arch/all-pc/boot/grub2-aros/grub-core/loader/aout.c

   1 /*
   2  *  Copyright (C) 2008 Free Software Foundation, Inc.
   3  *
   4  *  This program is free software: you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation, either version 3 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <grub/file.h>
  19 #include <grub/err.h>
  20 #include <grub/dl.h>
  21 #include <grub/misc.h>
  22 #include <grub/aout.h>
  23
  24 GRUB_MOD_LICENSE ("GPLv3+");
  25
  26 int
  27 grub_aout_get_type (union grub_aout_header *header)
  28 {
  29   int magic;
  30
  31   magic = AOUT_GETMAGIC (header->aout32);
  32   if ((magic == AOUT32_OMAGIC) || (magic == AOUT32_NMAGIC) ||
  33       (magic == AOUT32_ZMAGIC) || (magic == AOUT32_QMAGIC))
  34     return AOUT_TYPE_AOUT32;
  35   else if ((magic == AOUT64_OMAGIC) || (magic == AOUT64_NMAGIC) ||
  36            (magic == AOUT64_ZMAGIC))
  37     return AOUT_TYPE_AOUT64;
  38   else
  39     return AOUT_TYPE_NONE;
  40 }
  41
  42 grub_err_t
  43 grub_aout_load (grub_file_t file, int offset,
  44                 void *load_addr,
  45                 int load_size, grub_size_t bss_size)
  46 {
  47   if ((grub_file_seek (file, offset)) == (grub_off_t) - 1)
  48     return grub_errno;
  49
  50   if (!load_size)
  51     load_size = file->size - offset;
  52
  53   grub_file_read (file, load_addr, load_size);
  54
  55   if (grub_errno)
  56     return grub_errno;
  57
  58   if (bss_size)
  59     grub_memset ((char *) load_addr + load_size, 0, bss_size);
  60
  61   return GRUB_ERR_NONE;
  62 }