コード例 #1
0
ファイル: linux.c プロジェクト: VictorLowther/grub
static grub_err_t
grub_linux_boot (void)
{
  grub_err_t err = 0;
  const char *modevar;
  char *tmp;
  struct grub_relocator32_state state;
  void *real_mode_mem;
  struct grub_linux_boot_ctx ctx = {
    .real_mode_target = 0
  };
  grub_size_t mmap_size;
  grub_size_t cl_offset;

#ifdef GRUB_MACHINE_IEEE1275
  {
    const char *bootpath;
    grub_ssize_t len;

    bootpath = grub_env_get ("root");
    if (bootpath)
      grub_ieee1275_set_property (grub_ieee1275_chosen,
				  "bootpath", bootpath,
				  grub_strlen (bootpath) + 1,
				  &len);
    linux_params.ofw_signature = GRUB_LINUX_OFW_SIGNATURE;
    linux_params.ofw_num_items = 1;
    linux_params.ofw_cif_handler = (grub_uint32_t) grub_ieee1275_entry_fn;
    linux_params.ofw_idt = 0;
  }
#endif

  modevar = grub_env_get ("gfxpayload");

  /* Now all graphical modes are acceptable.
     May change in future if we have modes without framebuffer.  */
  if (modevar && *modevar != 0)
    {
      tmp = grub_xasprintf ("%s;" DEFAULT_VIDEO_MODE, modevar);
      if (! tmp)
	return grub_errno;
#if ACCEPTS_PURE_TEXT
      err = grub_video_set_mode (tmp, 0, 0);
#else
      err = grub_video_set_mode (tmp, GRUB_VIDEO_MODE_TYPE_PURE_TEXT, 0);
#endif
      grub_free (tmp);
    }
  else       /* We can't go back to text mode from coreboot fb.  */
#ifdef GRUB_MACHINE_COREBOOT
    if (grub_video_get_driver_id () == GRUB_VIDEO_DRIVER_COREBOOT)
      err = GRUB_ERR_NONE;
    else
#endif
      {
#if ACCEPTS_PURE_TEXT
	err = grub_video_set_mode (DEFAULT_VIDEO_MODE, 0, 0);
#else
	err = grub_video_set_mode (DEFAULT_VIDEO_MODE,
				 GRUB_VIDEO_MODE_TYPE_PURE_TEXT, 0);
#endif
      }

  if (err)
    {
      grub_print_error ();
      grub_puts_ (N_("Booting in blind mode"));
      grub_errno = GRUB_ERR_NONE;
    }

  if (grub_linux_setup_video (&linux_params))
    {
#if defined (GRUB_MACHINE_PCBIOS) || defined (GRUB_MACHINE_COREBOOT) || defined (GRUB_MACHINE_QEMU)
      linux_params.have_vga = GRUB_VIDEO_LINUX_TYPE_TEXT;
      linux_params.video_mode = 0x3;
#else
      linux_params.have_vga = 0;
      linux_params.video_mode = 0;
      linux_params.video_width = 0;
      linux_params.video_height = 0;
#endif
    }


#ifndef GRUB_MACHINE_IEEE1275
  if (linux_params.have_vga == GRUB_VIDEO_LINUX_TYPE_TEXT)
#endif
    {
      grub_term_output_t term;
      int found = 0;
      FOR_ACTIVE_TERM_OUTPUTS(term)
	if (grub_strcmp (term->name, "vga_text") == 0
	    || grub_strcmp (term->name, "console") == 0
	    || grub_strcmp (term->name, "ofconsole") == 0)
	  {
	    struct grub_term_coordinate pos = grub_term_getxy (term);
	    linux_params.video_cursor_x = pos.x;
	    linux_params.video_cursor_y = pos.y;
	    linux_params.video_width = grub_term_width (term);
	    linux_params.video_height = grub_term_height (term);
	    found = 1;
	    break;
	  }
      if (!found)
	{
	  linux_params.video_cursor_x = 0;
	  linux_params.video_cursor_y = 0;
	  linux_params.video_width = 80;
	  linux_params.video_height = 25;
	}
    }

  mmap_size = find_mmap_size ();
  /* Make sure that each size is aligned to a page boundary.  */
  cl_offset = ALIGN_UP (mmap_size + sizeof (linux_params), 4096);
  if (cl_offset < ((grub_size_t) linux_params.setup_sects << GRUB_DISK_SECTOR_BITS))
    cl_offset = ALIGN_UP ((grub_size_t) (linux_params.setup_sects
					 << GRUB_DISK_SECTOR_BITS), 4096);
  ctx.real_size = ALIGN_UP (cl_offset + maximal_cmdline_size, 4096);

