
34
35 /* The AIX 4.1 kernel is obviously compiled with -D_LONG_LONG, so
36 we have to define _LONG_LONG for older versions of gcc to get the
37 proper alignments in the user structure. */
38 #if defined(_AIX41) && !defined(_LONG_LONG)
39 #define _LONG_LONG
40 #endif
41
42 #include "sysdep.h"
43 #include "bfd.h"
44 #include "libbfd.h"
45
46 #ifdef AIX_CORE
47
48 /* AOUTHDR is defined by the above. We need another defn of it, from the
49 system include files. Punt the old one and get us a new name for the
50 typedef in the system include files. */
51 #ifdef AOUTHDR
52 #undef AOUTHDR
53 #endif
54 #define AOUTHDR second_AOUTHDR
55
56 #undef SCNHDR
57
58 /* Support for core file stuff. */
59
60 #include <sys/user.h>
61 #define __LDINFO_PTRACE32__ /* for __ld_info32 */
62 #define __LDINFO_PTRACE64__ /* for __ld_info64 */
63 #include <sys/ldr.h>
64 #include <sys/core.h>
65 #include <sys/systemcfg.h>
66
67 /* Borrowed from <sys/inttypes.h> on recent AIX versions. */
68 typedef unsigned long ptr_to_uint;
69
70 #define core_hdr(bfd) ((CoreHdr *) bfd->tdata.any)
71
72 /* AIX 4.1 changed the names and locations of a few items in the core file.
73 AIX 4.3 defined an entirely new structure, core_dumpx, but kept support for
74 the previous 4.1 structure, core_dump.
75
76 AIX_CORE_DUMPX_CORE is defined (by configure) on AIX 4.3+, and
77 CORE_VERSION_1 is defined (by AIX core.h) as 2 on AIX 4.3+ and as 1 on AIX
78 4.1 and 4.2. AIX pre-4.1 (aka 3.x) either doesn't define CORE_VERSION_1
79 or else defines it as 0. */
80
81 #if defined(CORE_VERSION_1) && !CORE_VERSION_1
82 # undef CORE_VERSION_1
83 #endif
84
85 /* The following union and macros allow this module to compile on all AIX
86 versions and to handle both core_dumpx and core_dump on 4.3+. CNEW_*()
87 and COLD_*() macros respectively retrieve core_dumpx and core_dump
88 values. */
89
90 /* Union of 32-bit and 64-bit versions of ld_info. */
91
92 typedef union
93 {
94 #if defined (__ld_info32) || defined (__ld_info64)
95 struct __ld_info32 l32;
96 struct __ld_info64 l64;
97 #else
98 struct ld_info l32;
99 struct ld_info l64;
100 #endif
101 } LdInfo;
102
103 /* Union of old and new core dump structures. */
104
105 typedef union
106 {
107 #ifdef AIX_CORE_DUMPX_CORE
108 struct core_dumpx new_dump; /* New AIX 4.3+ core dump. */
109 #else
110 struct core_dump new_dump; /* For simpler coding. */
111 #endif
112 #ifndef BFD64 /* Use old only if gdb is 32-bit. */
113 struct core_dump old; /* Old AIX 4.2- core dump, still used on
114 4.3+ with appropriate SMIT config. */
115 #endif
116 } CoreHdr;
117
118 /* Union of old and new vm_info structures. */
119
120 #ifdef CORE_VERSION_1
121 typedef union
122 {
123 #ifdef AIX_CORE_DUMPX_CORE
124 struct vm_infox new_dump;
125 #else
126 struct vm_info new_dump;
127 #endif
128 #ifndef BFD64
129 struct vm_info old;
130 #endif
131 } VmInfo;
132 #endif
133
134 /* Return whether CoreHdr C is in new or old format. */
135
136 #ifdef AIX_CORE_DUMPX_CORE
137 # ifndef BFD64
138 # define CORE_NEW(c) (!(c).old.c_entries)
139 # else
140 # define CORE_NEW(c) 1
141 # endif
142 #else
143 # define CORE_NEW(c) 0
144 #endif
145
146 /* Return whether CoreHdr C usese core_dumpxx structure.
