From da62d2a7efc756870143ecda6566b0bea91b817f Mon Sep 17 00:00:00 2001
From: Michal Idziorek <m.i@gmx.at>
Date: Sat, 16 May 2015 04:07:34 +0200
Subject: fix tss esp0

---
 kernel/usermode.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'kernel/usermode.c')

diff --git a/kernel/usermode.c b/kernel/usermode.c
index 339045d..76128d1 100644
--- a/kernel/usermode.c
+++ b/kernel/usermode.c
@@ -5,7 +5,7 @@
 
 
 tss_struct sys_tss; //Define the TSS as a global structure
-
+extern uint32_t stack_top[];
 
 // generic syscall interface!
 int syscall(int call, int p1, int p2, int p3)
@@ -46,7 +46,7 @@ void install_tss(int cpu_no){
     // now fill each value
     // set values necessary
     sys_tss.ss0 = 0x10; //kernel data
-    sys_tss.esp0 = 0x9000; //kernel stack
+    sys_tss.esp0 = stack_top; //kernel stack just under the kernel
 
     // now set the IO bitmap (not necessary, so set above limit)       
     // sys_tss.iomap = ( unsigned short ) sizeof( tss_struct ); 
-- 
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