18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef __ASM_COMPILER_H 38c2ecf20Sopenharmony_ci#define __ASM_COMPILER_H 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci#ifdef ARM64_ASM_ARCH 68c2ecf20Sopenharmony_ci#define ARM64_ASM_PREAMBLE ".arch " ARM64_ASM_ARCH "\n" 78c2ecf20Sopenharmony_ci#else 88c2ecf20Sopenharmony_ci#define ARM64_ASM_PREAMBLE 98c2ecf20Sopenharmony_ci#endif 108c2ecf20Sopenharmony_ci 118c2ecf20Sopenharmony_ci/* 128c2ecf20Sopenharmony_ci * The EL0/EL1 pointer bits used by a pointer authentication code. 138c2ecf20Sopenharmony_ci * This is dependent on TBI0/TBI1 being enabled, or bits 63:56 would also apply. 148c2ecf20Sopenharmony_ci */ 158c2ecf20Sopenharmony_ci#define ptrauth_user_pac_mask() GENMASK_ULL(54, vabits_actual) 168c2ecf20Sopenharmony_ci#define ptrauth_kernel_pac_mask() GENMASK_ULL(63, vabits_actual) 178c2ecf20Sopenharmony_ci 188c2ecf20Sopenharmony_ci/* Valid for EL0 TTBR0 and EL1 TTBR1 instruction pointers */ 198c2ecf20Sopenharmony_ci#define ptrauth_clear_pac(ptr) \ 208c2ecf20Sopenharmony_ci ((ptr & BIT_ULL(55)) ? (ptr | ptrauth_kernel_pac_mask()) : \ 218c2ecf20Sopenharmony_ci (ptr & ~ptrauth_user_pac_mask())) 228c2ecf20Sopenharmony_ci 238c2ecf20Sopenharmony_ci#define __builtin_return_address(val) \ 248c2ecf20Sopenharmony_ci (void *)(ptrauth_clear_pac((unsigned long)__builtin_return_address(val))) 258c2ecf20Sopenharmony_ci 268c2ecf20Sopenharmony_ci#endif /* __ASM_COMPILER_H */ 27