147
148 FIXME: the core file format version number used here definitely indicates
149 that struct core_dumpxx should be used to represent the core file header,
150 but that may not be the only such format version number. */
151
152 #ifdef AIX_5_CORE
153 # define CORE_DUMPXX_VERSION 267312562
154 # define CNEW_IS_CORE_DUMPXX(c) ((c).new_dump.c_version == CORE_DUMPXX_VERSION)
155 #else
156 # define CNEW_IS_CORE_DUMPXX(c) 0
157 #endif
158
159 /* Return the c_stackorg field from struct core_dumpx C. */
160
161 #ifdef AIX_CORE_DUMPX_CORE
162 # define CNEW_STACKORG(c) (c).c_stackorg
163 #else
164 # define CNEW_STACKORG(c) 0
165 #endif
166
167 /* Return the offset to the loader region from struct core_dump C. */
168
169 #ifdef AIX_CORE_DUMPX_CORE
170 # define CNEW_LOADER(c) (c).c_loader
171 #else
172 # define CNEW_LOADER(c) 0
173 #endif
174
175 /* Return the offset to the loader region from struct core_dump C. */
176
177 #define COLD_LOADER(c) (c).c_tab
178
179 /* Return the c_lsize field from struct core_dumpx C. */
180
181 #ifdef AIX_CORE_DUMPX_CORE
182 # define CNEW_LSIZE(c) (c).c_lsize
183 #else
184 # define CNEW_LSIZE(c) 0
185 #endif
186
187 /* Return the c_dataorg field from struct core_dumpx C. */
188
189 #ifdef AIX_CORE_DUMPX_CORE
190 # define CNEW_DATAORG(c) (c).c_dataorg
191 #else
192 # define CNEW_DATAORG(c) 0
193 #endif
194
195 /* Return the c_datasize field from struct core_dumpx C. */
196
197 #ifdef AIX_CORE_DUMPX_CORE
198 # define CNEW_DATASIZE(c) (c).c_datasize
199 #else
200 # define CNEW_DATASIZE(c) 0
201 #endif
202
203 /* Return the c_impl field from struct core_dumpx C. */
204
205 #if defined (HAVE_ST_C_IMPL) || defined (AIX_5_CORE)
206 # define CNEW_IMPL(c) (c).c_impl
207 #else
208 # define CNEW_IMPL(c) 0
209 #endif
210
211 /* Return the command string from struct core_dumpx C. */
212
213 #ifdef AIX_CORE_DUMPX_CORE
214 # define CNEW_COMM(c) (c).c_u.U_proc.pi_comm
215 #else
216 # define CNEW_COMM(c) 0
217 #endif
218
219 /* Return the command string from struct core_dump C. */
220
221 #ifdef CORE_VERSION_1
222 # define COLD_COMM(c) (c).c_u.U_comm
223 #else
224 # define COLD_COMM(c) (c).c_u.u_comm
225 #endif
226
227 /* Return the struct __context64 pointer from struct core_dumpx C. */
228
229 #ifdef AIX_CORE_DUMPX_CORE
230 # define CNEW_CONTEXT64(c) (c).c_flt.hctx.r64
231 #else
232 # define CNEW_CONTEXT64(c) c
233 #endif
234
235 /* Return the struct mstsave pointer from struct core_dumpx C. */
236
237 #ifdef AIX_CORE_DUMPX_CORE
238 # define CNEW_MSTSAVE(c) (c).c_flt.hctx.r32
239 #else
240 # define CNEW_MSTSAVE(c) c
241 #endif
242
243 /* Return the struct mstsave pointer from struct core_dump C. */
244
245 #ifdef CORE_VERSION_1
246 # define COLD_MSTSAVE(c) (c).c_mst
247 #else
248 # define COLD_MSTSAVE(c) (c).c_u.u_save
249 #endif
250
251 /* Return whether struct core_dumpx is from a 64-bit process. */
