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64b long mode and VMX/VT-x tutorial and source examples (Developers)

posted by RayeR(R) Homepage, CZ, 05.03.2015, 20:02

Yes, I remember, that Japheth did some 64bit mode experiment years ago. I just wanted to share the examples I found. I didn't have time to go through yet.

I also played with Nova Hypervisor (there is some updated sources, no binary) but most apps I tried crashed it (probably everything pmode). I think about how complex would be to write a simple single-task hypervisor that will pass most of exceptions to real hardware and only traps some specific IO e.g. for SB emulation. AFAIK guest OS is usually run in CPL>0 that cause some problems because it was not designed for but it should be possible to run it in CLP 0 that probably remove protection of hypervisor code but maybe possible to reserve some small block of memory for it...
I also read that some trojans can run OS silently under hypervisor and traps keystrokes or so...

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DOS gives me freedom to unlimited HW access.

 

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