[sldev] How Far For Security?

[Callum Lerwick]

On Sun, Jun 22, 2008 at 7:14 AM, Argent Stonecutter <secret.argent at gmail.com>
wrote:

> I'm not asking "does the hardware exist", I'm asking "does the OS API
> exist"? You have to make zero-copy transfers to memory at specific
> *physical* addresses, bypassing the ubiquitous buffer cache which *is*
> handled by the CPU.


You mmap() the file, then pass it to the GL driver. The kernel takes care of
the rest. Stop acting like you know better than the kernel because you
don't.

This kind of thing normally requires at the least privileged access, and
> probably kernel access, on any OS that makes even the slightest effort of
> implementing multiuser protection. Does Windows really allow non-privileged
> processes to grovel around in memory maps?


I'm not talking about Windows.

http://www.tungstengraphics.com/wiki/index.php/TTM_Memory_Manager
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