bfd/rs6000-core.c

   1 /* IBM RS/6000 "XCOFF" back-end for BFD.
   2    Copyright (C) 1990-2017 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)   (!(c).new_dump.c_entries)
 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 const bfd_target * rs6000coff_core_p (bfd *abfd);
 281 bfd_boolean rs6000coff_core_file_matches_executable_p (bfd *core_bfd,
 282                                                        bfd *exec_bfd);
 283 char * rs6000coff_core_file_failing_command (bfd *abfd);
 284 int rs6000coff_core_file_failing_signal (bfd *abfd);
 285
 286 /* Try to read into CORE the header from the core file associated with ABFD.
 287    Return success.  */
 288
 289 static bfd_boolean
 290 read_hdr (bfd *abfd, CoreHdr *core)
 291 {
 292   bfd_size_type size;
 293
 294   if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
 295     return FALSE;
 296
 297   /* Read the leading portion that old and new core dump structures have in
 298      common.  */
 299   size = CORE_COMMONSZ;
 300   if (bfd_bread (core, size, abfd) != size)
 301     return FALSE;
 302
 303   /* Read the trailing portion of the structure.  */
 304   if (CORE_NEW (*core))
 305     size = sizeof (core->new_dump);
 306 #ifndef BFD64
 307   else
 308     size = sizeof (core->old);
 309 #endif
 310   size -= CORE_COMMONSZ;
 311   return bfd_bread ((char *) core + CORE_COMMONSZ, size, abfd) == size;
 312 }
 313
 314 static asection *
 315 make_bfd_asection (bfd *abfd, const char *name, flagword flags,
 316                    bfd_size_type size, bfd_vma vma, file_ptr filepos)
 317 {
 318   asection *asect;
 319
 320   asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
 321   if (!asect)
 322     return NULL;
 323
 324   asect->size = size;
 325   asect->vma = vma;
 326   asect->filepos = filepos;
 327   asect->alignment_power = 8;
 328
 329   return asect;
 330 }
 331
 332 /* Decide if a given bfd represents a `core' file or not. There really is no
 333    magic number or anything like, in rs6000coff.  */
 334
 335 const bfd_target *
 336 rs6000coff_core_p (bfd *abfd)
 337 {
 338   CoreHdr core;
 339   struct stat statbuf;
 340   bfd_size_type size;
 341   char *tmpptr;
 342
 343   /* Values from new and old core structures.  */
 344   int c_flag;
 345   file_ptr c_stack, c_regoff, c_loader;
 346   bfd_size_type c_size, c_regsize, c_lsize;
 347   bfd_vma c_stackend;
 348   void *c_regptr;
 349   int proc64;
 350
 351   if (!read_hdr (abfd, &core))
 352     {
 353       if (bfd_get_error () != bfd_error_system_call)
 354         bfd_set_error (bfd_error_wrong_format);
 355       return NULL;
 356     }
 357
 358   /* This isn't the right handler for 64-bit core files on AIX 5.x.  */
 359   if (CORE_NEW (core) && CNEW_IS_CORE_DUMPXX (core))
 360     {
 361       bfd_set_error (bfd_error_wrong_format);
 362       return NULL;
 363     }
 364
 365   /* Copy fields from new or old core structure.  */
 366   if (CORE_NEW (core))
 367     {
 368       c_flag = core.new_dump.c_flag;
 369       c_stack = (file_ptr) core.new_dump.c_stack;
 370       c_size = core.new_dump.c_size;
 371       c_stackend = CNEW_STACKORG (core.new_dump) + c_size;
 372       c_lsize = CNEW_LSIZE (core.new_dump);
 373       c_loader = CNEW_LOADER (core.new_dump);
 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 (_("%s: warning core file truncated"),
 472                         bfd_get_filename (abfd));
 473
 474   /* Allocate core file header.  */
 475 #ifndef BFD64
 476   size = CORE_NEW (core) ? sizeof (core.new_dump) : sizeof (core.old);
