arch/arm64/Makefile - kernel/msm - Git at Google

 #
 # arch/arm64/Makefile
 #
 # This file is included by the global makefile so that you can add your own
 # architecture-specific flags and dependencies.
 #
 # This file is subject to the terms and conditions of the GNU General Public
 # License.  See the file "COPYING" in the main directory of this archive
 # for more details.
 #
 # Copyright (C) 1995-2001 by Russell King

 LDFLAGS_vmlinux	:=-p --no-undefined -X
 CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
 OBJCOPYFLAGS	:=-O binary -R .note -R .note.gnu.build-id -R .comment -S
 GZFLAGS		:=-9

 ifeq ($(CONFIG_RELOCATABLE), y)
 LDFLAGS_vmlinux		+= -pie -Bsymbolic \
 			$(call ld-option, --no-apply-dynamic-relocs)
 endif

 ifeq ($(CONFIG_ARM64_ERRATUM_843419),)
 # https://sourceware.org/bugzilla/show_bug.cgi?id=21491
 LDFLAGS_GOLD	+= --no-fix-cortex-a53-843419
 endif

 KBUILD_DEFCONFIG := defconfig

 # Check for binutils support for specific extensions
 lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)

 ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
   ifeq ($(lseinstr),)
 $(warning LSE atomics not supported by binutils)
   endif
 endif

 ifeq ($(CONFIG_COMPAT_VDSO), y)
   CROSS_COMPILE_ARM32 ?= $(CONFIG_CROSS_COMPILE_ARM32:"%"=%)

   # Check that the user has provided a valid prefix for the 32-bit toolchain.
   # To prevent selecting the system $(cc-name) by default, the prefix is not
   # allowed to be empty, unlike CROSS_COMPILE. In the unlikely event that the
   # system $(cc-name) is actually the 32-bit ARM compiler to be used, the
   # variable can be set to the dirname (e.g. CROSS_COMPILE_ARM32=/usr/bin/).
   # Note: this Makefile is read both before and after regenerating the config
   # (if needed). Any warning appearing before the config has been regenerated
   # should be ignored. If the error is triggered and you set
   # CONFIG_CROSS_COMPILE_ARM32, set CROSS_COMPILE_ARM32 to an appropriate value
   # when invoking make and fix CONFIG_CROSS_COMPILE_ARM32.
   ifeq ($(CROSS_COMPILE_ARM32),)
     $(error CROSS_COMPILE_ARM32 not defined or empty, the compat vDSO will not be built)
   else ifeq ($(cc-name),clang)
     export CLANG_TRIPLE_ARM32 ?= $(CROSS_COMPILE_ARM32)
     export CLANG_TARGET_ARM32 := --target=$(notdir $(CLANG_TRIPLE_ARM32:%-=%))
     export CONFIG_VDSO32 := y
     vdso32 := -DCONFIG_VDSO32=1
   else ifeq ($(shell which $(CROSS_COMPILE_ARM32)$(cc-name) 2> /dev/null),)
     $(error $(CROSS_COMPILE_ARM32)$(cc-name) not found, check CROSS_COMPILE_ARM32)
   else
     export CROSS_COMPILE_ARM32
     export CONFIG_VDSO32 := y
     vdso32 := -DCONFIG_VDSO32=1
   endif
 endif

 ifeq ($(cc-name),clang)
 KBUILD_CFLAGS	+= -mno-implicit-float
 else
 KBUILD_CFLAGS	+= -mgeneral-regs-only
 endif
 KBUILD_CFLAGS	+= $(lseinstr) $(vdso32)
 KBUILD_CFLAGS	+= -fno-pic
 KBUILD_CFLAGS	+= $(call cc-option, -mpc-relative-literal-loads)
 KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables
 KBUILD_AFLAGS	+= $(lseinstr) $(vdso32)

 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
 KBUILD_CPPFLAGS	+= -mbig-endian
 AS		+= -EB
 LD		+= -EB
 else
 KBUILD_CPPFLAGS	+= -mlittle-endian
 AS		+= -EL
 LD		+= -EL
 endif

 CHECKFLAGS	+= -D__aarch64__

 ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
 KBUILD_CFLAGS_MODULE	+= -mcmodel=large
 endif

 ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
 KBUILD_LDFLAGS_MODULE	+= -T $(srctree)/arch/arm64/kernel/module.lds
 endif

 # Default value
 head-y		:= arch/arm64/kernel/head.o

 # The byte offset of the kernel image in RAM from the start of RAM.
 ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
 TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%03x000\n", int(512 * rand())}')
 else
 TEXT_OFFSET := 0x00080000
 endif

 # KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
 # in 32-bit arithmetic
 KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
 			(0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
 			+ (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \
 			- (1 << (64 - 32 - 3)) )) )

 export	TEXT_OFFSET GZFLAGS

 core-y		+= arch/arm64/kernel/ arch/arm64/mm/
 core-$(CONFIG_NET) += arch/arm64/net/
 core-$(CONFIG_KVM) += arch/arm64/kvm/
 core-$(CONFIG_XEN) += arch/arm64/xen/
 core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
 libs-y		:= arch/arm64/lib/ $(libs-y)
 core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a

 suffix_$(CONFIG_KERNEL_GZIP) = gz
 suffix_$(CONFIG_KERNEL_LZ4)  = lz4

 # Default target when executing plain make
 ifeq ($(CONFIG_BUILD_ARM64_APPENDED_DTB_IMAGE),y)
 KBUILD_IMAGE	:= Image.$(suffix_y)-dtb
 else
 KBUILD_IMAGE	:= Image.$(suffix_y)
 endif

 KBUILD_DTBS	:= dtbs

 KBUILD_DTBO_IMG := dtbo.img

 ifeq ($(CONFIG_BUILD_ARM64_APPLY_DTBO),y)
 	KBUILD_APPLY_DTBO := apply_dtbo
 endif

 BUILD_DTC_PATH = $(subst $\",,$(CONFIG_BUILD_ARM64_DTC))
 ifneq ($(BUILD_DTC_PATH),)
 	DTC = $(BUILD_DTC_PATH)
 endif

 BUILD_DTC_FLAGS = $(subst $\",,$(CONFIG_BUILD_ARM64_DTC_FLAGS))
 ifneq ($(BUILD_DTC_FLAGS),)
 	DTC_FLAGS += $(BUILD_DTC_FLAGS)
 endif

 all:	$(KBUILD_IMAGE) $(KBUILD_DTBS) $(KBUILD_DTBO_IMG) $(KBUILD_APPLY_DTBO)

 ifeq ($(CONFIG_BUILD_ARM64_DT_OVERLAY),y)
 export DTC_FLAGS := -@
 endif

 all:	$(KBUILD_IMAGE) $(KBUILD_DTBS)

 boot := arch/arm64/boot

 Image: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

 Image.%: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

 zinstall install: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) $@

 %.dtb: scripts
 	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@

 PHONY += dtbs dtbs_install

 dtbs: prepare scripts
 	$(Q)$(MAKE) $(build)=$(boot)/dts

 dtbs_install:
 	$(Q)$(MAKE) $(dtbinst)=$(boot)/dts

 Image-dtb Image.gz-dtb Image.lz4-dtb: vmlinux scripts dtbs
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

 dtbo.img: $(boot)/dts/dtboimg.cfg dtbs
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

 PHONY += apply_dtbo
 dtboaply := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.dtboaply obj
 apply_dtbo: $(KBUILD_IMAGE) dtbo.img
 	$(Q)$(MAKE) $(dtboaply)=$(boot) KERNEL_DTB=$(KBUILD_IMAGE) DTBO=dtbo.img

 PHONY += vdso_install
 vdso_install:
 	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@

 # We use MRPROPER_FILES and CLEAN_FILES now
 archclean:
 	$(Q)$(MAKE) $(clean)=$(boot)
 	$(Q)$(MAKE) $(clean)=$(boot)/dts

 CLEAN_FILES += $(boot)/Image $(boot)/Image-dtb $(boot)/Image.* $(boot)/dtbo.img $(boot)/*.dtbc
 MRPROPER_FILES += $(boot)/Image $(boot)/Image-dtb $(boot)/Image.* $(boot)/dtbo.img $(boot)/*.dtbc

 # We need to generate vdso-offsets.h before compiling certain files in kernel/.
 # In order to do that, we should use the archprepare target, but we can't since
 # asm-offsets.h is included in some files used to generate vdso-offsets.h, and
 # asm-offsets.h is built in prepare0, for which archprepare is a dependency.
 # Therefore we need to generate the header after prepare0 has been made, hence
 # this hack.
 prepare: vdso_prepare
 vdso_prepare: prepare0
 	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h
 	$(if $(CONFIG_VDSO32),$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 \
 					  include/generated/vdso32-offsets.h)

