| /* 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 |