bin_descend failures on linux about mcsema HOT 5 CLOSED

Hi,

I'll answer the second part first: the wide nop support should be pushed soon, along with many other changes (like newer LLVM version support). For now you have two options: edit x86Instrs_misc.cpp, add an entry for the wide nop and point it to the current NOP handler. Alternatively, you can try passing the -ignore-unsupported option to cfg_to_bc to ignore unsupported instructions during translation.

As for the jump tables, the current recommended solution is to use IDA for CFG recovery. It has much better jump table heuristics than we do. We would really like to make bin_descend work better, but other priorities have taken up most of our resources.

from mcsema.

Pushed supported for wide nop amongst many other new instructions.

from mcsema.

Thanks we'll give it a spin first thing next week, and report back (we tried the above suggestions,
which allowed us to build executables, but they would SIGSEGV.

Just a time frame question. How far down the track is 64 bits?

from mcsema.

Its not currently on our radar, but it shouldn't be too much of a problem. Most (all?) of the instruction translation is parametrized by bit width. The big changes that would be needed is finding and removing some 32-bit-isms, adding new registers, and probably 64-bit calling convention/stack layout for some of the callback/external call stuff.

from mcsema.

Closing since the issues seem to have been kind of resolved.

from mcsema.