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Makefile | 2008-12-24 | 7.5 KB | 235 lines |
- # Unified Makefile for i386 and x86_64
-
- # select defconfig based on actual architecture
- ifeq ($(ARCH),x86)
- KBUILD_DEFCONFIG := i386_defconfig
- else
- KBUILD_DEFCONFIG := $(ARCH)_defconfig
- endif
-
- core-$(CONFIG_KVM) += arch/x86/kvm/
-
- # 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 += $(shell if [ $(call cc-version) -lt 0400 ] ; then \
- echo $(call cc-option,-fno-unit-at-a-time); fi ;)
-
- # 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_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
-
- stackp := $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh
- stackp-$(CONFIG_CC_STACKPROTECTOR) := $(shell $(stackp) \
- "$(CC)" -fstack-protector )
- stackp-$(CONFIG_CC_STACKPROTECTOR_ALL) += $(shell $(stackp) \
- "$(CC)" -fstack-protector-all )
-
- KBUILD_CFLAGS += $(stackp-y)
- endif
-
- # Stackpointer is addressed different for 32 bit and 64 bit x86
- sp-$(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)
- KBUILD_AFLAGS += $(cfi) $(cfi-sigframe)
- KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
-
- LDFLAGS := -m elf_$(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 += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
-
- ###
- # Sub architecture support
- # fcore-y is linked before mcore-y files.
-
- # Default subarch .c files
- mcore-y := arch/x86/mach-default/
-
- # Voyager subarch support
- mflags-$(CONFIG_X86_VOYAGER) := -Iarch/x86/include/asm/mach-voyager
- mcore-$(CONFIG_X86_VOYAGER) := arch/x86/mach-voyager/
-
- # generic subarchitecture
- mflags-$(CONFIG_X86_GENERICARCH):= -Iarch/x86/include/asm/mach-generic
- fcore-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/
- mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default/
-
- # default subarch .h files
- mflags-y += -Iarch/x86/include/asm/mach-default
-
- # 64 bit does not support subarch support - clear sub arch variables
- fcore-$(CONFIG_X86_64) :=
- mcore-$(CONFIG_X86_64) :=
-
- 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/
-
- # Sub architecture files that needs linking first
- core-y += $(fcore-y)
-
- # Xen paravirtualization support
- core-$(CONFIG_XEN) += arch/x86/xen/
-
- # lguest paravirtualization support
- core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/
-
- core-y += arch/x86/kernel/
- core-y += arch/x86/mm/
-
- # Remaining sub architecture files
- core-y += $(mcore-y)
-
- core-y += arch/x86/crypto/
- core-y += arch/x86/vdso/
- core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
-
- # 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/
-
- ifeq ($(CONFIG_X86_32),y)
- drivers-$(CONFIG_FB) += arch/x86/video/
- endif
-
- ####
- # boot loader support. Several targets are kept for legacy purposes
-
- boot := arch/x86/boot
-
- PHONY += zImage bzImage compressed zlilo bzlilo \
- zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
-
- # Default kernel to build
- all: bzImage
-
- # KBUILD_IMAGE specify target image being built
- KBUILD_IMAGE := $(boot)/bzImage
- zImage zlilo zdisk: KBUILD_IMAGE := $(boot)/zImage
-
- zImage bzImage: vmlinux
- $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
- $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
- $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
-
- compressed: zImage
-
- zlilo bzlilo: vmlinux
- $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo
-
- zdisk bzdisk: vmlinux
- $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk
-
- fdimage fdimage144 fdimage288 isoimage: vmlinux
- $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
-
- install:
- $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
-
- 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
-
- CLEAN_FILES += arch/x86/boot/fdimage \
- arch/x86/boot/image.iso \
- arch/x86/boot/mtools.conf
-