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kernel_liteos_a/syscall/syscall_pub.h

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/*
* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SYSCALL_PUB_H
#define _SYSCALL_PUB_H
#include <stdlib.h>
#include "los_memory.h"
#include "los_vm_lock.h"
#include "los_vm_map.h"
#include "user_copy.h"
extern int CheckRegion(const LosVmSpace *space, VADDR_T ptr, size_t len);
extern void *DupUserMem(const void *ptr, size_t len, int needCopy);
#define CHECK_ASPACE(ptr, len, ...) \
do { \
if (ptr != NULL && len != 0) { \
if (!LOS_IsUserAddressRange((VADDR_T)(UINTPTR)ptr, len)) { \
set_errno(EFAULT); \
__VA_ARGS__; \
return -get_errno(); \
} \
LosVmSpace *__aspace = OsCurrProcessGet()->vmSpace; \
(VOID)LOS_MuxAcquire(&__aspace->regionMux); \
if (CheckRegion(__aspace, (VADDR_T)(UINTPTR)ptr, len) == -1) { \
(VOID)LOS_MuxRelease(&__aspace->regionMux); \
set_errno(EFAULT); \
__VA_ARGS__; \
return -get_errno(); \
} \
(VOID)LOS_MuxRelease(&__aspace->regionMux); \
} \
} while (0)
#define LEN(ptr) ((ptr) ? *(ptr) : 0)
#define DUP_FROM_USER_(ptr, size, copy, ...) \
__typeof(ptr) ptr##bak = ptr; \
if (ptr != NULL && (size) != 0) { \
ptr = DupUserMem(ptr, size, copy); \
if (ptr == NULL) { \
ptr = ptr##bak; \
__VA_ARGS__; \
return -get_errno(); \
} \
}
/*
DUP_FROM_USER(ptr, size, ...) can not deal with "char *";
Please deal with the "char *" by function:UserPathCopy.
*/
#define DUP_FROM_USER(ptr, size, ...) \
DUP_FROM_USER_(ptr, size, 1, ##__VA_ARGS__)
#define DUP_FROM_USER_NOCOPY(ptr, size, ...) \
DUP_FROM_USER_(ptr, size, 0, ##__VA_ARGS__)
#define DUP_TO_USER(ptr, size, ...) \
do { \
if (ptr != NULL && (size) != 0) { \
if (LOS_ArchCopyToUser(ptr##bak, ptr, size) != 0) { \
set_errno(EFAULT); \
__VA_ARGS__; \
return -get_errno(); \
} \
} \
} while (0)
#define FREE_DUP(ptr) \
do { \
if (ptr != ptr##bak) { \
LOS_MemFree(OS_SYS_MEM_ADDR, (void*)ptr); \
ptr = ptr##bak; \
} \
} while (0)
#define CPY_FROM_USER(ptr) \
__typeof(*ptr) ptr##cpy = {0}, *ptr##bak = ptr; \
if (ptr != NULL) { \
if (LOS_ArchCopyFromUser((void*)&ptr##cpy, ptr, sizeof(*ptr)) != 0) { \
set_errno(EFAULT); \
return -get_errno(); \
} \
ptr = &ptr##cpy; \
}
#define CPY_TO_USER(ptr, ...) \
if (ptr != NULL) { \
if (LOS_ArchCopyToUser(ptr##bak, ptr, sizeof(*ptr)) != 0) { \
set_errno(EFAULT); \
__VA_ARGS__; \
return -get_errno(); \
} \
}
/** Macros for sendmsg and recvmsg */
#define CONST_CAST(ptr) ((__typeof(ptr##_NONCONST))ptr)
#define CHECK_FIELD_ASPACE(ptr, field, len) \
do { \
if (ptr != NULL) { \
CHECK_ASPACE(ptr->field, len); \
} \
} while (0)
#define CHECK_ARRAY_FIELD_ASPACE(ptr, arr, arrlen, field, len, ...) \
do { \
if (ptr != NULL && ptr->arr != NULL) { \
for (size_t i = 0; i < arrlen; i++) { \
CHECK_ASPACE(ptr->arr[i].field, ptr->arr[i].len, ##__VA_ARGS__); \
} \
} \
} while (0)
#define DUP_FIELD_FROM_USER_(ptr, field, size, copy, ...) \
do { \
if (ptr != NULL && ptr->field != NULL && (size) != 0) { \
CONST_CAST(ptr)->field = DupUserMem(ptr->field, size, copy); \
if (ptr->field == NULL) { \
__VA_ARGS__; \
return -get_errno(); \
} \
} \
} while (0)
