Why don't modern OSes use Ring1 and/or Ring2?

flat assembler
Message board for the users of flat assembler.

Index > OS Construction > Why don't modern OSes use Ring1 and/or Ring2?

Goto page Previous 1, 2

Author

Thread

f0dder

Joined: 19 Feb 2004
Posts: 3175
Location: Denmark

f0dder 24 May 2008, 04:07

Quote:

Well, we also have Virtualization to thank. AMD Pacifica and Intel VT instruction sets mean that you can if you so desire, completely isolate different execution environments.

Problem is, it doesn't. There are parts that aren't 100% emulated yet, and are very hard to trap... sorry that I can't divulge more than that, but it would be against commercial interest *grin*. VMX and the extensions are a good step, though.

24 May 2008, 04:07

Goto page Previous 1, 2

< Last Thread | Next Thread >

Forum Rules:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum