Re: First FreeMWare release!

[Ramon van Handel]

Ulrich Weigand wrote:
> - simply forward *all* vectors >= 0x20
> 
> Real software interrupts won't reach the handlers anyway (they'll
> trap out to the virtualization layer), so every time our handler
> is called, it's due to an hardware interrupt (either PIC or APIC).

Uh, wait.  I may be being stupid here, bit why can't software interrupts
be forwarded to the virtualised code ?  I can imagine that we do the
opposite of what you propose:  explicitly forward PIC interrupts,
but in the handler check whether it was cause by an int instruction
or by the hardware.  That way we know how to handle it.

Also, I don't really like it that every interrupt is intercepted...
that's slow.  Is there something wrong with setting the user-mode
ISR entry point in the IDT for interrupts that cannot be deflected ?

Ramon