wip on fork

minimal example works

kernel/memory/pagetable.cc

@@ -231,6 +231,8 @@ void copy_pagetable(four_lvl_paging_t* parent_table, four_lvl_paging_t* child_ta
                                 ((uintptr_t)i3<<30) |
                                 ((uintptr_t)i2<<21) |
                                 ((uintptr_t)i1<<12) ;
+                            if(vaddr < 0x4000000)
+                                continue;
                             if(!isMapped(vaddr, child_table)){
                                 //only copy if not part of basic pagetable
                                 assert( (i3>0) || (i2>=32)); //assert user memory