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Date: Wed, 13 Aug 2014 14:38:49 -0700 From: Andy Lutomirski <luto@...capital.net> To: Alexei Starovoitov <ast@...mgrid.com> Cc: "David S. Miller" <davem@...emloft.net>, Ingo Molnar <mingo@...nel.org>, Linus Torvalds <torvalds@...ux-foundation.org>, Steven Rostedt <rostedt@...dmis.org>, Daniel Borkmann <dborkman@...hat.com>, Chema Gonzalez <chema@...gle.com>, Eric Dumazet <edumazet@...gle.com>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, "H. Peter Anvin" <hpa@...or.com>, Andrew Morton <akpm@...ux-foundation.org>, Kees Cook <keescook@...omium.org>, Linux API <linux-api@...r.kernel.org>, Network Development <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH RFC v4 net-next 01/26] net: filter: add "load 64-bit immediate" eBPF instruction On Wed, Aug 13, 2014 at 2:37 PM, Alexei Starovoitov <ast@...mgrid.com> wrote: > I don't need an instruction that loads low 32-bit. It already exists. > It's called 'mov'. > I'm going to try encoding: > insn[0].code = LD | IMM | DW > insn[1].code = 0 > zero is invalid opcode, so it's your 'continuation'. > and it is still single 16-byte instructions without any interpreter overhead. Works for me. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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