import genassym and use it for sconst.h in kernel
This commit is contained in:
Ben Gras
@@ -4,7 +4,7 @@
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# NetBSD imports
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SUBDIR= indent m4 stat tic sed mkdep uniq seq du man \
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apropos chpass newgrp passwd bzip2 bzip2recover gzip su
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apropos chpass newgrp passwd bzip2 bzip2recover gzip su genassym
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# Non-NetBSD imports
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SUBDIR+= ministat
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6
usr.bin/genassym/Makefile
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6
usr.bin/genassym/Makefile
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@@ -0,0 +1,6 @@
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# $NetBSD: Makefile,v 1.1 2005/06/05 18:19:54 thorpej Exp $
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MAN= genassym.1
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SCRIPTS= genassym.sh
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.include <bsd.prog.mk>
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92
usr.bin/genassym/genassym.1
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92
usr.bin/genassym/genassym.1
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@@ -0,0 +1,92 @@
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.\" $NetBSD: genassym.1,v 1.5 2010/04/13 09:01:10 jruoho Exp $
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.\"
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.\" Copyright (c) 1997 Matthias Pfaller.
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.\" All rights reserved.
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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 ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd April 13, 2010
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.Dt GENASSYM 1
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.Os
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.Sh NAME
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.Nm genassym
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.Nd emit an assym.h file
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.Sh SYNOPSIS
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.Nm genassym
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.Op Fl c
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.Op Fl f
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.Ar C compiler invocation
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.Sh DESCRIPTION
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.Nm
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is a shell script normally used during the kernel build process to
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create an assym.h file.
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This file defines a number of cpp constants derived from the configuration
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information
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.Nm
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reads from stdin. The generated file is used by kernel sources
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written in assembler to gain access to information (e.g. structure
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offsets and sizes) normally only known to the C compiler.
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.Pp
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Arguments to
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.Nm
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are usually of the form
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.Ar ${CC} ${CFLAGS} ${CPPFLAGS}
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where
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.Ar ${CC}
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is the C compiler used to compile the kernel, while
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.Ar ${CFLAGS}
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and
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.Ar ${CPPFLAGS}
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are flag arguments to the C compiler. The script creates a C source file
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from its input. Then the C compiler is called according to the script's
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arguments to compile this file.
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.Pp
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Normally
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.Nm
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instructs the C compiler to create an assembler source from the constructed
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C source. The resulting file is then processed to extract the information
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needed to create the assym.h file. The
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.Fl c
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flag instructs
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.Nm
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to create slightly different code, generate an executable from this code
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and run it. In both cases the assym.h file is written to stdout.
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The
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.Fl f
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flag instructs
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.Nm
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to create forth code.
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.Sh DIAGNOSTICS
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Either self-explanatory, or generated by one of the programs
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called from the script.
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.Sh SEE ALSO
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.Xr genassym.cf 5
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Nx 1.3
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as
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.Dq genassym.sh
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in
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.Pa /usr/src/sys/kern .
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It became a userland utility in
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.Nx 4.0 .
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207
usr.bin/genassym/genassym.sh
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207
usr.bin/genassym/genassym.sh
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@@ -0,0 +1,207 @@
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#!/bin/sh -
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# $NetBSD: genassym.sh,v 1.6 2009/11/28 20:30:01 dsl Exp $
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#
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# Copyright (c) 1997 Matthias Pfaller.
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# All rights reserved.
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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 ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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progname=${0}
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: ${AWK:=awk}
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ccode=0 # generate temporary C file, compile it, execute result
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fcode=0 # generate Forth code
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usage()
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{
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echo "usage: ${progname} [-c | -f] -- compiler command" >&2
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}
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while getopts cf i
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do
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case "$i" in
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c)
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ccode=1
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;;
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f)
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fcode=1
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;;
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esac
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done
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shift $(($OPTIND - 1))
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if [ $# -eq 0 ]; then
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usage
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exit 1
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fi
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# Deal with any leading environment settings..
