1 | /*
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2 | * TOPPERS Software
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3 | * Toyohashi Open Platform for Embedded Real-Time Systems
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4 | *
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5 | * Copyright (C) 2000-2003 by Embedded and Real-Time Systems Laboratory
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6 | * Toyohashi Univ. of Technology, JAPAN
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7 | * Copyright (C) 2005-2014 by Embedded and Real-Time Systems Laboratory
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8 | * Graduate School of Information Science, Nagoya Univ., JAPAN
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9 | *
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10 | * ä¸è¨èä½æ¨©è
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11 | ã¯ï¼ä»¥ä¸ã®(1)ã(4)ã®æ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§
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12 | * ã¢ï¼æ¬ã½ããã¦ã§ã¢ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹
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13 | * å¤ã»åé
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14 | å¸ï¼ä»¥ä¸ï¼å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
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15 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
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16 | * 権表示ï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãï¼ãã®ã¾ã¾ã®å½¢ã§ã½ã¼
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17 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
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18 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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19 | * ç¨ã§ããå½¢ã§åé
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20 | å¸ããå ´åã«ã¯ï¼åé
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21 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
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22 | * è
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23 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
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24 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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25 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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26 | * ç¨ã§ããªãå½¢ã§åé
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27 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®ããããã®æ¡ä»¶ãæºããã
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28 | * ã¨ï¼
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29 | * (a) åé
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30 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
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31 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
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32 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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33 | * (b) åé
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34 | å¸ã®å½¢æ
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35 | ãï¼å¥ã«å®ããæ¹æ³ã«ãã£ã¦ï¼TOPPERSããã¸ã§ã¯ãã«
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36 | * å ±åãããã¨ï¼
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37 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
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38 | * 害ãããï¼ä¸è¨èä½æ¨©è
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39 | ããã³TOPPERSããã¸ã§ã¯ããå
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40 | 責ãããã¨ï¼
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41 | * ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®ã¦ã¼ã¶ã¾ãã¯ã¨ã³ãã¦ã¼ã¶ããã®ãããªãç
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42 | * ç±ã«åºã¥ãè«æ±ãããï¼ä¸è¨èä½æ¨©è
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43 | ããã³TOPPERSããã¸ã§ã¯ãã
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44 | * å
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45 | 責ãããã¨ï¼
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46 | *
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47 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
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48 | ã
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49 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ç¹å®ã®ä½¿ç¨ç®ç
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50 | * ã«å¯¾ããé©åæ§ãå«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§
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51 | * ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ã
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52 | * ã®è²¬ä»»ãè² ããªãï¼
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53 | *
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54 | * $Id: start.S 349 2015-07-25 05:25:27Z ertl-hiro $
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55 | */
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56 |
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57 | /*
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58 | * ã«ã¼ãã«ç¨ã®ã¹ã¿ã¼ãã¢ããã¢ã¸ã¥ã¼ã«ï¼ARMç¨ï¼
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59 | */
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60 |
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61 | #define TOPPERS_MACRO_ONLY
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62 | #define TOPPERS_ASM_MACRO
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63 | #define UINT_C(val) (val) /* uint_tåã®å®æ°ãä½ããã¯ã */
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64 | #define ULONG_C(val) (val) /* ulong_tåã®å®æ°ãä½ããã¯ã */
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65 | #define CAST(type, val) (val) /* åãã£ã¹ããè¡ããã¯ã */
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66 | #include "kernel_impl.h"
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67 | #include "core_asm.inc"
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68 |
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69 | ATEXT
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70 | AALIGN(2)
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71 | AGLOBAL(start)
