Add sfence and lfence passthrough support #37
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Needed for sfence/lfence which considers the value of the ModRM byte as part of the opcode. The alternative to adding 3-byte opcode was to use special operator values to make sure that the correct ModRM byte was generated. The current solution feels less hacky.
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@aengelke: not sure I understand your point here. But there is support in the decoder to have handlers for instructions which are part of an opcode extension group. See setOpcG(), https://github.com/lrr-tum/dbrew/blob/master/src/decode.c#L2030 |
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