Commit 3d6a7b99 authored Sep 18, 2017 by Andrew Pinski Committed by Catalin Marinas Sep 18, 2017

arm64: ensure the kernel is compiled for LP64



The kernel needs to be compiled as a LP64 binary for ARM64, even when
using a compiler that defaults to code-generation for the ILP32 ABI.
Consequently, we need to explicitly pass '-mabi=lp64' (supported on
gcc-4.9 and newer).

Signed-off-by: Andrew Pinski <Andrew.Pinski@caviumnetworks.com>
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Reviewed-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

parent c73cc120

arch/arm64/Makefile

+5 −0

Original line number	Diff line number	Diff line
		@@ -50,17 +50,22 @@ KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
		KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
		KBUILD_AFLAGS += $(lseinstr) $(brokengasinst)

		KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)
		KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)

		ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
		KBUILD_CPPFLAGS += -mbig-endian
		CHECKFLAGS += -D__AARCH64EB__
		AS += -EB
		LD += -EB
		LDFLAGS += -maarch64linuxb
		UTS_MACHINE := aarch64_be
		else
		KBUILD_CPPFLAGS += -mlittle-endian
		CHECKFLAGS += -D__AARCH64EL__
		AS += -EL
		LD += -EL
		LDFLAGS += -maarch64linux
		UTS_MACHINE := aarch64
		endif

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