From e6d84a3fa6c867594d9b572dddd4f4410708dbc9 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@felloff.net>
Date: Thu, 16 Jul 2015 08:49:24 +0200
Subject: [PATCH] aux/cpuid: make sure extended feature bits are available
 (fixes crash on the pentium II)

---
 sys/src/cmd/aux/cpuid.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/src/cmd/aux/cpuid.c b/sys/src/cmd/aux/cpuid.c
index a9a2da228..632add489 100644
--- a/sys/src/cmd/aux/cpuid.c
+++ b/sys/src/cmd/aux/cpuid.c
@@ -246,6 +246,8 @@ main(int argc, char **argv)
 		}else
 			funcs[i](i);
 	r = cpuid(0x80000000, 0);
+	if(r.ax < 0x80000000)
+		exits(nil);
 	r.ax -= 0x80000000;
 	for(i = 0; i <= r.ax; i++)
 		if(i >= nelem(extfuncs) || extfuncs[i] == nil || rflag){
@@ -253,5 +255,5 @@ main(int argc, char **argv)
 				stdfunc(0x80000000 | i);
 		}else
 			extfuncs[i](0x80000000 | i);
-	Bterm(out);
+	exits(nil);
 }