On 05/05/2014 09:41 PM, Oleg Nesterov wrote: > On 05/05, Denys Vlasenko wrote: >> >> + * Opcodes we'll probably never support: >> + * 6c-6f - ins,outs. SEGVs if used in userspace >> + * e4-e7 - in,out imm. SEGVs if used in userspace >> + * ec-ef - in,out acc. SEGVs if used in userspace > > Well. I have no idea why they are nacked, but this is not the reason. > > SEGVs are fine. Plus we have ioperm().
Noted. Oleg, can you clear for me the following - If the probed instruction triggers an "illegal insn" or "privileged insn" CPU exception - are we completely fine? Or there are some problems? how bad are they? Slightly wrong signal stack? Wrong EFLAGs on stack? Wrong address of failing insn? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
