Re: [PATCH v4 0/7] x86/boot: Remove runtime relocations from compressed kernel

Sedat Dilek
2020-07-14T18:30:34Z

> I did a full new build...
>
> ...and it fails with ld.lld-11 as linker:
>
> ld.lld-11 -m elf_x86_64 -pie --no-dynamic-linker -r -o
> arch/x86/boot/compressed/.tmp_misc.o arch/x86/boot/compressed/misc.o
> -T arch/x86/boot/compressed/.tmp_misc.ver; mv -f
> arch/x86/boot/compressed/.tmp_misc.o arch/x86/boot/compressed/misc.o;
> rm -f arch/x86/boot/compressed/.tmp_misc.ver; fi
> *** ld.lld-11: error: -r and -pie may not be used together ***
> make[5]: *** [scripts/Makefile.build:281:
> arch/x86/boot/compressed/misc.o] Error 1
>
> It's annoying to fail on the last minutes of a build.
> Sorry for being very honest.
>

I applied this diff...

$ git diff arch/x86/boot/compressed/Makefile
diff --git a/arch/x86/boot/compressed/Makefile
b/arch/x86/boot/compressed/Makefile
index 789d5d14d8b0..9ba52a656838 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -51,7 +51,10 @@ UBSAN_SANITIZE :=n
KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE)
# Compressed kernel should be built as PIE since it may be loaded at any
# address by the bootloader.
+# LLD linker does not allow -r and -pie options to be used together.
+ifndef CONFIG_LD_IS_LLD
KBUILD_LDFLAGS += -pie $(call ld-option, --no-dynamic-linker)
+endif
LDFLAGS_vmlinux := -T

hostprogs := mkpiggy

...and was able to build, assemble, link arch/x86/boot/compressed/*.

- Sedat -