linux/arch/x86/Makefile
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   1# Unified Makefile for i386 and x86_64
   2
   3# select defconfig based on actual architecture
   4ifeq ($(ARCH),x86)
   5        KBUILD_DEFCONFIG := i386_defconfig
   6else
   7        KBUILD_DEFCONFIG := $(ARCH)_defconfig
   8endif
   9
  10core-$(CONFIG_KVM) += arch/x86/kvm/
  11
  12# BITS is used as extension for files which are available in a 32 bit
  13# and a 64 bit version to simplify shared Makefiles.
  14# e.g.: obj-y += foo_$(BITS).o
  15export BITS
  16
  17ifeq ($(CONFIG_X86_32),y)
  18        BITS := 32
  19        UTS_MACHINE := i386
  20        CHECKFLAGS += -D__i386__
  21
  22        biarch := $(call cc-option,-m32)
  23        KBUILD_AFLAGS += $(biarch)
  24        KBUILD_CFLAGS += $(biarch)
  25
  26        ifdef CONFIG_RELOCATABLE
  27                LDFLAGS_vmlinux := --emit-relocs
  28        endif
  29
  30        KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
  31
  32        # prevent gcc from keeping the stack 16 byte aligned
  33        KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
  34
  35        # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
  36        # a lot more stack due to the lack of sharing of stacklots:
  37        KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \
  38                echo $(call cc-option,-fno-unit-at-a-time); fi ;)
  39
  40        # CPU-specific tuning. Anything which can be shared with UML should go here.
  41        include $(srctree)/arch/x86/Makefile_32.cpu
  42        KBUILD_CFLAGS += $(cflags-y)
  43
  44        # temporary until string.h is fixed
  45        KBUILD_CFLAGS += -ffreestanding
  46else
  47        BITS := 64
  48        UTS_MACHINE := x86_64
  49        CHECKFLAGS += -D__x86_64__ -m64
  50
  51        KBUILD_AFLAGS += -m64
  52        KBUILD_CFLAGS += -m64
  53
  54        # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
  55        cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
  56        cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
  57
  58        cflags-$(CONFIG_MCORE2) += \
  59                $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
  60        cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
  61        KBUILD_CFLAGS += $(cflags-y)
  62
  63        KBUILD_CFLAGS += -mno-red-zone
  64        KBUILD_CFLAGS += -mcmodel=kernel
  65
  66        # -funit-at-a-time shrinks the kernel .text considerably
  67        # unfortunately it makes reading oopses harder.
  68        KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
  69
  70        # this works around some issues with generating unwind tables in older gccs
  71        # newer gccs do it by default
  72        KBUILD_CFLAGS += -maccumulate-outgoing-args
  73
  74        stackp := $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh
  75        stackp-$(CONFIG_CC_STACKPROTECTOR) := $(shell $(stackp) \
  76                "$(CC)" -fstack-protector )
  77        stackp-$(CONFIG_CC_STACKPROTECTOR_ALL) += $(shell $(stackp) \
  78                "$(CC)" -fstack-protector-all )
  79
  80        KBUILD_CFLAGS += $(stackp-y)
  81endif
  82
  83# Stackpointer is addressed different for 32 bit and 64 bit x86
  84sp-$(CONFIG_X86_32) := esp
  85sp-$(CONFIG_X86_64) := rsp
  86
  87# do binutils support CFI?
  88cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
  89# is .cfi_signal_frame supported too?
  90cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
  91KBUILD_AFLAGS += $(cfi) $(cfi-sigframe)
  92KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
  93
  94LDFLAGS := -m elf_$(UTS_MACHINE)
  95
  96# Speed up the build
  97KBUILD_CFLAGS += -pipe
  98# Workaround for a gcc prelease that unfortunately was shipped in a suse release
  99KBUILD_CFLAGS += -Wno-sign-compare
 100#
 101KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 102# prevent gcc from generating any FP code by mistake
 103KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
 104
 105###
 106# Sub architecture support
 107# fcore-y is linked before mcore-y files.
