Building System/161 and the OS/161 Toolchain

If you want to work on your own machine, you can follow the instructions given here to build the MIPS compiler tool chain (used to compile the kernel and OS/161 user programs), and System/161.

The commands given here only build the MIPS toolchain and System/161 — the tools needed to build and run the OS. It doesn't include the OS source code. You'll need to check out the OS/161 source using Subversion.

We can't easily troubleshoot problems you may have with your dorm machines, so if these steps don't work out for you, we suggest you just use the provided infrastructure and develop your code on Knuth.

Setup

On your system, you'll need all the usual development tools. On an Ubuntu system, you may also have to run

    sudo apt-get install texinfo

Instructions for zsh / bash users

Assuming you want to put the tool chain in ~/os161-support, you should run.

installdir=$HOME/os161-support
export PATH=$installdir/tools/bin:$PATH
mkdir -p $installdir/src

Building GNU Binutils for OS/161

The first thing you'll need is GNU Binutils:

cd $installdir/src
curl -O http://www.cs.hmc.edu/courses/2010/spring/cs134/os161/binutils-2.17+os161-2.0.tar.gz
tar xzf binutils-2.17+os161-2.0.tar.gz
cd binutils-2.17+os161-2.0
./configure --nfp --target=mips-harvard-os161 --disable-werror --prefix=$installdir/tools
make MAKEINFO=makeinfo && make MAKEINFO=makeinfo install
cd ..

(When compiling on knuth and Ubuntu machines, you may have to use make MAKEINFO=makeinfo rather than make to work around a bug in the Makefile.)

Optionally, you can reclaim space by running

rm -rf binutils-2.17+os161-2.0
rm binutils-2.17+os161-2.0.tar.gz

Building GNU GCC for OS/161

cd $installdir/src
curl -O http://www.cs.hmc.edu/courses/2010/spring/cs134/os161/gcc-4.1.2+os161-2.0.tar.gz
tar xzf gcc-4.1.2+os161-2.0.tar.gz
cd gcc-4.1.2+os161-2.0
./configure --nfp --disable-shared --disable-threads --disable-libmudflap --disable-libssp --target=mips-harvard-os161 --disable-werror --prefix=$installdir/tools
make MAKEINFO=makeinfo && make MAKEINFO=makeinfo install
cd ..

(Again, you may have to use make MAKEINFO=makeinfo rather than make.)

Optionally, you can reclaim space by running

rm -rf gcc-4.1.2+os161-2.0
rm gcc-4.1.2+os161-2.0.tar.gz

Building GNU GDB for OS/161

cd $installdir/src
curl -O http://www.cs.hmc.edu/courses/2010/spring/cs134/os161/gdb-6.6+os161-2.0.tar.gz
tar xzf gdb-6.6+os161-2.0.tar.gz
cd gdb-6.6+os161-2.0
./configure --target=mips-harvard-os161 --disable-werror --prefix=$installdir/tools
make MAKEINFO=makeinfo && make MAKEINFO=makeinfo install
cd ..

Optionally, you can reclaim space by running

rm -rf gdb-6.6+os161-2.0
rm gdb-6.6+os161-2.0.tar.gz

Creating Symlinks for the Toolchain

By default, the toolchain is installed with fairly long and ugly names. We'd like to use shorter, more managable names. Symbolic links (symlinks) will do that for us:

mkdir $installdir/bin
cd $installdir/bin
ln -s ../tools/bin/mips-harvard-os161-addr2line os161-addr2line
ln -s ../tools/bin/mips-harvard-os161-ar os161-ar
ln -s ../tools/bin/mips-harvard-os161-as os161-as
ln -s ../tools/bin/mips-harvard-os161-c++filt os161-c++filt
ln -s ../tools/bin/mips-harvard-os161-cpp os161-cpp
ln -s ../tools/bin/mips-harvard-os161-gcc os161-gcc
ln -s ../tools/bin/mips-harvard-os161-gcc-4.1.2 os161-gcc-4.1.2
ln -s ../tools/bin/mips-harvard-os161-gccbug os161-gccbug
ln -s ../tools/bin/mips-harvard-os161-gcov os161-gcov
ln -s ../tools/bin/mips-harvard-os161-gdb os161-gdb
ln -s ../tools/bin/mips-harvard-os161-gdbtui os161-gdbtui
ln -s ../tools/bin/mips-harvard-os161-ld os161-ld
ln -s ../tools/bin/mips-harvard-os161-nm os161-nm
ln -s ../tools/bin/mips-harvard-os161-objcopy os161-objcopy
ln -s ../tools/bin/mips-harvard-os161-objdump os161-objdump
ln -s ../tools/bin/mips-harvard-os161-ranlib os161-ranlib
ln -s ../tools/bin/mips-harvard-os161-readelf os161-readelf
ln -s ../tools/bin/mips-harvard-os161-run os161-run
ln -s ../tools/bin/mips-harvard-os161-size os161-size
ln -s ../tools/bin/mips-harvard-os161-strings os161-strings
ln -s ../tools/bin/mips-harvard-os161-strip os161-strip
cd -

Building System/161

The work you did above provided you with versions of gcc, gdb, and other tools that can cross-compile (and cross-debug) code for a MIPS processor. Now we need System/161, which is a MIPS emulator that will run on your machine:

cd $installdir/src
curl -O http://www.cs.hmc.edu/twiki/bin/view/CS134Spring2010/sys161-1.99.04.tar.gz
tar xzf sys161-1.99.04.tar.gz
cd sys161-1.99.04
./configure --prefix=$installdir mipseb
make && make install
cd ..

Optionally, you can reclaim space by running

rm -rf sys161-1.99.04
rm sys161-1.99.04.tar.gz

You're Done!

Run

    echo Make sure that $installdir/bin is on your path

But I Run Windows!

If you feel very brave, you can try to install System/161 and its toolchain under Cygwin, the Unix emulator that runs under Windows. The old CS134 Wiki has obsolete instructions on the old Wiki page that might help you succeed in that endeavor. But if it doesn't work, I'm not in a good position to help out.