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 #ifdef CORE_MAGIC64
  53 static int do_sections64 PARAMS ((bfd *, struct coreout *));
  54 #endif
  55 static int do_sections PARAMS ((bfd *, struct coreout *));
  56
  57 /* Helper function for irix_core_core_file_p:
  58    32-bit and 64-bit versions.  */
  59
  60 #ifdef CORE_MAGIC64
  61 static int
  62 do_sections64 (abfd, coreout)
  63      bfd * abfd;
  64      struct coreout * coreout;
  65 {
  66   struct vmap64 vmap;
  67   char *secname;
  68   int i, val;
  69
  70   for (i = 0; i < coreout->c_nvmap; i++)
  71     {
  72       val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
  73       if (val != sizeof vmap)
  74         break;
  75
  76       switch (vmap.v_type)
  77         {
  78         case VDATA:
  79           secname = ".data";
  80           break;
  81         case VSTACK:
  82           secname = ".stack";
  83           break;
  84 #ifdef VMAPFILE
  85         case VMAPFILE:
  86           secname = ".mapfile";
  87           break;
  88 #endif
  89         default:
  90           continue;
  91         }
  92
  93       /* A file offset of zero means that the
  94          section is not contained in the corefile.  */
  95       if (vmap.v_offset == 0)
  96         continue;
  97
  98       if (!make_bfd_asection (abfd, secname,
  99                               SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
 100                               vmap.v_len, vmap.v_vaddr, vmap.v_offset))
 101         /* Fail.  */
 102         return 0;
 103     }
 104
 105   return 1;
 106 }
 107 #endif
 108
 109 /* 32-bit version.  */
 110
 111 static int
 112 do_sections (abfd, coreout)
 113      bfd * abfd;
 114      struct coreout *coreout;
 115 {
 116   struct vmap vmap;
 117   char *secname;
 118   int i, val;
 119
 120   for (i = 0; i < coreout->c_nvmap; i++)
 121     {
 122       val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
 123       if (val != sizeof vmap)
 124         break;
 125
 126       switch (vmap.v_type)
 127         {
 128         case VDATA:
 129           secname = ".data";
 130           break;
 131         case VSTACK:
 132           secname = ".stack";
 133           break;
 134 #ifdef VMAPFILE
 135         case VMAPFILE:
 136           secname = ".mapfile";
 137           break;
 138 #endif
 139         default:
 140           continue;
 141         }
 142
 143       /* A file offset of zero means that the
 144          section is not contained in the corefile.  */
 145       if (vmap.v_offset == 0)
 146         continue;
 147
 148       if (!make_bfd_asection (abfd, secname,
 149                               SEC_ALLOC | SEC_LOAD+SEC_HAS_CONTENTS,
 150                               vmap.v_len, vmap.v_vaddr, vmap.v_offset))
 151         /* Fail.  */
 152         return 0;
 153     }
 154   return 1;
 155 }
 156
 157 static asection *
 158 make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos)
 159      bfd *abfd;
 160      const char *name;
 161      flagword flags;
 162      bfd_size_type _raw_size;
 163      bfd_vma vma;
 164      file_ptr filepos;
 165 {
 166   asection *asect;
 167
 168   asect = bfd_make_section_anyway (abfd, name);
 169   if (!asect)
 170     return NULL;
 171
 172   asect->flags = flags;
 173   asect->_raw_size = _raw_size;
 174   asect->vma = vma;
 175   asect->filepos = filepos;
 176   asect->alignment_power = 4;
 177
 178   return asect;
 179 }
 180
 181 static const bfd_target *
 182 irix_core_core_file_p (abfd)
 183      bfd *abfd;
 184 {
 185   int val;
 186   struct coreout coreout;
 187   struct idesc *idg, *idf, *ids;
 188   bfd_size_type amt;
 189
 190   val = bfd_bread ((PTR) &coreout, (bfd_size_type) sizeof coreout, abfd);
 191   if (val != sizeof coreout)
 192     {
 193       if (bfd_get_error () != bfd_error_system_call)
 194         bfd_set_error (bfd_error_wrong_format);
 195       return 0;
 196     }
 197
 198   if (coreout.c_version != CORE_VERSION1)
 199     return 0;
 200
 201   /* Have we got a corefile?  */
 202   switch (coreout.c_magic)
 203     {
 204     case CORE_MAGIC:    break;
 205 #ifdef CORE_MAGIC64
 206     case CORE_MAGIC64:  break;
 207 #endif
 208 #ifdef CORE_MAGICN32
 209     case CORE_MAGICN32: break;
 210 #endif
 211     default:            return 0;       /* Un-identifiable or not corefile.  */
 212     }
 213
 214   amt = sizeof (struct sgi_core_struct);
 215   core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, amt);
 216   if (!core_hdr (abfd))
 217     return NULL;
 218
 219   strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);
 220   core_signal (abfd) = coreout.c_sigcause;
