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, 2010, 2011 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 #define osf_core_core_file_pid _bfd_nocore_core_file_pid
  47 static void swap_abort
  48   PARAMS ((void));
  49
  50 /* These are stored in the bfd's tdata */
  51
  52 struct osf_core_struct
  53 {
  54   int sig;
  55   char cmd[MAXCOMLEN + 1];
  56 };
  57
  58 #define core_hdr(bfd) ((bfd)->tdata.osf_core_data)
  59 #define core_signal(bfd) (core_hdr(bfd)->sig)
  60 #define core_command(bfd) (core_hdr(bfd)->cmd)
  61
  62 static asection *
  63 make_bfd_asection (abfd, name, flags, size, vma, filepos)
  64      bfd *abfd;
  65      const char *name;
  66      flagword flags;
  67      bfd_size_type size;
  68      bfd_vma vma;
  69      file_ptr filepos;
  70 {
  71   asection *asect;
  72
  73   asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
  74   if (!asect)
  75     return NULL;
  76
  77   asect->size = size;
  78   asect->vma = vma;
  79   asect->filepos = filepos;
  80   asect->alignment_power = 8;
  81
  82   return asect;
  83 }
  84
  85 static const bfd_target *
  86 osf_core_core_file_p (abfd)
  87      bfd *abfd;
  88 {
  89   int val;
  90   int i;
  91   char *secname;
  92   struct core_filehdr core_header;
  93   bfd_size_type amt;
  94
  95   amt = sizeof core_header;
  96   val = bfd_bread ((PTR) &core_header, amt, abfd);
  97   if (val != sizeof core_header)
  98     return NULL;
  99
 100   if (! CONST_STRNEQ (core_header.magic, "Core"))
 101     return NULL;
 102
 103   core_hdr (abfd) = (struct osf_core_struct *)
 104     bfd_zalloc (abfd, (bfd_size_type) sizeof (struct osf_core_struct));
 105   if (!core_hdr (abfd))
 106     return NULL;
 107
 108   strncpy (core_command (abfd), core_header.name, MAXCOMLEN + 1);
 109   core_signal (abfd) = core_header.signo;
 110
 111   for (i = 0; i < core_header.nscns; i++)
 112     {
 113       struct core_scnhdr core_scnhdr;
 114       flagword flags;
 115
 116       amt = sizeof core_scnhdr;
 117       val = bfd_bread ((PTR) &core_scnhdr, amt, abfd);
 118       if (val != sizeof core_scnhdr)
 119         break;
 120
 121       /* Skip empty sections.  */
 122       if (core_scnhdr.size == 0 || core_scnhdr.scnptr == 0)
 123         continue;
 124
 125       switch (core_scnhdr.scntype)
 126         {
 127         case SCNRGN:
 128           secname = ".data";
 129           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 130           break;
 131         case SCNSTACK:
 132           secname = ".stack";
 133           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 134           break;
 135         case SCNREGS:
 136           secname = ".reg";
 137           flags = SEC_HAS_CONTENTS;
 138           break;
 139         default:
 140           (*_bfd_error_handler) (_("Unhandled OSF/1 core file section type %d\n"),
 141                                  core_scnhdr.scntype);
 142           continue;
 143         }
 144
 145       if (!make_bfd_asection (abfd, secname, flags,
 146                               (bfd_size_type) core_scnhdr.size,
 147                               (bfd_vma) core_scnhdr.vaddr,
 148                               (file_ptr) core_scnhdr.scnptr))
 149         goto fail;
 150     }
 151
 152   /* OK, we believe you.  You're a core file (sure, sure).  */
 153
 154   return abfd->xvec;
 155
 156  fail:
 157   bfd_release (abfd, core_hdr (abfd));
 158   core_hdr (abfd) = NULL;
 159   bfd_section_list_clear (abfd);
 160   return NULL;
 161 }
 162
 163 static char *
 164 osf_core_core_file_failing_command (abfd)
 165      bfd *abfd;
 166 {
 167   return core_command (abfd);
 168 }
 169
 170 static int
 171 osf_core_core_file_failing_signal (abfd)
 172      bfd *abfd;
 173 {
 174   return core_signal (abfd);
 175 }
 176 \f
 177 /* If somebody calls any byte-swapping routines, shoot them.  */
 178 static void
 179 swap_abort()
 180 {
 181   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 182 }
 183
 184 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 185 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 186 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 187 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 188 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 189 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 190
 191 const bfd_target osf_core_vec =
 192   {
 193     "osf-core",
 194     bfd_target_unknown_flavour,
 195     BFD_ENDIAN_LITTLE,          /* target byte order */
 196     BFD_ENDIAN_LITTLE,          /* target headers byte order */
 197     (HAS_RELOC | EXEC_P |       /* object flags */
 198      HAS_LINENO | HAS_DEBUG |
 199      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 200     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 201     0,                          /* symbol prefix */
 202     ' ',                        /* ar_pad_char */
 203     16,                         /* ar_max_namelen */
 204     0,                          /* match priority.  */
 205     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
 206     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
 207     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
 208     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
 209     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
 210     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
 211
 212     {                           /* bfd_check_format */
 213       _bfd_dummy_target,                /* unknown format */
 214       _bfd_dummy_target,                /* object file */
 215       _bfd_dummy_target,                /* archive */
 216       osf_core_core_file_p              /* a core file */
 217     },
 218     {                           /* bfd_set_format */
 219       bfd_false, bfd_false,
 220       bfd_false, bfd_false
 221     },
 222     {                           /* bfd_write_contents */
 223       bfd_false, bfd_false,
 224       bfd_false, bfd_false
 225     },
 226
 227     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 228     BFD_JUMP_TABLE_COPY (_bfd_generic),
 229     BFD_JUMP_TABLE_CORE (osf_core),
 230     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 231     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 232     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 233     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 234     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 235     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 236
 237     NULL,
 238
 239     (PTR) 0                     /* backend_data */
 240   };