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174 lines
4.6 KiB
174 lines
4.6 KiB
# Copyright 2020-2023 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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# @ECLASS: dist-kernel-utils.eclass
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# @MAINTAINER:
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# Distribution Kernel Project <dist-kernel@gentoo.org>
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# @AUTHOR:
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# Michał Górny <mgorny@gentoo.org>
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# @SUPPORTED_EAPIS: 7 8
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# @BLURB: Utility functions related to Distribution Kernels
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# @DESCRIPTION:
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# This eclass provides various utility functions related to Distribution
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# Kernels.
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# @ECLASS_VARIABLE: KERNEL_EFI_ZBOOT
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# @DEFAULT_UNSET
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# @DESCRIPTION:
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# If set to a non-null value, it is assumed the kernel was built with
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# CONFIG_EFI_ZBOOT enabled. This effects the name of the kernel image on
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# arm64 and riscv. Mainly useful for sys-kernel/gentoo-kernel-bin.
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if [[ ! ${_DIST_KERNEL_UTILS} ]]; then
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case ${EAPI} in
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7|8) ;;
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*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
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esac
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inherit toolchain-funcs
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# @FUNCTION: dist-kernel_get_image_path
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# @DESCRIPTION:
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# Get relative kernel image path specific to the current ${ARCH}.
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dist-kernel_get_image_path() {
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case ${ARCH} in
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amd64|x86)
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echo arch/x86/boot/bzImage
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;;
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arm64|riscv)
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if [[ ${KERNEL_EFI_ZBOOT} ]]; then
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echo arch/${ARCH}/boot/vmlinuz.efi
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else
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echo arch/${ARCH}/boot/Image.gz
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fi
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;;
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loong)
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if [[ ${KERNEL_EFI_ZBOOT} ]]; then
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echo arch/loongarch/boot/vmlinuz.efi
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else
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echo arch/loongarch/boot/vmlinux.elf
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fi
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;;
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arm)
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echo arch/arm/boot/zImage
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;;
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hppa|ppc|ppc64|sparc)
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# https://www.kernel.org/doc/html/latest/powerpc/bootwrapper.html
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# ./ is required because of ${image_path%/*}
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# substitutions in the code
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echo ./vmlinux
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;;
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*)
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die "${FUNCNAME}: unsupported ARCH=${ARCH}"
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;;
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esac
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}
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# @FUNCTION: dist-kernel_install_kernel
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# @USAGE: <version> <image> <system.map>
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# @DESCRIPTION:
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# Install kernel using installkernel tool. <version> specifies
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# the kernel version, <image> full path to the image, <system.map>
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# full path to System.map.
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dist-kernel_install_kernel() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -eq 3 ]] || die "${FUNCNAME}: invalid arguments"
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local version=${1}
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local image=${2}
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local map=${3}
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ebegin "Installing the kernel via installkernel"
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# note: .config is taken relatively to System.map;
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# initrd relatively to bzImage
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ARCH=$(tc-arch-kernel) installkernel "${version}" "${image}" "${map}"
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eend ${?} || die -n "Installing the kernel failed"
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}
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# @FUNCTION: dist-kernel_reinstall_initramfs
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# @USAGE: <kv-dir> <kv-full>
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# @DESCRIPTION:
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# Rebuild and install initramfs for the specified dist-kernel.
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# <kv-dir> is the kernel source directory (${KV_DIR} from linux-info),
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# while <kv-full> is the full kernel version (${KV_FULL}).
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# The function will determine whether <kernel-dir> is actually
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# a dist-kernel, and whether initramfs was used.
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#
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# This function is to be used in pkg_postinst() of ebuilds installing
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# kernel modules that are included in the initramfs.
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dist-kernel_reinstall_initramfs() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -eq 2 ]] || die "${FUNCNAME}: invalid arguments"
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local kernel_dir=${1}
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local ver=${2}
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local image_path=${kernel_dir}/$(dist-kernel_get_image_path)
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if [[ ! -f ${image_path} ]]; then
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eerror "Kernel install missing, image not found:"
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eerror " ${image_path}"
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eerror "Initramfs will not be updated. Please reinstall your kernel."
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return
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fi
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dist-kernel_install_kernel "${ver}" "${image_path}" \
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"${kernel_dir}/System.map"
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}
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# @FUNCTION: dist-kernel_PV_to_KV
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# @USAGE: <pv>
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# @DESCRIPTION:
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# Convert a Gentoo-style ebuild version to kernel "x.y.z[-rcN]" version.
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dist-kernel_PV_to_KV() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -ne 1 ]] && die "${FUNCNAME}: invalid arguments"
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local pv=${1}
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local kv=${pv%%_*}
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[[ -z $(ver_cut 3- "${kv}") ]] && kv+=".0"
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[[ ${pv} == *_* ]] && kv+=-${pv#*_}
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echo "${kv}"
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}
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# @FUNCTION: dist-kernel_compressed_module_cleanup
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# @USAGE: <path>
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# @DESCRIPTION:
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# Traverse path for duplicate (un)compressed modules and remove all
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# but the newest variant.
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dist-kernel_compressed_module_cleanup() {
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debug-print-function ${FUNCNAME} "${@}"
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[[ ${#} -ne 1 ]] && die "${FUNCNAME}: invalid arguments"
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local path=${1}
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local basename f
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while read -r basename; do
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local prev=
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for f in "${path}/${basename}"{,.gz,.xz,.zst}; do
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if [[ ! -e ${f} ]]; then
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continue
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elif [[ -z ${prev} ]]; then
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prev=${f}
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elif [[ ${f} -nt ${prev} ]]; then
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rm -v "${prev}" || die
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prev=${f}
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else
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rm -v "${f}" || die
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fi
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done
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done < <(
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cd "${path}" &&
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find -type f \
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\( -name '*.ko' \
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-o -name '*.ko.gz' \
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-o -name '*.ko.xz' \
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-o -name '*.ko.zst' \
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\) | sed -e 's:[.]\(gz\|xz\|zst\)$::' | sort | uniq -d || die
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)
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}
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_DIST_KERNEL_UTILS=1
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fi
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