tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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