arch/x86/include/asm/kasan.h

   1 #ifndef _ASM_X86_KASAN_H
   2 #define _ASM_X86_KASAN_H
   3
   4 #include <linux/const.h>
   5 #define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
   6
   7 /*
   8  * Compiler uses shadow offset assuming that addresses start
   9  * from 0. Kernel addresses don't start from 0, so shadow
  10  * for kernel really starts from compiler's shadow offset +
  11  * 'kernel address space start' >> KASAN_SHADOW_SCALE_SHIFT
  12  */
  13 #define KASAN_SHADOW_START      (KASAN_SHADOW_OFFSET + \
  14                                         ((-1UL << __VIRTUAL_MASK_SHIFT) >> 3))
  15 /*
  16  * 47 bits for kernel address -> (47 - 3) bits for shadow
  17  * 56 bits for kernel address -> (56 - 3) bits for shadow
  18  */
  19 #define KASAN_SHADOW_END        (KASAN_SHADOW_START + (1ULL << (__VIRTUAL_MASK_SHIFT - 3)))
  20
  21 #ifndef __ASSEMBLY__
  22
  23 #ifdef CONFIG_KASAN
  24 void __init kasan_early_init(void);
  25 void __init kasan_init(void);
  26 #else
  27 static inline void kasan_early_init(void) { }
  28 static inline void kasan_init(void) { }
  29 #endif
  30
  31 #endif
  32
  33 #endif