mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-17 01:34:00 +08:00
d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
39 lines
814 B
ArmAsm
39 lines
814 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
ENTRY(__efi_rt_asm_wrapper)
|
|
stp x29, x30, [sp, #-32]!
|
|
mov x29, sp
|
|
|
|
/*
|
|
* Register x18 is designated as the 'platform' register by the AAPCS,
|
|
* which means firmware running at the same exception level as the OS
|
|
* (such as UEFI) should never touch it.
|
|
*/
|
|
stp x1, x18, [sp, #16]
|
|
|
|
/*
|
|
* We are lucky enough that no EFI runtime services take more than
|
|
* 5 arguments, so all are passed in registers rather than via the
|
|
* stack.
|
|
*/
|
|
mov x8, x0
|
|
mov x0, x2
|
|
mov x1, x3
|
|
mov x2, x4
|
|
mov x3, x5
|
|
mov x4, x6
|
|
blr x8
|
|
|
|
ldp x1, x2, [sp, #16]
|
|
cmp x2, x18
|
|
ldp x29, x30, [sp], #32
|
|
b.ne 0f
|
|
ret
|
|
0: b efi_handle_corrupted_x18 // tail call
|
|
ENDPROC(__efi_rt_asm_wrapper)
|