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authorAnisse Astier <anisse@astier.eu>2013-07-03 16:02:04 +0200
committerMichal Marek <mmarek@suse.cz>2013-07-24 15:50:23 +0200
commit810e843746b7297819b0a76b6c105b9bda01fd9c (patch)
treeded4b8f7000d34d32ab2672750d85718efac878d /scripts
parentd20917670ee1fd4b090555e551faea04b014ca97 (diff)
downloadlinux-linaro-stable-810e843746b7297819b0a76b6c105b9bda01fd9c.tar.gz
deb-pkg: split debug symbols in their own package
This can reduce almost 3 times the size of the linux-image package, while keeping the debug symbols available for this particular build, in their own package. This mimics the way kernels are built in debian, ubuntu, or with make-kpkg, and comes at the price of a small slowdown in the building of packages. Signed-off-by: Anisse Astier <anisse@astier.eu> Cc: Ben Hutchings <ben@decadent.org.uk> Acked-by: maximilian attems <max@stro.at> Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/package/builddeb50
1 files changed, 49 insertions, 1 deletions
diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index a8662ef3ccee..541a1cfa9a6b 100644
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -78,17 +78,21 @@ tmpdir="$objtree/debian/tmp"
fwdir="$objtree/debian/fwtmp"
kernel_headers_dir="$objtree/debian/hdrtmp"
libc_headers_dir="$objtree/debian/headertmp"
+dbg_dir="$objtree/debian/dbgtmp"
packagename=linux-image-$version
fwpackagename=linux-firmware-image
kernel_headers_packagename=linux-headers-$version
libc_headers_packagename=linux-libc-dev
+dbg_packagename=$packagename-dbg
if [ "$ARCH" = "um" ] ; then
packagename=user-mode-linux-$version
fi
+BUILD_DEBUG="$(grep -s '^CONFIG_DEBUG_INFO=y' $KCONFIG_CONFIG || true)"
+
# Setup the directory structure
-rm -rf "$tmpdir" "$fwdir" "$kernel_headers_dir" "$libc_headers_dir"
+rm -rf "$tmpdir" "$fwdir" "$kernel_headers_dir" "$libc_headers_dir" "$dbg_dir"
mkdir -m 755 -p "$tmpdir/DEBIAN"
mkdir -p "$tmpdir/lib" "$tmpdir/boot" "$tmpdir/usr/share/doc/$packagename"
mkdir -m 755 -p "$fwdir/DEBIAN"
@@ -101,6 +105,10 @@ mkdir -p "$kernel_headers_dir/lib/modules/$version/"
if [ "$ARCH" = "um" ] ; then
mkdir -p "$tmpdir/usr/lib/uml/modules/$version" "$tmpdir/usr/bin"
fi
+if [ -n "$BUILD_DEBUG" ] ; then
+ mkdir -p "$dbg_dir/usr/share/doc/$dbg_packagename"
+ mkdir -m 755 -p "$dbg_dir/DEBIAN"
+fi
# Build and install the kernel
if [ "$ARCH" = "um" ] ; then
@@ -128,6 +136,20 @@ if grep -q '^CONFIG_MODULES=y' $KCONFIG_CONFIG ; then
mv "$tmpdir/lib/modules/$version"/* "$tmpdir/usr/lib/uml/modules/$version/"
rmdir "$tmpdir/lib/modules/$version"
fi
+ if [ -n "$BUILD_DEBUG" ] ; then
+ (
+ cd $tmpdir
+ for module in $(find lib/modules/ -name *.ko); do
+ mkdir -p $(dirname $dbg_dir/usr/lib/debug/$module)
+ # only keep debug symbols in the debug file
+ objcopy --only-keep-debug $module $dbg_dir/usr/lib/debug/$module
+ # strip original module from debug symbols
+ objcopy --strip-debug $module
+ # then add a link to those
+ objcopy --add-gnu-debuglink=$dbg_dir/usr/lib/debug/$module $module
+ done
+ )
+ fi
fi
if [ "$ARCH" != "um" ]; then
@@ -300,4 +322,30 @@ fi
create_package "$packagename" "$tmpdir"
+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
+
+ cat <<EOF >> debian/control
+
+Package: $dbg_packagename
+Section: debug
+Provides: linux-debug, linux-debug-$version
+Architecture: any
+Description: Linux kernel debugging symbols for $version
+ This package will come in handy if you need to debug the kernel. It provides
+ all the necessary debug symbols for the kernel and its modules.
+EOF
+
+ create_package "$dbg_packagename" "$dbg_dir"
+fi
+
exit 0