Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
To:	cygwin AT cygwin DOT com
From:	Shankar Unni <shankarunni AT netscape DOT net>
Subject:	Re: cygwin, libtool, dlpreopen, and .rdata
Date:	Thu, 23 Sep 2004 10:11:16 -0700
Lines:	21
Message-ID:	<civ04c$prm$1@sea.gmane.org>
References:	<41511C3F DOT 7080003 AT cwilson DOT fastmail DOT fm> <Pine DOT CYG DOT 4 DOT 58 DOT 0409221012570 DOT 2736 AT fordpc DOT vss DOT fsi DOT com> <cisbll$m8u$1 AT sea DOT gmane DOT org> <4151E85A DOT 5020305 AT cwilson DOT fastmail DOT fm>
Mime-Version:	1.0
X-Complaints-To:	usenet AT sea DOT gmane DOT org
X-Gmane-NNTP-Posting-Host:	ppp-67-124-90-144.dsl.pltn13.pacbell.net
User-Agent:	Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20040913 Thunderbird/0.8 Mnenhy/0.6.0.101
In-Reply-To:	<4151E85A.5020305@cwilson.fastmail.fm>
X-IsSubscribed:	yes

Charles Wilson wrote:

> Actually, *function* addresses are fine; they don't get relocated (at 
> least, not by the runtime-pseudo-reloc gobbledygook).  It's only the 
> addresses of DATA items exported by DLLs that get relocated in this way.
> 
> AND, they get relocated IF AND ONLY IF you are linking to a DLL.  

On x86/PE, anyway. The rules for other platforms and object-file formats 
vary.

Leaving this as "implementation-defined" (may or may not work - 
documented, but how easy is it to track down this documentation?) makes 
the programmer's task more difficult - they can never be sure where they 
can use 'const' on an initialized structure definition. What if function 
addresses are also 'bad' on some other platform?

Gcc should either warn about this usage, or it should silently "do the 
right thing" on each platform based on its capabilities.

But I'm just being picky, being an old compiler fart..


--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/

- Raw text -