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[v4,02/24] arm64: ensure the kernel is compiled for LP64

Message ID dd9e3bcebfe639ac9789bad8a02de016bf8b9af0.1428953303.git.philipp.tomsich@theobroma-systems.com (mailing list archive)
State New, archived
Headers show

Commit Message

Philipp Tomsich April 13, 2015, 7:44 p.m. UTC 
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: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
---
 arch/arm64/Makefile | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 69ceedc..2ad0c34 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -18,14 +18,18 @@  GZFLAGS		:=-9
 KBUILD_DEFCONFIG := defconfig
 
 KBUILD_CFLAGS	+= -mgeneral-regs-only
+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__