uaccess.h revision 1.2
1 1.2 riastrad /* $NetBSD: uaccess.h,v 1.2 2014/03/18 18:20:42 riastradh Exp $ */ 2 1.2 riastrad 3 1.2 riastrad /*- 4 1.2 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2 riastrad * All rights reserved. 6 1.2 riastrad * 7 1.2 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 riastrad * by Taylor R. Campbell. 9 1.2 riastrad * 10 1.2 riastrad * Redistribution and use in source and binary forms, with or without 11 1.2 riastrad * modification, are permitted provided that the following conditions 12 1.2 riastrad * are met: 13 1.2 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.2 riastrad * notice, this list of conditions and the following disclaimer. 15 1.2 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.2 riastrad * documentation and/or other materials provided with the distribution. 18 1.2 riastrad * 19 1.2 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.2 riastrad */ 31 1.2 riastrad 32 1.2 riastrad #ifndef _ASM_UACCESS_H_ 33 1.2 riastrad #define _ASM_UACCESS_H_ 34 1.2 riastrad 35 1.2 riastrad #include <sys/types.h> 36 1.2 riastrad #include <sys/systm.h> 37 1.2 riastrad 38 1.2 riastrad /* XXX This is a cop-out. */ 39 1.2 riastrad #define VERIFY_READ 0 40 1.2 riastrad #define VERIFY_WRITE 1 41 1.2 riastrad static inline bool 42 1.2 riastrad access_ok(int verify_op __unused, const void *uaddr __unused, 43 1.2 riastrad size_t nbytes __unused) 44 1.2 riastrad { 45 1.2 riastrad return true; 46 1.2 riastrad } 47 1.2 riastrad 48 1.2 riastrad #define __copy_from_user copy_from_user 49 1.2 riastrad #define __copy_to_user copy_to_user 50 1.2 riastrad 51 1.2 riastrad static inline int 52 1.2 riastrad copy_from_user(void *kernel_addr, const void *user_addr, size_t len) 53 1.2 riastrad { 54 1.2 riastrad /* XXX errno NetBSD->Linux */ 55 1.2 riastrad return -copyin(user_addr, kernel_addr, len); 56 1.2 riastrad } 57 1.2 riastrad 58 1.2 riastrad static inline int 59 1.2 riastrad copy_to_user(void *user_addr, const void *kernel_addr, size_t len) 60 1.2 riastrad { 61 1.2 riastrad /* XXX errno NetBSD->Linux */ 62 1.2 riastrad return -copyout(kernel_addr, user_addr, len); 63 1.2 riastrad } 64 1.2 riastrad 65 1.2 riastrad #define get_user(KERNEL_LOC, USER_ADDR) \ 66 1.2 riastrad copy_from_user(&(KERNEL_LOC), (USER_ADDR), sizeof(KERNEL_LOC)) 67 1.2 riastrad 68 1.2 riastrad #define put_user(KERNEL_LOC, USER_ADDR) \ 69 1.2 riastrad copy_to_user((USER_ADDR), &(KERNEL_LOC), sizeof(KERNEL_LOC)) 70 1.2 riastrad 71 1.2 riastrad #if 0 72 1.2 riastrad /* 73 1.2 riastrad * XXX These `inatomic' versions are a cop out, but they should do for 74 1.2 riastrad * now -- they are used only in fast paths which can't fault but which 75 1.2 riastrad * can fall back to slower paths that arrange things so faulting is OK. 76 1.2 riastrad */ 77 1.2 riastrad 78 1.2 riastrad static inline int 79 1.2 riastrad __copy_from_user_inatomic(void *kernel_addr __unused, 80 1.2 riastrad const void *user_addr __unused, size_t len __unused) 81 1.2 riastrad { 82 1.2 riastrad return -EFAULT; 83 1.2 riastrad } 84 1.2 riastrad 85 1.2 riastrad static inline int 86 1.2 riastrad __copy_to_user_inatomic(void *user_addr __unused, 87 1.2 riastrad const void *kernel_addr __unused, size_t len __unused) 88 1.2 riastrad { 89 1.2 riastrad return -EFAULT; 90 1.2 riastrad } 91 1.2 riastrad #endif /* 0 */ 92 1.2 riastrad 93 1.2 riastrad static inline int 94 1.2 riastrad __copy_from_user_inatomic_nocache(void *kernel_addr __unused, 95 1.2 riastrad const void *user_addr __unused, size_t len __unused) 96 1.2 riastrad { 97 1.2 riastrad return -EFAULT; 98 1.2 riastrad } 99 1.2 riastrad 100 1.2 riastrad #endif /* _ASM_UACCESS_H_ */ 101
Indexes created Sun Sep 21 20:09:37 GMT 2025