bfd/osf-core.c

   1 /* BFD back-end for OSF/1 core files.
   2    Copyright 1993, 1994, 1995, 1998, 1999, 2001, 2002, 2003, 2004, 2005, 2006,
   3    2007 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22
  23 /* This file can only be compiled on systems which use OSF/1 style
  24    core files.  */
  25
  26 #include "sysdep.h"
  27 #include "bfd.h"
  28 #include "libbfd.h"
  29
  30 #include <sys/user.h>
  31 #ifdef OSF_CORE
  32 #include <sys/core.h>
  33 #endif
  34
  35 /* forward declarations */
  36
  37 static asection *make_bfd_asection
  38   PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr));
  39 static const bfd_target *osf_core_core_file_p
  40   PARAMS ((bfd *));
  41 static char *osf_core_core_file_failing_command
  42   PARAMS ((bfd *));
  43 static int osf_core_core_file_failing_signal
  44   PARAMS ((bfd *));
  45 #define osf_core_core_file_matches_executable_p generic_core_file_matches_executable_p
  46 static void swap_abort
  47   PARAMS ((void));
  48
  49 /* These are stored in the bfd's tdata */
  50
  51 struct osf_core_struct
  52 {
  53   int sig;
  54   char cmd[MAXCOMLEN + 1];
  55 };
  56
  57 #define core_hdr(bfd) ((bfd)->tdata.osf_core_data)
  58 #define core_signal(bfd) (core_hdr(bfd)->sig)
  59 #define core_command(bfd) (core_hdr(bfd)->cmd)
  60
  61 static asection *
  62 make_bfd_asection (abfd, name, flags, size, vma, filepos)
  63      bfd *abfd;
  64      const char *name;
  65      flagword flags;
  66      bfd_size_type size;
  67      bfd_vma vma;
  68      file_ptr filepos;
  69 {
  70   asection *asect;
  71
  72   asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
  73   if (!asect)
  74     return NULL;
  75
  76   asect->size = size;
  77   asect->vma = vma;
  78   asect->filepos = filepos;
  79   asect->alignment_power = 8;
  80
  81   return asect;
  82 }
  83
  84 static const bfd_target *
  85 osf_core_core_file_p (abfd)
  86      bfd *abfd;
  87 {
  88   int val;
  89   int i;
  90   char *secname;
  91   struct core_filehdr core_header;
  92   bfd_size_type amt;
  93
  94   amt = sizeof core_header;
  95   val = bfd_bread ((PTR) &core_header, amt, abfd);
  96   if (val != sizeof core_header)
  97     return NULL;
  98
  99   if (! CONST_STRNEQ (core_header.magic, "Core"))
 100     return NULL;
 101
 102   core_hdr (abfd) = (struct osf_core_struct *)
 103     bfd_zalloc (abfd, (bfd_size_type) sizeof (struct osf_core_struct));
 104   if (!core_hdr (abfd))
 105     return NULL;
 106
 107   strncpy (core_command (abfd), core_header.name, MAXCOMLEN + 1);
 108   core_signal (abfd) = core_header.signo;
 109
 110   for (i = 0; i < core_header.nscns; i++)
 111     {
 112       struct core_scnhdr core_scnhdr;
 113       flagword flags;
 114
 115       amt = sizeof core_scnhdr;
 116       val = bfd_bread ((PTR) &core_scnhdr, amt, abfd);
 117       if (val != sizeof core_scnhdr)
 118         break;
 119
 120       /* Skip empty sections.  */
 121       if (core_scnhdr.size == 0 || core_scnhdr.scnptr == 0)
 122         continue;
 123
 124       switch (core_scnhdr.scntype)
 125         {
 126         case SCNRGN:
 127           secname = ".data";
 128           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 129           break;
 130         case SCNSTACK:
 131           secname = ".stack";
 132           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 133           break;
 134         case SCNREGS:
 135           secname = ".reg";
 136           flags = SEC_HAS_CONTENTS;
 137           break;
 138         default:
 139           (*_bfd_error_handler) (_("Unhandled OSF/1 core file section type %d\n"),
 140                                  core_scnhdr.scntype);
 141           continue;
 142         }
 143
 144       if (!make_bfd_asection (abfd, secname, flags,
 145                               (bfd_size_type) core_scnhdr.size,
 146                               (bfd_vma) core_scnhdr.vaddr,
 147                               (file_ptr) core_scnhdr.scnptr))
 148         goto fail;
 149     }
 150
 151   /* OK, we believe you.  You're a core file (sure, sure).  */
 152
 153   return abfd->xvec;
 154
 155  fail:
 156   bfd_release (abfd, core_hdr (abfd));
 157   core_hdr (abfd) = NULL;
 158   bfd_section_list_clear (abfd);
 159   return NULL;
 160 }
 161
 162 static char *
 163 osf_core_core_file_failing_command (abfd)
 164      bfd *abfd;
 165 {
 166   return core_command (abfd);
 167 }
 168
 169 static int
 170 osf_core_core_file_failing_signal (abfd)
 171      bfd *abfd;
 172 {
 173   return core_signal (abfd);
 174 }
 175 \f
 176 /* If somebody calls any byte-swapping routines, shoot them.  */
 177 static void
 178 swap_abort()
 179 {
 180   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 181 }
 182
 183 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 184 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 185 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 186 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 187 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 188 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) 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_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
 204     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
 205     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
 206     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
 207     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
 208     NO_GET, NO_GETS, 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   };