1 #!/bin/bash 1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0-only <<
3 2
4 # objdiff - a small script for validating that 3 # objdiff - a small script for validating that a commit or series of commits
5 # didn't change object code. 4 # didn't change object code.
6 # 5 #
7 # Copyright 2014, Jason Cooper <jason@lakedaemo 6 # Copyright 2014, Jason Cooper <jason@lakedaemon.net>
8 # 7 #
>> 8 # Licensed under the terms of the GNU GPL version 2
9 9
10 # usage example: 10 # usage example:
11 # 11 #
12 # $ git checkout COMMIT_A 12 # $ git checkout COMMIT_A
13 # $ <your fancy build command here> 13 # $ <your fancy build command here>
14 # $ ./scripts/objdiff record path/to/*.o 14 # $ ./scripts/objdiff record path/to/*.o
15 # 15 #
16 # $ git checkout COMMIT_B 16 # $ git checkout COMMIT_B
17 # $ <your fancy build command here> 17 # $ <your fancy build command here>
18 # $ ./scripts/objdiff record path/to/*.o 18 # $ ./scripts/objdiff record path/to/*.o
19 # 19 #
20 # $ ./scripts/objdiff diff COMMIT_A COMMIT_B 20 # $ ./scripts/objdiff diff COMMIT_A COMMIT_B
21 # $ 21 # $
22 22
23 # And to clean up (everything is in .objdiff/* !! 23 # And to clean up (everything is in .tmp_objdiff/*)
24 # $ ./scripts/objdiff clean all 24 # $ ./scripts/objdiff clean all
25 # 25 #
26 # Note: 'make mrproper' will also remove .objd !! 26 # Note: 'make mrproper' will also remove .tmp_objdiff
27 27
28 SRCTREE=$(cd $(git rev-parse --show-toplevel 2 28 SRCTREE=$(cd $(git rev-parse --show-toplevel 2>/dev/null); pwd)
29 29
30 if [ -z "$SRCTREE" ]; then 30 if [ -z "$SRCTREE" ]; then
31 echo >&2 "ERROR: Not a git repository. 31 echo >&2 "ERROR: Not a git repository."
32 exit 1 32 exit 1
33 fi 33 fi
34 34
35 TMPD=$SRCTREE/.objdiff !! 35 TMPD=$SRCTREE/.tmp_objdiff
36 36
37 usage() { 37 usage() {
38 echo >&2 "Usage: $0 <command> <args>" 38 echo >&2 "Usage: $0 <command> <args>"
39 echo >&2 " record <list of object 39 echo >&2 " record <list of object files or directories>"
40 echo >&2 " diff <commitA> <commi 40 echo >&2 " diff <commitA> <commitB>"
41 echo >&2 " clean all | <commit>" 41 echo >&2 " clean all | <commit>"
42 exit 1 42 exit 1
43 } 43 }
44 44
45 get_output_dir() { 45 get_output_dir() {
46 dir=${1%/*} 46 dir=${1%/*}
47 47
48 if [ "$dir" = "$1" ]; then 48 if [ "$dir" = "$1" ]; then
49 dir=. 49 dir=.
50 fi 50 fi
51 51
52 dir=$(cd $dir; pwd) 52 dir=$(cd $dir; pwd)
53 53
54 echo $TMPD/$CMT${dir#$SRCTREE} 54 echo $TMPD/$CMT${dir#$SRCTREE}
55 } 55 }
56 56
57 do_objdump() { 57 do_objdump() {
58 dir=$(get_output_dir $1) 58 dir=$(get_output_dir $1)
59 base=${1##*/} 59 base=${1##*/}
60 stripped=$dir/${base%.o}.stripped <<
61 dis=$dir/${base%.o}.dis 60 dis=$dir/${base%.o}.dis
62 61
63 [ ! -d "$dir" ] && mkdir -p $dir 62 [ ! -d "$dir" ] && mkdir -p $dir
64 63
65 # remove addresses for a cleaner diff 64 # remove addresses for a cleaner diff
66 # http://dummdida.tumblr.com/post/6092 65 # http://dummdida.tumblr.com/post/60924060451/binary-diff-between-libc-from-scientificlinux-and
67 $STRIP -g $1 -R __bug_table -R .note - !! 66 $OBJDUMP -D $1 | sed "s/^[[:space:]]\+[0-9a-f]\+//" > $dis
