Shulou(Shulou.com)05/31 Report--

This article mainly explains "what is the learning method of Linux driver". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is the learning method of Linux driver".

1. Learn to write simple makefile

two。 Write an application program that can run with makefile

3. Learn to write makefile for linux drivers

4. Write a simple char driver, makefile compiled through, can insmod,lsmod,rmmod. After printing helloworld,insmod in the driver's init function, you should be able to see the output through dmesg.

5. Write a complete drive, plus the driver implementation of various functions such as read,write,ioctl,polling. Complete the implementation of transferring structures from user space to kernel space in ioctl.

6. Write a block driver plus read,write,ioctl,poll and other functions to achieve.

7. Easy to learn memory management, this is the most difficult, understand a variety of memoryalloc function implementation details. This is the basic skill of linux development.

8. Learning the application of the lock mechanism, which is not the most difficult but the most error-prone, involves a lot of synchronization and concurrency problems.

9. Look at the actual linux driver code in the kernel. You will find that the most basic you already know, the big framework is the same, nothing more than the implementation of functions such as read,write,ioctl, but it contains a lot of small implementation details that you didn't know before. At this point, you have to consider many other issues, not just the implementation of basic functions.

It is recommended that you take a look at a driver kvm of integrated in 2.6.20. Remember that it is under driver/lguest. It is fun to see the virtual machine driver under linux. The code is not long, but the function is powerful. Those who have the ability can write an operating system to make a disk image and load it into the virtual machine as required, and then the client can have its own 4G virtual address space.

10. After reading the linux driver code, welcome to Linuxkernel learning.

The easiest way to do this is to follow ldd (linuxdevivedriver).

Thank you for your reading, the above is the content of "what is the learning method of Linux driver". After the study of this article, I believe you have a deeper understanding of what the learning method of Linux driver is, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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