bfd/irix-core.c

   1 /* BFD back-end for Irix core files.
   2    Copyright 1993, 1994, 1996, 1999, 2001 Free Software Foundation, Inc.
   3    Written by Stu Grossman, Cygnus Support.
   4    Converted to back-end form by Ian Lance Taylor, Cygnus Support
   5
   6 This file is part of BFD, the Binary File Descriptor library.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  21
  22 /* This file can only be compiled on systems which use Irix style core
  23    files (namely, Irix 4 and Irix 5, so far).  */
  24
  25 #include "bfd.h"
  26 #include "sysdep.h"
  27 #include "libbfd.h"
  28
  29 #ifdef IRIX_CORE
  30
  31 #include <core.out.h>
  32
  33 struct sgi_core_struct
  34 {
  35   int sig;
  36   char cmd[CORE_NAMESIZE];
  37 };
  38
  39 #define core_hdr(bfd) ((bfd)->tdata.sgi_core_data)
  40 #define core_signal(bfd) (core_hdr(bfd)->sig)
  41 #define core_command(bfd) (core_hdr(bfd)->cmd)
  42
  43 static asection *make_bfd_asection
  44   PARAMS ((bfd *, CONST char *, flagword, bfd_size_type, bfd_vma, file_ptr));
  45 static const bfd_target *irix_core_core_file_p PARAMS ((bfd *));
  46 static char *irix_core_core_file_failing_command PARAMS ((bfd *));
  47 static int irix_core_core_file_failing_signal PARAMS ((bfd *));
  48 static boolean irix_core_core_file_matches_executable_p
  49   PARAMS ((bfd *, bfd *));
  50 static asymbol *irix_core_make_empty_symbol PARAMS ((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
  87   val = bfd_read ((PTR)&coreout, 1, sizeof coreout, abfd);
  88   if (val != sizeof coreout)
  89     {
  90       if (bfd_get_error () != bfd_error_system_call)
  91         bfd_set_error (bfd_error_wrong_format);
  92       return 0;
  93     }
  94
  95 #ifndef CORE_MAGICN32
  96 #define CORE_MAGICN32 CORE_MAGIC
  97 #endif
  98   if ((coreout.c_magic != CORE_MAGIC && coreout.c_magic != CORE_MAGICN32)
  99       || coreout.c_version != CORE_VERSION1)
 100     return 0;
 101
 102   core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, sizeof (struct sgi_core_struct));
 103   if (!core_hdr (abfd))
 104     return NULL;
 105
 106   strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);
 107   core_signal (abfd) = coreout.c_sigcause;
 108
 109   if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)
 110     return NULL;
 111
 112   for (i = 0; i < coreout.c_nvmap; i++)
 113     {
 114       struct vmap vmap;
 115
 116       val = bfd_read ((PTR)&vmap, 1, sizeof vmap, abfd);
 117       if (val != sizeof vmap)
 118         break;
 119
 120       switch (vmap.v_type)
 121         {
 122         case VDATA:
 123           secname = ".data";
 124           break;
 125         case VSTACK:
 126           secname = ".stack";
 127           break;
 128 #ifdef VMAPFILE
 129         case VMAPFILE:
 130           secname = ".mapfile";
 131           break;
 132 #endif
 133         default:
 134           continue;
 135         }
 136
 137       /* A file offset of zero means that the section is not contained
 138          in the corefile.  */
 139       if (vmap.v_offset == 0)
 140         continue;
 141
 142       if (!make_bfd_asection (abfd, secname,
 143                               SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS,
 144                               vmap.v_len,
 145                               vmap.v_vaddr,
 146                               vmap.v_offset))
 147         return NULL;
 148     }
 149
 150   /* Make sure that the regs are contiguous within the core file. */
 151
 152   idg = &coreout.c_idesc[I_GPREGS];
 153   idf = &coreout.c_idesc[I_FPREGS];
 154   ids = &coreout.c_idesc[I_SPECREGS];
 155
 156   if (idg->i_offset + idg->i_len != idf->i_offset
 157       || idf->i_offset + idf->i_len != ids->i_offset)
 158     return 0;                   /* Can't deal with non-contig regs */
 159
 160   if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)
 161     return NULL;
 162
 163   make_bfd_asection (abfd, ".reg",
 164                      SEC_HAS_CONTENTS,
 165                      idg->i_len + idf->i_len + ids->i_len,
 166                      0,
 167                      idg->i_offset);
 168
 169   /* OK, we believe you.  You're a core file (sure, sure).  */
