xref: /openbmc/linux/scripts/package/builddeb (revision ba61bb17) 
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
15create_package() {
16	local pname="$1" pdir="$2"
17
18	mkdir -m 755 -p "$pdir/DEBIAN"
19	mkdir -p "$pdir/usr/share/doc/$pname"
20	cp debian/copyright "$pdir/usr/share/doc/$pname/"
21	cp debian/changelog "$pdir/usr/share/doc/$pname/changelog.Debian"
22	gzip -9 "$pdir/usr/share/doc/$pname/changelog.Debian"
23	sh -c "cd '$pdir'; find . -type f ! -path './DEBIAN/*' -printf '%P\0' \
24		| xargs -r0 md5sum > DEBIAN/md5sums"
25
26	# Fix ownership and permissions
27	chown -R root:root "$pdir"
28	chmod -R go-w "$pdir"
29	# in case we are in a restrictive umask environment like 0077
30	chmod -R a+rX "$pdir"
31
32	# Create the package
33	dpkg-gencontrol -p$pname -P"$pdir"
34	dpkg --build "$pdir" ..
35}
36
37version=$KERNELRELEASE
38tmpdir="$objtree/debian/tmp"
39kernel_headers_dir="$objtree/debian/hdrtmp"
40libc_headers_dir="$objtree/debian/headertmp"
41dbg_dir="$objtree/debian/dbgtmp"
42packagename=linux-image-$version
43kernel_headers_packagename=linux-headers-$version
44libc_headers_packagename=linux-libc-dev
45dbg_packagename=$packagename-dbg
46
47if [ "$ARCH" = "um" ] ; then
48	packagename=user-mode-linux-$version
49fi
50
51# Not all arches have the same installed path in debian
52# XXX: have each arch Makefile export a variable of the canonical image install
53# path instead
54case $ARCH in
55um)
56	installed_image_path="usr/bin/linux-$version"
57	;;
58parisc|mips|powerpc)
59	installed_image_path="boot/vmlinux-$version"
60	;;
61*)
62	installed_image_path="boot/vmlinuz-$version"
63esac
64
65BUILD_DEBUG="$(grep -s '^CONFIG_DEBUG_INFO=y' $KCONFIG_CONFIG || true)"
66
67# Setup the directory structure
68rm -rf "$tmpdir" "$kernel_headers_dir" "$libc_headers_dir" "$dbg_dir" $objtree/debian/files
69mkdir -m 755 -p "$tmpdir/DEBIAN"
70mkdir -p "$tmpdir/lib" "$tmpdir/boot"
71mkdir -p "$kernel_headers_dir/lib/modules/$version/"
72
73# Build and install the kernel
74if [ "$ARCH" = "um" ] ; then
75	mkdir -p "$tmpdir/usr/lib/uml/modules/$version" "$tmpdir/usr/bin" "$tmpdir/usr/share/doc/$packagename"
76	$MAKE linux
77	cp System.map "$tmpdir/usr/lib/uml/modules/$version/System.map"
78	cp $KCONFIG_CONFIG "$tmpdir/usr/share/doc/$packagename/config"
79	gzip "$tmpdir/usr/share/doc/$packagename/config"
80else
81	cp System.map "$tmpdir/boot/System.map-$version"
82	cp $KCONFIG_CONFIG "$tmpdir/boot/config-$version"
83fi
84cp "$($MAKE -s image_name)" "$tmpdir/$installed_image_path"
85
86if grep -q "^CONFIG_OF=y" $KCONFIG_CONFIG ; then
87	# Only some architectures with OF support have this target
88	if grep -q dtbs_install "${srctree}/arch/$SRCARCH/Makefile"; then
89		$MAKE KBUILD_SRC= INSTALL_DTBS_PATH="$tmpdir/usr/lib/$packagename" dtbs_install
90	fi
91fi
92
93if grep -q '^CONFIG_MODULES=y' $KCONFIG_CONFIG ; then
94	INSTALL_MOD_PATH="$tmpdir" $MAKE KBUILD_SRC= modules_install
95	rm -f "$tmpdir/lib/modules/$version/build"
96	rm -f "$tmpdir/lib/modules/$version/source"
97	if [ "$ARCH" = "um" ] ; then
98		mv "$tmpdir/lib/modules/$version"/* "$tmpdir/usr/lib/uml/modules/$version/"
99		rmdir "$tmpdir/lib/modules/$version"
100	fi
101	if [ -n "$BUILD_DEBUG" ] ; then
102		for module in $(find $tmpdir/lib/modules/ -name *.ko -printf '%P\n'); do
103			module=lib/modules/$module
104			mkdir -p $(dirname $dbg_dir/usr/lib/debug/$module)
105			# only keep debug symbols in the debug file
106			$OBJCOPY --only-keep-debug $tmpdir/$module $dbg_dir/usr/lib/debug/$module
107			# strip original module from debug symbols
108			$OBJCOPY --strip-debug $tmpdir/$module
109			# then add a link to those
110			$OBJCOPY --add-gnu-debuglink=$dbg_dir/usr/lib/debug/$module $tmpdir/$module
111		done
112
113		# resign stripped modules
114		MODULE_SIG_ALL="$(grep -s '^CONFIG_MODULE_SIG_ALL=y' $KCONFIG_CONFIG || true)"
115		if [ -n "$MODULE_SIG_ALL" ]; then
116			INSTALL_MOD_PATH="$tmpdir" $MAKE KBUILD_SRC= modules_sign
117		fi
118	fi
119fi
120
121if [ "$ARCH" != "um" ]; then
122	$MAKE headers_check KBUILD_SRC=
123	$MAKE headers_install KBUILD_SRC= INSTALL_HDR_PATH="$libc_headers_dir/usr"
124fi
125
126# Install the maintainer scripts
127# Note: hook scripts under /etc/kernel are also executed by official Debian
128# kernel packages, as well as kernel packages built using make-kpkg.
