1#!/bin/sh 2 3# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 4# 5# Copyright (c) 2000, Bruce Evans <bde@freebsd.org> 6# Copyright (c) 2018, Jeff Roberson <jeff@freebsd.org> 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29# $FreeBSD$ 30 31usage() 32{ 33 echo "usage: genoffset [-o outfile] objfile" 34 exit 1 35} 36 37 38work() 39{ 40 echo "#ifndef _OFFSET_INC_" 41 echo "#define _OFFSET_INC_" 42 echo "#if !defined(GENOFFSET) && (!defined(KLD_MODULE) || defined(KLD_TIED))" 43 ${NM:='nm'} ${NMFLAGS} "$1" | ${AWK:='awk'} ' 44 / C .*_datatype_*/ { 45 type = substr($3, match($3, "_datatype_") + length("_datatype_")) 46 } 47 / C .*_parenttype_*/ { 48 parent = substr($3, match($3, "_parenttype_") + length("_parenttype_")) 49 } 50 / C .*sign$/ { 51 sign = substr($1, length($1) - 3, 4) 52 sub("^0*", "", sign) 53 if (sign != "") 54 sign = "-" 55 } 56 / C .*w0$/ { 57 w0 = substr($1, length($1) - 3, 4) 58 } 59 / C .*w1$/ { 60 w1 = substr($1, length($1) - 3, 4) 61 } 62 / C .*w2$/ { 63 w2 = substr($1, length($1) - 3, 4) 64 } 65 / C .*w3$/ { 66 w3 = substr($1, length($1) - 3, 4) 67 w = w3 w2 w1 w0 68 sub("^0*", "", w) 69 if (w == "") 70 w = "0" 71 hex = "" 72 if (w != "0") 73 hex = "0x" 74 sub("w3$", "", $3) 75 member = tolower($3) 76 # This still has minor problems representing INT_MIN, etc. 77 # E.g., 78 # with 32-bit 2''s complement ints, this prints -0x80000000, 79 # which has the wrong type (unsigned int). 80 offset = sprintf("%s%s%s", sign, hex, w) 81 82 structures[parent] = sprintf("%s%s %s %s\n", 83 structures[parent], offset, type, member) 84 } 85 END { 86 for (struct in structures) { 87 printf("struct %s_lite {\n", struct); 88 n = split(structures[struct], members, "\n") 89 for (i = 1; i < n; i++) { 90 for (j = i + 1; j < n; j++) { 91 split(members[i], ivar, " ") 92 split(members[j], jvar, " ") 93 if (jvar[1] < ivar[1]) { 94 tmp = members[i] 95 members[i] = members[j] 96 members[j] = tmp 97 } 98 } 99 } 100 off = "0" 101 for (i = 1; i < n; i++) { 102 split(members[i], m, " ") 103 printf "\tu_char\tpad_%s[%s - %s];\n", m[3], m[1], off 104 printf "\t%s\t%s;\n", m[2], m[3] 105 off = sprintf("(%s + sizeof(%s))", m[1], m[2]) 106 } 107 printf("};\n"); 108 } 109 } 110 ' 111 112 echo "#endif" 113 echo "#endif" 114} 115 116 117# 118#MAIN PROGGRAM 119# 120use_outfile="no" 121while getopts "o:" option 122do 123 case "$option" in 124 o) outfile="$OPTARG" 125 use_outfile="yes";; 126 *) usage;; 127 esac 128done 129shift $(($OPTIND - 1)) 130case $# in 1311) ;; 132*) usage;; 133esac 134 135if [ "$use_outfile" = "yes" ] 136then 137 work $1 3>"$outfile" >&3 3>&- 138else 139 work $1 140fi 141 142