Function cpp_vm_cow_pages_add_new_pages_locked 

pub unsafe extern "C" fn cpp_vm_cow_pages_add_new_pages_locked(
    cow: *mut VmCowPages,
    start_offset: u64,
    pages: *mut VmPageDoublyLinkedList,
    overwrite: VmCowPages_CanOverwriteSlot,
    zero: bool,
    deferred: *mut VmCowPages_DeferredOps,
) -> zx_status_t