OPEMU for Linux for my local experiments

Before use read this

• mirh#1

Use original repo, this repo just for my experiments, or take code from this repo and add it in main repo if you need it :)

Notice

- [warning this is experimentall fork, can be broken]

• STATE - success working on

  • 6.12.22 (Debian)
  • 6.12.38 (Debian)
  • 6.16.30 (Debian)

• TODO

  • BUG: CRC SSE4.2 test FAILED! need check all variant crc opcodes + data types from value, from pointer, data sizes and others blablabla getmemoperand and his friends
    • maybe have other bugs need expect uncorrect calculate or data type cast in code
  • check working on Linux version 6.13+
    • issue -> mirh#1 (comment)
    • need integrate transparent buil if not compability
  • understend how all works :D
  • refractoring
  • more sepatare code
  • fix compiler warnings
  • add tests for all instructions
    • maybe use single test by instructtions on assembler
    • maybe use test code contains all test instructions (some other project contains hard SIMD optimisations)

Build

make

Load

sudo dmesg -w # open in another terminal window/tab for see logs if need
make load

In demesg see output OPEMU: module loaded == all okey

Run some SSE3/SSE4+ application and:

• if application working op_emu success emulate instructions
• if you see for example OPEMU: pminud xmm0, xmm1 and trap invalid opcode some instruction need implement in op_emu
• if you see only trap invalid opcode some instruction unknown for op_emu

Unload

make unload

---

mirh previos readme text from original

• https://github.com/mirh/opemu-linux

• This is an adaptation of the original Opcode Emulator from xnu-amd's repo for Linux.

• For the kernel module, and a few other things (fpins, SSE4.1...), I took some code from Meowthra's AVX+ OPEMU, which looks pretty good, but does not fit my needs (SSSE3, SSE4.1, & SSE4.2).

• POPCNT and CRC32 are all merit of Andy Vandijck instead.

What's working

• SSE3, SSSE3, SSE4.2 (mostly). CRC32 doesn't pass tests though.
• most SSE4.1 instructions are missing, I tried to add a few but it's not working well yet.