Date: Sat, 6 May 2017 22:18:16 +0530 From: Shubham Bansal <illusionist.neo@...il.com> To: Daniel Borkmann <daniel@...earbox.net> 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 Hi Daniel, Thanks for the last reply about the testing of eBPF JIT. I have one issue though, I am not able to find what BPF_ABS and BPF_IND instruction does exactly. It not described on this link - https://www.kernel.org/doc/Documentation/networking/filter.txt either. Can you please tell me where I could find the description of these instructions please? Best, Shubham Bansal On Thu, Apr 6, 2017 at 6:21 PM, Daniel Borkmann <daniel@...earbox.net> wrote: > 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
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