rabbitizer

MIPS instruction decoder API.

Features

• Should produce matching assembly.
• Fully written in C for fast decoding.
  • The library is completely allocation-less, in other words rabbitizer doesn't allocate in anything in the heap by itself.
• Other language bindings supported in this repo:
  • Python bindings
    • The minimal Python version is 3.7, older versions are not guaranteed to work.
  • C++ bindings
  • Rust bindings
• Simple per-word instruction decoding.
  • The library doesn't try to be too smart by processing multiple instructions at a time.
• Can perform validation checks for instructions.
• Provides many examination/grouping functions for instructions, allowing to simplify checking characteristics of an instruction and minimizing the need to check for specific instructions in a hardcoded way.
• Includes some minor tools to build your own pointer/symbol detection.
• Configurable, many features can be turned on and off.
• MIPS instructions features:
  • Named registers for MIPS VR4300's coprocessors.
  • Support for many pseudo-instructions.
  • Properly handle move to/from coprocessor instructions.
  • Support for numeric, o32, n32 and n64 ABI register names.
• Some workarounds for some specific compilers/assemblers:
  • SN64:
    • div/divu fix: tweaks a bit the produced div, divu and break instructions.
• Multiple MIPS architectures are supported:
  • Main focus on MIPS I, II and III architectures. Partial support for MIPS IV too.
  • N64 RSP instruction decoding support.
    • RSP decoding has been tested to build back to matching assemblies with armips.
  • R5900 (PS2's Emotion Engine processor) decoding support.

Non-features

In order to keep it simple and fast the following features will not be added:

• Pseudo-instructions which expands to more than one instruction.

Installing

Python bindings

The recommended way to install is using from the PyPi release, via pip:

pip install rabbitizer

In case you want to mess with the latest development version without wanting to clone the repository, then you could use the following command:

pip install git+https://github.com/Decompollaborate/rabbitizer.git@develop

NOTE: Installing the development version is not recommended. Proceed at your own risk.

See this package at https://pypi.org/project/rabbitizer/.

Rust bindings

Add this crate to your Cargo.toml via:

[build]
rabbitizer = "1.5.8"

See this crate at https://crates.io/crates/rabbitizer.

References

• MIPS CPU:

  • MIPS IV Instruction Set (Revision 3.2): https://www.cs.cmu.edu/afs/cs/academic/class/15740-f97/public/doc/mips-isa.pdf
  • MIPS Calling Convention Summary: https://courses.cs.washington.edu/courses/cse410/09sp/examples/MIPSCallingConventionsSummary.pdf
  • mipt-mips pseudo instructions: https://github.com/MIPT-ILab/mipt-mips/wiki/MIPS-pseudo-instructions

• N64's RSP (Reality Signal Processor):

  • Nintendo Ultra64 RSP Programmer’s Guide: https://ultra64.ca/files/documentation/silicon-graphics/SGI_Nintendo_64_RSP_Programmers_Guide.pdf
  • N64brew Reality Signal Processor/CPU Core: https://n64brew.dev/wiki/Reality_Signal_Processor/CPU_Core

• R5900:

  • EmotionEngine instruction decoding: https://psi-rockin.github.io/ps2tek/#eeinstructiondecoding
  • Official documentation from Toshiba: https://wiki.qemu.org/images/2/2a/C790.pdf
  • VU instruction manual: http://lukasz.dk/files/vu-instruction-manual.pdf
  • GNU binutils: https://github.com/bminor/binutils-gdb/blob/master/opcodes/mips-opc.c