Add support for m68k architecture

[philpem]

The REcon 2018 slide deck suggests that some of the underlying tools behind Retdec support the Motorola M68k (aka 68000, CPU32) architecture.

What would be required to add support for M68K to Retdec?

[s3rvac]

Hi. Thank you for your interest in RetDec. To get a sense of what needs to be done to add support for a new architecture, you can take a look at #9 (Adding support for x86-64).

@PeterMatula I think it would be useful to write a list of all the required actions to add support for a new architecture to our wiki as this might be useful for many people in the future. What do you think?

[philpem]

I've forked Retdec and started adding M68K support on a branch:
https://github.com/philpem/retdec/tree/add-m68k-support

It looks like the next step would be to write some code to convert 68K binaries into LLVM IR using Capstone.

[PeterMatula]

I will put together some wiki page on this topic. In the meantime, you can take a look at these two repositories that are adding support for ARM64:

• https://github.com/MatejKastak/capstone-dumper/tree/master/src/capstone-dumper
  • It is a fork of https://github.com/avast-tl/capstone-dumper.
  • It adds support for dumping info for ARM64 architecture: https://github.com/MatejKastak/capstone-dumper/blob/master/src/capstone-dumper/arm64.cpp
  • I would suggest you start here and add support for m68k in https://github.com/avast-tl/capstone-dumper/blob/master/src/capstone-dumper/m68k.cpp.
  • This will give you:
    • Familiarity with Capstone and its m68k module.
    • Once done, a dumping tool that comes in handy when inspecting m68k instructions.
  • If you do this, don't forget to send us a pull request, we would like to have it in the original repository.
• https://github.com/MatejKastak/retdec/tree/arm-prep
  • It is a fork of the main RetDec repository.
  • It adds support for ARM64 architecture - mainly to capstone2llvmir library, but also to the whole framework. If you diff it with the master branch, you will see what needed to be changed in order to add a new architecture.

[PeterMatula]

The promised wiki page:
https://github.com/avast-tl/retdec/wiki/How-to-add-support-for-a-new-architecture