arch/x86/Makefile - nest-guard/1.0/linux-imx - Git at Google


            
            # Unified Makefile for i386 and x86_64


            # select defconfig based on actual architecture

            
            ifeq ($(ARCH),x86)

            
              ifeq ($(shell uname -m),x86_64)

            
                    KBUILD_DEFCONFIG := x86_64_defconfig

            
              else

            
                    KBUILD_DEFCONFIG := i386_defconfig

            
              endif

            
            else

            
                    KBUILD_DEFCONFIG := $(ARCH)_defconfig

            
            endif


            # How to compile the 16-bit code.  Note we always compile for -march=i386;

            
            # that way we can complain to the user if the CPU is insufficient.

            
            #

            
            # The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For

            
            # older versions of GCC, include an *assembly* header to make sure that

            
            # gcc doesn't play any games behind our back.

            
            CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h

            
            M16_CFLAGS	 := $(call cc-option, -m16, $(CODE16GCC_CFLAGS))


            REALMODE_CFLAGS	:= $(M16_CFLAGS) -g -Os -D__KERNEL__ \

            
            		   -DDISABLE_BRANCH_PROFILING \

            
            		   -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \

            
            		   -fno-strict-aliasing -fomit-frame-pointer -fno-pic \

            
            		   -mno-mmx -mno-sse \

            
            		   $(call cc-option, -ffreestanding) \

            
            		   $(call cc-option, -fno-stack-protector) \

            
            		   $(call cc-option, -mpreferred-stack-boundary=2)

            
            export REALMODE_CFLAGS


            # BITS is used as extension for files which are available in a 32 bit

            
            # and a 64 bit version to simplify shared Makefiles.

            
            # e.g.: obj-y += foo_$(BITS).o

            
            export BITS


            ifdef CONFIG_X86_NEED_RELOCS

            
                    LDFLAGS_vmlinux := --emit-relocs

            
            endif


            ifeq ($(CONFIG_X86_32),y)

            
                    BITS := 32

            
                    UTS_MACHINE := i386

            
                    CHECKFLAGS += -D__i386__


                    biarch := $(call cc-option,-m32)

            
                    KBUILD_AFLAGS += $(biarch)

            
                    KBUILD_CFLAGS += $(biarch)


                    KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return


                    # Never want PIC in a 32-bit kernel, prevent breakage with GCC built

            
                    # with nonstandard options

            
                    KBUILD_CFLAGS += -fno-pic


                    # prevent gcc from keeping the stack 16 byte aligned

            
                    KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)


                    # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use

            
                    # a lot more stack due to the lack of sharing of stacklots:

            
                    KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \

            
            				$(call cc-option,-fno-unit-at-a-time))


                    # CPU-specific tuning. Anything which can be shared with UML should go here.

            
                    include arch/x86/Makefile_32.cpu

            
                    KBUILD_CFLAGS += $(cflags-y)


                    # temporary until string.h is fixed

            
                    KBUILD_CFLAGS += -ffreestanding

            
            else

            
                    BITS := 64

            
                    UTS_MACHINE := x86_64

            
                    CHECKFLAGS += -D__x86_64__ -m64


                    biarch := -m64

            
                    KBUILD_AFLAGS += -m64

            
                    KBUILD_CFLAGS += -m64


                    # Don't autogenerate traditional x87 instructions

            
                    KBUILD_CFLAGS += $(call cc-option,-mno-80387)

            
                    KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)


            	# Use -mpreferred-stack-boundary=3 if supported.

            
            	KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3)


                    # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)

            
                    cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)

            
                    cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)


                    cflags-$(CONFIG_MCORE2) += \

            
                            $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))

            
            	cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \

            
            		$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))

            
                    cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)

            
                    KBUILD_CFLAGS += $(cflags-y)


                    KBUILD_CFLAGS += -mno-red-zone

            
                    KBUILD_CFLAGS += -mcmodel=kernel


                    # -funit-at-a-time shrinks the kernel .text considerably

            
                    # unfortunately it makes reading oopses harder.

            
                    KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)


                    # this works around some issues with generating unwind tables in older gccs

            
                    # newer gccs do it by default

            
                    KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args)

            
            endif


            # Make sure compiler does not have buggy stack-protector support.

            
            ifdef CONFIG_CC_STACKPROTECTOR

            
            	cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh

            
                    ifneq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)

            
                            $(warning stack-protector enabled but compiler support broken)

