arch/arm/include/asm/kasan.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * arch/arm/include/asm/kasan.h
   4  *
   5  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
   6  * Author: Andrey Ryabinin <ryabinin.a.a@gmail.com>
   7  *
   8  */
   9
  10 #ifndef __ASM_KASAN_H
  11 #define __ASM_KASAN_H
  12
  13 #ifdef CONFIG_KASAN
  14
  15 #include <asm/kasan_def.h>
  16
  17 #define KASAN_SHADOW_SCALE_SHIFT 3
  18
  19 /*
  20  * The compiler uses a shadow offset assuming that addresses start
  21  * from 0. Kernel addresses don't start from 0, so shadow
  22  * for kernel really starts from 'compiler's shadow offset' +
  23  * ('kernel address space start' >> KASAN_SHADOW_SCALE_SHIFT)
  24  */
  25
  26 asmlinkage void kasan_early_init(void);
  27 extern void kasan_init(void);
  28
  29 #else
  30 static inline void kasan_init(void) { }
  31 #endif
  32
  33 #endif