1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Clang Control Flow Integrity (CFI) type definitions. 4 */ 5#ifndef _LINUX_CFI_TYPES_H 6#define _LINUX_CFI_TYPES_H 7 8#ifdef __ASSEMBLY__ 9#include <linux/linkage.h> 10 11#ifdef CONFIG_CFI_CLANG 12/* 13 * Use the __kcfi_typeid_<function> type identifier symbol to 14 * annotate indirectly called assembly functions. The compiler emits 15 * these symbols for all address-taken function declarations in C 16 * code. 17 */ 18#ifndef __CFI_TYPE 19#define __CFI_TYPE(name) \ 20 .4byte __kcfi_typeid_##name 21#endif 22 23#define SYM_TYPED_ENTRY(name, linkage, align...) \ 24 linkage(name) ASM_NL \ 25 align ASM_NL \ 26 __CFI_TYPE(name) ASM_NL \ 27 name: 28 29#define SYM_TYPED_START(name, linkage, align...) \ 30 SYM_TYPED_ENTRY(name, linkage, align) 31 32#else /* CONFIG_CFI_CLANG */ 33 34#define SYM_TYPED_START(name, linkage, align...) \ 35 SYM_START(name, linkage, align) 36 37#endif /* CONFIG_CFI_CLANG */ 38 39#ifndef SYM_TYPED_FUNC_START 40#define SYM_TYPED_FUNC_START(name) \ 41 SYM_TYPED_START(name, SYM_L_GLOBAL, SYM_A_ALIGN) 42#endif 43 44#endif /* __ASSEMBLY__ */ 45#endif /* _LINUX_CFI_TYPES_H */ 46