| /* |
| * 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 (rel, &ch, 0, |
| 0x100000000 - RELOCATOR_SIZEOF (64_efi), |
| 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; |
| } |