[Xen-devel] [PATCH] Fix the missing code path for emulating "mov <reg>, DR?"

["Li, Xin B" <xin.b.li@xxxxxxxxx>]

I found the code path for emulating "mov <reg>, DR?" could not be
reached, this patch fixed it.
-Xin

--- a/xen/arch/x86/traps.c      Sun Jul 10 19:16:40 2005
+++ b/xen/arch/x86/traps.c      Mon Jul 11 16:37:18 2005
@@ -840,6 +840,11 @@
             UNLOCK_BIGLOCK(v->domain);
             break;

+        default:
+            goto fail;
+        }
+        break;
+
     case 0x23: /* MOV <reg>,DR? */
         opcode = insn_fetch(u8, 1, eip);
         modrm_reg |= (opcode >> 3) & 7;
@@ -847,11 +852,6 @@
         reg = decode_register(modrm_rm, regs, 0);
         if ( do_set_debugreg(modrm_reg, *reg) != 0 )
             goto fail;
-        break;
-
-        default:
-            goto fail;
-        }
         break;

     case 0x30: /* WRMSR */

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