arch/x86/Makefile

   1 # Unified Makefile for i386 and x86_64
   2
   3 # select defconfig based on actual architecture
   4 ifeq ($(ARCH),x86)
   5         KBUILD_DEFCONFIG := i386_defconfig
   6 else
   7         KBUILD_DEFCONFIG := $(ARCH)_defconfig
   8 endif
   9
  10 core-$(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_$(BITS).o
  15 export BITS
  16
  17 ifeq ($(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 += $(cflags-y)
  43
  44         # temporary until string.h is fixed
  45         KBUILD_CFLAGS += -ffreestanding
  46 else
  47         BITS := 64
  48         UTS_MACHINE := x86_64
  49         CHECKFLAGS += -D__x86_64__ -m64
  50
  51         KBUILD_AFLAGS += -m64
  52         KBUILD_CFLAGS += -m64
  53
  54         # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
  55         cflags-$(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 += $(stackp-y)
  81 endif
  82
  83 # Stackpointer is addressed different for 32 bit and 64 bit x86
  84 sp-$(CONFIG_X86_32) := esp
  85 sp-$(CONFIG_X86_64) := rsp
  86
  87 # do binutils support CFI?
  88 cfi := $(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?
  90 cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
  91 KBUILD_AFLAGS += $(cfi) $(cfi-sigframe)
  92 KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
  93
  94 LDFLAGS := -m elf_$(UTS_MACHINE)
  95
  96 # Speed up the build
  97 KBUILD_CFLAGS += -pipe
  98 # Workaround for a gcc prelease that unfortunately was shipped in a suse release
  99 KBUILD_CFLAGS += -Wno-sign-compare
 100 #
 101 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 102 # prevent gcc from generating any FP code by mistake
 103 KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
 104
 105 ###
 106 # Sub architecture support
 107 # fcore-y is linked before mcore-y files.
 108
 109 # Default subarch .c files
 110 mcore-y  := arch/x86/mach-default/
 111
 112 # Voyager subarch support
 113 mflags-$(CONFIG_X86_VOYAGER)    := -Iarch/x86/include/asm/mach-voyager
 114 mcore-$(CONFIG_X86_VOYAGER)     := arch/x86/mach-voyager/
 115
 116 # generic subarchitecture
 117 mflags-$(CONFIG_X86_GENERICARCH):= -Iarch/x86/include/asm/mach-generic
 118 fcore-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/
 119 mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default/
 120
 121 # default subarch .h files
 122 mflags-y += -Iarch/x86/include/asm/mach-default
 123
 124 # 64 bit does not support subarch support - clear sub arch variables
 125 fcore-$(CONFIG_X86_64)  :=
 126 mcore-$(CONFIG_X86_64)  :=
 127
 128 KBUILD_CFLAGS += $(mflags-y)
 129 KBUILD_AFLAGS += $(mflags-y)
 130
 131 ###
 132 # Kernel objects
 133
 134 head-y := arch/x86/kernel/head_$(BITS).o
 135 head-y += arch/x86/kernel/head$(BITS).o
 136 head-y += arch/x86/kernel/head.o
 137 head-y += arch/x86/kernel/init_task.o
 138
 139 libs-y  += arch/x86/lib/
 140
 141 # Sub architecture files that needs linking first
 142 core-y += $(fcore-y)
 143
 144 # Xen paravirtualization support
 145 core-$(CONFIG_XEN) += arch/x86/xen/
 146
 147 # lguest paravirtualization support
 148 core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/
 149
 150 core-y += arch/x86/kernel/
 151 core-y += arch/x86/mm/
 152
 153 # Remaining sub architecture files
 154 core-y += $(mcore-y)
 155
 156 core-y += arch/x86/crypto/
 157 core-y += arch/x86/vdso/
 158 core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
 159
 160 # drivers-y are linked after core-y
 161 drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
 162 drivers-$(CONFIG_PCI)            += arch/x86/pci/
 163
 164 # must be linked after kernel/
 165 drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
 166
 167 # suspend and hibernation support
 168 drivers-$(CONFIG_PM) += arch/x86/power/
 169
 170 ifeq ($(CONFIG_X86_32),y)
 171 drivers-$(CONFIG_FB) += arch/x86/video/
 172 endif
 173
 174 ####
 175 # boot loader support. Several targets are kept for legacy purposes
 176
 177 boot := arch/x86/boot
 178
 179 PHONY += zImage bzImage compressed zlilo bzlilo \
 180          zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
 181
 182 # Default kernel to build
 183 all: bzImage
 184
 185 # KBUILD_IMAGE specify target image being built
 186                     KBUILD_IMAGE := $(boot)/bzImage
 187 zImage zlilo zdisk: KBUILD_IMAGE := $(boot)/zImage
 188
 189 zImage 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
 194 compressed: zImage
 195
 196 zlilo bzlilo: vmlinux
 197         $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo
 198
 199 zdisk bzdisk: vmlinux
 200         $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk
 201
 202 fdimage fdimage144 fdimage288 isoimage: vmlinux
 203         $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
 204
 205 install:
 206         $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
 207
 208 PHONY += vdso_install
 209 vdso_install:
 210         $(Q)$(MAKE) $(build)=arch/x86/vdso $@
 211
 212 archclean:
 213         $(Q)rm -rf $(objtree)/arch/i386
 214         $(Q)rm -rf $(objtree)/arch/x86_64
 215         $(Q)$(MAKE) $(clean)=$(boot)
 216
 217 define 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'
 230 endef
 231
 232 CLEAN_FILES += arch/x86/boot/fdimage \
 233                arch/x86/boot/image.iso \
 234                arch/x86/boot/mtools.conf