On Fri, Nov 09, 2018 at 02:50:27PM +0100, Ard Biesheuvel wrote: > On 9 November 2018 at 08:28, Ingo Molnar <mi...@kernel.org> wrote: > >> - I'm not sure about the objtool approach. Objtool is (currently) > >> x86-64 only, which means we have to use the "unoptimized" version > >> everywhere else. I may experiment with a GCC plugin instead. > > > > I'd prefer the objtool approach. It's a pretty reliable first-principles > > approach while GCC plugin would have to be replicated for Clang and any > > other compilers, etc. > > > > I implemented the GCC plugin approach here for arm64
I'm confused; I though we only needed objtool for variable instruction length architectures, because we can't reliably decode our instruction stream. Otherwise we can fairly trivially use the DWARF relocation data, no?
