| Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 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 <liqin.chen@sunplusct.com> |
| 8 | * Lennox Wu <lennox.wu@sunplusct.com> |
| 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 |