From: "Wieczorkiewicz, Pawel" <wipawel@amazon.de>
To: Sergey Dyasli <sergey.dyasli@citrix.com>
Cc: "Paraschiv, Andra-Irina" <andraprs@amazon.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
"Wieczorkiewicz, Pawel" <wipawel@amazon.de>,
"Pohlack, Martin" <mpohlack@amazon.de>,
Ross Lagerwall <ross.lagerwall@citrix.com>,
"Manthey, Norbert" <nmanthey@amazon.de>,
Martin Mazein <amazein@amazon.de>,
Xen-devel <xen-devel@lists.xenproject.org>,
"Doebel, Bjoern" <doebel@amazon.de>
Subject: Re: [Xen-devel] livepatch-build-tools regression
Date: Tue, 26 Nov 2019 18:37:47 +0000 [thread overview]
Message-ID: <CF690FB1-DF59-44B3-AB3F-B2101617826E@amazon.com> (raw)
In-Reply-To: <60D2D242-4806-402F-99BC-F0CE572E5925@amazon.com>
It looks like gcc plays the usual dirty tricks with local variables renaming:
- xen-syms
7529: ffff82d0805fed50 8 OBJECT LOCAL DEFAULT 4230 lastpage.22857
- livepatch
289: 0000000000000000 8 OBJECT GLOBAL DEFAULT UND hvm.c#lastpage.22856
Then, symbols resolution by name fails..
Can you please try to build the livepatch module with additional option '—prelink' and give it a try ?
> On 26. Nov 2019, at 18:51, Wieczorkiewicz, Pawel <wipawel@amazon.de> wrote:
>
>
>
>> On 20. Nov 2019, at 12:42, Sergey Dyasli <sergey.dyasli@citrix.com> wrote:
>>
>> On 19/11/2019 17:21, Wieczorkiewicz, Pawel wrote:
>>>
>>>
>>>> On 18. Nov 2019, at 18:41, Sergey Dyasli <sergey.dyasli@citrix.com> wrote:
>>>>
>>>> On 18/11/2019 17:28, Wieczorkiewicz, Pawel wrote:
>>>>>
>>>>> Could you build the lp with debug (-d) and provide me with the create-diff-object.log file?
>>>>>
>>>>
>>>> I've attached the log. Btw, I think I provided all the necessary information
>>>> for others to repeat my experiment.
>>>>
>>>
>>> Sorry for another request, but I do not seem to be able to reproduce this locally.
>>> Could you send me the livepatch module binary that fails to upload?
>>
>> That's interesting. I've attached the binary that my system produces.
>> What version of gcc do you use?
>
> The version used was: gcc (GCC) 7.2.1 20170915
>
> But I have finally managed to reproduce the issue with:
> 1. gcc (Ubuntu 6.5.0-2ubuntu1~18.04) 6.5.0 20181026
> 2. gcc-7 (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0
>
> I think it is not related to the commit:
> commit 854a7ca60e35 "create-diff-object: Do not include all .rodata sections"
>
> I managed to reproduce it also with earlier version commit:
> "0c10457 Remove section alignment requirement"
>
> But this time a different symbol causes the failure:
>
> (XEN) livepatch: 0001-live-patch: Unknown symbol: hvm.c#lastpage.22856
>
>>
>> --
>> Thanks,
>> Sergey
>> <0001-live-patch-stripped.livepatch>
>
> Best Regards,
> Pawel Wieczorkiewicz
Best Regards,
Pawel Wieczorkiewicz
Amazon Development Center Germany GmbH
Krausenstr. 38
10117 Berlin
Geschaeftsfuehrung: Christian Schlaeger, Ralf Herbrich
Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B
Sitz: Berlin
Ust-ID: DE 289 237 879
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next prev parent reply other threads:[~2019-11-26 18:43 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-18 16:42 [Xen-devel] livepatch-build-tools regression Sergey Dyasli
2019-11-18 16:47 ` Wieczorkiewicz, Pawel
2019-11-18 17:09 ` Sergey Dyasli
2019-11-18 17:28 ` Wieczorkiewicz, Pawel
2019-11-18 17:41 ` Sergey Dyasli
2019-11-19 17:21 ` Wieczorkiewicz, Pawel
2019-11-20 11:42 ` Sergey Dyasli
2019-11-26 17:51 ` Wieczorkiewicz, Pawel
2019-11-26 18:37 ` Wieczorkiewicz, Pawel [this message]
2019-11-27 11:16 ` Sergey Dyasli
2019-11-27 15:22 ` Wieczorkiewicz, Pawel
2019-11-27 15:56 ` Sergey Dyasli
2019-12-02 8:26 ` Wieczorkiewicz, Pawel
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