Function active_level_1_table_containing

kernel/src/memory.rs:788–803

(
    addr: VirtAddr
)

}

fn active_level_1_table_containing(
    addr: VirtAddr
) -> &'static mut PageTable {
    let memory_info = unsafe {MEMORY_INFO.as_mut().unwrap()};
    let mut table = unsafe{&mut (*active_pagetable_ptr())};

    for index in [addr.p4_index(),
                  addr.p3_index(),
                  addr.p2_index()] {

        let entry = &mut table[index];
        table = unsafe {&mut *(memory_info.physical_memory_offset
                               + entry.addr().as_u64()).as_mut_ptr()};
    }
    table
}

/// Allocate a read-only page which user code
/// has attempted to write to.