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 #include "user_copy.h"
33 #include "arm_user_copy.h"
34 #include "arm_user_clear.h"
35 #include "securec.h"
36 #include "los_memory.h"
37 #include "los_vm_map.h"
38
39
arch_copy_from_user(void * dst,const void * src,size_t len)40 size_t arch_copy_from_user(void *dst, const void *src, size_t len)
41 {
42 return LOS_ArchCopyFromUser(dst, src, len);
43 }
44
LOS_ArchCopyFromUser(void * dst,const void * src,size_t len)45 size_t LOS_ArchCopyFromUser(void *dst, const void *src, size_t len)
46 {
47 if (!LOS_IsUserAddressRange((VADDR_T)(UINTPTR)src, len)) {
48 return len;
49 }
50
51 return _arm_user_copy(dst, src, len);
52 }
53
arch_copy_to_user(void * dst,const void * src,size_t len)54 size_t arch_copy_to_user(void *dst, const void *src, size_t len)
55 {
56 return LOS_ArchCopyToUser(dst, src, len);
57 }
58
LOS_ArchCopyToUser(void * dst,const void * src,size_t len)59 size_t LOS_ArchCopyToUser(void *dst, const void *src, size_t len)
60 {
61 if (!LOS_IsUserAddressRange((VADDR_T)(UINTPTR)dst, len)) {
62 return len;
63 }
64
65 return _arm_user_copy(dst, src, len);
66 }
67
LOS_CopyFromKernel(VOID * dest,UINT32 max,const VOID * src,UINT32 count)68 INT32 LOS_CopyFromKernel(VOID *dest, UINT32 max, const VOID *src, UINT32 count)
69 {
70 INT32 ret;
71
72 if (!LOS_IsUserAddressRange((VADDR_T)(UINTPTR)dest, count)) {
73 ret = memcpy_s(dest, max, src, count);
74 } else {
75 ret = ((max >= count) ? _arm_user_copy(dest, src, count) : ERANGE_AND_RESET);
76 }
77
78 return ret;
79 }
80
LOS_CopyToKernel(VOID * dest,UINT32 max,const VOID * src,UINT32 count)81 INT32 LOS_CopyToKernel(VOID *dest, UINT32 max, const VOID *src, UINT32 count)
82 {
83 INT32 ret;
84
85 if (!LOS_IsUserAddressRange((vaddr_t)(UINTPTR)src, count)) {
86 ret = memcpy_s(dest, max, src, count);
87 } else {
88 ret = ((max >= count) ? _arm_user_copy(dest, src, count) : ERANGE_AND_RESET);
89 }
90
91 return ret;
92 }
93
LOS_UserMemClear(unsigned char * buf,UINT32 len)94 INT32 LOS_UserMemClear(unsigned char *buf, UINT32 len)
95 {
96 INT32 ret = 0;
97 if (!LOS_IsUserAddressRange((vaddr_t)(UINTPTR)buf, len)) {
98 (VOID)memset_s(buf, len, 0, len);
99 } else {
100 if (_arm_clear_user(buf, len)) {
101 return -EFAULT;
102 }
103 }
104 return ret;
105 }
106
107
108