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kbuild: deb-pkg: split image and debug objects staging out into funct…
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…ions

Prepare for the refactoring in the next commit.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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Masahiro Yamada committed Mar 15, 2023
1 parent f50aa51 commit b611daa
Showing 1 changed file with 116 additions and 106 deletions.
222 changes: 116 additions & 106 deletions scripts/package/builddeb
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,115 @@ create_package() {
dpkg-deb $dpkg_deb_opts ${KDEB_COMPRESS:+-Z$KDEB_COMPRESS} --build "$pdir" ..
}

install_linux_image () {
pdir=$1
pname=$2

rm -rf ${pdir}

# Only some architectures with OF support have this target
if is_enabled CONFIG_OF_EARLY_FLATTREE && [ -d "${srctree}/arch/${SRCARCH}/boot/dts" ]; then
${MAKE} -f ${srctree}/Makefile INSTALL_DTBS_PATH="${pdir}/usr/lib/linux-image-${KERNELRELEASE}" dtbs_install
fi

if is_enabled CONFIG_MODULES; then
${MAKE} -f ${srctree}/Makefile INSTALL_MOD_PATH="${pdir}" modules_install
rm -f "${pdir}/lib/modules/${KERNELRELEASE}/build"
rm -f "${pdir}/lib/modules/${KERNELRELEASE}/source"
if [ "${SRCARCH}" = um ] ; then
mkdir -p "${pdir}/usr/lib/uml/modules"
mv "${pdir}/lib/modules/${KERNELRELEASE}" "${pdir}/usr/lib/uml/modules/${KERNELRELEASE}"
fi
fi

# Install the kernel
if [ "${ARCH}" = um ] ; then
mkdir -p "${pdir}/usr/bin" "${pdir}/usr/share/doc/${pname}"
cp System.map "${pdir}/usr/lib/uml/modules/${KERNELRELEASE}/System.map"
cp ${KCONFIG_CONFIG} "${pdir}/usr/share/doc/${pname}/config"
gzip "${pdir}/usr/share/doc/${pname}/config"
else
mkdir -p "${pdir}/boot"
cp System.map "${pdir}/boot/System.map-${KERNELRELEASE}"
cp ${KCONFIG_CONFIG} "${pdir}/boot/config-${KERNELRELEASE}"
fi

# Not all arches have the same installed path in debian
# XXX: have each arch Makefile export a variable of the canonical image install
# path instead
case "${SRCARCH}" in
um)
installed_image_path="usr/bin/linux-${KERNELRELEASE}";;
parisc|mips|powerpc)
installed_image_path="boot/vmlinux-${KERNELRELEASE}";;
*)
installed_image_path="boot/vmlinuz-${KERNELRELEASE}";;
esac
cp "$(${MAKE} -s -f ${srctree}/Makefile image_name)" "${pdir}/${installed_image_path}"

# Install the maintainer scripts
# Note: hook scripts under /etc/kernel are also executed by official Debian
# kernel packages, as well as kernel packages built using make-kpkg.
# make-kpkg sets $INITRD to indicate whether an initramfs is wanted, and
# so do we; recent versions of dracut and initramfs-tools will obey this.
debhookdir=${KDEB_HOOKDIR:-/etc/kernel}
for script in postinst postrm preinst prerm; do
mkdir -p "${pdir}${debhookdir}/${script}.d"

mkdir -p "${pdir}/DEBIAN"
cat <<-EOF > "${pdir}/DEBIAN/${script}"
#!/bin/sh
set -e
# Pass maintainer script parameters to hook scripts
export DEB_MAINT_PARAMS="\$*"
# Tell initramfs builder whether it's wanted
export INITRD=$(if_enabled_echo CONFIG_BLK_DEV_INITRD Yes No)
test -d ${debhookdir}/${script}.d && run-parts --arg="${KERNELRELEASE}" --arg="/${installed_image_path}" ${debhookdir}/${script}.d
exit 0
EOF
chmod 755 "${pdir}/DEBIAN/${script}"
done
}

