move to a higher-half kernel #96

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1. steveklabnik

   added

   enhancement

   Help wanted!

   on Oct 3, 2016
2. ketsuban commented on Oct 3, 2016

   

   ketsuban

   on Oct 3, 2016

   Last edited by ketsuban

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   Here's a link to the current commit to save me having to keep the master branch pristine in the interim. The main differences are in boot.asm and layout.ld, and should be fairly easy to port over to intermezzOS.

   As written any identity-mapped virtual addresses (like the VGA buffer at 0xB8000) will continue to work, because there's no code removing the original identity mapping—if you want to follow page faults to find them something like this should go somewhere in start64 before the jump to kmain.

   mov rax, pml4_table
   mov qword [rax], 0
   invlpg [0]