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annotate paper/src/xv6_syscall.cbc @ 131:988b3024d685

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author anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
date Mon, 08 Feb 2021 05:49:37 +0900
parents e25a073180de
children
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anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
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1 void syscall(void)
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anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
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2 {
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anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
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3 int num;
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anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
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4 int ret;
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anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
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5
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anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
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6 if((num >= NELEM(syscalls)) && (num <= NELEM(cbccodes)) && cbccodes[num]) {
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anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
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7 proc->cbc_arg.cbc_console_arg.num = num;
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anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
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8 goto (cbccodes[num])(cbc_ret);
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anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
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9 }