Linux设备驱动开发入门教程

版权申诉

137 浏览量更新于2024-09-01 收藏 403KB PDF 举报

"《写作Linux设备驱动程序：一个简短教程》是一本面向初学者的Linux设备驱动开发指南。该教程旨在帮助读者理解如何像真正的内核开发者一样编写驱动程序，重现Minix-1.1时代程序员亲手编写设备驱动的黄金时期。为了成功进行Linux设备驱动的开发，预习以下基础知识至关重要： 1. C编程基础：教程强调了深入掌握C语言是必要的，包括指针的使用、位操作函数等。对于任何设备驱动开发人员来说，对这些概念的精通至关重要。 2. 微处理器编程：理解计算机内部工作原理是基础，这涉及内存寻址、中断处理等概念。作为开发者，你需要熟悉这些在汇编语言编程中的应用，因为设备驱动往往与底层硬件紧密相连。作者Xavier Calbet可能以调侃的方式引出了这个主题，引用了Linus Torvalds的话，暗示在Linux世界中重拾编写驱动的乐趣，就像Minix-1.1时代那样。对于那些怀念过去手工编写驱动的开发者，或者希望进入Linux内核开发领域的人来说，这本书提供了实用的入门指引。订阅Free Software Magazine可以获取高清彩色版本的文章，每周更新的新闻通讯将带来更多关于自由软件的深度文章。订阅链接位于文末，为有兴趣进一步学习的读者提供了丰富的资源。本书适合对计算机硬件有基本了解，尤其是对C语言和微处理器原理有一定认识的读者。通过阅读，他们将能够系统地学习Linux设备驱动开发的步骤和技巧，提升自己的技术能力。"

HACKER’Ｓ CODE

Figure 1. User spacewhere applications reside, and kernel space

where modules or device drivers reside

Table 1. Device driver events and their associatedinterfacing func-

tions in kernel spaceand user space.

Events User functions Kernel func-

tions

Load module

Open device

Read device

Write device

Close device

Remove mod-

ule

Usually, for eachfunction in user space(allowing the use of

devicesor ?les), there exists an equivalent in kernel space

(allowing the transfer of information from the kernel to the

userand vice-versa). This is shown in Table 1, which is, at

this point, empty. It will be ?lled when the different device

drivers concepts areintroduced.

Interfacing functions between kernel space

and the hardware device

There are also functions in kernel spacewhich control the

device or exchangeinformation between the kernel and the

Table2. Device driver eventsand their associatedfunctions between

kernel spaceand thehardware device.

Events Kernel functions

Readdata

Write data

hardware. Table 2 illustrates theseconcepts. This table will

also be ?lled as the conceptsare introduced.

The ?rst driver: loading and removing the

driver in user space

I ’llnow show you how to develop your ?rst Linux device

driver, which will be introduced in the kernel asa module.

For this purpose I ’llwrite the following program in a ?le

namednothing.c

< nothing.c> =

#include <linux/module.h>

MODULE_LICENSE("Dual BSD/GPL");

Since the release of kernel version 2.6.x, compiling mod-

ules hasbecomeslightly more complicated. First, you need

to have a complete, compiled kernel source-code-tree. If

you have a Debian Sargesystem, you can follow the steps

in Appendix B (towards the end of this article). In the fol-

lowing, I ’llassumethat a kernel version 2.6.8 is being used.

Next, you needto generatea make?le. The make?le for this

example, which should be namedMakefile , will be:

< Make?le1> =

obj-m := nothing.o

Unlike with previous versions of the kernel, it ’ｓnow also

necessaryto compile the module using the samekernel that

you’regoing to load and usethe module with. To compile

it, you can type:

$ make -C /usr/src/kernel-source-2.6.8

M=‘pwd‘ modules

This extremely simple module belongs to kernel spaceand

will form part of it once it ’ｓloaded.

In user space,you can load the module asroot by typing the

following into the command line:

# insmod nothing.ko

2 Free Software Magazine Issue 11, March/April 2006

剩余13页未读，继续阅读

zisuifeng

粉丝: 0
资源: 5万+

Linux设备驱动开发入门教程

[游戏设计-编程电子书小合集].Linux.3D.Graphics.Programming.pdf

课题立项申请 .pdf

ctf全栈指南(入门篇).pdf

markdownpad2 markdown 语法说明(简体中文版).pdf

研究生英语读写教程pdf

20230421-吴林.pdf

markdown教程pdf

typora0.11.18 linux

新发展研究生英语综合教程2pdf

结构化写作 卢卓元 pdf

最新资源

结构化写作卢卓元 pdf