Adding interrupt handler to FC3

[fdl at scottl.com]

I can't get request_irq() to work -- I get an error code indicating invalid
param values. Does anyone have sample code showing the correct use of this
function? I've tried many many permutations of params, without luck. Note
that there is no device associated with this interrupt (see below), which
will hopefully be say 0x90. Or, if anyone has a better idea as to how to
install an interrupt successfully on FC3, PLMK (nothing I've tried has
worked, although the techniques all work on FC4 -- I've tried making a new
IDT and using lidt, patching the existing IDT, etc.)

Thanks for any help.


> I am trying to implement a software callable interrupt so it 
> can be called by user-mode code to indicate that certain 
> events have occurred (it's part of an instrumentation package 
> I'm working on). I don't want to add a syscall since there is 
> other code on the system that is already monitoring int 0x80, 
> and I don't want these instrumentation interrupts to be 
> visible by the code already monitoring syscalls.
> 
> Unless someone has a more specific suggestion, I will look 
> into request_irq(). However, it appears that will require 
> creation of a new device (so I can pass the devname and 
> dev_id params), which I'd rather not do, since I'd rather 
> that the instrumentation impacts/changes the system as little 
> as possible.