This repository provides an Xbox 360 kernel patch to enable unauthorized USB devices (e.g., custom controllers) to function by bypassing authentication and interface checks. It consists of two components: a Dashlaunch plugin (DLL) that patches the kernel at runtime via DllMain, and a XeBuild patch (binary) for permanent kernel modification. The plugin dynamically resolves kernel function addresses using ordinal exports or hardcoded addresses based on kernel version, then patches UsbdIsDeviceAuthenticated to return true and conditionally modifies WgcAddDevice (and WgcBindToUser for devkit 17489) using PowerPC instruction replacement. Build scripts automate patch generation for multiple kernel versions using a PowerPC toolchain.
Xenia is a research-grade emulator for the Xbox 360, written in C++ with a focus on accuracy and performance. It translates PowerPC (PPC) guest code into x64 machine code via a custom JIT compiler (HIR → x64 backend) and emulates the Xenos GPU using D3D12 and Vulkan backends, including shader translation from Xbox ucode to HLSL/SPIR-V. The system also emulates kernel subsystems (XAM, Xboxkrnl), audio (XMA decoding via XAudio2/SDL), input (XInput, keyboard, SDL), and the virtual file system (STFS containers, disc images, host paths). The architecture is modular with clear subsystem boundaries (base, cpu, gpu, apu, hid, kernel, vfs, ui), each with platform-specific implementations for Windows, Linux, and Android. Key entry points include the main emulator window (xenia_main.cc), the CPU processor (processor.h), the GPU graphics system (graphics_system.h), and the kernel state manager (kernel_state.h). The emulator is primarily a desktop application but includes Android support and several standalone tools for shader compilation, GPU trace analysis, and API scanning.