Re: [avr-gcc-list] COMPILER Frame pointer bug!!!

[Christoph Plattner]

Again, the swapping here is not necessary ! After the interrupt is
enabled
again (restore SREG), it is guaranteed, that on instruction of the
current
code sequence is executed. So the SP_L writing is done, before any
interrupt
occurs.

With friendly regards
Christoph P.


Dmitry wrote:
> 
> Fellows!
> 
> The code is Ok, but it seems to me, that I got an interrupt on the SP update.
> 
> But anyway I think that lines out __SREG__,__tmp_reg__ and out __SP_L__,r28 
> should be swapped.
> ... also, I think that stack pointer should be latched by hardware during 
> read/write operations.
> 
> Thanks for all who replied
> 
> Dmitry
> 
> > At 21:26 17/11/2001 +0300, dimmy wrote:
> > >Fellows,
> > >
> > >I found  strange avr-gcc behaviour.
> > >
> > >If you declare a function with a variable number of arguments or the
> > >number of arguments is over 18 (actually, total number of bytes, required
> > >for arguments) or you allocate over 18 bytes inside the function, then
> > >avr-gcc disables interrupts on enter to the function and does not enable
> > >them anymore.
> > >
> > >This is valid only in case, when frame pointer cannot be eliminated or
> > >when no optimization enabled.
> > <snip>
> >
> >
> 
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