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Date: Wed, 12 Mar 2008 17:23:02 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Bug: C-prog from Win dies in fork; gdb.exe also won't run
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On Mar 12 16:13, Dave Korn wrote:
> Brian Dessent wrote on 12 March 2008 15:59:
> > Dave Korn wrote:
> > >   Now, who supposes you could work around the restriction by writing
> > > 
> > >   * (WORD *) 0x004000dc = POSIX_CUI;
> > > 
> > > just before calling NtSetInformation?
> > 
> > How are you going to fool the executive by poking around in the PE
> > header from userspace long after the process has initialized?  The
> > executive fundamentally knows which subsystem any given process is
> > running in because it created it and manages the low level process
> > table.  
> 
>   This is not just any code - this is MS code.
> 
>   Given that, it's therefore going to have been done as quickly and cheaply
> as possible, so why should we assume they wouldn't they just check the value
> in the PE header at the start of NtSetInformationProcess?

Is that just an assumption or do you know that this would work?


Corinna

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

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