From e77a16e07a595de7eafa55e7fb95a1376c9827a1 Mon Sep 17 00:00:00 2001
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Fri, 22 Feb 2008 21:16:36 -0800
Subject: Make sure we don't use any upper-memory stack during shuffle

We want to make sure everything stays below 7C00h during the
shuffle_and_boot operation.
---
 bootsect.inc | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'bootsect.inc')

diff --git a/bootsect.inc b/bootsect.inc
index c1c850c8..afb458e3 100644
--- a/bootsect.inc
+++ b/bootsect.inc
@@ -153,6 +153,10 @@ replace_bootstrap:
 		pop bx			; Copy from...
 		pop ax			; Copy list count
 
+		; Make extra sure we don't continue to use any stack
+		; in high memory.
+		mov dword [PMESP],StackTop
+
 		cli
 		mov cx,es
 		mov ss,cx
-- 
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