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")))
34 void (*__PREINIT_ARRAY__)(void) = (void (*)(void)) -1;
35
36 __attribute__ ((section (".init_array")))
37 void (*__INIT_ARRAY__)(void) = (void (*)(void)) -1;
38
39 __attribute__ ((section (".fini_array")))
40 void (*__FINI_ARRAY__)(void) = (void (*)(void)) -1;
41
42
do_mips_start(void * raw_args)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 #if defined(__LP64__)
53
54 /*
55 * This function prepares the return address with a branch-and-link
56 * instruction (bal) and then uses a .cpsetup to compute the Global
57 * Offset Table (GOT) pointer ($gp). The $gp is then used to load
58 * the address of _do_mips_start() into $t9 just before calling it.
59 * Terminating the stack with a NULL return address.
60 */
61 __asm__ (
62 " .set push \n"
63 " \n"
64 " .text \n"
65 " .align 4 \n"
66 " .type __start,@function \n"
67 " .globl __start \n"
68 " .globl _start \n"
69 " \n"
70 " .ent __start \n"
71 "__start: \n"
72 " _start: \n"
73 " .frame $sp,32,$0 \n"
74 " .mask 0x80000000,-8 \n"
75 " \n"
76 " move $a0, $sp \n"
77 " daddiu $sp, $sp, -32 \n"
78 " \n"
79 " .set noreorder \n"
80 " bal 1f \n"
81 " nop \n"
82 "1: \n"
83 " .cpsetup $ra,16,1b \n"
84 " .set reorder \n"
85 " \n"
86 " sd $0, 24($sp) \n"
87 " jal do_mips_start \n"
88 " \n"
89 "2: b 2b \n"
90 " .end __start \n"
91 " \n"
92 " .set pop \n"
93 );
94
95 #else
96
97 /*
98 * This function prepares the return address with a branch-and-link
99 * instruction (bal) and then uses a .cpload to compute the Global
100 * Offset Table (GOT) pointer ($gp). The $gp is then used to load
101 * the address of _do_start() into $t9 just before calling it.
102 * Terminating the stack with a NULL return address.
103 */
104 __asm__ (
105 " .set push \n"
106 " \n"
107 " .text \n"
108 " .align 4 \n"
109 " .type __start,@function \n"
110 " .globl __start \n"
111 " .globl _start \n"
112 " \n"
113 " .ent __start \n"
114 "__start: \n"
115 " _start: \n"
116 " .frame $sp,32,$ra \n"
117 " .mask 0x80000000,-4 \n"
118 " \n"
119 " .set noreorder \n"
120 " bal 1f \n"
121 " nop \n"
122 "1: \n"
123 " .cpload $ra \n"
124 " .set reorder \n"
125 " \n"
126 " move $a0, $sp \n"
127 " addiu $sp, $sp, (-32) \n"
128 " sw $0, 28($sp) \n"
129 " la $t9, do_mips_start \n"
130 " jalr $t9 \n"
131 " \n"
132 "2: b 2b \n"
133 " .end __start \n"
134 " \n"
135 " .set pop \n"
136 );
137
138 #endif
139
140 #include "../../arch-common/bionic/__dso_handle.h"
141 #include "atexit.h"
142