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 11 /* 12 * KASAN_SHADOW_START: beginning of the kernel virtual addresses. 13 * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/8 of kernel virtual addresses. 14 */ 15 #define KASAN_SHADOW_START (VA_START) 16 #define KASAN_SHADOW_END (KASAN_SHADOW_START + (1UL << (VA_BITS - 3))) 17 18 /* 19 * This value is used to map an address to the corresponding shadow 20 * address by the following formula: 21 * shadow_addr = (address >> 3) + KASAN_SHADOW_OFFSET; 22 * 23 * (1 << 61) shadow addresses - [KASAN_SHADOW_OFFSET,KASAN_SHADOW_END] 24 * cover all 64-bits of virtual addresses. So KASAN_SHADOW_OFFSET 25 * should satisfy the following equation: 26 * KASAN_SHADOW_OFFSET = KASAN_SHADOW_END - (1ULL << 61) 27 */ 28 #define KASAN_SHADOW_OFFSET (KASAN_SHADOW_END - (1ULL << (64 - 3))) 29 30 void kasan_init(void); 31 asmlinkage void kasan_early_init(void); 32 33 #else 34 static inline void kasan_init(void) { } 35 #endif 36 37 #endif 38 #endif 39