From: Yury Norov <ynorov@caviumnetworks.com>
To: <arnd@arndb.de>, <catalin.marinas@arm.com>,
        <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>
CC: <ynorov@caviumnetworks.com>, <pinskia@gmail.com>,
        <Prasun.Kapoor@caviumnetworks.com>, <schwab@suse.de>,
        <Nathan_Lynch@mentor.com>, <agraf@suse.de>, <klimov.linux@gmail.com>,
        <broonie@kernel.org>, <jan.dakinevich@gmail.com>,
        <ddaney.cavm@gmail.com>, <bamvor.zhangjian@huawei.com>,
        <philipp.tomsich@theobroma-systems.com>, <joseph@codesourcery.com>,
        <christoph.muellner@theobroma-systems.com>,
        Andrew Pinski <apinski@cavium.com>,
        Andrew Pinski <Andrew.Pinski@caviumnetworks.com>
Subject: [PATCH v6 02/20] arm64: ensure the kernel is compiled for LP64
Date: Wed, 16 Dec 2015 00:42:28 +0300
Message-ID: <1450215766-14765-3-git-send-email-ynorov@caviumnetworks.com>
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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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