On Sunday 27 October 2002 03:48, Luca Barbieri wrote:
> Short explaination:
> This patch implements a feature called "x86 multiring", which is a
> shorthand for x86 multiple user-mode privilege rings support.
> It allows user-mode programs to create DPL 1 and 2 segments and get a
> modifiable per-process copy of IDT.
>
> User Mode Linux can use these features to implement a syscall mechanism
> identical to the one used by the kernel-mode kernel, and thus much
> faster than the current one, with free memory protection and with zero
> context switches.
>
> Wine could also use it to achieve fast syscall-level emulation of
> Windows NT (and, to a lesser extent, Windows 3.1 and 9x).
Karim once talked about doing a flavor of Adeos that would drop a running
kernel into ring 1 as a result of insmodding an Adeos module, which would
allow Adeos to combine an unmodified Linux kernel with a realtime executive.
-- Daniel - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Thu Oct 31 2002 - 22:00:36 EST