/* SPDX-License-Identifier: GPL-2.0 */ /* * Clang Control Flow Integrity (CFI) type definitions. */ #ifndef _LINUX_CFI_TYPES_H #define _LINUX_CFI_TYPES_H #ifdef __ASSEMBLY__ #include <linux/linkage.h> #ifdef CONFIG_CFI_CLANG /* * Use the __kcfi_typeid_<function> type identifier symbol to * annotate indirectly called assembly functions. The compiler emits * these symbols for all address-taken function declarations in C * code. */ #ifndef __CFI_TYPE #define __CFI_TYPE(name) \ .4byte __kcfi_typeid_##name #endif #define SYM_TYPED_ENTRY(name, linkage, align...) \ linkage(name) ASM_NL \ align ASM_NL \ __CFI_TYPE(name) ASM_NL \ name: #define SYM_TYPED_START(name, linkage, align...) \ SYM_TYPED_ENTRY(name, linkage, align) #else /* CONFIG_CFI_CLANG */ #define SYM_TYPED_START(name, linkage, align...) \ SYM_START(name, linkage, align) #endif /* CONFIG_CFI_CLANG */ #ifndef SYM_TYPED_FUNC_START #define SYM_TYPED_FUNC_START(name) \ SYM_TYPED_START(name, SYM_L_GLOBAL, SYM_A_ALIGN) #endif #endif /* __ASSEMBLY__ */ #endif /* _LINUX_CFI_TYPES_H */