On Mon, Mar 09, 2020 at 09:05:05PM +0000, Mark Brown wrote: > On Fri, Mar 06, 2020 at 10:27:29AM +0000, Catalin Marinas wrote: > > Does this series affect uprobes in any way? I.e. can you probe a landing > > pad? > You can't probe a landing pad, uprobes on landing pads will be silently > ignored so the program isn't disrupted, you just don't get the expected > trace from those uprobes. This isn't new with the BTI support since > the landing pads are generally pointer auth instructions, these already > can't be probed regardless of what's going on with this series. It's > already on the list to get sorted. Sorry, I realized thanks to Amit's off-list prompting that I was testing that I was verifying with the wrong kernel binary here (user error since it took me a while to sort out uprobes) so this isn't quite right - you can probe the landing pads with or without this series.
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