Tools Used in 6.828
If you use the MIT Athena machines that run Linux, then all the
software tools you will need for this course are located in the 6.828
locker: just type 'add 6.828' to get access to them. If
you would like to compile and run the tools on your own machine,
however, here is the information you need. Of course, we cannot
guarantee that these tools will be portable to every possible machine
you might want to run them on; they should at least compile easily on
most recent versions of Linux, however.
It should be possible to get this development environment running
under windows with the help of
Cygwin. Install cygwin, and be
sure to install the flex and bison packages
(they are under the development header).
Compiler Toolchain
First, if you are using a platform that is not a standard x86 linux or
BSD, you will need the GNU C compiler toolchain, configured and built
as a cross-compiler for the target 'i386-jos-elf'.
You can download the specific versions we used via these links,
although more recent versions of gcc and binutils should work too:
Once you've unpacked these archives, run the following commands as root:
$ cd binutils-2.15
$ ./configure --target=i386-jos-elf
$ make
$ make install
$ cd ../gcc-3.4.1
$ ./configure --target=i386-jos-elf
$ make
$ make install
If there are errors compiling gcc when it gets to libstdc++, don't
worry about it.
Then you'll have in /usr/local/bin a bunch of binaries
with names like i386-jos-elf-gcc. It will also be
necessary to change the GNUMakefile used in the labs to use
i386-jos-elf-gcc instead of gcc. There
are instructions for how to do this inside of GNUMakefile.
Bochs Emulator
Bochs version 2.1.1 is set up on athena for x86 machines. If you want
to use the same version on your home machine, you have two options.
- Copy the binaries from athena. Run the following commands as root:
cd /usr/local/bin
scp username@athena.dialup.mit.edu:/mit/6.828/bin/bochs-bin bochs
cd /usr/local/share
scp -r username@athena.dialup.mit.edu:/mit/6.828/share/bochs bochs
- The other option is to download, compile, and install bochs from
the source archive. This is the only option if you want to run bochs
under a different OS or on a different architecture. If you download
a prebuilt version of bochs, it will not be compiled with the same
options as we use for the class.
The latest stable version of bochs is 2.1.1, and it can be
downloaded from the Bochs
downoad page. However, this version has some issues where triple
faults will cause Bochs to hang. We are currently using a recent CVS
snapshot on athena. If you choose to use the CVS snapshot on your
home machine, you will need to update the instructions below
accordingly.
You may also want to run ./configure --help and look at the
available options. The --prefix= option can be very
useful.
tar xzvf bochs-2.1.1.tar.gz
cd bochs-2.1.1
./configure --enable-disasm \
--enable-debugger \
--enable-new-pit \
--enable-all-optimizations \
--enable-4meg-pages \
--enable-global-pages \
--enable-pae \
--enable-all-optimizations \
--disable-reset-on-triple-fault \
--with-all-libs
make
make install
If you wish to use a different UI than the default one, modify your
.bochsrc file accordingly. See the
bochsrc documentation. It should also be possible to just run
man bochsrc.
If you are compiling on a non-x86 platform or on windows, it may be
necessary to remove the --enable-all-optimizations flag.
If the make install step fails, it is probably possible
to install it manually by copying ./bochs to /usr/bin/bochs and
setting the environment variable BXSHARE to the path to
the bochs-2.1.1 directory.
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