Tool to extract CPU instructions from binary

[HenrikBengtsson]

(scribbling down an old idea of mine)

Background

Occasionally, we run into binaries that use CPU op codes that are not available on the machine it's running. Sometime this happens because we download and install pre-compiled binaries, sometimes because we build on a modern CPU architecture but then run on an older one. In the past, we've seen "illegal instruction" core dumps due to for instance a machine to supporting the AVX2 instruction.

Idea

Troubleshooting these problems can be tricky. Sometimes it's due to a dependency, you built years ago. It would be useful if one could at least use scan known binaries and libraries for CPU opcodes and print out a summary. It does not have to be perfect - only good enough to give suggestions.

Tools that can be useful for this:

• ldd
• objdump -d
• ...?