#ifdef GRUB_MACHINE_EFI
  efi_mmap_size = find_efi_mmap_size ();
  if (efi_mmap_size == 0)
    return grub_errno;
#endif

  grub_dprintf ("linux", "real_size = %x, mmap_size = %x\n",
		(unsigned) ctx.real_size, (unsigned) mmap_size);

#ifdef GRUB_MACHINE_EFI
  grub_efi_mmap_iterate (grub_linux_boot_mmap_find, &ctx, 1);
  if (! ctx.real_mode_target)
    grub_efi_mmap_iterate (grub_linux_boot_mmap_find, &ctx, 0);
#else
  grub_mmap_iterate (grub_linux_boot_mmap_find, &ctx);
#endif
  grub_dprintf ("linux", "real_mode_target = %lx, real_size = %x, efi_mmap_size = %x\n",
                (unsigned long) ctx.real_mode_target,
		(unsigned) ctx.real_size,
		(unsigned) efi_mmap_size);

  if (! ctx.real_mode_target)
    return grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate real mode pages");

  {
    grub_relocator_chunk_t ch;
    err = grub_relocator_alloc_chunk_addr (relocator, &ch,
					   ctx.real_mode_target,
					   (ctx.real_size + efi_mmap_size));
    if (err)
     return err;
    real_mode_mem = get_virtual_current_address (ch);
  }
  efi_mmap_buf = (grub_uint8_t *) real_mode_mem + ctx.real_size;

  grub_dprintf ("linux", "real_mode_mem = %p\n",
                real_mode_mem);

  ctx.params = real_mode_mem;

  *ctx.params = linux_params;
  ctx.params->cmd_line_ptr = ctx.real_mode_target + cl_offset;
  grub_memcpy ((char *) ctx.params + cl_offset, linux_cmdline,
	       maximal_cmdline_size);

  grub_dprintf ("linux", "code32_start = %x\n",
		(unsigned) ctx.params->code32_start);

  ctx.e820_num = 0;
  if (grub_mmap_iterate (grub_linux_boot_mmap_fill, &ctx))
    return grub_errno;
  ctx.params->mmap_size = ctx.e820_num;

#ifdef GRUB_MACHINE_EFI
  {
    grub_efi_uintn_t efi_desc_size;
    grub_size_t efi_mmap_target;
    grub_efi_uint32_t efi_desc_version;
    err = grub_efi_finish_boot_services (&efi_mmap_size, efi_mmap_buf, NULL,
					 &efi_desc_size, &efi_desc_version);
    if (err)
      return err;
    
    /* Note that no boot services are available from here.  */
    efi_mmap_target = ctx.real_mode_target 
      + ((grub_uint8_t *) efi_mmap_buf - (grub_uint8_t *) real_mode_mem);
    /* Pass EFI parameters.  */
    if (grub_le_to_cpu16 (ctx.params->version) >= 0x0208)
      {
	ctx.params->v0208.efi_mem_desc_size = efi_desc_size;
	ctx.params->v0208.efi_mem_desc_version = efi_desc_version;
	ctx.params->v0208.efi_mmap = efi_mmap_target;
	ctx.params->v0208.efi_mmap_size = efi_mmap_size;

#ifdef __x86_64__
	ctx.params->v0208.efi_mmap_hi = (efi_mmap_target >> 32);
#endif
      }
    else if (grub_le_to_cpu16 (ctx.params->version) >= 0x0206)
コード例 #2
0
ファイル: multiboot_mbi2.c プロジェクト: cuidi/grub
grub_err_t
grub_multiboot_make_mbi (grub_uint32_t *target)
{
  grub_properly_aligned_t *ptrorig;
  grub_properly_aligned_t *mbistart;
  grub_err_t err;
  grub_size_t bufsize;
  grub_relocator_chunk_t ch;

  bufsize = grub_multiboot_get_mbi_size ();

