Vectorized Emulation: fuzzing at 2 trillion instructions per second

Re:Vectorized Emulation: fuzzing at 2 trillion instructions ... by pjc50 on Wednesday October 17, 2018 @05:48AM (#18237579)

You could also set the processor capability bits in the VM to pretend the processor is an older one, which will generally cause the application to fallback to a compatible piece of code. It's pretty rare in non-maths-heavy code.

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Re:Vectorized Emulation: fuzzing at 2 trillion instructions ... by gamozolabs on Wednesday October 17, 2018 @02:45PM (#18242302)

I do this as much as possible. I even go out of my way to compile things if I have access to source with a weaker version of x86, or even cross compile it for something like MIPS.

This is done however not due to a theoretical limitation of the tooling, but rather a practical one in that I haven't written SSE lifters and decoders yet. If I were to write these it would work just fine.

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