DWARF-5 support was added in GDB-8.0. There GDB update to version 10.2 is going
on right now. It will solve the issue of kernels built with dwarf-5 debuginfo.
Thanks,
--Alexey
On 7/28/21, 11:14 AM, "crash-utility-bounces@xxxxxxxxxx on behalf of David Wysochanski" <crash-utility-bounces@xxxxxxxxxx on behalf of dwysocha@xxxxxxxxxx> wrote:
On Wed, Apr 28, 2021 at 8:54 AM lijiang <lijiang@xxxxxxxxxx> wrote:
>
> 在 2021年04月26日 19:17, crash-utility-request@xxxxxxxxxx 写道:
> > Message: 3
> > Date: Mon, 26 Apr 2021 11:27:40 +0300
> > From: Vasily Averin <vvs@xxxxxxxxxxxxx>
> > To: crash-utility@xxxxxxxxxx
> > Subject: crash does not work with last fedora kernels?
> > Message-ID: <8f8782a9-3da6-5d3c-c509-8b8ec8a30957@xxxxxxxxxxxxx>
> > Content-Type: text/plain; charset=utf-8
> >
> > It looks like Fedora kernels uses gcc11 and generates debuginfo in DWARF 5 format.
> >
> > [root@localhost ~]# rpm -q crash
> > crash-7.2.9-5.fc35.x86_64
> > [root@localhost ~]# uname -a
> > Linux localhost.localdomain 5.11.12-300.fc34.x86_64 #1 SMP Wed Apr 7 16:31:13 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
> >
> >
> > [root@localhost ~]# crash -1
> > Dwarf Error: wrong version in compilation unit header (is 5, should be 2, 3, or 4) [in module /usr/lib/debug/usr/lib/modules/5.11.12-300.fc34.x86_64/vmlinux]
> > crash: gdb_session_init: pulling in debug data by accessing init_mm.mmap
> > Dwarf Error: wrong version in compilation unit header (is 5, should be 2, 3, or 4) [in module /usr/lib/debug/usr/lib/modules/5.11.12-300.fc34.x86_64/vmlinux]
> >
> > crash: /usr/lib/debug/lib/modules/5.11.12-300.fc34.x86_64/vmlinux: no debugging data available
> >
> > [root@localhost ~]# ls -al /usr/lib/debug/lib/modules/5.11.12-300.fc34.x86_64/vmlinux
> > -rwxr-xr-x. 1 root root 679679112 Apr 7 20:14 /usr/lib/debug/lib/modules/5.11.12-300.fc34.x86_64/vmlinux
> > [root@localhost ~]# rpm -qf /usr/lib/debug/lib/modules/5.11.12-300.fc34.x86_64/vmlinux
> > kernel-debuginfo-5.11.12-300.fc34.x86_64
> >
> > NB: last fc35 does not work too.
> >
>
> Thank you for reporting this issue, Vasily.
>
> The DWARF-5 caused this failure. I will have a look and try to handle this issue later.
>
> Thanks.
> Lianbo
>
What's the status of this issue? Is this due to needing updated
embedded gdb or something else?
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