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add os161 source tree
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‎exercise-simple/os161/CHANGES

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‎exercise-simple/os161/Makefile

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#
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# Toplevel makefile for OS/161.
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#
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#
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# Main rules:
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# all (default): depend and compile system; install into staging area
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# rebuild: likewise, but start with a clean slate.
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# fullrebuild: likewise, but start with a very clean slate.
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#
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# What all does, in order:
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# tools: depend and compile the tools used in build.
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# includes: install header files.
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# build: depend and compile the system.
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#
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# Other targets:
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# depend: just update make dependency information.
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# tags: generate/regenerate "tags" files.
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# install: install into $(OSTREE).
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# clean: remove generated files.
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# distclean: remove all generated files.
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#
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TOP=.
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.include "$(TOP)/mk/os161.config.mk"
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all:; # make this first
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MKDIRS=$(OSTREE)
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.include "$(TOP)/mk/os161.mkdirs.mk"
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all: tools .WAIT includes .WAIT build
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rebuild:
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$(MAKE) clean
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$(MAKE) all
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fullrebuild:
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$(MAKE) distclean
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$(MAKE) all
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# currently no tools required, hence no tools/ dir or work to do
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tools:
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@true
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build:
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(cd user && $(MAKE) build)
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(cd man && $(MAKE) install-staging)
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includes tags depend:
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(cd kern && $(MAKE) $@)
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(cd user && $(MAKE) $@)
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clean:
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(cd kern && $(MAKE) $@)
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(cd user && $(MAKE) $@)
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rm -rf $(INSTALLTOP)
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distclean: clean
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rm -rf $(WORKDIR)
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install: $(OSTREE)
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(cd $(INSTALLTOP) && tar -cf - .) | (cd $(OSTREE) && tar -xvf -)
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.PHONY: all rebuild fullrebuild tools build includes tags depend
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.PHONY: clean distclean
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# old BSD name, same as distclean
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cleandir: distclean
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.PHONY: cleandir

‎exercise-simple/os161/README

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Version 1.99.05 of OS/161

‎exercise-simple/os161/common/gcc-millicode/README

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These are support functions needed by gcc to perform operations on
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64-bit integer types on 32-bit machines. The names are meaningful to
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the gcc back end. The term "millicode" is sometimes used to describe
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such compiler support code.
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This code was taken from NetBSD's src/common/lib/libc/quad, and
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polished some for OS/161.

‎exercise-simple/os161/common/gcc-millicode/adddi3.c

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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* From:
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* @(#)adddi3.c 8.1 (Berkeley) 6/4/93
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* NetBSD: adddi3.c,v 1.1 2005/12/20 19:28:51 christos Exp
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*/
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#include "longlong.h"
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/*
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* Add two long longs. This is trivial since a one-bit carry from a
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* single unsigned int addition x+y occurs if and only if the sum x+y
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* is less than either x or y (the choice to compare with x or y is
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* arbitrary).
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*/
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long long
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__adddi3(long long a, long long b)
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{
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union uu aa, bb, sum;
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aa.ll = a;
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bb.ll = b;
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sum.ui[L] = aa.ui[L] + bb.ui[L];
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sum.ui[H] = aa.ui[H] + bb.ui[H] + (sum.ui[L] < bb.ui[L]);
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return (sum.ll);
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}

‎exercise-simple/os161/common/gcc-millicode/anddi3.c

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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* From:
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* @(#)anddi3.c 8.1 (Berkeley) 6/4/93
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* NetBSD: anddi3.c,v 1.1 2005/12/20 19:28:51 christos Exp
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*/
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#include "longlong.h"
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/*
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* Return a & b, in long long.
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*/
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long long
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__anddi3(long long a, long long b)
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{
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union uu aa, bb;
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aa.ll = a;
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bb.ll = b;
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aa.ui[0] &= bb.ui[0];
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aa.ui[1] &= bb.ui[1];
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return (aa.ll);
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}

