bfd/irix-core.c

   1 /* BFD back-end for Irix core files.
   2    Copyright 1993, 1994, 1996, 1999, 2001, 2002, 2004, 2005, 2006, 2007,
   3    2010, 2011, 2012  Free Software Foundation, Inc.
   4    Written by Stu Grossman, Cygnus Support.
   5    Converted to back-end form by Ian Lance Taylor, 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 file can only be compiled on systems which use Irix style core
  26    files (namely, Irix 4 and Irix 5, so far).  */
  27
  28 #include "sysdep.h"
  29 #include "bfd.h"
  30 #include "libbfd.h"
  31
  32 #ifdef IRIX_CORE
  33
  34 #include <core.out.h>
  35
  36 struct sgi_core_struct
  37 {
  38   int sig;
  39   char cmd[CORE_NAMESIZE];
  40 };
  41
  42 #define core_hdr(bfd) ((bfd)->tdata.sgi_core_data)
  43 #define core_signal(bfd) (core_hdr(bfd)->sig)
  44 #define core_command(bfd) (core_hdr(bfd)->cmd)
  45
  46 #define irix_core_core_file_matches_executable_p generic_core_file_matches_executable_p
  47 #define irix_core_core_file_pid _bfd_nocore_core_file_pid
  48
  49 static asection *make_bfd_asection
  50   (bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr);
  51
  52 /* Helper function for irix_core_core_file_p:
  53    32-bit and 64-bit versions.  */
  54
  55 #ifdef CORE_MAGIC64
  56 static int
  57 do_sections64 (bfd *abfd, struct coreout *coreout)
  58 {
  59   struct vmap64 vmap;
  60   char *secname;
  61   int i, val;
  62
  63   for (i = 0; i < coreout->c_nvmap; i++)
  64     {
  65       val = bfd_bread (&vmap, (bfd_size_type) sizeof vmap, abfd);
  66       if (val != sizeof vmap)
  67         break;
  68
  69       switch (vmap.v_type)
  70         {
  71         case VDATA:
  72           secname = ".data";
  73           break;
  74         case VSTACK:
  75           secname = ".stack";
  76           break;
  77 #ifdef VMAPFILE
  78         case VMAPFILE:
  79           secname = ".mapfile";
  80           break;
  81 #endif
  82         default:
  83           continue;
  84         }
  85
  86       /* A file offset of zero means that the
  87          section is not contained in the corefile.  */
  88       if (vmap.v_offset == 0)
  89         continue;
  90
  91       if (!make_bfd_asection (abfd, secname,
  92                               SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
  93                               vmap.v_len, vmap.v_vaddr, vmap.v_offset))
  94         /* Fail.  */
  95         return 0;
  96     }
  97
  98   return 1;
  99 }
 100 #endif
 101
 102 /* 32-bit version.  */
 103
 104 static int
 105 do_sections (bfd *abfd, struct coreout *coreout)
 106 {
 107   struct vmap vmap;
 108   char *secname;
 109   int i, val;
 110
 111   for (i = 0; i < coreout->c_nvmap; i++)
 112     {
 113       val = bfd_bread (&vmap, (bfd_size_type) sizeof vmap, abfd);
 114       if (val != sizeof vmap)
 115         break;
 116
 117       switch (vmap.v_type)
 118         {
 119         case VDATA:
 120           secname = ".data";
 121           break;
 122         case VSTACK:
 123           secname = ".stack";
 124           break;
 125 #ifdef VMAPFILE
 126         case VMAPFILE:
 127           secname = ".mapfile";
 128           break;
 129 #endif
 130         default:
 131           continue;
 132         }
 133
 134       /* A file offset of zero means that the
 135          section is not contained in the corefile.  */
 136       if (vmap.v_offset == 0)
 137         continue;
 138
 139       if (!make_bfd_asection (abfd, secname,
 140                               SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
 141                               vmap.v_len, vmap.v_vaddr, vmap.v_offset))
 142         /* Fail.  */
 143         return 0;
 144     }
 145   return 1;
 146 }
 147
 148 static asection *
 149 make_bfd_asection (bfd *abfd,
 150                    const char *name,
 151                    flagword flags,
 152                    bfd_size_type size,
 153                    bfd_vma vma,
 154                    file_ptr filepos)
 155 {
 156   asection *asect;
 157
 158   asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
 159   if (!asect)
 160     return NULL;
 161
 162   asect->size = size;
 163   asect->vma = vma;
 164   asect->filepos = filepos;
 165   asect->alignment_power = 4;
 166
 167   return asect;
 168 }
 169
 170 static const bfd_target *
 171 irix_core_core_file_p (bfd *abfd)
 172 {
 173   int val;
 174   struct coreout coreout;
 175   struct idesc *idg, *idf, *ids;
 176   bfd_size_type amt;
 177
 178   val = bfd_bread (&coreout, (bfd_size_type) sizeof coreout, abfd);
 179   if (val != sizeof coreout)
 180     {
 181       if (bfd_get_error () != bfd_error_system_call)
 182         bfd_set_error (bfd_error_wrong_format);
 183       return 0;
 184     }
 185
 186   if (coreout.c_version != CORE_VERSION1)
 187     return 0;
 188
 189   /* Have we got a corefile?  */
 190   switch (coreout.c_magic)
 191     {
 192     case CORE_MAGIC:    break;
 193 #ifdef CORE_MAGIC64
 194     case CORE_MAGIC64:  break;
 195 #endif
 196 #ifdef CORE_MAGICN32
 197     case CORE_MAGICN32: break;
