fa0cd620e3
Change-Id: Iff956ce7c2b89d3a442b0b81deba0da323f5d18b Signed-off-by: Alexander Winkowski <dereference23@outlook.com>
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Clang Control Flow Integrity (CFI) support.
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*
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* Copyright (C) 2019 Google LLC
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*/
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#ifndef _LINUX_CFI_H
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#define _LINUX_CFI_H
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#include <linux/stringify.h>
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#ifdef CONFIG_CFI_CLANG
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#ifdef CONFIG_MODULES
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typedef void (*cfi_check_fn)(uint64_t id, void *ptr, void *diag);
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/* Compiler-generated function in each module, and the kernel */
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#define CFI_CHECK_FN __cfi_check
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#define CFI_CHECK_FN_NAME __stringify(CFI_CHECK_FN)
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extern void CFI_CHECK_FN(uint64_t id, void *ptr, void *diag);
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#ifdef CONFIG_CFI_CLANG_SHADOW
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extern void cfi_module_add(struct module *mod, unsigned long min_addr,
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unsigned long max_addr);
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extern void cfi_module_remove(struct module *mod, unsigned long min_addr,
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unsigned long max_addr);
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#else
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static inline void cfi_module_add(struct module *mod, unsigned long min_addr,
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unsigned long max_addr)
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{
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}
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static inline void cfi_module_remove(struct module *mod, unsigned long min_addr,
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unsigned long max_addr)
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{
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}
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#endif /* CONFIG_CFI_CLANG_SHADOW */
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#endif /* CONFIG_MODULES */
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#endif /* CONFIG_CFI_CLANG */
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#endif /* _LINUX_CFI_H */
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