Linux Kernel Module Cheat

We source the Linux kernel GDB scripts by default for lx-symbols, but they also contains some other goodies worth looking into.

Those scripts basically parse some in-kernel data structures to offer greater visibility with GDB.

All defined commands are prefixed by lx-, so to get a full list just try to tab complete that.

There aren’t as many as I’d like, and the ones that do exist are pretty self explanatory, but let’s give a few examples.

Show dmesg:

Show the Kernel command line parameters:

Dump the device tree to a fdtdump.dtb file in the current directory:

List inserted kernel modules:

Sample output:

Bibliography: