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    Subject[PATCH v6 02/20] arm64: ensure the kernel is compiled for LP64
    Date
    From: Andrew Pinski <apinski@cavium.com>

    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).

    Reviewed-by: David Daney <ddaney@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>
    Signed-off-by: Andrew Pinski <Andrew.Pinski@caviumnetworks.com>
    ---
    arch/arm64/Makefile | 5 +++++
    1 file changed, 5 insertions(+)

    diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
    index d10b5d4..432b69a 100644
    --- a/arch/arm64/Makefile
    +++ b/arch/arm64/Makefile
    @@ -29,14 +29,19 @@ endif
    KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr)
    KBUILD_AFLAGS += $(lseinstr)

    +KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)
    +KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)
    +
    ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
    KBUILD_CPPFLAGS += -mbig-endian
    AS += -EB
    LD += -EB
    +LDFLAGS += -maarch64linuxb
    else
    KBUILD_CPPFLAGS += -mlittle-endian
    AS += -EL
    LD += -EL
    +LDFLAGS += -maarch64linux
    endif

    CHECKFLAGS += -D__aarch64__
    --
    2.5.0


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