 108
 109# Default subarch .c files
 110mcore-y  := arch/x86/mach-default/
 111
 112# Voyager subarch support
 113mflags-$(CONFIG_X86_VOYAGER)    := -Iarch/x86/include/asm/mach-voyager
 114mcore-$(CONFIG_X86_VOYAGER)     := arch/x86/mach-voyager/
 115
 116# generic subarchitecture
 117mflags-$(CONFIG_X86_GENERICARCH):= -Iarch/x86/include/asm/mach-generic
 118fcore-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/
 119mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default/
 120
 121# default subarch .h files
 122mflags-y += -Iarch/x86/include/asm/mach-default
 123
 124# 64 bit does not support subarch support - clear sub arch variables
 125fcore-$(CONFIG_X86_64)  :=
 126mcore-$(CONFIG_X86_64)  :=
 127
 128KBUILD_CFLAGS += $(mflags-y)
 129KBUILD_AFLAGS += $(mflags-y)
 130
 131###
 132# Kernel objects
 133
 134head-y := arch/x86/kernel/head_$(BITS).o
 135head-y += arch/x86/kernel/head$(BITS).o
 136head-y += arch/x86/kernel/head.o
 137head-y += arch/x86/kernel/init_task.o
 138
 139libs-y  += arch/x86/lib/
 140
 141# Sub architecture files that needs linking first
 142core-y += $(fcore-y)
 143
 144# Xen paravirtualization support
 145core-$(CONFIG_XEN) += arch/x86/xen/
 146
 147# lguest paravirtualization support
 148core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/
 149
 150core-y += arch/x86/kernel/
 151core-y += arch/x86/mm/
 152
 153# Remaining sub architecture files
 154core-y += $(mcore-y)
 155
 156core-y += arch/x86/crypto/
 157core-y += arch/x86/vdso/
 158core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
 159
 160# drivers-y are linked after core-y
 161drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
 162drivers-$(CONFIG_PCI)            += arch/x86/pci/
 163
 164# must be linked after kernel/
 165drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
 166
 167# suspend and hibernation support
 168drivers-$(CONFIG_PM) += arch/x86/power/
 169
 170ifeq ($(CONFIG_X86_32),y)
 171drivers-$(CONFIG_FB) += arch/x86/video/
 172endif
 173
 174####
 175# boot loader support. Several targets are kept for legacy purposes
 176
 177boot := arch/x86/boot
 178
 179PHONY += zImage bzImage compressed zlilo bzlilo \
 180         zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
 181
 182# Default kernel to build
 183all: bzImage
 184
 185# KBUILD_IMAGE specify target image being built
 186                    KBUILD_IMAGE := $(boot)/bzImage
 187zImage zlilo zdisk: KBUILD_IMAGE := $(boot)/zImage
 188
 189zImage bzImage: vmlinux
 190        $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
 191        $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
 192        $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
 193
 194compressed: zImage
 195
 196zlilo bzlilo: vmlinux
 197        $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo
 198
 199zdisk bzdisk: vmlinux
 200        $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk
 201
 202fdimage fdimage144 fdimage288 isoimage: vmlinux
 203        $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
 204
 205install:
 206        $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
 207
 208PHONY += vdso_install
 209vdso_install:
 210        $(Q)$(MAKE) $(build)=arch/x86/vdso $@
 211
 212archclean:
 213        $(Q)rm -rf $(objtree)/arch/i386
 214        $(Q)rm -rf $(objtree)/arch/x86_64
 215        $(Q)$(MAKE) $(clean)=$(boot)
 216
 217define archhelp
 218  echo  '* bzImage      - Compressed kernel image (arch/x86/boot/bzImage)'
 219  echo  '  install      - Install kernel using'
 220  echo  '                  (your) ~/bin/installkernel or'
 221  echo  '                  (distribution) /sbin/installkernel or'
 222  echo  '                  install to $$(INSTALL_PATH) and run lilo'
 223  echo  '  fdimage      - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
 224  echo  '  fdimage144   - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
 225  echo  '  fdimage288   - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
 226  echo  '  isoimage     - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
 227  echo  '                  bzdisk/fdimage*/isoimage also accept:'
 228  echo  '                  FDARGS="..."  arguments for the booted kernel'
 229  echo  '                  FDINITRD=file initrd for the booted kernel'
 230endef
 231
 232CLEAN_FILES += arch/x86/boot/fdimage \
 233               arch/x86/boot/image.iso \
 234               arch/x86/boot/mtools.conf
 235