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/arch/um/kernel/skas/include/uaccess-skas.h

https://bitbucket.org/evzijst/gittest
C Header | 45 lines | 24 code | 7 blank | 14 comment | 7 complexity | e90a0d935fdb76ec53902867d5299826 MD5 | raw file
 1/*
 2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
 3 * Licensed under the GPL
 4 */
 5
 6#ifndef __SKAS_UACCESS_H
 7#define __SKAS_UACCESS_H
 8
 9#include "asm/errno.h"
10#include "asm/fixmap.h"
11
12#define access_ok_skas(type, addr, size) \
13	((segment_eq(get_fs(), KERNEL_DS)) || \
14	 (((unsigned long) (addr) < TASK_SIZE) && \
15	  ((unsigned long) (addr) + (size) <= TASK_SIZE)) || \
16	 ((type == VERIFY_READ ) && \
17	  ((unsigned long) (addr) >= FIXADDR_USER_START) && \
18	  ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \
19	  ((unsigned long) (addr) + (size) >= (unsigned long)(addr))))
20
21static inline int verify_area_skas(int type, const void * addr,
22				   unsigned long size)
23{
24	return(access_ok_skas(type, addr, size) ? 0 : -EFAULT);
25}
26
27extern int copy_from_user_skas(void *to, const void *from, int n);
28extern int copy_to_user_skas(void *to, const void *from, int n);
29extern int strncpy_from_user_skas(char *dst, const char *src, int count);
30extern int __clear_user_skas(void *mem, int len);
31extern int clear_user_skas(void *mem, int len);
32extern int strnlen_user_skas(const void *str, int len);
33
34#endif
35
36/*
37 * Overrides for Emacs so that we follow Linus's tabbing style.
38 * Emacs will notice this stuff at the end of the file and automatically
39 * adjust the settings for this buffer only.  This must remain at the end
40 * of the file.
41 * ---------------------------------------------------------------------------
42 * Local variables:
43 * c-file-style: "linux"
44 * End:
45 */