‎exercise-simple/os161/common/gcc-millicode/ashldi3.c

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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* From:
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* @(#)ashldi3.c 8.1 (Berkeley) 6/4/93
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* NetBSD: ashldi3.c,v 1.1 2005/12/20 19:28:51 christos Exp
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*/
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#include "longlong.h"
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/*
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* Shift a (signed) long long value left (arithmetic shift left).
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* This is the same as logical shift left!
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*/
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long long
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__ashldi3(long long a, unsigned int shift)
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{
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union uu aa;
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if (shift == 0)
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return(a);
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aa.ll = a;
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if (shift >= INT_BITS) {
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aa.ui[H] = aa.ui[L] << (shift - INT_BITS);
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aa.ui[L] = 0;
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} else {
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aa.ui[H] = (aa.ui[H] << shift) |
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(aa.ui[L] >> (INT_BITS - shift));
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aa.ui[L] <<= shift;
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}
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return (aa.ll);
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}

‎exercise-simple/os161/common/gcc-millicode/ashrdi3.c

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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* From:
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* @(#)ashrdi3.c 8.1 (Berkeley) 6/4/93
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* NetBSD: ashrdi3.c,v 1.1 2005/12/20 19:28:51 christos Exp
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*/
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#include "longlong.h"
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/*
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* Shift a (signed) long long value right (arithmetic shift right).
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*/
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long long
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__ashrdi3(long long a, unsigned int shift)
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{
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union uu aa;
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if (shift == 0)
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return(a);
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aa.ll = a;
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if (shift >= INT_BITS) {
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int s;
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/*
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* Smear bits rightward using the machine's right-shift
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* method, whether that is sign extension or zero fill,
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* to get the `sign word' s. Note that shifting by
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* INT_BITS is undefined, so we shift (INT_BITS-1),
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* then 1 more, to get our answer.
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*/
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/* LINTED inherits machine dependency */
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s = (aa.si[H] >> (INT_BITS - 1)) >> 1;
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/* LINTED inherits machine dependency*/
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aa.ui[L] = aa.si[H] >> (shift - INT_BITS);
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aa.ui[H] = s;
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} else {
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aa.ui[L] = (aa.ui[L] >> shift) |
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(aa.ui[H] << (INT_BITS - shift));
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/* LINTED inherits machine dependency */
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aa.si[H] >>= shift;
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}
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return (aa.ll);
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}

‎exercise-simple/os161/common/gcc-millicode/cmpdi2.c

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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
7+
* contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
10+
* modification, are permitted provided that the following conditions
11+
* are met:
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* 1. Redistributions of source code must retain the above copyright
13+
* notice, this list of conditions and the following disclaimer.
14+
* 2. Redistributions in binary form must reproduce the above copyright
15+
* notice, this list of conditions and the following disclaimer in the
16+
* documentation and/or other materials provided with the distribution.
17+
* 3. Neither the name of the University nor the names of its contributors
18+
* may be used to endorse or promote products derived from this software
19+
* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22+
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23+
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24+
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25+
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26+
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27+
* 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
29+
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30+
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31+
* SUCH DAMAGE.
32+
*
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* From:
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* @(#)cmpdi2.c 8.1 (Berkeley) 6/4/93
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* NetBSD: cmpdi2.c,v 1.1 2005/12/20 19:28:51 christos Exp
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*/
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#include "longlong.h"
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/*
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* Return 0, 1, or 2 as a <, =, > b respectively.
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* Both a and b are considered signed---which means only the high word is
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* signed.
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*/
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int
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__cmpdi2(long long a, long long b)
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{
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union uu aa, bb;
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aa.ll = a;
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bb.ll = b;
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return (aa.si[H] < bb.si[H] ? 0 : aa.si[H] > bb.si[H] ? 2 :
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aa.ui[L] < bb.ui[L] ? 0 : aa.ui[L] > bb.ui[L] ? 2 : 1);
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}

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