LXR linux/arch/arm64/include/asm/kasan.h

   1#ifndef __ASM_KASAN_H
   2#define __ASM_KASAN_H
   3
   4#ifndef __ASSEMBLY__
   5
   6#ifdef CONFIG_KASAN
   7
   8#include <linux/linkage.h>
   9#include <asm/memory.h>
  10#include <asm/pgtable-types.h>
  11
  12/*
  13 * KASAN_SHADOW_START: beginning of the kernel virtual addresses.
  14 * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/8 of kernel virtual addresses.
  15 */
  16#define KASAN_SHADOW_START      (VA_START)
  17#define KASAN_SHADOW_END        (KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
  18
  19/*
  20 * This value is used to map an address to the corresponding shadow
  21 * address by the following formula:
  22 *     shadow_addr = (address >> 3) + KASAN_SHADOW_OFFSET;
  23 *
  24 * (1 << 61) shadow addresses - [KASAN_SHADOW_OFFSET,KASAN_SHADOW_END]
  25 * cover all 64-bits of virtual addresses. So KASAN_SHADOW_OFFSET
  26 * should satisfy the following equation:
  27 *      KASAN_SHADOW_OFFSET = KASAN_SHADOW_END - (1ULL << 61)
  28 */
  29#define KASAN_SHADOW_OFFSET     (KASAN_SHADOW_END - (1ULL << (64 - 3)))
  30
  31void kasan_init(void);
  32void kasan_copy_shadow(pgd_t *pgdir);
  33asmlinkage void kasan_early_init(void);
  34
  35#else
  36static inline void kasan_init(void) { }
  37static inline void kasan_copy_shadow(pgd_t *pgdir) { }
  38#endif
  39
  40#endif
  41#endif
  42