1 /* 2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved. 3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without modification, 6 * are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, this list of 9 * conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list 12 * of conditions and the following disclaimer in the documentation and/or other materials 13 * provided with the distribution. 14 * 15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used 16 * to endorse or promote products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _LOS_USER_GET_H 33 #define _LOS_USER_GET_H 34 35 #include "los_typedef.h" 36 #include "arm_user_get.h" 37 38 #ifdef __cplusplus 39 #if __cplusplus 40 extern "C" { 41 #endif /* __cplusplus */ 42 #endif /* __cplusplus */ 43 44 /* 45 * @brief Get data from userspace into kernelspace 46 * 47 * This function validates that usermode has access to src before copying the 48 * data. 49 * 50 * @param dst The destination buffer in kernel space. 51 * @param src The source buffer in user space. 52 * 53 * @note The data type is simple such as char, short, int, long in 32bits platform. 54 * 55 * @return Return -EFAULT if error. Return 0 if success. 56 */ 57 #define LOS_GetUser(dst, src) _arm_get_user((dst), (src), sizeof(*(dst)), sizeof(*(src))) 58 59 #ifdef __cplusplus 60 #if __cplusplus 61 } 62 #endif /* __cplusplus */ 63 #endif /* __cplusplus */ 64 65 #endif /* _LOS_USER_GET_H */ 66