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Message-ID: <436B65CC.8010705@byu.net>
Date: Fri, 04 Nov 2005 06:44:44 -0700
From: Eric Blake <ebb9 AT byu DOT net>
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To: cygwin AT cygwin DOT com
Subject: Re: BUG: Binutils strip corrupts dll files when using cygwin 1.5.18  and latest snapshot (20051103)
References: <F5D40D7C-1285-49BA-ADA0-4A93ABD63982 AT rehley DOT net> <20051104015144 DOT GI17650 AT trixie DOT casa DOT cgf DOT cx> <436B5771 DOT 1070202 AT byu DOT net> <20051104131115 DOT GA2858 AT calimero DOT vinschen DOT de>
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According to Corinna Vinschen on 11/4/2005 6:11 AM:
> 
> The problem is that there's one section in the file, .gnu_debuglink,
> which is defined as a debugging section.  strip's job is to remove all
> debug sections.  This is usually a simple job to do since the debug
> sections are typically at the end of the file anyway.  Not so the
> .gnu_debuglink section.  By stripping this out, strip generates an
> invalid PE/COFF file since it leaves an undefined memory hole in the
> address space of the file, which is a no-no with the somewhat overly
> simple Windows runtime loader.

Wow.  Learn something every day.  No wonder ELF is so much more popular in
the open source community.

> 
> It's an unlucky case.  You could argue that strip should know better
> than to remove debug sections from the middle of a PE/COFF file but
> OTOH the Cygwin DLL is a very special case.

So the cygwin DLL is likely to be the only PE/COFF dll that strip ever
encounters with a section marked as debug in the middle of a file?  If it
is ever expected that other DLLs will have the same property, then yes,
strip should be taught to not strip intermediate debug sections; but if it
is just cygwin1.dll, I can live with the rule of thumb of "don't do it if
it hurts".

- --
Life is short - so eat dessert first!

Eric Blake             ebb9 AT byu DOT net
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