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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Clang Control Flow Integrity (CFI) type definitions.4 */5#ifndef _LINUX_CFI_TYPES_H6#define _LINUX_CFI_TYPES_H7 8#ifdef __ASSEMBLY__9#include <linux/linkage.h>10 11#ifdef CONFIG_CFI_CLANG12/*13 * Use the __kcfi_typeid_<function> type identifier symbol to14 * annotate indirectly called assembly functions. The compiler emits15 * these symbols for all address-taken function declarations in C16 * code.17 */18#ifndef __CFI_TYPE19#define __CFI_TYPE(name) \20 .4byte __kcfi_typeid_##name21#endif22 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_START40#define SYM_TYPED_FUNC_START(name) \41 SYM_TYPED_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)42#endif43 44#endif /* __ASSEMBLY__ */45#endif /* _LINUX_CFI_TYPES_H */46