142 lines
3.6 KiB
Bash
142 lines
3.6 KiB
Bash
#!/bin/sh
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright (c) 2000, Bruce Evans <bde@freebsd.org>
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# Copyright (c) 2018, Jeff Roberson <jeff@freebsd.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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usage()
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{
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echo "usage: genoffset [-o outfile] objfile"
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exit 1
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}
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work()
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{
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echo "#ifndef _OFFSET_INC_"
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echo "#define _OFFSET_INC_"
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echo "#if !defined(GENOFFSET) && (!defined(KLD_MODULE) || defined(KLD_TIED))"
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${NM:='nm'} ${NMFLAGS} "$1" | ${AWK:='awk'} '
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/ C .*_datatype_*/ {
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type = substr($3, match($3, "_datatype_") + length("_datatype_"))
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}
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/ C .*_parenttype_*/ {
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parent = substr($3, match($3, "_parenttype_") + length("_parenttype_"))
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}
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/ C .*sign$/ {
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sign = substr($1, length($1) - 3, 4)
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sub("^0*", "", sign)
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if (sign != "")
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sign = "-"
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}
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/ C .*w0$/ {
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w0 = substr($1, length($1) - 3, 4)
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}
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/ C .*w1$/ {
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w1 = substr($1, length($1) - 3, 4)
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}
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/ C .*w2$/ {
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w2 = substr($1, length($1) - 3, 4)
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}
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/ C .*w3$/ {
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w3 = substr($1, length($1) - 3, 4)
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w = w3 w2 w1 w0
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sub("^0*", "", w)
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if (w == "")
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w = "0"
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hex = ""
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if (w != "0")
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hex = "0x"
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sub("w3$", "", $3)
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member = tolower($3)
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# This still has minor problems representing INT_MIN, etc.
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# E.g.,
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# with 32-bit 2''s complement ints, this prints -0x80000000,
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# which has the wrong type (unsigned int).
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offset = sprintf("%s%s%s", sign, hex, w)
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structures[parent] = sprintf("%s%s %s %s\n",
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structures[parent], offset, type, member)
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}
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END {
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for (struct in structures) {
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printf("struct %s_lite {\n", struct);
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n = split(structures[struct], members, "\n")
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for (i = 1; i < n; i++) {
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for (j = i + 1; j < n; j++) {
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split(members[i], ivar, " ")
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split(members[j], jvar, " ")
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if (jvar[1] < ivar[1]) {
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tmp = members[i]
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members[i] = members[j]
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members[j] = tmp
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}
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}
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}
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off = "0"
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for (i = 1; i < n; i++) {
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split(members[i], m, " ")
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printf "\tu_char\tpad_%s[%s - %s];\n", m[3], m[1], off
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printf "\t%s\t%s;\n", m[2], m[3]
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off = sprintf("(%s + sizeof(%s))", m[1], m[2])
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}
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printf("};\n");
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}
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}
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'
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echo "#endif"
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echo "#endif"
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}
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#
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#MAIN PROGGRAM
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#
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use_outfile="no"
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while getopts "o:" option
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do
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case "$option" in
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o) outfile="$OPTARG"
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use_outfile="yes";;
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*) usage;;
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esac
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done
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shift $(($OPTIND - 1))
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case $# in
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1) ;;
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*) usage;;
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esac
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if [ "$use_outfile" = "yes" ]
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then
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work $1 3>"$outfile" >&3 3>&-
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else
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work $1
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fi
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