From: ebiederm@xmission.com (Eric W. Biederman)
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andi Kleen <ak@muc.de>, Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, virtualization@lists.osdl.org,
xen-devel@lists.xensource.com, Chris Wright <chrisw@sous-sol.org>,
Zachary Amsden <zach@vmware.com>,
Ian Campbell <Ian.Campbell@XenSource.com>
Subject: Re: [patch 16/21] Xen-paravirt: Add code into head.S to handle being booted by Xen
Date: Wed, 14 Feb 2007 18:39:33 -0700 [thread overview]
Message-ID: <m1ire4nqqy.fsf@ebiederm.dsl.xmission.com> (raw)
In-Reply-To: <45D3A5A4.7080804@goop.org> (Jeremy Fitzhardinge's message of "Wed, 14 Feb 2007 16:13:24 -0800")
Jeremy Fitzhardinge <jeremy@goop.org> writes:
> Eric W. Biederman wrote:
>> Ok. If that is all this may be a difference that makes no difference.
>> binutils has a bad habit of looking at sections (which are fully
>> optional) instead of segments on ET_EXEC and ET_DYN objects. Only
>> ET_REL objects (.o files) are required to have sections.
>>
>
> The Xen domain loader will have to be changed to deal with that, which
> isn't too much of a problem.
Ok. Please fix the Xen domain loader to not look at sections. It
is a bug for any kind of executable loader to look at anything other
then segments.
> My main concern is the randomness of it, and whether it will fail in
> some more harmful way on other versions of binutils.
Reasonable and it's probably worth letting the binutils developer know.
I do agree that it is weird. It might be that something in binutils
doesn't like us dropping some of the notes.
>> So I recommend for testing write a 100 line program that includes
>> elf.h and reads out the note segment. If all is well we can split
>> this code out.
>>
>
> The Xen readnotes utility is essentially that. I'll hack it.
Sounds good.
Eric
WARNING: multiple messages have this Message-ID (diff)
From: ebiederm@xmission.com (Eric W. Biederman)
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andrew Morton <akpm@osdl.org>, Andi Kleen <ak@muc.de>,
xen-devel@lists.xensource.com, Chris Wright <chrisw@sous-sol.org>,
virtualization@lists.osdl.org,
Ian Campbell <Ian.Campbell@XenSource.com>,
linux-kernel@vger.kernel.org
Subject: Re: [patch 16/21] Xen-paravirt: Add code into head.S to handle being booted by Xen
Date: Wed, 14 Feb 2007 18:39:33 -0700 [thread overview]
Message-ID: <m1ire4nqqy.fsf@ebiederm.dsl.xmission.com> (raw)
In-Reply-To: <45D3A5A4.7080804@goop.org> (Jeremy Fitzhardinge's message of "Wed, 14 Feb 2007 16:13:24 -0800")
Jeremy Fitzhardinge <jeremy@goop.org> writes:
> Eric W. Biederman wrote:
>> Ok. If that is all this may be a difference that makes no difference.
>> binutils has a bad habit of looking at sections (which are fully
>> optional) instead of segments on ET_EXEC and ET_DYN objects. Only
>> ET_REL objects (.o files) are required to have sections.
>>
>
> The Xen domain loader will have to be changed to deal with that, which
> isn't too much of a problem.
Ok. Please fix the Xen domain loader to not look at sections. It
is a bug for any kind of executable loader to look at anything other
then segments.
> My main concern is the randomness of it, and whether it will fail in
> some more harmful way on other versions of binutils.
Reasonable and it's probably worth letting the binutils developer know.
I do agree that it is weird. It might be that something in binutils
doesn't like us dropping some of the notes.
>> So I recommend for testing write a 100 line program that includes
>> elf.h and reads out the note segment. If all is well we can split
>> this code out.
>>
>
> The Xen readnotes utility is essentially that. I'll hack it.
Sounds good.
Eric
next prev parent reply other threads:[~2007-02-15 1:41 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-13 22:17 [patch 00/21] Xen-paravirt: Xen guest implementation for paravirt_ops interface Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 01/21] Xen-paravirt: Fix typo in sync_constant_test_bit()s name Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 02/21] Xen-paravirt: Handle a zero-sized VT console Jeremy Fitzhardinge
2007-02-14 9:24 ` Gerd Hoffmann
2007-02-14 9:24 ` Gerd Hoffmann
2007-02-13 22:17 ` [patch 03/21] Xen-paravirt: Add pagetable accessors to pack and unpack pagetable entries Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 04/21] Xen-paravirt: paravirt_ops: hooks to set up initial pagetable Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 05/21] Xen-paravirt: paravirt_ops: allocate a fixmap slot Jeremy Fitzhardinge
2007-02-14 1:23 ` Dan Hecht
2007-02-14 1:36 ` Jeremy Fitzhardinge
2007-02-14 1:36 ` Jeremy Fitzhardinge