252
253 #ifdef AIX_CORE_DUMPX_CORE
254 # define CNEW_PROC64(c) IS_PROC64(&(c).c_u.U_proc)
255 #else
256 # define CNEW_PROC64(c) 0
257 #endif
258
259 /* Magic end-of-stack addresses for old core dumps. This is _very_ fragile,
260 but I don't see any easy way to get that info right now. */
261
262 #ifdef CORE_VERSION_1
263 # define COLD_STACKEND 0x2ff23000
264 #else
265 # define COLD_STACKEND 0x2ff80000
266 #endif
267
268 /* Size of the leading portion that old and new core dump structures have in
269 common. */
270 #ifdef AIX_CORE_DUMPX_CORE
271 #define CORE_COMMONSZ ((long) &((struct core_dumpx *) 0)->c_entries \
272 + sizeof (((struct core_dumpx *) 0)->c_entries))
273 #else
274 #define CORE_COMMONSZ ((int) &((struct core_dump *) 0)->c_entries \
275 + sizeof (((struct core_dump *) 0)->c_entries))
276 #endif
277 /* Define prototypes for certain functions, to avoid a compiler warning
278 saying that they are missing. */
279
280 bfd_cleanup rs6000coff_core_p (bfd *abfd);
281 bool rs6000coff_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd);
282 char * rs6000coff_core_file_failing_command (bfd *abfd);
283 int rs6000coff_core_file_failing_signal (bfd *abfd);
284
285 /* Try to read into CORE the header from the core file associated with ABFD.
286 Return success. */
287
288 static bool
289 read_hdr (bfd *abfd, CoreHdr *core)
290 {
291 bfd_size_type size;
292
293 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
294 return false;
295
296 /* Read the leading portion that old and new core dump structures have in
297 common. */
298 size = CORE_COMMONSZ;
299 if (bfd_bread (core, size, abfd) != size)
300 return false;
301
302 /* Read the trailing portion of the structure. */
303 if (CORE_NEW (*core))
304 size = sizeof (core->new_dump);
305 #ifndef BFD64
306 else
307 size = sizeof (core->old);
308 #endif
309 size -= CORE_COMMONSZ;
310 return bfd_bread ((char *) core + CORE_COMMONSZ, size, abfd) == size;
311 }
312
313 static asection *
314 make_bfd_asection (bfd *abfd, const char *name, flagword flags,
315 bfd_size_type size, bfd_vma vma, file_ptr filepos)
316 {
317 asection *asect;
318
319 asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
320 if (!asect)
321 return NULL;
322
323 asect->size = size;
324 asect->vma = vma;
325 asect->filepos = filepos;
326 asect->alignment_power = 8;
327
328 return asect;
329 }
330
331 /* Decide if a given bfd represents a `core' file or not. There really is no
332 magic number or anything like, in rs6000coff. */
333
334 bfd_cleanup
335 rs6000coff_core_p (bfd *abfd)
336 {
337 CoreHdr core;
338 struct stat statbuf;
339 bfd_size_type size;
340 char *tmpptr;
341
342 /* Values from new and old core structures. */
343 int c_flag;
344 file_ptr c_stack, c_regoff, c_loader;
345 bfd_size_type c_size, c_regsize, c_lsize, c_extoff;
346 bfd_vma c_stackend;
