[OFF TOPIC] Stops Pentiums dead (fwd)

B. James Phillippe (bryan@Terran.ORG)
Fri, 7 Nov 1997 22:37:21 -0800 (PST)

Hi folks,

I'm forwarding something that was posted by a friend to the
Seattle Linux Users mailing list. FWIW, I tried it on my vanilla P200 as
a regular user and it froze my box solid. I'm yanking the Pent now for a
Cyrix 6x86 to see if it has the problem also. I heard a rumor that AMD
K6's were not affected.


B. James Phillippe <bryan@Terran.ORG>
UNIX, Linux, networks, C, Perl, Java, etc.
NIC:BJP4 # http://w3.terran.org/~bryan

---------- Forwarded message ---------- Subject: Stops Pentiums dead Date: Fri, 7 Nov 1997 16:54:46 -0800 (PST) From: Liem Bahneman <roland@cobaltgroup.com> To: Linux Mailing List <linux-list@ssc.com>

Horrible opcode bug on the pentiums. I hope none of you are pentium-based ISPs:

char x [5] = { 0xf0, 0x0f, 0xc7, 0xc8 };
main ()
        void (*f)() = x;


apparent byte code: vx:cmpxchg

locks up any pentium cpu, even from user-space, on any OS.


- liem

============================================================================ Liem Bahneman roland@cobaltgroup.com Senior Systems Administrator http://www.cobaltgroup.com/~roland The Cobalt Group (206) 269-6363 x300 Seattle, Washington F(206) 269-6350

========================================================================= Contributions/Posts To: linux-list@ssc.com To Unsubscribe: linux-list-request@ssc.com, "unsubscribe" in message body Report Problems to: owner-linux-list@ssc.com