Writing Multi-Segment Kernel

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skada
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Writing Multi-Segment Kernel

Post by skada »

Hello,
Instead of fixing gdt entries at 0 & 4GB... if I segment such that my kernel mode code starts at 1FFFF and end at FFFFF and data above that, when I flush gdt with new entries, my eip will jump by 1FFFF. And there is no code there! .. how should I compile my kernel so that all the code after long jmp is written @ 1FFFF ?
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Combuster
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Re: Writing Multi-Segment Kernel

Post by Combuster »

If your segment base already is some value, and you want the linear address to be the same value, what should the offset be?
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