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- /* SPDX-License-Identifier: GPL-2.0 */
- /*
- * Clang Control Flow Integrity (CFI) support.
- *
- * Copyright (C) 2022 Google LLC
- */
- #ifndef _LINUX_CFI_H
- #define _LINUX_CFI_H
- #include <linux/bug.h>
- #include <linux/module.h>
- #ifdef CONFIG_CFI_CLANG
- enum bug_trap_type report_cfi_failure(struct pt_regs *regs, unsigned long addr,
- unsigned long *target, u32 type);
- static inline enum bug_trap_type report_cfi_failure_noaddr(struct pt_regs *regs,
- unsigned long addr)
- {
- return report_cfi_failure(regs, addr, NULL, 0);
- }
- #ifdef CONFIG_ARCH_USES_CFI_TRAPS
- bool is_cfi_trap(unsigned long addr);
- #endif
- #endif /* CONFIG_CFI_CLANG */
- #ifdef CONFIG_MODULES
- #ifdef CONFIG_ARCH_USES_CFI_TRAPS
- void module_cfi_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
- struct module *mod);
- #else
- static inline void module_cfi_finalize(const Elf_Ehdr *hdr,
- const Elf_Shdr *sechdrs,
- struct module *mod) {}
- #endif /* CONFIG_ARCH_USES_CFI_TRAPS */
- #endif /* CONFIG_MODULES */
- #endif /* _LINUX_CFI_H */
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