[Vm-dev] 64bit FFI?

Andreas Raab andreas.raab at gmx.de
Thu Feb 12 19:24:12 UTC 2009

Eliot Miranda wrote:
> So I don't see how this allows one to have a 64-bit VM that can run true 
> 64-bit images.  What am I missing?

You are mostly confused about the various combinations ;-) Let's start 
from first principles: You can run 32bit images on top of 64 bit VMs. 
This is achieved by using oopForPointer/pointerForOop.

In order to run 64 bit images you need a 64 bit image to begin with. The 
64 bit VM doesn't auto-magically convert your 32bit image into a 64 bit 
one. This is done by SystemTracer and friends.

Does that help?

   - Andreas

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