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;------------------------------------------------------------------------------ ;
; Copyright (c) 2019 - 2023, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
;-------------------------------------------------------------------------------
%include "Nasm.inc"
%include "Cet.inc"
DEFAULT REL
SECTION .text
global ASM_PFX(DisableCet)
ASM_PFX(DisableCet):
; Skip the pushed data for call
mov rax, 1
incsspq rax
mov rax, cr4
btr eax, CR4_CET_BIT ; clear CET
mov cr4, rax
ret
global ASM_PFX(EnableCet)
ASM_PFX(EnableCet):
mov rax, cr4
bts eax, CR4_CET_BIT ; set CET
mov cr4, rax
; use jmp to skip the check for ret
pop rax
jmp rax
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