#define DUP_FIELD_FROM_USER(ptr, field, size, ...) \
DUP_FIELD_FROM_USER_(ptr, field, size, 1, ##__VA_ARGS__)
#define DUP_FIELD_FROM_USER_NOCOPY(ptr, field, size, ...) \
DUP_FIELD_FROM_USER_(ptr, field, size, 0, ##__VA_ARGS__)
/* backup the arr to ptr##arr */
#define DUP_ARRAY_FIELD_FROM_USER_(ext, ptr, arr, arrlen, field, len, ...) \
__typeof(*ptr##_NONCONST) ptr##arr##cpy = ptr##cpybak, ptr##arr##cpybak = ptr##cpybak; \
__typeof(ptr##_NONCONST) ptr##arr = ptr ? &ptr##arr##cpy : NULL, ptr##arr##_NONCONST = NULL; \
DUP_FIELD_FROM_USER(ptr##arr, arr, arrlen * sizeof(ptr->arr[0]), ##__VA_ARGS__); \
if (ptr != NULL && ptr->arr != NULL) { \
size_t i = 0; \
for (; i < arrlen; i++) { \
DUP_FIELD_FROM_USER##ext(ptr, arr[i].field, ptr->arr[i].len, break); \
} \
if (i != arrlen) { \
FREE_DUP_ARRAY_FIELD(ptr, arr, i, field); \
__VA_ARGS__; \
return -get_errno(); \
} \
}
#define DUP_ARRAY_FIELD_FROM_USER(ptr, arr, arrlen, field, len, ...) \
DUP_ARRAY_FIELD_FROM_USER_(, ptr, arr, arrlen, field, len, ##__VA_ARGS__)
#define DUP_ARRAY_FIELD_FROM_USER_NOCOPY(ptr, arr, arrlen, field, len, ...) \
DUP_ARRAY_FIELD_FROM_USER_(_NOCOPY, ptr, arr, arrlen, field, len, ##__VA_ARGS__)
#define FREE_DUP_FIELD(ptr, field) \
do { \
if (ptr != NULL && ptr->field != ptr##cpybak.field) { \
LOS_MemFree(OS_SYS_MEM_ADDR, (void*)ptr->field); \
CONST_CAST(ptr)->field = ptr##cpybak.field; \
} \
} while (0)
/* use and free the backuped arr in ptr##arr */
#define FREE_DUP_ARRAY_FIELD(ptr, arr, arrlen, field) \
if (ptr != NULL && ptr->arr != NULL && arrlen != 0) { \
__typeof(ptr##cpybak.arr) tmp = ptr##cpybak.arr; \
ptr##cpybak.arr = ptr##arr->arr; \
for (size_t j = 0; j < arrlen; j++) { \
FREE_DUP_FIELD(ptr, arr[j].field); \
} \
ptr##cpybak.arr = tmp; \
} \
FREE_DUP_FIELD(ptr##arr, arr);
#define CPY_FROM_CONST_USER(NonConstType, ptr) \
CPY_FROM_USER(ptr); \
NonConstType *ptr##_NONCONST = NULL, ptr##cpybak = ptr##cpy; \
(void)ptr##bak;
#define CPY_FROM_NONCONST_USER(ptr) \
CPY_FROM_USER(ptr); \
__typeof(*ptr) *ptr##_NONCONST = NULL, ptr##cpybak = ptr##cpy;
#define DUP_FIELD_TO_USER(ptr, field, size, ...) \
do { \
if (ptr != NULL && ptr->field != NULL && (size) != 0) { \
if (LOS_ArchCopyToUser(ptr##cpybak.field, ptr->field, size) != 0 || \
LOS_ArchCopyToUser(&ptr##bak->field, &ptr##cpybak.field, sizeof(__typeof(ptr##cpybak.field))) != 0) { \
set_errno(EFAULT); \
__VA_ARGS__; \
return -get_errno(); \
} \
} \
} while (0)
/* use the backuped arr from ptr##arr */
#define DUP_ARRAY_FIELD_TO_USER(ptr, arr, arrlen, field, len, ...) \
if (ptr != NULL && ptr->arr != NULL) { \
__typeof(ptr##cpybak.arr) tmp = ptr##cpybak.arr; \
__typeof(ptr##bak) tmp2 = ptr##bak; \
ptr##cpybak.arr = ptr##arr->arr; \
ptr##arr->arr = tmp; \
ptr##bak = ptr##arr; \
for (size_t i = 0; i < arrlen; i++) { \
DUP_FIELD_TO_USER(ptr, arr[i].field, ptr->arr[i].len, ##__VA_ARGS__); \
} \
ptr##bak = tmp2; \
ptr##arr->arr = ptr##cpybak.arr; \
ptr##cpybak.arr = tmp; \
}
#define PointerFree(ptr) \
do { \
if (ptr != NULL) { \
LOS_MemFree(OS_SYS_MEM_ADDR, (void*)ptr); \
} \
} while (0)
#endif
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