| /* |
| * 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" |
| br r3 |
| .previous |
| .section __ex_table, "a" |
| .align 2 |
| 99: |
| .word 0b, 99b |
| .previous |
| |
| .align 2 |
| ENTRY(__put_user_unknown) |
| .set volatile |
| ldi r4, -EFAULT |
| br r3 |
| |
| .align 2 |
| ENTRY(__get_user_unknown) |
| ldi r5, 0 |
| ldi r4, -EFAULT |
| br r3 |
