Udemy Debugging Linux Kernel in Deep - Part 2

KGDB, KDB, GDB


What you'll learn

• Debugging Linux Kernel Using KGDB
• KGDB on Raspberry Pi3

Requirements

• Should have basic knowledge of Linux Kernel

Description
User space processes can be debugged using gdb. With gdb you can

• single-step,
• stop,
• resume,
• put break-points,
• inspect memory and variables,
• look through call stack information

What if we can use gdb on running Linux Kernel.
Problem:
How can a gdb debug running kernel as it is just a user space process.
Solution:
Client/Server Architecture
User space programs can be debugged remotely using the combination of gdbserver on the target machine and gdb on the host machine/development machine.
The Linux kernel has a GDB Server implementation called KGDB. It communicates with a GDB client over network or serial port connection
In this course we will learn:

• How to setup KGDB
• Various ways of getting the target into development machine
• Setting Breakpoints
• Printing and Setting Variables
• Using a single serial port for both kgdb and console messages
• Getting the kernel messages in gdb window
• Debugging Linux Kernel Modules (In-Tree, out of tree)
• Use of GDB Scripts present in the Linux Kernel

Who this course is for:

• Kernel developers interested to learn various debugging techniques