1 #ifndef __TOOLS_LINUX_SLAB_H
2 #define __TOOLS_LINUX_SLAB_H
8 #include <linux/kernel.h>
9 #include <linux/log2.h>
10 #include <linux/overflow.h>
11 #include <linux/page.h>
12 #include <linux/shrinker.h>
13 #include <linux/types.h>
18 #define ARCH_KMALLOC_MINALIGN 16
19 #define KMALLOC_MAX_SIZE SIZE_MAX
21 static inline void *kmalloc(size_t size, gfp_t flags)
26 for (i = 0; i < 10; i++) {
28 size_t alignment = min(rounddown_pow_of_two(size), (size_t)PAGE_SIZE);
29 alignment = max(sizeof(void *), alignment);
30 if (posix_memalign(&p, alignment, size))
37 if (flags & __GFP_ZERO)
42 run_shrinkers(flags, true);
48 static inline void *krealloc(void *old, size_t size, gfp_t flags)
52 new = kmalloc(size, flags);
56 if (flags & __GFP_ZERO)
61 min(malloc_usable_size(old),
62 malloc_usable_size(new)));
69 static inline void *krealloc_array(void *p, size_t new_n, size_t new_size, gfp_t flags)
73 if (unlikely(check_mul_overflow(new_n, new_size, &bytes)))
76 return krealloc(p, bytes, flags);
79 #define kzalloc(size, flags) kmalloc(size, flags|__GFP_ZERO)
80 #define kmalloc_array(n, size, flags) \
81 ((size) != 0 && (n) > SIZE_MAX / (size) \
82 ? NULL : kmalloc((n) * (size), flags))
84 #define kvmalloc_array(n, size, flags) \
85 ((size) != 0 && (n) > SIZE_MAX / (size) \
86 ? NULL : kmalloc((n) * (size), flags))
88 #define kcalloc(n, size, flags) kmalloc_array(n, size, flags|__GFP_ZERO)
90 #define kfree(p) free(p)
91 #define kzfree(p) free(p)
93 #define kvmalloc(size, flags) kmalloc(size, flags)
94 #define kvzalloc(size, flags) kzalloc(size, flags)
95 #define kvfree(p) kfree(p)
97 static inline struct page *alloc_pages(gfp_t flags, unsigned int order)
99 size_t size = PAGE_SIZE << order;
103 for (i = 0; i < 10; i++) {
104 p = aligned_alloc(PAGE_SIZE, size);
107 if (flags & __GFP_ZERO)
112 run_shrinkers(flags, true);
118 #define alloc_page(gfp) alloc_pages(gfp, 0)
120 #define __get_free_pages(gfp, order) ((unsigned long) alloc_pages(gfp, order))
121 #define __get_free_page(gfp) __get_free_pages(gfp, 0)
123 #define __free_pages(page, order) \
129 #define free_pages(addr, order) \
132 free((void *) (addr)); \
135 #define __free_page(page) __free_pages((page), 0)
136 #define free_page(addr) free_pages((addr), 0)
138 #define VM_IOREMAP 0x00000001 /* ioremap() and friends */
139 #define VM_ALLOC 0x00000002 /* vmalloc() */
140 #define VM_MAP 0x00000004 /* vmap()ed pages */
141 #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
142 #define VM_UNINITIALIZED 0x00000020 /* vm_struct is not fully initialized */
143 #define VM_NO_GUARD 0x00000040 /* don't add guard page */
144 #define VM_KASAN 0x00000080 /* has allocated kasan shadow memory */
146 static inline void vunmap(const void *addr) {}
148 static inline void *vmap(struct page **pages, unsigned int count,
149 unsigned long flags, unsigned prot)
154 #define is_vmalloc_addr(page) 0
156 #define vmalloc_to_page(addr) ((struct page *) (addr))
158 static inline void *kmemdup(const void *src, size_t len, gfp_t gfp)
162 p = kmalloc(len, gfp);
172 static inline void *kmem_cache_alloc(struct kmem_cache *c, gfp_t gfp)
174 return kmalloc(c->obj_size, gfp);
177 static inline void kmem_cache_free(struct kmem_cache *c, void *p)
182 static inline void kmem_cache_destroy(struct kmem_cache *p)
187 static inline struct kmem_cache *kmem_cache_create(size_t obj_size)
189 struct kmem_cache *p = kmalloc(sizeof(*p), GFP_KERNEL);
193 p->obj_size = obj_size;
197 #define KMEM_CACHE(_struct, _flags) kmem_cache_create(sizeof(struct _struct))
199 #define PAGE_KERNEL 0
200 #define PAGE_KERNEL_EXEC 1
202 #define vfree(p) free(p)
204 static inline void *__vmalloc(unsigned long size, gfp_t flags)
209 size = round_up(size, PAGE_SIZE);
211 for (i = 0; i < 10; i++) {
212 p = aligned_alloc(PAGE_SIZE, size);
215 if (flags & __GFP_ZERO)
220 run_shrinkers(flags, true);
226 static inline void *vmalloc_exec(unsigned long size, gfp_t gfp_mask)
230 p = __vmalloc(size, gfp_mask);
234 if (mprotect(p, size, PROT_READ|PROT_WRITE|PROT_EXEC)) {
242 static inline void *vmalloc(unsigned long size)
244 return __vmalloc(size, GFP_KERNEL);
247 static inline void *vzalloc(unsigned long size)
249 return __vmalloc(size, GFP_KERNEL|__GFP_ZERO);
252 #endif /* __TOOLS_LINUX_SLAB_H */