On Mon, 2010-01-18 at 14:09 +0200, Avi Kivity wrote: > On 01/18/2010 02:06 PM, Peter Zijlstra wrote: > > On Mon, 2010-01-18 at 14:01 +0200, Avi Kivity wrote: > > > >> Maybe you place no value on uprobes. But people who debug userspace > >> likely will see a reason. > >> > > I do see value in uprobes, I just don't like it mucking about with the > > address space. Nor does it appear required. > > > > Well, the alternatives are very unappealing. Emulation and > single-stepping are going to be very slow compared to a couple of jumps.
With CPL2 or RPL on user segments the protection issue seems to be manageable for running the instructions from kernel space.
