RE: [PATCH 32 0/2] Handle the new .note section introduced in Linux

["Schimpe, Christina" <christina.schimpe@intel.com>]

Hi Vignesh, 

unfortunately, I missed your message. I am not sure how this could have slipped and then I've been out for a couple of weeks.

If you don't hear back from me, please ping me in the mailing lists. 
We have this guideline: https://sourceware.org/gdb/wiki/ContributionChecklist

You can expect my feedback on this next week.

Christina

> -----Original Message-----
> From: Balasubrmanian, Vignesh <Vignesh.Balasubrmanian@amd.com>
> Sent: Dienstag, 6. Januar 2026 07:49
> To: Schimpe, Christina <christina.schimpe@intel.com>; gdb-
> patches@sourceware.org; George, Jini Susan <JiniSusan.George@amd.com>;
> Sharma, Alok Kumar <AlokKumar.Sharma@amd.com>; jhb@FreeBSD.org;
> simark@simark.ca
> Subject: RE: [PATCH 32 0/2] Handle the new .note section introduced in Linux
> 
> [AMD Official Use Only - AMD Internal Distribution Only]
> 
> Hi Christina,
> 
> In my test, I read the core file's new note-section data with the program and
> compare it against the "cupid" instructions. I couldn't find any existing test
> that validates note-section contents. If full validation is too much, I can
> instead extend "maint-info-sections.exp" to check only that the section exists.
> 
> Please advise.
> 
> thanks.
> Vigneshbalu.
> 
> -----Original Message-----
> From: Schimpe, Christina <christina.schimpe@intel.com>
> Sent: Sunday, December 14, 2025 7:09 PM
> To: Balasubrmanian, Vignesh <Vignesh.Balasubrmanian@amd.com>; gdb-
> patches@sourceware.org; George, Jini Susan <JiniSusan.George@amd.com>;
> Sharma, Alok Kumar <AlokKumar.Sharma@amd.com>; jhb@FreeBSD.org;
> simark@simark.ca
> Subject: RE: [PATCH 32 0/2] Handle the new .note section introduced in Linux
> 
> Caution: This message originated from an External Source. Use proper
> caution when opening attachments, clicking links, or responding.
> 
> 
> Hi Vignesh,
> 
> I'll review the patches once we have clarified the opens for the test. Please
> see my comment below.
> 
> > -----Original Message-----
> > From: Vignesh Balasubramanian <vigbalas@amd.com>
> > Sent: Montag, 8. Dezember 2025 09:38
> > To: gdb-patches@sourceware.org; jinisusan.george@amd.com; Schimpe,
> > Christina <christina.schimpe@intel.com>; AlokKumar.Sharma@amd.com;
> > jhb@FreeBSD.org; simark@simark.ca
> > Cc: Vignesh Balasubramanian <vigbalas@amd.com>
> > Subject: [PATCH 32 0/2] Handle the new .note section introduced in
> > Linux
> >
> > The XSAVE layout of the machine where the core file is dumped is not
> > visible to GDB. It is assumed currently using some heuristics.
> >
> > It has been addressed to some extent recently but still uses heuristics.
> > https://inbox.sourceware.org/gdb-patches/2628f45a-77f7-8b2c-20aa-
> >
> da65d1d82a37@simark.ca/T/#m4c67d59c18a5962f771ba8ca1e2bee9365ad
> > 1ab2
> >
> > New patches have been committed to the linux kernel (version 6.12) to
> > resolve this issue by adding a new .note section which contains
> > descriptions of the xsave layout to the core file.
> >
> > The first of this patch set consumes this new .note section and uses
> > that to identify the xsave layout.
> > The second one enables gdb to generate a similar .note section if the
> > corefile is dumped through the 'gcore' command.
> >
> > Working on test case patch, will share it in a few days.
> 
> In the gdb testsuite we already have tests for (g)core commands and for OS
> generated corefiles.
> 
> Based on the test that you shared initially
> https://sourceware.org/pipermail/gdb-patches/2025-July/219369.html
> I wonder what your test will cover that is not tested already with existing
> tests.
> 
> Would it be sufficient to extend the existing tests in case a linux kernel >=
> 6.12 is used ?
> 
> Christina
> 
> Intel Deutschland GmbH
> Registered Address: Dornacher Straße 1, 85622 Feldkirchen, Germany
> Tel: +49 89 991 430, www.intel.de
> Managing Directors: Harry Demas, Jeffrey Schneiderman, Yin Chong Sorrell
> Chairperson of the Supervisory Board: Nicole Lau Registered Seat: Munich
> Commercial Register: Amtsgericht München HRB 186928
Intel Deutschland GmbH
Registered Address: Dornacher Straße 1, 85622 Feldkirchen, Germany
Tel: +49 89 991 430, www.intel.de
Managing Directors: Harry Demas, Jeffrey Schneiderman, Yin Chong Sorrell
Chairperson of the Supervisory Board: Nicole Lau
Registered Seat: Munich
Commercial Register: Amtsgericht München HRB 186928