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1 /*****************************************************************
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2 * usys.S
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3 * by Zhiyi Huang, hzy@cs.otago.ac.nz
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4 * University of Otago
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5 *
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6 ********************************************************************/
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7
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8
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9
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10 #include "syscall.h"
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11 #include "traps.h"
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12
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13 /* This is clumsy, but don't know how to make it smart */
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14 .globl fork
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15 fork:
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16 push {lr}
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17 push {r3}
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18 push {r2}
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19 push {r1}
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20 push {r0}
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21 mov r0, #SYS_fork
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22 swi #T_SYSCALL
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23 pop {r1} /* to avoid overwrite of r0 */
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24 pop {r1}
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25 pop {r2}
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26 pop {r3}
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27 pop {lr}
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28 bx lr
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29
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30 .globl exit
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31 exit:
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32 push {lr}
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33 push {r3}
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34 push {r2}
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35 push {r1}
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36 push {r0}
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37 mov r0, #SYS_exit
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38 swi #T_SYSCALL
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39 pop {r1} /* to avoid overwrite of r0 */
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40 pop {r1}
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41 pop {r2}
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42 pop {r3}
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43 pop {lr}
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44 bx lr
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45
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46 .globl wait
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47 wait:
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48 push {lr}
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49 push {r3}
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50 push {r2}
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51 push {r1}
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52 push {r0}
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53 mov r0, #SYS_wait
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54 swi #T_SYSCALL
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55 pop {r1} /* to avoid overwrite of r0 */
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56 pop {r1}
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57 pop {r2}
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58 pop {r3}
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59 pop {lr}
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60 bx lr
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61
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62 .globl pipe
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63 pipe:
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64 push {lr}
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65 push {r3}
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66 push {r2}
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67 push {r1}
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68 push {r0}
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69 mov r0, #SYS_pipe
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70 swi #T_SYSCALL
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71 pop {r1} /* to avoid overwrite of r0 */
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72 pop {r1}
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73 pop {r2}
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74 pop {r3}
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75 pop {lr}
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76 bx lr
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77
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78 .globl read
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79 read:
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80 push {lr}
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81 push {r3}
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82 push {r2}
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83 push {r1}
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84 push {r0}
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85 mov r0, #SYS_read
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86 swi #T_SYSCALL
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87 pop {r1} /* to avoid overwrite of r0 */
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88 pop {r1}
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89 pop {r2}
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90 pop {r3}
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91 pop {lr}
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92 bx lr
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93
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94 .globl write
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95 write:
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96 push {lr}
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97 push {r3}
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98 push {r2}
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99 push {r1}
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100 push {r0}
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101 mov r0, #SYS_write
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102 swi #T_SYSCALL
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103 pop {r1} /* to avoid overwrite of r0 */
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104 pop {r1}
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105 pop {r2}
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106 pop {r3}
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107 pop {lr}
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108 bx lr
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109
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110 .globl close
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111 close:
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112 push {lr}
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113 push {r3}
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114 push {r2}
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115 push {r1}
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116 push {r0}
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117 mov r0, #SYS_close
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118 swi #T_SYSCALL
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119 pop {r1} /* to avoid overwrite of r0 */
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120 pop {r1}
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121 pop {r2}
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122 pop {r3}
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123 pop {lr}
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124 bx lr
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125
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126
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127 .globl kill
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128 kill:
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129 push {lr}
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130 push {r3}
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131 push {r2}
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132 push {r1}
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133 push {r0}
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134 mov r0, #SYS_kill
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135 swi #T_SYSCALL
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136 pop {r1} /* to avoid overwrite of r0 */
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137 pop {r1}
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138 pop {r2}
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139 pop {r3}
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140 pop {lr}
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141 bx lr
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142
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143 .globl exec
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144 exec:
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145 push {lr}
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146 push {r3}
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147 push {r2}
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148 push {r1}
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149 push {r0}
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150 mov r0, #SYS_exec
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151 swi #T_SYSCALL
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152 pop {r1} /* to avoid overwrite of r0 */
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153 pop {r1}
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154 pop {r2}
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155 pop {r3}
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156 pop {lr}
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157 bx lr
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158
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159 .globl open
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160 open:
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161 push {lr}
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162 push {r3}
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163 push {r2}
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164 push {r1}
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165 push {r0}
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166 mov r0, #SYS_open
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167 swi #T_SYSCALL
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168 pop {r1} /* to avoid overwrite of r0 */
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169 pop {r1}
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170 pop {r2}
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171 pop {r3}
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172 pop {lr}
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173 bx lr
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174
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175 .globl mknod
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176 mknod:
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177 push {lr}
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178 push {r3}
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179 push {r2}
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180 push {r1}
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181 push {r0}
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182 mov r0, #SYS_mknod
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183 swi #T_SYSCALL
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184 pop {r1} /* to avoid overwrite of r0 */
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185 pop {r1}
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186 pop {r2}
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187 pop {r3}
