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Date: Thu, 19 Sep 2002 09:32:39 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: "Cygwin AT Cygwin. Com" <cygwin AT cygwin DOT com>
Subject: Re: MMap offset parameter failing with ENOMEM error
Message-ID: <20020919093239.H29920@cygbert.vinschen.de>
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On Thu, Sep 19, 2002 at 12:19:06PM +1000, Shane Mann wrote:
> Hi,
> 
> I am having trouble with mmap using the last 'offset' parameter. I have
> attached a small piece of code (and sample file) which demonstrates the
> problem. Basically if the offset parameter is passed as a variable to mmap
> then the call fails with an ENOMEM error. But if you pass 0 as the parameter
> and then access the return address from mmap + offset - it is fine. My
> question: is mmap handling the offset parameter correctly?
> 
> Usage for the program:
> 
> ./a.exe <offset> <file> eg: ./a.exe 11200 index.idx
> 
> To see the address + offset work, comment out the first mmap call and return
> statement and uncomment the lines below each one.
> 
> Any help appreciated.

Your application tries to mmap over EOF.

Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

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