From 624afd187cc40487894fba7e291dbc5e01ad137f Mon Sep 17 00:00:00 2001
From: Stefan Lankes <lankes@lfbs.rwth-aachen.de>
Date: Mon, 18 Apr 2011 15:05:27 +0200
Subject: [PATCH] by entering a system call, we need also to push the segment
 descriptor on the stack

---
 arch/x86/kernel/entry.asm | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/arch/x86/kernel/entry.asm b/arch/x86/kernel/entry.asm
index f24b33dd..1a325dba 100644
--- a/arch/x86/kernel/entry.asm
+++ b/arch/x86/kernel/entry.asm
@@ -145,7 +145,6 @@ global isr29
 global isr30
 global isr31
 global isrsyscall
-global jump_to_child
 
 ;  0: Divide By Zero Exception
 isr0:
@@ -433,6 +432,10 @@ extern syscall_handler
 
 ; used to realize system calls
 isrsyscall:
+    push ds
+    push fs
+    push gs
+    push es
     push ebp
     push edi
     push esi
@@ -449,17 +452,10 @@ isrsyscall:
     pop esi
     pop edi
     pop ebp
-    iret
-
-jump_to_child:
-    add esp, 4
-    mov eax, 0 ; child got always zero as return value
-    pop ebx
-    pop ecx
-    pop edx
-    pop esi
-    pop edi
-    pop ebp
+    pop es
+    pop gs
+    pop fs
+    pop ds
     iret
 
 global irq0