[Xen-changelog] [xen-unstable] [XEN] Emulate AMD-defined two-byte NOP opcodes with ModRM.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxxx
# Date 1168791162 0
# Node ID 179453a859291bef5dd6ee2e577cec0b06b82c7e
# Parent  a6f10ffa07a09117cdeefc2ebfda93f883a8e09b
[XEN] Emulate AMD-defined two-byte NOP opcodes with ModRM.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
 xen/arch/x86/x86_emulate.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff -r a6f10ffa07a0 -r 179453a85929 xen/arch/x86/x86_emulate.c
--- a/xen/arch/x86/x86_emulate.c        Sun Jan 14 16:00:19 2007 +0000
+++ b/xen/arch/x86/x86_emulate.c        Sun Jan 14 16:12:42 2007 +0000
@@ -168,8 +168,11 @@ static uint8_t twobyte_table[256] = {
 static uint8_t twobyte_table[256] = {
     /* 0x00 - 0x0F */
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ImplicitOps|ModRM, 0, 0,
-    /* 0x10 - 0x1F */
-    0, 0, 0, 0, 0, 0, 0, 0, ImplicitOps|ModRM, 0, 0, 0, 0, 0, 0, 0,
+    /* 0x10 - 0x17 */
+    0, 0, 0, 0, 0, 0, 0, 0,
+    /* 0x18 - 0x1F */
+    ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM,
+    ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM,
     /* 0x20 - 0x2F */
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     /* 0x30 - 0x3F */
@@ -2052,6 +2055,7 @@ x86_emulate(
     {
     case 0x0d: /* GrpP (prefetch) */
     case 0x18: /* Grp16 (prefetch/nop) */
+    case 0x19 ... 0x1f: /* nop (amd-defined) */
         break;
 
     case 0x80 ... 0x8f: /* jcc (near) */ {

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