347 void *c_regptr;
348 int proc64;
349
350 if (!read_hdr (abfd, &core))
351 {
352 if (bfd_get_error () != bfd_error_system_call)
353 bfd_set_error (bfd_error_wrong_format);
354 return NULL;
355 }
356
357 /* This isn't the right handler for 64-bit core files on AIX 5.x. */
358 if (CORE_NEW (core) && CNEW_IS_CORE_DUMPXX (core))
359 {
360 bfd_set_error (bfd_error_wrong_format);
361 return NULL;
362 }
363
364 /* Copy fields from new or old core structure. */
365 if (CORE_NEW (core))
366 {
367 c_flag = core.new_dump.c_flag;
368 c_stack = (file_ptr) core.new_dump.c_stack;
369 c_size = core.new_dump.c_size;
370 c_stackend = CNEW_STACKORG (core.new_dump) + c_size;
371 c_lsize = CNEW_LSIZE (core.new_dump);
372 c_loader = CNEW_LOADER (core.new_dump);
373 c_extoff = core.new_dump.c_extctx;
374 #ifndef BFD64
375 proc64 = CNEW_PROC64 (core.new_dump);
376 }
377 else
378 {
379 c_flag = core.old.c_flag;
380 c_stack = (file_ptr) (ptr_to_uint) core.old.c_stack;
381 c_size = core.old.c_size;
382 c_stackend = COLD_STACKEND;
383 c_lsize = 0x7ffffff;
384 c_loader = (file_ptr) (ptr_to_uint) COLD_LOADER (core.old);
385 #endif
386 proc64 = 0;
387 }
388
389 if (proc64)
390 {
391 c_regsize = sizeof (CNEW_CONTEXT64 (core.new_dump));
392 c_regptr = &CNEW_CONTEXT64 (core.new_dump);
393 }
394 else if (CORE_NEW (core))
395 {
396 c_regsize = sizeof (CNEW_MSTSAVE (core.new_dump));
397 c_regptr = &CNEW_MSTSAVE (core.new_dump);
398 }
399 #ifndef BFD64
400 else
401 {
402 c_regsize = sizeof (COLD_MSTSAVE (core.old));
403 c_regptr = &COLD_MSTSAVE (core.old);
404 }
405 #endif
406 c_regoff = (char *) c_regptr - (char *) &core;
407
408 if (bfd_stat (abfd, &statbuf) < 0)
409 {
410 bfd_set_error (bfd_error_system_call);
411 return NULL;
412 }
413
414 /* If the core file ulimit is too small, the system will first
415 omit the data segment, then omit the stack, then decline to
416 dump core altogether (as far as I know UBLOCK_VALID and LE_VALID
417 are always set) (this is based on experimentation on AIX 3.2).
418 Now, the thing is that GDB users will be surprised
419 if segments just silently don't appear (well, maybe they would
420 think to check "info files", I don't know).
421
422 For the data segment, we have no choice but to keep going if it's
423 not there, since the default behavior is not to dump it (regardless
424 of the ulimit, it's based on SA_FULLDUMP). But for the stack segment,
425 if it's not there, we refuse to have anything to do with this core
426 file. The usefulness of a core dump without a stack segment is pretty
427 limited anyway. */
428
429 if (!(c_flag & UBLOCK_VALID)
430 || !(c_flag & LE_VALID))
431 {
432 bfd_set_error (bfd_error_wrong_format);
433 return NULL;
434 }
435
436 if (!(c_flag & USTACK_VALID))
437 {
438 bfd_set_error (bfd_error_file_truncated);
439 return NULL;
440 }
441
442 /* Don't check the core file size for a full core, AIX 4.1 includes
