Re: [avr-gcc-list] Bug35013 - Incomplete check for pm() annotation

[Andrew Hutchinson]

Thanks Eric , that was it.

Unfortunately it is only linker WARNING and easily missed during 
compilation.


Andy


Weddington, Eric wrote:
>  
>
>   
> > -----Original Message-----
> > From: 
> > address@hidden 
> > [mailto:address@hidden
> > org] On Behalf Of Andrew Hutchinson
> > Sent: Saturday, February 16, 2008 2:23 PM
> > To: Wouter van Gulik; address@hidden
> > Subject: Re: [avr-gcc-list] Bug35013 - Incomplete check for 
> > pm() annotation
> >
> > Note that this bug is also related to:
> >
> > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27192
> >
> > which has similar issue generating "byte address" instead of word
> > address. Oddly my patch appears to fix  that without problem, using :
> >
> >   45 0014 80E0              ldi r24,lo8(pm(foo+512))
> >   46 0016 90E0              ldi r25,hi8(pm(foo+512))
> >   47 0018 9093 0000         sts (q)+1,r25
> >   48 001c 8093 0000         sts q,r24
> >
> >
> > So it would appear problem with pm(foo+1) is more complicated than it
> > appears.
> >
> > Ideas?
> >
> >     
>
> Functions are word aligned (16-bits). Does 'foo' evaluate to a pointer
> to word? Or does it evaluate to a pointer to a byte, which when adding
> one and then made into a pointer to flash (word aligned) doesn't give
> any meaningful object?
>
>
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