| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __ASM_COMPILER_H |
| #define __ASM_COMPILER_H |
| |
| /* |
| * The EL0/EL1 pointer bits used by a pointer authentication code. |
| * This is dependent on TBI0/TBI1 being enabled, or bits 63:56 would also apply. |
| */ |
| #define ptrauth_user_pac_mask() GENMASK_ULL(54, vabits_actual) |
| #define ptrauth_kernel_pac_mask() GENMASK_ULL(63, vabits_actual) |
| |
| /* Valid for EL0 TTBR0 and EL1 TTBR1 instruction pointers */ |
| #define ptrauth_clear_pac(ptr) \ |
| ((ptr & BIT_ULL(55)) ? (ptr | ptrauth_kernel_pac_mask()) : \ |
| (ptr & ~ptrauth_user_pac_mask())) |
| |
| #define __builtin_return_address(val) \ |
| (void *)(ptrauth_clear_pac((unsigned long)__builtin_return_address(val))) |
| |
| #endif /* __ASM_COMPILER_H */ |
