很好的图文讲解:http://kom118.blog.163.com/blog/static/47667318201071692422803/,函数调用栈
http://wenku.baidu.com/link?url=gCd3UNzl658MkR15zdlXRCbeAgPUxSkOS19ETW2d16uiPTOqFg-XZBgpQaUtjLhZa6NAxQ8xui51e7C5XQhW0YAlU_ZZvUmnUMJ2H5NLF57 ,变量与堆栈
http://blog.chinaunix.net/uid-7396260-id-2056757.html, 常用的寄存器