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syscall.md

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@@ -181,7 +181,7 @@ RawSyscall 和 Syscall 的区别也非常微小,就只是在进入 Syscall 和
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RawSyscall 只是为了在执行那些一定不会阻塞的系统调用时,能节省两次对 runtime 的函数调用消耗。
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vdso:
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## vdso
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```go
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// func gettimeofday(tv *Timeval) (err uintptr)
@@ -677,3 +677,5 @@ func entersyscall_gcwait() {
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1. http://blog.studygolang.com/2016/06/go-syscall-intro/
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2. the linux programming interface
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3. https://mzh.io/golang-arm64-vdso

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