[egenix-users] SIGBUS from mx/BeeBase/mxBeeBase/btr.c on HP-UX, Alpha, IRIX, Solaris

[Albert Chin]

On Wed, Jan 11, 2006 at 10:20:19AM -0600, Albert Chin wrote:
> On Wed, Jan 11, 2006 at 05:00:25PM +0100, M.-A. Lemburg wrote:
> > Are you compiling this on a 64-bit machine ?
> 
> They are all 64-bit CPUs but we are building 32-bit objects.
> 
> > FWIW: When trying the test.py script on an AMD64 machine it
> > runs through fine.
> 
> Yeah, we tried on RHEL 3/AMD64 and 4/AMD64 with success.
> 
> > It's been ages since I last looked at the code, so it's hard
> > to tell what the problem could be.
> 
> What I don't understand is why this doesn't work:
>   *mkey1 = 0;
>   *(mkey1 + 1) = 0;
>   *(mkey1 + 2) = 0;
>   *(mkey1 + 3) = 1;
>   val = *mkey2;
>   ^^^^^^^^^^^^^ SIGBUS

I think it's a memory-alignment issue. Maybe unsigned longs on the
problematic platforms need to be aligned to an even address, or
something like that. If so, how to fix?

-- 
albert chin (china at thewrittenword.com)