From e00249b958731489bcf119f6b1b44cacbd592533 Mon Sep 17 00:00:00 2001
From: "Chloe M." <chloe@mensia.org>
Date: Wed, 15 Jul 2026 20:48:08 +0000
Subject: [PATCH] ptos/amd64: context: Assign NextTcb before usage

Signed-off-by: Chloe M. <chloe@mensia.org>
---
 service/ptos/arch/amd64/ps/context.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/service/ptos/arch/amd64/ps/context.c b/service/ptos/arch/amd64/ps/context.c
index fed871d..f6bb9a7 100644
--- a/service/ptos/arch/amd64/ps/context.c
+++ b/service/ptos/arch/amd64/ps/context.c
@@ -59,6 +59,7 @@ HalContextSwitch(TRAP_FRAME *Frame)
     HalMmuWriteVas(&NextParent->Vas);
 
     /* Update the task state segment with kstack */
+    NextTcb = &NextThread->Tcb;
     if (ISSET(NextParent->Flags, PS_USER)) {
         KStackTop = NextTcb->KStackBase + NextTcb->KStackLength;
         Tss = Mcb->Tss;
@@ -68,7 +69,6 @@ HalContextSwitch(TRAP_FRAME *Frame)
 
     /* Context switch here */
     Kpcr->CurrentThread = NextThread;
-    NextTcb = &NextThread->Tcb;
     RtlMemCpy(Frame, &NextTcb->FrameSnapshot, sizeof(*Frame));
     HalPrimeThreadTimer(SCHED_MIN_QUANTUM);
 }