2007-02-14 2:34 ` Dan Hecht
2007-02-14 8:43 ` Gerd Hoffmann
2007-02-14 8:37 ` [Xen-devel] " Jan Beulich
2007-02-14 8:37 ` Jan Beulich
2007-02-14 9:15 ` [Xen-devel] " Andi Kleen
2007-02-14 9:15 ` Andi Kleen
2007-02-13 22:17 ` [patch 06/21] Xen-paravirt: remove ctor for pgd cache Jeremy Fitzhardinge
2007-02-13 22:39 ` Zachary Amsden
2007-02-13 22:17 ` [patch 07/21] Xen-paravirt: Allow paravirt backend to choose kernel PMD sharing Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 08/21] Xen-paravirt: Allow paravirt backend to select PGD allocation alignment Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 09/21] Xen-paravirt: add hooks to intercept mm creation and destruction Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 10/21] Xen-paravirt: Name: dont export paravirt_ops structure, do individual functions Jeremy Fitzhardinge
2007-02-14 1:06 ` Zachary Amsden
2007-02-14 1:06 ` Zachary Amsden
2007-02-14 1:16 ` Jeremy Fitzhardinge
2007-02-14 1:16 ` Jeremy Fitzhardinge
2007-02-14 1:18 ` Zachary Amsden
2007-02-14 1:18 ` Zachary Amsden
2007-02-14 1:37 ` Jeremy Fitzhardinge
2007-02-14 1:37 ` Jeremy Fitzhardinge
2007-02-14 1:43 ` Zachary Amsden
2007-02-14 1:43 ` Zachary Amsden
2007-02-14 1:44 ` Jeremy Fitzhardinge
2007-02-14 1:44 ` Jeremy Fitzhardinge
2007-02-14 5:51 ` Rusty Russell
2007-02-14 5:51 ` Rusty Russell
2007-02-14 19:36 ` Christoph Hellwig
2007-02-13 22:17 ` [patch 11/21] Xen-paravirt: Add apply_to_page_range() which applies a function to a pte range Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 12/21] Xen-paravirt: Allocate and free vmalloc areas Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 13/21] Xen-paravirt: Add nosegneg capability to the vsyscall page notes Jeremy Fitzhardinge
2007-02-13 22:45 ` Zachary Amsden
2007-02-13 22:45 ` Zachary Amsden
2007-02-13 22:49 ` Jeremy Fitzhardinge
2007-02-13 22:49 ` Jeremy Fitzhardinge
2007-02-13 22:54 ` Zachary Amsden
2007-02-13 22:54 ` Zachary Amsden
2007-02-13 23:13 ` Jeremy Fitzhardinge
2007-02-13 23:13 ` Jeremy Fitzhardinge
2007-02-14 5:38 ` [Xen-devel] " Rusty Russell
2007-02-14 5:38 ` Rusty Russell
2007-02-13 22:17 ` [patch 14/21] Xen-paravirt: Add XEN config options and disable unsupported config options Jeremy Fitzhardinge
2007-02-13 22:53 ` Dan Hecht
2007-02-13 22:53 ` Dan Hecht
2007-02-13 23:29 ` Jeremy Fitzhardinge
2007-02-13 23:29 ` Jeremy Fitzhardinge
2007-02-13 23:58 ` [Xen-devel] " Zachary Amsden
2007-02-13 23:58 ` Zachary Amsden
2007-02-13 23:58 ` Dan Hecht
2007-02-13 22:17 ` [patch 15/21] Xen-paravirt: Add Xen interface header files Jeremy Fitzhardinge
2007-02-14 20:45 ` Eric W. Biederman
2007-02-14 20:45 ` Eric W. Biederman
2007-02-15 0:10 ` Jeremy Fitzhardinge
2007-02-15 0:10 ` Jeremy Fitzhardinge
2007-02-15 17:32 ` Christoph Hellwig
2007-02-13 22:17 ` [patch 16/21] Xen-paravirt: Add code into head.S to handle being booted by Xen Jeremy Fitzhardinge
2007-02-13 23:54 ` Andi Kleen
2007-02-14 0:39 ` Jeremy Fitzhardinge
2007-02-14 0:39 ` Jeremy Fitzhardinge
2007-02-14 8:56 ` [Xen-devel] " Jan Beulich
2007-02-14 8:56 ` Jan Beulich
2007-02-14 18:53 ` Jeremy Fitzhardinge
2007-02-14 18:53 ` Jeremy Fitzhardinge
2007-02-14 20:10 ` Eric W. Biederman
2007-02-14 20:10 ` Eric W. Biederman
2007-02-14 20:41 ` Jeremy Fitzhardinge
2007-02-14 20:41 ` Jeremy Fitzhardinge
2007-02-14 21:06 ` Eric W. Biederman
2007-02-14 21:06 ` Eric W. Biederman
2007-02-15 0:13 ` Jeremy Fitzhardinge
2007-02-15 0:13 ` Jeremy Fitzhardinge
2007-02-15 1:39 ` Eric W. Biederman [this message]
2007-02-15 1:39 ` Eric W. Biederman
2007-02-15 1:52 ` Jeremy Fitzhardinge
2007-02-15 1:52 ` Jeremy Fitzhardinge
2007-02-15 2:18 ` Eric W. Biederman
2007-02-15 2:18 ` Eric W. Biederman
2007-02-15 2:23 ` Jeremy Fitzhardinge
2007-02-15 2:23 ` Jeremy Fitzhardinge
2007-02-15 2:41 ` Eric W. Biederman
2007-02-15 2:41 ` Eric W. Biederman
2007-02-14 20:33 ` Eric W. Biederman
2007-02-14 20:33 ` Eric W. Biederman
2007-02-14 20:42 ` Jeremy Fitzhardinge
2007-02-14 20:42 ` Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 17/21] Xen-paravirt: Add the Xen virtual console driver Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 18/21] Xen-paravirt: Add Xen grant table support Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 19/21] Xen-paravirt: Add the Xenbus sysfs and virtual device hotplug driver Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 20/21] Xen-paravirt: Add Xen virtual block device driver Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 21/21] Xen-paravirt: Add the Xen virtual network " Jeremy Fitzhardinge
2007-02-14 20:40 ` Eric W. Biederman
2007-02-14 20:40 ` Eric W. Biederman
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