From: Jie Zhang <jie@codesourcery.com>
To: Mike Frysinger <vapier.adi@gmail.com>
Cc: Paul Mundt <lethal@linux-sh.org>,
Mike Frysinger <vapier@gentoo.org>,
uclinux-dev@uclinux.org, David Howells <dhowells@redhat.com>,
David McCullough <davidm@snapgear.com>,
Greg Ungerer <gerg@uclinux.org>,
uclinux-dist-devel@blackfin.uclinux.org,
microblaze-uclinux@itee.uq.edu.au,
Michal Simek <monstr@monstr.eu>,
linux-m32r@ml.linux-m32r.org,
Hirokazu Takata <takata@linux-m32r.org>,
linux-kernel@vger.kernel.org,
Yoshinori Sato <ysato@users.sourceforge.jp>
Subject: Re: [PATCH] FLAT: allow arches to declare a larger alignment than the slab
Date: Wed, 26 May 2010 10:23:19 +0800 [thread overview]
Message-ID: <4BFC8617.9010501@codesourcery.com> (raw)
In-Reply-To: <AANLkTinTbJ3yu9ElO32rnavnGwCrsItdDCl58KoeEW3j@mail.gmail.com>
On 05/26/2010 07:17 AM, Mike Frysinger wrote:
> i do not believe that is the reason for this, but unfortunately Jie is
> about the only one atm who knows the inner details as for why shared
> FLAT libraries requires 0x20 rather than just 0x4 alignment. i do
> know that there are some gcc fortran tests that fail otherwise.
> hopefully he can remember details ;).
>
I encountered this issue when investigating some GCC test failures when
using FLAT. I don't remember if they were in GCC Fortran testsuite. Some
variables in those test cases were required to be aligned at a large
boundary, for example 16-byte. I found 0x20 was a reasonably large
alignment to fix all such failures in GCC testsuite.
Jie
next prev parent reply other threads:[~2010-05-26 2:23 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-25 19:24 [PATCH] FLAT: allow arches to declare a larger alignment than the slab Mike Frysinger
2010-05-25 19:50 ` Geert Uytterhoeven
2010-05-25 21:07 ` Paul Mundt
2010-05-25 23:17 ` Mike Frysinger
2010-05-26 2:23 ` Jie Zhang [this message]
2010-05-26 6:59 ` Geert Uytterhoeven
2010-05-26 7:23 ` Mike Frysinger
2010-05-26 7:33 ` Paul Mundt
2010-05-26 7:36 ` Mike Frysinger
2010-05-26 7:36 ` Mike Frysinger
2010-05-26 7:48 ` Paul Mundt
2010-05-26 8:01 ` Mike Frysinger
2010-05-26 7:24 ` Michal Simek
2010-05-26 8:45 ` [PATCH 1/2 v2] FLAT: split the stack & data alignments Mike Frysinger
2010-05-27 8:24 ` Michal Simek
2010-05-27 18:30 ` [Uclinux-dist-devel] " Mike Frysinger
2010-05-27 23:15 ` [microblaze-uclinux] " David McCullough
2010-05-28 4:57 ` Mike Frysinger
2010-05-28 6:05 ` Mike Frysinger
2010-05-28 6:23 ` David McCullough
2010-05-28 6:40 ` Greg Ungerer
2010-05-26 8:45 ` [PATCH 2/2 v2] FLAT: tweak default stack alignment Mike Frysinger
2010-05-28 6:24 ` David McCullough
2010-05-28 6:39 ` Greg Ungerer
2010-06-06 7:12 ` [PATCH v3] " Mike Frysinger
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