1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/* Startup code compliant to the ELF C-SKY ABIV2.
Copyright (C) 2018-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
In addition to the permissions in the GNU Lesser General Public
License, the Free Software Foundation gives you unlimited
permission to link the compiled version of this file with other
programs, and to distribute those programs without any restriction
coming from the use of this file. (The GNU Lesser General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into another program.)
Note that people who make modified versions of this file are not
obligated to grant this special exception for their modified
versions; it is their choice whether to do so. The GNU Lesser
General Public License gives permission to release a modified
version without this exception; this exception also makes it
possible to release a modified version which carries forward this
exception.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
/* We need to call:
__libc_start_main (int (*main) (int, char **, char **), int argc,
char **argv, void (*init) (void), void (*fini) (void),
void (*rtld_fini) (void), void *stack_end)
*/
#include <sysdep.h>
.text
.globl _start;
.type _start,@function;
.align 4;
_start:
cfi_startproc
.cfi_label .Ldummy
cfi_undefined (lr)
subi sp, 8
/* Clear the link register since this is the outermost frame. */
movi lr, 0
/* Pop argc off the stack and save a pointer to argv. */
ldw a1, (sp, 8) /* Init argc for __libc_start_main. */
addi a2, sp, 12 /* Init argv for __libc_start_main. */
/* Push stack limit. */
stw a2, (sp, 8)
/* Push rtld_fini. */
stw a0, (sp, 4)
#ifdef SHARED
grs t0, .Lgetpc
.Lgetpc:
lrw gb, .Lgetpc@GOTPC
addu gb, t0
lrw a3, __libc_csu_fini@GOT
ldr.w a3, (gb, a3 << 0)
stw a3, (sp, 0)
lrw a3, __libc_csu_init@GOT
addu a3, gb
ldw a3, (a3, 0)
lrw t0, main@GOT
addu t0, gb
ldw a0, (t0, 0)
lrw t1, __libc_start_main@PLT
ldr.w t1, (gb, t1 << 0)
jsr t1
lrw t1, abort@PLT
ldr.w t1, (gb, t1 << 0)
jsr t1
#else
/* Fetch address of __libc_csu_fini. */
lrw a0, __libc_csu_fini
/* Push __libc_csu_fini */
stw a0, (sp, 0)
/* Set up the other arguments in registers. */
lrw a0, main
lrw a3, __libc_csu_init
/* Let the libc call main and exit with its return code. */
jsri __libc_start_main
/* Should never get here. */
jsri abort
#endif /* !SHARED */
cfi_endproc
.size _start,.-_start
/* Define a symbol for the first piece of initialized data. */
.data
.globl __data_start
__data_start:
.long 0
.weak data_start
data_start = __data_start
|
