[PATCH v6 02/21] arm64: ensure the kernel is compiled for LP64

Yury Norov
2016-01-14T17:24:09Z

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).

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>
---
arch/arm64/Makefile | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index cd822d8..d6668a8 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