 477 #else
 478   size =  sizeof (core.new_dump);
 479 #endif
 480   tmpptr = (char *) bfd_zalloc (abfd, (bfd_size_type) size);
 481   if (!tmpptr)
 482     return NULL;
 483
 484   /* Copy core file header.  */
 485   memcpy (tmpptr, &core, size);
 486   set_tdata (abfd, tmpptr);
 487
 488   /* Set architecture.  */
 489   if (CORE_NEW (core))
 490     {
 491       enum bfd_architecture arch;
 492       unsigned long mach;
 493
 494       switch (CNEW_IMPL (core.new_dump))
 495         {
 496         case POWER_RS1:
 497         case POWER_RSC:
 498         case POWER_RS2:
 499           arch = bfd_arch_rs6000;
 500           mach = bfd_mach_rs6k;
 501           break;
 502         default:
 503           arch = bfd_arch_powerpc;
 504           mach = bfd_mach_ppc;
 505           break;
 506         }
 507       bfd_default_set_arch_mach (abfd, arch, mach);
 508     }
 509
 510   /* .stack section.  */
 511   if (!make_bfd_asection (abfd, ".stack",
 512                           SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
 513                           c_size, c_stackend - c_size, c_stack))
 514     goto fail;
 515
 516   /* .reg section for all registers.  */
 517   if (!make_bfd_asection (abfd, ".reg",
 518                           SEC_HAS_CONTENTS,
 519                           c_regsize, (bfd_vma) 0, c_regoff))
 520     goto fail;
 521
 522   /* .ldinfo section.
 523      To actually find out how long this section is in this particular
 524      core dump would require going down the whole list of struct ld_info's.
 525      See if we can just fake it.  */
 526   if (!make_bfd_asection (abfd, ".ldinfo",
 527                           SEC_HAS_CONTENTS,
 528                           c_lsize, (bfd_vma) 0, c_loader))
 529     goto fail;
 530
 531 #ifndef CORE_VERSION_1
 532   /* .data section if present.
 533      AIX 3 dumps the complete data section and sets FULL_CORE if the
 534      ulimit is large enough, otherwise the data section is omitted.
 535      AIX 4 sets FULL_CORE even if the core file is truncated, we have
 536      to examine core.c_datasize below to find out the actual size of
 537      the .data section.  */
 538   if (c_flag & FULL_CORE)
 539     {
 540       if (!make_bfd_asection (abfd, ".data",
 541                               SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
 542                               (bfd_size_type) core.old.c_u.u_dsize,
 543                               (bfd_vma)
 544                                 CDATA_ADDR (core.old.c_u.u_dsize),
 545                               c_stack + c_size))
 546         goto fail;
 547     }
 548 #endif
 549
 550 #ifdef CORE_VERSION_1
 551   /* AIX 4 adds data sections from loaded objects to the core file,
 552      which can be found by examining ldinfo, and anonymously mmapped
 553      regions.  */
 554   {
 555     LdInfo ldinfo;
 556     bfd_size_type ldi_datasize;
 557     file_ptr ldi_core;
 558     uint ldi_next;
 559     bfd_vma ldi_dataorg;
 560     bfd_vma core_dataorg;
 561
 562     /* Fields from new and old core structures.  */
 563     bfd_size_type c_datasize, c_vmregions;
 564     file_ptr c_data, c_vmm;
 565
 566     if (CORE_NEW (core))
 567       {
 568         c_datasize = CNEW_DATASIZE (core.new_dump);
 569         c_data = (file_ptr) core.new_dump.c_data;
 570         c_vmregions = core.new_dump.c_vmregions;
 571         c_vmm = (file_ptr) core.new_dump.c_vmm;
 572       }
 573 #ifndef BFD64
 574     else
 575       {
 576         c_datasize = core.old.c_datasize;
