From 31a97096ec568b4f0263dfe555d0d85b21ce03b2 Mon Sep 17 00:00:00 2001
From: SarahW <SarahW@localhost>
Date: Sat, 4 Feb 2017 21:39:28 +0000
Subject: [PATCH] Trigger TS fault correctly on IRET with NT flag set when back
 link selector invalid. Fixes NTVDM issues with Windows 2000.

---
 src/x86seg.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/src/x86seg.c b/src/x86seg.c
index 364f4dd..bedf39e 100644
--- a/src/x86seg.c
+++ b/src/x86seg.c
@@ -2011,20 +2011,16 @@ void pmodeiret(int is32)
                 addr=seg&~7;
                 if (seg&4)
                 {
-                        if (addr>=ldt.limit)
-                        {
-                                pclog("TS Bigger than LDT limit %04X %04X IRET\n",seg,gdt.limit);
-                                x86gpf(NULL,seg&~3);
-                                return;
-                        }
-                        addr+=ldt.base;
+                        pclog("TS LDT %04X %04X IRET\n",seg,gdt.limit);
+                        x86ts(NULL,seg&~3);
+                        return;
                 }
                 else
                 {
                         if (addr>=gdt.limit)
                         {
                                 pclog("TS Bigger than GDT limit %04X %04X IRET\n",seg,gdt.limit);
-                                x86gpf(NULL,seg&~3);
+                                x86ts(NULL,seg&~3);
                                 return;
                         }
                         addr+=gdt.base;