On 04/04/2016, 07:54 PM, Josh Poimboeuf wrote: > On Thu, Mar 31, 2016 at 03:03:16PM +0200, Miroslav Benes wrote: >> On Fri, 25 Mar 2016, Josh Poimboeuf wrote: >> >>> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig >>> index 2dc18605..76274b8 100644 >>> --- a/arch/x86/Kconfig >>> +++ b/arch/x86/Kconfig >>> @@ -138,6 +138,7 @@ config X86 >>> select HAVE_PERF_REGS >>> select HAVE_PERF_USER_STACK_DUMP >>> select HAVE_REGS_AND_STACK_ACCESS_API >>> + select HAVE_RELIABLE_STACKTRACE if X86_64 && FRAME_POINTER >> >> I understand we have to rely on frame pointer for now. Do you plan to >> switch to dwarf unwinder one day in the future? IOW is there a plan to >> implement dwarf stuff generation in objtool and then to have a dwarf-based >> stack unwinder upstream and to use it for live patching? > > Yes, adding DWARF validation and generation to objtool and creating a > DWARF unwinder upstream are all planned, hopefully soon. I may seem to be obtrusive, but here, I would like to offer my help again. If you need any kind of help with the unwinder, I can definitely help with that. Be it coding, testing, ideas discussion or anything else. 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. thanks, -- js suse labs
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