# HG changeset patch
# User David Vrabel <david.vrabel@citrix.com>
# Date 1325778436 0
# Node ID 03781de56c31072266fb464e7dfeec133bcf0fb4
# Parent  94180a5a0c7c7d680ede2e54bd13f56ed43f452d
x86: emulate lea with two register operands correctly

An lea instruction with two register operands should raise an
undefined instruction exception.

Skype does such a instruction and will crash when starting if it does
not get the exception.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Keir Fraser <keir@xen.org>
Committed-by: Keir Fraser <keir@xen.org>

--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -2100,6 +2100,7 @@ x86_emulate(
     }
 
     case 0x8d: /* lea */
+        generate_exception_if(ea.type != OP_MEM, EXC_UD, -1);
         dst.val = ea.mem.off;
         break;