diff options
Diffstat (limited to 'include/linux/cfi.h')
| -rw-r--r-- | include/linux/cfi.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/include/linux/cfi.h b/include/linux/cfi.h new file mode 100644 index 000000000000..5e134f4ce8b7 --- /dev/null +++ b/include/linux/cfi.h @@ -0,0 +1,39 @@ +/* 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 */ |