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[Qemu-devel] [PATCH] Fix cpuid KVM crash on i386


From: Lubomir Rintel
Subject: [Qemu-devel] [PATCH] Fix cpuid KVM crash on i386
Date: Tue, 03 Mar 2009 14:58:18 +0100

Cpuid should return into vec, not overwrite past address in count.
Changeset 6565 broke this.

Signed-off-by: Lubomir Rintel <address@hidden>

Index: target-i386/helper.c
===================================================================
--- target-i386/helper.c        (revision 6676)
+++ target-i386/helper.c        (working copy)
@@ -1418,10 +1418,10 @@
 #else
     asm volatile("pusha \n\t"
                  "cpuid \n\t"
-                 "mov %%eax, 0(%1) \n\t"
-                 "mov %%ebx, 4(%1) \n\t"
-                 "mov %%ecx, 8(%1) \n\t"
-                 "mov %%edx, 12(%1) \n\t"
+                 "mov %%eax, 0(%2) \n\t"
+                 "mov %%ebx, 4(%2) \n\t"
+                 "mov %%ecx, 8(%2) \n\t"
+                 "mov %%edx, 12(%2) \n\t"
                  "popa"
                  : : "a"(function), "c"(count), "S"(vec)
                  : "memory", "cc");






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