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Commit 3d6a7b99 authored by Andrew Pinski's avatar Andrew Pinski Committed by Catalin Marinas
Browse files

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: default avatarAndrew Pinski <Andrew.Pinski@caviumnetworks.com>
Signed-off-by: default avatarPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: default avatarChristoph Muellner <christoph.muellner@theobroma-systems.com>
Signed-off-by: default avatarYury Norov <ynorov@caviumnetworks.com>
Reviewed-by: default avatarDavid Daney <ddaney@caviumnetworks.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent c73cc120

arch/arm64/Makefile

+5 −0
Original line number Original line 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_CFLAGS	+= $(call cc-option, -mpc-relative-literal-loads)

KBUILD_AFLAGS	+= $(lseinstr) $(brokengasinst)

KBUILD_AFLAGS	+= $(lseinstr) $(brokengasinst)





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

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



ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)

ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)

KBUILD_CPPFLAGS	+= -mbig-endian

KBUILD_CPPFLAGS	+= -mbig-endian

CHECKFLAGS	+= -D__AARCH64EB__

CHECKFLAGS	+= -D__AARCH64EB__

AS		+= -EB

AS		+= -EB

LD		+= -EB

LD		+= -EB

LDFLAGS		+= -maarch64linuxb

UTS_MACHINE	:= aarch64_be

UTS_MACHINE	:= aarch64_be

else

else

KBUILD_CPPFLAGS	+= -mlittle-endian

KBUILD_CPPFLAGS	+= -mlittle-endian

CHECKFLAGS	+= -D__AARCH64EL__

CHECKFLAGS	+= -D__AARCH64EL__

AS		+= -EL

AS		+= -EL

LD		+= -EL

LD		+= -EL

LDFLAGS		+= -maarch64linux

UTS_MACHINE	:= aarch64

UTS_MACHINE	:= aarch64

endif

endif