On Thu, Nov 19, 2015 at 06:43:14PM +0800, Wangnan (F) wrote: > Also, why not fixing rsp in kernel if that instruction is a 'callq'? > For avoiding instruction decoding?
Why would the kernel do that? It doesn't need this. Have userspace do it when trying to interpret the data. If PERF_EFLAGS_EXACT is set, you know the IP points to the actual instruction and you can attempt to undo whatever parts of it you need at post processing time. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
