1#!/bin/sh
2#
3# builddeb 1.3
4# Copyright 2003 Wichert Akkerman <wichert@wiggy.net>
5#
6# Simple script to generate a deb package for a Linux kernel. All the
7# complexity of what to do with a kernel after it is installed or removed
8# is left to other scripts and packages: they can install scripts in the
9# /etc/kernel/{pre,post}{inst,rm}.d/ directories (or an alternative location
10# specified in KDEB_HOOKDIR) that will be called on package install and
11# removal.
12
13set -e
14
15is_enabled() {
16	grep -q "^$1=y" include/config/auto.conf
17}
18
19if_enabled_echo() {
20	if is_enabled "$1"; then
21		echo -n "$2"
22	elif [ $# -ge 3 ]; then
23		echo -n "$3"
24	fi
25}
26
27install_linux_image () {
28	pname=$1
29	pdir=debian/$1
30
31	# Only some architectures with OF support have this target
32	if is_enabled CONFIG_OF_EARLY_FLATTREE && [ -d "${srctree}/arch/${SRCARCH}/boot/dts" ]; then
33		${MAKE} -f ${srctree}/Makefile INSTALL_DTBS_PATH="${pdir}/usr/lib/linux-image-${KERNELRELEASE}" dtbs_install
34	fi
35
36	${MAKE} -f ${srctree}/Makefile INSTALL_MOD_PATH="${pdir}" INSTALL_MOD_STRIP=1 modules_install
37	rm -f "${pdir}/lib/modules/${KERNELRELEASE}/build"
38
39	# Install the kernel
40	if [ "${ARCH}" = um ] ; then
41		mkdir -p "${pdir}/usr/lib/uml/modules"
42		mv "${pdir}/lib/modules/${KERNELRELEASE}" "${pdir}/usr/lib/uml/modules/${KERNELRELEASE}"
43		mkdir -p "${pdir}/usr/bin" "${pdir}/usr/share/doc/${pname}"
44		cp System.map "${pdir}/usr/lib/uml/modules/${KERNELRELEASE}/System.map"
45		cp ${KCONFIG_CONFIG} "${pdir}/usr/share/doc/${pname}/config"
46		gzip "${pdir}/usr/share/doc/${pname}/config"
47	else
48		mkdir -p "${pdir}/boot"
49		cp System.map "${pdir}/boot/System.map-${KERNELRELEASE}"
50		cp ${KCONFIG_CONFIG} "${pdir}/boot/config-${KERNELRELEASE}"
51	fi
52
53	# Not all arches have the same installed path in debian
54	# XXX: have each arch Makefile export a variable of the canonical image install
55	# path instead
56	case "${SRCARCH}" in
57	um)
58		installed_image_path="usr/bin/linux-${KERNELRELEASE}";;
59	parisc|mips|powerpc)
60		installed_image_path="boot/vmlinux-${KERNELRELEASE}";;
61	*)
62		installed_image_path="boot/vmlinuz-${KERNELRELEASE}";;
63	esac
64	cp "$(${MAKE} -s -f ${srctree}/Makefile image_name)" "${pdir}/${installed_image_path}"
65
66	# Install the maintainer scripts
67	# Note: hook scripts under /etc/kernel are also executed by official Debian
68	# kernel packages, as well as kernel packages built using make-kpkg.
69	# make-kpkg sets $INITRD to indicate whether an initramfs is wanted, and
70	# so do we; recent versions of dracut and initramfs-tools will obey this.
71	debhookdir=${KDEB_HOOKDIR:-/etc/kernel}
72	for script in postinst postrm preinst prerm; do
73		mkdir -p "${pdir}${debhookdir}/${script}.d"
74
75		mkdir -p "${pdir}/DEBIAN"
76		cat <<-EOF > "${pdir}/DEBIAN/${script}"
77
78		#!/bin/sh
79
80		set -e
81
82		# Pass maintainer script parameters to hook scripts
83		export DEB_MAINT_PARAMS="\$*"
84
85		# Tell initramfs builder whether it's wanted
86		export INITRD=$(if_enabled_echo CONFIG_BLK_DEV_INITRD Yes No)
87
88		test -d ${debhookdir}/${script}.d && run-parts --arg="${KERNELRELEASE}" --arg="/${installed_image_path}" ${debhookdir}/${script}.d
89		exit 0
90		EOF
91		chmod 755 "${pdir}/DEBIAN/${script}"
92	done
93}
94
95install_linux_image_dbg () {
96	pdir=debian/$1
97
98	# Parse modules.order directly because 'make modules_install' may sign,
99	# compress modules, and then run unneeded depmod.
100	while read -r mod; do
101		mod="${mod%.o}.ko"
102		dbg="${pdir}/usr/lib/debug/lib/modules/${KERNELRELEASE}/kernel/${mod}"
103		buildid=$("${READELF}" -n "${mod}" | sed -n 's@^.*Build ID: \(..\)\(.*\)@\1/\2@p')
104		link="${pdir}/usr/lib/debug/.build-id/${buildid}.debug"
105
106		mkdir -p "${dbg%/*}" "${link%/*}"
107		"${OBJCOPY}" --only-keep-debug "${mod}" "${dbg}"
108		ln -sf --relative "${dbg}" "${link}"
109	done < modules.order
110
111	# Build debug package
112	# Different tools want the image in different locations
113	# perf
114	mkdir -p ${pdir}/usr/lib/debug/lib/modules/${KERNELRELEASE}/
115	cp vmlinux ${pdir}/usr/lib/debug/lib/modules/${KERNELRELEASE}/
116	# systemtap
117	mkdir -p ${pdir}/usr/lib/debug/boot/
118	ln -s ../lib/modules/${KERNELRELEASE}/vmlinux ${pdir}/usr/lib/debug/boot/vmlinux-${KERNELRELEASE}
119	# kdump-tools
120	ln -s lib/modules/${KERNELRELEASE}/vmlinux ${pdir}/usr/lib/debug/vmlinux-${KERNELRELEASE}
121}
122
123install_kernel_headers () {
124	pdir=debian/$1
125	version=${1#linux-headers-}
126
127	"${srctree}/scripts/package/install-extmod-build" "${pdir}/usr/src/linux-headers-${version}"
128
129	mkdir -p $pdir/lib/modules/$version/
130	ln -s /usr/src/linux-headers-$version $pdir/lib/modules/$version/build
131}
132
133install_libc_headers () {
134	pdir=debian/$1
135
136	$MAKE -f $srctree/Makefile headers_install INSTALL_HDR_PATH=$pdir/usr
137
138	# move asm headers to /usr/include/<libc-machine>/asm to match the structure
139	# used by Debian-based distros (to support multi-arch)
140	mkdir "$pdir/usr/include/${DEB_HOST_MULTIARCH}"
141	mv "$pdir/usr/include/asm" "$pdir/usr/include/${DEB_HOST_MULTIARCH}"
142}
143
144package=$1
145
146case "${package}" in
147*-dbg)
148	install_linux_image_dbg "${package}";;
149linux-image-*|user-mode-linux-*)
150	install_linux_image "${package}";;
151linux-libc-dev)
152	install_libc_headers "${package}";;
153linux-headers-*)
154	install_kernel_headers "${package}";;
155esac
156