 577         c_data = (file_ptr) (ptr_to_uint) core.old.c_data;
 578         c_vmregions = core.old.c_vmregions;
 579         c_vmm = (file_ptr) (ptr_to_uint) core.old.c_vmm;
 580       }
 581 #endif
 582
 583     /* .data section from executable.  */
 584     if (c_datasize)
 585       {
 586         /* If Large Memory Model is used, then the .data segment should start from
 587            BDATAORG which has been defined in the system header files. */
 588
 589         if (c_flag & CORE_BIGDATA)
 590           core_dataorg = BDATAORG;
 591         else
 592           core_dataorg = CDATA_ADDR (c_datasize);
 593
 594         if (!make_bfd_asection (abfd, ".data",
 595                                 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
 596                                 c_datasize,
 597                                 (bfd_vma) core_dataorg,
 598                                 c_data))
 599           goto fail;
 600       }
 601
 602     /* .data sections from loaded objects.  */
 603     if (proc64)
 604       size = (unsigned long) ((LdInfo *) 0)->l64.ldinfo_filename;
 605     else
 606       size = (unsigned long) ((LdInfo *) 0)->l32.ldinfo_filename;
 607
 608     while (1)
 609       {
 610         if (bfd_seek (abfd, c_loader, SEEK_SET) != 0)
 611           goto fail;
 612         if (bfd_bread (&ldinfo, size, abfd) != size)
 613           goto fail;
 614
 615         if (proc64)
 616           {
 617             ldi_core = ldinfo.l64.ldinfo_core;
 618             ldi_datasize = ldinfo.l64.ldinfo_datasize;
 619             ldi_dataorg = (bfd_vma) ldinfo.l64.ldinfo_dataorg;
 620             ldi_next = ldinfo.l64.ldinfo_next;
 621           }
 622         else
 623           {
 624             ldi_core = ldinfo.l32.ldinfo_core;
 625             ldi_datasize = ldinfo.l32.ldinfo_datasize;
 626             ldi_dataorg = (bfd_vma) (ptr_to_uint) ldinfo.l32.ldinfo_dataorg;
 627             ldi_next = ldinfo.l32.ldinfo_next;
 628           }
 629
 630         if (ldi_core)
 631           if (!make_bfd_asection (abfd, ".data",
 632                                   SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
 633                                   ldi_datasize, ldi_dataorg, ldi_core))
 634             goto fail;
 635
 636         if (ldi_next == 0)
 637           break;
 638         c_loader += ldi_next;
 639       }
 640
 641     /* .vmdata sections from anonymously mmapped regions.  */
 642     if (c_vmregions)
 643       {
 644         bfd_size_type i;
 645
 646         if (bfd_seek (abfd, c_vmm, SEEK_SET) != 0)
 647           goto fail;
 648
 649         for (i = 0; i < c_vmregions; i++)
 650           {
 651             VmInfo vminfo;
 652             bfd_size_type vminfo_size;
 653             file_ptr vminfo_offset;
 654             bfd_vma vminfo_addr;
 655
 656 #ifndef BFD64
 657             size = CORE_NEW (core) ? sizeof (vminfo.new_dump) : sizeof (vminfo.old);
 658 #else
 659             size = sizeof (vminfo.new_dump);
 660 #endif
 661             if (bfd_bread (&vminfo, size, abfd) != size)
 662               goto fail;
 663
 664             if (CORE_NEW (core))
 665               {
 666                 vminfo_addr = (bfd_vma) vminfo.new_dump.vminfo_addr;
 667                 vminfo_size = vminfo.new_dump.vminfo_size;
 668                 vminfo_offset = vminfo.new_dump.vminfo_offset;
 669               }
 670 #ifndef BFD64
 671             else
 672               {
 673                 vminfo_addr = (bfd_vma) (ptr_to_uint) vminfo.old.vminfo_addr;