 198 #endif
 199     default:            return 0;       /* Un-identifiable or not corefile.  */
 200     }
 201
 202   amt = sizeof (struct sgi_core_struct);
 203   core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, amt);
 204   if (!core_hdr (abfd))
 205     return NULL;
 206
 207   strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);
 208   core_signal (abfd) = coreout.c_sigcause;
 209
 210   if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)
 211     goto fail;
 212
 213   /* Process corefile sections.  */
 214 #ifdef CORE_MAGIC64
 215   if (coreout.c_magic == (int) CORE_MAGIC64)
 216     {
 217       if (! do_sections64 (abfd, & coreout))
 218         goto fail;
 219     }
 220   else
 221 #endif
 222     if (! do_sections (abfd, & coreout))
 223       goto fail;
 224
 225   /* Make sure that the regs are contiguous within the core file.  */
 226
 227   idg = &coreout.c_idesc[I_GPREGS];
 228   idf = &coreout.c_idesc[I_FPREGS];
 229   ids = &coreout.c_idesc[I_SPECREGS];
 230
 231   if (idg->i_offset + idg->i_len != idf->i_offset
 232       || idf->i_offset + idf->i_len != ids->i_offset)
 233     goto fail;                  /* Can't deal with non-contig regs */
 234
 235   if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)
 236     goto fail;
 237
 238   if (!make_bfd_asection (abfd, ".reg",
 239                           SEC_HAS_CONTENTS,
 240                           idg->i_len + idf->i_len + ids->i_len,
 241                           0,
 242                           idg->i_offset))
 243     goto fail;
 244
 245   /* OK, we believe you.  You're a core file (sure, sure).  */
 246   bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);
 247
 248   return abfd->xvec;
 249
 250  fail:
 251   bfd_release (abfd, core_hdr (abfd));
 252   core_hdr (abfd) = NULL;
 253   bfd_section_list_clear (abfd);
 254   return NULL;
 255 }
 256
 257 static char *
 258 irix_core_core_file_failing_command (bfd *abfd)
 259 {
 260   return core_command (abfd);
 261 }
 262
 263 static int
 264 irix_core_core_file_failing_signal (bfd *abfd)
 265 {
 266   return core_signal (abfd);
 267 }
 268
 269 /* If somebody calls any byte-swapping routines, shoot them.  */
 270 static void
 271 swap_abort(void)
 272 {
 273   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 274 }
 275
 276 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 277 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 278 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 279 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 280 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 281 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 282
 283 const bfd_target irix_core_vec =
 284   {
 285     "irix-core",
 286     bfd_target_unknown_flavour,
 287     BFD_ENDIAN_BIG,             /* target byte order */
 288     BFD_ENDIAN_BIG,             /* target headers byte order */
 289     (HAS_RELOC | EXEC_P |       /* object flags */
 290      HAS_LINENO | HAS_DEBUG |
 291      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 292     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 293     0,                                                     /* symbol prefix */
 294     ' ',                                                   /* ar_pad_char */
 295     16,                                                    /* ar_max_namelen */
 296     0,                                                     /* match_priority */
 297     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
 298     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
 299     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
 300     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
 301     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
 302     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
 303
 304     {                           /* bfd_check_format */
 305       _bfd_dummy_target,                /* unknown format */
 306       _bfd_dummy_target,                /* object file */
 307       _bfd_dummy_target,                /* archive */
 308       irix_core_core_file_p             /* a core file */
 309     },
 310     {                           /* bfd_set_format */
 311       bfd_false, bfd_false,
 312       bfd_false, bfd_false
 313     },
 314     {                           /* bfd_write_contents */
 315       bfd_false, bfd_false,
 316       bfd_false, bfd_false
 317     },
 318
 319     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 320     BFD_JUMP_TABLE_COPY (_bfd_generic),
 321     BFD_JUMP_TABLE_CORE (irix_core),
 322     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 323     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 324     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 325     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 326     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 327     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 328
 329     NULL,
 330
 331     NULL                        /* backend_data */
 332   };
 333
 334 #endif /* IRIX_CORE */