[PATCH/RFC] Change the program check exception from EXC_XFER_STD to EXC_XFER_EE.

[Paul Mackerras]

Kumar Gala writes:

> We don't need to rearrange anything, just put the local_irq_enable()  
> call in do_mathemu().  If we are a debugger than REASON_TRAP will  
> have to be set and we dont bother with do_mathemu() than.
> 
> Do you think we should also move the local_irq_enable() that exists  
> in the handler into emulate_instruction().

I'd rather have the local_irq_enable() calls in
program_check_exception() so they're all in one place, preferably with
a comment explaining why they're there.  Having an unpaired
local_irq_enable in do_mathemu() would seem a bit weird to me.

Paul.