1 /* IBM RS/6000 "XCOFF" back-end for BFD.
2 Copyright (C) 1990-2022 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
read_hdr(bfd * abfd,CoreHdr * core)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 *
make_bfd_asection(bfd * abfd,const char * name,flagword flags,bfd_size_type size,bfd_vma vma,file_ptr filepos)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
rs6000coff_core_p(bfd * abfd)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;
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 #ifndef BFD64
374 proc64 = CNEW_PROC64 (core.new_dump);
375 }
376 else
377 {
378 c_flag = core.old.c_flag;
379 c_stack = (file_ptr) (ptr_to_uint) core.old.c_stack;
380 c_size = core.old.c_size;
381 c_stackend = COLD_STACKEND;
382 c_lsize = 0x7ffffff;
383 c_loader = (file_ptr) (ptr_to_uint) COLD_LOADER (core.old);
384 #endif
385 proc64 = 0;
386 }
387
388 if (proc64)
389 {
390 c_regsize = sizeof (CNEW_CONTEXT64 (core.new_dump));
391 c_regptr = &CNEW_CONTEXT64 (core.new_dump);
392 }
393 else if (CORE_NEW (core))
394 {
395 c_regsize = sizeof (CNEW_MSTSAVE (core.new_dump));
396 c_regptr = &CNEW_MSTSAVE (core.new_dump);
397 }
398 #ifndef BFD64
399 else
400 {
401 c_regsize = sizeof (COLD_MSTSAVE (core.old));
402 c_regptr = &COLD_MSTSAVE (core.old);
403 }
404 #endif
405 c_regoff = (char *) c_regptr - (char *) &core;
406
407 if (bfd_stat (abfd, &statbuf) < 0)
408 {
409 bfd_set_error (bfd_error_system_call);
410 return NULL;
411 }
412
413 /* If the core file ulimit is too small, the system will first
414 omit the data segment, then omit the stack, then decline to
415 dump core altogether (as far as I know UBLOCK_VALID and LE_VALID
416 are always set) (this is based on experimentation on AIX 3.2).
417 Now, the thing is that GDB users will be surprised
418 if segments just silently don't appear (well, maybe they would
419 think to check "info files", I don't know).
420
421 For the data segment, we have no choice but to keep going if it's
422 not there, since the default behavior is not to dump it (regardless
423 of the ulimit, it's based on SA_FULLDUMP). But for the stack segment,
424 if it's not there, we refuse to have anything to do with this core
425 file. The usefulness of a core dump without a stack segment is pretty
426 limited anyway. */
427
428 if (!(c_flag & UBLOCK_VALID)
429 || !(c_flag & LE_VALID))
430 {
431 bfd_set_error (bfd_error_wrong_format);
432 return NULL;
433 }
434
435 if (!(c_flag & USTACK_VALID))
436 {
437 bfd_set_error (bfd_error_file_truncated);
438 return NULL;
439 }
440
441 /* Don't check the core file size for a full core, AIX 4.1 includes
442 additional shared library sections in a full core. */
443 if (!(c_flag & (FULL_CORE | CORE_TRUNC)))
444 {
445 /* If the size is wrong, it means we're misinterpreting something. */
446 if (c_stack + (file_ptr) c_size != statbuf.st_size)
447 {
448 bfd_set_error (bfd_error_wrong_format);
449 return NULL;
450 }
451 }
452
453 /* Sanity check on the c_tab field. */
454 if (!CORE_NEW (core)
455 && (
456 #ifndef BFD64
457 c_loader < (file_ptr) sizeof core.old
458 #else
459 c_loader < (file_ptr) sizeof core.new_dump
460 #endif
461 || c_loader >= statbuf.st_size
462 || c_loader >= c_stack))
463 {
464 bfd_set_error (bfd_error_wrong_format);
465 return NULL;
466 }
467
468 /* Issue warning if the core file was truncated during writing. */
469 if (c_flag & CORE_TRUNC)
470 _bfd_error_handler (_("%pB: warning core file truncated"), abfd);
471
472 /* Allocate core file header. */
473 #ifndef BFD64
474 size = CORE_NEW (core) ? sizeof (core.new_dump) : sizeof (core.old);
475 #else
476 size = sizeof (core.new_dump);
477 #endif
478 tmpptr = (char *) bfd_zalloc (abfd, (bfd_size_type) size);
479 if (!tmpptr)
480 return NULL;
481
482 /* Copy core file header. */
483 memcpy (tmpptr, &core, size);
484 set_tdata (abfd, tmpptr);
485
486 /* Set architecture. */
487 if (CORE_NEW (core))
488 {
489 enum bfd_architecture arch;
490 unsigned long mach;
491
492 switch (CNEW_IMPL (core.new_dump))
493 {
494 case POWER_RS1:
495 case POWER_RSC:
496 case POWER_RS2:
497 arch = bfd_arch_rs6000;
498 mach = bfd_mach_rs6k;
499 break;
500 default:
501 arch = bfd_arch_powerpc;
502 mach = bfd_mach_ppc;
503 break;
504 }
505 bfd_default_set_arch_mach (abfd, arch, mach);
506 }
507
508 /* .stack section. */
509 if (!make_bfd_asection (abfd, ".stack",
510 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
511 c_size, c_stackend - c_size, c_stack))
512 goto fail;
513
514 /* .reg section for all registers. */
515 if (!make_bfd_asection (abfd, ".reg",
516 SEC_HAS_CONTENTS,
517 c_regsize, (bfd_vma) 0, c_regoff))
518 goto fail;
519
520 /* .ldinfo section.
