mirror of
https://github.com/linuxkit/linuxkit.git
synced 2025-10-31 13:41:19 +00:00
121 lines
4.0 KiB
Docker
121 lines
4.0 KiB
Docker
FROM linuxkit/alpine:9bcf61f605ef0ce36cc94d59b8eac307862de6e1 AS kernel-build
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RUN apk add \
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argp-standalone \
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automake \
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bash \
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bc \
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binutils-dev \
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bison \
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build-base \
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curl \
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diffutils \
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flex \
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git \
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gmp-dev \
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gnupg \
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installkernel \
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kmod \
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libelf-dev \
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libressl-dev \
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libunwind-dev \
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linux-headers \
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ncurses-dev \
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sed \
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squashfs-tools \
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tar \
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xz \
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xz-dev \
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zlib-dev
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ARG KERNEL_VERSION
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ARG KERNEL_SERIES
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ARG DEBUG
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ENV KERNEL_SOURCE=https://www.kernel.org/pub/linux/kernel/v4.x/linux-${KERNEL_VERSION}.tar.xz
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ENV KERNEL_SHA256_SUMS=https://www.kernel.org/pub/linux/kernel/v4.x/sha256sums.asc
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ENV KERNEL_PGP2_SIGN=https://www.kernel.org/pub/linux/kernel/v4.x/linux-${KERNEL_VERSION}.tar.sign
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# PGP keys: 589DA6B1 (greg@kroah.com) & 6092693E (autosigner@kernel.org) & 00411886 (torvalds@linux-foundation.org)
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COPY keys.asc keys.asc
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# Download and verify kernel
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RUN curl -fsSLO ${KERNEL_SHA256_SUMS} && \
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gpg2 -q --import keys.asc && \
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gpg2 --verify sha256sums.asc && \
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KERNEL_SHA256=$(grep linux-${KERNEL_VERSION}.tar.xz sha256sums.asc | cut -d ' ' -f 1) && \
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curl -fsSLO ${KERNEL_SOURCE} && \
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echo "${KERNEL_SHA256} linux-${KERNEL_VERSION}.tar.xz" | sha256sum -c - && \
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xz -d linux-${KERNEL_VERSION}.tar.xz && \
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curl -fsSLO ${KERNEL_PGP2_SIGN} && \
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gpg2 --verify linux-${KERNEL_VERSION}.tar.sign linux-${KERNEL_VERSION}.tar && \
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cat linux-${KERNEL_VERSION}.tar | tar --absolute-names -x && mv /linux-${KERNEL_VERSION} /linux
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COPY kernel_config-${KERNEL_SERIES} /linux/arch/x86/configs/x86_64_defconfig
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COPY kernel_config.debug /linux/debug_config
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RUN if [ -n "${DEBUG}" ]; then \
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sed -i 's/CONFIG_PANIC_ON_OOPS=y/# CONFIG_PANIC_ON_OOPS is not set/' /linux/arch/x86/configs/x86_64_defconfig; \
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cat /linux/debug_config >> /linux/arch/x86/configs/x86_64_defconfig; \
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fi
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# Apply local patches
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COPY patches-${KERNEL_SERIES} /patches
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WORKDIR /linux
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RUN set -e && for patch in /patches/*.patch; do \
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echo "Applying $patch"; \
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patch -p1 < "$patch"; \
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done
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RUN mkdir /out
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# Kernel
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RUN make defconfig && \
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make oldconfig && \
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make -j "$(getconf _NPROCESSORS_ONLN)" KCFLAGS="-fno-pie" && \
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cp arch/x86_64/boot/bzImage /out/kernel && \
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cp System.map /out && \
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([ -n "${DEBUG}" ] && cp vmlinux /out || true)
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# Modules
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RUN make INSTALL_MOD_PATH=/tmp/kernel-modules modules_install && \
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( DVER=$(basename $(find /tmp/kernel-modules/lib/modules/ -mindepth 1 -maxdepth 1)) && \
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cd /tmp/kernel-modules/lib/modules/$DVER && \
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rm build source && \
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ln -s /usr/src/linux-headers-$DVER build ) && \
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( cd /tmp/kernel-modules && tar cf /out/kernel.tar lib )
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# Headers (userspace API)
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RUN mkdir -p /tmp/kernel-headers/usr && \
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make INSTALL_HDR_PATH=/tmp/kernel-headers/usr headers_install && \
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( cd /tmp/kernel-headers && tar cf /out/kernel-headers.tar usr )
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# Headers (kernel development)
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RUN DVER=$(basename $(find /tmp/kernel-modules/lib/modules/ -mindepth 1 -maxdepth 1)) && \
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dir=/tmp/usr/src/linux-headers-$DVER && \
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mkdir -p $dir && \
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cp /linux/.config $dir && \
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cp /linux/Module.symvers $dir && \
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find . -path './include/*' -prune -o \
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-path './arch/*/include' -prune -o \
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-path './scripts/*' -prune -o \
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-type f \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
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-name '*.lds' -o -name '*.pl' -o -name '*.sh' \) | \
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tar cf - -T - | (cd $dir; tar xf -) && \
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( cd /tmp && tar cf /out/kernel-dev.tar usr/src )
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RUN printf "KERNEL_SOURCE=${KERNEL_SOURCE}\n" > /out/kernel-source-info
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# perf (Don't compile for 4.4.x, it's broken and tedious to fix)
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RUN if [ "${KERNEL_SERIES}" != "4.4.x" ]; then \
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mkdir -p /build/perf && \
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make -C tools/perf LDFLAGS=-static O=/build/perf && \
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strip /build/perf/perf && \
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cp /build/perf/perf /out; \
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fi
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FROM scratch
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ENTRYPOINT []
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CMD []
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WORKDIR /
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COPY --from=kernel-build /out/* /
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