Date: Wed, 4 Nov 2009 19:34:34 +0100 From: Ed Schouten <ed@80386.nl> To: Alan Cox <alc@cs.rice.edu> Cc: alc@freebsd.org, freebsd-hackers@freebsd.org, Alexander Best <alexbestms@math.uni-muenster.de> Subject: Re: mmap(2) with MAP_ANON honouring offset although it shouldn't Message-ID: <20091104183434.GB1293@hoeg.nl> In-Reply-To: <4AF1C707.6000706@cs.rice.edu> References: <permail-200910211551041e86ffa80000182a-a_best01@message-id.uni-muenster.de> <ca3526250910211051v2fef55e7yda262a58df200751@mail.gmail.com> <20091103172452.GU1293@hoeg.nl> <200911040812.18712.jhb@freebsd.org> <20091104162646.GZ1293@hoeg.nl> <4AF1C707.6000706@cs.rice.edu>
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--+31Goo6fsQAntfNs Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable * Alan Cox <alc@cs.rice.edu> wrote: > For what it's worth, I believe that Solaris does the exact opposite. > They provide MAP_ANONYMOUS for compatibility. It seems like a good > idea for us to do the same. Something like this? Index: mman.h =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --- mman.h (revision 198919) +++ mman.h (working copy) @@ -82,6 +82,9 @@ */ #define MAP_FILE 0x0000 /* map from file (default) */ #define MAP_ANON 0x1000 /* allocated from memory, swap spac= e */ +#ifndef _KERNEL +#define MAP_ANONYMOUS MAP_ANON /* For compatibility. */ +#endif /* !_KERNEL */ =20 /* * Extended flags --=20 Ed Schouten <ed@80386.nl> WWW: http://80386.nl/ --+31Goo6fsQAntfNs Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAkrxyToACgkQ52SDGA2eCwXB0QCfer7jg+fLcYA3wy0j1oTkTK5k EeAAn0jJHNJf+/wfrm+RlKqzZ9+9vtY4 =kWRu -----END PGP SIGNATURE----- --+31Goo6fsQAntfNs--
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