arch/common/boot/grub2/loader/i386/pc/multiboot2.c

   1 /* multiboot2.c - boot a multiboot 2 OS image. */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2007  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <multiboot2.h>
  21 #include <grub/multiboot2.h>
  22 #include <grub/elf.h>
  23 #include <grub/err.h>
  24 #include <grub/machine/loader.h>
  25 #include <grub/mm.h>
  26
  27 grub_err_t
  28 grub_mb2_arch_elf32_hook (Elf32_Phdr *phdr, UNUSED grub_addr_t *addr)
  29 {
  30   Elf32_Addr paddr = phdr->p_paddr;
  31
  32   if ((paddr < grub_os_area_addr)
  33       || (paddr + phdr->p_memsz > grub_os_area_addr + grub_os_area_size))
  34     return grub_error(GRUB_ERR_OUT_OF_RANGE,"Address 0x%x is out of range",
  35                       paddr);
  36
  37   return GRUB_ERR_NONE;
  38 }
  39
  40 grub_err_t
  41 grub_mb2_arch_elf64_hook (Elf64_Phdr *phdr, UNUSED grub_addr_t *addr)
  42 {
  43   Elf64_Addr paddr = phdr->p_paddr;
  44
  45   if ((paddr < grub_os_area_addr)
  46       || (paddr + phdr->p_memsz > grub_os_area_addr + grub_os_area_size))
  47     return grub_error (GRUB_ERR_OUT_OF_RANGE, "Address 0x%x is out of range",
  48                        paddr);
  49
  50   return GRUB_ERR_NONE;
  51 }
  52
  53 grub_err_t
  54 grub_mb2_arch_module_alloc (grub_size_t size, grub_addr_t *addr)
  55 {
  56   grub_addr_t modaddr;
  57
  58   modaddr = grub_memalign (MULTIBOOT2_MOD_ALIGN, size);
  59   if (! modaddr)
  60     return grub_errno;
  61
  62   *addr = modaddr;
  63   return GRUB_ERR_NONE;
  64 }
  65
  66 grub_err_t
  67 grub_mb2_arch_module_free (grub_addr_t addr, UNUSED grub_size_t size)
  68 {
  69   grub_free((void *) addr);
  70   return GRUB_ERR_NONE;
  71 }
  72
  73 void
  74 grub_mb2_arch_boot (grub_addr_t entry, void *tags)
  75 {
  76   grub_multiboot2_real_boot (entry, tags);
  77 }
  78
  79 void
  80 grub_mb2_arch_unload (struct multiboot_tag_header *tags)
  81 {
  82    struct multiboot_tag_header *tag;
  83
  84    /* Free all module memory in the tag list.  */
  85    for_each_tag (tag, tags)
  86      {
  87        if (tag->key == MULTIBOOT2_TAG_MODULE)
  88          {
  89            struct multiboot_tag_module *module =
  90               (struct multiboot_tag_module *) tag;
  91            grub_free((void *) module->addr);
  92          }
  93      }
  94 }
  95
  96 grub_err_t
  97 grub_mb2_tags_arch_create (void)
  98 {
  99   /* XXX Create boot device et al. */
 100   return GRUB_ERR_NONE;
 101 }