Commit 65ba6fa4 authored Feb 16, 2017 by Stephen Boyd Committed by Masahiro Yamada Mar 11, 2017

scripts: objdiff: Ignore debug info when comparing



If the kernel is configured to be built with debug symbols, or
has bug tables, comparing files may not work if line numbers
change. This makes comparing object files with these options
harder to do. Let's strip out the debug info and drop the
__bug_table here so that we don't see false positives. There may
be other things to drop later, and it may be architecture
specific, but this works for me with my ARM64 build.

Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Reviewed-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

parent c1ae3cfa

scripts/objdiff

+4 −1

Original line number	Diff line number	Diff line
		@@ -57,13 +57,15 @@ get_output_dir() {
		do_objdump() {
		dir=$(get_output_dir $1)
		base=${1##*/}
		stripped=$dir/${base%.o}.stripped
		dis=$dir/${base%.o}.dis

		[ ! -d "$dir" ] && mkdir -p $dir

		# remove addresses for a cleaner diff
		# http://dummdida.tumblr.com/post/60924060451/binary-diff-between-libc-from-scientificlinux-and
		$OBJDUMP -D $1 \| sed "s/^[[:space:]]\+[0-9a-f]\+//" > $dis
		$STRIP -g $1 -R __bug_table -R .note -R .comment -o $stripped
		$OBJDUMP -D $stripped \| sed -e "s/^[[:space:]]\+[0-9a-f]\+//" -e "s:^$stripped:$1:" > $dis
		}

		dorecord() {
		@@ -73,6 +75,7 @@ dorecord() {

		CMT="`git rev-parse --short HEAD`"

		STRIP="${CROSS_COMPILE}strip"
		OBJDUMP="${CROSS_COMPILE}objdump"

		for d in $FILES; do

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