Rename some stuff - cleanup

src/kernel/boot/kmain.c

@@ -10,7 +10,7 @@
 
 void thread_function()
 {
-  int thread_id = get_tid();
+  int thread_id = current_thread()->tid;
 
   while(1)
   {

src/kernel/include/thread.h

@@ -32,6 +32,6 @@ struct thread_stack
 
 struct thread *new_thread(void (*function)(void));
 void yield();
-int get_tid();
+struct thread *current_thread();
 
-void swtch(void *, void *);
+void switch_stack(void *old_ptr, void *new_ptr);

src/kernel/proc/swtch.S

@@ -1,8 +1,8 @@
 .intel_syntax noprefix
 
-.global swtch
+.global switch_stack
 
-swtch:
+switch_stack:
   push rbp
   mov rbp, rsp
   push r15

src/kernel/proc/thread.c

@@ -1,7 +1,7 @@
 #include <thread.h>
 #include <scheduler.h>
 
-struct thread dummy;
+struct thread boot_thread;
 struct thread *_current_thread = 0;
 
 uint64_t next_tid = 1;
@@ -11,6 +11,7 @@ struct thread *new_thread(void (*function)(void))
   struct thread *th = &stk->tcb;
 
   th->tid = next_tid++;
+
   stk->RBP = (uint64_t)&stk->RBP2;
   stk->ret = (uint64_t)function;
   th->stack_ptr = (uint64_t)&stk->RBP;
@@ -31,7 +32,7 @@ void set_current_thread(struct thread *th)
 void switch_thread(struct thread *old, struct thread *new)
 {
   set_current_thread(new);
-  swtch(&old->stack_ptr, &new->stack_ptr);
+  switch_stack(&old->stack_ptr, &new->stack_ptr);
 }
 
 void yield()
@@ -42,13 +43,8 @@ void yield()
   if(old)
     ready(old);
   else
-    old = &dummy;
+    old = &boot_thread;
   while(!(new = scheduler_next()));
 
   switch_thread(old, new);
 }
-
-int get_tid()
-{
-  return current_thread()->tid;
-}