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
27create_package() {
28	local pname="$1" pdir="$2"
29	local dpkg_deb_opts
30
31	mkdir -m 755 -p "$pdir/DEBIAN"
32	mkdir -p "$pdir/usr/share/doc/$pname"
33	cp debian/copyright "$pdir/usr/share/doc/$pname/"
34	cp debian/changelog "$pdir/usr/share/doc/$pname/changelog.Debian"
35	gzip -n -9 "$pdir/usr/share/doc/$pname/changelog.Debian"
36	sh -c "cd '$pdir'; find . -type f ! -path './DEBIAN/*' -printf '%P\0' \
37		| xargs -r0 md5sum > DEBIAN/md5sums"
38
39	# Fix ownership and permissions
40	if [ "$DEB_RULES_REQUIRES_ROOT" = "no" ]; then
41		dpkg_deb_opts="--root-owner-group"
42	else
43		chown -R root:root "$pdir"
44	fi
45	chmod -R go-w "$pdir"
46	# in case we are in a restrictive umask environment like 0077
47	chmod -R a+rX "$pdir"
48	# in case we build in a setuid/setgid directory
49	chmod -R ug-s "$pdir"
50
51	# Create the package
52	dpkg-gencontrol -p$pname -P"$pdir"
53	dpkg-deb $dpkg_deb_opts ${KDEB_COMPRESS:+-Z$KDEB_COMPRESS} --build "$pdir" ..
54}
55
56deploy_kernel_headers () {
57	pdir=$1
58
59	rm -rf $pdir
60
61	(
62		cd $srctree
63		find . arch/$SRCARCH -maxdepth 1 -name Makefile\*
64		find include scripts -type f -o -type l
65		find arch/$SRCARCH -name Kbuild.platforms -o -name Platform
66		find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f
67	) > debian/hdrsrcfiles
68
69	{
70		if is_enabled CONFIG_STACK_VALIDATION; then
71			echo tools/objtool/objtool
72		fi
73
74		find arch/$SRCARCH/include Module.symvers include scripts -type f
75
76		if is_enabled CONFIG_GCC_PLUGINS; then
77			find scripts/gcc-plugins -name \*.so
78		fi
79	} > debian/hdrobjfiles
80
81	destdir=$pdir/usr/src/linux-headers-$version
82	mkdir -p $destdir
83	tar -c -f - -C $srctree -T debian/hdrsrcfiles | tar -xf - -C $destdir
84	tar -c -f - -T debian/hdrobjfiles | tar -xf - -C $destdir
85	rm -f debian/hdrsrcfiles debian/hdrobjfiles
86
87	# copy .config manually to be where it's expected to be
88	cp $KCONFIG_CONFIG $destdir/.config
89
90	mkdir -p $pdir/lib/modules/$version/
91	ln -s /usr/src/linux-headers-$version $pdir/lib/modules/$version/build
92}
93
94deploy_libc_headers () {
95	pdir=$1
96
97	rm -rf $pdir
98
99	$MAKE -f $srctree/Makefile headers
100	$MAKE -f $srctree/Makefile headers_install INSTALL_HDR_PATH=$pdir/usr
101
102	# move asm headers to /usr/include/<libc-machine>/asm to match the structure
103	# used by Debian-based distros (to support multi-arch)
104	host_arch=$(dpkg-architecture -a$(cat debian/arch) -qDEB_HOST_MULTIARCH)
105	mkdir $pdir/usr/include/$host_arch
106	mv $pdir/usr/include/asm $pdir/usr/include/$host_arch/
107}
108
109version=$KERNELRELEASE
110tmpdir=debian/linux-image
111dbg_dir=debian/linux-image-dbg
112packagename=linux-image-$version
113dbg_packagename=$packagename-dbg
114
115if [ "$ARCH" = "um" ] ; then
116	packagename=user-mode-linux-$version
117fi
118
119# Not all arches have the same installed path in debian
120# XXX: have each arch Makefile export a variable of the canonical image install
121# path instead
122case $ARCH in
123um)
124	installed_image_path="usr/bin/linux-$version"
125	;;
126parisc|mips|powerpc)
127	installed_image_path="boot/vmlinux-$version"
128	;;
129*)
130	installed_image_path="boot/vmlinuz-$version"
131esac
132
133BUILD_DEBUG=$(if_enabled_echo CONFIG_DEBUG_INFO Yes)
134
135# Setup the directory structure
136rm -rf "$tmpdir" "$dbg_dir" debian/files
137mkdir -m 755 -p "$tmpdir/DEBIAN"
138mkdir -p "$tmpdir/lib" "$tmpdir/boot"
139
140# Install the kernel
141if [ "$ARCH" = "um" ] ; then
142	mkdir -p "$tmpdir/usr/lib/uml/modules/$version" "$tmpdir/usr/bin" "$tmpdir/usr/share/doc/$packagename"
