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How to get correct pointer from 64-bit mov opcode bytes?

 
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thenibble
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PostPosted: Fri Feb 27, 2015 9:42 pm    Post subject: How to get correct pointer from 64-bit mov opcode bytes? Reply with quote

In 32 bit it was simple to look at the 4 bytes of a MOV opcode to identity the pointer in reverse, however in 64 bit it's more complicated. I can't seem to understand how to retrieve the correct address. Here is a picture for reference.



Can someone shed some light on this?
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Dark Byte
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PostPosted: Sat Feb 28, 2015 6:26 am    Post subject: Reply with quote

1412d49da+7+019fb4af=142ccfe90
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thenibble
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PostPosted: Sat Feb 28, 2015 6:52 am    Post subject: Reply with quote

Thank you for your help. I see it now.
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Dark Byte
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PostPosted: Sat Feb 28, 2015 6:56 am    Post subject: Reply with quote

edit: for the question if 7 is a constant

no, that 7 is the size of the instruction in bytes.
if it where to use eax, that rex prefix ( 48 ) would go away and be 6

for pointers it's usually 7 though

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