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., 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
  47   PARAMS ((bfd *));
  48 static char *irix_core_core_file_failing_command
  49   PARAMS ((bfd *));
  50 static int irix_core_core_file_failing_signal
  51   PARAMS ((bfd *));
  52 static bfd_boolean irix_core_core_file_matches_executable_p
  53   PARAMS ((bfd *, bfd *));
  54 static void swap_abort
  55   PARAMS ((void));
  56 #ifdef CORE_MAGIC64
  57 static int do_sections64
  58   PARAMS ((bfd *, struct coreout *));
  59 #endif
  60 static int do_sections
  61   PARAMS ((bfd *, struct coreout *));
  62
  63 /* Helper function for irix_core_core_file_p:
  64    32-bit and 64-bit versions.  */
  65
  66 #ifdef CORE_MAGIC64
  67 static int
  68 do_sections64 (abfd, coreout)
  69      bfd * abfd;
  70      struct coreout * coreout;
  71 {
  72   struct vmap64 vmap;
  73   char *secname;
  74   int i, val;
  75
  76   for (i = 0; i < coreout->c_nvmap; i++)
  77     {
  78       val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
  79       if (val != sizeof vmap)
  80         break;
  81
  82       switch (vmap.v_type)
  83         {
  84         case VDATA:
  85           secname = ".data";
  86           break;
  87         case VSTACK:
  88           secname = ".stack";
  89           break;
  90 #ifdef VMAPFILE
  91         case VMAPFILE:
  92           secname = ".mapfile";
  93           break;
  94 #endif
  95         default:
  96           continue;
  97         }
  98
  99       /* A file offset of zero means that the
 100          section is not contained in the corefile.  */
 101       if (vmap.v_offset == 0)
 102         continue;
 103
 104       if (!make_bfd_asection (abfd, secname,
 105                               SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
 106                               vmap.v_len, vmap.v_vaddr, vmap.v_offset))
 107         /* Fail.  */
 108         return 0;
 109     }
 110
 111   return 1;
 112 }
 113 #endif
 114
 115 /* 32-bit version.  */
 116
 117 static int
 118 do_sections (abfd, coreout)
 119      bfd * abfd;
 120      struct coreout *coreout;
 121 {
 122   struct vmap vmap;
 123   char *secname;
 124   int i, val;
 125
 126   for (i = 0; i < coreout->c_nvmap; i++)
 127     {
 128       val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
 129       if (val != sizeof vmap)
 130         break;
 131
 132       switch (vmap.v_type)
 133         {
 134         case VDATA:
 135           secname = ".data";
 136           break;
 137         case VSTACK:
 138           secname = ".stack";
 139           break;
 140 #ifdef VMAPFILE
 141         case VMAPFILE:
 142           secname = ".mapfile";
 143           break;
 144 #endif
 145         default:
 146           continue;
 147         }
 148
 149       /* A file offset of zero means that the
 150          section is not contained in the corefile.  */
 151       if (vmap.v_offset == 0)
 152         continue;
 153
 154       if (!make_bfd_asection (abfd, secname,
 155                               SEC_ALLOC | SEC_LOAD+SEC_HAS_CONTENTS,
 156                               vmap.v_len, vmap.v_vaddr, vmap.v_offset))
 157         /* Fail.  */
 158         return 0;
 159     }
 160   return 1;
 161 }
 162
 163 static asection *
 164 make_bfd_asection (abfd, name, flags, size, vma, filepos)
 165      bfd *abfd;
 166      const char *name;
 167      flagword flags;
 168      bfd_size_type size;
 169      bfd_vma vma;
 170      file_ptr filepos;
 171 {
 172   asection *asect;
 173
 174   asect = bfd_make_section_anyway (abfd, name);
 175   if (!asect)
 176     return NULL;
 177
 178   asect->flags = flags;
 179   asect->size = size;
 180   asect->vma = vma;
 181   asect->filepos = filepos;
 182   asect->alignment_power = 4;
 183
 184   return asect;
 185 }
 186
 187 static const bfd_target *
 188 irix_core_core_file_p (abfd)
 189      bfd *abfd;
 190 {
 191   int val;
 192   struct coreout coreout;
 193   struct idesc *idg, *idf, *ids;
 194   bfd_size_type amt;
 195
 196   val = bfd_bread ((PTR) &coreout, (bfd_size_type) sizeof coreout, abfd);
 197   if (val != sizeof coreout)
 198     {
 199       if (bfd_get_error () != bfd_error_system_call)
 200         bfd_set_error (bfd_error_wrong_format);
 201       return 0;
 202     }
 203
 204   if (coreout.c_version != CORE_VERSION1)
 205     return 0;
 206
 207   /* Have we got a corefile?  */
 208   switch (coreout.c_magic)
 209     {
 210     case CORE_MAGIC:    break;
 211 #ifdef CORE_MAGIC64
 212     case CORE_MAGIC64:  break;
 213 #endif
 214 #ifdef CORE_MAGICN32
 215     case CORE_MAGICN32: break;
 216 #endif
 217     default:            return 0;       /* Un-identifiable or not corefile.  */
 218     }
 219
 220   amt = sizeof (struct sgi_core_struct);
 221   core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, amt);
 222   if (!core_hdr (abfd))
 223     return NULL;
 224
