1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_COMPILER_H 3 #define __ASM_COMPILER_H 4 5 /* 6 * The EL0/EL1 pointer bits used by a pointer authentication code. 7 * This is dependent on TBI0/TBI1 being enabled, or bits 63:56 would also apply. 8 */ 9 #define ptrauth_user_pac_mask() GENMASK_ULL(54, vabits_actual) 10 #define ptrauth_kernel_pac_mask() GENMASK_ULL(63, vabits_actual) 11 12 /* Valid for EL0 TTBR0 and EL1 TTBR1 instruction pointers */ 13 #define ptrauth_clear_pac(ptr) \ 14 ((ptr & BIT_ULL(55)) ? (ptr | ptrauth_kernel_pac_mask()) : \ 15 (ptr & ~ptrauth_user_pac_mask())) 16 17 #define __builtin_return_address(val) \ 18 (void *)(ptrauth_clear_pac((unsigned long)__builtin_return_address(val))) 19 20 #endif /* __ASM_COMPILER_H */ 21