From: Justin Forbes <jmforbes@linuxtx.org>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
Aurelien Jarno <aurelien@aurel32.net>,
LKML <linux-kernel@vger.kernel.org>,
linuxppc-dev@lists.ozlabs.org, debian-kernel@lists.debian.org,
Alexei Starovoitov <ast@kernel.org>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>, Andrii Nakryiko <andriin@fb.com>,
"open list:BPF (Safe dynamic programs and tools)"
<netdev@vger.kernel.org>,
"open list:BPF (Safe dynamic programs and tools)"
<bpf@vger.kernel.org>
Subject: Re: [PATCH] libbpf: fix readelf output parsing on powerpc with recent binutils
Date: Tue, 10 Dec 2019 12:58:33 -0600 [thread overview]
Message-ID: <CAFxkdAqg6RaGbRrNN3e_nHfHFR-xxzZgjhi5AnppTxxwdg0VyQ@mail.gmail.com> (raw)
In-Reply-To: <20191202093752.GA1535@localhost.localdomain>
On Mon, Dec 2, 2019 at 3:37 AM Daniel Borkmann <daniel@iogearbox.net> wrote:
>
> On Mon, Dec 02, 2019 at 04:53:26PM +1100, Michael Ellerman wrote:
> > Aurelien Jarno <aurelien@aurel32.net> writes:
> > > On powerpc with recent versions of binutils, readelf outputs an extra
> > > field when dumping the symbols of an object file. For example:
> > >
> > > 35: 0000000000000838 96 FUNC LOCAL DEFAULT [<localentry>: 8] 1 btf_is_struct
> > >
> > > The extra "[<localentry>: 8]" prevents the GLOBAL_SYM_COUNT variable to
> > > be computed correctly and causes the checkabi target to fail.
> > >
> > > Fix that by looking for the symbol name in the last field instead of the
> > > 8th one. This way it should also cope with future extra fields.
> > >
> > > Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
> > > ---
> > > tools/lib/bpf/Makefile | 4 ++--
> > > 1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > Thanks for fixing that, it's been on my very long list of test failures
> > for a while.
> >
> > Tested-by: Michael Ellerman <mpe@ellerman.id.au>
>
> Looks good & also continues to work on x86. Applied, thanks!
This actually seems to break horribly on PPC64le with binutils 2.33.1
resulting in:
Warning: Num of global symbols in sharedobjs/libbpf-in.o (32) does NOT
match with num of versioned symbols in libbpf.so (184). Please make
sure all LIBBPF_API symbols are versioned in libbpf.map.
This is the only arch that fails, with x86/arm/aarch64/s390 all
building fine. Reverting this patch allows successful build across
all arches.
Justin
next prev parent reply other threads:[~2019-12-10 18:58 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-01 19:57 [PATCH] libbpf: fix readelf output parsing on powerpc with recent binutils Aurelien Jarno
2019-12-02 5:53 ` Michael Ellerman
2019-12-02 9:37 ` Daniel Borkmann
2019-12-10 18:58 ` Justin Forbes [this message]
2019-12-10 22:25 ` Thadeu Lima de Souza Cascardo
2019-12-11 15:33 ` Justin Forbes
2019-12-11 16:00 ` Aurelien Jarno
2019-12-11 16:01 ` Thadeu Lima de Souza Cascardo
2019-12-11 16:52 ` Justin Forbes
2019-12-13 10:11 ` [PATCH] libbpf: Fix readelf output parsing for Fedora Thadeu Lima de Souza Cascardo
2019-12-13 17:02 ` Andrii Nakryiko
2019-12-15 17:42 ` Alexei Starovoitov
2019-12-12 0:53 ` [PATCH] libbpf: fix readelf output parsing on powerpc with recent binutils Michael Ellerman
2019-12-13 15:39 ` Ben Hutchings
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAFxkdAqg6RaGbRrNN3e_nHfHFR-xxzZgjhi5AnppTxxwdg0VyQ@mail.gmail.com \
--to=jmforbes@linuxtx.org \
--cc=andriin@fb.com \
--cc=ast@kernel.org \
--cc=aurelien@aurel32.net \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=debian-kernel@lists.debian.org \
--cc=kafai@fb.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mpe@ellerman.id.au \
--cc=netdev@vger.kernel.org \
--cc=songliubraving@fb.com \
--cc=yhs@fb.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).