netdev - Re: arch: arm: bpf: Converting cBPF to eBPF for arm 32 bit

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Message-ID: <58E639E0.1010700@iogearbox.net>
Date:   Thu, 06 Apr 2017 14:51:44 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Shubham Bansal <illusionist.neo@...il.com>
CC:     David Miller <davem@...emloft.net>,
        Kees Cook <keescook@...omium.org>,
        Mircea Gherzan <mgherzan@...il.com>,
        Network Development <netdev@...r.kernel.org>,
        kernel-hardening@...ts.openwall.com,
        linux-arm-kernel@...ts.infradead.org, ast@...com
Subject: Re: arch: arm: bpf: Converting cBPF to eBPF for arm 32 bit

On 04/06/2017 01:05 PM, Shubham Bansal wrote:
> Gentle Reminder.

Sorry for late reply.

> Anybody can tell me how to test the JIT compiler ?

There's lib/test_bpf.c, see Documentation/networking/filter.txt +1349
for some more information. It basically contains various test cases that
have the purpose to test the JIT with corner cases. If you see a useful
test missing, please send a patch for it, so all other JITs can benefit
from this as well. For extracting disassembly from a generated test case,
check out bpf_jit_disasm (Documentation/networking/filter.txt +486).

Thanks,
Daniel