install_linux_image_dbg () {
pdir=$1
image_pdir=$2

rm -rf ${pdir}

for module in $(find ${image_pdir}/lib/modules/ -name *.ko -printf '%P\n'); do
module=lib/modules/${module}
mkdir -p $(dirname ${pdir}/usr/lib/debug/${module})
# only keep debug symbols in the debug file
${OBJCOPY} --only-keep-debug ${image_pdir}/${module} ${pdir}/usr/lib/debug/${module}
# strip original module from debug symbols
${OBJCOPY} --strip-debug ${image_pdir}/${module}
# then add a link to those
${OBJCOPY} --add-gnu-debuglink=${pdir}/usr/lib/debug/${module} ${image_pdir}/${module}
done

# re-sign stripped modules
if is_enabled CONFIG_MODULE_SIG_ALL; then
${MAKE} -f ${srctree}/Makefile INSTALL_MOD_PATH="${image_pdir}" modules_sign
fi

# Build debug package
# Different tools want the image in different locations
# perf
mkdir -p ${pdir}/usr/lib/debug/lib/modules/${KERNELRELEASE}/
cp vmlinux ${pdir}/usr/lib/debug/lib/modules/${KERNELRELEASE}/
# systemtap
mkdir -p ${pdir}/usr/lib/debug/boot/
ln -s ../lib/modules/${KERNELRELEASE}/vmlinux ${pdir}/usr/lib/debug/boot/vmlinux-${KERNELRELEASE}
# kdump-tools
ln -s lib/modules/${KERNELRELEASE}/vmlinux ${pdir}/usr/lib/debug/vmlinux-${KERNELRELEASE}
}

deploy_kernel_headers () {
pdir=$1

Expand Down Expand Up @@ -105,106 +214,14 @@ deploy_libc_headers () {
}

version=$KERNELRELEASE
tmpdir=debian/linux-image
dbg_dir=debian/linux-image-dbg
packagename=linux-image-$version
dbg_packagename=$packagename-dbg

if [ "$ARCH" = "um" ] ; then
packagename=user-mode-linux-$version
fi

# Not all arches have the same installed path in debian
# XXX: have each arch Makefile export a variable of the canonical image install
# path instead
case $ARCH in
um)
installed_image_path="usr/bin/linux-$version"
;;
parisc|mips|powerpc)
installed_image_path="boot/vmlinux-$version"
;;
*)
installed_image_path="boot/vmlinuz-$version"
esac

BUILD_DEBUG=$(if_enabled_echo CONFIG_DEBUG_INFO Yes)

# Setup the directory structure
rm -rf "$tmpdir" "$dbg_dir" debian/files
mkdir -m 755 -p "$tmpdir/DEBIAN"
mkdir -p "$tmpdir/lib" "$tmpdir/boot"

# Install the kernel
if [ "$ARCH" = "um" ] ; then
mkdir -p "$tmpdir/usr/lib/uml/modules/$version" "$tmpdir/usr/bin" "$tmpdir/usr/share/doc/$packagename"
cp System.map "$tmpdir/usr/lib/uml/modules/$version/System.map"
cp $KCONFIG_CONFIG "$tmpdir/usr/share/doc/$packagename/config"
gzip "$tmpdir/usr/share/doc/$packagename/config"
else
cp System.map "$tmpdir/boot/System.map-$version"
cp $KCONFIG_CONFIG "$tmpdir/boot/config-$version"
fi
cp "$($MAKE -s -f $srctree/Makefile image_name)" "$tmpdir/$installed_image_path"

if is_enabled CONFIG_OF_EARLY_FLATTREE; then
# Only some architectures with OF support have this target
if [ -d "${srctree}/arch/$SRCARCH/boot/dts" ]; then
$MAKE -f $srctree/Makefile INSTALL_DTBS_PATH="$tmpdir/usr/lib/$packagename" dtbs_install
fi
fi

