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Programming > Assembly x86 > Re: Identifying...
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Re: Identifying I/O related instructions

by NoSpam@[EMAIL PROTECTED] (Bob Masta) Mar 2, 2008 at 02:10 PM

On Sat, 1 Mar 2008 17:14:16 -0800 (PST), tony  <spamtrap@[EMAIL PROTECTED]
>
wrote:

>> Outside of the OS and without a hot run debugger you may figure out
>> (by disassembling) an address-range above 3.GB to be memory-mapped I/O,
>> but you also see this in the PCI config of any device.
>> Only very old addon cards had mem-I/O at low addresses.
>
>Is it possible to figure out statically that whether the target
>address of the operand is above or below 3GB, without hot run debugger
>(given that operands can be addressed in several different ways)?
>i.e. we can infer the target address if immediate addressing mode is
>used, but in all other cases (addressing modes) how can we compute the
>target address without hot run?
>

If I understand your question, you want to know if things like

	mov eax,[4 * ebx + esi]

will be in a certain range.  There is no magic:  You either have to 
have a hot-run debugger or wade through the disassembly by
hand and keep track of every value.

Best regards,



Bob Masta
 
              DAQARTA  v3.50
   Data AcQuisition And Real-Time Analysis
             www.daqarta.com
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 7 Posts in Topic:
Identifying I/O related instructions
tony <spamtrap@[EMAIL  2008-02-29 16:23:25 
Re: [Clax86list] Identifying I/O related instructions
Charles Crayne <spamt  2008-02-29 16:46:12 
Re: Identifying I/O related instructions
tony <spamtrap@[EMAIL  2008-02-29 22:34:20 
Re: Identifying I/O related instructions
"Wolfgang Kern"  2008-03-01 13:02:07 
Re: Identifying I/O related instructions
tony <spamtrap@[EMAIL  2008-03-01 17:14:16 
Re: Identifying I/O related instructions
"Wolfgang Kern"  2008-03-02 11:07:06 
Re: Identifying I/O related instructions
NoSpam@[EMAIL PROTECTED]   2008-03-02 14:10:32 

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tan12V112 Thu Nov 20 20:51:48 CST 2008.