深入剖析 printf 函数
Long Luo
第
3
页
2013/12/25
Copyright © 2013 Long Luo. All Rights Reserved.
Table Of Contents
Revision History................................................................................................................................ 2
Table Of Contents................................................................................................................................3
一、引子.............................................................................................................................................4
二、如何不借助第三方库实现 printf 函数？..................................................................................5
1.1 内核的诱惑..........................................................................................................................5
1.2 用 printf 撕开一个小小的口子...........................................................................................5
1.3 Linux 系统调用.................................................................................................................... 7
1.4 如何使用 Linux 系统调用？.............................................................................................. 7
1.5 用汇编语言实现 "Hello World".........................................................................................8
1.6 胜利的果实........................................................................................................................11
三、形参列表和格式化输出是如何实现的？.............................................................................. 12
3.1 格式化输出........................................................................................................................12
3.2 形参列表的读入................................................................................................................12
3.3 参数格式化输出................................................................................................................15
3.4 应用层的使用....................................................................................................................27
结束语............................................................................................................................................... 30
