de-inline debug_init from main

kernel/debug.asm

@@ -1,3 +1,13 @@
+debug_init:
+  push bx
+  push dx
+  mov bx, 0x002E
+  mov dx, debug_reg_ir
+  call ivt_set
+  pop dx
+  pop bx
+  ret
+
 ; this kprints registers
 ; expect to be called as interrupt routine
 debug_reg_ir:

kernel/main.asm

@@ -1,19 +1,13 @@
 main:
   mov ax, cs
   mov ds, ax
-  mov es, ax
-
-  mov bx, 0x002E
-  mov dx, debug_reg_ir
-
-  call ivt_set
 
+  call debug_init
   call heap_init
+
   mov ax, 18
   call malloc
 
-  int 0x2E
-
 .endloop:
   hlt
   jmp .endloop