#!/bin/bash# SPDX-License-Identifier: GPL-2.0-only # objdiff - a small script for validating that a commit or series of commits# didn't change object code.## Copyright 2014, Jason Cooper <jason@lakedaemon.net># # usage example:## $ git checkout COMMIT_A# $ <your fancy build command here># $ ./scripts/objdiff record path/to/*.o## $ git checkout COMMIT_B# $ <your fancy build command here># $ ./scripts/objdiff record path/to/*.o## $ ./scripts/objdiff diff COMMIT_A COMMIT_B# $ # And to clean up (everything is in .objdiff/*)# $ ./scripts/objdiff clean all## Note: 'make mrproper' will also remove .objdiff SRCTREE=$(cd $(git rev-parse --show-toplevel 2>/dev/null); pwd) if [ -z "$SRCTREE" ]; then echo >&2 "ERROR: Not a git repository." exit 1fi TMPD=$SRCTREE/.objdiff usage() { echo >&2 "Usage: $0 <command> <args>" echo >&2 " record <list of object files or directories>" echo >&2 " diff <commitA> <commitB>" echo >&2 " clean all | <commit>" exit 1} get_output_dir() { dir=${1%/*} if [ "$dir" = "$1" ]; then dir=. fi dir=$(cd $dir; pwd) echo $TMPD/$CMT${dir#$SRCTREE}} 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 $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() { [ $# -eq 0 ] && usage FILES="$*" CMT="`git rev-parse --short HEAD`" STRIP="${CROSS_COMPILE}strip" OBJDUMP="${CROSS_COMPILE}objdump" for d in $FILES; do if [ -d "$d" ]; then for f in $(find $d -name '*.o') do do_objdump $f done else do_objdump $d fi done} dodiff() { [ $# -ne 2 ] && [ $# -ne 0 ] && usage if [ $# -eq 0 ]; then SRC="`git rev-parse --short HEAD^`" DST="`git rev-parse --short HEAD`" else SRC="`git rev-parse --short $1`" DST="`git rev-parse --short $2`" fi DIFF="`which colordiff`" if [ ${#DIFF} -eq 0 ] || [ ! -x "$DIFF" ]; then DIFF="`which diff`" fi SRCD="$TMPD/$SRC" DSTD="$TMPD/$DST" if [ ! -d "$SRCD" ]; then echo >&2 "ERROR: $SRCD doesn't exist" exit 1 fi if [ ! -d "$DSTD" ]; then echo >&2 "ERROR: $DSTD doesn't exist" exit 1 fi $DIFF -Nurd $SRCD $DSTD} doclean() { [ $# -eq 0 ] && usage [ $# -gt 1 ] && usage if [ "x$1" = "xall" ]; then rm -rf $TMPD/* else CMT="`git rev-parse --short $1`" if [ -d "$TMPD/$CMT" ]; then rm -rf $TMPD/$CMT else echo >&2 "$CMT not found" fi fi} [ $# -eq 0 ] && usage case "$1" in record) shift dorecord $* ;; diff) shift dodiff $* ;; clean) shift doclean $* ;; *) echo >&2 "Unrecognized command '$1'" exit 1 ;;esac
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-only
# objdiff - a small script for validating that a commit or series of commits
# didn't change object code.
#
# Copyright 2014, Jason Cooper <jason@lakedaemon.net>
#
# usage example:
#
# $ git checkout COMMIT_A
# $ <your fancy build command here>
# $ ./scripts/objdiff record path/to/*.o
#
# $ git checkout COMMIT_B
# $ <your fancy build command here>
# $ ./scripts/objdiff record path/to/*.o
#
# $ ./scripts/objdiff diff COMMIT_A COMMIT_B
# $
# And to clean up (everything is in .objdiff/*)
# $ ./scripts/objdiff clean all
#
# Note: 'make mrproper' will also remove .objdiff
SRCTREE=$(cd $(git rev-parse --show-toplevel 2>/dev/null); pwd)
if [ -z "$SRCTREE" ]; then
echo >&2 "ERROR: Not a git repository."
exit 1
fi
TMPD=$SRCTREE/.objdiff
usage() {
echo >&2 "Usage: $0 <command> <args>"
echo >&2 " record <list of object files or directories>"
echo >&2 " diff <commitA> <commitB>"
echo >&2 " clean all | <commit>"
exit 1
}
get_output_dir() {
dir=${1%/*}
if [ "$dir" = "$1" ]; then
dir=.
fi
dir=$(cd $dir; pwd)
echo $TMPD/$CMT${dir#$SRCTREE}
}
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
$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() {
[ $# -eq 0 ] && usage
FILES="$*"
CMT="`git rev-parse --short HEAD`"
STRIP="${CROSS_COMPILE}strip"
OBJDUMP="${CROSS_COMPILE}objdump"
for d in $FILES; do
if [ -d "$d" ]; then
for f in $(find $d -name '*.o')
do
do_objdump $f
done
else
do_objdump $d
fi
done
}
dodiff() {
[ $# -ne 2 ] && [ $# -ne 0 ] && usage
if [ $# -eq 0 ]; then
SRC="`git rev-parse --short HEAD^`"
DST="`git rev-parse --short HEAD`"
else
SRC="`git rev-parse --short $1`"
DST="`git rev-parse --short $2`"
fi
DIFF="`which colordiff`"
if [ ${#DIFF} -eq 0 ] || [ ! -x "$DIFF" ]; then
DIFF="`which diff`"
fi
SRCD="$TMPD/$SRC"
DSTD="$TMPD/$DST"
if [ ! -d "$SRCD" ]; then
echo >&2 "ERROR: $SRCD doesn't exist"
exit 1
fi
if [ ! -d "$DSTD" ]; then
echo >&2 "ERROR: $DSTD doesn't exist"
exit 1
fi
$DIFF -Nurd $SRCD $DSTD
}
doclean() {
[ $# -eq 0 ] && usage
[ $# -gt 1 ] && usage
if [ "x$1" = "xall" ]; then
rm -rf $TMPD/*
else
CMT="`git rev-parse --short $1`"
if [ -d "$TMPD/$CMT" ]; then
rm -rf $TMPD/$CMT
else
echo >&2 "$CMT not found"
fi
fi
}
[ $# -eq 0 ] && usage
case "$1" in
record)
shift
dorecord $*
;;
diff)
shift
dodiff $*
;;
clean)
shift
doclean $*
;;
*)
echo >&2 "Unrecognized command '$1'"
exit 1
;;
esac