[PATCH v5 02/23] arm64: ensure the kernel is compiled for LP64
From: Yury Norov <hidden>
Date: 2015-09-29 22:15:23
Also in:
lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
From: Andrew Pinski <redacted> 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 <redacted> Signed-off-by: Christoph Muellner <redacted> Signed-off-by: Yury Norov <redacted>
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index f9914d7..d7a13ce 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile@@ -15,7 +15,6 @@ CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET) OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S GZFLAGS :=-9 -KBUILD_DEFCONFIG := defconfig # Check for binutils support for specific extensions lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)
@@ -29,14 +28,19 @@ 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__
--
2.1.4