From: leslie.polzer@gmx.net
To: A D <a_d_249@hotmail.com>
Cc: linux-assembly@vger.kernel.org
Subject: Re: Question regarding EIP instruction pointer
Date: Fri, 30 Mar 2007 15:58:23 +0200 [thread overview]
Message-ID: <20070330135823.GA5129@wintermute.farpoint> (raw)
In-Reply-To: <BAY133-F35089BE38C90DC5E52C15CF5630@phx.gbl>
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On Fri, Mar 30, 2007 at 09:38:41AM -0400, A D wrote:
> I know that EIP register is the instruction pointer. But how does it
> know how many bytes it needs to increment to the next instruction?
In order to execute the current instruction, the CPU must determine its
format, which also means finding out how many bytes the command takes.
Next command is at eip+sizeof(command). Of course, this only holds for
subsequent execution, branching is another thing.
Leslie
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next prev parent reply other threads:[~2007-03-30 13:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-30 13:38 Question regarding EIP instruction pointer A D
2007-03-30 13:58 ` leslie.polzer [this message]
2007-03-30 14:29 ` A D
2007-03-30 16:14 ` Robert Plantz
2007-03-30 17:55 ` Brian Raiter
[not found] <873AB473-8332-49C7-9612-FF6357FCD5CD@ticino.com>
2007-03-31 3:24 ` A D
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