[Xen-changelog] [xen master] x86emul: shifts/rotates don't allow LOCK prefix

[patchbot@xxxxxxx]

commit f524268211f242fcd382d3d2c811687f5de6f552
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Jul 7 16:43:35 2017 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Jul 7 16:43:35 2017 +0200

    x86emul: shifts/rotates don't allow LOCK prefix
    
    ... just like e.g. SHLD/SHRD don't (see commit dee231b5a8 [x86emul:
    improve LOCK handling]).
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/x86_emulate/x86_emulate.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xen/arch/x86/x86_emulate/x86_emulate.c 
b/xen/arch/x86/x86_emulate/x86_emulate.c
index 87e84c6..6819ab3 100644
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -3853,6 +3853,7 @@ x86_emulate(
         break;
 
     case 0xc0 ... 0xc1: grp2: /* Grp2 */
+        generate_exception_if(lock_prefix, EXC_UD);
         switch ( modrm_reg & 7 )
         {
         case 0: /* rol */
--
generated by git-patchbot for /home/xen/git/xen.git#master

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