netdev - RE: [PATCH v2 bpf-next 02/14] libbpf: parse multi-function sections into multiple BPF programs

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Message-ID: <5f4f36dc134c5_5f39820836@john-XPS-13-9370.notmuch>
Date:   Tue, 01 Sep 2020 23:08:28 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     Andrii Nakryiko <andriin@...com>, bpf@...r.kernel.org,
        netdev@...r.kernel.org, ast@...com, daniel@...earbox.net
Cc:     andrii.nakryiko@...il.com, kernel-team@...com,
        Andrii Nakryiko <andriin@...com>
Subject: RE: [PATCH v2 bpf-next 02/14] libbpf: parse multi-function sections
 into multiple BPF programs

Andrii Nakryiko wrote:
> Teach libbpf how to parse code sections into potentially multiple bpf_program
> instances, based on ELF FUNC symbols. Each BPF program will keep track of its
> position within containing ELF section for translating section instruction
> offsets into program instruction offsets: regardless of BPF program's location
> in ELF section, it's first instruction is always at local instruction offset
> 0, so when libbpf is working with relocations (which use section-based
> instruction offsets) this is critical to make proper translations.
> 
> Signed-off-by: Andrii Nakryiko <andriin@...com>
> ---

Acked-by: John Fastabend <john.fastabend@...il.com>