if is_enabled CONFIG_MODULES; then
INSTALL_MOD_PATH="$tmpdir" $MAKE -f $srctree/Makefile modules_install
rm -f "$tmpdir/lib/modules/$version/build"
rm -f "$tmpdir/lib/modules/$version/source"
if [ "$ARCH" = "um" ] ; then
mv "$tmpdir/lib/modules/$version"/* "$tmpdir/usr/lib/uml/modules/$version/"
rmdir "$tmpdir/lib/modules/$version"
fi
if [ -n "$BUILD_DEBUG" ] ; then
for module in $(find $tmpdir/lib/modules/ -name *.ko -printf '%P\n'); do
module=lib/modules/$module
mkdir -p $(dirname $dbg_dir/usr/lib/debug/$module)
# only keep debug symbols in the debug file
$OBJCOPY --only-keep-debug $tmpdir/$module $dbg_dir/usr/lib/debug/$module
# strip original module from debug symbols
$OBJCOPY --strip-debug $tmpdir/$module
# then add a link to those
$OBJCOPY --add-gnu-debuglink=$dbg_dir/usr/lib/debug/$module $tmpdir/$module
done

# resign stripped modules
if is_enabled CONFIG_MODULE_SIG_ALL; then
INSTALL_MOD_PATH="$tmpdir" $MAKE -f $srctree/Makefile modules_sign
fi
fi
fi

# Install the maintainer scripts
# Note: hook scripts under /etc/kernel are also executed by official Debian
# kernel packages, as well as kernel packages built using make-kpkg.
# make-kpkg sets $INITRD to indicate whether an initramfs is wanted, and
# so do we; recent versions of dracut and initramfs-tools will obey this.
debhookdir=${KDEB_HOOKDIR:-/etc/kernel}
for script in postinst postrm preinst prerm ; do
mkdir -p "$tmpdir$debhookdir/$script.d"
cat <<EOF > "$tmpdir/DEBIAN/$script"
#!/bin/sh
set -e
# Pass maintainer script parameters to hook scripts
export DEB_MAINT_PARAMS="\$*"
# Tell initramfs builder whether it's wanted
export INITRD=$(if_enabled_echo CONFIG_BLK_DEV_INITRD Yes No)
test -d $debhookdir/$script.d && run-parts --arg="$version" --arg="/$installed_image_path" $debhookdir/$script.d
exit 0
EOF
chmod 755 "$tmpdir/DEBIAN/$script"
done
rm -f debian/files

if [ "$ARCH" != "um" ]; then
if is_enabled CONFIG_MODULES; then
Expand All @@ -216,20 +233,13 @@ if [ "$ARCH" != "um" ]; then
create_package linux-libc-dev debian/linux-libc-dev
fi

create_package "$packagename" "$tmpdir"
install_linux_image debian/linux-image "$packagename"

if [ -n "$BUILD_DEBUG" ] ; then
# Build debug package
# Different tools want the image in different locations
# perf
mkdir -p $dbg_dir/usr/lib/debug/lib/modules/$version/
cp vmlinux $dbg_dir/usr/lib/debug/lib/modules/$version/
# systemtap
mkdir -p $dbg_dir/usr/lib/debug/boot/
ln -s ../lib/modules/$version/vmlinux $dbg_dir/usr/lib/debug/boot/vmlinux-$version
# kdump-tools
ln -s lib/modules/$version/vmlinux $dbg_dir/usr/lib/debug/vmlinux-$version
create_package "$dbg_packagename" "$dbg_dir"
if is_enabled CONFIG_DEBUG_INFO; then
install_linux_image_dbg debian/linux-image-dbg debian/linux-image
create_package "$dbg_packagename" debian/linux-image-dbg
fi

create_package "$packagename" debian/linux-image

exit 0

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