# Linux Kernel Module Cheat

###### 17.12.2.1.1. QEMU xp

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:

    ./qemu-monitor 'xp 0x7c7b800'

Output:

    0000000007c7b800: 0x12345678

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

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