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