UPSTREAM: x86/build: Keep local relocations with ld.lld
The LLVM linker (ld.lld) defaults to removing local relocations, which causes KASLR boot failures. ld.bfd and ld.gold already handle this correctly. This adds the explicit instruction "--discard-none" during the link phase. There is no change in output for ld.bfd and ld.gold, but ld.lld now produces an image with all the needed relocations. Signed-off-by:Kees Cook <keescook@chromium.org> Signed-off-by:
Borislav Petkov <bp@suse.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: clang-built-linux@googlegroups.com Cc: x86-ml <x86@kernel.org> Link: https://lkml.kernel.org/r/20190404214027.GA7324@beast Link: https://github.com/ClangBuiltLinux/linux/issues/404 Change-Id: If16af606aee95770bee98fc662867115b3a8572a (cherry picked from commit 7c21383f3429dd70da39c0c7f1efa12377a47ab6) Signed-off-by:
Sami Tolvanen <samitolvanen@google.com>
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