Re: IRQ vector assignment for system call exception

From: Ingo Molnar
Date: Sun Dec 11 2005 - 06:00:16 EST



* Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote:

> On Sat, 2005-12-10 at 18:50 +0530, Gaurav Dhiman wrote:
> > yes, definetely a historical reason. System libraries need to know
> > this vector to invoke system call.
>
> nowadays it's also mostly unused; sysenter and friends are used
> instead and they don't use this entry point.

note that some system-calls are still invoked via int80 by glibc, such
as fork() - even on sysenter/syscall capable CPUs.

Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/