Chapter10.Adding Your Code to the Kernel

Chapter 10. Adding Your Code to the Kernel

In this chapter

• 10.1 Traversing the Source 554

• 10.2 Writing the Code 575

• 10.3 Building and Debugging 590

• Summary 591

• Exercises 593

This section is divided into two major parts: "Traversing the Source" and "Writing the Code."

"Traversing the Source" walks through a device driver common to nearly all Linux systems, /dev/random, and shows how the kernel connects with it. During this overview we recap some of the inner workings of the kernel we previously described and show them in a more practical light.

"Writing the Code" walks through building a device driver and delves into common situations that a developer will encounter when writing device drivers.

After those sections, we proceed to describe how you can debug a device driver using the /proc system. Maybe that's the third side to a coin?