LC

Debug a Kernel Module with QEMU + GDB Remote

hard5/8

Use rr Record-and-Replay for Time-Travel Debugging Analyze a Coredump Post-Mortem

Language

Compiler

2.0s Limit 256MB

Implementation

Write a C program that documents the QEMU + GDB remote debugging workflow for kernel development.

Requirements:

Print the QEMU command-line flags for GDB stub (-s, -S)
Show the GDB commands to connect and debug
Explain how to set breakpoints in kernel code
Output must mention QEMU, GDB remote, and kernel
Demonstrate understanding of remote debugging concepts

Why This Matters

This exact `-s -S` plus `target remote localhost:1234` workflow is how Linux kernel developers debug boot-time crashes and how security researchers step through custom kernel modules without needing a second physical machine. It is the standard technique documented in the Linux kernel's own Documentation/dev-tools/gdb-kernel-debugging.rst.

Hints

0 / 3 revealed

Validation Suite

main.c

Workspace 1.0