m68k/cpu32 TRAP instruction?

[Josef Wolf]

On Thu, Oct 04, 2018 at 06:33:57AM -0600, Jeff Law wrote:
> On 10/4/18 6:19 AM, Josef Wolf wrote:
> > Why does gcc use those instructions? There is nothing special in the code
> > which is now translated into those trap instructions. I don't use floating
> > point at all, so I don't see any reason to use those instructions (and crash
> > on them).
> >
> GCC will replace a NULL pointer dereference or division by zero with a
> trap instruction.

Is this described somewhere? I am pretty much sure that there is no NULL
pointer dereference and no division in this code. There must be something else.

In addition, the crash disappears, when I insert some no-op function call at
the beginning of one of those functions. This causes GCC to use other
registers for local variables.

-- 
Josef Wolf
jw@raven.inka.de