bfd/osf-core.c

   1 /* BFD back-end for OSF/1 core files.
   2    Copyright 1993, 1994, 1995, 1998, 1999, 2001, 2002, 2003, 2004
   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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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 #ifdef OSF_CORE
  30 #include <sys/core.h>
  31 #endif
  32
  33 /* forward declarations */
  34
  35 static asection *make_bfd_asection
  36   PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr));
  37 static const bfd_target *osf_core_core_file_p
  38   PARAMS ((bfd *));
  39 static char *osf_core_core_file_failing_command
  40   PARAMS ((bfd *));
  41 static int osf_core_core_file_failing_signal
  42   PARAMS ((bfd *));
  43 #define osf_core_core_file_matches_executable_p generic_core_file_matches_executable_p
  44 static void swap_abort
  45   PARAMS ((void));
  46
  47 /* These are stored in the bfd's tdata */
  48
  49 struct osf_core_struct
  50 {
  51   int sig;
  52   char cmd[MAXCOMLEN + 1];
  53 };
  54
  55 #define core_hdr(bfd) ((bfd)->tdata.osf_core_data)
  56 #define core_signal(bfd) (core_hdr(bfd)->sig)
  57 #define core_command(bfd) (core_hdr(bfd)->cmd)
  58
  59 static asection *
  60 make_bfd_asection (abfd, name, flags, size, vma, filepos)
  61      bfd *abfd;
  62      const char *name;
  63      flagword flags;
  64      bfd_size_type size;
  65      bfd_vma vma;
  66      file_ptr filepos;
  67 {
  68   asection *asect;
  69
  70   asect = bfd_make_section_anyway (abfd, name);
  71   if (!asect)
  72     return NULL;
  73
  74   asect->flags = flags;
  75   asect->size = size;
  76   asect->vma = vma;
  77   asect->filepos = filepos;
  78   asect->alignment_power = 8;
  79
  80   return asect;
  81 }
  82
  83 static const bfd_target *
  84 osf_core_core_file_p (abfd)
  85      bfd *abfd;
  86 {
  87   int val;
  88   int i;
  89   char *secname;
  90   struct core_filehdr core_header;
  91   bfd_size_type amt;
  92
  93   amt = sizeof core_header;
  94   val = bfd_bread ((PTR) &core_header, amt, abfd);
  95   if (val != sizeof core_header)
  96     return NULL;
  97
  98   if (strncmp (core_header.magic, "Core", 4) != 0)
  99     return NULL;
 100
 101   core_hdr (abfd) = (struct osf_core_struct *)
 102     bfd_zalloc (abfd, (bfd_size_type) sizeof (struct osf_core_struct));
 103   if (!core_hdr (abfd))
 104     return NULL;
 105
 106   strncpy (core_command (abfd), core_header.name, MAXCOMLEN + 1);
 107   core_signal (abfd) = core_header.signo;
 108
 109   for (i = 0; i < core_header.nscns; i++)
 110     {
 111       struct core_scnhdr core_scnhdr;
 112       flagword flags;
 113
 114       amt = sizeof core_scnhdr;
 115       val = bfd_bread ((PTR) &core_scnhdr, amt, abfd);
 116       if (val != sizeof core_scnhdr)
 117         break;
 118
 119       /* Skip empty sections.  */
 120       if (core_scnhdr.size == 0 || core_scnhdr.scnptr == 0)
 121         continue;
 122
 123       switch (core_scnhdr.scntype)
 124         {
 125         case SCNRGN:
 126           secname = ".data";
 127           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 128           break;
 129         case SCNSTACK:
 130           secname = ".stack";
 131           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 132           break;
 133         case SCNREGS:
 134           secname = ".reg";
 135           flags = SEC_HAS_CONTENTS;
 136           break;
 137         default:
 138           (*_bfd_error_handler) (_("Unhandled OSF/1 core file section type %d\n"),
 139                                  core_scnhdr.scntype);
 140           continue;
 141         }
 142
 143       if (!make_bfd_asection (abfd, secname, flags,
 144                               (bfd_size_type) core_scnhdr.size,
 145                               (bfd_vma) core_scnhdr.vaddr,
 146                               (file_ptr) core_scnhdr.scnptr))
 147         goto fail;
 148     }
 149
 150   /* OK, we believe you.  You're a core file (sure, sure).  */
 151
 152   return abfd->xvec;
 153
 154  fail:
 155   bfd_release (abfd, core_hdr (abfd));
 156   core_hdr (abfd) = NULL;
 157   bfd_section_list_clear (abfd);
 158   return NULL;
 159 }
 160
 161 static char *
 162 osf_core_core_file_failing_command (abfd)
 163      bfd *abfd;
 164 {
 165   return core_command (abfd);
 166 }
 167
 168 static int
 169 osf_core_core_file_failing_signal (abfd)
 170      bfd *abfd;
 171 {
 172   return core_signal (abfd);
 173 }
 174 \f
 175 /* If somebody calls any byte-swapping routines, shoot them.  */
 176 static void
 177 swap_abort()
 178 {
 179   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 180 }
 181
 182 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 183 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 184 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 185 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 186 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 187 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 188
 189 const bfd_target osf_core_vec =
 190   {
 191     "osf-core",
 192     bfd_target_unknown_flavour,
 193     BFD_ENDIAN_LITTLE,          /* target byte order */
 194     BFD_ENDIAN_LITTLE,          /* target headers byte order */
 195     (HAS_RELOC | EXEC_P |       /* object flags */
 196      HAS_LINENO | HAS_DEBUG |
 197      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 198     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 199     0,                                                     /* symbol prefix */
 200     ' ',                                                   /* ar_pad_char */
 201     16,                                                    /* ar_max_namelen */
 202     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
 203     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
 204     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
 205     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
 206     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
 207     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
 208
 209     {                           /* bfd_check_format */
 210       _bfd_dummy_target,                /* unknown format */
 211       _bfd_dummy_target,                /* object file */
 212       _bfd_dummy_target,                /* archive */
 213       osf_core_core_file_p              /* a core file */
 214     },
 215     {                           /* bfd_set_format */
 216       bfd_false, bfd_false,
 217       bfd_false, bfd_false
 218     },
 219     {                           /* bfd_write_contents */
 220       bfd_false, bfd_false,
 221       bfd_false, bfd_false
 222     },
 223
 224     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 225     BFD_JUMP_TABLE_COPY (_bfd_generic),
 226     BFD_JUMP_TABLE_CORE (osf_core),
 227     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 228     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 229     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 230     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 231     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 232     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 233
 234     NULL,
 235
 236     (PTR) 0                     /* backend_data */
 237   };