From: Thomas Monjalon <thomas@monjalon.net>
To: Konstantin Ananyev <konstantin.ananyev@intel.com>
Cc: dev@dpdk.org, stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] bpf: fix pseudo calls for BPF programs loaded from ELF
Date: Wed, 05 Jun 2019 18:33:28 +0200 [thread overview]
Message-ID: <1853797.H4zF8rg7Bj@xps> (raw)
In-Reply-To: <20190517140942.20724-1-konstantin.ananyev@intel.com>
17/05/2019 16:09, Konstantin Ananyev:
> clang 6.0 and onwards, for the external function call generates
> BPF_PSEUDO_CALL instruction:
> call pseudo +-off -> call another bpf function.
> More details about that change: https://lwn.net/Articles/741773/
> DPDK BPF implementation right now doesn't support multiple BPF
> functions per module.
> To overcome that problem, and preserve existing functionality
> (ability to call allowed by user external functions),
> bpf_elf_load() clears EBPF_PSEUDO_CALL value.
> For details how to reproduce the issue:
> https://bugs.dpdk.org/show_bug.cgi?id=259
>
> Fixes: 5dba93ae5f2d ("bpf: add ability to load eBPF program from ELF object file")
> Cc: stable@dpdk.org
>
> Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Applied, thanks
prev parent reply other threads:[~2019-06-05 16:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-17 14:09 Konstantin Ananyev
2019-06-05 16:33 ` Thomas Monjalon [this message]
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