Paper Mario: The Thousand-Year Door Decompilation Project

Introduction

This repository contains work-in-progress source code decompiled from Paper Mario: The Thousand-Year Door (Japanese version, G8MJ01), based on symbol maps from the Paper Mario 2 demo. It does not currently try to match 1:1, but contains the same functionality.

Decompilation is the process of looking at the compiled bytecode for a program and writing code that produces the same bytecode, thus recovering some semblance of the original program (with originality, there is no way to know if it is actually "correct").

How to Compile

The build system requires a couple environment variables to be set for various tools that are needed to compile the project, these are:

SDK_BASE_PATH: Path to a 20-Apr-2004 Patch 1 Nintendo GameCube SDK installation (root has HW2 / include, from May 31, 2004).
MUSYX_BASE_PATH: Path to a MusyX 2.0 Patch 3 SDK installation (root has HW2 / include, from August 20, 2004).
MW_BASE_PATH: Path to a CodeWarrior 2.7 for GameCube installation (root has PowerPC_EABI_Support / PowerPC_EABI_Tools, from August 24, 2004).

Then, you need to install Python 3, run pip install regex colorama to install dependencies, and then you can run build.py to compile the project. If there are no errors (which can be common while decompiling a program), you should get build/G8MJ01.elf and build/G8MJ01.map with the compiled code.

How to Contribute

Currently, the project does not have an easy way to load all symbols needed for decompilation into a single binary. You will need to compile the doldecomp repo to get an elf that matches retail with function names, which you can load into IDA or Ghidra.

For variable names, the only way is to acquire a copy of the Paper Mario 2 Demo TGC from Demo Disc 2004.7.1/2004.8.1/2004.9.1 for the symbol maps that were used to port to retail.

License

This project is distributed under the MIT license. By contributing to this project, you agree to license your contribution under the MIT license to this project.

The copyright notice is currently under NWPlayer123, although that may need to change in the future (to e.g. "The TTYD Decompilation Team") if enough outside contributions are made. By contributing to this project, you also agree to this potential copyright/license change, should it need to happen.

Credits

Decompilation, Build System by NWPlayer123

Additional Help, Previous Work by PistonMiner, Jdaster64, SeekyCt, JasperRLZ

NWPlayer123 / PaperMario2