521 To actually find out how long this section is in this particular
522 core dump would require going down the whole list of struct ld_info's.
523 See if we can just fake it. */
524 if (!make_bfd_asection (abfd, ".ldinfo",
525 SEC_HAS_CONTENTS,
526 c_lsize, (bfd_vma) 0, c_loader))
527 goto fail;
528
529 #ifndef CORE_VERSION_1
530 /* .data section if present.
531 AIX 3 dumps the complete data section and sets FULL_CORE if the
532 ulimit is large enough, otherwise the data section is omitted.
533 AIX 4 sets FULL_CORE even if the core file is truncated, we have
534 to examine core.c_datasize below to find out the actual size of
535 the .data section. */
536 if (c_flag & FULL_CORE)
537 {
538 if (!make_bfd_asection (abfd, ".data",
539 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
540 (bfd_size_type) core.old.c_u.u_dsize,
541 (bfd_vma)
542 CDATA_ADDR (core.old.c_u.u_dsize),
543 c_stack + c_size))
544 goto fail;
545 }
546 #endif
547
548 #ifdef CORE_VERSION_1
549 /* AIX 4 adds data sections from loaded objects to the core file,
550 which can be found by examining ldinfo, and anonymously mmapped
551 regions. */
552 {
553 LdInfo ldinfo;
554 bfd_size_type ldi_datasize;
555 file_ptr ldi_core;
556 uint ldi_next;
557 bfd_vma ldi_dataorg;
558 bfd_vma core_dataorg;
559
560 /* Fields from new and old core structures. */
561 bfd_size_type c_datasize, c_vmregions;
562 file_ptr c_data, c_vmm;
563
564 if (CORE_NEW (core))
565 {
566 c_datasize = CNEW_DATASIZE (core.new_dump);
567 c_data = (file_ptr) core.new_dump.c_data;
568 c_vmregions = core.new_dump.c_vmregions;
569 c_vmm = (file_ptr) core.new_dump.c_vmm;
570 }
571 #ifndef BFD64
572 else
573 {
574 c_datasize = core.old.c_datasize;
575 c_data = (file_ptr) (ptr_to_uint) core.old.c_data;
576 c_vmregions = core.old.c_vmregions;
577 c_vmm = (file_ptr) (ptr_to_uint) core.old.c_vmm;
578 }
579 #endif
580
581 /* .data section from executable. */
582 if (c_datasize)
583 {
584 /* If Large Memory Model is used, then the .data segment should start from
585 BDATAORG which has been defined in the system header files. */
586
587 if (c_flag & CORE_BIGDATA)
588 core_dataorg = BDATAORG;
589 else
590 core_dataorg = CDATA_ADDR (c_datasize);
591
592 if (!make_bfd_asection (abfd, ".data",
593 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
594 c_datasize,
595 (bfd_vma) core_dataorg,
596 c_data))
597 goto fail;
598 }
599
600 /* .data sections from loaded objects. */
601 if (proc64)
602 size = (unsigned long) ((LdInfo *) 0)->l64.ldinfo_filename;
603 else
604 size = (unsigned long) ((LdInfo *) 0)->l32.ldinfo_filename;
605
606 while (1)
607 {
608 if (bfd_seek (abfd, c_loader, SEEK_SET) != 0)
609 goto fail;
610 if (bfd_bread (&ldinfo, size, abfd) != size)
611 goto fail;
612
613 if (proc64)
614 {
615 ldi_core = ldinfo.l64.ldinfo_core;
616 ldi_datasize = ldinfo.l64.ldinfo_datasize;
617 ldi_dataorg = (bfd_vma) ldinfo.l64.ldinfo_dataorg;
618 ldi_next = ldinfo.l64.ldinfo_next;
619 }
620 else
621 {
622 ldi_core = ldinfo.l32.ldinfo_core;
623 ldi_datasize = ldinfo.l32.ldinfo_datasize;
624 ldi_dataorg = (bfd_vma) (ptr_to_uint) ldinfo.l32.ldinfo_dataorg;
625 ldi_next = ldinfo.l32.ldinfo_next;
626 }
627
628 if (ldi_core)
629 if (!make_bfd_asection (abfd, ".data",
630 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
631 ldi_datasize, ldi_dataorg, ldi_core))
632 goto fail;
633
634 if (ldi_next == 0)
635 break;
636 c_loader += ldi_next;
637 }
638
639 /* .vmdata sections from anonymously mmapped regions. */
640 if (c_vmregions)
641 {
642 bfd_size_type i;
643
644 if (bfd_seek (abfd, c_vmm, SEEK_SET) != 0)
645 goto fail;
646
647 for (i = 0; i < c_vmregions; i++)