            
                    endif

            
            endif


            ifdef CONFIG_X86_X32

            
            	x32_ld_ok := $(call try-run,\

            
            			/bin/echo -e '1: .quad 1b' | \

            
            			$(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \

            
            			$(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \

            
            			$(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n)

            
                    ifeq ($(x32_ld_ok),y)

            
                            CONFIG_X86_X32_ABI := y

            
                            KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI

            
                            KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI

            
                    else

            
                            $(warning CONFIG_X86_X32 enabled but no binutils support)

            
                    endif

            
            endif

            
            export CONFIG_X86_X32_ABI


            # Don't unroll struct assignments with kmemcheck enabled

            
            ifeq ($(CONFIG_KMEMCHECK),y)

            
            	KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy)

            
            endif


            # Stackpointer is addressed different for 32 bit and 64 bit x86

            
            sp-$(CONFIG_X86_32) := esp

            
            sp-$(CONFIG_X86_64) := rsp


            # do binutils support CFI?

            
            cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)

            
            # is .cfi_signal_frame supported too?

            
            cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)

            
            cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1)


            # does binutils support specific instructions?

            
            asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1)

            
            asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1)

            
            asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1)

            
            avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1)

            
            avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1)


            KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr)

            
            KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr)


            LDFLAGS := -m elf_$(UTS_MACHINE)


            # Speed up the build

            
            KBUILD_CFLAGS += -pipe

            
            # Workaround for a gcc prelease that unfortunately was shipped in a suse release

            
            KBUILD_CFLAGS += -Wno-sign-compare

            
            #

            
            KBUILD_CFLAGS += -fno-asynchronous-unwind-tables

            
            # prevent gcc from generating any FP code by mistake

            
            KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow

            
            KBUILD_CFLAGS += $(call cc-option,-mno-avx,)


            KBUILD_CFLAGS += $(mflags-y)

            
            KBUILD_AFLAGS += $(mflags-y)


            archscripts: scripts_basic

            
            	$(Q)$(MAKE) $(build)=arch/x86/tools relocs


            ###

            
            # Syscall table generation


            archheaders:

            
            	$(Q)$(MAKE) $(build)=arch/x86/syscalls all


            archprepare:

            
            ifeq ($(CONFIG_KEXEC_FILE),y)

            
            	$(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c

            
            endif


            ###

            
            # Kernel objects


            head-y := arch/x86/kernel/head_$(BITS).o

            
            head-y += arch/x86/kernel/head$(BITS).o

            
            head-y += arch/x86/kernel/head.o


            libs-y  += arch/x86/lib/


            # See arch/x86/Kbuild for content of core part of the kernel

            
            core-y += arch/x86/


            # drivers-y are linked after core-y

            
            drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/

            
            drivers-$(CONFIG_PCI)            += arch/x86/pci/


            # must be linked after kernel/

            
            drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/


            # suspend and hibernation support

            
            drivers-$(CONFIG_PM) += arch/x86/power/


            drivers-$(CONFIG_FB) += arch/x86/video/


            ####

            
            # boot loader support. Several targets are kept for legacy purposes


            boot := arch/x86/boot


            BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage


            PHONY += bzImage $(BOOT_TARGETS)


            # Default kernel to build

            
            all: bzImage


            # KBUILD_IMAGE specify target image being built

            
            KBUILD_IMAGE := $(boot)/bzImage


            bzImage: vmlinux

            
            ifeq ($(CONFIG_X86_DECODER_SELFTEST),y)

            
            	$(Q)$(MAKE) $(build)=arch/x86/tools posttest

            
            endif

            
            	$(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)

            
            	$(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot

            
            	$(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@


            $(BOOT_TARGETS): vmlinux

            
            	$(Q)$(MAKE) $(build)=$(boot) $@


            PHONY += install

            
            install:

            
            	$(Q)$(MAKE) $(build)=$(boot) $@


            PHONY += vdso_install

            
            vdso_install:

            
            	$(Q)$(MAKE) $(build)=arch/x86/vdso $@


            archclean:

            
            	$(Q)rm -rf $(objtree)/arch/i386

            
            	$(Q)rm -rf $(objtree)/arch/x86_64

            
            	$(Q)$(MAKE) $(clean)=$(boot)

            
            	$(Q)$(MAKE) $(clean)=arch/x86/tools

            
            	$(Q)$(MAKE) $(clean)=arch/x86/purgatory


            define archhelp

            
              echo  '* bzImage      - Compressed kernel image (arch/x86/boot/bzImage)'

