arch/x86/Makefile - linux - Git at Google


            
            # Unified Makefile for i386 and x86_64


            # select defconfig based on actual architecture

            
            ifeq ($(ARCH),x86)

            
                    KBUILD_DEFCONFIG := i386_defconfig

            
            else

            
                    KBUILD_DEFCONFIG := $(ARCH)_defconfig

            
            endif


            # 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


            ifeq ($(CONFIG_X86_32),y)

            
                    BITS := 32

            
                    UTS_MACHINE := i386

            
                    CHECKFLAGS += -D__i386__


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

            
                    KBUILD_AFLAGS += $(biarch)

            
                    KBUILD_CFLAGS += $(biarch)


                    ifdef CONFIG_RELOCATABLE

            
                            LDFLAGS_vmlinux := --emit-relocs

            
                    endif


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


                    # 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 $(srctree)/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


                    KBUILD_AFLAGS += -m64

            
                    KBUILD_CFLAGS += -m64


                    # 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 += -maccumulate-outgoing-args

            
            endif


            ifdef CONFIG_CC_STACKPROTECTOR

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

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

            
                            stackp-y := -fstack-protector

            
                            KBUILD_CFLAGS += $(stackp-y)

            
                    else

            
                            $(warning stack protector enabled but no compiler support)

            
                    endif

            
            endif


            # 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)


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

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


            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 += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)


            KBUILD_CFLAGS += $(mflags-y)

            
            KBUILD_AFLAGS += $(mflags-y)


            ###

            
            # 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

            
            head-y += arch/x86/kernel/init_task.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)


            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)
	KBUILD_DEFCONFIG := i386_defconfig
	else
	KBUILD_DEFCONFIG := $(ARCH)_defconfig
	endif

	# 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

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

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

	ifdef CONFIG_RELOCATABLE
	LDFLAGS_vmlinux := --emit-relocs
	endif

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

	# 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 $(srctree)/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

	KBUILD_AFLAGS += -m64
	KBUILD_CFLAGS += -m64

	# 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 += -maccumulate-outgoing-args
	endif

	ifdef CONFIG_CC_STACKPROTECTOR
	cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh
	ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
	stackp-y := -fstack-protector
	KBUILD_CFLAGS += $(stackp-y)
	else
	$(warning stack protector enabled but no compiler support)
	endif
	endif

	# 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)

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

	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 += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)

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

	###
	# 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
	head-y += arch/x86/kernel/init_task.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)

	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