bfd/irix-core.c

   1 /* BFD back-end for Irix core files.
   2    Copyright 1993, 1994, 1996, 1999, 2001, 2002, 2004
   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 "bfd.h"
  27 #include "sysdep.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 static asection *make_bfd_asection
  45   (bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr);
  46
  47 /* Helper function for irix_core_core_file_p:
  48    32-bit and 64-bit versions.  */
  49
  50 #ifdef CORE_MAGIC64
  51 static int
  52 do_sections64 (bfd *abfd, struct coreout *coreout)
  53 {
  54   struct vmap64 vmap;
  55   char *secname;
  56   int i, val;
  57
  58   for (i = 0; i < coreout->c_nvmap; i++)
  59     {
  60       val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
  61       if (val != sizeof vmap)
  62         break;
  63
  64       switch (vmap.v_type)
  65         {
  66         case VDATA:
  67           secname = ".data";
  68           break;
  69         case VSTACK:
  70           secname = ".stack";
  71           break;
  72 #ifdef VMAPFILE
  73         case VMAPFILE:
  74           secname = ".mapfile";
  75           break;
  76 #endif
  77         default:
  78           continue;
  79         }
  80
  81       /* A file offset of zero means that the
  82          section is not contained in the corefile.  */
  83       if (vmap.v_offset == 0)
  84         continue;
  85
  86       if (!make_bfd_asection (abfd, secname,
  87                               SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
  88                               vmap.v_len, vmap.v_vaddr, vmap.v_offset))
  89         /* Fail.  */
  90         return 0;
  91     }
  92
  93   return 1;
  94 }
  95 #endif
  96
  97 /* 32-bit version.  */
  98
  99 static int
 100 do_sections (bfd *abfd, struct coreout *coreout)
 101 {
 102   struct vmap vmap;
 103   char *secname;
 104   int i, val;
 105
 106   for (i = 0; i < coreout->c_nvmap; i++)
 107     {
 108       val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
 109       if (val != sizeof vmap)
 110         break;
 111
 112       switch (vmap.v_type)
 113         {
 114         case VDATA:
 115           secname = ".data";
 116           break;
 117         case VSTACK:
 118           secname = ".stack";
 119           break;
 120 #ifdef VMAPFILE
 121         case VMAPFILE:
 122           secname = ".mapfile";
 123           break;
 124 #endif
 125         default:
 126           continue;
 127         }
 128
 129       /* A file offset of zero means that the
 130          section is not contained in the corefile.  */
 131       if (vmap.v_offset == 0)
 132         continue;
 133
 134       if (!make_bfd_asection (abfd, secname,
 135                               SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
 136                               vmap.v_len, vmap.v_vaddr, vmap.v_offset))
 137         /* Fail.  */
 138         return 0;
 139     }
 140   return 1;
 141 }
 142
 143 static asection *
 144 make_bfd_asection (bfd *abfd,
 145                    const char *name,
 146                    flagword flags,
 147                    bfd_size_type size,
 148                    bfd_vma vma,
 149                    file_ptr filepos)
 150 {
 151   asection *asect;
 152
 153   asect = bfd_make_section_anyway (abfd, name);
 154   if (!asect)
 155     return NULL;
 156
 157   asect->flags = flags;
 158   asect->size = size;
 159   asect->vma = vma;
 160   asect->filepos = filepos;
 161   asect->alignment_power = 4;
 162
 163   return asect;
 164 }
 165
 166 static const bfd_target *
 167 irix_core_core_file_p (bfd *abfd)
 168 {
 169   int val;
 170   struct coreout coreout;
 171   struct idesc *idg, *idf, *ids;
 172   bfd_size_type amt;
 173
 174   val = bfd_bread ((PTR) &coreout, (bfd_size_type) sizeof coreout, abfd);
 175   if (val != sizeof coreout)
 176     {
 177       if (bfd_get_error () != bfd_error_system_call)
 178         bfd_set_error (bfd_error_wrong_format);
 179       return 0;
 180     }
 181
 182   if (coreout.c_version != CORE_VERSION1)
 183     return 0;
 184
 185   /* Have we got a corefile?  */
 186   switch (coreout.c_magic)
 187     {
 188     case CORE_MAGIC:    break;
 189 #ifdef CORE_MAGIC64
 190     case CORE_MAGIC64:  break;
 191 #endif
 192 #ifdef CORE_MAGICN32
 193     case CORE_MAGICN32: break;
 194 #endif
 195     default:            return 0;       /* Un-identifiable or not corefile.  */
 196     }
 197
 198   amt = sizeof (struct sgi_core_struct);
 199   core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, amt);
 200   if (!core_hdr (abfd))
 201     return NULL;
 202
 203   strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);
 204   core_signal (abfd) = coreout.c_sigcause;
 205
 206   if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)