            
              echo  '  install      - Install kernel using'

            
              echo  '                  (your) ~/bin/$(INSTALLKERNEL) or'

            
              echo  '                  (distribution) /sbin/$(INSTALLKERNEL) or'

            
              echo  '                  install to $$(INSTALL_PATH) and run lilo'

            
              echo  '  fdimage      - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'

            
              echo  '  fdimage144   - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'

            
              echo  '  fdimage288   - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'

            
              echo  '  isoimage     - Create a boot CD-ROM image (arch/x86/boot/image.iso)'

            
              echo  '                  bzdisk/fdimage*/isoimage also accept:'

            
              echo  '                  FDARGS="..."  arguments for the booted kernel'

            
              echo  '                  FDINITRD=file initrd for the booted kernel'

            
            endef
	# Unified Makefile for i386 and x86_64

	# select defconfig based on actual architecture
	ifeq ($(ARCH),x86)
	ifeq ($(shell uname -m),x86_64)
	KBUILD_DEFCONFIG := x86_64_defconfig
	else
	KBUILD_DEFCONFIG := i386_defconfig
	endif
	else
	KBUILD_DEFCONFIG := $(ARCH)_defconfig
	endif

	# How to compile the 16-bit code. Note we always compile for -march=i386;
	# that way we can complain to the user if the CPU is insufficient.
	#
	# The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For
	# older versions of GCC, include an assembly header to make sure that
	# gcc doesn't play any games behind our back.
	CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h
	M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS))

	REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -D__KERNEL__ \
	-DDISABLE_BRANCH_PROFILING \
	-Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
	-fno-strict-aliasing -fomit-frame-pointer -fno-pic \
	-mno-mmx -mno-sse \
	$(call cc-option, -ffreestanding) \
	$(call cc-option, -fno-stack-protector) \
	$(call cc-option, -mpreferred-stack-boundary=2)
	export REALMODE_CFLAGS

	# BITS is used as extension for files which are available in a 32 bit
	# and a 64 bit version to simplify shared Makefiles.
	# e.g.: obj-y += foo_$(BITS).o
	export BITS

	ifdef CONFIG_X86_NEED_RELOCS
	LDFLAGS_vmlinux := --emit-relocs
	endif

	ifeq ($(CONFIG_X86_32),y)
	BITS := 32
	UTS_MACHINE := i386
	CHECKFLAGS += -D__i386__

	biarch := $(call cc-option,-m32)
	KBUILD_AFLAGS += $(biarch)
	KBUILD_CFLAGS += $(biarch)

	KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return

	# Never want PIC in a 32-bit kernel, prevent breakage with GCC built
	# with nonstandard options
	KBUILD_CFLAGS += -fno-pic

	# prevent gcc from keeping the stack 16 byte aligned
	KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)

	# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
	# a lot more stack due to the lack of sharing of stacklots:
	KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \
	$(call cc-option,-fno-unit-at-a-time))

	# CPU-specific tuning. Anything which can be shared with UML should go here.
	include arch/x86/Makefile_32.cpu
	KBUILD_CFLAGS += $(cflags-y)

	# temporary until string.h is fixed
	KBUILD_CFLAGS += -ffreestanding
	else
	BITS := 64
	UTS_MACHINE := x86_64
	CHECKFLAGS += -D__x86_64__ -m64

	biarch := -m64
	KBUILD_AFLAGS += -m64
	KBUILD_CFLAGS += -m64

	# Don't autogenerate traditional x87 instructions
	KBUILD_CFLAGS += $(call cc-option,-mno-80387)
	KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)

	# Use -mpreferred-stack-boundary=3 if supported.
	KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3)

	# FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
	cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
	cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)

	cflags-$(CONFIG_MCORE2) += \
	$(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
	cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
	$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
	cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
	KBUILD_CFLAGS += $(cflags-y)

	KBUILD_CFLAGS += -mno-red-zone
	KBUILD_CFLAGS += -mcmodel=kernel

	# -funit-at-a-time shrinks the kernel .text considerably
	# unfortunately it makes reading oopses harder.
	KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)

	# this works around some issues with generating unwind tables in older gccs
	# newer gccs do it by default
	KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args)
	endif

