From f21fa3d966f7951a1d598d2d5fc6120afe6612f8 Mon Sep 17 00:00:00 2001
From: Nguyen Anh Quynh <aquynh@gmail.com>
Date: Sat, 12 Dec 2015 03:09:38 +0800
Subject: [PATCH] do not flush TB when l1_map is uninitialized. this fixes
 issue #280, #284

---
 qemu/translate-all.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/qemu/translate-all.c b/qemu/translate-all.c
index 2e1acb1a..088e7b40 100644
--- a/qemu/translate-all.c
+++ b/qemu/translate-all.c
@@ -807,6 +807,9 @@ static void page_flush_tb(struct uc_struct *uc)
 {
     int i;
 
+    if (uc->l1_map == NULL)
+        return;
+
     for (i = 0; i < V_L1_SIZE; i++) {
         page_flush_tb_1(V_L1_SHIFT / V_L2_BITS - 1, uc->l1_map + i);
     }