bfd/rs6000-core.c

   1 /* IBM RS/6000 "XCOFF" back-end for BFD.
   2    Copyright (C) 1990-2024 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, 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_read (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_read ((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_read (&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_read (&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_read (s, 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 */