https://objectkuan.gitbooks.io/ucore-docs/lab1/lab1_3_2_2_address_space.html

http://www.kernel-panic.it/security/shellcode/shellcode5.html

https://www.exploit-db.com/docs/21013.pdf

http://shell-storm.org/shellcode/files/shellcode-841.php

http://blog.csdn.net/slvher/article/details/8864996

https://github.com/1184893257/simplelinux/blob/master/inlineasm.md

http://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html

https://dirtysalt.github.io/gcc-asm.html

http://tigerjibo.blog.51cto.com/7718010/1276026

http://www.linuxprobe.com/gcc-how-to.html

async demo样例网址：https://github.com/alsotang/async_demo

async网址：https://github.com/caolan/async

gcc内联汇编：http://tigerjibo.blog.51cto.com/7718010/1276026