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Author Topic: times 512 -($-$$) db 0  (Read 13755 times)

Offline bitbit

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times 512 -($-$$) db 0
« on: March 06, 2011, 02:24:10 PM »
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times 512 -($-$$) db 0What does $ and $$ stand for?
What says the argument 512 -($-$$) of times in this context?


bitbit
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Offline Frank Kotler

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Re: times 512 -($-$$) db 0
« Reply #1 on: March 06, 2011, 03:26:50 PM »
'$' is roughly "here" (in this context). '$$' is "beginning of section". So "$-$$" is an expression that calculates the length of your code, so far. So your code gets padded out to 512 bytes.

Best,
Frank

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Offline Keith Kanios

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Re: times 512 -($-$$) db 0
« Reply #2 on: March 06, 2011, 09:18:09 PM »
It's all explained in the NASM Documentation.
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