Linux Kernel Module Cheat

The xp QEMU monitor command reads memory at a given physical address.

First launch linux/virt_to_phys_user.out as described at Userland physical address experiments.

On a second terminal, use QEMU to read the physical address:

Output:

Yes!!! We read the correct value from the physical address.

We could not find however to write to memory from the QEMU monitor, boring.