129 lines
2.5 KiB
ArmAsm
129 lines
2.5 KiB
ArmAsm
/* callwrap.S - wrapper for x86_64 efi calls */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2006,2007,2009 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/>.
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <grub/symbol.h>
|
|
|
|
/*
|
|
* x86_64 uses registry to pass parameters. Unfortunately, gcc and efi use
|
|
* different call conversion, so we need to do some conversion.
|
|
*
|
|
* gcc:
|
|
* %rdi, %rsi, %rdx, %rcx, %r8, %r9, 8(%rsp), 16(%rsp), ...
|
|
*
|
|
* efi:
|
|
* %rcx, %rdx, %r8, %r9, 32(%rsp), 40(%rsp), 48(%rsp), ...
|
|
*
|
|
*/
|
|
|
|
.file "callwrap.S"
|
|
.text
|
|
|
|
FUNCTION(efi_wrap_0)
|
|
subq $48, %rsp
|
|
call *%rdi
|
|
addq $48, %rsp
|
|
ret
|
|
|
|
FUNCTION(efi_wrap_1)
|
|
subq $48, %rsp
|
|
mov %rsi, %rcx
|
|
call *%rdi
|
|
addq $48, %rsp
|
|
ret
|
|
|
|
FUNCTION(efi_wrap_2)
|
|
subq $48, %rsp
|
|
mov %rsi, %rcx
|
|
call *%rdi
|
|
addq $48, %rsp
|
|
ret
|
|
|
|
FUNCTION(efi_wrap_3)
|
|
subq $48, %rsp
|
|
mov %rcx, %r8
|
|
mov %rsi, %rcx
|
|
call *%rdi
|
|
addq $48, %rsp
|
|
ret
|
|
|
|
FUNCTION(efi_wrap_4)
|
|
subq $48, %rsp
|
|
mov %r8, %r9
|
|
mov %rcx, %r8
|
|
mov %rsi, %rcx
|
|
call *%rdi
|
|
addq $48, %rsp
|
|
ret
|
|
|
|
FUNCTION(efi_wrap_5)
|
|
subq $48, %rsp
|
|
mov %r9, 32(%rsp)
|
|
mov %r8, %r9
|
|
mov %rcx, %r8
|
|
mov %rsi, %rcx
|
|
call *%rdi
|
|
addq $48, %rsp
|
|
ret
|
|
|
|
FUNCTION(efi_wrap_6)
|
|
subq $64, %rsp
|
|
mov 64+8(%rsp), %rax
|
|
mov %rax, 40(%rsp)
|
|
mov %r9, 32(%rsp)
|
|
mov %r8, %r9
|
|
mov %rcx, %r8
|
|
mov %rsi, %rcx
|
|
call *%rdi
|
|
addq $64, %rsp
|
|
ret
|
|
|
|
FUNCTION(efi_wrap_7)
|
|
subq $96, %rsp
|
|
mov 96+16(%rsp), %rax
|
|
mov %rax, 48(%rsp)
|
|
mov 96+8(%rsp), %rax
|
|
mov %rax, 40(%rsp)
|
|
mov %r9, 32(%rsp)
|
|
mov %r8, %r9
|
|
mov %rcx, %r8
|
|
mov %rsi, %rcx
|
|
call *%rdi
|
|
addq $96, %rsp
|
|
ret
|
|
|
|
FUNCTION(efi_wrap_10)
|
|
subq $96, %rsp
|
|
mov 96+40(%rsp), %rax
|
|
mov %rax, 72(%rsp)
|
|
mov 96+32(%rsp), %rax
|
|
mov %rax, 64(%rsp)
|
|
mov 96+24(%rsp), %rax
|
|
mov %rax, 56(%rsp)
|
|
mov 96+16(%rsp), %rax
|
|
mov %rax, 48(%rsp)
|
|
mov 96+8(%rsp), %rax
|
|
mov %rax, 40(%rsp)
|
|
mov %r9, 32(%rsp)
|
|
mov %r8, %r9
|
|
mov %rcx, %r8
|
|
mov %rsi, %rcx
|
|
call *%rdi
|
|
addq $96, %rsp
|
|
ret
|