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72 | ALABEL(start)
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73 | /*
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74 | * ããã»ããµã¢ã¼ãã®åæå
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75 | *
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76 | * ã¹ã¼ããã¤ã¶ã¢ã¼ãï¼å
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77 | ¨å²è¾¼ã¿ããã¯ç¶æ
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78 | ã«åæåããï¼
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79 | */
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80 | msr cpsr_cxsf, #(CPSR_SVC_MODE AOR CPSR_INTLOCK)
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81 |
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82 | /*
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83 | * ã¹ã¿ãã¯ãã¤ã³ã¿ã¨ãã¬ã¼ã ãã¤ã³ã¿ã®åæå
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84 | */
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85 | ldr r0, =_kernel_istkpt
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86 | ldr sp, [r0] /* ã¹ã¿ãã¯ãã¤ã³ã¿ï¼spï¼*/
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87 | mov fp, #0 /* ARMã¢ã¼ãç¨ãã¬ã¼ã ãã¤ã³ã¿ï¼r11ï¼*/
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88 | mov r7, #0 /* Thumbã¢ã¼ãç¨ãã¬ã¼ã ãã¤ã³ã¿ï¼r7ï¼*/
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89 |
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90 | /*
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91 | * hardware_init_hookã®å¼åºãï¼0ã§ãªãå ´åï¼
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92 | *
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93 | * ã¿ã¼ã²ãããã¼ãã¦ã§ã¢ã«ä¾åãã¦å¿
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94 | è¦ãªåæåå¦çãããå ´åã¯ï¼
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95 | * hardware_init_hookã¨ããé¢æ°ãç¨æããï¼
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96 | */
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97 | ldr r0, =hardware_init_hook
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98 | cmp r0, #0
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99 | movne lr, pc
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100 | bxne r0
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101 |
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102 | #ifndef TOPPERS_OMIT_BSS_INIT
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103 | /*
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104 | * bssã»ã¯ã·ã§ã³ã®ã¯ãªã¢
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105 | *
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106 | * BSS_STARTããBSS_ENDã¾ã§ãã¼ãã¯ãªã¢ããï¼
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107 | */
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108 | ldr r1, =BSS_START
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109 | ldr r2, =BSS_END
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110 | cmp r1, r2
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111 | bhs start_3
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112 | mov r0, #0
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113 | ALABEL(start_2)
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114 | str r0, [r1], #4
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115 | cmp r1, r2
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116 | blo start_2
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117 | ALABEL(start_3)
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118 | #endif /* TOPPERS_OMIT_BSS_INIT */
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119 |
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120 | #ifndef TOPPERS_OMIT_DATA_INIT
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121 | /*
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122 | * dataã»ã¯ã·ã§ã³ã®åæåï¼ROMå対å¿ï¼
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123 | *
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124 | * DATA_STARTããDATA_ENDã¾ã§ã«ï¼IDATA_START以éããã³ãã¼ããï¼
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125 | * IDATA_STARTããIDATA_ENDã¾ã§ãï¼DATA_START以éã«ã³ãã¼ããï¼
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126 | */
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127 | ldr r1, =DATA_START
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128 | ldr r3, =DATA_END
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129 | cmp r1, r3
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130 | bhs start_5
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131 | ldr r2, =IDATA_START
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132 | ALABEL(start_4)
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133 | ldr r0, [r2], #4
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134 | str r0, [r1], #4
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135 | cmp r1, r3
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136 | blo start_4
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137 | ALABEL(start_5)
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138 | #endif /* TOPPERS_OMIT_DATA_INIT */
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139 |
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140 | /*
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141 | * software_init_hookã®å¼åºãï¼0ã§ãªãå ´åï¼
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142 | *
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143 | * ã½ããã¦ã§ã¢ç°å¢ï¼ç¹ã«ã©ã¤ãã©ãªï¼ã«ä¾åãã¦å¿
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144 | è¦ãªåæåå¦çã
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145 | * ããå ´åã¯ï¼software_init_hookã¨ããé¢æ°ãç¨æããã°ããï¼
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146 | */
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147 | ldr r0, =software_init_hook
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148 | cmp r0, #0
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149 | movne lr, pc
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150 | bxne r0
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151 |
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152 | /*
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153 | * ã«ã¼ãã«ã®èµ·å
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154 | */
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155 | b sta_ker
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