68 $OBJDUMP -D $stripped | sed -e "s/^[[: <<
69 } 67 }
70 68
71 dorecord() { 69 dorecord() {
72 [ $# -eq 0 ] && usage 70 [ $# -eq 0 ] && usage
73 71
74 FILES="$*" 72 FILES="$*"
75 73
76 CMT="`git rev-parse --short HEAD`" 74 CMT="`git rev-parse --short HEAD`"
77 75
78 STRIP="${CROSS_COMPILE}strip" <<
79 OBJDUMP="${CROSS_COMPILE}objdump" 76 OBJDUMP="${CROSS_COMPILE}objdump"
80 77
81 for d in $FILES; do 78 for d in $FILES; do
82 if [ -d "$d" ]; then 79 if [ -d "$d" ]; then
83 for f in $(find $d -na 80 for f in $(find $d -name '*.o')
84 do 81 do
85 do_objdump $f 82 do_objdump $f
86 done 83 done
87 else 84 else
88 do_objdump $d 85 do_objdump $d
89 fi 86 fi
90 done 87 done
91 } 88 }
92 89
93 dodiff() { 90 dodiff() {
94 [ $# -ne 2 ] && [ $# -ne 0 ] && usage 91 [ $# -ne 2 ] && [ $# -ne 0 ] && usage
95 92
96 if [ $# -eq 0 ]; then 93 if [ $# -eq 0 ]; then
97 SRC="`git rev-parse --short HE 94 SRC="`git rev-parse --short HEAD^`"
98 DST="`git rev-parse --short HE 95 DST="`git rev-parse --short HEAD`"
99 else 96 else
100 SRC="`git rev-parse --short $1 97 SRC="`git rev-parse --short $1`"
101 DST="`git rev-parse --short $2 98 DST="`git rev-parse --short $2`"
102 fi 99 fi
103 100
104 DIFF="`which colordiff`" 101 DIFF="`which colordiff`"
105 102
106 if [ ${#DIFF} -eq 0 ] || [ ! -x "$DIFF 103 if [ ${#DIFF} -eq 0 ] || [ ! -x "$DIFF" ]; then
107 DIFF="`which diff`" 104 DIFF="`which diff`"
108 fi 105 fi
109 106
110 SRCD="$TMPD/$SRC" 107 SRCD="$TMPD/$SRC"
111 DSTD="$TMPD/$DST" 108 DSTD="$TMPD/$DST"
112 109
113 if [ ! -d "$SRCD" ]; then 110 if [ ! -d "$SRCD" ]; then
114 echo >&2 "ERROR: $SRCD doesn't 111 echo >&2 "ERROR: $SRCD doesn't exist"
115 exit 1 112 exit 1
116 fi 113 fi
117 114
118 if [ ! -d "$DSTD" ]; then 115 if [ ! -d "$DSTD" ]; then
119 echo >&2 "ERROR: $DSTD doesn't 116 echo >&2 "ERROR: $DSTD doesn't exist"
120 exit 1 117 exit 1
121 fi 118 fi
122 119
123 $DIFF -Nurd $SRCD $DSTD 120 $DIFF -Nurd $SRCD $DSTD
124 } 121 }
125 122
126 doclean() { 123 doclean() {
127 [ $# -eq 0 ] && usage 124 [ $# -eq 0 ] && usage
128 [ $# -gt 1 ] && usage 125 [ $# -gt 1 ] && usage
129 126
130 if [ "x$1" = "xall" ]; then 127 if [ "x$1" = "xall" ]; then
131 rm -rf $TMPD/* 128 rm -rf $TMPD/*
132 else 129 else
133 CMT="`git rev-parse --short $1 130 CMT="`git rev-parse --short $1`"
134 131
135 if [ -d "$TMPD/$CMT" ]; then 132 if [ -d "$TMPD/$CMT" ]; then
136 rm -rf $TMPD/$CMT 133 rm -rf $TMPD/$CMT
137 else 134 else
138 echo >&2 "$CMT not fou 135 echo >&2 "$CMT not found"
139 fi 136 fi
140 fi 137 fi
141 } 138 }
142 139
143 [ $# -eq 0 ] && usage 140 [ $# -eq 0 ] && usage
144 141
145 case "$1" in 142 case "$1" in
146 record) 143 record)
147 shift 144 shift
148 dorecord $* 145 dorecord $*
149 ;; 146 ;;
150 diff) 147 diff)
151 shift 148 shift
152 dodiff $* 149 dodiff $*
153 ;; 150 ;;
154 clean) 151 clean)
155 shift 152 shift
156 doclean $* 153 doclean $*
157 ;; 154 ;;
158 *) 155 *)
159 echo >&2 "Unrecognized command 156 echo >&2 "Unrecognized command '$1'"
160 exit 1 157 exit 1
161 ;; 158 ;;
162 esac 159 esac
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.