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import sys
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import sys
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import os
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import os
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import struct
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import struct
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def align_up(size, alignment):
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def align_up(size, alignment):
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    "Align upwards to a given alignment"
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    return (((size) + ((alignment) - 1)) & ~((alignment) - 1))
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    return (((size) + ((alignment) - 1)) & ~((alignment) - 1))
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def usage(prname):
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def usage(prname):
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    "Print usage syntax"
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    "Print usage syntax"
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    print prname + " <ALIGNMENT> <PATH> <IMAGE>"
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    print prname + " <ALIGNMENT> <PATH> <IMAGE>"