 207     goto fail;
 208
 209   /* Process corefile sections.  */
 210 #ifdef CORE_MAGIC64
 211   if (coreout.c_magic == (int) CORE_MAGIC64)
 212     {
 213       if (! do_sections64 (abfd, & coreout))
 214         goto fail;
 215     }
 216   else
 217 #endif
 218     if (! do_sections (abfd, & coreout))
 219       goto fail;
 220
 221   /* Make sure that the regs are contiguous within the core file.  */
 222
 223   idg = &coreout.c_idesc[I_GPREGS];
 224   idf = &coreout.c_idesc[I_FPREGS];
 225   ids = &coreout.c_idesc[I_SPECREGS];
 226
 227   if (idg->i_offset + idg->i_len != idf->i_offset
 228       || idf->i_offset + idf->i_len != ids->i_offset)
 229     goto fail;                  /* Can't deal with non-contig regs */
 230
 231   if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)
 232     goto fail;
 233
 234   if (!make_bfd_asection (abfd, ".reg",
 235                           SEC_HAS_CONTENTS,
 236                           idg->i_len + idf->i_len + ids->i_len,
 237                           0,
 238                           idg->i_offset))
 239     goto fail;
 240
 241   /* OK, we believe you.  You're a core file (sure, sure).  */
 242   bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);
 243
 244   return abfd->xvec;
 245
 246  fail:
 247   bfd_release (abfd, core_hdr (abfd));
 248   core_hdr (abfd) = NULL;
 249   bfd_section_list_clear (abfd);
 250   return NULL;
 251 }
 252
 253 static char *
 254 irix_core_core_file_failing_command (bfd *abfd)
 255 {
 256   return core_command (abfd);
 257 }
 258
 259 static int
 260 irix_core_core_file_failing_signal (bfd *abfd)
 261 {
 262   return core_signal (abfd);
 263 }
 264
 265 static bfd_boolean
 266 irix_core_core_file_matches_executable_p (bfd *core_bfd ATTRIBUTE_UNUSED,
 267                                           bfd *exec_bfd ATTRIBUTE_UNUSED)
 268 {
 269   return TRUE;                  /* XXX - FIXME */
 270 }
 271
 272 /* If somebody calls any byte-swapping routines, shoot them.  */
 273 static void
 274 swap_abort(void)
 275 {
 276   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 277 }
 278
 279 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 280 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 281 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 282 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 283 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 284 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 285
 286 const bfd_target irix_core_vec =
 287   {
 288     "irix-core",
 289     bfd_target_unknown_flavour,
 290     BFD_ENDIAN_BIG,             /* target byte order */
 291     BFD_ENDIAN_BIG,             /* target headers byte order */
 292     (HAS_RELOC | EXEC_P |       /* object flags */
 293      HAS_LINENO | HAS_DEBUG |
 294      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 295     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 296     0,                                                     /* symbol prefix */
 297     ' ',                                                   /* ar_pad_char */
 298     16,                                                    /* ar_max_namelen */
 299     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
 300     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
 301     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
 302     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
 303     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
 304     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
 305
 306     {                           /* bfd_check_format */
 307       _bfd_dummy_target,                /* unknown format */
 308       _bfd_dummy_target,                /* object file */
 309       _bfd_dummy_target,                /* archive */
 310       irix_core_core_file_p             /* a core file */
 311     },
 312     {                           /* bfd_set_format */
 313       bfd_false, bfd_false,
 314       bfd_false, bfd_false
 315     },
 316     {                           /* bfd_write_contents */
 317       bfd_false, bfd_false,
 318       bfd_false, bfd_false
 319     },
 320
 321     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 322     BFD_JUMP_TABLE_COPY (_bfd_generic),
 323     BFD_JUMP_TABLE_CORE (irix_core),
 324     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 325     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 326     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 327     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 328     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 329     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 330
 331     NULL,
 332
 333     (PTR) 0                     /* backend_data */
 334   };
 335
 336 #endif /* IRIX_CORE */