From 0e6844e2fa8ae091d6cb5f6b3ab967ae5adfe83b Mon Sep 17 00:00:00 2001
From: Rafal Kupiec <belliash@codingworkshop.eu.org>
Date: Sun, 26 Nov 2023 14:14:54 +0100
Subject: [PATCH] Fix page fault on accessing initial thread frame

---
 xtoskrnl/ke/i686/kthread.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xtoskrnl/ke/i686/kthread.c b/xtoskrnl/ke/i686/kthread.c
index 77bd8d5..c7109c1 100644
--- a/xtoskrnl/ke/i686/kthread.c
+++ b/xtoskrnl/ke/i686/kthread.c
@@ -43,7 +43,7 @@ KepInitializeThreadContext(IN PKTHREAD Thread,
     PFX_SAVE_FORMAT FxSaveFormat;
 
     /* Set initial thread frame */
-    ThreadFrame = ((PKTHREAD_INIT_FRAME)Thread->InitialStack) - sizeof(KTHREAD_INIT_FRAME);
+    ThreadFrame = (PKTHREAD_INIT_FRAME)(Thread->InitialStack - sizeof(KTHREAD_INIT_FRAME));
 
     /* Fill floating point save area with zeroes */
     RtlZeroMemory(&ThreadFrame->NpxFrame, sizeof(FX_SAVE_AREA));