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On ia64 alignment requirements are strict. When we pass a pointer to UUID it needs to be at least 4-byte aligned or EFI will crash. On the other hand in device path there is no padding for UUID, so we need 2 types in one formor another. Make 4-byte aligned and unaligned types The code is structured in a way to accept unaligned inputs in most cases and supply 4-byte aligned outputs. Efiemu case is a bit ugly because there inputs and outputs are reversed and so we need careful casts to account for this inversion. Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>