Re: [avr-gcc-list] Problem with array on the stack

[Cory Cross]

Weddington, Eric wrote:
> And what version are we talking about here?
Whoops, sorry: 4.3.5, from Debian unstable.

I will come up with a minimal test case.

Thanks,
Cory

>  
>
> > -----Original Message-----
> > From: 
> > address@hidden 
> > [mailto:address@hidden
> > org] On Behalf Of Cory Cross
> > Sent: Monday, September 06, 2010 4:47 PM
> > To: address@hidden
> > Subject: [avr-gcc-list] Problem with array on the stack
> >
> > Hi all,
> >
> > I had an array on the stack clobber a global array like so:
> >
> > uint16_t clobberee[3] = {0xFFFF,0xFFFF,0xFFFF};
> >
> > volatile uint8_t stuff[9][7];
> >
> > void process(uint8_t num) {
> >    uint8_t i,j;
> >    for(i=0;i<num;++i){
> >      uint8_t clobberer[7];
> >      for(j=0;j<7;++j)
> >         clobberer[j] = stuff[0][j];
> >    }
> > }
> >
> > When I made "clobberer" a global, everything worked fine. But 
> > with it on 
> > the stack there, the assembly loaded "0x0100" as the base 
> > address. When 
> > made a global, it used the global address and everything worked fine.
> >
> > I'm using the flags -mmcu=atmega168 -I. -gstabs   -Os -Wall 
> > -Wstrict-prototypes -fpack-struct -fshort-enums -std=gnu99 
> > -save-temps 
> > -ffunction-sections -ffreestanding
> >
> > If this is not my fault, I will try and come up with the simplist 
> > program demonstrating the problem.
> >
> > Thanks,
> > Cory
> >
> > _______________________________________________
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> > address@hidden
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