110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* This header provides generic wrappers for memory access instrumentation that
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* the compiler cannot emit for: KASAN, KCSAN.
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*/
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#ifndef _LINUX_INSTRUMENTED_H
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#define _LINUX_INSTRUMENTED_H
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#include <linux/compiler.h>
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#include <linux/kasan-checks.h>
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#include <linux/kcsan-checks.h>
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#include <linux/types.h>
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/**
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* instrument_read - instrument regular read access
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*
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* Instrument a regular read access. The instrumentation should be inserted
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* before the actual read happens.
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*
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* @ptr address of access
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* @size size of access
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*/
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static __always_inline void instrument_read(const volatile void *v, size_t size)
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{
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kasan_check_read(v, size);
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kcsan_check_read(v, size);
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}
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/**
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* instrument_write - instrument regular write access
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*
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* Instrument a regular write access. The instrumentation should be inserted
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* before the actual write happens.
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*
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* @ptr address of access
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* @size size of access
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*/
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static __always_inline void instrument_write(const volatile void *v, size_t size)
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{
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kasan_check_write(v, size);
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kcsan_check_write(v, size);
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}
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/**
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* instrument_atomic_read - instrument atomic read access
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*
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* Instrument an atomic read access. The instrumentation should be inserted
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* before the actual read happens.
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*
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* @ptr address of access
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* @size size of access
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*/
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static __always_inline void instrument_atomic_read(const volatile void *v, size_t size)
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{
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kasan_check_read(v, size);
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kcsan_check_atomic_read(v, size);
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}
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/**
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* instrument_atomic_write - instrument atomic write access
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*
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* Instrument an atomic write access. The instrumentation should be inserted
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* before the actual write happens.
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*
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* @ptr address of access
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* @size size of access
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*/
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static __always_inline void instrument_atomic_write(const volatile void *v, size_t size)
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{
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kasan_check_write(v, size);
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kcsan_check_atomic_write(v, size);
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}
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/**
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* instrument_copy_to_user - instrument reads of copy_to_user
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*
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* Instrument reads from kernel memory, that are due to copy_to_user (and
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* variants). The instrumentation must be inserted before the accesses.
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*
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* @to destination address
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* @from source address
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* @n number of bytes to copy
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*/
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static __always_inline void
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instrument_copy_to_user(void __user *to, const void *from, unsigned long n)
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{
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kasan_check_read(from, n);
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kcsan_check_read(from, n);
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}
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/**
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* instrument_copy_from_user - instrument writes of copy_from_user
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*
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* Instrument writes to kernel memory, that are due to copy_from_user (and
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* variants). The instrumentation should be inserted before the accesses.
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*
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* @to destination address
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* @from source address
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* @n number of bytes to copy
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*/
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static __always_inline void
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instrument_copy_from_user(const void *to, const void __user *from, unsigned long n)
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{
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kasan_check_write(to, n);
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kcsan_check_write(to, n);
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}
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#endif /* _LINUX_INSTRUMENTED_H */
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