1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29typedef struct
30{
31    void (**preinit_array)(void);
32    void (**init_array)(void);
33    void (**fini_array)(void);
34    void (**ctor_list)(void);
35} structors_array_t;
36
37extern int main(int argc, char **argv, char **env);
38
39extern void __libc_init(
40  unsigned int *elfdata,
41  void (*onexit)(void),
42  int (*slingshot)(int, char**, char**),
43  structors_array_t const * const structors
44);
45
46__attribute__ ((section (".preinit_array")))
47void (*__PREINIT_ARRAY__)(void) = (void (*)(void)) -1;
48
49__attribute__ ((section (".init_array")))
50void (*__INIT_ARRAY__)(void) = (void (*)(void)) -1;
51
52__attribute__ ((section (".fini_array")))
53void (*__FINI_ARRAY__)(void) = (void (*)(void)) -1;
54
55__attribute__ ((section (".ctors")))
56void (*__CTOR_LIST__)(void) = (void (*)(void)) -1;
57
58/* this is the small startup code that is first run when
59   any executable that is statically-linked with Bionic
60   runs.
61
62   it's purpose is to call __libc_init with appropriate
63   arguments, which are:
64
65    - the address of the raw data block setup by the Linux
66      kernel ELF loader
67
68    - address of an "onexit" function, not used on any
69      platform supported by Bionic
70
71    - address of the "main" function of the program.
72
73    - address of the constructor list
74*/
75
76__attribute__((visibility("hidden")))
77void _start() {
78  structors_array_t array;
79  void *elfdata;
80
81  array.preinit_array = &__PREINIT_ARRAY__;
82  array.init_array =    &__INIT_ARRAY__;
83  array.fini_array =    &__FINI_ARRAY__;
84  array.ctor_list =    &__CTOR_LIST__;
85
86  elfdata = __builtin_frame_address(0) + sizeof(void *);
87  __libc_init(elfdata, (void *) 0, &main, &array);
88}
89
90#include "__dso_handle.h"
91/* NOTE: atexit() is  not be provided by crtbegin_static.c, but by libc.a */
92