GDT Tutorial: Difference between revisions

You noticed that i didn't gave a real structure for <tt>GDT[]</tt>, didn't you? That's on purpose. The actual structure of descriptors is a little messy for reasons unknown. Base address are split on 3 different fields and you cannot encode any limit you want. Plus, here and there, you have flags that you need to set up properly if you want things to work.

Okay, that's rather ugly, but it's the most 'for dummies' i can come with ... hope you know about masking and shifting. You can hard-code that rather than convert it at runtime, of course. This code assumes that you only want 32-bit segments.