forked from Minki/linux
185 lines
2.8 KiB
ArmAsm
185 lines
2.8 KiB
ArmAsm
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/*
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* arch/score/lib/string.S
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*
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* Score Processor version.
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*
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* Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
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* Chen Liqin <liqin.chen@sunplusct.com>
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* Lennox Wu <lennox.wu@sunplusct.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/linkage.h>
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#include <asm-generic/errno.h>
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.text
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.align 2
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ENTRY(__strncpy_from_user)
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cmpi.c r6, 0
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mv r9, r6
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ble .L2
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0: lbu r7, [r5]
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ldi r8, 0
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1: sb r7, [r4]
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2: lb r6, [r5]
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cmp.c r6, r8
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beq .L2
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.L5:
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addi r8, 1
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cmp.c r8, r9
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beq .L7
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3: lbu r6, [r5, 1]+
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4: sb r6, [r4, 1]+
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5: lb r7, [r5]
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cmpi.c r7, 0
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bne .L5
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.L7:
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mv r4, r8
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br r3
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.L2:
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ldi r8, 0
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mv r4, r8
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br r3
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.section .fixup, "ax"
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99:
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ldi r4, -EFAULT
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br r3
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.previous
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.section __ex_table, "a"
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.align 2
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.word 0b ,99b
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.word 1b ,99b
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.word 2b ,99b
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.word 3b ,99b
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.word 4b ,99b
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.word 5b ,99b
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.previous
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.align 2
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ENTRY(__strnlen_user)
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cmpi.c r5, 0
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ble .L11
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0: lb r6, [r4]
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ldi r7, 0
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cmp.c r6, r7
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beq .L11
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.L15:
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addi r7, 1
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cmp.c r7, r5
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beq .L23
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1: lb r6, [r4,1]+
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cmpi.c r6, 0
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bne .L15
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.L23:
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addri r4, r7, 1
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br r3
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.L11:
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ldi r4, 1
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br r3
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.section .fixup, "ax"
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99:
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ldi r4, 0
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br r3
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.section __ex_table,"a"
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.align 2
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.word 0b, 99b
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.word 1b, 99b
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.previous
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.align 2
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ENTRY(__strlen_user)
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0: lb r6, [r4]
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mv r7, r4
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extsb r6, r6
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cmpi.c r6, 0
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mv r4, r6
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beq .L27
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.L28:
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1: lb r6, [r7, 1]+
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addi r6, 1
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cmpi.c r6, 0
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bne .L28
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.L27:
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br r3
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.section .fixup, "ax"
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ldi r4, 0x0
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br r3
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99:
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ldi r4, 0
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br r3
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.previous
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.section __ex_table, "a"
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.align 2
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.word 0b ,99b
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.word 1b ,99b
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.previous
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.align 2
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ENTRY(__copy_tofrom_user)
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cmpi.c r6, 0
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mv r10,r6
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beq .L32
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ldi r9, 0
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.L34:
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add r6, r5, r9
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0: lbu r8, [r6]
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add r7, r4, r9
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1: sb r8, [r7]
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addi r9, 1
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cmp.c r9, r10
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bne .L34
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.L32:
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ldi r4, 0
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br r3
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.section .fixup, "ax"
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99:
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sub r4, r10, r9
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br r3
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.previous
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.section __ex_table, "a"
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.align 2
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.word 0b, 99b
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.word 1b, 99b
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.previous
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.align 2
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ENTRY(__clear_user)
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cmpi.c r5, 0
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beq .L38
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ldi r6, 0
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mv r7, r6
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.L40:
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addi r6, 1
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0: sb r7, [r4]+, 1
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cmp.c r6, r5
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bne .L40
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.L38:
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ldi r4, 0
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br r3
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.section .fixup, "ax"
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br r3
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.previous
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.section __ex_table, "a"
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.align 2
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99:
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.word 0b, 99b
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.previous
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