1 /*
2 * Copyright (c) 2022-2022 Huawei Device Co., Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without modification,
5 * are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice, this list of
8 * conditions and the following disclaimer.
9 *
10 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
11 * of conditions and the following disclaimer in the documentation and/or other materials
12 * provided with the distribution.
13 *
14 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific prior written
16 * permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "usr_lib_define.h"
32 #include "usr_lib_ops.h"
33 #include "syscall.h"
34 #include "stdint.h"
35 #include "pthread_impl.h"
36
37 _LIBC_DATA_SECTION static UsrLibcOps g_libcOps;
38
39 extern void _lib_ops_init(UsrLibcOps *ops);
40 typedef void (*box_start)(uintptr_t libcOps);
41
__set_thread_area(void * p)42 _LIBC_TEXT_SECTION int __set_thread_area(void *p)
43 {
44 return __syscall(SYS_set_thread_area, p);
45 }
46
_ulibc_start(uintptr_t main)47 _LIBC_TEXT_ENTRY int _ulibc_start(uintptr_t main)
48 {
49 box_start start = (box_start)main;
50 _lib_ops_init(&g_libcOps);
51
52 struct pthread *thread_area = 0x10000000;
53 if (thread_area == NULL) {
54 while (1);
55 }
56
57 memset(thread_area, 0, sizeof(struct pthread));
58
59 thread_area->tid = __syscall(SYS_gettid);
60 __set_thread_area(TP_ADJ(thread_area));
61
62 start(&g_libcOps);
63 while (1);
64 }
65
66