bfd/irix-core.c

   1 /* BFD back-end for Irix core files.
   2    Copyright 1993, 1994, 1996, 1999, 2001, 2002
   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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   PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr));
  46 static const bfd_target *irix_core_core_file_p PARAMS ((bfd *));
  47 static char *irix_core_core_file_failing_command PARAMS ((bfd *));
  48 static int irix_core_core_file_failing_signal PARAMS ((bfd *));
  49 static boolean irix_core_core_file_matches_executable_p
  50   PARAMS ((bfd *, bfd *));
  51 static void swap_abort PARAMS ((void));
  52
  53 static asection *
  54 make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos)
  55      bfd *abfd;
  56      const char *name;
  57      flagword flags;
  58      bfd_size_type _raw_size;
  59      bfd_vma vma;
  60      file_ptr filepos;
  61 {
  62   asection *asect;
  63
  64   asect = bfd_make_section_anyway (abfd, name);
  65   if (!asect)
  66     return NULL;
  67
  68   asect->flags = flags;
  69   asect->_raw_size = _raw_size;
  70   asect->vma = vma;
  71   asect->filepos = filepos;
  72   asect->alignment_power = 4;
  73
  74   return asect;
  75 }
  76
  77 static const bfd_target *
  78 irix_core_core_file_p (abfd)
  79      bfd *abfd;
  80 {
  81   int val;
  82   int i;
  83   char *secname;
  84   struct coreout coreout;
  85   struct idesc *idg, *idf, *ids;
  86   bfd_size_type amt;
  87
  88   val = bfd_bread ((PTR) &coreout, (bfd_size_type) sizeof coreout, abfd);
  89   if (val != sizeof coreout)
  90     {
  91       if (bfd_get_error () != bfd_error_system_call)
  92         bfd_set_error (bfd_error_wrong_format);
  93       return 0;
  94     }
  95
  96 #ifndef CORE_MAGICN32
  97 #define CORE_MAGICN32 CORE_MAGIC
  98 #endif
  99   if ((coreout.c_magic != CORE_MAGIC && coreout.c_magic != CORE_MAGICN32)
 100       || coreout.c_version != CORE_VERSION1)
 101     return 0;
 102
 103   amt = sizeof (struct sgi_core_struct);
 104   core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, amt);
 105   if (!core_hdr (abfd))
 106     return NULL;
 107
 108   strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);
 109   core_signal (abfd) = coreout.c_sigcause;
 110
 111   if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)
 112     goto fail;
 113
 114   for (i = 0; i < coreout.c_nvmap; i++)
 115     {
 116       struct vmap vmap;
 117
 118       val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
 119       if (val != sizeof vmap)
 120         break;
 121
 122       switch (vmap.v_type)
 123         {
 124         case VDATA:
 125           secname = ".data";
 126           break;
 127         case VSTACK:
 128           secname = ".stack";
 129           break;
 130 #ifdef VMAPFILE
 131         case VMAPFILE:
 132           secname = ".mapfile";
 133           break;
 134 #endif
 135         default:
 136           continue;
 137         }
 138
 139       /* A file offset of zero means that the section is not contained
 140          in the corefile.  */
 141       if (vmap.v_offset == 0)
 142         continue;
 143
 144       if (!make_bfd_asection (abfd, secname,
 145                               SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS,
 146                               vmap.v_len,
 147                               vmap.v_vaddr,
 148                               vmap.v_offset))
 149         goto fail;
 150     }
 151
 152   /* Make sure that the regs are contiguous within the core file. */
 153
 154   idg = &coreout.c_idesc[I_GPREGS];
 155   idf = &coreout.c_idesc[I_FPREGS];
 156   ids = &coreout.c_idesc[I_SPECREGS];
 157
 158   if (idg->i_offset + idg->i_len != idf->i_offset
 159       || idf->i_offset + idf->i_len != ids->i_offset)
 160     goto fail;                  /* Can't deal with non-contig regs */
 161
 162   if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)
 163     goto fail;
 164
 165   if (!make_bfd_asection (abfd, ".reg",
 166                           SEC_HAS_CONTENTS,
 167                           idg->i_len + idf->i_len + ids->i_len,
 168                           0,
 169                           idg->i_offset))
 170     goto fail;
 171
 172   /* OK, we believe you.  You're a core file (sure, sure).  */
 173   bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);
 174
 175   return abfd->xvec;
 176
 177  fail:
 178   bfd_release (abfd, core_hdr (abfd));
 179   core_hdr (abfd) = NULL;
 180   bfd_section_list_clear (abfd);
 181   return NULL;
 182 }
 183
 184 static char *
 185 irix_core_core_file_failing_command (abfd)
 186      bfd *abfd;
 187 {
 188   return core_command (abfd);
 189 }
 190
 191 static int
 192 irix_core_core_file_failing_signal (abfd)
 193      bfd *abfd;
 194 {
 195   return core_signal (abfd);
 196 }
 197
 198 static boolean
 199 irix_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 200      bfd *core_bfd, *exec_bfd;
 201 {
 202   return true;                  /* XXX - FIXME */
 203 }
 204
 205 /* If somebody calls any byte-swapping routines, shoot them.  */
 206 static void
 207 swap_abort()
 208 {
 209   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 210 }
 211 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 212 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 213 #define NO_SIGNED_GET \
 214   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 215
 216 const bfd_target irix_core_vec =
 217   {
 218     "irix-core",
 219     bfd_target_unknown_flavour,
 220     BFD_ENDIAN_BIG,             /* target byte order */
 221     BFD_ENDIAN_BIG,             /* target headers byte order */
 222     (HAS_RELOC | EXEC_P |       /* object flags */
 223      HAS_LINENO | HAS_DEBUG |
 224      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 225     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 226     0,                                                     /* symbol prefix */
 227     ' ',                                                   /* ar_pad_char */
 228     16,                                                    /* ar_max_namelen */
 229     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 230     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 231     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 232     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 233     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 234     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 235
 236     {                           /* bfd_check_format */
 237      _bfd_dummy_target,         /* unknown format */
 238      _bfd_dummy_target,         /* object file */
 239      _bfd_dummy_target,         /* archive */
 240      irix_core_core_file_p      /* a core file */
 241     },
 242     {                           /* bfd_set_format */
 243      bfd_false, bfd_false,
 244      bfd_false, bfd_false
 245     },
 246     {                           /* bfd_write_contents */
 247      bfd_false, bfd_false,
 248      bfd_false, bfd_false
 249     },
 250
 251     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 252     BFD_JUMP_TABLE_COPY (_bfd_generic),
 253     BFD_JUMP_TABLE_CORE (irix_core),
 254     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 255     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 256     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 257     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 258     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 259     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 260
 261     NULL,
 262
 263     (PTR) 0                     /* backend_data */
 264 };
 265
 266 #endif /* IRIX_CORE */