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while [ "$1" ]
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do
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case "$1" in
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*=*)
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eval export "$1"
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shift
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;;
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*)
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break
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;;
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esac
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done
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genassym_temp=/tmp/genassym.$$
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if ! mkdir $genassym_temp; then
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echo "${progname}: unable to create temporary directory" >&2
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exit 1
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fi
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trap "rm -rf $genassym_temp" 0 1 2 3 15
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$AWK '
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BEGIN {
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printf("#define offsetof(type, member) ((size_t)(&((type *)0)->member))\n");
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defining = 0;
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type = "long";
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asmtype = "n";
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asmprint = "";
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}
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{
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doing_member = 0;
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}
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$0 ~ /^[ \t]*#.*/ || $0 ~ /^[ \t]*$/ {
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# Just ignore comments and empty lines
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next;
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}
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$0 ~ /^config[ \t]/ {
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type = $2;
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asmtype = $3;
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asmprint = $4;
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next;
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}
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/^include[ \t]/ {
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if (defining != 0) {
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defining = 0;
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printf("}\n");
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}
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printf("#%s\n", $0);
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next;
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}
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$0 ~ /^if[ \t]/ ||
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$0 ~ /^ifdef[ \t]/ ||
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$0 ~ /^ifndef[ \t]/ ||
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$0 ~ /^else/ ||
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$0 ~ /^elif[ \t]/ ||
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$0 ~ /^endif/ {
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printf("#%s\n", $0);
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next;
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}
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/^struct[ \t]/ {
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structname = $2;
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$0 = "define " structname "_SIZEOF sizeof(struct " structname ")";
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# fall through
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}
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/^member[ \t]/ {
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if (NF > 2)
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$0 = "define " $2 " offsetof(struct " structname ", " $3 ")";
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else
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$0 = "define " $2 " offsetof(struct " structname ", " $2 ")";
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doing_member = 1;
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# fall through
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}
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/^export[ \t]/ {
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$0 = "define " $2 " " $2;
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# fall through
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}
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/^define[ \t]/ {
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if (defining == 0) {
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defining = 1;
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printf("void f" FNR "(void);\n");
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printf("void f" FNR "(void) {\n");
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if (ccode)
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call[FNR] = "f" FNR;
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defining = 1;
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}
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value = $0
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gsub("^define[ \t]+[A-Za-z_][A-Za-z_0-9]*[ \t]+", "", value)
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if (ccode)
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printf("printf(\"#define " $2 " %%ld\\n\", (%s)" value ");\n", type);
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else if (fcode) {
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if (doing_member)
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printf("__asm(\"XYZZY : %s d# %%%s0 + ;\" : : \"%s\" (%s));\n", $2, asmprint, asmtype, value);
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else
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printf("__asm(\"XYZZY d# %%%s0 constant %s\" : : \"%s\" (%s));\n", asmprint, $2, asmtype, value);
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} else
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printf("__asm(\"XYZZY %s %%%s0\" : : \"%s\" (%s));\n", $2, asmprint, asmtype, value);
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next;
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}
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/^quote[ \t]/ {
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gsub("^quote[ \t]+", "");
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print;
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next;
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}
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{
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printf("syntax error in line %d\n", FNR) >"/dev/stderr";
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exit(1);
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}
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END {
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if (defining != 0) {
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defining = 0;
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printf("}\n");
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}
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if (ccode) {
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printf("int main(int argc, char **argv) {");
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for (i in call)
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printf(call[i] "();");
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printf("return(0); }\n");
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}
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}
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' ccode=$ccode fcode=$fcode > ${genassym_temp}/assym.c || exit 1
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if [ $ccode = 1 ] ; then
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"$@" ${genassym_temp}/assym.c -o ${genassym_temp}/genassym && \
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${genassym_temp}/genassym
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elif [ $fcode = 1 ]; then
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# Kill all of the "#" and "$" modifiers; locore.s already
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# prepends the correct "constant" modifier.
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"$@" -S ${genassym_temp}/assym.c -o - | sed -e 's/\$//g' | \
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sed -n 's/.*XYZZY//gp'
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else
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# Kill all of the "#" and "$" modifiers; locore.s already
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# prepends the correct "constant" modifier.
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"$@" -S ${genassym_temp}/assym.c -o - > \
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${genassym_temp}/genassym.out && \
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sed -e 's/#//g' -e 's/\$//g' < ${genassym_temp}/genassym.out | \
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sed -n 's/.*XYZZY/#define/gp'
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fi
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