Re: Need help in understanding x86 syscall

Bodo Eggert
2005-08-11T13:42:08Z

Ukil a <ukil_a@yahoo.com> wrote:

> Now I had the doubt that if the the syscall
> implementation is very large will the scheduling and
> other interrupts be blocked for the whole time till
> the process returns from the ISR (because in an ISR by
> default the interrupts are disabled unless “sti” is
> called explicitly)?

According to my documentation it isn't. A software interrupt is a far call
with an extra pushf, and a hardware interrupt is protected against recursion
by the PIC, not by an interrupt flag.
--
Ich danke GMX dafür, die Verwendung meiner Adressen mittels per SPF
verbreiteten Lügen zu sabotieren.