443 additional shared library sections in a full core. */
444 if (!(c_flag & (FULL_CORE | CORE_TRUNC)))
445 {
446 /* If the size is wrong, it means we're misinterpreting something. */
447 if (c_stack + (file_ptr) c_size != statbuf.st_size)
448 {
449 bfd_set_error (bfd_error_wrong_format);
450 return NULL;
451 }
452 }
453
454 /* Sanity check on the c_tab field. */
455 if (!CORE_NEW (core)
456 && (
457 #ifndef BFD64
458 c_loader < (file_ptr) sizeof core.old
459 #else
460 c_loader < (file_ptr) sizeof core.new_dump
461 #endif
462 || c_loader >= statbuf.st_size
463 || c_loader >= c_stack))
464 {
465 bfd_set_error (bfd_error_wrong_format);
466 return NULL;
467 }
468
469 /* Issue warning if the core file was truncated during writing. */
470 if (c_flag & CORE_TRUNC)
471 _bfd_error_handler (_("%pB: warning core file truncated"), abfd);
472
473 /* Allocate core file header. */
474 #ifndef BFD64
475 size = CORE_NEW (core) ? sizeof (core.new_dump) : sizeof (core.old);
476 #else
477 size = sizeof (core.new_dump);
478 #endif
479 tmpptr = (char *) bfd_zalloc (abfd, (bfd_size_type) size);
480 if (!tmpptr)
481 return NULL;
482
483 /* Copy core file header. */
484 memcpy (tmpptr, &core, size);
485 set_tdata (abfd, tmpptr);
486
487 /* Set architecture. */
488 if (CORE_NEW (core))
489 {
490 enum bfd_architecture arch;
491 unsigned long mach;
492
493 switch (CNEW_IMPL (core.new_dump))
494 {
495 case POWER_RS1:
496 case POWER_RSC:
497 case POWER_RS2:
498 arch = bfd_arch_rs6000;
499 mach = bfd_mach_rs6k;
500 break;
501 default:
502 arch = bfd_arch_powerpc;
503 mach = bfd_mach_ppc;
504 break;
505 }
506 bfd_default_set_arch_mach (abfd, arch, mach);
507 }
508
509 /* .stack section. */
510 if (!make_bfd_asection (abfd, ".stack",
511 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
512 c_size, c_stackend - c_size, c_stack))
513 goto fail;
514
515 /* .reg section for all registers. */
516 if (!make_bfd_asection (abfd, ".reg",
517 SEC_HAS_CONTENTS,
518 c_regsize, (bfd_vma) 0, c_regoff))
519 goto fail;
520
521 if (c_extoff)
522 {
523 if (!make_bfd_asection (abfd, ".aix-vmx",
524 SEC_HAS_CONTENTS,
525 560, (bfd_vma) 0, c_extoff))
526 goto fail;
527
528 if (!make_bfd_asection (abfd, ".aix-vsx",
529 SEC_HAS_CONTENTS,
530 256, (bfd_vma) 0, c_extoff + 584))
531 goto fail;
532 }
533
534 /* .ldinfo section.
535 To actually find out how long this section is in this particular
536 core dump would require going down the whole list of struct ld_info's.
537 See if we can just fake it. */
538 if (!make_bfd_asection (abfd, ".ldinfo",
539 SEC_HAS_CONTENTS,
540 c_lsize, (bfd_vma) 0, c_loader))
541 goto fail;
542
543 #ifndef CORE_VERSION_1
544 /* .data section if present.
545 AIX 3 dumps the complete data section and sets FULL_CORE if the
546 ulimit is large enough, otherwise the data section is omitted.
