Date: Sat, 06 May 2017 14:38:16 -0400 (EDT) From: David Miller <davem@...emloft.net> To: illusionist.neo@...il.com Cc: daniel@...earbox.net, keescook@...omium.org, mgherzan@...il.com, 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 From: Shubham Bansal <illusionist.neo@...il.com> Date: Sat, 6 May 2017 22:18:16 +0530 > 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. They are not instructions, they are modifiers for the BPF_LD instruction which indicate an SKB load is to be performed. You never need to ask what a BPF instruction does, it is clear defined in the BPF interperter found in kernel/bpf/core.c Look for the case statement LD_ABS_W and friends in __bpf_prog_run().
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