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import genassym and use it for sconst.h in kernel

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This commit is contained in:
Ben Gras 2012-03-30 18:35:18 +02:00
parent 18f3961189
commit 8c4cdbd3c5
9 changed files with 354 additions and 36 deletions
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2
kernel/Makefile
View file

@ -91,7 +91,7 @@ SRCS+= profile.c do_sprofile.c
debug.d: extracted-errno.h extracted-mfield.h extracted-mtype.h
CLEANFILES+=extracted-errno.h extracted-mfield.h extracted-mtype.h
CLEANFILES+=extracted-errno.h extracted-mfield.h extracted-mtype.h procoffsets.h
extracted-errno.h: extract-errno.sh ../include/errno.h
${_MKTARGET_CREATE}

17
kernel/arch/i386/Makefile.inc
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@ -2,7 +2,8 @@
# Makefile for arch-dependent kernel code
.include <bsd.own.mk>
.PATH: ${.CURDIR}/arch/${ARCH}
HERE=${.CURDIR}/arch/${ARCH}
.PATH: ${HERE}
SRCS+= arch_do_vmctl.c \
arch_clock.c \
do_int86.c \
@ -27,6 +28,20 @@ SRCS+= arch_do_vmctl.c \
arch_system.c \
pre_init.c
apic_asm.d klib.d mpx.d: procoffsets.h
# It's OK to hardcode the arch as i386 here as this and procoffsets.cf
# are i386-specific.
TMP=procoffsets.h.tmp
INCLS=../include/arch/i386/include/
PROCOFFSETSCF=procoffsets.cf
procoffsets.h: $(PROCOFFSETSCF) kernel.h proc.h $(INCLS)/stackframe.h $(INCLS)/archtypes.h
${_MKTARGET_CREATE}
cat ${HERE}/$(PROCOFFSETSCF) | \
${TOOL_GENASSYM} -- ${CC} ${CFLAGS} ${CPPFLAGS} ${PROF} >$TMP && \
mv -f $TMP $@
.ifdef CONFIG_SMP
SRCS += arch_smp.c trampoline.S
.endif

29
kernel/arch/i386/procoffsets.cf Normal file
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@ -0,0 +1,29 @@
include "kernel.h"
include "proc.h"
struct proc
member GSREG p_reg.gs
member FSREG p_reg.fs
member ESREG p_reg.es
member DSREG p_reg.ds
member DIREG p_reg.di
member SIREG p_reg.si
member BPREG p_reg.fp
member STREG p_reg.st
member BXREG p_reg.bx
member DXREG p_reg.dx
member CXREG p_reg.cx
member AXREG p_reg.retreg
member RETADR p_reg.retadr
member PCREG p_reg.pc
member CSREG p_reg.cs
member PSWREG p_reg.psw
member SPREG p_reg.sp
member SSREG p_reg.ss
member FP_SAVE_AREA_P p_fpu_state
member P_LDT_SEL p_seg.p_ldt_sel
member P_CR3 p_seg.p_cr3
member P_CR3_V p_seg.p_cr3_v
member P_LDT p_seg.p_ldt

34
kernel/arch/i386/sconst.h
View file

@ -2,39 +2,7 @@
#define __SCONST_H__
#include "kernel/const.h"
/* Miscellaneous constants used in assembler code. */
W = _WORD_SIZE /* Machine word size. */
/* Offsets in struct proc. They MUST match proc.h. */
P_STACKBASE = 0
GSREG = P_STACKBASE
FSREG = GSREG+2 /* 386 introduces FS and GS segments*/
ESREG = FSREG+2
DSREG = ESREG+2
DIREG = DSREG+2
SIREG = DIREG+W
BPREG = SIREG+W
STREG = BPREG+W /* hole for another SP*/
BXREG = STREG+W
DXREG = BXREG+W
CXREG = DXREG+W
AXREG = CXREG+W
RETADR = AXREG+W /* return address for save() call*/
PCREG = RETADR+W
CSREG = PCREG+W
PSWREG = CSREG+W
SPREG = PSWREG+W
SSREG = SPREG+W
P_STACKTOP = SSREG+W
FP_SAVE_AREA_P = P_STACKTOP
P_LDT_SEL = FP_SAVE_AREA_P + 532
P_CR3 = P_LDT_SEL+W
P_CR3_V = P_CR3+4
P_LDT = P_CR3_V+W
P_MISC_FLAGS = P_LDT + 50
Msize = 9 /* size of a message in 32-bit words*/
#include "kernel/procoffsets.h"
/*
* offset to current process pointer right after trap, we assume we always have

