arch/x86/include/asm/kasan.h

   1 #ifndef _ASM_X86_KASAN_H
   2 #define _ASM_X86_KASAN_H
   3
   4 /*
   5  * Compiler uses shadow offset assuming that addresses start
   6  * from 0. Kernel addresses don't start from 0, so shadow
   7  * for kernel really starts from compiler's shadow offset +
   8  * 'kernel address space start' >> KASAN_SHADOW_SCALE_SHIFT
   9  */
  10 #define KASAN_SHADOW_START      (KASAN_SHADOW_OFFSET + \
  11                                         (0xffff800000000000ULL >> 3))
  12 /* 47 bits for kernel address -> (47 - 3) bits for shadow */
  13 #define KASAN_SHADOW_END        (KASAN_SHADOW_START + (1ULL << (47 - 3)))
  14
  15 #ifndef __ASSEMBLY__
  16
  17 extern pte_t kasan_zero_pte[];
  18 extern pte_t kasan_zero_pmd[];
  19 extern pte_t kasan_zero_pud[];
  20
  21 #ifdef CONFIG_KASAN
  22 void __init kasan_map_early_shadow(pgd_t *pgd);
  23 void __init kasan_init(void);
  24 #else
  25 static inline void kasan_map_early_shadow(pgd_t *pgd) { }
  26 static inline void kasan_init(void) { }
  27 #endif
  28
  29 #endif
  30
  31 #endif