bfd/osf-core.c

   1 /* BFD back-end for OSF/1 core files.
   2    Copyright 1993, 1994, 1995, 1998, 1999, 2001, 2002
   3    Free Software Foundation, Inc.
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 /* This file can only be compiled on systems which use OSF/1 style
  22    core files.  */
  23
  24 #include "bfd.h"
  25 #include "sysdep.h"
  26 #include "libbfd.h"
  27
  28 #include <sys/user.h>
  29 #include <sys/core.h>
  30
  31 /* forward declarations */
  32
  33 static asection *make_bfd_asection
  34   PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr));
  35 static const bfd_target *osf_core_core_file_p PARAMS ((bfd *));
  36 static char *osf_core_core_file_failing_command PARAMS ((bfd *));
  37 static int osf_core_core_file_failing_signal PARAMS ((bfd *));
  38 static boolean osf_core_core_file_matches_executable_p PARAMS ((bfd *, bfd *));
  39 static void swap_abort PARAMS ((void));
  40
  41 /* These are stored in the bfd's tdata */
  42
  43 struct osf_core_struct
  44 {
  45   int sig;
  46   char cmd[MAXCOMLEN + 1];
  47 };
  48
  49 #define core_hdr(bfd) ((bfd)->tdata.osf_core_data)
  50 #define core_signal(bfd) (core_hdr(bfd)->sig)
  51 #define core_command(bfd) (core_hdr(bfd)->cmd)
  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 = 8;
  73
  74   return asect;
  75 }
  76
  77 static const bfd_target *
  78 osf_core_core_file_p (abfd)
  79      bfd *abfd;
  80 {
  81   int val;
  82   int i;
  83   char *secname;
  84   struct core_filehdr core_header;
  85   bfd_size_type amt;
  86
  87   amt = sizeof core_header;
  88   val = bfd_bread ((PTR) &core_header, amt, abfd);
  89   if (val != sizeof core_header)
  90     return NULL;
  91
  92   if (strncmp (core_header.magic, "Core", 4) != 0)
  93     return NULL;
  94
  95   core_hdr (abfd) = (struct osf_core_struct *)
  96     bfd_zalloc (abfd, (bfd_size_type) sizeof (struct osf_core_struct));
  97   if (!core_hdr (abfd))
  98     return NULL;
  99
 100   strncpy (core_command (abfd), core_header.name, MAXCOMLEN + 1);
 101   core_signal (abfd) = core_header.signo;
 102
 103   for (i = 0; i < core_header.nscns; i++)
 104     {
 105       struct core_scnhdr core_scnhdr;
 106       flagword flags;
 107
 108       amt = sizeof core_scnhdr;
 109       val = bfd_bread ((PTR) &core_scnhdr, amt, abfd);
 110       if (val != sizeof core_scnhdr)
 111         break;
 112
 113       /* Skip empty sections.  */
 114       if (core_scnhdr.size == 0 || core_scnhdr.scnptr == 0)
 115         continue;
 116
 117       switch (core_scnhdr.scntype)
 118         {
 119         case SCNRGN:
 120           secname = ".data";
 121           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 122           break;
 123         case SCNSTACK:
 124           secname = ".stack";
 125           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 126           break;
 127         case SCNREGS:
 128           secname = ".reg";
 129           flags = SEC_HAS_CONTENTS;
 130           break;
 131         default:
 132           (*_bfd_error_handler) (_("Unhandled OSF/1 core file section type %d\n"),
 133                                  core_scnhdr.scntype);
 134           continue;
 135         }
 136
 137       if (!make_bfd_asection (abfd, secname, flags,
 138                               (bfd_size_type) core_scnhdr.size,
 139                               (bfd_vma) core_scnhdr.vaddr,
 140                               (file_ptr) core_scnhdr.scnptr))
 141         goto fail;
 142     }
 143
 144   /* OK, we believe you.  You're a core file (sure, sure).  */
 145
 146   return abfd->xvec;
 147
 148  fail:
 149   bfd_release (abfd, core_hdr (abfd));
 150   core_hdr (abfd) = NULL;
 151   bfd_section_list_clear (abfd);
 152   return NULL;
 153 }
 154
 155 static char *
 156 osf_core_core_file_failing_command (abfd)
 157      bfd *abfd;
 158 {
 159   return core_command (abfd);
 160 }
 161
 162 /* ARGSUSED */
 163 static int
 164 osf_core_core_file_failing_signal (abfd)
 165      bfd *abfd;
 166 {
 167   return core_signal (abfd);
 168 }
 169
 170 /* ARGSUSED */
 171 static boolean
 172 osf_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 173      bfd *core_bfd ATTRIBUTE_UNUSED;
 174      bfd *exec_bfd ATTRIBUTE_UNUSED;
 175 {
 176   return true;          /* FIXME, We have no way of telling at this point */
 177 }
 178 \f
 179 /* If somebody calls any byte-swapping routines, shoot them.  */
 180 static void
 181 swap_abort()
 182 {
 183   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 184 }
 185 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 186 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 187 #define NO_SIGNED_GET \
 188   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 189
 190 const bfd_target osf_core_vec =
 191   {
 192     "osf-core",
 193     bfd_target_unknown_flavour,
 194     BFD_ENDIAN_LITTLE,          /* target byte order */
 195     BFD_ENDIAN_LITTLE,          /* target headers byte order */
 196     (HAS_RELOC | EXEC_P |       /* object flags */
 197      HAS_LINENO | HAS_DEBUG |
 198      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 199     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 200     0,                                                     /* symbol prefix */
 201     ' ',                                                   /* ar_pad_char */
 202     16,                                                    /* ar_max_namelen */
 203     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 204     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 205     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 206     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 207     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 208     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 209
 210     {                           /* bfd_check_format */
 211      _bfd_dummy_target,         /* unknown format */
 212      _bfd_dummy_target,         /* object file */
 213      _bfd_dummy_target,         /* archive */
 214      osf_core_core_file_p       /* a core file */
 215     },
 216     {                           /* bfd_set_format */
 217      bfd_false, bfd_false,
 218      bfd_false, bfd_false
 219     },
 220     {                           /* bfd_write_contents */
 221      bfd_false, bfd_false,
 222      bfd_false, bfd_false
 223     },
 224
 225     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 226     BFD_JUMP_TABLE_COPY (_bfd_generic),
 227     BFD_JUMP_TABLE_CORE (osf_core),
 228     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 229     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 230     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 231     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 232     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 233     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 234
 235     NULL,
 236
 237     (PTR) 0                     /* backend_data */
 238 };