On 2016/06/10 08:08PM, Naveen N. Rao wrote: > On 2016/06/10 10:36AM, Arnaldo Carvalho de Melo wrote: > > Em Fri, Jun 10, 2016 at 06:32:51PM +0530, Naveen N. Rao escreveu: > > > Convert ins__find() to a __weak function for generic functionality, > > > while adding a powerpc-specific variant. We look at the function name > > > for branch instructions and classify the instructions to one among a > > > branch, a function call (branch with LR update) or a function return > > > (branch to LR). > > > > How would this allow one to get a perf.data collected on a powerpc > > system, transfer it to a x86-64 (or aarch64, to mention another > > workstation wannabe chip) system and then try annotating it? > > > > There was a previous discussion about this, and it involved having all > > yout ppc tables available as well as other arches tables, and then > > choosing which one to use based on: > > > > normalize_arch(thread->mg->machine->env->arch) > > > > just like was done for support cross unwinding, see recent patch kit by > > He Kuang, CCed. > > Nice. This would be good to have. I will look at adding powerpc support > for cross-architecture unwind. > > However, for cross-architecture annotation, I think there will be a lot > more dependencies since perf currently uses objdump to obtain the > disassembly. In addition, the actual binaries will also be needed.
perf report already has a --objdump flag... will look into this later next week. - Naveen
