Function zx_pager_query_dirty_ranges 

pub unsafe extern "C" fn zx_pager_query_dirty_ranges(
    pager: u32,
    pager_vmo: u32,
    offset: u64,
    length: u64,
    buffer: *mut u8,
    buffer_size: usize,
    actual: *mut usize,
    avail: *mut usize,
) -> i32