Xbox 360 Kernel Decompilation

A work-in-progress decompilation of The Xbox 360 Kernel.

This repository does not contain any game assets or assembly whatsoever. An existing copy of the kernel is required.

Supported versions:

• 21256.18_D (xboxkrnld.exe): Kernel version: 17489.0

The SHA1 hashes for the files are:

• a303e3404e8dd0b9e9defd38aa6c37e04eb19101 xboxkrnld.exe
• 625c54f4f273c66fd7a08e8b2ff7d1167983eeba xboxkrnld.pdb

Info

Join the Discord server

Dependencies

Windows

On Windows, it's highly recommended to use native tooling. WSL or msys2 are not required.
When running under WSL, objdiff is unable to get filesystem notifications for automatic rebuilds.

• Install Python and add it to %PATH%.
  • Also available from the Windows Store.
• Download ninja and add it to %PATH%.
  • Quick install via pip: pip install ninja

macOS

• Install ninja:

  brew install ninja
  

• Install wine-crossover:

  brew install --cask --no-quarantine gcenx/wine/wine-crossover
  

After OS upgrades, if macOS complains about Wine Crossover.app being unverified, you can unquarantine it using:

sudo xattr -rd com.apple.quarantine '/Applications/Wine Crossover.app'

Linux

• Install ninja.
• For non-x86(_64) platforms: Install wine from your package manager.
  • For x86(_64), wibo, a minimal 32-bit Windows binary wrapper, will be automatically downloaded and used.

Building

• Clone the repository:

  git clone https://github.com/AleBello7276/xkrnl-decomp.git
  

• Copy your game's disc image to orig/21256.18_D.

  • Supported formats: ISO (GCM), RVZ, WIA, WBFS, CISO, NFS, GCZ, TGC
  • After the initial build, the disc image can be deleted to save space.

• Configure:

  python configure.py
  

  To use a version other than 21256.18_D, specify it with --version. (not a thing currently)

• Build:

  ninja
  

Diffing

Once the initial build succeeds, an objdiff.json should exist in the project root.

Download the latest release from encounter/objdiff. Under project settings, set Project directory. The configuration should be loaded automatically.

Select an object from the left sidebar to begin diffing. Changes to the project will rebuild automatically: changes to source files, headers, configure.py, splits.txt or symbols.txt.