From 03aed19145d1e9966871db2c274879e86f050d0c Mon Sep 17 00:00:00 2001
From: Nguyen Anh Quynh <aquynh@gmail.com>
Date: Tue, 22 Mar 2016 15:17:56 +0800
Subject: [PATCH] UC_OPT_WINDOWS_TIB: Windows 64 uses GS segment rather than FS
 segment for TIB

---
 qemu/target-i386/unicorn.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/qemu/target-i386/unicorn.c b/qemu/target-i386/unicorn.c
index 6f5435d2..b187cf9e 100644
--- a/qemu/target-i386/unicorn.c
+++ b/qemu/target-i386/unicorn.c
@@ -1128,8 +1128,18 @@ static uc_err x86_option(struct uc_struct *uc, uc_opt_type type, size_t value)
     if (type != UC_OPT_WINDOWS_TIB)
         return UC_ERR_OPT_INVALID;
 
-    // TODO: setup limit?
-    X86_CPU(uc, mycpu)->env.segs[R_FS].base = value;
+    switch(uc->mode) {
+        default:
+            break;
+        case UC_MODE_32:
+            // TODO: setup limit?
+            X86_CPU(uc, mycpu)->env.segs[R_FS].base = value;
+            break;
+        case UC_MODE_64:
+            // TODO: setup limit?
+            X86_CPU(uc, mycpu)->env.segs[R_GS].base = value;
+            break;
+    }
 
     return UC_ERR_OK;
 }