Re: Getting empty callchain from perf_callchain_kernel()

From: Josh Poimboeuf
Date: Thu Jun 06 2019 - 20:02:42 EST

On Thu, Jun 06, 2019 at 04:04:48PM +0000, Song Liu wrote:
> >> Here's a tentative BPF fix for the JIT frame pointer issue. It was a
> >> bit harder than I expected. Encoding r12 as a base register requires a
> >> SIB byte, so I had to add support for encoding that. I also simplified
> >> the prologue to resemble a GCC prologue, which decreases the prologue
> >> size quite a bit.
> >>
> >> Next week I can work on the corresponding ORC change. Then I can clean
> >> all the patches up and submit them properly.
> Hi Josh,
> Have you got luck fixing the ORC side?

Sorry, I've been traveling this week and I haven't had a chance to work
on it. It's at the top of my TODO list for next week.