[Openmcl-devel] BUG: kernel debugger on incorrect args to QUOTE (armel)

Gary Byers gb at clozure.com
Wed Nov 23 23:35:38 PST 2011

FWIW, this works on (most) real ARM hardware because of an implementation
artifact.  It's depending on behavior that's undefined,  so an emulator
(or some piece of ARM hardware that I haven't tested on) can raise an
exception or do what was intended or pretty much whatever it feels like
doing (e.g., the bug's in CCL, not qemu.)

On Fri, 18 Nov 2011, Eric Marsden wrote:

>>>>>> "gb" == Gary Byers <gb at clozure.com> writes:
>  gb> That uses a very similar mechanism, only the software interrupt is
>  gb> "int $#xc7"; the address of that instruction is very near that of the
>  gb> instruction used in the (FUNCALL 'QUOTE ...) case.  If calling FOO
>  gb> signals a lisp error and calling QUOTE gets lost,  I'd be very suspicious
>  gb> that qemu isn't treating those two interrupts the same way; real hardware
>  gb> does so.
>  Yes, this works fine. I also checked that the kernel svn revision is
>  the same as that of the image.
> ,----
> | Welcome to Clozure Common Lisp Version 1.8-dev-r15074M-trunk  (LinuxARM32)!
> | ? (foo)
> | > Error: Undefined function FOO called with arguments () .
> | > While executing: CCL::TOPLEVEL-EVAL, in process listener(1).
> `----
>  I have a pandaboard that I need to configure; I'll check with that.
> -- 
> Eric Marsden
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