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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2009 Free Software Foundation, Inc.
* Copyright (C) 2016 Oracle and/or its affiliates. All rights reserved.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/types.h>
#include <grub/err.h>
#include <grub/i386/relocator.h>
#include <grub/relocator_private.h>
extern grub_uint64_t grub_relocator64_rax;
extern grub_uint64_t grub_relocator64_rbx;
extern grub_uint64_t grub_relocator64_rcx;
extern grub_uint64_t grub_relocator64_rdx;
extern grub_uint64_t grub_relocator64_rip;
extern grub_uint64_t grub_relocator64_rsi;
extern grub_uint8_t grub_relocator64_efi_start;
extern grub_uint8_t grub_relocator64_efi_end;
#define RELOCATOR_SIZEOF(x) (&grub_relocator##x##_end - &grub_relocator##x##_start)
grub_err_t
grub_relocator64_efi_boot (struct grub_relocator *rel,
struct grub_relocator64_efi_state state)
{
grub_err_t err;
void *relst;
grub_relocator_chunk_t ch;
/*
* 64-bit relocator code may live above 4 GiB quite well.
* However, I do not want ask for problems. Just in case.
*/
err = grub_relocator_alloc_chunk_align_safe (rel, &ch, 0, 0x100000000,
RELOCATOR_SIZEOF (64_efi), 16,
GRUB_RELOCATOR_PREFERENCE_NONE, 1);
if (err)
return err;
/* Do not touch %rsp! It points to EFI created stack. */
grub_relocator64_rax = state.rax;
grub_relocator64_rbx = state.rbx;
grub_relocator64_rcx = state.rcx;
grub_relocator64_rdx = state.rdx;
grub_relocator64_rip = state.rip;
grub_relocator64_rsi = state.rsi;
grub_memmove (get_virtual_current_address (ch), &grub_relocator64_efi_start,
RELOCATOR_SIZEOF (64_efi));
err = grub_relocator_prepare_relocs (rel, get_physical_target_address (ch),
&relst, NULL);
if (err)
return err;
((void (*) (void)) relst) ();
/* Not reached. */
return GRUB_ERR_NONE;
}
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