 225   strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);
 226   core_signal (abfd) = coreout.c_sigcause;
 227
 228   if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)
 229     goto fail;
 230
 231   /* Process corefile sections.  */
 232 #ifdef CORE_MAGIC64
 233   if (coreout.c_magic == (int) CORE_MAGIC64)
 234     {
 235       if (! do_sections64 (abfd, & coreout))
 236         goto fail;
 237     }
 238   else
 239 #endif
 240     if (! do_sections (abfd, & coreout))
 241       goto fail;
 242
 243   /* Make sure that the regs are contiguous within the core file.  */
 244
 245   idg = &coreout.c_idesc[I_GPREGS];
 246   idf = &coreout.c_idesc[I_FPREGS];
 247   ids = &coreout.c_idesc[I_SPECREGS];
 248
 249   if (idg->i_offset + idg->i_len != idf->i_offset
 250       || idf->i_offset + idf->i_len != ids->i_offset)
 251     goto fail;                  /* Can't deal with non-contig regs */
 252
 253   if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)
 254     goto fail;
 255
 256   if (!make_bfd_asection (abfd, ".reg",
 257                           SEC_HAS_CONTENTS,
 258                           idg->i_len + idf->i_len + ids->i_len,
 259                           0,
 260                           idg->i_offset))
 261     goto fail;
 262
 263   /* OK, we believe you.  You're a core file (sure, sure).  */
 264   bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);
 265
 266   return abfd->xvec;
 267
 268  fail:
 269   bfd_release (abfd, core_hdr (abfd));
 270   core_hdr (abfd) = NULL;
 271   bfd_section_list_clear (abfd);
 272   return NULL;
 273 }
 274
 275 static char *
 276 irix_core_core_file_failing_command (abfd)
 277      bfd *abfd;
 278 {
 279   return core_command (abfd);
 280 }
 281
 282 static int
 283 irix_core_core_file_failing_signal (abfd)
 284      bfd *abfd;
 285 {
 286   return core_signal (abfd);
 287 }
 288
 289 static bfd_boolean
 290 irix_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 291      bfd *core_bfd, *exec_bfd;
 292 {
 293   return TRUE;                  /* XXX - FIXME */
 294 }
 295
 296 /* If somebody calls any byte-swapping routines, shoot them.  */
 297 static void
 298 swap_abort()
 299 {
 300   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 301 }
 302
 303 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 304 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 305 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 306 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 307 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 308 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 309
 310 const bfd_target irix_core_vec =
 311   {
 312     "irix-core",
 313     bfd_target_unknown_flavour,
 314     BFD_ENDIAN_BIG,             /* target byte order */
 315     BFD_ENDIAN_BIG,             /* target headers byte order */
 316     (HAS_RELOC | EXEC_P |       /* object flags */
 317      HAS_LINENO | HAS_DEBUG |
 318      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 319     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 320     0,                                                     /* symbol prefix */
 321     ' ',                                                   /* ar_pad_char */
 322     16,                                                    /* ar_max_namelen */
 323     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
 324     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
 325     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
 326     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
 327     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
 328     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
 329
 330     {                           /* bfd_check_format */
 331       _bfd_dummy_target,                /* unknown format */
 332       _bfd_dummy_target,                /* object file */
 333       _bfd_dummy_target,                /* archive */
 334       irix_core_core_file_p             /* a core file */
 335     },
 336     {                           /* bfd_set_format */
 337       bfd_false, bfd_false,
 338       bfd_false, bfd_false
 339     },
 340     {                           /* bfd_write_contents */
 341       bfd_false, bfd_false,
 342       bfd_false, bfd_false
 343     },
 344
 345     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 346     BFD_JUMP_TABLE_COPY (_bfd_generic),
 347     BFD_JUMP_TABLE_CORE (irix_core),
 348     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 349     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 350     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 351     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 352     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 353     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 354
 355     NULL,
 356
 357     (PTR) 0                     /* backend_data */
 358   };
 359
 360 #endif /* IRIX_CORE */