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
|
/*
* Copyright (C) 2016 Andes Technology, Inc.
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
/* Startup code compliant to the ELF NDS32 ABI */
#include <sys/regdef.h>
#include <features.h>
#define BP_SYM(name) name
/* We need to call:
__uClibc_main (int (*main) (int, char **, char **), int argc,
char **argv, void (*init) (void), void (*fini) (void),
void (*rtld_fini) (void), void *stack_end)
*/
.text
.globl _start
.type _start,@function
.type _init,@function
.type _fini,@function
#ifndef __UCLIBC_CTOR_DTOR__
.weak _init
.weak _fini
#endif
.type main,@function
.type __uClibc_main,@function
#ifdef SHARED
.pic
1:
ret
#endif
_start:
movi $fp, 0 ! clear FP
lwi $r1, [$sp + 0] ! r1 = argc
addi $r2, $sp, 4 ! r2 = argv
/* align sp to 8-byte boundary */
movi $r0, -8
and $sp, $sp, $r0
addi $r6, $sp, 0 ! r6 = stack top
#ifdef SHARED
/* set gp register */
#ifdef __NDS32_N1213_43U1H__
jal 1b
sethi $gp, HI20(_GLOBAL_OFFSET_TABLE_)
ori $gp, $gp, LO12(_GLOBAL_OFFSET_TABLE_ + 4)
add $gp, $lp, $gp
#else
mfusr $r15, $PC
sethi $gp, HI20(_GLOBAL_OFFSET_TABLE_+4)
ori $gp, $gp, LO12(_GLOBAL_OFFSET_TABLE_ + 8)
add $gp, $r15, $gp
#endif
la $r3, _init@GOTOFF
la $r4, _fini@GOTOFF
la $r0, main@GOT
/* push everything to stack, r5 is rtld_fini and r7 is garbage */
pushm $r0, $r7
/* now start it up */
bal __uClibc_main@PLT
/* should never get here */
bal abort@PLT
#else
la $gp, _SDA_BASE_ ! init GP for small data access
la $r3, _init
la $r4, _fini
la $r0, main
/* push everything to stack, r5 is rtld_fini and r7 is garbage */
pushm $r0, $r7
/* now start it up */
bal __uClibc_main
/* should never get here */
bal abort
#endif
ret
/* 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
|
