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
|
|
