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execve("/bin/sh", 0, 0) #59
rdi rsi rdx

orw

syscall: rax为2时open ,为1时write,为0时read。

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read( fd, buf, nbytes)
rdi rsi rdx
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open(file, oflag, vararg)
rdi rsi rdx
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write(fd, buf ,n)
rdi rsi rdx