 221
 222   if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)
 223     goto fail;
 224
 225   /* Process corefile sections.  */
 226 #ifdef CORE_MAGIC64
 227   if (coreout.c_magic == (int) CORE_MAGIC64)
 228     {
 229       if (! do_sections64 (abfd, & coreout))
 230         goto fail;
 231     }
 232   else
 233 #endif
 234     if (! do_sections (abfd, & coreout))
 235       goto fail;
 236
 237   /* Make sure that the regs are contiguous within the core file.  */
 238
 239   idg = &coreout.c_idesc[I_GPREGS];
 240   idf = &coreout.c_idesc[I_FPREGS];
 241   ids = &coreout.c_idesc[I_SPECREGS];
 242
 243   if (idg->i_offset + idg->i_len != idf->i_offset
 244       || idf->i_offset + idf->i_len != ids->i_offset)
 245     goto fail;                  /* Can't deal with non-contig regs */
 246
 247   if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)
 248     goto fail;
 249
 250   if (!make_bfd_asection (abfd, ".reg",
 251                           SEC_HAS_CONTENTS,
 252                           idg->i_len + idf->i_len + ids->i_len,
 253                           0,
 254                           idg->i_offset))
 255     goto fail;
 256
 257   /* OK, we believe you.  You're a core file (sure, sure).  */
 258   bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);
 259
 260   return abfd->xvec;
 261
 262  fail:
 263   bfd_release (abfd, core_hdr (abfd));
 264   core_hdr (abfd) = NULL;
 265   bfd_section_list_clear (abfd);
 266   return NULL;
 267 }
 268
 269 static char *
 270 irix_core_core_file_failing_command (abfd)
 271      bfd *abfd;
 272 {
 273   return core_command (abfd);
 274 }
 275
 276 static int
 277 irix_core_core_file_failing_signal (abfd)
 278      bfd *abfd;
 279 {
 280   return core_signal (abfd);
 281 }
 282
 283 static boolean
 284 irix_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 285      bfd *core_bfd, *exec_bfd;
 286 {
 287   return true;                  /* XXX - FIXME */
 288 }
 289
 290 /* If somebody calls any byte-swapping routines, shoot them.  */
 291 static void
 292 swap_abort()
 293 {
 294   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 295 }
 296 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 297 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 298 #define NO_SIGNED_GET \
 299   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 300
 301 const bfd_target irix_core_vec =
 302   {
 303     "irix-core",
 304     bfd_target_unknown_flavour,
 305     BFD_ENDIAN_BIG,             /* target byte order */
 306     BFD_ENDIAN_BIG,             /* target headers byte order */
 307     (HAS_RELOC | EXEC_P |       /* object flags */
 308      HAS_LINENO | HAS_DEBUG |
 309      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 310     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 311     0,                                                     /* symbol prefix */
 312     ' ',                                                   /* ar_pad_char */
 313     16,                                                    /* ar_max_namelen */
 314     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 315     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 316     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 317     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 318     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 319     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 320
 321     {                           /* bfd_check_format */
 322      _bfd_dummy_target,         /* unknown format */
 323      _bfd_dummy_target,         /* object file */
 324      _bfd_dummy_target,         /* archive */
 325      irix_core_core_file_p      /* a core file */
 326     },
 327     {                           /* bfd_set_format */
 328      bfd_false, bfd_false,
 329      bfd_false, bfd_false
 330     },
 331     {                           /* bfd_write_contents */
 332      bfd_false, bfd_false,
 333      bfd_false, bfd_false
 334     },
 335
 336     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 337     BFD_JUMP_TABLE_COPY (_bfd_generic),
 338     BFD_JUMP_TABLE_CORE (irix_core),
 339     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 340     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 341     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 342     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 343     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 344     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 345
 346     NULL,
 347
 348     (PTR) 0                     /* backend_data */
 349 };
 350
 351 #endif /* IRIX_CORE */