arch/score/lib/string.S

   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(__copy_tofrom_user)
 108         cmpi.c  r6, 0
 109         mv      r10,r6
 110         beq     .L32
 111         ldi     r9, 0
 112 .L34:
 113         add     r6, r5, r9
 114 0:      lbu     r8, [r6]
 115         add     r7, r4, r9
 116 1:      sb      r8, [r7]
 117         addi    r9, 1
 118         cmp.c   r9, r10
 119         bne     .L34
 120 .L32:
 121         ldi     r4, 0
 122         br      r3
 123         .section .fixup, "ax"
 124 99:
 125         sub     r4, r10, r9
 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(__clear_user)
 136         cmpi.c  r5, 0
 137         beq     .L38
 138         ldi     r6, 0
 139         mv      r7, r6
 140 .L40:
 141         addi    r6, 1
 142 0:      sb      r7, [r4]+, 1
 143         cmp.c   r6, r5
 144         bne     .L40
 145 .L38:
 146         ldi     r4, 0
 147         br      r3
 148
 149         .section .fixup, "ax"
 150 99:
 151         br      r3
 152         .previous
 153         .section __ex_table, "a"
 154         .align  2
 155         .word   0b, 99b
 156         .previous