EFI-Fun.md

Build OVMF

mostly from: https://git.alpinelinux.org/cgit/aports/tree/community/edk2/APKBUILD

docker run --rm -ti -v $(pwd):/out alpine
apk add --no-cache bash python2 iasl nasm util-linux-dev gcc musl-dev make g++ git

# need to clone in container as on Mac the host FS is not case sensitive
git clone git@github.com:tianocore/edk2.git

bash
cd edk2

. edksetup.sh
make -j1 -C BaseTools

export WORKSPACE=$PWD
export PACKAGES_PATH=$PWD
export EDK_TOOLS_PATH=$PWD/BaseTools/
export PATH=$PWD/BaseTools/BinWrappers/PosixLike/:$PATH

TOOLCHAIN=GCC49
RELEASE=DEBUG
TARGET_ARCH=X64
OVMFPKG=OvmfPkgX64.dsc
command build -b ${RELEASE} -a ${TARGET_ARCH} -p OvmfPkg/${OVMFPKG} -t ${TOOLCHAIN} -n ${JOBS:-2}

cp Build/OvmfX64/DEBUG_GCC49/FV/OVMF*.fd /out

Test in qemu

qemu-system-x86_64 -machine q35 -nographic -drive if=pflash,format=raw,file=./OVMF.fd

Boot LinuxKit images via EFI

• build a linuxkit image/initrd
• move them into a separate directory, sat ./foo
• rename the kernel to something ending in .efi, say bzImage.efi

Then start qemu:

qemu-system-x86_64 -machine q35 -nographic -drive if=pflash,format=raw,file=./OVMF.fd -drive file=fat:rw:./foo

This turns the directory ./foo into a fat formated hard disk on the fly.

On the EFI shell:

fs0:
bzImage.efi console=ttyS0 efi=debug initrd=/linuxkit-initrd.img

This cds into the the drive fs0 and then executes the kernel (via the EFI stub built into it) with the command line provided.