On Thu, Sep 22, 2016 at 1:59 PM, Vineet Gupta <Vineet.Gupta1 at synopsys.com> wrote: > Hi Daniel, > > On 09/19/2016 06:21 PM, Daniel Mentz wrote: >> I confirmed that the .eh_frame section is present and that the >> .debug_frame section is absent. I also verified that the file size of >> the .ko files are small enough for our embedded platform and that >> unnecessary sections like .debug_info, .debug_line, .debug_str etc. >> are also absent. > > BTW it seems with my latest set of patches, modules still have .debug_*. > Can you double check if your tree still has the interim patch which added a linker > script for modules to strip out .debug_* > > http://lists.infradead.org/pipermail/linux-snps-arc/2016-September/001483.html Hi Vineet, Sorry, that was a misunderstanding. Buildroot routinely runs the strip command on .ko files before installing them on the target. I was only looking at the .ko files *after* running the strip command. No, the interim patch was not in my tree. I confirmed that your commit "ARC: dw2 unwind: don't force dwarf 2" is indeed necessary to suppress the .debug_* sections when CONFIG_DEBUG_INFO is off. But again, we're stripping .ko files anyways before installing. > I'm not planning to carry it and would prefer addressing the the root cause by > removing the -gdwarf-2 toggle. I've added that and pushed rebased series. Care to > take it for a respin please. I downloaded your latest commit e47305af57d7eedc10b4720e604d669b10c69e3b and verified that stack traces are properly displayed for code inside kernel modules as well as vmlinux. I also called memcpy() on some bad address and got a proper stack trace that involved memcpy(). I conclude that unwinding works for us. Thank You Daniel
