1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 /*
3 * Copyright (C) 2002 Jeff Dike (jdike@karaya.
4 * Copyright (C) 2015 Richard Weinberger (rich
5 */
6
7 #ifndef __UM_UACCESS_H
8 #define __UM_UACCESS_H
9
10 #include <asm/elf.h>
11 #include <linux/unaligned.h>
12
13 #define __under_task_size(addr, size) \
14 (((unsigned long) (addr) < TASK_SIZE)
15 (((unsigned long) (addr) + (size)) <
16
17 #define __access_ok_vsyscall(addr, size) \
18 (((unsigned long) (addr) >= FIXADDR_
19 ((unsigned long) (addr) + (size) <=
20 ((unsigned long) (addr) + (size) >=
21
22 #define __addr_range_nowrap(addr, size) \
23 ((unsigned long) (addr) <= ((unsigned
24
25 extern unsigned long raw_copy_from_user(void *
26 extern unsigned long raw_copy_to_user(void __u
27 extern unsigned long __clear_user(void __user
28 static inline int __access_ok(const void __use
29
30 /* Teach asm-generic/uaccess.h that we have C
31 #define __access_ok __access_ok
32 #define __clear_user __clear_user
33
34 #define INLINE_COPY_FROM_USER
35 #define INLINE_COPY_TO_USER
36
37 #include <asm-generic/uaccess.h>
38
39 static inline int __access_ok(const void __use
40 {
41 unsigned long addr = (unsigned long)pt
42 return __addr_range_nowrap(addr, size)
43 (__under_task_size(addr, size)
44 __access_ok_vsyscall(addr, si
45 }
46
47 /* no pagefaults for kernel addresses in um */
48 #define __get_kernel_nofault(dst, src, type, e
49 do {
50 *((type *)dst) = get_unaligned((type *
51 if (0) /* make sure the label looks us
52 goto err_label;
53 } while (0)
54
55 #define __put_kernel_nofault(dst, src, type, e
56 do {
57 put_unaligned(*((type *)src), (type *)
58 if (0) /* make sure the label looks us
59 goto err_label;
60 } while (0)
61
62 #endif
63
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.