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
  36   PARAMS ((bfd *));
  37 static char *osf_core_core_file_failing_command
  38   PARAMS ((bfd *));
  39 static int osf_core_core_file_failing_signal
  40   PARAMS ((bfd *));
  41 static bfd_boolean osf_core_core_file_matches_executable_p
  42   PARAMS ((bfd *, bfd *));
  43 static void swap_abort
  44   PARAMS ((void));
  45
  46 /* These are stored in the bfd's tdata */
  47
  48 struct osf_core_struct
  49 {
  50   int sig;
  51   char cmd[MAXCOMLEN + 1];
  52 };
  53
  54 #define core_hdr(bfd) ((bfd)->tdata.osf_core_data)
  55 #define core_signal(bfd) (core_hdr(bfd)->sig)
  56 #define core_command(bfd) (core_hdr(bfd)->cmd)
  57
  58 static asection *
  59 make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos)
  60      bfd *abfd;
  61      const char *name;
  62      flagword flags;
  63      bfd_size_type _raw_size;
  64      bfd_vma vma;
  65      file_ptr filepos;
  66 {
  67   asection *asect;
  68
  69   asect = bfd_make_section_anyway (abfd, name);
  70   if (!asect)
  71     return NULL;
  72
  73   asect->flags = flags;
  74   asect->_raw_size = _raw_size;
  75   asect->vma = vma;
  76   asect->filepos = filepos;
  77   asect->alignment_power = 8;
  78
  79   return asect;
  80 }
  81
  82 static const bfd_target *
  83 osf_core_core_file_p (abfd)
  84      bfd *abfd;
  85 {
  86   int val;
  87   int i;
  88   char *secname;
  89   struct core_filehdr core_header;
  90   bfd_size_type amt;
  91
  92   amt = sizeof core_header;
  93   val = bfd_bread ((PTR) &core_header, amt, abfd);
  94   if (val != sizeof core_header)
  95     return NULL;
  96
  97   if (strncmp (core_header.magic, "Core", 4) != 0)
  98     return NULL;
  99
 100   core_hdr (abfd) = (struct osf_core_struct *)
 101     bfd_zalloc (abfd, (bfd_size_type) sizeof (struct osf_core_struct));
 102   if (!core_hdr (abfd))
 103     return NULL;
 104
 105   strncpy (core_command (abfd), core_header.name, MAXCOMLEN + 1);
 106   core_signal (abfd) = core_header.signo;
 107
 108   for (i = 0; i < core_header.nscns; i++)
 109     {
 110       struct core_scnhdr core_scnhdr;
 111       flagword flags;
 112
 113       amt = sizeof core_scnhdr;
 114       val = bfd_bread ((PTR) &core_scnhdr, amt, abfd);
 115       if (val != sizeof core_scnhdr)
 116         break;
 117
 118       /* Skip empty sections.  */
 119       if (core_scnhdr.size == 0 || core_scnhdr.scnptr == 0)
 120         continue;
 121
 122       switch (core_scnhdr.scntype)
 123         {
 124         case SCNRGN:
 125           secname = ".data";
 126           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 127           break;
 128         case SCNSTACK:
 129           secname = ".stack";
 130           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 131           break;
 132         case SCNREGS:
 133           secname = ".reg";
 134           flags = SEC_HAS_CONTENTS;
 135           break;
 136         default:
 137           (*_bfd_error_handler) (_("Unhandled OSF/1 core file section type %d\n"),
 138                                  core_scnhdr.scntype);
 139           continue;
 140         }
 141
 142       if (!make_bfd_asection (abfd, secname, flags,
 143                               (bfd_size_type) core_scnhdr.size,
 144                               (bfd_vma) core_scnhdr.vaddr,
 145                               (file_ptr) core_scnhdr.scnptr))
 146         goto fail;
 147     }
 148
 149   /* OK, we believe you.  You're a core file (sure, sure).  */
 150
 151   return abfd->xvec;
 152
 153  fail:
 154   bfd_release (abfd, core_hdr (abfd));
 155   core_hdr (abfd) = NULL;
 156   bfd_section_list_clear (abfd);
 157   return NULL;
 158 }
 159
 160 static char *
 161 osf_core_core_file_failing_command (abfd)
 162      bfd *abfd;
 163 {
 164   return core_command (abfd);
 165 }
 166
 167 static int
 168 osf_core_core_file_failing_signal (abfd)
 169      bfd *abfd;
 170 {
 171   return core_signal (abfd);
 172 }
 173
 174 static bfd_boolean
 175 osf_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 176      bfd *core_bfd ATTRIBUTE_UNUSED;
 177      bfd *exec_bfd ATTRIBUTE_UNUSED;
 178 {
 179   return TRUE;          /* FIXME, We have no way of telling at this point */
 180 }
 181 \f
 182 /* If somebody calls any byte-swapping routines, shoot them.  */
 183 static void
 184 swap_abort()
 185 {
 186   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 187 }
 188 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 189 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 190 #define NO_SIGNED_GET \
 191   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 192
 193 const bfd_target osf_core_vec =
 194   {
 195     "osf-core",
 196     bfd_target_unknown_flavour,
 197     BFD_ENDIAN_LITTLE,          /* target byte order */
 198     BFD_ENDIAN_LITTLE,          /* target headers byte order */
 199     (HAS_RELOC | EXEC_P |       /* object flags */
 200      HAS_LINENO | HAS_DEBUG |
 201      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 202     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 203     0,                                                     /* symbol prefix */
 204     ' ',                                                   /* ar_pad_char */
 205     16,                                                    /* ar_max_namelen */
 206     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 207     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 208     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 209     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 210     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 211     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 212
 213     {                           /* bfd_check_format */
 214      _bfd_dummy_target,         /* unknown format */
 215      _bfd_dummy_target,         /* object file */
 216      _bfd_dummy_target,         /* archive */
 217      osf_core_core_file_p       /* a core file */
 218     },
 219     {                           /* bfd_set_format */
 220      bfd_false, bfd_false,
 221      bfd_false, bfd_false
 222     },
 223     {                           /* bfd_write_contents */
 224      bfd_false, bfd_false,
 225      bfd_false, bfd_false
 226     },
 227
 228     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 229     BFD_JUMP_TABLE_COPY (_bfd_generic),
 230     BFD_JUMP_TABLE_CORE (osf_core),
 231     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 232     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 233     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 234     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 235     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 236     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 237
 238     NULL,
 239
 240     (PTR) 0                     /* backend_data */
 241 };