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Date: Sat, 28 Feb 2009 21:28:50 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
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Subject: Re: [1.7] rebaseall doesn't solve the problem
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On Feb 28 14:51, Christopher Faylor wrote:
> On Sat, Feb 28, 2009 at 01:47:16PM -0500, Charles Wilson wrote:
> >Corinna Vinschen wrote:
> >> If so, I'm wondering if setting the TS-aware flag shouldn't become
> >> default in GCC.  What do you say, Dave?  Would that be possible?
> >
> >I'd probably wait on that for the /next/ release (e.g. after 4.3.2-2),
> >[...]
> >Maybe the aslr functionality is different enough -- and useful in enough
> >contexts that differ from rebasing -- that instead of incorporating
> >'call aslr TOO' into rebaseall, there should be a separate 'aslrall' script?
> 
> It should be trivial to add this to binutils.  Doesn't it ultimately
> belong in ld and (maybe) objcopy?

Yes, that should be done in ld.

> I can add this now but I don't think it should be the default just yet.

If the TS-aware flag actually helps to avoid the tsappcmp.dll bug, then
I think the flag should be set by ld by default for Cygwin apps.

> >That would be nice.  However, ONLY exe's linked with cygwin1.dll should
> >be marked this way, right?  Not cygcheck, strace, and whatever other few
> >exes we might find in the cygwin installation lists.
> 
> Do the exes themselves need this bit as well as the dlls?

Only exes require the TS-aware bit.  Two interesting snippets from MSDN:

http://msdn.microsoft.com/en-us/library/cc834995(VS.85).aspx
http://msdn.microsoft.com/en-us/library/01cfys9z.aspx

The first one actually explains that the overhead of loading a
compatibility DLL can be avoided by using the TS-aware flag.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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