| #ifndef __ASM_KASAN_H |
| #define __ASM_KASAN_H |
| |
| #ifndef __ASSEMBLY__ |
| |
| #ifdef CONFIG_KASAN |
| |
| #include <linux/linkage.h> |
| #include <asm/memory.h> |
| |
| #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x)) |
| #define PAGE_KERNEL_RO _MOD_PROT(pgprot_kernel, L_PTE_RDONLY) |
| |
| /* |
| * KASAN_SHADOW_START: beginning of the kernel virtual addresses. |
| * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/8 of kernel virtual addresses. |
| * |
| * For 32bit KASAN, we using a fixed Memory map here |
| * |
| * 0x00000000 +--------+ |
| * | | |
| * | | |
| * | | User space memory, 2944MB |
| * | | |
| * | | |
| * 0xb8000000 +--------+ |
| * | | Kasan shaddow memory, 128MB |
| * 0xc0000000 +--------+ |
| * | | |
| * | | Vmalloc address, 240MB |
| * | | |
| * 0xCF400000 +--------+ |
| * 0xCF600000 +--------+ PKmap, for kmap 2MB |
| * 0xD0000000 +--------+ Module and pkmap, 10MB |
| * | | |
| * | | Kernel linear mapped space, 762MB |
| * | | |
| * 0xFFa00000 +--------+ |
| * 0xFFFc0000 +--------+ static map, 2MB |
| * 0xFFF00000 +--------+ Fixed map, for kmap_atomic, 3MB |
| * 0xFFFF0000 +--------+ High vector, 4KB |
| * |
| */ |
| #define KADDR_SIZE (SZ_1G) |
| #define KASAN_SHADOW_SIZE (KADDR_SIZE >> 3) |
| #define KASAN_SHADOW_START (TASK_SIZE) |
| #define KASAN_SHADOW_END (KASAN_SHADOW_START + KASAN_SHADOW_SIZE) |
| |
| /* |
| * This value is used to map an address to the corresponding shadow |
| * address by the following formula: |
| * shadow_addr = (address >> 3) + KASAN_SHADOW_OFFSET; |
| * |
| */ |
| #define KASAN_SHADOW_OFFSET (KASAN_SHADOW_START - (VMALLOC_START >> 3)) |
| struct map_desc; |
| void kasan_init(void); |
| void kasan_copy_shadow(pgd_t *pgdir); |
| asmlinkage void kasan_early_init(void); |
| void cpu_v7_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext); |
| void create_mapping(struct map_desc *md); |
| #ifdef CONFIG_AMLOGIC_VMAP |
| void clear_pgds(unsigned long start, unsigned long end); |
| #endif |
| #else |
| static inline void kasan_init(void) { } |
| static inline void kasan_copy_shadow(pgd_t *pgdir) { } |
| #endif |
| |
| #endif |
| #endif |