  COMPILE_TIME_ASSERT (MULTIBOOT_TAG_ALIGN % sizeof (grub_properly_aligned_t) == 0);

  err = grub_relocator_alloc_chunk_align (grub_multiboot_relocator, &ch,
					  0, 0xffffffff - bufsize,
					  bufsize, MULTIBOOT_TAG_ALIGN,
					  GRUB_RELOCATOR_PREFERENCE_NONE, 1);
  if (err)
    return err;

  ptrorig = get_virtual_current_address (ch);
#if defined (__i386__) || defined (__x86_64__)
  *target = get_physical_target_address (ch);
#elif defined (__mips)
  *target = get_physical_target_address (ch) | 0x80000000;
#else
#error Please complete this
#endif

  mbistart = ptrorig;
  COMPILE_TIME_ASSERT ((2 * sizeof (grub_uint32_t))
		       % sizeof (grub_properly_aligned_t) == 0);
  COMPILE_TIME_ASSERT (MULTIBOOT_TAG_ALIGN
		       % sizeof (grub_properly_aligned_t) == 0);
  ptrorig += (2 * sizeof (grub_uint32_t)) / sizeof (grub_properly_aligned_t);

  {
    struct multiboot_tag_string *tag = (struct multiboot_tag_string *) ptrorig;
    tag->type = MULTIBOOT_TAG_TYPE_CMDLINE;
    tag->size = sizeof (struct multiboot_tag_string) + cmdline_size; 
    grub_memcpy (tag->string, cmdline, cmdline_size);
    ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
       / sizeof (grub_properly_aligned_t);
  }

  {
    struct multiboot_tag_string *tag = (struct multiboot_tag_string *) ptrorig;
    tag->type = MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME;
    tag->size = sizeof (struct multiboot_tag_string) + sizeof (PACKAGE_STRING); 
    grub_memcpy (tag->string, PACKAGE_STRING, sizeof (PACKAGE_STRING));
    ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
      / sizeof (grub_properly_aligned_t);
  }

#ifdef GRUB_MACHINE_PCBIOS
  {
    struct grub_apm_info info;
    if (grub_apm_get_info (&info))
      {
	struct multiboot_tag_apm *tag = (struct multiboot_tag_apm *) ptrorig;

	tag->type = MULTIBOOT_TAG_TYPE_APM;
	tag->size = sizeof (struct multiboot_tag_apm); 

	tag->cseg = info.cseg;
	tag->offset = info.offset;
	tag->cseg_16 = info.cseg_16;
	tag->dseg = info.dseg;
	tag->flags = info.flags;
	tag->cseg_len = info.cseg_len;
	tag->dseg_len = info.dseg_len;
	tag->cseg_16_len = info.cseg_16_len;
	tag->version = info.version;

	ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
	  / sizeof (grub_properly_aligned_t);
      }
  }
#endif

  {
    unsigned i;
    struct module *cur;

    for (i = 0, cur = modules; i < modcnt; i++, cur = cur->next)
      {
	struct multiboot_tag_module *tag
	  = (struct multiboot_tag_module *) ptrorig;
	tag->type = MULTIBOOT_TAG_TYPE_MODULE;
	tag->size = sizeof (struct multiboot_tag_module) + cur->cmdline_size;
	tag->mod_start = cur->start;
	tag->mod_end = tag->mod_start + cur->size;
	grub_memcpy (tag->cmdline, cur->cmdline, cur->cmdline_size);
	ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
	  / sizeof (grub_properly_aligned_t);
      }
  }

  {
    struct multiboot_tag_mmap *tag = (struct multiboot_tag_mmap *) ptrorig;
    grub_fill_multiboot_mmap (tag);
    ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
      / sizeof (grub_properly_aligned_t);
  }

  {
    struct multiboot_tag_elf_sections *tag
      = (struct multiboot_tag_elf_sections *) ptrorig;
    tag->type = MULTIBOOT_TAG_TYPE_ELF_SECTIONS;
    tag->size = sizeof (struct multiboot_tag_elf_sections)
      + elf_sec_entsize * elf_sec_num;
    grub_memcpy (tag->sections, elf_sections, elf_sec_entsize * elf_sec_num);
    tag->num = elf_sec_num;
    tag->entsize = elf_sec_entsize;
    tag->shndx = elf_sec_shstrndx;
    ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
      / sizeof (grub_properly_aligned_t);
  }

