Lpc2000

Copying one register to another is done with the "mov" instruction:

unsigned long retval;
asm volatile ("mov sp, %0" : "=r" (retval) : /* no inputs */ );
return retval;

An alternative in this case would be:

unsigned long stackptr __asm("sp");
return stackptr;

Regards,
Richard Duits


Bill Knight wrote:

> On Mon, 11 Jul 2005 15:00:32 -0000, xjag74 wrote:
>
> >Hi,
>
> >I wonder why GCC don't compile that simple code:
>
> >static inline unsigned StackPointerValue(void)
> >{
> > unsigned long val;
> > asm volatile (" str R13, retval");
> > return val;
> >}
>
> >When I try to compile the following error appears:
> >"Internal_relocation (type: OFFSET_IMM) not fixed up"
>
> >What does that mean? How can I get that running?
>
>
> 1st, 'retval' is not 'val'
>
> I haven't compiled this but try
>
> static inline unsigned StackPointerValue(void)
>
> unsigned long retval;
> asm volatile (" str sp, %0" : "=r" (retval) : /* no inputs */ );
> return retval;
>
>
> Regards
> -Bill Knight
> R O SoftWare &
> http://www.theARMPatch.com
>
>
>
>
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