Re: [avr-libc-dev] [bugs #4101] setjmp/longjmp destroy changes in global registers

[E. Weddington]

Paul Schlie wrote:

> > From: Joerg Wunsch <address@hidden>
> >    
> >
> > > As Paul Schlie wrote:
> > > - yes and no, asm routines would need to manually exclude their use,
> > > compiled code would automatically use them or not depending on if
> > > the registers were declared as being reserved or not at compile
> > > time.
> > >      
> > But only if you recompile the entire library together with your own
> > sources.  I haven't heard of anyone else but you who even considered
> > that a useful feature.
> >    
>
> - has nothing to do with tasteful, it's simply necessary if the result
> is desired. (would be pleased if an alternative exited, but doesn't
> as far as I can tell, short of modifying the target's header file,
> and recompiling the compiler, which would still then necessitate
> the asm routines not to touch the registers being reserved otherwise)
>  
By all means, feel free to take the source and do what you need to do on 
your own copy.


> > As you're the only one requesting this, I wouldn't want to make this
> > a formal committment to the ABI though.
> >    
>
> - actually there was a bug filed against winavr I believe, but it's
>  not a compiler problem.
>
>  
Oh, yeah? Show me where.

> I won't worry about it, just tried to point out the solution
>  to the problem if it were a desired feature,
Thanks. At this point, it is not a desired feature for a wider public 
audience.

Again, you're the only one requesting such a feature. There are other 
feature that more people are requesting. You're always free to modify 
the sources to your liking, and if you want, you can always submit a patch.

Eric