grub2/include/grub/i386/multiboot.h
Daniel Kiper 9862b24121 i386/relocator: Add grub_relocator64_efi relocator
Add grub_relocator64_efi relocator. It will be used on EFI 64-bit platforms
when multiboot2 compatible image requests MULTIBOOT_TAG_TYPE_EFI_BS. Relocator
will set lower parts of %rax and %rbx accordingly to multiboot2 specification.
On the other hand processor mode, just before jumping into loaded image, will
be set accordingly to Unified Extensible Firmware Interface Specification,
Version 2.4 Errata B, section 2.3.4, x64 Platforms, boot services. This way
loaded image will be able to use EFI boot services without any issues.

Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
2016-10-27 15:53:43 +02:00

48 lines
1.6 KiB
C

/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2003,2004,2007,2008,2009 Free Software Foundation, Inc.
*
* 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/>.
*/
#ifndef GRUB_MULTIBOOT_CPU_HEADER
#define GRUB_MULTIBOOT_CPU_HEADER 1
#define MULTIBOOT_INITIAL_STATE { .eax = MULTIBOOT_BOOTLOADER_MAGIC, \
.ecx = 0, \
.edx = 0, \
/* Set esp to some random location in low memory to avoid breaking */ \
/* non-compliant kernels. */ \
.esp = 0x7ff00 \
}
#define MULTIBOOT_ENTRY_REGISTER eip
#define MULTIBOOT_MBI_REGISTER ebx
#define MULTIBOOT_ARCHITECTURE_CURRENT MULTIBOOT_ARCHITECTURE_I386
#ifdef GRUB_MACHINE_EFI
#ifdef __x86_64__
#define MULTIBOOT_EFI_INITIAL_STATE { .rax = MULTIBOOT_BOOTLOADER_MAGIC, \
.rcx = 0, \
.rdx = 0, \
}
#define MULTIBOOT_EFI_ENTRY_REGISTER rip
#define MULTIBOOT_EFI_MBI_REGISTER rbx
#endif
#endif
#define MULTIBOOT_ELF32_MACHINE EM_386
#define MULTIBOOT_ELF64_MACHINE EM_X86_64
#endif /* ! GRUB_MULTIBOOT_CPU_HEADER */