kernel/arch/i386/elf32.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <elf.h>
  20
  21 unsigned arch_elf_detect (elf_file_t *file)
  22 {
  23         if(file->magic != 0x464C457FL) { /* "\x7fELF" */
  24                 kprintf ("File is not relocatable ELF; has bad magic value "
  25                         "0x%lX (should be 0x464C457F)\n", file->magic);
  26                 return 0;
  27         }
  28
  29         if(file->bitness != 1) {
  30                 kprintf ("File is 64-bit ELF, not 32-bit\n");
  31                 return 0;
  32         }
  33
  34         if(file->endian != 1) {
  35                 kprintf ("File is big endian ELF, not little\n");
  36                 return 0;
  37         }
  38
  39         if(file->elf_ver_1 != 1) {
  40                 kprintf ("File has bad ELF version %u\n", file->elf_ver_1);
  41                 return 0;
  42         }
  43
  44         if(file->file_type != 1 && file->file_type != 2) {
  45                 kprintf ("File is not relocatable ELF (could be "
  46                         "executable, DLL, or core file) - currently is %d\n", file->file_type);
  47                 return 0;
  48         }
  49
  50         if(file->machine != 3) {
  51                 kprintf ("File is not i386 ELF\n");
  52                 return 0;
  53         }
  54
  55         if(file->elf_ver_2 != 1) {
  56                 kprintf ("File has bad ELF version %lu\n", file->elf_ver_2);
  57                 return 0;
  58         }
  59
  60         return 1;
  61 }