userspace and kernelspace taskswitching

1 files changed, 17 insertions, 6 deletions

diff --git a/kernel/usermode.c b/kernel/usermode.c
index 81dc5c1..bb614d0 100644
--- a/kernel/usermode.c
+++ b/kernel/usermode.c
@@ -15,6 +15,9 @@
 //https://wiki.osdev.org/Task_State_Segment
 tss_struct sys_tss; //Define the TSS as a global structure
 
+static volatile uint32_t c1;
+static volatile uint32_t c2;
+
 void install_tss(int cpu_no){
 
     // now fill each value
@@ -28,20 +31,28 @@ void install_tss(int cpu_no){
 
 void userfunc()
 {
+
     // we need enable here again (since the pushed eflags have it disabled)!
     x86_sti(); 
 
     // if we are pid 0, replace ourselves with /bin/init TODO: switch to usermode before!
-    if(task_get_current_pid()==0)syscall(SYSCALL_EXECVE,BIN_INIT,NULL,NULL); 
+    if(task_get_current_pid()==0)
+    {
+	//usermode(&initfunc); 
+	while(1)
+	{
+	   c2++;
+	}
+    }
 
-    // kernel worker thread
+    // kernel worker thread on pid1
     if(task_get_current_pid()==1)
     {
+	while(1)
+	{
+	    c1++;
+	}
     }
 }
 
-void switch_to_user_mode() 
-{
-    usermode(&userfunc); 
-}