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Last change
on this file since 105670 was 105670, checked in by vboxsync, 7 months ago |
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Devices/EFI/FirmwareNew: Merge edk2-stable-202405 and make it build on aarch64, bugref:4643
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-
Property svn:eol-style
set to
native
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Property svn:mime-type
set to
text/x-asm
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File size:
792 bytes
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| 1 | ;------------------------------------------------------------------------------ ;
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| 2 | ; Copyright (c) 2019 - 2023, Intel Corporation. All rights reserved.<BR>
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| 3 | ; SPDX-License-Identifier: BSD-2-Clause-Patent
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| 4 | ;
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| 5 | ;-------------------------------------------------------------------------------
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| 6 |
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| 7 | %include "Nasm.inc"
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| 8 | %include "Cet.inc"
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| 9 |
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| 10 | DEFAULT REL
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| 11 | SECTION .text
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| 12 |
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| 13 | global ASM_PFX(DisableCet)
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| 14 | ASM_PFX(DisableCet):
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| 15 |
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| 16 | ; Skip the pushed data for call
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| 17 | mov rax, 1
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| 18 | incsspq rax
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| 19 |
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| 20 | mov rax, cr4
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| 21 | btr eax, CR4_CET_BIT ; clear CET
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| 22 | mov cr4, rax
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| 23 | ret
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| 24 |
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| 25 | global ASM_PFX(EnableCet)
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| 26 | ASM_PFX(EnableCet):
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| 27 |
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| 28 | mov rax, cr4
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| 29 | bts eax, CR4_CET_BIT ; set CET
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| 30 | mov cr4, rax
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| 31 |
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| 32 | ; use jmp to skip the check for ret
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| 33 | pop rax
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| 34 | jmp rax
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| 35 |
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