129# make-kpkg sets $INITRD to indicate whether an initramfs is wanted, and
130# so do we; recent versions of dracut and initramfs-tools will obey this.
131debhookdir=${KDEB_HOOKDIR:-/etc/kernel}
132if grep -q '^CONFIG_BLK_DEV_INITRD=y' $KCONFIG_CONFIG; then
133	want_initrd=Yes
134else
135	want_initrd=No
136fi
137for script in postinst postrm preinst prerm ; do
138	mkdir -p "$tmpdir$debhookdir/$script.d"
139	cat <<EOF > "$tmpdir/DEBIAN/$script"
140#!/bin/sh
141
142set -e
143
144# Pass maintainer script parameters to hook scripts
145export DEB_MAINT_PARAMS="\$*"
146
147# Tell initramfs builder whether it's wanted
148export INITRD=$want_initrd
149
150test -d $debhookdir/$script.d && run-parts --arg="$version" --arg="/$installed_image_path" $debhookdir/$script.d
151exit 0
152EOF
153	chmod 755 "$tmpdir/DEBIAN/$script"
154done
155
156# Build kernel header package
157(cd $srctree; find . -name Makefile\* -o -name Kconfig\* -o -name \*.pl) > "$objtree/debian/hdrsrcfiles"
158(cd $srctree; find arch/*/include include scripts -type f -o -type l) >> "$objtree/debian/hdrsrcfiles"
159(cd $srctree; find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform) >> "$objtree/debian/hdrsrcfiles"
160(cd $srctree; find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f) >> "$objtree/debian/hdrsrcfiles"
161if grep -q '^CONFIG_STACK_VALIDATION=y' $KCONFIG_CONFIG ; then
162	(cd $objtree; find tools/objtool -type f -executable) >> "$objtree/debian/hdrobjfiles"
163fi
164(cd $objtree; find arch/$SRCARCH/include Module.symvers include scripts -type f) >> "$objtree/debian/hdrobjfiles"
165if grep -q '^CONFIG_GCC_PLUGINS=y' $KCONFIG_CONFIG ; then
166	(cd $objtree; find scripts/gcc-plugins -name \*.so -o -name gcc-common.h) >> "$objtree/debian/hdrobjfiles"
167fi
168destdir=$kernel_headers_dir/usr/src/linux-headers-$version
169mkdir -p "$destdir"
170(cd $srctree; tar -c -f - -T -) < "$objtree/debian/hdrsrcfiles" | (cd $destdir; tar -xf -)
171(cd $objtree; tar -c -f - -T -) < "$objtree/debian/hdrobjfiles" | (cd $destdir; tar -xf -)
172(cd $objtree; cp $KCONFIG_CONFIG $destdir/.config) # copy .config manually to be where it's expected to be
173ln -sf "/usr/src/linux-headers-$version" "$kernel_headers_dir/lib/modules/$version/build"
174rm -f "$objtree/debian/hdrsrcfiles" "$objtree/debian/hdrobjfiles"
175
176if [ "$ARCH" != "um" ]; then
177	create_package "$kernel_headers_packagename" "$kernel_headers_dir"
178	create_package "$libc_headers_packagename" "$libc_headers_dir"
179fi
180
181create_package "$packagename" "$tmpdir"
182
183if [ -n "$BUILD_DEBUG" ] ; then
184	# Build debug package
185	# Different tools want the image in different locations
186	# perf
187	mkdir -p $dbg_dir/usr/lib/debug/lib/modules/$version/
188	cp vmlinux $dbg_dir/usr/lib/debug/lib/modules/$version/
189	# systemtap
190	mkdir -p $dbg_dir/usr/lib/debug/boot/
191	ln -s ../lib/modules/$version/vmlinux $dbg_dir/usr/lib/debug/boot/vmlinux-$version
192	# kdump-tools
193	ln -s lib/modules/$version/vmlinux $dbg_dir/usr/lib/debug/vmlinux-$version
194	create_package "$dbg_packagename" "$dbg_dir"
195fi
196
197exit 0
198