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From: "Ralf Habacker" <Ralf DOT Habacker AT freenet DOT de>
To: "Cygwin" <cygwin AT sources DOT redhat DOT com>
Subject: RE: rebase addon - Bas and Size listing of dll's without rebasing
Date: Fri, 28 Dec 2001 12:50:07 +0100
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In-Reply-To: <20011227180503.GD2204@dothill.com>

> -----Original Message-----
> From: Jason Tishler [mailto:jason AT tishler DOT net]
> Sent: Thursday, December 27, 2001 7:05 PM
> To: Ralf Habacker
> Cc: Cygwin
> Subject: Re: rebase addon - Bas and Size listing of dll's without
> rebasing
>
>
> Ralf,
>
> On Wed, Dec 26, 2001 at 09:08:49PM +0100, Ralf Habacker wrote:
> > On analysing this problem I added an option "-l" to the rebase tool to
> > list dll's imagebase and -size without rebasing. It's very interesting
> > to see how MS chooses there Imagebase.
>
> What about the following alternative solution:
>
>     $ objdump -p foo.dll | egrep '(ImageBase|SizeOfImage)'
>     ImageBase               68000000
>     SizeOfImage             0003f000

Try it with a recent objdump and a dll with auto-import variables and you will see that
objdump crashes. :-(

>
> > Because I hacked this very quick, I have used simple FILE structure
> > and fopen/fread calls.  Perhaps someone like to change this to iostream
> > functionality.
>
> At this point, my priorities are:
>
>     1. attempt to contribute rebase to binutils
>     2. work on the integration with setup.exe
>
> After the above is completed, then I would entertain adding such an
> option if the community deemed it appropriate.  But, wouldn't
> implementing it via ReBaseImage()'s fReBase parameter as opposed to
> plucking certain bytes out of the executable be a better approach?  I
> presume that this is how MS implements their '-s' (just sum image range)
> option.

I have done this, because I doesn't know any other way to do this, especially because of the
objdump bug.
There may be better solutions for this.

Ralf


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