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 "los_user_init.h"
33 #include "los_syscall.h"
34
35 #ifdef LOSCFG_KERNEL_SYSCALL
36
37 #define SYS_CALL_VALUE 0x900001
38
39 #ifdef LOSCFG_QUICK_START
40 LITE_USER_SEC_RODATA STATIC CHAR *g_initPath = "/dev/shm/init";
41 #else
42 LITE_USER_SEC_RODATA STATIC CHAR *g_initPath = "/bin/init";
43 #endif
44
sys_call3(UINT32 nbr,UINT32 parm1,UINT32 parm2,UINT32 parm3)45 LITE_USER_SEC_TEXT STATIC UINT32 sys_call3(UINT32 nbr, UINT32 parm1, UINT32 parm2, UINT32 parm3)
46 {
47 register UINT32 reg7 __asm__("r7") = (UINT32)(nbr);
48 register UINT32 reg2 __asm__("r2") = (UINT32)(parm3);
49 register UINT32 reg1 __asm__("r1") = (UINT32)(parm2);
50 register UINT32 reg0 __asm__("r0") = (UINT32)(parm1);
51
52 __asm__ __volatile__
53 (
54 "svc %1"
55 : "=r"(reg0)
56 : "i"(SYS_CALL_VALUE), "r"(reg7), "r"(reg0), "r"(reg1), "r"(reg2)
57 : "memory", "r14"
58 );
59
60 return reg0;
61 }
62
OsUserInit(VOID * args)63 LITE_USER_SEC_ENTRY VOID OsUserInit(VOID *args)
64 {
65 #ifdef LOSCFG_KERNEL_DYNLOAD
66 sys_call3(__NR_execve, (UINTPTR)g_initPath, 0, 0);
67 #endif
68 while (true) {
69 }
70 }
71 #endif
72