 674                 vminfo_size = vminfo.old.vminfo_size;
 675                 vminfo_offset = vminfo.old.vminfo_offset;
 676               }
 677 #endif
 678
 679             if (vminfo_offset)
 680               if (!make_bfd_asection (abfd, ".vmdata",
 681                                       SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
 682                                       vminfo_size, vminfo_addr,
 683                                       vminfo_offset))
 684                 goto fail;
 685           }
 686       }
 687   }
 688 #endif
 689
 690   return abfd->xvec;            /* This is garbage for now.  */
 691
 692  fail:
 693   bfd_release (abfd, abfd->tdata.any);
 694   abfd->tdata.any = NULL;
 695   bfd_section_list_clear (abfd);
 696   return NULL;
 697 }
 698
 699 /* Return `TRUE' if given core is from the given executable.  */
 700
 701 bfd_boolean
 702 rs6000coff_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)
 703 {
 704   CoreHdr core;
 705   bfd_size_type size;
 706   char *path, *s;
 707   size_t alloc;
 708   const char *str1, *str2;
 709   bfd_boolean ret;
 710   file_ptr c_loader;
 711
 712   if (!read_hdr (core_bfd, &core))
 713     return FALSE;
 714
 715   if (CORE_NEW (core))
 716     c_loader = CNEW_LOADER (core.new_dump);
 717 #ifndef BFD64
 718   else
 719     c_loader = (file_ptr) (ptr_to_uint) COLD_LOADER (core.old);
 720 #endif
 721
 722   if (CORE_NEW (core) && CNEW_PROC64 (core.new_dump))
 723     size = (int) ((LdInfo *) 0)->l64.ldinfo_filename;
 724   else
 725     size = (int) ((LdInfo *) 0)->l32.ldinfo_filename;
 726
 727   if (bfd_seek (core_bfd, c_loader + size, SEEK_SET) != 0)
 728     return FALSE;
 729
 730   alloc = 100;
 731   path = bfd_malloc ((bfd_size_type) alloc);
 732   if (path == NULL)
 733     return FALSE;
 734   s = path;
 735
 736   while (1)
 737     {
 738       if (bfd_bread (s, (bfd_size_type) 1, core_bfd) != 1)
 739         {
 740           free (path);
 741           return FALSE;
 742         }
 743       if (*s == '\0')
 744         break;
 745       ++s;
 746       if (s == path + alloc)
 747         {
 748           char *n;
 749
 750           alloc *= 2;
 751           n = bfd_realloc (path, (bfd_size_type) alloc);
 752           if (n == NULL)
 753             {
 754               free (path);
 755               return FALSE;
 756             }
 757           s = n + (path - s);
 758           path = n;
 759         }
 760     }
 761
 762   str1 = strrchr (path, '/');
 763   str2 = strrchr (exec_bfd->filename, '/');
 764
 765   /* step over character '/' */
 766   str1 = str1 != NULL ? str1 + 1 : path;
 767   str2 = str2 != NULL ? str2 + 1 : exec_bfd->filename;
 768
 769   if (strcmp (str1, str2) == 0)
 770     ret = TRUE;
 771   else
 772     ret = FALSE;
 773
 774   free (path);
 775
 776   return ret;
 777 }
 778
 779 char *
 780 rs6000coff_core_file_failing_command (bfd *abfd)
 781 {
 782   CoreHdr *core = core_hdr (abfd);
 783 #ifndef BFD64
 784   char *com = CORE_NEW (*core) ?
 785     CNEW_COMM (core->new_dump) : COLD_COMM (core->old);
 786 #else
 787   char *com = CNEW_COMM (core->new_dump);
 788 #endif
 789
 790   if (*com)
 791     return com;
 792   else
 793     return 0;
 794 }
 795
 796 int
 797 rs6000coff_core_file_failing_signal (bfd *abfd)
 798 {
 799   CoreHdr *core = core_hdr (abfd);
 800 #ifndef BFD64
 801   return CORE_NEW (*core) ? core->new_dump.c_signo : core->old.c_signo;
 802 #else
 803   return  core->new_dump.c_signo;
 804 #endif
 805 }
 806
 807 #endif /* AIX_CORE */