summaryrefslogtreecommitdiffstats
path: root/kernel/arch/score/lib/string.S
blob: 16efa3ad037f7cffbdbb4a5ffcf57a5d25325648 (plain)
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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
/*
 * arch/score/lib/string.S
 *
 * Score Processor version.
 *
 * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
 *  Chen Liqin <liqin.chen@sunplusct.com>
 *  Lennox Wu <lennox.wu@sunplusct.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/linkage.h>
#include <asm-generic/errno.h>

	.text
	.align 2
ENTRY(__strncpy_from_user)
	cmpi.c	r6, 0
	mv	r9, r6
	ble	.L2
0:	lbu	r7, [r5]
	ldi	r8, 0
1:	sb	r7, [r4]
2:	lb	r6, [r5]
	cmp.c	r6, r8
	beq	.L2

.L5:
	addi	r8, 1
	cmp.c	r8, r9
	beq	.L7
3:	lbu	r6, [r5, 1]+
4:	sb	r6, [r4, 1]+
5:	lb	r7, [r5]
	cmpi.c	r7, 0
	bne	.L5
.L7:
	mv	r4, r8
	br	r3
.L2:
	ldi	r8, 0
	mv	r4, r8
	br	r3
	.section .fixup, "ax"
99:
	ldi	r4, -EFAULT
	br	r3
	.previous
	.section __ex_table, "a"
	.align	2
	.word	0b ,99b
	.word	1b ,99b
	.word	2b ,99b
	.word	3b ,99b
	.word	4b ,99b
	.word	5b ,99b
	.previous

	.align 2
ENTRY(__strnlen_user)
	cmpi.c	r5, 0
	ble	.L11
0:	lb	r6, [r4]
	ldi	r7, 0
	cmp.c	r6, r7
	beq	.L11
.L15:
	addi	r7, 1
	cmp.c	r7, r5
	beq	.L23
1:	lb	r6, [r4,1]+
	cmpi.c	r6, 0
	bne	.L15
.L23:
	addri	r4, r7, 1
	br	r3

.L11:
	ldi	r4, 1
	br	r3
	.section .fixup, "ax"
99:
	ldi	r4, 0
	br	r3

	.section __ex_table,"a"
	.align 2
	.word	0b, 99b
	.word	1b, 99b
	.previous

	.align 2
ENTRY(__strlen_user)
0:	lb	r6, [r4]
	mv	r7, r4
	extsb	r6, r6
	cmpi.c	r6, 0
	mv	r4, r6
	beq	.L27
.L28:
1:	lb	r6, [r7, 1]+
	addi	r6, 1
	cmpi.c	r6, 0
	bne	.L28
.L27:
	br	r3
	.section .fixup, "ax"
	ldi	r4, 0x0
	br	r3
99:
	ldi	r4, 0
	br	r3
	.previous
	.section __ex_table, "a"
	.align	2
	.word	0b ,99b
	.word	1b ,99b
	.previous

	.align 2
ENTRY(__copy_tofrom_user)
	cmpi.c	r6, 0
	mv	r10,r6
	beq	.L32
	ldi	r9, 0
.L34:
	add	r6, r5, r9
0:	lbu	r8, [r6]
	add	r7, r4, r9
1:	sb	r8, [r7]
	addi	r9, 1
	cmp.c	r9, r10
	bne	.L34
.L32:
	ldi	r4, 0
	br	r3
	.section .fixup, "ax"
99:
	sub	r4, r10, r9
	br	r3
	.previous
	.section __ex_table, "a"
	.align	2
	.word	0b, 99b
	.word	1b, 99b
	.previous

	.align 2
ENTRY(__clear_user)
	cmpi.c	r5, 0
	beq	.L38
	ldi	r6, 0
	mv	r7, r6
.L40:
	addi	r6, 1
0:	sb	r7, [r4]+, 1
	cmp.c	r6, r5
	bne	.L40
.L38:
	ldi	r4, 0
	br	r3

	.section .fixup, "ax"
99:
	br	r3
	.previous
	.section __ex_table, "a"
	.align	2
	.word	0b, 99b
	.previous