Re: Cute SPARC CPU bug

Dmitry Kohmanyuk =?KOI8-R?B?5M3J1NLJyiDrz8jNwc7Ayw==?= (dk@GENESYSLAB.COM)
Fri, 24 Oct 1997 15:40:18 -0700 

On Fri, Oct 24, 1997 at 01:42:32PM -0400, Charles M. Hannum wrote:
> Compile the following:
>
> main(){while(1);}
>
> with `gcc -O' on a SPARC.  You get, roughly:
>
> L1:
>         b,a L1
>         retl
>
> Run it on a SS5/170.  Notice the machine is completely wedged.
> Power-cycle it.

don't have a SS5 to crash, but just to add to CPU bugs topic...

gcc_compiled.:
.lcomm _c.0,40
.text
        .align 2
.globl _main
_main:
        pushl %ebp
        movl %esp,%ebp
        movl $0,%eax

        pushaw
        popaw
        movl _c.0(%eax,%eax,4),%ebx

        pushl   $0
        call    _exit

        leave
        ret

this hangs 386 CPU solid.  Non-privileged.
Change _main to main to taste.

Ah, my PDP-11 assembly days...