648 {
649 VmInfo vminfo;
650 bfd_size_type vminfo_size;
651 file_ptr vminfo_offset;
652 bfd_vma vminfo_addr;
653
654 #ifndef BFD64
655 size = CORE_NEW (core) ? sizeof (vminfo.new_dump) : sizeof (vminfo.old);
656 #else
657 size = sizeof (vminfo.new_dump);
658 #endif
659 if (bfd_bread (&vminfo, size, abfd) != size)
660 goto fail;
661
662 if (CORE_NEW (core))
663 {
664 vminfo_addr = (bfd_vma) vminfo.new_dump.vminfo_addr;
665 vminfo_size = vminfo.new_dump.vminfo_size;
666 vminfo_offset = vminfo.new_dump.vminfo_offset;
667 }
668 #ifndef BFD64
669 else
670 {
671 vminfo_addr = (bfd_vma) (ptr_to_uint) vminfo.old.vminfo_addr;
672 vminfo_size = vminfo.old.vminfo_size;
673 vminfo_offset = vminfo.old.vminfo_offset;
674 }
675 #endif
676
677 if (vminfo_offset)
678 if (!make_bfd_asection (abfd, ".vmdata",
679 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
680 vminfo_size, vminfo_addr,
681 vminfo_offset))
682 goto fail;
683 }
684 }
685 }
686 #endif
687
688 return _bfd_no_cleanup;
689
690 fail:
691 bfd_release (abfd, abfd->tdata.any);
692 abfd->tdata.any = NULL;
693 bfd_section_list_clear (abfd);
694 return NULL;
695 }
696
697 /* Return `TRUE' if given core is from the given executable. */
698
699 bool
rs6000coff_core_file_matches_executable_p(bfd * core_bfd,bfd * exec_bfd)700 rs6000coff_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)
701 {
702 CoreHdr core;
703 bfd_size_type size;
704 char *path, *s;
705 size_t alloc;
706 const char *str1, *str2;
707 bool ret;
708 file_ptr c_loader;
709
710 if (!read_hdr (core_bfd, &core))
711 return false;
712
713 if (CORE_NEW (core))
714 c_loader = CNEW_LOADER (core.new_dump);
715 #ifndef BFD64
716 else
717 c_loader = (file_ptr) (ptr_to_uint) COLD_LOADER (core.old);
718 #endif
719
720 if (CORE_NEW (core) && CNEW_PROC64 (core.new_dump))
721 size = (int) ((LdInfo *) 0)->l64.ldinfo_filename;
722 else
723 size = (int) ((LdInfo *) 0)->l32.ldinfo_filename;
724
725 if (bfd_seek (core_bfd, c_loader + size, SEEK_SET) != 0)
726 return false;
727
728 alloc = 100;
729 path = bfd_malloc ((bfd_size_type) alloc);
730 if (path == NULL)
731 return false;
732 s = path;
733
734 while (1)
735 {
736 if (bfd_bread (s, (bfd_size_type) 1, core_bfd) != 1)
737 {
738 free (path);
739 return false;
740 }
741 if (*s == '\0')
742 break;
743 ++s;
744 if (s == path + alloc)
745 {
746 char *n;
747
748 alloc *= 2;
749 n = bfd_realloc (path, (bfd_size_type) alloc);
750 if (n == NULL)
751 {
752 free (path);
753 return false;
754 }
755 s = n + (path - s);
756 path = n;
757 }
758 }
759
760 str1 = strrchr (path, '/');
761 str2 = strrchr (bfd_get_filename (exec_bfd), '/');
762
763 /* step over character '/' */
764 str1 = str1 != NULL ? str1 + 1 : path;
765 str2 = str2 != NULL ? str2 + 1 : bfd_get_filename (exec_bfd);
766
767 if (strcmp (str1, str2) == 0)
768 ret = true;
769 else
770 ret = false;
771
772 free (path);
773
774 return ret;
775 }
776
777 char *
rs6000coff_core_file_failing_command(bfd * abfd)778 rs6000coff_core_file_failing_command (bfd *abfd)
779 {
780 CoreHdr *core = core_hdr (abfd);
781 #ifndef BFD64
782 char *com = CORE_NEW (*core) ?
783 CNEW_COMM (core->new_dump) : COLD_COMM (core->old);
784 #else
785 char *com = CNEW_COMM (core->new_dump);
786 #endif
787
788 if (*com)
789 return com;
790 else
791 return 0;
792 }
793
794 int
rs6000coff_core_file_failing_signal(bfd * abfd)795 rs6000coff_core_file_failing_signal (bfd *abfd)
796 {
797 CoreHdr *core = core_hdr (abfd);
798 #ifndef BFD64
799 return CORE_NEW (*core) ? core->new_dump.c_signo : core->old.c_signo;
800 #else
801 return core->new_dump.c_signo;
802 #endif
803 }
804
805 #endif /* AIX_CORE */
806