1/*
2 * Copyright (C) 2013 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
29#include "../../bionic/libc_init_common.h"
30#include <stddef.h>
31#include <stdint.h>
32
33__attribute__ ((section (".preinit_array")))
34void (*__PREINIT_ARRAY__)(void) = (void (*)(void)) -1;
35
36__attribute__ ((section (".init_array")))
37void (*__INIT_ARRAY__)(void) = (void (*)(void)) -1;
38
39__attribute__ ((section (".fini_array")))
40void (*__FINI_ARRAY__)(void) = (void (*)(void)) -1;
41
42
43__LIBC_HIDDEN__  void do_mips_start(void *raw_args) {
44  structors_array_t array;
45  array.preinit_array = &__PREINIT_ARRAY__;
46  array.init_array = &__INIT_ARRAY__;
47  array.fini_array = &__FINI_ARRAY__;
48
49  __libc_init(raw_args, NULL, &main, &array);
50}
51
52/*
53 * This function prepares the return address with a branch-and-link
54 * instruction (bal) and then uses a .cpload to compute the Global
55 * Offset Table (GOT) pointer ($gp). The $gp is then used to load
56 * the address of _do_start() into $t9 just before calling it.
57 * Terminating the stack with a NULL return address.
58 */
59__asm__ (
60"       .set push                   \n"
61"                                   \n"
62"       .text                       \n"
63"       .align  4                   \n"
64"       .type __start,@function     \n"
65"       .globl __start              \n"
66"       .globl  _start              \n"
67"                                   \n"
68"       .ent    __start             \n"
69"__start:                           \n"
70" _start:                           \n"
71"       .frame   $sp,32,$ra         \n"
72"       .mask   0x80000000,-4       \n"
73"                                   \n"
74"       .set noreorder              \n"
75"       bal     1f                  \n"
76"       nop                         \n"
77"1:                                 \n"
78"       .cpload $ra                 \n"
79"       .set reorder                \n"
80"                                   \n"
81"       move    $a0, $sp            \n"
82"       addiu   $sp, $sp, (-32)     \n"
83"       sw      $0, 28($sp)         \n"
84"       la      $t9, do_mips_start  \n"
85"       jalr    $t9                 \n"
86"                                   \n"
87"2:     b       2b                  \n"
88"       .end    __start             \n"
89"                                   \n"
90"       .set pop                    \n"
91);
92
93#include "__dso_handle.h"
94#include "atexit.h"
95