Using a custom kernel and loader.o
Plenty of other people have already written HOWTO's. You must have udev installed or the 2.6 kernel will not work. Check out The complete Gentoo Linux 2.6 migration guide. Other useful pages are Applying a Kernel Patch and General Kernel Build
Preparing for Install
Download the vanilla kernel source, untar it, and move into the source directory.
cd /usr/src wget ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-2.6.15.tar.bz2 tar xvjf linux-2.6.15.tar.bz2 cd linux-2.6.15
Download the latest kernel patch and apply it. You may need to adjust the name of the patch. The patch should support both the standard Kurobox and HG model. Please report any changes needed to the config files, or any bugs you find, on the forums. Remember to include the type of box you are running, along with any supporting information-- the more information the better.
wget http://www.kurobox.com/downloads/kernel/kurobox-patch-2-6-15.tar.bz2 tar xvjf kurobox-patch-2-6-15-tar.bz2 patch -p1 < kurobox-patch-2-6-15.patch
Configure the Kernel
Next we need to configure the kernel. There is a basic configuration with each patch.
For the standard Kurobox do this:
cp config_kurobox .config
For the Kurobox HG do this:
cp config_kuroboxhg .config
If you want to use the standard kernel type this:
If you want to customize your kernel type this:
Compile and Prepare the Kernel
Make the kernel and make and install the modules
make vmlinux modules modules_install
loader.o will need a binary of the new kernel, so we'll convert our new kernel and put it in /boot
objcopy -O binary vmlinux /boot/vmlinux-2.6.15-kurobox
Change to /boot
If you don't have a copy of loader.o in /boot you should download a copy from the Gentoo downloads area. I'm not sure if this one works with the HG, but it does work with the standard Kurobox.
Sync the drive, load the kernel into memory, and jump to the new kernel.
sync;insmod loader.o kernel=vmlinux-2.6.15-kurobox
If your new kernel works you can setup the Kurobox bootloader (more on this later).