zhuowei / ironsand

Notes on testing VirtualBox's DevPlayground virtual device plugin sample on macOS

Example for running VirtualBox's virtual PCI device sample on macOS.

VirtualBox's standard macOS installation is sandboxed and prevents loading third-party virtual devices.

This repo provides a launcher that disables VirtualBox's sandbox, and a build script for VirtualBox's DevPlayground device sample.

This is tested against VirtualBox 6.1.8 - you might need to fix the hardcoded offset in vboxlauncher.c.

To run:

cd ironsand
vim build2.sh # Fix the include path to your VirtualBox source
./build2.sh

Create a VirtualBox VM with ICH9 chipset. Then:

sudo cp libDevPlayground.dylib /opt/ironsand/
VBoxManage setextradata vmname VBoxInternal/PDM/Devices/playground/Path /opt/ironsand/libDevPlayground.dylib
VBoxManage setextradata vmname VBoxInternal/Devices/playground/0/Config/Whatever1 0

clang -o vboxlauncher vboxlauncher.c
sudo ./vboxlauncher --startvm vmname

It will print:

39
attach to 57113

run

sudo lldb -p 57113

then

breakpoint set -F _dyld_get_image_name -c "$rdi==0" -C "print $rdi=39" -C "c"

License

The sample code is taken from VirtualBox, which is dual-licensed under GPL and CDDL.