From c15925a24efe14f437d8a2699500241a58fdc8f9 Mon Sep 17 00:00:00 2001
From: Miguel <m.i@gmx.at>
Date: Fri, 17 Aug 2018 21:41:21 +0200
Subject: cleanup and working on fifo pipes

---
 asm/usermode.s | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

(limited to 'asm/usermode.s')

diff --git a/asm/usermode.s b/asm/usermode.s
index acf4b04..67eca04 100644
--- a/asm/usermode.s
+++ b/asm/usermode.s
@@ -1,8 +1,9 @@
-.global asm_usermode
-.extern userfunc
+.global usermode
 
-# pass address to func to exec (TODO)
-asm_usermode:
+usermode:
+
+	mov 0x4(%esp),%edx    //get adress of passed : void func()
+			      //to be called in ring 3
 
 	// 0x23 is user data segment (|2 low bits)
 	// 0x1b is user code segment (|2 low bits)
@@ -13,6 +14,7 @@ asm_usermode:
         mov %ax, %es
         mov %ax, %fs
         mov %ax, %gs
+
 	// ss is handled by iret
                  
         mov %esp, %eax
@@ -25,10 +27,11 @@ asm_usermode:
         //mov $0x200, %eax
 	//push %eax	    // eflags image
         pushl $0x1B	    // return code segment selector
-        push $userfunc	    // return instruction pointer
+        push %edx	   // return instruction pointer
+
         iret
 
-	jmp . // will never be reached?
+	jmp . // never to be reached
 
 
  
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