bfd/irix-core.c

   1 /* BFD back-end for Irix core files.
   2    Copyright 1993, 1994, 1996, 1999, 2001, 2002, 2004, 2006, 2007
   3    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 2 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, MA 02110-1301, USA.  */
  22
  23 /* This file can only be compiled on systems which use Irix style core
  24    files (namely, Irix 4 and Irix 5, so far).  */
  25
  26 #include "sysdep.h"
  27 #include "bfd.h"
  28 #include "libbfd.h"
  29
  30 #ifdef IRIX_CORE
  31
  32 #include <core.out.h>
  33
  34 struct sgi_core_struct
  35 {
  36   int sig;
  37   char cmd[CORE_NAMESIZE];
  38 };
  39
  40 #define core_hdr(bfd) ((bfd)->tdata.sgi_core_data)
  41 #define core_signal(bfd) (core_hdr(bfd)->sig)
  42 #define core_command(bfd) (core_hdr(bfd)->cmd)
  43
  44 #define irix_core_core_file_matches_executable_p generic_core_file_matches_executable_p
  45
  46 static asection *make_bfd_asection
  47   (bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr);
  48
  49 /* Helper function for irix_core_core_file_p:
  50    32-bit and 64-bit versions.  */
  51
  52 #ifdef CORE_MAGIC64
  53 static int
  54 do_sections64 (bfd *abfd, struct coreout *coreout)
  55 {
  56   struct vmap64 vmap;
  57   char *secname;
  58   int i, val;
  59
  60   for (i = 0; i < coreout->c_nvmap; i++)
  61     {
  62       val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
  63       if (val != sizeof vmap)
  64         break;
  65
  66       switch (vmap.v_type)
  67         {
  68         case VDATA:
  69           secname = ".data";
  70           break;
  71         case VSTACK:
  72           secname = ".stack";
  73           break;
  74 #ifdef VMAPFILE
  75         case VMAPFILE:
  76           secname = ".mapfile";
  77           break;
  78 #endif
  79         default:
  80           continue;
  81         }
  82
  83       /* A file offset of zero means that the
  84          section is not contained in the corefile.  */
  85       if (vmap.v_offset == 0)
  86         continue;
  87
  88       if (!make_bfd_asection (abfd, secname,
  89                               SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
  90                               vmap.v_len, vmap.v_vaddr, vmap.v_offset))
  91         /* Fail.  */
  92         return 0;
  93     }
  94
  95   return 1;
  96 }
  97 #endif
  98
  99 /* 32-bit version.  */
 100
 101 static int
 102 do_sections (bfd *abfd, struct coreout *coreout)
 103 {
 104   struct vmap vmap;
 105   char *secname;
 106   int i, val;
 107
 108   for (i = 0; i < coreout->c_nvmap; i++)
 109     {
 110       val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
 111       if (val != sizeof vmap)
 112         break;
 113
 114       switch (vmap.v_type)
 115         {
 116         case VDATA:
 117           secname = ".data";
 118           break;
 119         case VSTACK:
 120           secname = ".stack";
 121           break;
 122 #ifdef VMAPFILE
 123         case VMAPFILE:
 124           secname = ".mapfile";
 125           break;
 126 #endif
 127         default:
 128           continue;
 129         }
 130
 131       /* A file offset of zero means that the
 132          section is not contained in the corefile.  */
 133       if (vmap.v_offset == 0)
 134         continue;
 135
 136       if (!make_bfd_asection (abfd, secname,
 137                               SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
 138                               vmap.v_len, vmap.v_vaddr, vmap.v_offset))
 139         /* Fail.  */
 140         return 0;
 141     }
 142   return 1;
 143 }
 144
 145 static asection *
 146 make_bfd_asection (bfd *abfd,
 147                    const char *name,
 148                    flagword flags,
 149                    bfd_size_type size,
 150                    bfd_vma vma,
 151                    file_ptr filepos)
 152 {
 153   asection *asect;
 154
 155   asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
 156   if (!asect)
 157     return NULL;
 158
 159   asect->size = size;
 160   asect->vma = vma;
 161   asect->filepos = filepos;
 162   asect->alignment_power = 4;
 163
 164   return asect;
 165 }
 166
 167 static const bfd_target *
 168 irix_core_core_file_p (bfd *abfd)
 169 {
 170   int val;
 171   struct coreout coreout;
 172   struct idesc *idg, *idf, *ids;
 173   bfd_size_type amt;
 174
 175   val = bfd_bread ((PTR) &coreout, (bfd_size_type) sizeof coreout, abfd);
 176   if (val != sizeof coreout)
 177     {
 178       if (bfd_get_error () != bfd_error_system_call)
 179         bfd_set_error (bfd_error_wrong_format);
 180       return 0;
 181     }
 182
 183   if (coreout.c_version != CORE_VERSION1)
 184     return 0;
 185
 186   /* Have we got a corefile?  */
 187   switch (coreout.c_magic)
 188     {
 189     case CORE_MAGIC:    break;
 190 #ifdef CORE_MAGIC64
 191     case CORE_MAGIC64:  break;
 192 #endif
 193 #ifdef CORE_MAGICN32
 194     case CORE_MAGICN32: break;
 195 #endif
