Re: tprof(8) ABI

[Martin Husemann <martin%duskware.de@localhost>]

On Sun, Apr 19, 2026 at 11:10:47PM -0700, Kevin Bowling wrote:
> We are instrumenting the 64-bit kernel, but we are using a 32-bit
> userland utility to tell us what is going on in the 64-bit kernel.  I
> think it's a binary contract, the tprof driver pumps out the hardware
> events, so you'd want the 'real' PC but for this ABI break.  On 32-bit
> systems it would just make the profile files a little bigger.

Ok, for that case we can build the userland tool as 64bit (I think
we do that for a few tools already). N32 userland is special as we don't
have to expect a 32bit kernel (different to e.g. sparc userland where both
could happen).

But from this PoV your suggested change makes sense to me.

Martin