143 lines
4.9 KiB
C
143 lines
4.9 KiB
C
/*
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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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#define _GNU_SOURCE
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#ifdef LOSCFG_FS_VFS
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#include "fs/file.h"
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#endif
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#include "los_init.h"
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#include "los_signal.h"
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#include "los_syscall.h"
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#include "los_task_pri.h"
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#include "los_process_pri.h"
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#include "los_hw_pri.h"
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#include "los_printf.h"
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#include "time.h"
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#include "utime.h"
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#include "poll.h"
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#include "mqueue.h"
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#include "los_futex_pri.h"
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#include "sys/times.h"
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#include "dirent.h"
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#include "fcntl.h"
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#include "unistd.h"
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#include "sys/mount.h"
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#include "sys/resource.h"
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#include "sys/mman.h"
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#include "sys/uio.h"
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#include "sys/prctl.h"
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#include "sys/socket.h"
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#include "sys/utsname.h"
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#include "poll.h"
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#include "sys/uio.h"
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#ifdef LOSCFG_SHELL
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#include "shmsg.h"
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#endif
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#ifdef LOSCFG_SECURITY_CAPABILITY
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#include "capability_api.h"
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#endif
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#include "sys/shm.h"
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#define SYS_CALL_NUM (__NR_syscallend + 1)
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#define NARG_BITS 4
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#define NARG_MASK 0x0F
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#define NARG_PER_BYTE 2
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typedef UINT32 (*SyscallFun1)(UINT32);
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typedef UINT32 (*SyscallFun3)(UINT32, UINT32, UINT32);
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typedef UINT32 (*SyscallFun5)(UINT32, UINT32, UINT32, UINT32, UINT32);
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typedef UINT32 (*SyscallFun7)(UINT32, UINT32, UINT32, UINT32, UINT32, UINT32, UINT32);
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static UINTPTR g_syscallHandle[SYS_CALL_NUM] = {0};
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static UINT8 g_syscallNArgs[(SYS_CALL_NUM + 1) / NARG_PER_BYTE] = {0};
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void OsSyscallHandleInit(void)
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{
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#define SYSCALL_HAND_DEF(id, fun, rType, nArg) \
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if ((id) < SYS_CALL_NUM) { \
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g_syscallHandle[(id)] = (UINTPTR)(fun); \
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g_syscallNArgs[(id) / NARG_PER_BYTE] |= ((id) & 1) ? (nArg) << NARG_BITS : (nArg); \
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} \
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#include "syscall_lookup.h"
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#undef SYSCALL_HAND_DEF
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}
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LOS_MODULE_INIT(OsSyscallHandleInit, LOS_INIT_LEVEL_KMOD_EXTENDED);
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/* The SYSCALL ID is in R7 on entry. Parameters follow in R0..R6 */
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VOID OsArmA32SyscallHandle(TaskContext *regs)
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{
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UINT32 ret;
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UINT8 nArgs;
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UINTPTR handle;
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UINT32 cmd = regs->reserved2;
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if (cmd >= SYS_CALL_NUM) {
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PRINT_ERR("Syscall ID: error %d !!!\n", cmd);
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return;
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}
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handle = g_syscallHandle[cmd];
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nArgs = g_syscallNArgs[cmd / NARG_PER_BYTE]; /* 4bit per nargs */
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nArgs = (cmd & 1) ? (nArgs >> NARG_BITS) : (nArgs & NARG_MASK);
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if ((handle == 0) || (nArgs > ARG_NUM_7)) {
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PRINT_ERR("Unsupported syscall ID: %d nArgs: %d\n", cmd, nArgs);
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regs->R0 = -ENOSYS;
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return;
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}
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OsSigIntLock();
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switch (nArgs) {
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case ARG_NUM_0:
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case ARG_NUM_1:
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ret = (*(SyscallFun1)handle)(regs->R0);
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break;
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case ARG_NUM_2:
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case ARG_NUM_3:
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ret = (*(SyscallFun3)handle)(regs->R0, regs->R1, regs->R2);
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break;
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case ARG_NUM_4:
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case ARG_NUM_5:
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ret = (*(SyscallFun5)handle)(regs->R0, regs->R1, regs->R2, regs->R3, regs->R4);
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break;
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default:
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ret = (*(SyscallFun7)handle)(regs->R0, regs->R1, regs->R2, regs->R3, regs->R4, regs->R5, regs->R6);
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}
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regs->R0 = ret;
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OsSigIntUnlock();
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return;
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}
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