Date: Wed, 4 Nov 2009 08:12:18 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-hackers@freebsd.org Cc: alc@freebsd.org, Ed Schouten <ed@80386.nl>, Alexander Best <alexbestms@math.uni-muenster.de> Subject: Re: mmap(2) with MAP_ANON honouring offset although it shouldn't Message-ID: <200911040812.18712.jhb@freebsd.org> In-Reply-To: <20091103172452.GU1293@hoeg.nl> References: <permail-200910211551041e86ffa80000182a-a_best01@message-id.uni-muenster.de> <ca3526250910211051v2fef55e7yda262a58df200751@mail.gmail.com> <20091103172452.GU1293@hoeg.nl>
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On Tuesday 03 November 2009 12:24:52 pm Ed Schouten wrote: > Hi Alan, > > * Alan Cox <alan.l.cox@gmail.com> wrote: > > The standards for mmap(2) actually disallow values of "off" that are not a > > multiple of the page size. > > > > See http://www.opengroup.org/onlinepubs/000095399/functions/mmap.html for > > the following: > > <snip> > > Just by accident I saw they changed that behaviour in a newer version of > the spec: > > http://www.opengroup.org/onlinepubs/9699919799/functions/mmap.html Note that the spec doesn't cover MAP_ANON at all FWIW. -- John Baldwin
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