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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869/* 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/* * 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 */
#define SYM_TYPED_START(name, linkage, align...) \ SYM_START(name, linkage, align)
#endif /* CONFIG_CFI */
#ifndef SYM_TYPED_FUNC_START#define SYM_TYPED_FUNC_START(name) \ SYM_TYPED_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)#endif
#else /* __ASSEMBLY__ */
#ifdef CONFIG_CFI#define DEFINE_CFI_TYPE(name, func) \ /* \ * Force a reference to the function so the compiler generates \ * __kcfi_typeid_<func>. \ */ \ __ADDRESSABLE(func); \ /* u32 name __ro_after_init = __kcfi_typeid_<func> */ \ extern u32 name; \ asm ( \ " .pushsection .data..ro_after_init,\"aw\",\%progbits \n" \ " .type " #name ",\%object \n" \ " .globl " #name " \n" \ " .p2align 2, 0x0 \n" \ #name ": \n" \ " .4byte __kcfi_typeid_" #func " \n" \ " .size " #name ", 4 \n" \ " .popsection \n" \ );#endif
#endif /* __ASSEMBLY__ */#endif /* _LINUX_CFI_TYPES_H */