 170   bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);
 171
 172   return abfd->xvec;
 173 }
 174
 175 static char *
 176 irix_core_core_file_failing_command (abfd)
 177      bfd *abfd;
 178 {
 179   return core_command (abfd);
 180 }
 181
 182 static int
 183 irix_core_core_file_failing_signal (abfd)
 184      bfd *abfd;
 185 {
 186   return core_signal (abfd);
 187 }
 188
 189 static boolean
 190 irix_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 191      bfd *core_bfd, *exec_bfd;
 192 {
 193   return true;                  /* XXX - FIXME */
 194 }
 195
 196 static asymbol *
 197 irix_core_make_empty_symbol (abfd)
 198      bfd *abfd;
 199 {
 200   asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));
 201   if (new)
 202     new->the_bfd = abfd;
 203   return new;
 204 }
 205
 206 #define irix_core_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound
 207 #define irix_core_get_symtab _bfd_nosymbols_get_symtab
 208 #define irix_core_print_symbol _bfd_nosymbols_print_symbol
 209 #define irix_core_get_symbol_info _bfd_nosymbols_get_symbol_info
 210 #define irix_core_bfd_is_local_label_name \
 211   _bfd_nosymbols_bfd_is_local_label_name
 212 #define irix_core_get_lineno _bfd_nosymbols_get_lineno
 213 #define irix_core_find_nearest_line _bfd_nosymbols_find_nearest_line
 214 #define irix_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
 215 #define irix_core_read_minisymbols _bfd_nosymbols_read_minisymbols
 216 #define irix_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol
 217
 218 /* If somebody calls any byte-swapping routines, shoot them.  */
 219 static void
 220 swap_abort()
 221 {
 222   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 223 }
 224 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 225 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 226 #define NO_SIGNED_GET \
 227   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 228
 229 const bfd_target irix_core_vec =
 230   {
 231     "irix-core",
 232     bfd_target_unknown_flavour,
 233     BFD_ENDIAN_BIG,             /* target byte order */
 234     BFD_ENDIAN_BIG,             /* target headers byte order */
 235     (HAS_RELOC | EXEC_P |       /* object flags */
 236      HAS_LINENO | HAS_DEBUG |
 237      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 238     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 239     0,                                                     /* symbol prefix */
 240     ' ',                                                   /* ar_pad_char */
 241     16,                                                    /* ar_max_namelen */
 242     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 243     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 244     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 245     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 246     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 247     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 248
 249     {                           /* bfd_check_format */
 250      _bfd_dummy_target,         /* unknown format */
 251      _bfd_dummy_target,         /* object file */
 252      _bfd_dummy_target,         /* archive */
 253      irix_core_core_file_p      /* a core file */
 254     },
 255     {                           /* bfd_set_format */
 256      bfd_false, bfd_false,
 257      bfd_false, bfd_false
 258     },
 259     {                           /* bfd_write_contents */
 260      bfd_false, bfd_false,
 261      bfd_false, bfd_false
 262     },
 263
 264        BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 265        BFD_JUMP_TABLE_COPY (_bfd_generic),
 266        BFD_JUMP_TABLE_CORE (irix_core),
 267        BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 268        BFD_JUMP_TABLE_SYMBOLS (irix_core),
 269        BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 270        BFD_JUMP_TABLE_WRITE (_bfd_generic),
 271        BFD_JUMP_TABLE_LINK (_bfd_nolink),
 272        BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 273
 274     NULL,
 275
 276     (PTR) 0                     /* backend_data */
 277 };
 278
 279 #endif /* IRIX_CORE */