ctfstrip revision 1.8 
1#!/bin/sh
2#
3# $OpenBSD: ctfstrip,v 1.8 2017/08/15 15:48:10 jasper Exp $
4#
5# Copyright (c) 2017 Martin Pieuchot
6#
7# Permission to use, copy, modify, and distribute this software for any
8# purpose with or without fee is hereby granted, provided that the above
9# copyright notice and this permission notice appear in all copies.
10#
11# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18
19set -o posix
20
21cleanup() {
22	rm -f ${TMPFILE}
23	exit 1
24}
25
26trap "cleanup" 1 2 3 13 15
27
28USAGE="usage: ${0##*/} [-S] [-o outfile] file"
29
30for arg in "$@"; do
31	if [ -n "$OSET" ]; then
32		OUTFILE="$arg"
33		unset OSET
34		shift
35		continue
36	fi
37	case "$arg" in
38	-o)	OSET=1; shift; continue;;
39	-S)	STRIPFLAG=-g; shift; continue;;
40	esac
41	shift
42	set -- "$@" "$arg"
43	INFILE="$arg"
44done
45
46if [ $# -eq 0 ]; then
47	echo "${USAGE}" >&2
48	exit 1
49fi
50
51LABEL="unknown"
52TMPFILE=$(mktemp /tmp/.ctf.XXXXXXXXXX)
53
54# Extract kernel version
55if [ -z "${INFILE##bsd*}" ]; then
56	LABEL=`what "$INFILE" | sed -n '$s/^   //p'`
57fi
58
59# If ctfstrip was passed a file that lacks useful debug sections, ctfconv will fail.
60# So try to run ctfconv and silently fallback to plain strip(1) if that failed.
61ctfconv -o ${TMPFILE} -l "${LABEL}" "${INFILE}" 2> /dev/null
62
63if [ $? -eq 0 ]; then
64        objcopy --add-section .SUNW_ctf=${TMPFILE} ${STRIPFLAG} "${INFILE}" "${OUTFILE}"
65else
66        strip ${STRIPFLAG} -o "${OUTFILE}" "$@"
67fi
68
69rm -f ${TMPFILE}
70