Re: Installing a C function into the IDT

The Prisoner <nospam@[EMAIL PROTECTED]
> wrote:
> Hey-
> 
> I was reading about interrupts, and I got to thinking it would be a real

> neat thing to use interrupts for program-wide exception handling. What I

> haven't been able to find is a clear guide or example program for how to

> install a C function into the IDT. And what happens about passing
arguments?
> 
> I'd like to have something like this:
> 
> void malloc_failure();
> 
> Say I install this as interrupt slot 42, then I can do:
> 
> if(!(p=(int*)malloc(1000*4))) // array of 1000 ints
>   __asm__ ("int $0x42");
> 
> Is there any reason for this not to work? How do I set up the 
> interrupts? Would I need root privelidges to do that?
> 
> Thanks!!

All of what you are talking about is *completely* system-specific
and extremly non-****table.  Ask in some other group that caters to 
the specific system you are using.
I have no idea which system that might be since I am not familiar with
anything called an IDT or any system having an 'interrupt slot 42'.

(I will however note that on most modern general-purpose systems, normal
programs are not allowed to access anything connected to interrupts
directly,
so it seems unlikely that you can do whatever it is you are trying to do.)







-- 
<Insert your favourite quote here.>
Erik Trulsson
ertr1013@[EMAIL PROTECTED]