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