Date: Mon, 29 Jul 2013 22:00:03 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Warner Losh <imp@bsdimp.com> Cc: freebsd-arm <freebsd-arm@freebsd.org>, freebsd-wireless@freebsd.org, Hans Petter Selasky <hans.petter.selasky@bitfrost.no> Subject: Re: My WLI-UC-GNM up crash Message-ID: <20130729190003.GP4972@kib.kiev.ua> In-Reply-To: <3571E4A7-D153-448E-A234-302C9C5603E9@bsdimp.com> References: <cakrd9exvuqeqz=3ntmh7k3e4_6fjw9jph_tpfchujhqhwwbzsg@mail.gmail.com> <zarafa.51f6ad45.7961.536131947b8b1205@mail.lockless.no> <3571E4A7-D153-448E-A234-302C9C5603E9@bsdimp.com>
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[-- Attachment #1 --] On Mon, Jul 29, 2013 at 12:34:00PM -0600, Warner Losh wrote: > > On Jul 29, 2013, at 11:58 AM, Hans Petter Selasky wrote: > > > The aligned will make sure that the structure gets padded properly to the size specified. Only on ARM/MIPS etc, structures get automatically aligned according to the element in the structure requiring the greatest alignment. > > I'd turn this around and say only on x86 do structures not get aligned this way. On any riscy architecture, unaligned accesses are expensive, which is why the ABI there mandates this. > The alignment of the structure to the largest alignment of the member is required by the ABIs on i386 and amd64 as well. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.20 (FreeBSD) iQIcBAEBAgAGBQJR9ruyAAoJEJDCuSvBvK1B2OUQAKYEH7zcCVXK+9U4FBXwJHJc qvtKSL3WGoevcYmf3YWSJ0nlQahEv5eP+q5VHQXdoKykHzhhVhNuKAOSZ3Eyv6Lj Pr/05y0f6uiF9lrbDDjv7g2+dqBP+oWFkLl5bmRESyAaivEtDmn9ST3Xun+YUyEA Qqxg4ye/fU83juWIHPifY6VHp/BZ7TqSIn9HGWXu38Rdi7QkZFgXrWXmWrKJ+59X IvmUdT6UF0BxGiqnYrKRMxKEHYHeNbU+MgUL1r+6AuzT2yG8rMaONm1UADjvMm6d jq77QSc20W1sbm5pYv1ZnwUi3QgttywDJqIXOB8o4J04XUt6fybVnubCHr1PzrHL TKV038Zc5EUZBhfEZQDdUvrJf38VRNr2AFdjgqMRu//Wz9KPTCmvxKPLMsL+DEPL y+qXcY3VCyYtbnE5aJIg5bW1LvSAjbXVUzMFho0AZlChIrXxG0VBwR0guPVITzBu A6/XBAd6idMlz4Umg8QffXkaQv0rU23EZXoAo7J7IJsUqPb+Z04lC4S0/dohqFJW kvYvSHBc210d3ufmQoUY/5gpH4Be+cOgW4xnbLL73LkH+GhywyY4Cg+cbwuKd6kl QhW3rzFs7TTMn0a9hILTOxAmooDu3S93EqSQ4+lGTrHTD4TEdjDq/9PbXPsb6WP6 CQTfviFDirW97Cnp9Xx0 =Rrlz -----END PGP SIGNATURE-----help
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