1
tools/nbsd_ports
View file

@ -2,6 +2,7 @@
# Timestamp in UTC,minixpath,netbsdpath
# minixpath: path in Minix source tree (starting from /usr/src/)
# netbsdpath: path in BSD source tree (starting from src/)
2011/01/17 18:11:10,usr.bin/genassym
2012/02/10 16:16:12,usr.bin/su
2011/12/25 06:09:09,sys/arch/i386/stand
2012/02/10 16:16:12,share/zoneinfo

2
usr.bin/Makefile
View file

@ -4,7 +4,7 @@
# NetBSD imports
SUBDIR= indent m4 stat tic sed mkdep uniq seq du man \
apropos chpass newgrp passwd bzip2 bzip2recover gzip su
apropos chpass newgrp passwd bzip2 bzip2recover gzip su genassym
# Non-NetBSD imports
SUBDIR+= ministat

6
usr.bin/genassym/Makefile Normal file
View file

@ -0,0 +1,6 @@
# $NetBSD: Makefile,v 1.1 2005/06/05 18:19:54 thorpej Exp $
MAN= genassym.1
SCRIPTS= genassym.sh
.include <bsd.prog.mk>

92
usr.bin/genassym/genassym.1 Normal file
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@ -0,0 +1,92 @@
.\" $NetBSD: genassym.1,v 1.5 2010/04/13 09:01:10 jruoho Exp $
.\"
.\" Copyright (c) 1997 Matthias Pfaller.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd April 13, 2010
.Dt GENASSYM 1
.Os
.Sh NAME
.Nm genassym
.Nd emit an assym.h file
.Sh SYNOPSIS
.Nm genassym
.Op Fl c
.Op Fl f
.Ar C compiler invocation
.Sh DESCRIPTION
.Nm
is a shell script normally used during the kernel build process to
create an assym.h file.
This file defines a number of cpp constants derived from the configuration
information
.Nm
reads from stdin. The generated file is used by kernel sources
written in assembler to gain access to information (e.g. structure
offsets and sizes) normally only known to the C compiler.
.Pp
Arguments to
.Nm
are usually of the form
.Ar ${CC} ${CFLAGS} ${CPPFLAGS}
where
.Ar ${CC}
is the C compiler used to compile the kernel, while
.Ar ${CFLAGS}
and
.Ar ${CPPFLAGS}
are flag arguments to the C compiler. The script creates a C source file
from its input. Then the C compiler is called according to the script's
arguments to compile this file.
.Pp
Normally
.Nm
instructs the C compiler to create an assembler source from the constructed
C source. The resulting file is then processed to extract the information
needed to create the assym.h file. The
.Fl c
flag instructs
.Nm
to create slightly different code, generate an executable from this code
and run it. In both cases the assym.h file is written to stdout.
The
.Fl f
flag instructs
.Nm
to create forth code.
.Sh DIAGNOSTICS
Either self-explanatory, or generated by one of the programs
called from the script.
.Sh SEE ALSO
.Xr genassym.cf 5
.Sh HISTORY
The
.Nm
command appeared in
.Nx 1.3
as
.Dq genassym.sh
in
.Pa /usr/src/sys/kern .
It became a userland utility in
.Nx 4.0 .

