QEMU DEBUG SERIAL
> reliably connect windbg to the emulated serial port using a named pipe. > this a year or two ago when bringing up raspberry pi. > protocol and qemu's polling-based implementation of named pipe IO. > combination of windbg's tight timing requirements for the serial debug > Just a guess, but I suspect the problem you're seeing may be due to the > a bunch of output about the target state when it attaches. > Is this expected? In regular remote kernel debugging, windbg produces > Windbg doesn't print anything, it's still showing: > FS base passes all the checks in windbg_on_load() as the guest kernel > I just noticed this thread, and the problem sounded very familiar. Then, doing make -j$(nproc) bzImage is sufficient.Re: Windbg supporting
QEMU DEBUG DRIVERS
Device drivers \(\rightarrow\) Block devices \(\rightarrow\) Virtio block driver Ī kernel module’s menu option may have three states:.Device drivers \(\rightarrow\) Network device support \(\rightarrow\) Virtio network driver.If you are later going to run & debug with QEMU, these options must be selected as built-in: Tweak any options you need (e.g., turning off KPTI, KASLR, …). # Tweak options & save the config to default name # If you are later going to run with QEMU, make sure to # read the paragraphs below.Ī graphical menu should now pop up in the terminal.
QEMU DEBUG INSTALL
This workflow has been tested on x86_64 arch, Ubuntu 18.04/20.04 LTS, with Linux kernel versions 4.1 - 5.15.įirst, install the required dependencies (common things shipped with Ubuntu are not listed here):Ĭd linux-v.x.y # The root folder of the Linux source. This post lists a successful workflow of building and installing a custom Linux kernel under a Ubuntu 18.04/20.04 environment (deb), along with steps to debug the Linux kernel by running it over the QEMU emulator and attaching to GDB. When doing systems research, we sometimes need to modify/add new stuff into the Linux kernel. Hosted on GitHub Pages - Theme by orderedlist Building a Custom Linux Kernel & Debugging via QEMU + GDB Guanzhou's personal storage for lecture notes, blog posts, & good mood.