DOS ain't dead

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

posted by RayeR , 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.

Complete thread:

• 64b long mode and VMX/VT-x tutorial and source examples - RayeR, 20.02.2015, 11:03 (Developers)
  • 64b long mode and VMX/VT-x tutorial and source examples - georgpotthast, 20.02.2015, 18:25
    • 64b long mode and VMX/VT-x tutorial and source examples - RayeR, 05.03.2015, 20:02
      • 64b long mode and VMX/VT-x tutorial and source examples - RayeR, 06.03.2015, 12:34
        • 64b long mode and VMX/VT-x tutorial and source examples - RayeR, 10.03.2015, 10:51
          • 64b long mode and VMX/VT-x tutorial and source examples - georgpotthast, 10.03.2015, 19:06
            • 64b long mode and VMX/VT-x tutorial and source examples - RayeR, 10.03.2015, 20:01
              • 64b long mode and VMX/VT-x tutorial and source examples - georgpotthast, 10.03.2015, 21:21
                • 64b long mode and VMX/VT-x tutorial and source examples - RayeR, 10.03.2015, 23:07
                  • xvisor - RayeR, 11.03.2015, 13:27
                    • xvisor - georgpotthast, 11.03.2015, 18:33
                      • xvisor - RayeR, 11.03.2015, 22:47
                        • xvisor - georgpotthast, 12.03.2015, 08:36
                          • xvisor - Rugxulo, 12.03.2015, 09:04
                            • xvisor - RayeR, 12.03.2015, 19:02
                              • xvisor - RayeR, 13.03.2015, 01:32
                                • xvisor - georgpotthast, 13.03.2015, 18:07
                                  • xvisor - RayeR, 13.03.2015, 19:18
                                    • xvisor - georgpotthast, 13.03.2015, 21:14
                                      • xvisor - Rugxulo, 15.03.2015, 05:15
                                        • xvisor - georgpotthast, 16.03.2015, 17:15