From owner-svn-src-head@freebsd.org Wed Oct 23 18:45:16 2019 Return-Path: Delivered-To: svn-src-head@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 3CE0615AFC0; Wed, 23 Oct 2019 18:45:16 +0000 (UTC) (envelope-from peter@rulingia.com) Received: from vtr.rulingia.com (vtr.rulingia.com [IPv6:2001:19f0:5801:ebe:5400:1ff:fe53:30fd]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "vtr.rulingia.com", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46yzp24938z4XM7; Wed, 23 Oct 2019 18:45:13 +0000 (UTC) (envelope-from peter@rulingia.com) Received: from server.rulingia.com (ppp239-208.static.internode.on.net [59.167.239.208]) by vtr.rulingia.com (8.15.2/8.15.2) with ESMTPS id x9NIiwlk027097 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 24 Oct 2019 05:45:03 +1100 (AEDT) (envelope-from peter@rulingia.com) X-Bogosity: Ham, spamicity=0.000000 Received: from server.rulingia.com (localhost.rulingia.com [127.0.0.1]) by server.rulingia.com (8.15.2/8.15.2) with ESMTPS id x9NIiqL5008843 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 24 Oct 2019 05:44:52 +1100 (AEDT) (envelope-from peter@server.rulingia.com) Received: (from peter@localhost) by server.rulingia.com (8.15.2/8.15.2/Submit) id x9NIiqhP008842; Thu, 24 Oct 2019 05:44:52 +1100 (AEDT) (envelope-from peter) Date: Thu, 24 Oct 2019 05:44:52 +1100 From: Peter Jeremy To: Andrew Turner Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r353640 - head/sys/kern Message-ID: <20191023184452.GA8725@server.rulingia.com> References: <201910161321.x9GDL2ee021543@repo.freebsd.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="PEIAKu/WMn1b1Hv9" Content-Disposition: inline In-Reply-To: <201910161321.x9GDL2ee021543@repo.freebsd.org> X-PGP-Key: http://www.rulingia.com/keys/peter.pgp User-Agent: Mutt/1.12.1 (2019-06-15) X-Rspamd-Queue-Id: 46yzp24938z4XM7 X-Spamd-Bar: ------- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of peter@rulingia.com designates 2001:19f0:5801:ebe:5400:1ff:fe53:30fd as permitted sender) smtp.mailfrom=peter@rulingia.com X-Spamd-Result: default: False [-7.67 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; R_SPF_ALLOW(-0.20)[+mx]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.20)[multipart/signed,text/plain]; DMARC_NA(0.00)[rulingia.com]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; TO_DN_SOME(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; IP_SCORE(-3.27)[ip: (-9.91), ipnet: 2001:19f0:5800::/38(-4.95), asn: 20473(-1.43), country: US(-0.05)]; SIGNED_PGP(-2.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; ASN(0.00)[asn:20473, ipnet:2001:19f0:5800::/38, country:US]; RCVD_TLS_ALL(0.00)[] X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Oct 2019 18:45:16 -0000 --PEIAKu/WMn1b1Hv9 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2019-Oct-16 13:21:02 +0000, Andrew Turner wrote: >Author: andrew >Date: Wed Oct 16 13:21:01 2019 >New Revision: 353640 >URL: https://svnweb.freebsd.org/changeset/base/353640 > >Log: > Stop leaking information from the kernel through timespec > =20 > The timespec struct holds a seconds value in a time_t and a nanoseconds > value in a long. On most architectures these are the same size, however > on 32-bit architectures other than i386 time_t is 8 bytes and long is > 4 bytes. > =20 > Most ABIs will then pad a struct holding an 8 byte and 4 byte value to > 16 bytes with 4 bytes of padding. When copying one of these structs the > compiler is free to copy the padding if it wishes. Are there any other structs passed from kernel to userland that include padding? --=20 Peter Jeremy --PEIAKu/WMn1b1Hv9 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEE7rKYbDBnHnTmXCJ+FqWXoOSiCzQFAl2wn59fFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEVF QjI5ODZDMzA2NzFFNzRFNjVDMjI3RTE2QTU5N0EwRTRBMjBCMzQACgkQFqWXoOSi CzT0aQ//XQLIKUlNQEau0wTr8TItxH/cVTV9Xnxr/V5x2U80JSP2GKa4DrFvCbfA 1bq63ofZgvfVogKUcLdCrT2nb84FrYgnIYCIAquwJkzum/UJfqtAxldeqQ+EFX3m B/vrv/JPmv48GhKzlERAAlu7eAN6z7PREl+Wgc4YDkOsp+D+wpF1TtafY8/WJFHn Vc3skMKN0AuDj3eRysgF7qARYN9JOYaMGXuoa9eO4n9X0yM5C+ypzv9n1ohWpWSZ LbLUxYwcXTdaprXggFQxoBBCayEdcSMBJO6502LMSceaUUTpxz7qFZZrDcWR4MPa ErEgp7JwK+En+MAzww8MXCMeFJN4oNuQd4JXd/3XYeG5NyHRa1mOdWAZe3b52VoQ RVMOVUu63tKLNkZNO/Tj5fg1SaaPfVf9WKtgeT8UROgHUXsNwkb2Y/dgUvlMbQbq YKO55xxTrQASKDxaW/Zo6gb3Nt8fuEd2f2aw5k98Kyg55ulMPzgi67FWYXwyd+Xk KCHsAGwcPhRqu/Dgk2Q81gWGUFuORGGuwu5uPoz64sZiDtDCblslHZzJvAIWegUc jGRv2VAbhwxxsEDucEyOKvAPACk1WfjyTN/DLso33S6gqrFK2qdYLl6iurGodhZX 5Z0c2k5FSUcYM9kF8ev4QfmVQb4HCEL5lDBL4qHRfvS9izZxKWo= =1fyl -----END PGP SIGNATURE----- --PEIAKu/WMn1b1Hv9--