From: Anisse Astier <anisse@astier.eu>
To: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Michal Marek <mmarek@suse.cz>, maximilian attems <max@stro.at>,
Anisse Astier <anisse@astier.eu>
Subject: [PATCH 1/2] deb-pkg: split debug symbols in their own package
Date: Fri, 22 Mar 2013 11:06:00 +0100 [thread overview]
Message-ID: <1363946761-7449-1-git-send-email-anisse@astier.eu> (raw)
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>
---
scripts/package/builddeb | 33 ++++++++++++++++++++++++++++++++-
1 file changed, 32 insertions(+), 1 deletion(-)
diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index acb8650..7f7a7fd 100644
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -78,17 +78,19 @@ 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
# 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 "$fwdir/DEBIAN"
@@ -98,6 +100,8 @@ mkdir -p "$libc_headers_dir/usr/share/doc/$libc_headers_packagename"
mkdir -m 755 -p "$kernel_headers_dir/DEBIAN"
mkdir -p "$kernel_headers_dir/usr/share/doc/$kernel_headers_packagename"
mkdir -p "$kernel_headers_dir/lib/modules/$version/"
+mkdir -p "$dbg_dir/usr/share/doc/$dbg_packagename"
+mkdir -m 755 -p "$dbg_dir/DEBIAN"
if [ "$ARCH" = "um" ] ; then
mkdir -p "$tmpdir/usr/lib/uml/modules/$version" "$tmpdir/usr/bin"
fi
@@ -128,8 +132,24 @@ if grep -q '^CONFIG_MODULES=y' .config ; then
mv "$tmpdir/lib/modules/$version"/* "$tmpdir/usr/lib/uml/modules/$version/"
rmdir "$tmpdir/lib/modules/$version"
fi
+ # Build debug package
+ (
+ 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
+mkdir -p $dbg_dir/usr/lib/debug/lib/modules/$version/
+cp vmlinux $dbg_dir/usr/lib/debug/lib/modules/$version/
+
if [ "$ARCH" != "um" ]; then
$MAKE headers_check KBUILD_SRC=
$MAKE headers_install KBUILD_SRC= INSTALL_HDR_PATH="$libc_headers_dir/usr"
@@ -297,6 +317,17 @@ if [ "$ARCH" != "um" ]; then
create_package "$libc_headers_packagename" "$libc_headers_dir"
fi
+cat <<EOF >> debian/control
+
+Package: $dbg_packagename
+Section: devel
+Provides: linux-debug, linux-debug-$version
+Architecture: any
+Description: Linux kernel debugging symbols for $version
+ This package will come in handy if you need to debug the kernel.
+EOF
+
+create_package "$dbg_packagename" "$dbg_dir"
create_package "$packagename" "$tmpdir"
exit 0
--
1.8.1.4
next reply other threads:[~2013-03-22 10:14 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-22 10:06 Anisse Astier [this message]
2013-03-22 10:06 ` [PATCH 2/2] deb-pkg: add a hook argument to match debian hooks parameters Anisse Astier
2013-04-04 8:04 ` [PATCH 1/2] deb-pkg: split debug symbols in their own package Anisse Astier
2013-04-08 10:29 ` Michal Marek
2013-04-08 17:06 ` Anisse Astier
2013-04-08 17:06 ` Anisse Astier
2013-04-09 10:05 ` Anisse Astier
2013-04-19 8:05 ` Anisse Astier
2013-05-03 15:08 ` Anisse Astier
2013-05-03 15:19 ` Michal Marek
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