blob: aa6588050752bc075b1ee938f2a47b90ccd701a3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
|
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2020 ARM Limited */
.global pac_corruptor
.text
/*
* Corrupting a single bit of the PAC ensures the authentication will fail. It
* also guarantees no possible collision. TCR_EL1.TBI0 is set by default so no
* top byte PAC is tested
*/
pac_corruptor:
paciasp
/* corrupt the top bit of the PAC */
eor lr, lr, #1 << 53
autiasp
ret
|