From: Rusty Russell <rusty@rustcorp.com.au>
To: lkp@lists.01.org
Subject: Re: [PATCH] drm/radeon: Try to init amdkfd only if 64 bit kernel
Date: Wed, 07 Jan 2015 09:28:31 +1030 [thread overview]
Message-ID: <87mw5v4iug.fsf@rustcorp.com.au> (raw)
In-Reply-To: <CAGXu5jJ71tM99uaRoq74AkcB5KhxsfBS3NyDuJ2rJncKmfCWwg@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 780 bytes --]
Kees Cook <keescook@chromium.org> writes:
> On Sun, Jan 4, 2015 at 8:28 PM, Rusty Russell <rusty@rustcorp.com.au> wrote:
>> Kees, as far as I can tell you need another 0-terminated vmlinux.relocs
>> section for weak symbols. These should not be relocated if already 0.
>
> A few questions:
>
> Why doesn't this break on 32-bit without kASLR? 32-bit does relocation
> by default, even without CONFIG_RANDOMIZE_BASE.
Well, the offset was 0 until I removed CONFIG_HIBERNATE.
> Are there any symbols that are NULL that aren't weak? I'd expect all
> strong symbols to have non-zero offsets, but I must be
> misunderstanding something here.
I don't think there would be. Anyway, you might be able to filter them
out in x86/tools/relocs itself.
Cheers,
Rusty.
WARNING: multiple messages have this Message-ID (diff)
From: Rusty Russell <rusty@rustcorp.com.au>
To: Kees Cook <keescook@chromium.org>
Cc: Oded Gabbay <oded.gabbay@amd.com>,
Andi Kleen <ak@linux.intel.com>,
Alex Deucher <alexdeucher@gmail.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Dana Elifaz <Dana.Elifaz@amd.com>,
LKML <linux-kernel@vger.kernel.org>,
Maling list - DRI developers <dri-devel@lists.freedesktop.org>,
Alexander Deucher <Alexander.Deucher@amd.com>,
LKP ML <lkp@01.org>
Subject: Re: [LKP] [PATCH] drm/radeon: Try to init amdkfd only if 64 bit kernel
Date: Wed, 07 Jan 2015 09:28:31 +1030 [thread overview]
Message-ID: <87mw5v4iug.fsf@rustcorp.com.au> (raw)
In-Reply-To: <CAGXu5jJ71tM99uaRoq74AkcB5KhxsfBS3NyDuJ2rJncKmfCWwg@mail.gmail.com>
Kees Cook <keescook@chromium.org> writes:
> On Sun, Jan 4, 2015 at 8:28 PM, Rusty Russell <rusty@rustcorp.com.au> wrote:
>> Kees, as far as I can tell you need another 0-terminated vmlinux.relocs
>> section for weak symbols. These should not be relocated if already 0.
>
> A few questions:
>
> Why doesn't this break on 32-bit without kASLR? 32-bit does relocation
> by default, even without CONFIG_RANDOMIZE_BASE.
Well, the offset was 0 until I removed CONFIG_HIBERNATE.
> Are there any symbols that are NULL that aren't weak? I'd expect all
> strong symbols to have non-zero offsets, but I must be
> misunderstanding something here.
I don't think there would be. Anyway, you might be able to filter them
out in x86/tools/relocs itself.
Cheers,
Rusty.
next prev parent reply other threads:[~2015-01-06 22:58 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-22 11:11 [PATCH] drm/radeon: Try to init amdkfd only if 64 bit kernel Oded Gabbay
2014-12-22 11:11 ` Oded Gabbay
2014-12-22 11:11 ` Oded Gabbay
2014-12-22 16:58 ` Alex Deucher
2014-12-22 16:58 ` Alex Deucher
2014-12-22 16:58 ` Alex Deucher
2014-12-22 18:49 ` Andi Kleen
2014-12-22 18:49 ` [LKP] " Andi Kleen
2014-12-22 19:00 ` Andi Kleen
2014-12-22 19:00 ` [LKP] " Andi Kleen
2014-12-22 19:18 ` Oded Gabbay
2014-12-22 19:18 ` [LKP] " Oded Gabbay
2014-12-22 19:18 ` Oded Gabbay
2014-12-23 23:01 ` Rusty Russell
2014-12-23 23:01 ` [LKP] " Rusty Russell
2014-12-24 9:16 ` Oded Gabbay
2014-12-24 9:22 ` Oded Gabbay
2014-12-24 9:22 ` [LKP] " Oded Gabbay
2015-01-05 4:28 ` Rusty Russell
2015-01-05 4:28 ` [LKP] " Rusty Russell
2015-01-06 20:14 ` Kees Cook
2015-01-06 20:14 ` [LKP] " Kees Cook
2015-01-06 22:58 ` Rusty Russell [this message]
2015-01-06 22:58 ` Rusty Russell
2015-01-11 11:57 ` Oded Gabbay
2015-01-11 11:57 ` [LKP] " Oded Gabbay
2015-01-11 11:57 ` Oded Gabbay
2015-01-13 17:15 ` Kees Cook
2015-01-13 17:15 ` [LKP] " Kees Cook
2015-01-16 0:27 ` Kees Cook
2015-01-16 0:27 ` [LKP] " Kees Cook
2015-01-16 11:27 ` Oded Gabbay
2015-01-16 11:27 ` [LKP] " Oded Gabbay
2015-01-16 11:27 ` Oded Gabbay
2015-01-23 4:10 ` Rusty Russell
2015-01-23 4:10 ` [LKP] " Rusty Russell
2014-12-25 12:31 ` Christian König
2014-12-25 12:31 ` [LKP] " Christian König
2014-12-25 12:31 ` Christian König
2014-12-28 9:05 ` Oded Gabbay
2014-12-28 9:05 ` [LKP] " Oded Gabbay
2014-12-28 9:05 ` Oded Gabbay
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