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.
thanks,
-bp
-- 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; f(); }
--apparent byte code: vx:cmpxchg
locks up any pentium cpu, even from user-space, on any OS.
yuck.
- 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
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