[deliverable/linux.git] / include / linux / kasan.h

#ifndef _LINUX_KASAN_H
#define _LINUX_KASAN_H

#include <linux/types.h>

struct kmem_cache;
struct page;

#ifdef CONFIG_KASAN

#define KASAN_SHADOW_SCALE_SHIFT 3
#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)

#include <asm/kasan.h>
#include <linux/sched.h>

static inline void *kasan_mem_to_shadow(const void *addr)
{
	return (void *)((unsigned long)addr >> KASAN_SHADOW_SCALE_SHIFT)
		+ KASAN_SHADOW_OFFSET;
}

/* Enable reporting bugs after kasan_disable_current() */
static inline void kasan_enable_current(void)
{
	current->kasan_depth++;
}

/* Disable reporting bugs for current task */
static inline void kasan_disable_current(void)
{
	current->kasan_depth--;
}

void kasan_unpoison_shadow(const void *address, size_t size);

void kasan_alloc_pages(struct page *page, unsigned int order);
void kasan_free_pages(struct page *page, unsigned int order);

void kasan_poison_slab(struct page *page);
void kasan_unpoison_object_data(struct kmem_cache *cache, void *object);
void kasan_poison_object_data(struct kmem_cache *cache, void *object);

void kasan_kmalloc_large(const void *ptr, size_t size);
void kasan_kfree_large(const void *ptr);
void kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size);
void kasan_krealloc(const void *object, size_t new_size);

void kasan_slab_alloc(struct kmem_cache *s, void *object);
void kasan_slab_free(struct kmem_cache *s, void *object);

#define MODULE_ALIGN (PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT)

int kasan_module_alloc(void *addr, size_t size);
void kasan_module_free(void *addr);

#else /* CONFIG_KASAN */

#define MODULE_ALIGN 1

static inline void kasan_unpoison_shadow(const void *address, size_t size) {}

static inline void kasan_enable_current(void) {}
static inline void kasan_disable_current(void) {}

static inline void kasan_alloc_pages(struct page *page, unsigned int order) {}
static inline void kasan_free_pages(struct page *page, unsigned int order) {}

static inline void kasan_poison_slab(struct page *page) {}
static inline void kasan_unpoison_object_data(struct kmem_cache *cache,
					void *object) {}
static inline void kasan_poison_object_data(struct kmem_cache *cache,
					void *object) {}

static inline void kasan_kmalloc_large(void *ptr, size_t size) {}
static inline void kasan_kfree_large(const void *ptr) {}
static inline void kasan_kmalloc(struct kmem_cache *s, const void *object,
				size_t size) {}
static inline void kasan_krealloc(const void *object, size_t new_size) {}

static inline void kasan_slab_alloc(struct kmem_cache *s, void *object) {}
static inline void kasan_slab_free(struct kmem_cache *s, void *object) {}

static inline int kasan_module_alloc(void *addr, size_t size) { return 0; }
static inline void kasan_module_free(void *addr) {}

#endif /* CONFIG_KASAN */

#endif /* LINUX_KASAN_H */
Commit	Line	Data
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;
	8
	9	#ifdef CONFIG_KASAN
	10
	11	#define KASAN_SHADOW_SCALE_SHIFT 3
	12	#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
	13
	14	#include <asm/kasan.h>
	15	#include <linux/sched.h>
	16
	17	static inline void kasan_mem_to_shadow(const void addr)
	18	{
	19	return (void *)((unsigned long)addr >> KASAN_SHADOW_SCALE_SHIFT)
	20	+ KASAN_SHADOW_OFFSET;
	21	}
	22
	23	/* Enable reporting bugs after kasan_disable_current() */
	24	static inline void kasan_enable_current(void)
	25	{
	26	current->kasan_depth++;
	27	}
	28
	29	/* Disable reporting bugs for current task */
	30	static inline void kasan_disable_current(void)
	31	{
	32	current->kasan_depth--;
	33	}
	34
	35	void kasan_unpoison_shadow(const void *address, size_t size);
	36
b8c73fc2 AR	37	void kasan_alloc_pages(struct page *page, unsigned int order);
	38	void kasan_free_pages(struct page *page, unsigned int order);
	39
0316bec2 AR	40	void kasan_poison_slab(struct page *page);
	41	void kasan_unpoison_object_data(struct kmem_cache cache, void object);
	42	void kasan_poison_object_data(struct kmem_cache cache, void object);
	43
	44	void kasan_kmalloc_large(const void *ptr, size_t size);
	45	void kasan_kfree_large(const void *ptr);
	46	void kasan_kmalloc(struct kmem_cache s, const void object, size_t size);
	47	void kasan_krealloc(const void *object, size_t new_size);
	48
	49	void kasan_slab_alloc(struct kmem_cache s, void object);
	50	void kasan_slab_free(struct kmem_cache s, void object);
	51
bebf56a1 AR	52	#define MODULE_ALIGN (PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT)
	53
	54	int kasan_module_alloc(void *addr, size_t size);
	55	void kasan_module_free(void *addr);
	56
0b24becc AR	57	#else /* CONFIG_KASAN */
0b24becc AR	58
bebf56a1 AR	59	#define MODULE_ALIGN 1
bebf56a1 AR	60
0b24becc AR	61	static inline void kasan_unpoison_shadow(const void *address, size_t size) {}
	62
	63	static inline void kasan_enable_current(void) {}
	64	static inline void kasan_disable_current(void) {}
	65
b8c73fc2 AR	66	static inline void kasan_alloc_pages(struct page *page, unsigned int order) {}
	67	static inline void kasan_free_pages(struct page *page, unsigned int order) {}
	68
0316bec2 AR	69	static inline void kasan_poison_slab(struct page *page) {}
	70	static inline void kasan_unpoison_object_data(struct kmem_cache *cache,
	71	void *object) {}
	72	static inline void kasan_poison_object_data(struct kmem_cache *cache,
	73	void *object) {}
	74
	75	static inline void kasan_kmalloc_large(void *ptr, size_t size) {}
	76	static inline void kasan_kfree_large(const void *ptr) {}
	77	static inline void kasan_kmalloc(struct kmem_cache s, const void object,
	78	size_t size) {}
	79	static inline void kasan_krealloc(const void *object, size_t new_size) {}
	80
	81	static inline void kasan_slab_alloc(struct kmem_cache s, void object) {}
	82	static inline void kasan_slab_free(struct kmem_cache s, void object) {}
	83
bebf56a1 AR	84	static inline int kasan_module_alloc(void *addr, size_t size) { return 0; }
	85	static inline void kasan_module_free(void *addr) {}
	86
0b24becc AR	87	#endif /* CONFIG_KASAN */
	88
	89	#endif /* LINUX_KASAN_H */