1
2 #include <malloc.h>
3 #include <memalign.h>
4 #include <asm/cache.h>
5 #include <linux/compat.h>
6
7 struct p_current cur = {
8 .pid = 1,
9 };
10 __maybe_unused struct p_current *current = &cur;
11
copy_from_user(void * dest,const void * src,unsigned long count)12 unsigned long copy_from_user(void *dest, const void *src,
13 unsigned long count)
14 {
15 memcpy((void *)dest, (void *)src, count);
16 return 0;
17 }
18
kmalloc(size_t size,int flags)19 void *kmalloc(size_t size, int flags)
20 {
21 void *p;
22
23 p = malloc_cache_aligned(size);
24 if (p && flags & __GFP_ZERO)
25 memset(p, 0, size);
26
27 return p;
28 }
29
get_mem(int element_sz)30 struct kmem_cache *get_mem(int element_sz)
31 {
32 struct kmem_cache *ret;
33
34 ret = memalign(ARCH_DMA_MINALIGN, sizeof(struct kmem_cache));
35 ret->sz = element_sz;
36
37 return ret;
38 }
39
kmem_cache_alloc(struct kmem_cache * obj,int flag)40 void *kmem_cache_alloc(struct kmem_cache *obj, int flag)
41 {
42 return malloc_cache_aligned(obj->sz);
43 }
44
45 /**
46 * kmemdup - duplicate region of memory
47 *
48 * @src: memory region to duplicate
49 * @len: memory region length
50 * @gfp: GFP mask to use
51 *
52 * Return: newly allocated copy of @src or %NULL in case of error
53 */
kmemdup(const void * src,size_t len,gfp_t gfp)54 void *kmemdup(const void *src, size_t len, gfp_t gfp)
55 {
56 void *p;
57
58 p = kmalloc(len, gfp);
59 if (p)
60 memcpy(p, src, len);
61 return p;
62 }
63