  {
    struct multiboot_tag_basic_meminfo *tag
      = (struct multiboot_tag_basic_meminfo *) ptrorig;
    tag->type = MULTIBOOT_TAG_TYPE_BASIC_MEMINFO;
    tag->size = sizeof (struct multiboot_tag_basic_meminfo); 

    /* Convert from bytes to kilobytes.  */
    tag->mem_lower = grub_mmap_get_lower () / 1024;
    tag->mem_upper = grub_mmap_get_upper () / 1024;
    ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
       / sizeof (grub_properly_aligned_t);
  }

  {
    struct grub_net_network_level_interface *net;

    FOR_NET_NETWORK_LEVEL_INTERFACES(net)
      if (net->dhcp_ack)
	{
	  struct multiboot_tag_network *tag
	    = (struct multiboot_tag_network *) ptrorig;
	  tag->type = MULTIBOOT_TAG_TYPE_NETWORK;
	  tag->size = sizeof (struct multiboot_tag_network) + net->dhcp_acklen;
	  grub_memcpy (tag->dhcpack, net->dhcp_ack, net->dhcp_acklen);
	  ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
	    / sizeof (grub_properly_aligned_t);
	}
  }

  if (bootdev_set)
    {
      struct multiboot_tag_bootdev *tag
	= (struct multiboot_tag_bootdev *) ptrorig;
      tag->type = MULTIBOOT_TAG_TYPE_BOOTDEV;
      tag->size = sizeof (struct multiboot_tag_bootdev); 

      tag->biosdev = biosdev;
      tag->slice = slice;
      tag->part = part;
      ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
	/ sizeof (grub_properly_aligned_t);
    }

  {
    err = retrieve_video_parameters (&ptrorig);
    if (err)
      {
	grub_print_error ();
	grub_errno = GRUB_ERR_NONE;
      }
  }

#if defined (GRUB_MACHINE_EFI) && defined (__x86_64__)
  {
    struct multiboot_tag_efi64 *tag = (struct multiboot_tag_efi64 *) ptrorig;
    tag->type = MULTIBOOT_TAG_TYPE_EFI64;
    tag->size = sizeof (*tag);
    tag->pointer = (grub_addr_t) grub_efi_system_table;
    ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
      / sizeof (grub_properly_aligned_t);
  }
#endif

#if defined (GRUB_MACHINE_EFI) && defined (__i386__)
  {
    struct multiboot_tag_efi32 *tag = (struct multiboot_tag_efi32 *) ptrorig;
    tag->type = MULTIBOOT_TAG_TYPE_EFI32;
    tag->size = sizeof (*tag);
    tag->pointer = (grub_addr_t) grub_efi_system_table;
    ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
      / sizeof (grub_properly_aligned_t);
  }
#endif

#if GRUB_MACHINE_HAS_ACPI
  {
    struct multiboot_tag_old_acpi *tag = (struct multiboot_tag_old_acpi *)
      ptrorig;
    struct grub_acpi_rsdp_v10 *a = grub_acpi_get_rsdpv1 ();
    if (a)
      {
	tag->type = MULTIBOOT_TAG_TYPE_ACPI_OLD;
	tag->size = sizeof (*tag) + sizeof (*a);
	grub_memcpy (tag->rsdp, a, sizeof (*a));
	ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
	  / sizeof (grub_properly_aligned_t);
      }
  }

  {
    struct multiboot_tag_new_acpi *tag = (struct multiboot_tag_new_acpi *)
      ptrorig;
    struct grub_acpi_rsdp_v20 *a = grub_acpi_get_rsdpv2 ();
    if (a)
      {
	tag->type = MULTIBOOT_TAG_TYPE_ACPI_NEW;
	tag->size = sizeof (*tag) + a->length;
	grub_memcpy (tag->rsdp, a, a->length);
	ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
	  / sizeof (grub_properly_aligned_t);
      }
  }
#endif

