63 lines
2.5 KiB
C
63 lines
2.5 KiB
C
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/*
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* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
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* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "syscall_pub.h"
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int CheckRegion(const LosVmSpace *space, VADDR_T ptr, size_t len)
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{
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LosVmMapRegion *region = LOS_RegionFind((LosVmSpace *)space, ptr);
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if (region == NULL) {
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return -1;
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}
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if (ptr + len <= region->range.base + region->range.size) {
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return 0;
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}
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return CheckRegion(space, region->range.base + region->range.size,
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(ptr + len) - (region->range.base + region->range.size));
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}
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void *DupUserMem(const void *ptr, size_t len, int needCopy)
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{
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void *p = LOS_MemAlloc(OS_SYS_MEM_ADDR, len);
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if (p == NULL) {
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set_errno(ENOMEM);
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return NULL;
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}
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if (needCopy && LOS_ArchCopyFromUser(p, ptr, len) != 0) {
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LOS_MemFree(OS_SYS_MEM_ADDR, p);
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set_errno(EFAULT);
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return NULL;
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}
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return p;
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}
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