[...] > > > Same with MSH. BPF_LDX | BPF_MSH | BPF_B is the only insn ever existed. > > > It's a legacy insn. Just like abs/ind. > > > > Should it be listed in the legacy conformance group then? > > > > Currently it's not mentioned in instruction-set.rst at all, so the > > opcode is available to use by any new instruction. If we do list it > > in instruction-set.rst then, like abs/ind, it will be avoided by anyone proposing > new instructions. > > Yeah. The standard needs to mention it as legacy insn. > It's such a weird ultra specialized insn introduced for one specific purpose > parsing IP header. tcpdump only. Effectively. Thanks for the quick answer on this one. Will do. Dave
