|Luke Street 4a2bbbc6f8|
Rust tools for working with the PowerPC 750CL family of processors.
rustup components add rustfmt cargo run --package ppc750cl-genisa cargo build --release
python -m venv env source ./env/bin/activate pip install maturin maturin build -m ./disasm-py/Cargo.toml
Install module in dev env
maturin develop -m ./disasm-py/Cargo.toml python >>> import ppc750cl >>> ins = ppc750cl.Ins(addr=0x80006969, code=0x10400420) >>> str(ins) 'ps_merge00 f2, f0, f0' >>> ins.fields() [('frD', 2), ('frA', 0), ('frB', 0)] >>> ins.frD 2
For those unfamiliar with PowerPC, here are some basics.
- PowerPC 7xx is a family of RISC CPUs produced from 1997 to 2012.
- They operate with 32-bit words and every instruction is 32-bits wide.
- This project focuses (only) on compatibility with the PowerPC 750CL.
- This chip is famously packaged as codename "Broadway" for the Nintendo Wii.
- Its predecessor PowerPC 750CXe is used in the Nintendo GameCube.
- It adds a "paired-singles" SIMD unit and a bunch of other instructions.
The file isa.yaml contains a full definition of the PowerPC 750CL instruction set.
It powers the disassembler, assembler, and Rust/Python bindings code analysis tools.
Similarly to LLVM TableGen, the program
ppc750cl-genisa generates a Rust file implementing an instruction decoder.
Safety & Correctness
- This project does not use
unsafeRust code outside of testing utils.
- The disassembler has been fuzzed over all ~4.29 billion possible instructions (via
- It is safe to run the disassembler over untrusted byte arrays.
- However no guarantees on correctness are made (yet). Expect bugs.
- Performance isn't great but acceptable.
- Disassembling & printing: 600k insn/s (2.4 MB/s)
- Disassembling only: 6M insn/s (24 MB/s)