ARM ISR routines.

[Richard Earnshaw]

> On Sat, Jun 23, 2001 at 08:26:12AM +0100, Nick Clifton wrote:
> > I wonder which would be better, disabling the use of alloca, or
> > implementing the contortions necessary to establish a frame pointer
> > without corrupting any registers ?
> 
> Certainly the later.

Thus speaks the person who doesn't have to write the code :-)

Someday I'd like to drop support for APCS frames and move to the ATPCS 
which doesn't generally require a frame pointer; then GCC could do its own 
thing when it needs a "frame pointer" for its own internal reasons.  
However, that day isn't on us yet...

R.