Re: [Qemu-devel] Armv5 target

[Lennert Buytenhek]

On Wed, Feb 02, 2005 at 01:26:37AM +0000, Paul Brook wrote:

> > > +    /* XXX: locking issue */
> > > +    if (is_write && page_unprotect(address, pc, puc)) {
> > > +        return 1;
> > > +    }
> > >      /* XXX: do more */
> > >      return 0;
> > >  }
> >
> > Sort of. Self-modifying code (e.g. stack trampolines) are still broken, and
> > the patch above should work.
> >
> > However I just tested it and it doesn't seem to work any more. It seems
> > that the SEGV handler is being passed an address of 0, rather than the
> > actual faulting location.
> >
> > This may be a host kernel/libc bug.
> 
> I just tried on a few different machines, and this is a host kernel bug 
> specific to one particular kernel (custom 2.6.9).

Do you have some example code that demonstrates this?


thanks,
Lennert