	# Make sure compiler does not have buggy stack-protector support.
	ifdef CONFIG_CC_STACKPROTECTOR
	cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh
	ifneq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
	$(warning stack-protector enabled but compiler support broken)
	endif
	endif

	ifdef CONFIG_X86_X32
	x32_ld_ok := $(call try-run,\
	/bin/echo -e '1: .quad 1b' \| \
	$(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \
	$(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \
	$(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n)
	ifeq ($(x32_ld_ok),y)
	CONFIG_X86_X32_ABI := y
	KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI
	KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI
	else
	$(warning CONFIG_X86_X32 enabled but no binutils support)
	endif
	endif
	export CONFIG_X86_X32_ABI

	# Don't unroll struct assignments with kmemcheck enabled
	ifeq ($(CONFIG_KMEMCHECK),y)
	KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy)
	endif

	# Stackpointer is addressed different for 32 bit and 64 bit x86
	sp-$(CONFIG_X86_32) := esp
	sp-$(CONFIG_X86_64) := rsp

	# do binutils support CFI?
	cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
	# is .cfi_signal_frame supported too?
	cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
	cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1)

	# does binutils support specific instructions?
	asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1)
	asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1)
	asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1)
	avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1)
	avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1)

	KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr)
	KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr)

	LDFLAGS := -m elf_$(UTS_MACHINE)

	# Speed up the build
	KBUILD_CFLAGS += -pipe
	# Workaround for a gcc prelease that unfortunately was shipped in a suse release
	KBUILD_CFLAGS += -Wno-sign-compare
	#
	KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
	# prevent gcc from generating any FP code by mistake
	KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
	KBUILD_CFLAGS += $(call cc-option,-mno-avx,)

	KBUILD_CFLAGS += $(mflags-y)
	KBUILD_AFLAGS += $(mflags-y)

	archscripts: scripts_basic
	$(Q)$(MAKE) $(build)=arch/x86/tools relocs

	###
	# Syscall table generation

	archheaders:
	$(Q)$(MAKE) $(build)=arch/x86/syscalls all

	archprepare:
	ifeq ($(CONFIG_KEXEC_FILE),y)
	$(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c
	endif

	###
	# Kernel objects

	head-y := arch/x86/kernel/head_$(BITS).o
	head-y += arch/x86/kernel/head$(BITS).o
	head-y += arch/x86/kernel/head.o

	libs-y += arch/x86/lib/

	# See arch/x86/Kbuild for content of core part of the kernel
	core-y += arch/x86/

	# drivers-y are linked after core-y
	drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
	drivers-$(CONFIG_PCI) += arch/x86/pci/

	# must be linked after kernel/
	drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/

	# suspend and hibernation support
	drivers-$(CONFIG_PM) += arch/x86/power/

	drivers-$(CONFIG_FB) += arch/x86/video/

	####
	# boot loader support. Several targets are kept for legacy purposes

	boot := arch/x86/boot

	BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage

	PHONY += bzImage $(BOOT_TARGETS)

	# Default kernel to build
	all: bzImage

	# KBUILD_IMAGE specify target image being built
	KBUILD_IMAGE := $(boot)/bzImage

	bzImage: vmlinux
	ifeq ($(CONFIG_X86_DECODER_SELFTEST),y)
	$(Q)$(MAKE) $(build)=arch/x86/tools posttest
	endif
	$(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
	$(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
	$(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@

	$(BOOT_TARGETS): vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $@

	PHONY += install
	install:
	$(Q)$(MAKE) $(build)=$(boot) $@

	PHONY += vdso_install
	vdso_install:
	$(Q)$(MAKE) $(build)=arch/x86/vdso $@

	archclean:
	$(Q)rm -rf $(objtree)/arch/i386
	$(Q)rm -rf $(objtree)/arch/x86_64
	$(Q)$(MAKE) $(clean)=$(boot)
	$(Q)$(MAKE) $(clean)=arch/x86/tools
	$(Q)$(MAKE) $(clean)=arch/x86/purgatory

	define archhelp
	echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
	echo ' install - Install kernel using'
	echo ' (your) ~/bin/$(INSTALLKERNEL) or'
	echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
	echo ' install to $$(INSTALL_PATH) and run lilo'
	echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
	echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
	echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
	echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
	echo ' bzdisk/fdimage*/isoimage also accept:'
	echo ' FDARGS="..." arguments for the booted kernel'
	echo ' FDINITRD=file initrd for the booted kernel'
	endef