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> Terry A Davis • 8 years ago • edited > You'll love my 64-bit ring-0-only identity-mapped operating system. RIP
by recursive 5y ago
> Terry A Davis • 8 years ago • edited
> You'll love my 64-bit ring-0-only identity-mapped operating system.
RIP
- KMag 5y agoIt's a bit of a shame that Linux doesn't put the kernel at the low end of the address space and identity-map the kernel's address space. For one, calculating kernel address mappings would be slightly faster, and for two, it would allow putting 64-bit processes at the top of virtual memory, where pointers are NaN when bit-cast to pointers, so NaN-boxing language runtimes get a speed bump. I wonder how much software assumes it's being mapped in the lower portion of the address space.
- Gollapalli 5y agoI caught that too. It put a smile on my face. Might boot up TempleOS for a bit and play around with it later. F