Re: How to detect STACKOVEFLOW on mips

["Maciej W. Rozycki" <macro@linux-mips.org>]

On Wed, 30 Jun 2010, David VomLehn wrote:

> > How about something like:
> > 
> > {
> >     long x;
> >     ...
> >     asm("move %0,$29":"=g"(x));
> >     ...
> > }
> 
> Depending on the version of gcc you are using, you should also be able
> to use __builtin_frame_address(), though I haven't tried this in the kernel.

 It works just fine with a zero argument; the usual restrictions apply to 
non-zero arguments.  Or alternatively an explicit register variable will 
do as suggested by Ralf.  Both approaches result in a bit better code than 
an explicit move; the former is portable to other platforms even. :)

  Maciej