Date: Thu, 8 Aug 2013 01:27:32 -0700 From: Guy Harris <guy@alum.mit.edu> To: darrenr@netbsd.org Cc: tech-net@netbsd.org, Mindaugas Rasiukevicius <rmind@netbsd.org>, freebsd-net@freebsd.org Subject: Re: BPF_MISC+BPF_COP and BPF_COPX Message-ID: <0C9DFD21-D09F-4163-BF90-4258838577A7@alum.mit.edu> In-Reply-To: <5203535D.2040508@netbsd.org> References: <20130804191310.2FFBB14A152@mail.netbsd.org> <5202693C.50608@netbsd.org> <20130807175548.1528014A21F@mail.netbsd.org> <5203535D.2040508@netbsd.org>
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On Aug 8, 2013, at 1:14 AM, Darren Reed <darrenr@netbsd.org> wrote: > A BPF program generated on Linux is just as valid as on Solaris or = NetBSD. Not necessarily - negative offsets in load and store instructions are = supported on Linux to access some metadata that's not in the packet = data, but those aren't, as far as I know, supported on other platforms. However, there is a subset of BPF that all kernel BPF implementations, = and the userland implementation in libpcap, support.=
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