Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/score/lib/string.S
10817 views
1
/*

2
 * arch/score/lib/string.S

3
 *

4
 * Score Processor version.

5
 *

6
 * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.

7
 *  Chen Liqin <[email protected]>

8
 *  Lennox Wu <[email protected]>

9
 *

10
 * This program is free software; you can redistribute it and/or modify

11
 * it under the terms of the GNU General Public License as published by

12
 * the Free Software Foundation; either version 2 of the License, or

13
 * (at your option) any later version.

14
 *

15
 * This program is distributed in the hope that it will be useful,

16
 * but WITHOUT ANY WARRANTY; without even the implied warranty of

17
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

18
 * GNU General Public License for more details.

19
 *

20
 * You should have received a copy of the GNU General Public License

21
 * along with this program; if not, see the file COPYING, or write

22
 * to the Free Software Foundation, Inc.,

23
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

24
 */

25


26
#include <linux/linkage.h>

27
#include <asm-generic/errno.h>

28


29
	.text

30
	.align 2

31
ENTRY(__strncpy_from_user)

32
	cmpi.c	r6, 0

33
	mv	r9, r6

34
	ble	.L2

35
0:	lbu	r7, [r5]

36
	ldi	r8, 0

37
1:	sb	r7, [r4]

38
2:	lb	r6, [r5]

39
	cmp.c	r6, r8

40
	beq	.L2

41


42
.L5:

43
	addi	r8, 1

44
	cmp.c	r8, r9

45
	beq	.L7

46
3:	lbu	r6, [r5, 1]+

47
4:	sb	r6, [r4, 1]+

48
5:	lb	r7, [r5]

49
	cmpi.c	r7, 0

50
	bne	.L5

51
.L7:

52
	mv	r4, r8

53
	br	r3

54
.L2:

55
	ldi	r8, 0

56
	mv	r4, r8

57
	br	r3

58
	.section .fixup, "ax"

59
99:

60
	ldi	r4, -EFAULT

61
	br	r3

62
	.previous

63
	.section __ex_table, "a"

64
	.align	2

65
	.word	0b ,99b

66
	.word	1b ,99b

67
	.word	2b ,99b

68
	.word	3b ,99b

69
	.word	4b ,99b

70
	.word	5b ,99b

71
	.previous

72


73
	.align 2

74
ENTRY(__strnlen_user)

75
	cmpi.c	r5, 0

76
	ble	.L11

77
0:	lb	r6, [r4]

78
	ldi	r7, 0

79
	cmp.c	r6, r7

80
	beq	.L11

81
.L15:

82
	addi	r7, 1

83
	cmp.c	r7, r5

84
	beq	.L23

85
1:	lb	r6, [r4,1]+

86
	cmpi.c	r6, 0

87
	bne	.L15

88
.L23:

89
	addri	r4, r7, 1

90
	br	r3

91


92
.L11:

93
	ldi	r4, 1

94
	br	r3

95
	.section .fixup, "ax"

96
99:

97
	ldi	r4, 0

98
	br	r3

99


100
	.section __ex_table,"a"

101
	.align 2

102
	.word	0b, 99b

103
	.word	1b, 99b

104
	.previous

105


106
	.align 2

107
ENTRY(__strlen_user)

108
0:	lb	r6, [r4]

109
	mv	r7, r4

110
	extsb	r6, r6

111
	cmpi.c	r6, 0

112
	mv	r4, r6

113
	beq	.L27

114
.L28:

115
1:	lb	r6, [r7, 1]+

116
	addi	r6, 1

117
	cmpi.c	r6, 0

118
	bne	.L28

119
.L27:

120
	br	r3

121
	.section .fixup, "ax"

122
	ldi	r4, 0x0

123
	br	r3

124
99:

125
	ldi	r4, 0

126
	br	r3

127
	.previous

128
	.section __ex_table, "a"

129
	.align	2

130
	.word	0b ,99b

131
	.word	1b ,99b

132
	.previous

133


134
	.align 2

135
ENTRY(__copy_tofrom_user)

136
	cmpi.c	r6, 0

137
	mv	r10,r6

138
	beq	.L32

139
	ldi	r9, 0

140
.L34:

141
	add	r6, r5, r9

142
0:	lbu	r8, [r6]

143
	add	r7, r4, r9

144
1:	sb	r8, [r7]

145
	addi	r9, 1

146
	cmp.c	r9, r10

147
	bne	.L34

148
.L32:

149
	ldi	r4, 0

150
	br	r3

151
	.section .fixup, "ax"

152
99:

153
	sub	r4, r10, r9

154
	br	r3

155
	.previous

156
	.section __ex_table, "a"

157
	.align	2

158
	.word	0b, 99b

159
	.word	1b, 99b

160
	.previous

161


162
	.align 2

163
ENTRY(__clear_user)

164
	cmpi.c	r5, 0

165
	beq	.L38

166
	ldi	r6, 0

167
	mv	r7, r6

168
.L40:

169
	addi	r6, 1

170
0:	sb	r7, [r4]+, 1

171
	cmp.c	r6, r5

172
	bne	.L40

173
.L38:

174
	ldi	r4, 0

175
	br	r3

176


177
	.section .fixup, "ax"

178
	br	r3

179
	.previous

180
	.section __ex_table, "a"

181
	.align	2

182
99:

183
	.word	0b, 99b

184
	.previous

185


186