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Message-ID: <20250408085254.836788-10-ardb+git@google.com> Date: Tue, 8 Apr 2025 10:52:56 +0200 From: Ard Biesheuvel <ardb+git@...gle.com> To: linux-efi@...r.kernel.org Cc: x86@...nel.org, mingo@...nel.org, linux-kernel@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>, Tom Lendacky <thomas.lendacky@....com>, Dionna Amalie Glaze <dionnaglaze@...gle.com>, Kevin Loughlin <kevinloughlin@...gle.com> Subject: [PATCH v3 1/7] x86/boot/startup: Disable objtool validation for library code From: Ard Biesheuvel <ardb@...nel.org> The library code built under arch/x86/boot/startup is not intended to be linked into vmlinux but only into the decompressor and/or the EFI stub. This means objtool validation is not needed here, and may result in false positive errors for things like missing retpolines. So disable it for all objects added to lib-y Signed-off-by: Ard Biesheuvel <ardb@...nel.org> --- arch/x86/boot/startup/Makefile | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/boot/startup/Makefile b/arch/x86/boot/startup/Makefile index 73946a3f6b3b..8919a1cbcb5a 100644 --- a/arch/x86/boot/startup/Makefile +++ b/arch/x86/boot/startup/Makefile @@ -4,3 +4,9 @@ KBUILD_AFLAGS += -D__DISABLE_EXPORTS lib-$(CONFIG_X86_64) += la57toggle.o lib-$(CONFIG_EFI_MIXED) += efi-mixed.o + +# +# Disable objtool validation for all library code, which is intended +# to be linked into the decompressor or the EFI stub but not vmlinux +# +$(patsubst %.o,$(obj)/%.o,$(lib-y)): OBJECT_FILES_NON_STANDARD := y -- 2.49.0.504.g3bcea36a83-goog
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