547 AIX 4 sets FULL_CORE even if the core file is truncated, we have
548 to examine core.c_datasize below to find out the actual size of
549 the .data section. */
550 if (c_flag & FULL_CORE)
551 {
552 if (!make_bfd_asection (abfd, ".data",
553 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
554 (bfd_size_type) core.old.c_u.u_dsize,
555 (bfd_vma)
556 CDATA_ADDR (core.old.c_u.u_dsize),
557 c_stack + c_size))
558 goto fail;
559 }
560 #endif
561
562 #ifdef CORE_VERSION_1
563 /* AIX 4 adds data sections from loaded objects to the core file,
564 which can be found by examining ldinfo, and anonymously mmapped
565 regions. */
566 {
567 LdInfo ldinfo;
568 bfd_size_type ldi_datasize;
569 file_ptr ldi_core;
570 uint ldi_next;
571 bfd_vma ldi_dataorg;
572 bfd_vma core_dataorg;
573
574 /* Fields from new and old core structures. */
575 bfd_size_type c_datasize, c_vmregions;
576 file_ptr c_data, c_vmm;
577
578 if (CORE_NEW (core))
579 {
580 c_datasize = CNEW_DATASIZE (core.new_dump);
581 c_data = (file_ptr) core.new_dump.c_data;
582 c_vmregions = core.new_dump.c_vmregions;
583 c_vmm = (file_ptr) core.new_dump.c_vmm;
584 }
585 #ifndef BFD64
586 else
587 {
588 c_datasize = core.old.c_datasize;
589 c_data = (file_ptr) (ptr_to_uint) core.old.c_data;
590 c_vmregions = core.old.c_vmregions;
591 c_vmm = (file_ptr) (ptr_to_uint) core.old.c_vmm;
592 }
593 #endif
594
595 /* .data section from executable. */
596 if (c_datasize)
597 {
598 /* If Large Memory Model is used, then the .data segment should start from
599 BDATAORG which has been defined in the system header files. */
600
601 if (c_flag & CORE_BIGDATA)
602 core_dataorg = BDATAORG;
603 else
604 core_dataorg = CDATA_ADDR (c_datasize);
605
606 if (!make_bfd_asection (abfd, ".data",
607 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
608 c_datasize,
609 (bfd_vma) core_dataorg,
610 c_data))
611 goto fail;
612 }
613
614 /* .data sections from loaded objects. */
615 if (proc64)
616 size = (unsigned long) ((LdInfo *) 0)->l64.ldinfo_filename;
617 else
618 size = (unsigned long) ((LdInfo *) 0)->l32.ldinfo_filename;
619
620 while (1)
621 {
622 if (bfd_seek (abfd, c_loader, SEEK_SET) != 0)
623 goto fail;
624 if (bfd_bread (&ldinfo, size, abfd) != size)
625 goto fail;
626
627 if (proc64)
628 {
629 ldi_core = ldinfo.l64.ldinfo_core;
630 ldi_datasize = ldinfo.l64.ldinfo_datasize;
631 ldi_dataorg = (bfd_vma) ldinfo.l64.ldinfo_dataorg;
632 ldi_next = ldinfo.l64.ldinfo_next;
633 }
634 else
635 {
636 ldi_core = ldinfo.l32.ldinfo_core;
637 ldi_datasize = ldinfo.l32.ldinfo_datasize;
638 ldi_dataorg = (bfd_vma) (ptr_to_uint) ldinfo.l32.ldinfo_dataorg;
639 ldi_next = ldinfo.l32.ldinfo_next;
640 }
641
642 if (ldi_core)
643 if (!make_bfd_asection (abfd, ".data",
644 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
645 ldi_datasize, ldi_dataorg, ldi_core))
646 goto fail;
647
648 if (ldi_next == 0)
649 break;
650 c_loader += ldi_next;
651 }
652
653 /* .vmdata sections from anonymously mmapped regions. */
654 if (c_vmregions)
655 {
656 bfd_size_type i;
657
658 if (bfd_seek (abfd, c_vmm, SEEK_SET) != 0)
659 goto fail;
660
661 for (i = 0; i < c_vmregions; i++)
662 {
663 VmInfo vminfo;
664 bfd_size_type vminfo_size;
665 file_ptr vminfo_offset;
666 bfd_vma vminfo_addr;
667
668 #ifndef BFD64
