On Thu, Jun 09, 2016 at 10:31:01AM +0200, Jiri Slaby wrote: > On 04/12/2016, 05:56 PM, Josh Poimboeuf wrote: > >> We had been using unwinder for over a decade in SUSE but it stopped > >> working for assembly recently (for obvious reasons). So having a working > >> and reliable unwinder again is one of the top priorities for us. > > > > Since you already have an unwinder in SUSE, it sounds like what you need > > most urgently is DWARF generation support in objtool so that your > > unwinder will work again for asm code, right? The kernel already emits > > DWARF today (for C code), so an upstream unwinder isn't needed first. > > Right, that's exact. > > > That's high on my TODO list, and the coding is probably 70-80% done. I > > don't want to hold up progress... But I don't really feel comfortable > > passing the code off because it's quite a big feature with some major > > changes to objtool. Being the objtool author, I want to make sure to > > give it my full attention. > > Sure. There is going to be no pressure to merge the v1 of the changes. > But it would be nice to see what you have now so that we can start > reviewing and proposing patches on the top of what you have :). The code is still quite a mess and doesn't even work yet. I think it would be counterproductive for everybody if I were to share it at this stage. > > I'm spread quite thin at the moment but I do hope to have v1 of those > > patches soon, hopefully May-ish. > > So I hope we will see something we can start working on now. I can > really dedicate one-man hours to that work. I do appreciate your offer to help. Hopefully soon I'll get it to at least a decently working and halfway readable state, and then I'll post it. Then any help will be much appreciated. -- Josh -- To unsubscribe from this list: send the line "unsubscribe live-patching" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
