kernel-build-Dockerfile

FROM alpine
MAINTAINER yalab <rudeboyjet@gmail.com>

RUN apk --update --no-cache add alpine-sdk ncurses-dev bc linux-headers perl
ENV ARCH="x86_64"

RUN git clone --depth 1 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git /linux

WORKDIR /linux

# docker build . -t kernel-build
# docker run -it -v /Users/yalab/vendor/linux:/linux kernel-build /bin/sh

# RUN cd /linux/linux && yes "" | make oldconfig
# //make x86_64_defconfig
# make menuconfig
# General setup -> Initial RAM filesystem and RAM disk support
# Device Drivers -> Block Devices -> Loopback Device Support
# make all && make modules

# $ qemu-system-x86_64 -kernel ./arch/bzImage


# $ docker exec $(docker ps -q) cat /linux/arch/x86_64/boot/bzImage > bzImage
# $ qemu-system-x86_64 -kernel bzImage

# $ echo -e '#include <stdio.h>\nint main(){\n  while(1){\n     printf("Hello kernel world\n");\n  }\n  return 0;\n}' > hello.c
# $ gcc -static hello.c -o hello
# $ echo hello | cpio -o -H newc > initramfs.img
# $ docker exec $(docker ps -q) cat /linux/boot/initramfs.img > initramfs.img