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Knowing how many bytes to read

 
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iPromise
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Joined: 27 Jun 2009
Posts: 529
Location: Canada
PostPosted: Sun Jan 09, 2011 8:58 pm    Post subject: Knowing how many bytes to read Reply with quote
Some addresses in a memory region may have the following inline assembly code:

Code:

pushad


Which pushes all the registers to the stack. The hexadecimal number that represents that instruction respectivily is:

Code:

60


Which only contains a byte of memory.

In contrast, we may have an address in the target's memory which contains the following inline assembly code:

Code:

add [eax], al


And the following hexadecimal number which represents those operation codes is:

Code:

00 00


Which contains two bytes of memory.

My question now is how do I find out how many bytes to read while reading the address to know:

1. How long bytes it contains
2. ASM inline code
3. Hexadecimal numerals

Regards,

iPromise
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hcavolsdsadgadsg
I'm a spammer
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Joined: 11 Jun 2007
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PostPosted: Sun Jan 09, 2011 10:14 pm    Post subject: Reply with quote
just use one topic, easier to keep track of
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NoMercy
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PostPosted: Mon Jan 10, 2011 11:00 am    Post subject: Reply with quote
I ased this questions 1 week ago, maybe you should try to search:)
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