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0b24becc AR |
1 | #ifndef _LINUX_KASAN_H |
2 | #define _LINUX_KASAN_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | ||
6 | struct kmem_cache; | |
7 | struct page; | |
a5af5aa8 | 8 | struct vm_struct; |
0b24becc AR |
9 | |
10 | #ifdef CONFIG_KASAN | |
11 | ||
12 | #define KASAN_SHADOW_SCALE_SHIFT 3 | |
0b24becc AR |
13 | |
14 | #include <asm/kasan.h> | |
69786cdb | 15 | #include <asm/pgtable.h> |
0b24becc AR |
16 | #include <linux/sched.h> |
17 | ||
69786cdb AR |
18 | extern unsigned char kasan_zero_page[PAGE_SIZE]; |
19 | extern pte_t kasan_zero_pte[PTRS_PER_PTE]; | |
20 | extern pmd_t kasan_zero_pmd[PTRS_PER_PMD]; | |
21 | extern pud_t kasan_zero_pud[PTRS_PER_PUD]; | |
22 | ||
23 | void kasan_populate_zero_shadow(const void *shadow_start, | |
24 | const void *shadow_end); | |
25 | ||
0b24becc AR |
26 | static inline void *kasan_mem_to_shadow(const void *addr) |
27 | { | |
28 | return (void *)((unsigned long)addr >> KASAN_SHADOW_SCALE_SHIFT) | |
29 | + KASAN_SHADOW_OFFSET; | |
30 | } | |
31 | ||
32 | /* Enable reporting bugs after kasan_disable_current() */ | |
33 | static inline void kasan_enable_current(void) | |
34 | { | |
35 | current->kasan_depth++; | |
36 | } | |
37 | ||
38 | /* Disable reporting bugs for current task */ | |
39 | static inline void kasan_disable_current(void) | |
40 | { | |
41 | current->kasan_depth--; | |
42 | } | |
43 | ||
44 | void kasan_unpoison_shadow(const void *address, size_t size); | |
45 | ||
b8c73fc2 AR |
46 | void kasan_alloc_pages(struct page *page, unsigned int order); |
47 | void kasan_free_pages(struct page *page, unsigned int order); | |
48 | ||
0316bec2 AR |
49 | void kasan_poison_slab(struct page *page); |
50 | void kasan_unpoison_object_data(struct kmem_cache *cache, void *object); | |
51 | void kasan_poison_object_data(struct kmem_cache *cache, void *object); | |
52 | ||
53 | void kasan_kmalloc_large(const void *ptr, size_t size); | |
54 | void kasan_kfree_large(const void *ptr); | |
92393615 | 55 | void kasan_kfree(void *ptr); |
0316bec2 AR |
56 | void kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size); |
57 | void kasan_krealloc(const void *object, size_t new_size); | |
58 | ||
59 | void kasan_slab_alloc(struct kmem_cache *s, void *object); | |
60 | void kasan_slab_free(struct kmem_cache *s, void *object); | |
61 | ||
bebf56a1 | 62 | int kasan_module_alloc(void *addr, size_t size); |
a5af5aa8 | 63 | void kasan_free_shadow(const struct vm_struct *vm); |
bebf56a1 | 64 | |
0b24becc AR |
65 | #else /* CONFIG_KASAN */ |
66 | ||
67 | static inline void kasan_unpoison_shadow(const void *address, size_t size) {} | |
68 | ||
69 | static inline void kasan_enable_current(void) {} | |
70 | static inline void kasan_disable_current(void) {} | |
71 | ||
b8c73fc2 AR |
72 | static inline void kasan_alloc_pages(struct page *page, unsigned int order) {} |
73 | static inline void kasan_free_pages(struct page *page, unsigned int order) {} | |
74 | ||
0316bec2 AR |
75 | static inline void kasan_poison_slab(struct page *page) {} |
76 | static inline void kasan_unpoison_object_data(struct kmem_cache *cache, | |
77 | void *object) {} | |
78 | static inline void kasan_poison_object_data(struct kmem_cache *cache, | |
79 | void *object) {} | |
80 | ||
81 | static inline void kasan_kmalloc_large(void *ptr, size_t size) {} | |
82 | static inline void kasan_kfree_large(const void *ptr) {} | |
92393615 | 83 | static inline void kasan_kfree(void *ptr) {} |
0316bec2 AR |
84 | static inline void kasan_kmalloc(struct kmem_cache *s, const void *object, |
85 | size_t size) {} | |
86 | static inline void kasan_krealloc(const void *object, size_t new_size) {} | |
87 | ||
88 | static inline void kasan_slab_alloc(struct kmem_cache *s, void *object) {} | |
89 | static inline void kasan_slab_free(struct kmem_cache *s, void *object) {} | |
90 | ||
bebf56a1 | 91 | static inline int kasan_module_alloc(void *addr, size_t size) { return 0; } |
a5af5aa8 | 92 | static inline void kasan_free_shadow(const struct vm_struct *vm) {} |
bebf56a1 | 93 | |
0b24becc AR |
94 | #endif /* CONFIG_KASAN */ |
95 | ||
96 | #endif /* LINUX_KASAN_H */ |