tasklet: Remove tasklet_kill_immediate
[linux-2.6-microblaze.git] / scripts / objdiff
1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0-only
3
4 # objdiff - a small script for validating that a commit or series of commits
5 # didn't change object code.
6 #
7 # Copyright 2014, Jason Cooper <jason@lakedaemon.net>
8 #
9
10 # usage example:
11 #
12 # $ git checkout COMMIT_A
13 # $ <your fancy build command here>
14 # $ ./scripts/objdiff record path/to/*.o
15 #
16 # $ git checkout COMMIT_B
17 # $ <your fancy build command here>
18 # $ ./scripts/objdiff record path/to/*.o
19 #
20 # $ ./scripts/objdiff diff COMMIT_A COMMIT_B
21 # $
22
23 # And to clean up (everything is in .tmp_objdiff/*)
24 # $ ./scripts/objdiff clean all
25 #
26 # Note: 'make mrproper' will also remove .tmp_objdiff
27
28 SRCTREE=$(cd $(git rev-parse --show-toplevel 2>/dev/null); pwd)
29
30 if [ -z "$SRCTREE" ]; then
31         echo >&2 "ERROR: Not a git repository."
32         exit 1
33 fi
34
35 TMPD=$SRCTREE/.tmp_objdiff
36
37 usage() {
38         echo >&2 "Usage: $0 <command> <args>"
39         echo >&2 "  record    <list of object files or directories>"
40         echo >&2 "  diff      <commitA> <commitB>"
41         echo >&2 "  clean     all | <commit>"
42         exit 1
43 }
44
45 get_output_dir() {
46         dir=${1%/*}
47
48         if [ "$dir" = "$1" ]; then
49                 dir=.
50         fi
51
52         dir=$(cd $dir; pwd)
53
54         echo $TMPD/$CMT${dir#$SRCTREE}
55 }
56
57 do_objdump() {
58         dir=$(get_output_dir $1)
59         base=${1##*/}
60         stripped=$dir/${base%.o}.stripped
61         dis=$dir/${base%.o}.dis
62
63         [ ! -d "$dir" ] && mkdir -p $dir
64
65         # remove addresses for a cleaner diff
66         # http://dummdida.tumblr.com/post/60924060451/binary-diff-between-libc-from-scientificlinux-and
67         $STRIP -g $1 -R __bug_table -R .note -R .comment -o $stripped
68         $OBJDUMP -D $stripped | sed -e "s/^[[:space:]]\+[0-9a-f]\+//" -e "s:^$stripped:$1:" > $dis
69 }
70
71 dorecord() {
72         [ $# -eq 0 ] && usage
73
74         FILES="$*"
75
76         CMT="`git rev-parse --short HEAD`"
77
78         STRIP="${CROSS_COMPILE}strip"
79         OBJDUMP="${CROSS_COMPILE}objdump"
80
81         for d in $FILES; do
82                 if [ -d "$d" ]; then
83                         for f in $(find $d -name '*.o')
84                         do
85                                 do_objdump $f
86                         done
87                 else
88                         do_objdump $d
89                 fi
90         done
91 }
92
93 dodiff() {
94         [ $# -ne 2 ] && [ $# -ne 0 ] && usage
95
96         if [ $# -eq 0 ]; then
97                 SRC="`git rev-parse --short HEAD^`"
98                 DST="`git rev-parse --short HEAD`"
99         else
100                 SRC="`git rev-parse --short $1`"
101                 DST="`git rev-parse --short $2`"
102         fi
103
104         DIFF="`which colordiff`"
105
106         if [ ${#DIFF} -eq 0 ] || [ ! -x "$DIFF" ]; then
107                 DIFF="`which diff`"
108         fi
109
110         SRCD="$TMPD/$SRC"
111         DSTD="$TMPD/$DST"
112
113         if [ ! -d "$SRCD" ]; then
114                 echo >&2 "ERROR: $SRCD doesn't exist"
115                 exit 1
116         fi
117
118         if [ ! -d "$DSTD" ]; then
119                 echo >&2 "ERROR: $DSTD doesn't exist"
120                 exit 1
121         fi
122
123         $DIFF -Nurd $SRCD $DSTD
124 }
125
126 doclean() {
127         [ $# -eq 0 ] && usage
128         [ $# -gt 1 ] && usage
129
130         if [ "x$1" = "xall" ]; then
131                 rm -rf $TMPD/*
132         else
133                 CMT="`git rev-parse --short $1`"
134
135                 if [ -d "$TMPD/$CMT" ]; then
136                         rm -rf $TMPD/$CMT
137                 else
138                         echo >&2 "$CMT not found"
139                 fi
140         fi
141 }
142
143 [ $# -eq 0 ] && usage
144
145 case "$1" in
146         record)
147                 shift
148                 dorecord $*
149                 ;;
150         diff)
151                 shift
152                 dodiff $*
153                 ;;
154         clean)
155                 shift
156                 doclean $*
157                 ;;
158         *)
159                 echo >&2 "Unrecognized command '$1'"
160                 exit 1
161                 ;;
162 esac