3 # objdiff - a small script for validating that a commit or series of commits
4 # didn't change object code.
6 # Copyright 2014, Jason Cooper <jason@lakedaemon.net>
8 # Licensed under the terms of the GNU GPL version 2
12 # $ git checkout COMMIT_A
13 # $ <your fancy build command here>
14 # $ ./scripts/objdiff record path/to/*.o
16 # $ git checkout COMMIT_B
17 # $ <your fancy build command here>
18 # $ ./scripts/objdiff record path/to/*.o
20 # $ ./scripts/objdiff diff COMMIT_A COMMIT_B
23 # And to clean up (everything is in .tmp_objdiff/*)
24 # $ ./scripts/objdiff clean all
26 # Note: 'make mrproper' will also remove .tmp_objdiff
28 SRCTREE
=$
(cd $
(git rev-parse
--show-toplevel 2>/dev
/null
); pwd)
30 if [ -z "$SRCTREE" ]; then
31 echo >&2 "ERROR: Not a git repository."
35 TMPD
=$SRCTREE/.tmp_objdiff
38 echo >&2 "Usage: $0 <command> <args>"
39 echo >&2 " record <list of object files or directories>"
40 echo >&2 " diff <commitA> <commitB>"
41 echo >&2 " clean all | <commit>"
48 if [ "$dir" = "$1" ]; then
54 echo $TMPD/$CMT${dir#$SRCTREE}
58 dir
=$
(get_output_dir
$1)
60 dis
=$dir/${base%.o}.dis
62 [ ! -d "$dir" ] && mkdir
-p $dir
64 # remove addresses for a cleaner diff
65 # http://dummdida.tumblr.com/post/60924060451/binary-diff-between-libc-from-scientificlinux-and
66 $OBJDUMP -D $1 |
sed "s/^[[:space:]]\+[0-9a-f]\+//" > $dis
74 CMT
="`git rev-parse --short HEAD`"
76 OBJDUMP
="${CROSS_COMPILE}objdump"
80 for f
in $
(find $d -name '*.o')
91 [ $# -ne 2 ] && [ $# -ne 0 ] && usage
94 SRC
="`git rev-parse --short HEAD^`"
95 DST
="`git rev-parse --short HEAD`"
97 SRC
="`git rev-parse --short $1`"
98 DST
="`git rev-parse --short $2`"
101 DIFF
="`which colordiff`"
103 if [ ${#DIFF} -eq 0 ] ||
[ ! -x "$DIFF" ]; then
110 if [ ! -d "$SRCD" ]; then
111 echo >&2 "ERROR: $SRCD doesn't exist"
115 if [ ! -d "$DSTD" ]; then
116 echo >&2 "ERROR: $DSTD doesn't exist"
120 $DIFF -Nurd $SRCD $DSTD
124 [ $# -eq 0 ] && usage
125 [ $# -gt 1 ] && usage
127 if [ "x$1" = "xall" ]; then
130 CMT
="`git rev-parse --short $1`"
132 if [ -d "$TMPD/$CMT" ]; then
135 echo >&2 "$CMT not found"
140 [ $# -eq 0 ] && usage
156 echo >&2 "Unrecognized command '$1'"
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