From 65ba6fa439e7c3cbf97de9dce9e7a3390ae2638c Mon Sep 17 00:00:00 2001
From: Stephen Boyd <stephen.boyd@linaro.org>
Date: Thu, 16 Feb 2017 13:18:20 -0800
Subject: [PATCH] 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>
---
scripts/objdiff | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/scripts/objdiff b/scripts/objdiff
index 62e51dae2138d..4fb5d67968932 100755
--- a/scripts/objdiff
+++ b/scripts/objdiff
@@ -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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