#ifdef GRUB_MACHINE_EFI
  {
    struct multiboot_tag_efi_mmap *tag = (struct multiboot_tag_efi_mmap *) ptrorig;
    grub_efi_uintn_t efi_desc_size;
    grub_efi_uint32_t efi_desc_version;

    tag->type = MULTIBOOT_TAG_TYPE_EFI_MMAP;
    tag->size = sizeof (*tag) + efi_mmap_size;

    if (!keep_bs)
      err = grub_efi_finish_boot_services (&efi_mmap_size, tag->efi_mmap, NULL,
					   &efi_desc_size, &efi_desc_version);
    else
      {
	if (grub_efi_get_memory_map (&efi_mmap_size, (void *) tag->efi_mmap,
				     NULL,
				     &efi_desc_size, &efi_desc_version) <= 0)
	  err = grub_error (GRUB_ERR_IO, "couldn't retrieve memory map");
      }
    if (err)
      return err;
    tag->descr_size = efi_desc_size;
    tag->descr_vers = efi_desc_version;
    tag->size = sizeof (*tag) + efi_mmap_size;

    ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
      / sizeof (grub_properly_aligned_t);
  }

  if (keep_bs)
    {
      struct multiboot_tag *tag = (struct multiboot_tag *) ptrorig;
      tag->type = MULTIBOOT_TAG_TYPE_EFI_BS;
      tag->size = sizeof (struct multiboot_tag);
      ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
	/ sizeof (grub_properly_aligned_t);
    }
#endif

  {
    struct multiboot_tag *tag = (struct multiboot_tag *) ptrorig;
    tag->type = MULTIBOOT_TAG_TYPE_END;
    tag->size = sizeof (struct multiboot_tag);
    ptrorig += ALIGN_UP (tag->size, MULTIBOOT_TAG_ALIGN)
      / sizeof (grub_properly_aligned_t);
  }

  ((grub_uint32_t *) mbistart)[0] = (char *) ptrorig - (char *) mbistart;
  ((grub_uint32_t *) mbistart)[1] = 0;

  return GRUB_ERR_NONE;
}
コード例 #3
0
ファイル: multiboot_mbi.c プロジェクト: ChinaFengliang/grub
grub_err_t
grub_multiboot_make_mbi (grub_uint32_t *target)
{
  struct multiboot_info *mbi;
  struct multiboot_mod_list *modlist;
  unsigned i;
  struct module *cur;
  grub_size_t mmap_size;
  grub_uint8_t *ptrorig; 
  grub_addr_t ptrdest;

  grub_err_t err;
  grub_size_t bufsize;
  grub_relocator_chunk_t ch;

  bufsize = grub_multiboot_get_mbi_size ();

  err = grub_relocator_alloc_chunk_align (grub_multiboot_relocator, &ch,
					  0x10000, 0xa0000 - bufsize,
					  bufsize, 4,
					  GRUB_RELOCATOR_PREFERENCE_NONE, 0);
  if (err)
    return err;
  ptrorig = get_virtual_current_address (ch);
  ptrdest = get_physical_target_address (ch);

  *target = ptrdest;

  mbi = (struct multiboot_info *) ptrorig;
  ptrorig += sizeof (*mbi);
  ptrdest += sizeof (*mbi);
  grub_memset (mbi, 0, sizeof (*mbi));

  grub_memcpy (ptrorig, cmdline, cmdline_size);
  mbi->flags |= MULTIBOOT_INFO_CMDLINE;
  mbi->cmdline = ptrdest;
  ptrorig += ALIGN_UP (cmdline_size, 4);
  ptrdest += ALIGN_UP (cmdline_size, 4);

  grub_memcpy (ptrorig, PACKAGE_STRING, sizeof(PACKAGE_STRING));
  mbi->flags |= MULTIBOOT_INFO_BOOT_LOADER_NAME;
  mbi->boot_loader_name = ptrdest;
  ptrorig += ALIGN_UP (sizeof(PACKAGE_STRING), 4);
  ptrdest += ALIGN_UP (sizeof(PACKAGE_STRING), 4);

#ifdef GRUB_MACHINE_PCBIOS
  {
    struct grub_apm_info info;
    if (grub_apm_get_info (&info))
      {
	struct multiboot_apm_info *mbinfo = (void *) ptrorig;

	mbinfo->cseg = info.cseg;
	mbinfo->offset = info.offset;
	mbinfo->cseg_16 = info.cseg_16;
	mbinfo->dseg = info.dseg;
	mbinfo->flags = info.flags;
	mbinfo->cseg_len = info.cseg_len;
	mbinfo->dseg_len = info.dseg_len;
	mbinfo->cseg_16_len = info.cseg_16_len;
	mbinfo->version = info.version;

