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 #define _GNU_SOURCE
33 #ifdef LOSCFG_FS_VFS
34 #include "fs/file.h"
35 #endif
36 #include "los_init.h"
37 #include "los_signal.h"
38 #include "los_syscall.h"
39 #include "los_task_pri.h"
40 #include "los_process_pri.h"
41 #include "los_hw_pri.h"
42 #include "los_printf.h"
43 #include "time.h"
44 #include "utime.h"
45 #include "poll.h"
46 #include "mqueue.h"
47 #include "los_futex_pri.h"
48 #include "sys/times.h"
49 #include "dirent.h"
50 #include "fcntl.h"
51 #include "unistd.h"
52
53 #include "sys/mount.h"
54 #include "sys/resource.h"
55 #include "sys/mman.h"
56 #include "sys/uio.h"
57 #include "sys/prctl.h"
58 #include "sys/socket.h"
59 #include "sys/utsname.h"
60 #ifdef LOSCFG_SHELL
61 #include "shmsg.h"
62 #endif
63 #ifdef LOSCFG_SECURITY_CAPABILITY
64 #include "capability_api.h"
65 #endif
66 #include "sys/shm.h"
67
68
69 #define SYS_CALL_NUM (__NR_syscallend + 1)
70 #define NARG_BITS 4
71 #define NARG_MASK 0x0F
72 #define NARG_PER_BYTE 2
73
74 typedef UINT32 (*SyscallFun1)(UINT32);
75 typedef UINT32 (*SyscallFun3)(UINT32, UINT32, UINT32);
76 typedef UINT32 (*SyscallFun5)(UINT32, UINT32, UINT32, UINT32, UINT32);
77 typedef UINT32 (*SyscallFun7)(UINT32, UINT32, UINT32, UINT32, UINT32, UINT32, UINT32);
78
79 static UINTPTR g_syscallHandle[SYS_CALL_NUM] = {0};
80 static UINT8 g_syscallNArgs[(SYS_CALL_NUM + 1) / NARG_PER_BYTE] = {0};
81
OsSyscallHandleInit(void)82 void OsSyscallHandleInit(void)
83 {
84 #define SYSCALL_HAND_DEF(id, fun, rType, nArg) \
85 if ((id) < SYS_CALL_NUM) { \
86 g_syscallHandle[(id)] = (UINTPTR)(fun); \
87 g_syscallNArgs[(id) / NARG_PER_BYTE] |= ((id) & 1) ? (nArg) << NARG_BITS : (nArg); \
88 } \
89
90 #include "syscall_lookup.h"
91 #undef SYSCALL_HAND_DEF
92 }
93
94 LOS_MODULE_INIT(OsSyscallHandleInit, LOS_INIT_LEVEL_KMOD_EXTENDED);
95
96 /* The SYSCALL ID is in R7 on entry. Parameters follow in R0..R6 */
OsArmA32SyscallHandle(TaskContext * regs)97 VOID OsArmA32SyscallHandle(TaskContext *regs)
98 {
99 UINT32 ret;
100 UINT8 nArgs;
101 UINTPTR handle;
102 UINT32 cmd = regs->reserved2;
103
104 if (cmd >= SYS_CALL_NUM) {
105 PRINT_ERR("Syscall ID: error %d !!!\n", cmd);
106 return;
107 }
108
109 handle = g_syscallHandle[cmd];
110 nArgs = g_syscallNArgs[cmd / NARG_PER_BYTE]; /* 4bit per nargs */
111 nArgs = (cmd & 1) ? (nArgs >> NARG_BITS) : (nArgs & NARG_MASK);
112 if ((handle == 0) || (nArgs > ARG_NUM_7)) {
113 PRINT_ERR("Unsupported syscall ID: %d nArgs: %d\n", cmd, nArgs);
114 regs->R0 = -ENOSYS;
115 return;
116 }
117
118 OsSigIntLock();
119 switch (nArgs) {
120 case ARG_NUM_0:
121 case ARG_NUM_1:
122 ret = (*(SyscallFun1)handle)(regs->R0);
123 break;
124 case ARG_NUM_2:
125 case ARG_NUM_3:
126 ret = (*(SyscallFun3)handle)(regs->R0, regs->R1, regs->R2);
127 break;
128 case ARG_NUM_4:
129 case ARG_NUM_5:
130 ret = (*(SyscallFun5)handle)(regs->R0, regs->R1, regs->R2, regs->R3, regs->R4);
131 break;
132 default:
133 ret = (*(SyscallFun7)handle)(regs->R0, regs->R1, regs->R2, regs->R3, regs->R4, regs->R5, regs->R6);
134 }
135
136 regs->R0 = ret;
137 OsSigIntUnlock();
138
139 return;
140 }
141