207
usr.bin/genassym/genassym.sh Normal file
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@ -0,0 +1,207 @@
#!/bin/sh -
# $NetBSD: genassym.sh,v 1.6 2009/11/28 20:30:01 dsl Exp $
#
# Copyright (c) 1997 Matthias Pfaller.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
progname=${0}
: ${AWK:=awk}
ccode=0 # generate temporary C file, compile it, execute result
fcode=0 # generate Forth code
usage()
{
echo "usage: ${progname} [-c | -f] -- compiler command" >&2
}
while getopts cf i
do
case "$i" in
c)
ccode=1
;;
f)
fcode=1
;;
esac
done
shift $(($OPTIND - 1))
if [ $# -eq 0 ]; then
usage
exit 1
fi
# Deal with any leading environment settings..
while [ "$1" ]
do
case "$1" in
*=*)
eval export "$1"
shift
;;
*)
break
;;
esac
done
genassym_temp=/tmp/genassym.$$
if ! mkdir $genassym_temp; then
echo "${progname}: unable to create temporary directory" >&2
exit 1
fi
trap "rm -rf $genassym_temp" 0 1 2 3 15
$AWK '
BEGIN {
printf("#define offsetof(type, member) ((size_t)(&((type *)0)->member))\n");
defining = 0;
type = "long";
asmtype = "n";
asmprint = "";
}
{
doing_member = 0;
}
$0 ~ /^[ \t]*#.*/ || $0 ~ /^[ \t]*$/ {
# Just ignore comments and empty lines
next;
}
$0 ~ /^config[ \t]/ {
type = $2;
asmtype = $3;
asmprint = $4;
next;
}
/^include[ \t]/ {
if (defining != 0) {
defining = 0;
printf("}\n");
}
printf("#%s\n", $0);
next;
}
$0 ~ /^if[ \t]/ ||
$0 ~ /^ifdef[ \t]/ ||
$0 ~ /^ifndef[ \t]/ ||
$0 ~ /^else/ ||
$0 ~ /^elif[ \t]/ ||
$0 ~ /^endif/ {
printf("#%s\n", $0);
next;
}
/^struct[ \t]/ {
structname = $2;
$0 = "define " structname "_SIZEOF sizeof(struct " structname ")";
# fall through
}
/^member[ \t]/ {
if (NF > 2)
$0 = "define " $2 " offsetof(struct " structname ", " $3 ")";
else
$0 = "define " $2 " offsetof(struct " structname ", " $2 ")";
doing_member = 1;
# fall through
}
/^export[ \t]/ {
$0 = "define " $2 " " $2;
# fall through
}
/^define[ \t]/ {
if (defining == 0) {
defining = 1;
printf("void f" FNR "(void);\n");
printf("void f" FNR "(void) {\n");
if (ccode)
call[FNR] = "f" FNR;
defining = 1;
}
value = $0
gsub("^define[ \t]+[A-Za-z_][A-Za-z_0-9]*[ \t]+", "", value)
if (ccode)
printf("printf(\"#define " $2 " %%ld\\n\", (%s)" value ");\n", type);
else if (fcode) {
if (doing_member)
printf("__asm(\"XYZZY : %s d# %%%s0 + ;\" : : \"%s\" (%s));\n", $2, asmprint, asmtype, value);
else
printf("__asm(\"XYZZY d# %%%s0 constant %s\" : : \"%s\" (%s));\n", asmprint, $2, asmtype, value);
} else
printf("__asm(\"XYZZY %s %%%s0\" : : \"%s\" (%s));\n", $2, asmprint, asmtype, value);
next;
}
/^quote[ \t]/ {
gsub("^quote[ \t]+", "");
print;
next;
}
{
printf("syntax error in line %d\n", FNR) >"/dev/stderr";
exit(1);
}
END {
if (defining != 0) {
defining = 0;
printf("}\n");
}
if (ccode) {
printf("int main(int argc, char **argv) {");
for (i in call)
printf(call[i] "();");
printf("return(0); }\n");
}
}
' ccode=$ccode fcode=$fcode > ${genassym_temp}/assym.c || exit 1
if [ $ccode = 1 ] ; then
"$@" ${genassym_temp}/assym.c -o ${genassym_temp}/genassym && \
${genassym_temp}/genassym
elif [ $fcode = 1 ]; then
# Kill all of the "#" and "$" modifiers; locore.s already
# prepends the correct "constant" modifier.
"$@" -S ${genassym_temp}/assym.c -o - | sed -e 's/\$//g' | \
sed -n 's/.*XYZZY//gp'
else
# Kill all of the "#" and "$" modifiers; locore.s already
# prepends the correct "constant" modifier.
"$@" -S ${genassym_temp}/assym.c -o - > \
${genassym_temp}/genassym.out && \
sed -e 's/#//g' -e 's/\$//g' < ${genassym_temp}/genassym.out | \
sed -n 's/.*XYZZY/#define/gp'
fi