| Message ID | 20170216211820.4337-1-stephen.boyd@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Stephen, On Thu, Feb 16, 2017 at 01:18:20PM -0800, Stephen Boyd wrote: > 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. > > Cc: Masahiro Yamada <yamada.m@jp.panasonic.com> > Cc: Jason Cooper <jason@lakedaemon.net> > Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org> Reviewed-by: Jason Cooper <jason@lakedaemon.net> I'm glad it's useful! thx, Jason. -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi. 2017-02-17 6:18 GMT+09:00 Stephen Boyd <stephen.boyd@linaro.org>: > 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. > > Cc: Masahiro Yamada <yamada.m@jp.panasonic.com> > Cc: Jason Cooper <jason@lakedaemon.net> > Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org> Great! Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com> BTW, I left Panasonic two years ago, so the old address yamada.m@jp.panasonic.com is not working any more. Please drop the "Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>" when this patch is applied. Thanks!
2017-02-17 6:18 GMT+09:00 Stephen Boyd <stephen.boyd@linaro.org>: > 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. > > Cc: Masahiro Yamada <yamada.m@jp.panasonic.com> > Cc: Jason Cooper <jason@lakedaemon.net> > Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org> Applied to linux-kbuild/misc with Jason's Reviewed-by. Thanks! Best Regards Masahiro Yamada -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/scripts/objdiff b/scripts/objdiff index 62e51dae2138..4fb5d6796893 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
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. Cc: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Jason Cooper <jason@lakedaemon.net> Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org> --- scripts/objdiff | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)