	ptrorig += ALIGN_UP (sizeof (struct multiboot_apm_info), 4);
	ptrdest += ALIGN_UP (sizeof (struct multiboot_apm_info), 4);
      }
  }
#endif

  if (modcnt)
    {
      mbi->flags |= MULTIBOOT_INFO_MODS;
      mbi->mods_addr = ptrdest;
      mbi->mods_count = modcnt;
      modlist = (struct multiboot_mod_list *) ptrorig;
      ptrorig += modcnt * sizeof (struct multiboot_mod_list);
      ptrdest += modcnt * sizeof (struct multiboot_mod_list);

      for (i = 0, cur = modules; i < modcnt; i++, cur = cur->next)
	{
	  modlist[i].mod_start = cur->start;
	  modlist[i].mod_end = modlist[i].mod_start + cur->size;
	  modlist[i].cmdline = ptrdest;
	  grub_memcpy (ptrorig, cur->cmdline, cur->cmdline_size);
	  ptrorig += ALIGN_UP (cur->cmdline_size, 4);
	  ptrdest += ALIGN_UP (cur->cmdline_size, 4);
	}
    }
  else
    {
      mbi->mods_addr = 0;
      mbi->mods_count = 0;
    }

  mmap_size = grub_get_multiboot_mmap_count () 
    * sizeof (struct multiboot_mmap_entry);
  grub_fill_multiboot_mmap ((struct multiboot_mmap_entry *) ptrorig);
  mbi->mmap_length = mmap_size;
  mbi->mmap_addr = ptrdest;
  mbi->flags |= MULTIBOOT_INFO_MEM_MAP;
  ptrorig += mmap_size;
  ptrdest += mmap_size;

  /* Convert from bytes to kilobytes.  */
  mbi->mem_lower = grub_mmap_get_lower () / 1024;
  mbi->mem_upper = grub_mmap_get_upper () / 1024;
  mbi->flags |= MULTIBOOT_INFO_MEMORY;

  if (bootdev_set)
    {
      mbi->boot_device = bootdev;
      mbi->flags |= MULTIBOOT_INFO_BOOTDEV;
    }

  {
    struct grub_net_network_level_interface *net;
    FOR_NET_NETWORK_LEVEL_INTERFACES(net)
      if (net->dhcp_ack)
	{
	  grub_memcpy (ptrorig, net->dhcp_ack, net->dhcp_acklen);
	  mbi->drives_addr = ptrdest;
	  mbi->drives_length = net->dhcp_acklen;
	  ptrorig += net->dhcp_acklen;
	  ptrdest += net->dhcp_acklen;
	  break;
	}
  }

  if (elf_sec_num)
    {
      mbi->u.elf_sec.addr = ptrdest;
      grub_memcpy (ptrorig, elf_sections, elf_sec_entsize * elf_sec_num);
      mbi->u.elf_sec.num = elf_sec_num;
      mbi->u.elf_sec.size = elf_sec_entsize;
      mbi->u.elf_sec.shndx = elf_sec_shstrndx;

      mbi->flags |= MULTIBOOT_INFO_ELF_SHDR;

      ptrorig += elf_sec_entsize * elf_sec_num;
      ptrdest += elf_sec_entsize * elf_sec_num;
    }

  err = retrieve_video_parameters (mbi, ptrorig, ptrdest);
  if (err)
    {
      grub_print_error ();
      grub_errno = GRUB_ERR_NONE;
    }

  if ((mbi->flags & MULTIBOOT_INFO_FRAMEBUFFER_INFO)
      && mbi->framebuffer_type == MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED)
    {
      ptrorig += mbi->framebuffer_palette_num_colors
	* sizeof (struct multiboot_color);
      ptrdest += mbi->framebuffer_palette_num_colors
	* sizeof (struct multiboot_color);
    }

#if GRUB_MACHINE_HAS_VBE
  ptrorig += sizeof (struct grub_vbe_info_block);
  ptrdest += sizeof (struct grub_vbe_info_block);
  ptrorig += sizeof (struct grub_vbe_mode_info_block);
  ptrdest += sizeof (struct grub_vbe_mode_info_block);
#endif

#ifdef GRUB_MACHINE_EFI
  err = grub_efi_finish_boot_services (NULL, NULL, NULL, NULL, NULL);
  if (err)
    return err;
#endif

  return GRUB_ERR_NONE;
}