Re: [parisc-linux] Unaligned access failures with apt-get on SMP K460.

[Ryan Bradetich <rbradetich@uswest.net>]

Dave,

This is the apt-get from debian unstable ... so if I had to guess
I would assume that it is:

||/ Name           Version        Description
+++-==============-==============-============================================
ii  gcc            3.0.4-6        The GNU C compiler.

any way I can tell from the binary?

thanks,

- Ryan


On Sun, 2002-06-16 at 20:31, John David Anglin wrote:
> > > The instruction causing the unaligned trap is:
> > > 0x4005e47c <_ZN11DynamicMMap8AllocateEm+112>:	stw r21,8(sr0,r3)
> > > 
> > > As you can see from r3 (403ce08c) in the register dump is aligned on a
> > > 4-byte boundry.  So the question is why is this trap being executed?
> > 
> > Maybe the message is misleading.  It looks as if the insn may be trying
> > to write to readonly memory based of the value of r3.
> 
> Sorry, this is wrong.  Was _ZN11DynamicMMap8AllocateEm compiled with
> gcc-3.2?  It looks as if C++ exceptions may be involved.  This only
> has a chance of working with 3.2.  I suspect that an exception handler
> is involved because r20 is not valid across calls and r20/r21 are
> used in C++ exceptions.  The call looks to be a millicode call which
> might be part of the problem.
> 
> Dave
> -- 
> J. David Anglin                                  dave.anglin@nrc.ca
> National Research Council of Canada              (613) 990-0752 (FAX: 952-6605)
>