140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
/* 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 */
|