On 22 May 2018 at 00:55, John Knight <john.kni...@belkin.com> wrote: > Hi, > > > > I am trying to get libunwind to work on an ARM processor running an older > version of linx (version 3.14.77). I am wondering if there are any > particular requirements of the Linux kernel or supporting libraries that > would prohibit me from running on this older kernel? If so, what is the > minimum kernel version required for libunwind?
I don't think it has any special kernel dependencies unless you're going to a really old kernel version (?). I'm using libunwind with 3.10. > > This kernel does NOT have support of backtrace()… my understanding is that > support came with glibc in version 3.2 which had kernel support for it. The > lack of a backtrace has led me to try and use libunwind as an alternative to > give me a stack backtrace when my program SEG faults. I didn't think backtrace was a kernel feature - doesn't it live in glibc? And uses unwind tables generated by gcc/g++ together with the unwinding code in libstdc++ (as per the ABI). If you're using glibc's backtrace() with unwind tables rather than frame pointer unwinding then you'll need a gcc that's new enough to generate it (and enable generation). That's been mostly there for a decade or more, but I think a bug was fixed recently (gcc 4.9.4/5.2 timeframe) for some obscure corner-cases. But back to your question, I think the oldest kernel version I've used libunwind with is 3.0 with glibc=2.18 and gcc=4.9. Luke _______________________________________________ Libunwind-devel mailing list Libunwind-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/libunwind-devel
