kgdb

I recently set up a bhyve vm on my workstation for kernel development and figured others might be able to make use of my notes as well, because it's really quite easy. VM setup Download a FreeBSD disk image, i.e. 13.2-RELEASE if you're running 13.2. This version should match whatever kernel...

Hello! Good Monday to all the FreeBSD community. I am working on the FreeBSD kernel for my university thesis. The idea is to make changes to the FreeBSD short-time scheduler so that all its operations are based on the concept of Petri Nets. We already have the modeling of said scheduler and the...

Hi all, I am working on a kernel module but am getting some unexpected code execution. Dtrace probes reveal that the kernel executes: "rtwn.ko`r88ee_init_bb+0x219" and then jumps somewhere that I did not expect. I would like to track down exactly which line that is. I compiled the module with...

As of now I have installed the latest version of gdb via the package manager (7.9.1). The binary gets installed as /usr/local/bin/gdb which is apparently a symlink to /usr/local/bin/gdb791. The version which comes with the system is at /usr/bin/gdb which is an older version (v6.1.1). I have...

I am trying to hack/understand the nullfs kernel module so to that end, I do the following: On the target machine: kldstat gives: Id Refs Address Size Name 1 10 0xffffffff80200000 17e10c8 kernel 2 1 0xffffffff819e2000 4cf0 vmxnet.ko 3 1 0xffffffff819e7000 16e0...