On Sat, Aug 15, 2020 at 5:28 AM Sedat Dilek <sedat.di...@gmail.com> wrote: > > On Sat, Aug 15, 2020 at 2:27 AM Nick Desaulniers > <ndesaulni...@google.com> wrote: > > > > On Fri, Aug 14, 2020 at 3:57 PM Nick Desaulniers > > <ndesaulni...@google.com> wrote: > > > > > > On Fri, Aug 14, 2020 at 2:19 PM Sedat Dilek <sedat.di...@gmail.com> wrote: > > > > > > > > On Fri, Aug 14, 2020 at 7:29 PM Sedat Dilek <sedat.di...@gmail.com> > > > > wrote: > > > > > > > > > > Thanks for the proposal. > > > > > > > > > > I have adapted it to fit my patchset against Linux v5.8. > > > > > > > > > > Both Debian's GCC-10 and a snapshot version of LLVM toolchain > > > > > v11.0.0-rc1+ seems to be OK. > > > > > > > > > > > > > Yupp, OK. > > > > > > > > I was able to boot FreeDOS 1.2 VM in VirtualBox GUI. > > > > > > Hi Sedat, > > > Apologies, but it's not clear to me precisely which patch you tested. > > > Can you please confirm whether you tested: > > > 1. Arnd's patch that started this thread. > > > 2. My proposed diff adding -fno-addrsig to CFLAGS_powernow-k6.o. > > > 3. My proposed diff removing __force_order from the kernel. > > > > > > I'm hoping you were referring to testing 3., but it's not clear to me. > > > > Ah, sorry, I missed your comment on github: > > https://github.com/ClangBuiltLinux/linux/issues/1120#issuecomment-674282107 > > > > Ok, I will look at more disassembly next week and hopefully have a > > patch ready, with your tested by tag. > > > > Sorry for not being precise - I tested with solution (3.). > Later I added the diff I used as mentioned in your above comment. > > See [1]: > > > In a 2nd run building with a selfmade clang-11 and LLVM "bin"utils is fine, > > too. > > I cannot say much to older versions of GCC and/or LLVM/Clang if > removing "__force_order" works fine. > > Another (4.) solution: > Sami tried successfully by adding "__weak" declaration with > CONFIG_LKDTM=m (see [2]). > I am OK if this works, too. > > Please, see my attachments. > > - Sedat - > > [1] > https://github.com/ClangBuiltLinux/linux/issues/1120#issuecomment-674340760 > [2] > https://github.com/ClangBuiltLinux/linux/issues/1120#issuecomment-674182703
Unfortunately, the diff from Sami does not work together with Arvind's patchset... x86/boot: Remove run-time relocations from compressed kernel ...which got included in <tip.git#x86/boot> recently. I see the following: ld.lld-11 -m elf_x86_64 -pie --no-dynamic-linker -T arch/x86/boot/compressed/vmlinux.lds arch/x86/boot/compressed/kernel_info.o arch/x86/boot/compressed/head_64.o arch/x86/boot/compressed/misc.o arch/x86/boot/compressed/string.o arch/x86/boot/compressed/cmdline.o arch/x86/boot/compressed/error.o arch/x86/boot/compressed/piggy.o arch/x86/boot/compressed/cpuflags.o arch/x86/boot/compressed/early_serial_console.o arch/x86/boot/compressed/kaslr.o arch/x86/boot/compressed/kaslr_64.o arch/x86/boot/compressed/mem_encrypt.o arch/x86/boot/compressed/pgtable_64.o arch/x86/boot/compressed/acpi.o arch/x86/boot/compressed/efi_thunk_64.o drivers/firmware/efi/libstub/lib.a -o arch/x86/boot/compressed/vmlinux ld.lld-11: error: Unexpected GOT entries detected! ld.lld-11: error: Unexpected run-time relocations detected! ld.lld-11: error: Unexpected GOT entries detected! ld.lld-11: error: Unexpected run-time relocations detected! make[5]: *** [arch/x86/boot/compressed/Makefile:91: arch/x86/boot/compressed/vmlinux] Error 1 When you need further informations, please let me know. - Sedat - [1] https://github.com/ClangBuiltLinux/linux/issues/1120#issuecomment-674182703