143	cp System.map "$tmpdir/usr/lib/uml/modules/$version/System.map"
144	cp $KCONFIG_CONFIG "$tmpdir/usr/share/doc/$packagename/config"
145	gzip "$tmpdir/usr/share/doc/$packagename/config"
146else
147	cp System.map "$tmpdir/boot/System.map-$version"
148	cp $KCONFIG_CONFIG "$tmpdir/boot/config-$version"
149fi
150cp "$($MAKE -s -f $srctree/Makefile image_name)" "$tmpdir/$installed_image_path"
151
152if is_enabled CONFIG_OF_EARLY_FLATTREE; then
153	# Only some architectures with OF support have this target
154	if [ -d "${srctree}/arch/$SRCARCH/boot/dts" ]; then
155		$MAKE -f $srctree/Makefile INSTALL_DTBS_PATH="$tmpdir/usr/lib/$packagename" dtbs_install
156	fi
157fi
158
159if is_enabled CONFIG_MODULES; then
160	INSTALL_MOD_PATH="$tmpdir" $MAKE -f $srctree/Makefile modules_install
161	rm -f "$tmpdir/lib/modules/$version/build"
162	rm -f "$tmpdir/lib/modules/$version/source"
163	if [ "$ARCH" = "um" ] ; then
164		mv "$tmpdir/lib/modules/$version"/* "$tmpdir/usr/lib/uml/modules/$version/"
165		rmdir "$tmpdir/lib/modules/$version"
166	fi
167	if [ -n "$BUILD_DEBUG" ] ; then
168		for module in $(find $tmpdir/lib/modules/ -name *.ko -printf '%P\n'); do
169			module=lib/modules/$module
170			mkdir -p $(dirname $dbg_dir/usr/lib/debug/$module)
171			# only keep debug symbols in the debug file
172			$OBJCOPY --only-keep-debug $tmpdir/$module $dbg_dir/usr/lib/debug/$module
173			# strip original module from debug symbols
174			$OBJCOPY --strip-debug $tmpdir/$module
175			# then add a link to those
176			$OBJCOPY --add-gnu-debuglink=$dbg_dir/usr/lib/debug/$module $tmpdir/$module
177		done
178
179		# resign stripped modules
180		if is_enabled CONFIG_MODULE_SIG_ALL; then
181			INSTALL_MOD_PATH="$tmpdir" $MAKE -f $srctree/Makefile modules_sign
182		fi
183	fi
184fi
185
186# Install the maintainer scripts
187# Note: hook scripts under /etc/kernel are also executed by official Debian
188# kernel packages, as well as kernel packages built using make-kpkg.
189# make-kpkg sets $INITRD to indicate whether an initramfs is wanted, and
190# so do we; recent versions of dracut and initramfs-tools will obey this.
191debhookdir=${KDEB_HOOKDIR:-/etc/kernel}
192for script in postinst postrm preinst prerm ; do
193	mkdir -p "$tmpdir$debhookdir/$script.d"
194	cat <<EOF > "$tmpdir/DEBIAN/$script"
195#!/bin/sh
196
197set -e
198
199# Pass maintainer script parameters to hook scripts
200export DEB_MAINT_PARAMS="\$*"
201
202# Tell initramfs builder whether it's wanted
203export INITRD=$(if_enabled_echo CONFIG_BLK_DEV_INITRD Yes No)
204
205test -d $debhookdir/$script.d && run-parts --arg="$version" --arg="/$installed_image_path" $debhookdir/$script.d
206exit 0
207EOF
208	chmod 755 "$tmpdir/DEBIAN/$script"
209done
210
211if [ "$ARCH" != "um" ]; then
212	if is_enabled CONFIG_MODULES; then
213		deploy_kernel_headers debian/linux-headers
214		create_package linux-headers-$version debian/linux-headers
215	fi
216
217	deploy_libc_headers debian/linux-libc-dev
218	create_package linux-libc-dev debian/linux-libc-dev
219fi
220
221create_package "$packagename" "$tmpdir"
222
223if [ -n "$BUILD_DEBUG" ] ; then
224	# Build debug package
225	# Different tools want the image in different locations
226	# perf
227	mkdir -p $dbg_dir/usr/lib/debug/lib/modules/$version/
228	cp vmlinux $dbg_dir/usr/lib/debug/lib/modules/$version/
229	# systemtap
230	mkdir -p $dbg_dir/usr/lib/debug/boot/
231	ln -s ../lib/modules/$version/vmlinux $dbg_dir/usr/lib/debug/boot/vmlinux-$version
232	# kdump-tools
233	ln -s lib/modules/$version/vmlinux $dbg_dir/usr/lib/debug/vmlinux-$version
234	create_package "$dbg_packagename" "$dbg_dir"
235fi
236
237exit 0
238