#linux

Articles tagged with #linux

Debugging the Ubuntu 6.8 Kernel in GDB & QEMU — Without Rebuilding It
You can attach GDB to a stock Ubuntu 6.8 kernel running in QEMU and step through it with full symbols — no custom build, no kernel compile. The catch is a quiet one: you'll connect successfully, set a
Sep 17, 20265 min read
Cache Miss, TLB Miss, False Sharing — Three Killers Your Profiler Won't Name
top says both threads are at 100% CPU. Your profiler says the hot function is a simple counter increment. Everything looks busy and nothing looks wrong — and the program is still half as fast as it sh
Sep 16, 20266 min read
Building & Debugging a Custom ARM64 Linux Kernel — Yocto, QEMU, GDB
You can rebuild an ARM64 Linux kernel, boot it, and single-step through start_kernel in GDB without owning a single piece of ARM hardware. It runs on your laptop. The recipe is the easy part and it's
Sep 15, 20265 min read1