/* 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 */