Re: [avr-libc-dev] [bugs #11396] Large number jumps to hyperspace

[Russell Shaw]

Wojtek Kaniewski wrote:
> Joerg Wunsch wrote:
>
> > >  uint16_t baud=9600
> > >  uint16_t reg=16000000/(16*baud) - 1;
> >
> > > makes an atmega16 jump to some spurious place and crash.  Using
> > > avr-libc 1.0.5 avr-gcc (GCC) 3.4.3 GNU avr-ld version 2.15
> >
> > Anyway, as this code cannot `jump' at all (nothing is really
> > executed), do you perhaps have a complete compilable example where
> > this can be reproduced?
>
> what about __udivmodsi4? it's rather obvious that variable `baud' is 
> just an example and in the real code it's not constant. (but yes, it 
> still looks like a GCC bug.)

In the real code, uint16_t baud was set at 9600 using a const literal
passed as an array parameter.