From 102b357a756be359299c9fcb72980416f9c99e7a Mon Sep 17 00:00:00 2001
From: Aiken Harris <harraiken91@gmail.com>
Date: Fri, 22 May 2026 18:42:41 +0200
Subject: [PATCH] Simplify thread frame setup using pointer arithmetic

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

diff --git a/xtoskrnl/ke/i686/kthread.cc b/xtoskrnl/ke/i686/kthread.cc
index efae4f6..b4a924c 100644
--- a/xtoskrnl/ke/i686/kthread.cc
+++ b/xtoskrnl/ke/i686/kthread.cc
@@ -43,7 +43,7 @@ KE::KThread::InitializeThreadContext(IN PKTHREAD Thread,
     PFX_SAVE_FORMAT FxSaveFormat;
 
     /* Set initial thread frame */
-    ThreadFrame = (PKTHREAD_INIT_FRAME)((ULONG_PTR)Thread->InitialStack - sizeof(KTHREAD_INIT_FRAME));
+    ThreadFrame = ((PKTHREAD_INIT_FRAME)Thread->InitialStack) - 1;
 
     /* Fill floating point save area with zeroes */
     RTL::Memory::ZeroMemory(&ThreadFrame->NpxFrame, sizeof(FX_SAVE_AREA));