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101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/* $NetBSD: uaccess.h,v 1.2 2014/03/18 18:20:42 riastradh Exp $ */
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/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Taylor R. Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _ASM_UACCESS_H_
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#define _ASM_UACCESS_H_
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#include <sys/types.h>
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#include <sys/systm.h>
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/* XXX This is a cop-out. */
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#define VERIFY_READ 0
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#define VERIFY_WRITE 1
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static inline bool
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access_ok(int verify_op __unused, const void *uaddr __unused,
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size_t nbytes __unused)
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{
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return true;
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}
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#define __copy_from_user copy_from_user
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#define __copy_to_user copy_to_user
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static inline int
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copy_from_user(void *kernel_addr, const void *user_addr, size_t len)
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{
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/* XXX errno NetBSD->Linux */
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return -copyin(user_addr, kernel_addr, len);
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}
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static inline int
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copy_to_user(void *user_addr, const void *kernel_addr, size_t len)
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{
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/* XXX errno NetBSD->Linux */
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return -copyout(kernel_addr, user_addr, len);
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}
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#define get_user(KERNEL_LOC, USER_ADDR) \
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copy_from_user(&(KERNEL_LOC), (USER_ADDR), sizeof(KERNEL_LOC))
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#define put_user(KERNEL_LOC, USER_ADDR) \
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copy_to_user((USER_ADDR), &(KERNEL_LOC), sizeof(KERNEL_LOC))
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#if 0
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/*
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* XXX These `inatomic' versions are a cop out, but they should do for
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* now -- they are used only in fast paths which can't fault but which
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* can fall back to slower paths that arrange things so faulting is OK.
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*/
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static inline int
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__copy_from_user_inatomic(void *kernel_addr __unused,
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const void *user_addr __unused, size_t len __unused)
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{
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return -EFAULT;
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}
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static inline int
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__copy_to_user_inatomic(void *user_addr __unused,
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const void *kernel_addr __unused, size_t len __unused)
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{
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return -EFAULT;
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}
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#endif /* 0 */
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static inline int
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__copy_from_user_inatomic_nocache(void *kernel_addr __unused,
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const void *user_addr __unused, size_t len __unused)
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{
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return -EFAULT;
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}
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#endif /* _ASM_UACCESS_H_ */
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