 196     default:            return 0;       /* Un-identifiable or not corefile.  */
 197     }
 198
 199   amt = sizeof (struct sgi_core_struct);
 200   core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, amt);
 201   if (!core_hdr (abfd))
 202     return NULL;
 203
 204   strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);
 205   core_signal (abfd) = coreout.c_sigcause;
 206
 207   if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)
 208     goto fail;
 209
 210   /* Process corefile sections.  */
 211 #ifdef CORE_MAGIC64
 212   if (coreout.c_magic == (int) CORE_MAGIC64)
 213     {
 214       if (! do_sections64 (abfd, & coreout))
 215         goto fail;
 216     }
 217   else
 218 #endif
 219     if (! do_sections (abfd, & coreout))
 220       goto fail;
 221
 222   /* Make sure that the regs are contiguous within the core file.  */
 223
 224   idg = &coreout.c_idesc[I_GPREGS];
 225   idf = &coreout.c_idesc[I_FPREGS];
 226   ids = &coreout.c_idesc[I_SPECREGS];
 227
 228   if (idg->i_offset + idg->i_len != idf->i_offset
 229       || idf->i_offset + idf->i_len != ids->i_offset)
 230     goto fail;                  /* Can't deal with non-contig regs */
 231
 232   if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)
 233     goto fail;
 234
 235   if (!make_bfd_asection (abfd, ".reg",
 236                           SEC_HAS_CONTENTS,
 237                           idg->i_len + idf->i_len + ids->i_len,
 238                           0,
 239                           idg->i_offset))
 240     goto fail;
 241
 242   /* OK, we believe you.  You're a core file (sure, sure).  */
 243   bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);
 244
 245   return abfd->xvec;
 246
 247  fail:
 248   bfd_release (abfd, core_hdr (abfd));
 249   core_hdr (abfd) = NULL;
 250   bfd_section_list_clear (abfd);
 251   return NULL;
 252 }
 253
 254 static char *
 255 irix_core_core_file_failing_command (bfd *abfd)
 256 {
 257   return core_command (abfd);
 258 }
 259
 260 static int
 261 irix_core_core_file_failing_signal (bfd *abfd)
 262 {
 263   return core_signal (abfd);
 264 }
 265
 266 /* If somebody calls any byte-swapping routines, shoot them.  */
 267 static void
 268 swap_abort(void)
 269 {
 270   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 271 }
 272
 273 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 274 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 275 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 276 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 277 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 278 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 279
 280 const bfd_target irix_core_vec =
 281   {
 282     "irix-core",
 283     bfd_target_unknown_flavour,
 284     BFD_ENDIAN_BIG,             /* target byte order */
 285     BFD_ENDIAN_BIG,             /* target headers byte order */
 286     (HAS_RELOC | EXEC_P |       /* object flags */
 287      HAS_LINENO | HAS_DEBUG |
 288      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 289     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 290     0,                                                     /* symbol prefix */
 291     ' ',                                                   /* ar_pad_char */
 292     16,                                                    /* ar_max_namelen */
 293     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
 294     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
 295     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
 296     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
 297     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
 298     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
 299
 300     {                           /* bfd_check_format */
 301       _bfd_dummy_target,                /* unknown format */
 302       _bfd_dummy_target,                /* object file */
 303       _bfd_dummy_target,                /* archive */
 304       irix_core_core_file_p             /* a core file */
 305     },
 306     {                           /* bfd_set_format */
 307       bfd_false, bfd_false,
 308       bfd_false, bfd_false
 309     },
 310     {                           /* bfd_write_contents */
 311       bfd_false, bfd_false,
 312       bfd_false, bfd_false
 313     },
 314
 315     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 316     BFD_JUMP_TABLE_COPY (_bfd_generic),
 317     BFD_JUMP_TABLE_CORE (irix_core),
 318     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 319     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 320     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 321     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 322     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 323     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 324
 325     NULL,
 326
 327     (PTR) 0                     /* backend_data */
 328   };
 329
 330 #endif /* IRIX_CORE */