From: "PaX Team" <pageexec@freemail.hu>
To: x86@kernel.org
Cc: llvmlinux@lists.linuxfoundation.org, linux-kernel@vger.kernel.org
Subject: Re: [llvmlinux] [PATCH 4/4] x86, boot: Work around clang PR18415.
Date: Wed, 08 Jan 2014 13:04:51 +0100 [thread overview]
Message-ID: <52CD3EE3.6295.92E23548@pageexec.freemail.hu> (raw)
In-Reply-To: <1389180083-23249-4-git-send-email-David.Woodhouse@intel.com>
On 8 Jan 2014 at 11:21, David Woodhouse wrote:
> Clang's intrinsics ignore -mregparm=3 when they fall back to calling the
> out-of-line implementations. Putting the args on the stack when memcpy()
> expects them in registers is not a recipe for a happy kernel.
>
> This bites with -m32 too, so clang is presumably catastrophically
> broken for the i386 kernel until this is fixed, unless I'm missing
> something.
llvmlinux already carries my old patch (and some more) here:
arch/i586/patches/0026-Add-own-versions-of-memcpy-and-memset-for-compilatio.patch
(see also my comment on the clang PR)
cheers,
PaX Team
next prev parent reply other threads:[~2014-01-08 12:05 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-08 11:21 [PATCH 1/4] x86: Remove duplication of 16-bit CFLAGS David Woodhouse
2014-01-08 11:21 ` [PATCH 2/4] x86, boot: Use __attribute__((used)) to ensure videocard structs are emitted David Woodhouse
2014-01-22 2:03 ` [tip:x86/build] " tip-bot for David Woodhouse
2014-01-22 12:25 ` tip-bot for David Woodhouse
2014-01-08 11:21 ` [PATCH 3/4] x86: Allow building 16-bit code with -m16 with toolchains that support it David Woodhouse
2014-01-14 19:14 ` [llvmlinux] " Jan-Simon Möller
2014-01-14 23:59 ` Woodhouse, David
2014-01-22 0:54 ` David Woodhouse
2014-01-29 12:11 ` [PATCH] x86: Build 16-bit code with -m16 where possible David Woodhouse
2014-01-29 12:16 ` [PATCH v2] " David Woodhouse
2014-01-29 17:51 ` [tip:x86/build] x86, build: " tip-bot for David Woodhouse
2014-01-29 17:57 ` tip-bot for David Woodhouse
2014-01-30 16:10 ` tip-bot for David Woodhouse
2014-01-31 10:23 ` [PATCH] x86: " Pavel Machek
2014-01-08 11:21 ` [PATCH 4/4] x86, boot: Work around clang PR18415 David Woodhouse
2014-01-08 12:04 ` PaX Team [this message]
2014-01-08 13:03 ` [llvmlinux] [PATCH 1/4] x86: Remove duplication of 16-bit CFLAGS Jan-Simon Möller
2014-01-22 2:03 ` [tip:x86/build] " tip-bot for David Woodhouse
2014-01-22 12:25 ` tip-bot for David Woodhouse
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