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Ran-j
105 lines
2.6 KiB
Markdown
105 lines
2.6 KiB
Markdown
## PS2Recomp: PlayStation 2 Static Recompiler (Not ready)
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* Note this is an experiment and doesn't work as it should, feel free to open a PR to help the project.
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PS2Recomp is a tool designed to statically recompile PlayStation 2 ELF binaries into C++ code that can be compiled for any modern platform. This enables running PS2 games natively on PC and other platforms without traditional emulation.
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### Features
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* Translates MIPS R5900 instructions to C++ code
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* Supports PS2-specific 128-bit MMI instructions
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* Handles VU0 in macro mode
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* Supports relocations and overlays
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* Configurable via TOML files
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* Single-file or multi-file output options
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* Function stubbing and skipping
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### How It Works
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PS2Recomp works by:
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Parsing a PS2 ELF file to extract functions, symbols, and relocations
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Decoding the MIPS R5900 instructions in each function
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Translating those instructions to equivalent C++ code
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Generating a runtime that can execute the recompiled code
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The translated code is very literal, with each MIPS instruction mapping to a C++ operation. For example, `addiu $r4, $r4, 0x20` becomes `ctx->r4 = ADD32(ctx->r4, 0X20);`.
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### Requirements
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* CMake 3.20 or higher
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* C++20 compatible compiler (I only test with MSVC)
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* SSE4/AVX support for 128-bit operations
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#### Building
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```bash
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git clone --recurse-submodules https://github.com/ran-j/PS2Recomp.git
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cd PS2Recomp
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# Create build directory
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mkdir build
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cd build
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cmake ..
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cmake --build .
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```
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### Usage
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1. Create a configuration file (see `./ps2xRecomp/example_config.toml`)
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2. Run the recompiler:
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```
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./ps2recomp your_config.toml
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```
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Compile the generated C++ code
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Link with a runtime implementation
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### Configuration
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PS2Recomp uses TOML configuration files to specify:
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* Input ELF file
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* Output directory
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* Functions to stub or skip
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* Instruction patches
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#### Example configuration:
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```toml
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[general]
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input = "path/to/game.elf"
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output = "output/"
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single_file_output = false
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# Functions to stub
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stubs = ["printf", "malloc", "free"]
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# Functions to skip
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skip = ["abort", "exit"]
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# Patches
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[patches]
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instructions = [
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{ address = "0x100004", value = "0x00000000" }
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]
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```
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### Runtime
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To execute the recompiled code, you'll need to implement or use a runtime that provides:
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* Memory management
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* System call handling
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* PS2-specific hardware simulation
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A basic runtime lib is provided in `ps2xRuntime` folder.
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### Limitations
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* VU1 microcode support is limited
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* Graphics Synthesizer and other hardware components need external implementation
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* Some PS2-specific features may not be fully supported yet
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### Acknowledgments
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* Inspired by N64Recomp
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* Uses ELFIO for ELF parsing
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* Uses toml11 for TOML parsing
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* Uses fmt for string formatting
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