Our objective in this chapter is to introduce the basics of Linux device drivers. We’ll begin with the concept of installable kernel modules. Then we’ll look at the basic device driver APIs in the ...

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The Linux kernel is a monolithic kernel. It’s mainly one large program, but it closely interacts with other, distinct, programs such as drivers and kernel modules.

For example, you probably don’t want to put drivers for every single known video card in your kernel. But it is perfectly fine to build dozens or hundreds of modules you might need and then load ...

I will discuss some of the fun things you can do by altering and wrapping system calls a little later, but let us first get our hands dirty with an example kernel module. This is a simple example, ...

Our example uses the 2.5.31 kernel release, which contains enough of the LSM interface for us to create a useful module. In our module, we want to prevent any programs with the group ID of 0 (root) ...

The 6.16 version of the kernel has Rust for Linux improvements to fix race conditions. Kernel updates tend to release every two months, so ongoing Rust work is current, and the project is still very ...

I suppose if you're still running the obsolete Red Hat Enterprise Linux (RHEL) 6 you might have to worry. Of course, the fix for signing Linux kernel modules has been available for RHEL 6 since 2012.

In this second excerpt, Abbott discusses kernel modules and device drivers. In Part 1 of this excerpt the author worked through an example of a simple kernel module. In this installment, Abbott ...