bfd/rs6000-core.c

   1 /* IBM RS/6000 "XCOFF" back-end for BFD.
   2    Copyright (C) 1990-2021 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;
 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
 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 *
 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
 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 */