65ba6fa439
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>
163 lines
2.8 KiB
Bash
Executable File
163 lines
2.8 KiB
Bash
Executable File
#!/bin/bash
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# objdiff - a small script for validating that a commit or series of commits
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# didn't change object code.
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#
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# Copyright 2014, Jason Cooper <jason@lakedaemon.net>
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#
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# Licensed under the terms of the GNU GPL version 2
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# usage example:
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#
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# $ git checkout COMMIT_A
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# $ <your fancy build command here>
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# $ ./scripts/objdiff record path/to/*.o
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#
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# $ git checkout COMMIT_B
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# $ <your fancy build command here>
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# $ ./scripts/objdiff record path/to/*.o
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#
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# $ ./scripts/objdiff diff COMMIT_A COMMIT_B
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# $
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# And to clean up (everything is in .tmp_objdiff/*)
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# $ ./scripts/objdiff clean all
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#
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# Note: 'make mrproper' will also remove .tmp_objdiff
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SRCTREE=$(cd $(git rev-parse --show-toplevel 2>/dev/null); pwd)
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if [ -z "$SRCTREE" ]; then
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echo >&2 "ERROR: Not a git repository."
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exit 1
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fi
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TMPD=$SRCTREE/.tmp_objdiff
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usage() {
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echo >&2 "Usage: $0 <command> <args>"
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echo >&2 " record <list of object files or directories>"
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echo >&2 " diff <commitA> <commitB>"
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echo >&2 " clean all | <commit>"
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exit 1
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}
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get_output_dir() {
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dir=${1%/*}
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if [ "$dir" = "$1" ]; then
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dir=.
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fi
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dir=$(cd $dir; pwd)
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echo $TMPD/$CMT${dir#$SRCTREE}
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}
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do_objdump() {
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dir=$(get_output_dir $1)
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base=${1##*/}
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stripped=$dir/${base%.o}.stripped
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dis=$dir/${base%.o}.dis
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[ ! -d "$dir" ] && mkdir -p $dir
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# remove addresses for a cleaner diff
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# http://dummdida.tumblr.com/post/60924060451/binary-diff-between-libc-from-scientificlinux-and
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$STRIP -g $1 -R __bug_table -R .note -R .comment -o $stripped
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$OBJDUMP -D $stripped | sed -e "s/^[[:space:]]\+[0-9a-f]\+//" -e "s:^$stripped:$1:" > $dis
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}
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dorecord() {
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[ $# -eq 0 ] && usage
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FILES="$*"
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CMT="`git rev-parse --short HEAD`"
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STRIP="${CROSS_COMPILE}strip"
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OBJDUMP="${CROSS_COMPILE}objdump"
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for d in $FILES; do
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if [ -d "$d" ]; then
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for f in $(find $d -name '*.o')
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do
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do_objdump $f
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done
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else
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do_objdump $d
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fi
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done
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}
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dodiff() {
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[ $# -ne 2 ] && [ $# -ne 0 ] && usage
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if [ $# -eq 0 ]; then
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SRC="`git rev-parse --short HEAD^`"
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DST="`git rev-parse --short HEAD`"
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else
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SRC="`git rev-parse --short $1`"
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DST="`git rev-parse --short $2`"
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fi
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DIFF="`which colordiff`"
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if [ ${#DIFF} -eq 0 ] || [ ! -x "$DIFF" ]; then
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DIFF="`which diff`"
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fi
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SRCD="$TMPD/$SRC"
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DSTD="$TMPD/$DST"
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if [ ! -d "$SRCD" ]; then
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echo >&2 "ERROR: $SRCD doesn't exist"
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exit 1
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fi
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if [ ! -d "$DSTD" ]; then
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echo >&2 "ERROR: $DSTD doesn't exist"
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exit 1
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fi
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$DIFF -Nurd $SRCD $DSTD
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}
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doclean() {
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[ $# -eq 0 ] && usage
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[ $# -gt 1 ] && usage
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if [ "x$1" = "xall" ]; then
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rm -rf $TMPD/*
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else
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CMT="`git rev-parse --short $1`"
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if [ -d "$TMPD/$CMT" ]; then
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rm -rf $TMPD/$CMT
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else
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echo >&2 "$CMT not found"
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fi
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fi
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}
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[ $# -eq 0 ] && usage
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case "$1" in
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record)
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shift
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dorecord $*
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;;
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diff)
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shift
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dodiff $*
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;;
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clean)
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shift
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doclean $*
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;;
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*)
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echo >&2 "Unrecognized command '$1'"
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exit 1
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;;
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esac
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