http://staff.ustc.edu.cn/~sycheng/sst/exp_crack/ELF.pdf
https://refspecs.linuxbase.org/elf/TIS1.1.pdf
http://www.ibm.com/developerworks/cn/linux/l-excutff/
http://staff.ustc.edu.cn/~sycheng/sst/exp_crack/ELF.pdf
https://refspecs.linuxbase.org/elf/TIS1.1.pdf
http://www.ibm.com/developerworks/cn/linux/l-excutff/