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188 pop {lr}
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189 bx lr
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190
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191 .globl unlink
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192 unlink:
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193 push {lr}
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194 push {r3}
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195 push {r2}
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196 push {r1}
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197 push {r0}
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198 mov r0, #SYS_unlink
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199 swi #T_SYSCALL
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200 pop {r1} /* to avoid overwrite of r0 */
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201 pop {r1}
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202 pop {r2}
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203 pop {r3}
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204 pop {lr}
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205 bx lr
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206
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207 .globl fstat
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208 fstat:
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209 push {lr}
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210 push {r3}
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211 push {r2}
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212 push {r1}
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213 push {r0}
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214 mov r0, #SYS_fstat
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215 swi #T_SYSCALL
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216 pop {r1} /* to avoid overwrite of r0 */
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217 pop {r1}
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218 pop {r2}
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219 pop {r3}
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220 pop {lr}
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221 bx lr
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222
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223 .globl link
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224 link:
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225 push {lr}
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226 push {r3}
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227 push {r2}
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228 push {r1}
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229 push {r0}
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230 mov r0, #SYS_link
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231 swi #T_SYSCALL
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232 pop {r1} /* to avoid overwrite of r0 */
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233 pop {r1}
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234 pop {r2}
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235 pop {r3}
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236 pop {lr}
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237 bx lr
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238
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239 .globl mkdir
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240 mkdir:
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241 push {lr}
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242 push {r3}
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243 push {r2}
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244 push {r1}
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245 push {r0}
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246 mov r0, #SYS_mkdir
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247 swi #T_SYSCALL
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248 pop {r1} /* to avoid overwrite of r0 */
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249 pop {r1}
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250 pop {r2}
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251 pop {r3}
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252 pop {lr}
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253 bx lr
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254
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255 .globl chdir
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256 chdir:
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257 push {lr}
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258 push {r3}
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259 push {r2}
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260 push {r1}
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261 push {r0}
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262 mov r0, #SYS_chdir
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263 swi #T_SYSCALL
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264 pop {r1} /* to avoid overwrite of r0 */
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265 pop {r1}
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266 pop {r2}
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267 pop {r3}
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268 pop {lr}
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269 bx lr
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270
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271 .globl dup
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272 dup:
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273 push {lr}
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274 push {r3}
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275 push {r2}
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276 push {r1}
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277 push {r0}
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278 mov r0, #SYS_dup
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279 swi #T_SYSCALL
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280 pop {r1} /* to avoid overwrite of r0 */
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281 pop {r1}
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282 pop {r2}
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283 pop {r3}
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284 pop {lr}
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285 bx lr
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286
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287 .globl getpid
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288 getpid:
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289 push {lr}
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290 push {r3}
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291 push {r2}
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292 push {r1}
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293 push {r0}
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294 mov r0, #SYS_getpid
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295 swi #T_SYSCALL
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296 pop {r1} /* to avoid overwrite of r0 */
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297 pop {r1}
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298 pop {r2}
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299 pop {r3}
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300 pop {lr}
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301 bx lr
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302
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303 .globl sbrk
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304 sbrk:
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305 push {lr}
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306 push {r3}
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307 push {r2}
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308 push {r1}
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309 push {r0}
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310 mov r0, #SYS_sbrk
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311 swi #T_SYSCALL
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312 pop {r1} /* to avoid overwrite of r0 */
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313 pop {r1}
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314 pop {r2}
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315 pop {r3}
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316 pop {lr}
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317 bx lr
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318
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319 .globl sleep
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320 sleep:
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321 push {lr}
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322 push {r3}
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323 push {r2}
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324 push {r1}
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325 push {r0}
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326 mov r0, #SYS_sleep
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327 swi #T_SYSCALL
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328 pop {r1} /* to avoid overwrite of r0 */
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329 pop {r1}
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330 pop {r2}
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331 pop {r3}
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332 pop {lr}
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333 bx lr
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334
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335 .globl uptime
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336 uptime:
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337 push {lr}
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338 push {r3}
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339 push {r2}
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340 push {r1}
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341 push {r0}
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342 mov r0, #SYS_uptime
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343 swi #T_SYSCALL
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344 pop {r1} /* to avoid overwrite of r0 */
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345 pop {r1}
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346 pop {r2}
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347 pop {r3}
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348 pop {lr}
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349 bx lr
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350
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351
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352 /*
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353 SYSCALL(fork)
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354 SYSCALL(exit)
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355 SYSCALL(wait)
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356 SYSCALL(pipe)
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357 SYSCALL(read)
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358 SYSCALL(write)
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359 SYSCALL(close)
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360 SYSCALL(kill)
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361 SYSCALL(exec)
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362 SYSCALL(open)
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363 SYSCALL(mknod)
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364 SYSCALL(unlink)
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365 SYSCALL(fstat)
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366 SYSCALL(link)
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367 SYSCALL(mkdir)
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368 SYSCALL(chdir)
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369 SYSCALL(dup)
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370 SYSCALL(getpid)
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371 SYSCALL(sbrk)
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372 SYSCALL(sleep)
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373 SYSCALL(uptime)
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374 */
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