 define archhelp
   echo  '* Image.gz      - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
   echo  '* Image.lz4     - Compressed kernel image (arch/$(ARCH)/boot/Image.lz4)'
   echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
   echo  '* dtbs          - Build device tree blobs for enabled boards'
   echo  '  dtbs_install  - Install dtbs to $(INSTALL_DTBS_PATH)'
   echo  '  install       - Install uncompressed kernel'
   echo  '  zinstall      - Install compressed kernel'
   echo  '                  Install using (your) ~/bin/installkernel or'
   echo  '                  (distribution) /sbin/installkernel or'
   echo  '                  install to $$(INSTALL_PATH) and run lilo'
 endef
	#
	# arch/arm64/Makefile
	#
	# This file is included by the global makefile so that you can add your own
	# architecture-specific flags and dependencies.
	#
	# This file is subject to the terms and conditions of the GNU General Public
	# License. See the file "COPYING" in the main directory of this archive
	# for more details.
	#
	# Copyright (C) 1995-2001 by Russell King

	LDFLAGS_vmlinux :=-p --no-undefined -X
	CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
	OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
	GZFLAGS :=-9

	ifeq ($(CONFIG_RELOCATABLE), y)
	LDFLAGS_vmlinux += -pie -Bsymbolic \
	$(call ld-option, --no-apply-dynamic-relocs)
	endif

	ifeq ($(CONFIG_ARM64_ERRATUM_843419),)
	# https://sourceware.org/bugzilla/show_bug.cgi?id=21491
	LDFLAGS_GOLD += --no-fix-cortex-a53-843419
	endif

	KBUILD_DEFCONFIG := defconfig

	# Check for binutils support for specific extensions
	lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)

	ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
	ifeq ($(lseinstr),)
	$(warning LSE atomics not supported by binutils)
	endif
	endif

	ifeq ($(CONFIG_COMPAT_VDSO), y)
	CROSS_COMPILE_ARM32 ?= $(CONFIG_CROSS_COMPILE_ARM32:"%"=%)

	# Check that the user has provided a valid prefix for the 32-bit toolchain.
	# To prevent selecting the system $(cc-name) by default, the prefix is not
	# allowed to be empty, unlike CROSS_COMPILE. In the unlikely event that the
	# system $(cc-name) is actually the 32-bit ARM compiler to be used, the
	# variable can be set to the dirname (e.g. CROSS_COMPILE_ARM32=/usr/bin/).
	# Note: this Makefile is read both before and after regenerating the config
	# (if needed). Any warning appearing before the config has been regenerated
	# should be ignored. If the error is triggered and you set
	# CONFIG_CROSS_COMPILE_ARM32, set CROSS_COMPILE_ARM32 to an appropriate value
	# when invoking make and fix CONFIG_CROSS_COMPILE_ARM32.
	ifeq ($(CROSS_COMPILE_ARM32),)
	$(error CROSS_COMPILE_ARM32 not defined or empty, the compat vDSO will not be built)
	else ifeq ($(cc-name),clang)
	export CLANG_TRIPLE_ARM32 ?= $(CROSS_COMPILE_ARM32)
	export CLANG_TARGET_ARM32 := --target=$(notdir $(CLANG_TRIPLE_ARM32:%-=%))
	export CONFIG_VDSO32 := y
	vdso32 := -DCONFIG_VDSO32=1
	else ifeq ($(shell which $(CROSS_COMPILE_ARM32)$(cc-name) 2> /dev/null),)
	$(error $(CROSS_COMPILE_ARM32)$(cc-name) not found, check CROSS_COMPILE_ARM32)
	else
	export CROSS_COMPILE_ARM32
	export CONFIG_VDSO32 := y
	vdso32 := -DCONFIG_VDSO32=1
	endif
	endif

	ifeq ($(cc-name),clang)
	KBUILD_CFLAGS += -mno-implicit-float
	else
	KBUILD_CFLAGS += -mgeneral-regs-only
	endif
	KBUILD_CFLAGS += $(lseinstr) $(vdso32)
	KBUILD_CFLAGS += -fno-pic
	KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
	KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
	KBUILD_AFLAGS += $(lseinstr) $(vdso32)

	ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
	KBUILD_CPPFLAGS += -mbig-endian
	AS += -EB
	LD += -EB
	else
	KBUILD_CPPFLAGS += -mlittle-endian
	AS += -EL
	LD += -EL
	endif

	CHECKFLAGS += -D__aarch64__

	ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
	KBUILD_CFLAGS_MODULE += -mcmodel=large
	endif

	ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
	KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds
	endif

	# Default value
	head-y := arch/arm64/kernel/head.o

	# The byte offset of the kernel image in RAM from the start of RAM.
	ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
	TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%03x000\n", int(512 * rand())}')
	else
	TEXT_OFFSET := 0x00080000
	endif

	# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
	# in 32-bit arithmetic
	KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
	(0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
	+ (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \
	- (1 << (64 - 32 - 3)) )) )

	export TEXT_OFFSET GZFLAGS

	core-y += arch/arm64/kernel/ arch/arm64/mm/
	core-$(CONFIG_NET) += arch/arm64/net/
	core-$(CONFIG_KVM) += arch/arm64/kvm/
	core-$(CONFIG_XEN) += arch/arm64/xen/
	core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
	libs-y := arch/arm64/lib/ $(libs-y)
	core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a

	suffix_$(CONFIG_KERNEL_GZIP) = gz
	suffix_$(CONFIG_KERNEL_LZ4) = lz4

	# Default target when executing plain make
	ifeq ($(CONFIG_BUILD_ARM64_APPENDED_DTB_IMAGE),y)
	KBUILD_IMAGE := Image.$(suffix_y)-dtb
	else
	KBUILD_IMAGE := Image.$(suffix_y)
	endif

	KBUILD_DTBS := dtbs

	KBUILD_DTBO_IMG := dtbo.img

	ifeq ($(CONFIG_BUILD_ARM64_APPLY_DTBO),y)
	KBUILD_APPLY_DTBO := apply_dtbo
	endif

	BUILD_DTC_PATH = $(subst $\",,$(CONFIG_BUILD_ARM64_DTC))
	ifneq ($(BUILD_DTC_PATH),)
	DTC = $(BUILD_DTC_PATH)
	endif

	BUILD_DTC_FLAGS = $(subst $\",,$(CONFIG_BUILD_ARM64_DTC_FLAGS))
	ifneq ($(BUILD_DTC_FLAGS),)
	DTC_FLAGS += $(BUILD_DTC_FLAGS)
	endif

	all: $(KBUILD_IMAGE) $(KBUILD_DTBS) $(KBUILD_DTBO_IMG) $(KBUILD_APPLY_DTBO)

	ifeq ($(CONFIG_BUILD_ARM64_DT_OVERLAY),y)
	export DTC_FLAGS := -@
	endif

	all: $(KBUILD_IMAGE) $(KBUILD_DTBS)

	boot := arch/arm64/boot

	Image: vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

	Image.%: vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

	zinstall install: vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $@

	%.dtb: scripts
	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@

	PHONY += dtbs dtbs_install

	dtbs: prepare scripts
	$(Q)$(MAKE) $(build)=$(boot)/dts

	dtbs_install:
	$(Q)$(MAKE) $(dtbinst)=$(boot)/dts

	Image-dtb Image.gz-dtb Image.lz4-dtb: vmlinux scripts dtbs
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

	dtbo.img: $(boot)/dts/dtboimg.cfg dtbs
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

	PHONY += apply_dtbo
	dtboaply := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.dtboaply obj
	apply_dtbo: $(KBUILD_IMAGE) dtbo.img
	$(Q)$(MAKE) $(dtboaply)=$(boot) KERNEL_DTB=$(KBUILD_IMAGE) DTBO=dtbo.img

	PHONY += vdso_install
	vdso_install:
	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@

	# We use MRPROPER_FILES and CLEAN_FILES now
	archclean:
	$(Q)$(MAKE) $(clean)=$(boot)
	$(Q)$(MAKE) $(clean)=$(boot)/dts

	CLEAN_FILES += $(boot)/Image $(boot)/Image-dtb $(boot)/Image.* $(boot)/dtbo.img $(boot)/*.dtbc
	MRPROPER_FILES += $(boot)/Image $(boot)/Image-dtb $(boot)/Image.* $(boot)/dtbo.img $(boot)/*.dtbc

	# We need to generate vdso-offsets.h before compiling certain files in kernel/.
	# In order to do that, we should use the archprepare target, but we can't since
	# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
	# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
	# Therefore we need to generate the header after prepare0 has been made, hence
	# this hack.
	prepare: vdso_prepare
	vdso_prepare: prepare0
	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h
	$(if $(CONFIG_VDSO32),$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 \
	include/generated/vdso32-offsets.h)

	define archhelp
	echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
	echo '* Image.lz4 - Compressed kernel image (arch/$(ARCH)/boot/Image.lz4)'
	echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
	echo '* dtbs - Build device tree blobs for enabled boards'
	echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
	echo ' install - Install uncompressed kernel'
	echo ' zinstall - Install compressed kernel'
	echo ' Install using (your) ~/bin/installkernel or'
	echo ' (distribution) /sbin/installkernel or'
	echo ' install to $$(INSTALL_PATH) and run lilo'
	endef