From 7328873681ce88bec3234e80450174c17b562352 Mon Sep 17 00:00:00 2001
From: Aleksandar Andrejevic <aandrejevic@reactos.org>
Date: Sat, 21 Sep 2013 00:41:41 +0000
Subject: [PATCH] [SOFT386] Implement external stack modification. [NTVDM]
 Implement EmulatorSetStack for NEW_EMULATOR.

svn path=/branches/ntvdm/; revision=60257
---
 include/reactos/libs/soft386/soft386.h |  4 ++++
 lib/soft386/soft386.c                  | 16 ++++++++++++++++
 subsystems/ntvdm/emulator.c            |  2 +-
 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/include/reactos/libs/soft386/soft386.h b/include/reactos/libs/soft386/soft386.h
index 50e23a22670..f3412ea34d8 100644
--- a/include/reactos/libs/soft386/soft386.h
+++ b/include/reactos/libs/soft386/soft386.h
@@ -341,6 +341,10 @@ VOID
 NTAPI
 Soft386ExecuteAt(PSOFT386_STATE State, USHORT Segment, ULONG Offset);
 
+VOID
+NTAPI
+Soft386SetStack(PSOFT386_STATE State, USHORT Segment, ULONG Offset);
+
 #endif // _SOFT386_H_
 
 /* EOF */
diff --git a/lib/soft386/soft386.c b/lib/soft386/soft386.c
index 76c5f58f7dc..08cba1ab942 100644
--- a/lib/soft386/soft386.c
+++ b/lib/soft386/soft386.c
@@ -270,4 +270,20 @@ Soft386ExecuteAt(PSOFT386_STATE State, USHORT Segment, ULONG Offset)
     State->InstPtr.Long = Offset;
 }
 
+VOID
+NTAPI
+Soft386SetStack(PSOFT386_STATE State, USHORT Segment, ULONG Offset)
+{
+    /* Load the new SS */
+    if (!Soft386LoadSegment(State, SOFT386_REG_SS, Segment))
+    {
+        /* An exception occurred, let the handler execute instead */
+        return;
+    }
+
+    /* Set the new SP */
+    State->GeneralRegs[SOFT386_REG_ESP].Long = Offset;
+}
+
+
 /* EOF */
diff --git a/subsystems/ntvdm/emulator.c b/subsystems/ntvdm/emulator.c
index c41d1c646ac..6fba6da5c1c 100644
--- a/subsystems/ntvdm/emulator.c
+++ b/subsystems/ntvdm/emulator.c
@@ -429,7 +429,7 @@ VOID EmulatorSetStack(WORD Segment, DWORD Offset)
     /* Call the softx86 API */
     softx86_set_stack_ptr(&EmulatorContext, Segment, Offset);
 #else
-    // TODO: NOT IMPLEMENTED
+    Soft386SetStack(&EmulatorContext, Segment, Offset);
 #endif
 }