From cda6948e7f9efb54e4ff7405dfa977fba686a16b Mon Sep 17 00:00:00 2001
From: neil <neil@fb15a70f-31f2-0310-bbcc-cdcc74a49acc>
Date: Wed, 21 Mar 2012 18:18:53 +0000
Subject: [PATCH] Disable optimisation for NewStackSwap(): pc-i386 boots again.

git-svn-id: https://svn.aros.org/svn/aros/trunk/AROS@44440 fb15a70f-31f2-0310-bbcc-cdcc74a49acc
---
 arch/i386-all/exec/mmakefile.src  | 1 +
 arch/i386-all/exec/newstackswap.c | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/i386-all/exec/mmakefile.src b/arch/i386-all/exec/mmakefile.src
index 59819d7bc3..d9528a7bc9 100644
--- a/arch/i386-all/exec/mmakefile.src
+++ b/arch/i386-all/exec/mmakefile.src
@@ -4,6 +4,7 @@ include $(TOP)/config/make.cfg
 FILES  := alert_cpu cpu_init newstackswap preparecontext
 AFILES := execstubs stackswap copymem_SSE
 
+USER_CFLAGS   := -O0
 USER_AFLAGS   := -I$(GENINCDIR)
 USER_INCLUDES := $(PRIV_EXEC_INCLUDES)
 
diff --git a/arch/i386-all/exec/newstackswap.c b/arch/i386-all/exec/newstackswap.c
index ef65283d05..8a07d0e520 100644
--- a/arch/i386-all/exec/newstackswap.c
+++ b/arch/i386-all/exec/newstackswap.c
@@ -1,5 +1,5 @@
 /*
-    Copyright © 1995-2011, The AROS Development Team. All rights reserved.
+    Copyright © 1995-2012, The AROS Development Team. All rights reserved.
     $Id$
 
     Desc: NewStackSwap() - Call a function with swapped stack.
@@ -37,7 +37,7 @@ AROS_LH3(IPTR, NewStackSwap,
 
     if (t->tc_Flags & TF_STACKCHK)
     {
-    	UBYTE* startfill = sss->stk_Lower;
+    	volatile UBYTE* startfill = sss->stk_Lower;
 
     	while (startfill < (UBYTE *)sp)
 	    *startfill++ = 0xE1;
-- 
2.11.4.GIT