netdev - Re: [bpf-next V3 PATCH 0/5] tools/libbpf improvements and selftests

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Message-ID: <09906a95-00ed-949d-6287-c78babf20dca@iogearbox.net>
Date:   Fri, 9 Feb 2018 02:32:27 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Jesper Dangaard Brouer <brouer@...hat.com>, netdev@...r.kernel.org,
        Daniel Borkmann <borkmann@...earbox.net>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        wangnan0@...wei.com
Cc:     jakub.kicinski@...ronome.com, joe@....org, acme@...hat.com,
        eric@...it.org, yhs@...com
Subject: Re: [bpf-next V3 PATCH 0/5] tools/libbpf improvements and selftests

On 02/08/2018 12:48 PM, Jesper Dangaard Brouer wrote:
> While playing with using libbpf for the Suricata project, we had
> issues LLVM >= 4.0.1 generating ELF files that could not be loaded
> with libbpf (tools/lib/bpf/).
> 
> During the troubleshooting phase, I wrote a test program and improved
> the debugging output in libbpf.  I turned this into a selftests
> program, and it also serves as a code example for libbpf in itself.
> 
> I discovered that there are at least three ELF load issues with
> libbpf.  I left them as TODO comments in (tools/testing/selftests/bpf)
> test_libbpf.sh. I've only fixed the load issue with eh_frames, and
> other types of relo-section that does not have exec flags.  We can
> work on the other issues later.

Applied it to bpf tree, thanks Jesper!