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