This is the SIGINT10 sample code for my x86 bootstrapping workshop.

To get started, just checkout the code, change into the root directory and execute a simple "make". The first thing that happens is that the complete cross-compiling toolchain is built. This is necessary because we want to have a stand-alone toolchain without any dependencies of your operating system.

Note that you will need to install all dependencies of binutils, gcc, gdb, nasm, qemu and bochs first for a sucessful build. This should only be a compiler on your host, mpfr and gmp, I think. If you have trouble you can set the environment variable V to get verbose output from my buildsystem. Example: make V=1

After that all the subprojects are build with your shiny new toolchain. To run the generated floppy or hdd images, just change to a subdirectory and execute a "make qemu" and off you go...

The toolchain itself is only built once. It even survives a "make clean". If you want to get rid of it, do a "make distclean". However, the first "make clean" in your project root will remove all the temporary files which were created during the toolchain build. So, you should execute this command directly after the first build of all projects finished sucessfully.

You can also build one subproject independently from all other subprojects. To do this, just stay in the directory of the subproject and do your "make" and "make qemu" there.

Sometimes, you are asked for your password. This is a sudo which is used to mount several floppy or hdd images to copy the compiled elf-file onto it. Nothing evil, see for yourself.

Have fun!

PS: Since I can only set one project URL in github you can find links to the slides I created down below. Unfortunately both presentations were in German, so the slides are in German, too. Sorry to all English-speaking people!

SigInt10: http://events.ccc.de/sigint/2010/wiki/Fahrplan/events/3890.de.html EH2011: http://wiki.hamburg.ccc.de/File:Eh11_workshop.pdf