Okay… This is all making sense. I understand everything that I have to do except… How do I decide the virtual address for the page? On May 23, 2012, at 11:02 PM, WALTER LITWINCZYK (RIT Student) wrote: > To follow up on the heap question: > > Processes don't really have a notion of heap right now. They're given the > bare minimum. So if you want to map something into a user process the easier > way is have a system call and then call __virt_map_page() to where you want > to map stuff and that should map it into whatever process called it. > > Otherwise if you want to map into another process from the current process > you'd have to search all the processes and then call > __virt_switch_page_directory() with the pcb->page_directory field of the pcb > you found and then do the mapping, don't forget to map back with > __virt_switch_page_directory(_current->page_directory) before you return > >