Debugging Linux Kernel in Deep – Part 2 | Operating Systems Online Course by Udemy

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Debugging Linux Kernel in Deep – Part 2

User space processes can be debugged using gdb. With gdb you cansingle-step, stop, resume, put break-points, inspect memory and variables, look through call stack informationWhat 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 ArchitectureUser 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 connectionIn this course we will learn: How to setup KGDBVarious ways of getting the target into development machineSetting BreakpointsPrinting and Setting VariablesUsing a single serial port for both kgdb and console messagesGetting the kernel messages in gdb windowDebugging Linux Kernel Modules (In-Tree, out of tree)Use of GDB Scripts present in the Linux Kernel

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