669 size = CORE_NEW (core) ? sizeof (vminfo.new_dump) : sizeof (vminfo.old);
670 #else
671 size = sizeof (vminfo.new_dump);
672 #endif
673 if (bfd_bread (&vminfo, size, abfd) != size)
674 goto fail;
675
676 if (CORE_NEW (core))
677 {
678 vminfo_addr = (bfd_vma) vminfo.new_dump.vminfo_addr;
679 vminfo_size = vminfo.new_dump.vminfo_size;
680 vminfo_offset = vminfo.new_dump.vminfo_offset;
681 }
682 #ifndef BFD64
683 else
684 {
685 vminfo_addr = (bfd_vma) (ptr_to_uint) vminfo.old.vminfo_addr;
686 vminfo_size = vminfo.old.vminfo_size;
687 vminfo_offset = vminfo.old.vminfo_offset;
688 }
689 #endif
690
691 if (vminfo_offset)
692 if (!make_bfd_asection (abfd, ".vmdata",
693 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
694 vminfo_size, vminfo_addr,
695 vminfo_offset))
696 goto fail;
697 }
698 }
699 }
700 #endif
701
702 return _bfd_no_cleanup;
703
704 fail:
705 bfd_release (abfd, abfd->tdata.any);
706 abfd->tdata.any = NULL;
707 bfd_section_list_clear (abfd);
708 return NULL;
709 }
710
711 /* Return `TRUE' if given core is from the given executable. */
712
713 bool
714 rs6000coff_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)
715 {
716 CoreHdr core;
717 bfd_size_type size;
718 char *path, *s;
719 size_t alloc;
720 const char *str1, *str2;
721 bool ret;
722 file_ptr c_loader;
723
724 if (!read_hdr (core_bfd, &core))
725 return false;
726
727 if (CORE_NEW (core))
728 c_loader = CNEW_LOADER (core.new_dump);
729 #ifndef BFD64
730 else
731 c_loader = (file_ptr) (ptr_to_uint) COLD_LOADER (core.old);
732 #endif
733
734 if (CORE_NEW (core) && CNEW_PROC64 (core.new_dump))
735 size = (int) ((LdInfo *) 0)->l64.ldinfo_filename;
736 else
737 size = (int) ((LdInfo *) 0)->l32.ldinfo_filename;
738
739 if (bfd_seek (core_bfd, c_loader + size, SEEK_SET) != 0)
740 return false;
741
742 alloc = 100;
743 path = bfd_malloc ((bfd_size_type) alloc);
744 if (path == NULL)
745 return false;
746 s = path;
747
748 while (1)
749 {
750 if (bfd_bread (s, (bfd_size_type) 1, core_bfd) != 1)
751 {
752 free (path);
753 return false;
754 }
755 if (*s == '\0')
756 break;
757 ++s;
758 if (s == path + alloc)
759 {
760 char *n;
761
762 alloc *= 2;
763 n = bfd_realloc (path, (bfd_size_type) alloc);
764 if (n == NULL)
765 {
766 free (path);
767 return false;
768 }
769 s = n + (path - s);
770 path = n;
771 }
772 }
773
774 str1 = strrchr (path, '/');
775 str2 = strrchr (bfd_get_filename (exec_bfd), '/');
776
777 /* step over character '/' */
778 str1 = str1 != NULL ? str1 + 1 : path;
779 str2 = str2 != NULL ? str2 + 1 : bfd_get_filename (exec_bfd);
780
781 if (strcmp (str1, str2) == 0)
782 ret = true;
783 else
784 ret = false;
785
786 free (path);
787
788 return ret;
789 }
790
791 char *
792 rs6000coff_core_file_failing_command (bfd *abfd)
793 {
794 CoreHdr *core = core_hdr (abfd);
795 #ifndef BFD64
796 char *com = CORE_NEW (*core) ?
797 CNEW_COMM (core->new_dump) : COLD_COMM (core->old);
798 #else
799 char *com = CNEW_COMM (core->new_dump);
800 #endif
801
802 if (*com)
803 return com;
804 else
805 return 0;
806 }
807
808 int
809 rs6000coff_core_file_failing_signal (bfd *abfd)
810 {
811 CoreHdr *core = core_hdr (abfd);
812 #ifndef BFD64
813 return CORE_NEW (*core) ? core->new_dump.c_signo : core->old.c_signo;
814 #else
815 return core->new_dump.c_signo;
816 #endif
817 }
818
819 #endif /* AIX_CORE */