Andrew Haley wrote:
Bernd Schmidt writes:
> David Daney wrote:
> > Perhaps not in general, but one unstated premise of this whole thread is
> > that for some GCC targets (most Unix like operating systems) you *can*
> > count on a SIGSEGV when you dereference a null pointer. The java front
> > end takes advantage of this fact to eliminate explicit checks for
> > dereferencing of null pointers.
>
> Oh.
>
> Speaking of which, has anyone ported gcj to a MMU-less uClinux platform yet?
It's impossible with the current config. This is because some of
libgcj is written on C++, and the C++ compiler FE does not insert
checks for null pointer accesses. I wrote a small patch to do this
but it was rejected.
Hmm, we can trap null pointer accesses, but I don't think we deliver
reliable SIGSEGV signals yet or provide a means of getting the faulting
address. If that was fixed, is there anything obvious that stands in
the way of a uClinux/uClibc port?
Bernd
