2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Copyright (C) 2015 Richard Weinberger (richard@nod.at)
4 * Licensed under the GPL
12 #define __under_task_size(addr, size) \
13 (((unsigned long) (addr) < TASK_SIZE) && \
14 (((unsigned long) (addr) + (size)) < TASK_SIZE))
16 #define __access_ok_vsyscall(addr, size) \
17 (((unsigned long) (addr) >= FIXADDR_USER_START) && \
18 ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \
19 ((unsigned long) (addr) + (size) >= (unsigned long)(addr)))
21 #define __addr_range_nowrap(addr, size) \
22 ((unsigned long) (addr) <= ((unsigned long) (addr) + (size)))
24 extern unsigned long raw_copy_from_user(void *to
, const void __user
*from
, unsigned long n
);
25 extern unsigned long raw_copy_to_user(void __user
*to
, const void *from
, unsigned long n
);
26 extern long __strncpy_from_user(char *dst
, const char __user
*src
, long count
);
27 extern long __strnlen_user(const void __user
*str
, long len
);
28 extern unsigned long __clear_user(void __user
*mem
, unsigned long len
);
29 static inline int __access_ok(unsigned long addr
, unsigned long size
);
31 /* Teach asm-generic/uaccess.h that we have C functions for these. */
32 #define __access_ok __access_ok
33 #define __clear_user __clear_user
34 #define __strnlen_user __strnlen_user
35 #define __strncpy_from_user __strncpy_from_user
36 #define INLINE_COPY_FROM_USER
37 #define INLINE_COPY_TO_USER
39 #include <asm-generic/uaccess.h>
41 static inline int __access_ok(unsigned long addr
, unsigned long size
)
43 return __addr_range_nowrap(addr
, size
) &&
44 (__under_task_size(addr
, size
) ||
45 __access_ok_vsyscall(addr
, size
) ||