Makefile 7.8 KB

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  1. # Unified Makefile for i386 and x86_64
  2. # select defconfig based on actual architecture
  3. ifeq ($(ARCH),x86)
  4. KBUILD_DEFCONFIG := i386_defconfig
  5. else
  6. KBUILD_DEFCONFIG := $(ARCH)_defconfig
  7. endif
  8. core-$(CONFIG_KVM) += arch/x86/kvm/
  9. # BITS is used as extension for files which are available in a 32 bit
  10. # and a 64 bit version to simplify shared Makefiles.
  11. # e.g.: obj-y += foo_$(BITS).o
  12. export BITS
  13. ifeq ($(CONFIG_X86_32),y)
  14. BITS := 32
  15. UTS_MACHINE := i386
  16. CHECKFLAGS += -D__i386__
  17. biarch := $(call cc-option,-m32)
  18. KBUILD_AFLAGS += $(biarch)
  19. KBUILD_CFLAGS += $(biarch)
  20. ifdef CONFIG_RELOCATABLE
  21. LDFLAGS_vmlinux := --emit-relocs
  22. endif
  23. KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
  24. # prevent gcc from keeping the stack 16 byte aligned
  25. KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
  26. # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
  27. # a lot more stack due to the lack of sharing of stacklots:
  28. KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \
  29. echo $(call cc-option,-fno-unit-at-a-time); fi ;)
  30. # CPU-specific tuning. Anything which can be shared with UML should go here.
  31. include $(srctree)/arch/x86/Makefile_32.cpu
  32. KBUILD_CFLAGS += $(cflags-y)
  33. # temporary until string.h is fixed
  34. KBUILD_CFLAGS += -ffreestanding
  35. else
  36. BITS := 64
  37. UTS_MACHINE := x86_64
  38. CHECKFLAGS += -D__x86_64__ -m64
  39. KBUILD_AFLAGS += -m64
  40. KBUILD_CFLAGS += -m64
  41. # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
  42. cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
  43. cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
  44. cflags-$(CONFIG_MCORE2) += \
  45. $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
  46. cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
  47. KBUILD_CFLAGS += $(cflags-y)
  48. KBUILD_CFLAGS += -mno-red-zone
  49. KBUILD_CFLAGS += -mcmodel=kernel
  50. # -funit-at-a-time shrinks the kernel .text considerably
  51. # unfortunately it makes reading oopses harder.
  52. KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
  53. # this works around some issues with generating unwind tables in older gccs
  54. # newer gccs do it by default
  55. KBUILD_CFLAGS += -maccumulate-outgoing-args
  56. stackp := $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh
  57. stackp-$(CONFIG_CC_STACKPROTECTOR) := $(shell $(stackp) \
  58. "$(CC)" -fstack-protector )
  59. stackp-$(CONFIG_CC_STACKPROTECTOR_ALL) += $(shell $(stackp) \
  60. "$(CC)" -fstack-protector-all )
  61. KBUILD_CFLAGS += $(stackp-y)
  62. endif
  63. # Stackpointer is addressed different for 32 bit and 64 bit x86
  64. sp-$(CONFIG_X86_32) := esp
  65. sp-$(CONFIG_X86_64) := rsp
  66. # do binutils support CFI?
  67. cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
  68. # is .cfi_signal_frame supported too?
  69. cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
  70. KBUILD_AFLAGS += $(cfi) $(cfi-sigframe)
  71. KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
  72. LDFLAGS := -m elf_$(UTS_MACHINE)
  73. # Speed up the build
  74. KBUILD_CFLAGS += -pipe
  75. # Workaround for a gcc prelease that unfortunately was shipped in a suse release
  76. KBUILD_CFLAGS += -Wno-sign-compare
  77. #
  78. KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
  79. # prevent gcc from generating any FP code by mistake
  80. KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
  81. ###
  82. # Sub architecture support
  83. # fcore-y is linked before mcore-y files.
  84. # Default subarch .c files
  85. mcore-y := arch/x86/mach-default/
  86. # Voyager subarch support
  87. mflags-$(CONFIG_X86_VOYAGER) := -Iinclude/asm-x86/mach-voyager
  88. mcore-$(CONFIG_X86_VOYAGER) := arch/x86/mach-voyager/
  89. # VISWS subarch support
  90. #mflags-$(CONFIG_X86_VISWS) := -Iinclude/asm-x86/mach-visws
  91. #mcore-$(CONFIG_X86_VISWS) := arch/x86/mach-visws/
  92. # generic subarchitecture
  93. mflags-$(CONFIG_X86_GENERICARCH):= -Iinclude/asm-x86/mach-generic
  94. fcore-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/
  95. mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default/
  96. # RDC R-321x subarch support
  97. mflags-$(CONFIG_X86_RDC321X) := -Iinclude/asm-x86/mach-rdc321x
  98. mcore-$(CONFIG_X86_RDC321X) := arch/x86/mach-default/
  99. core-$(CONFIG_X86_RDC321X) += arch/x86/mach-rdc321x/
  100. # default subarch .h files
  101. mflags-y += -Iinclude/asm-x86/mach-default
  102. # 64 bit does not support subarch support - clear sub arch variables
  103. fcore-$(CONFIG_X86_64) :=
  104. mcore-$(CONFIG_X86_64) :=
  105. KBUILD_CFLAGS += $(mflags-y)
  106. KBUILD_AFLAGS += $(mflags-y)
  107. ###
  108. # Kernel objects
  109. head-y := arch/x86/kernel/head_$(BITS).o
  110. head-y += arch/x86/kernel/head$(BITS).o
  111. head-y += arch/x86/kernel/head.o
  112. head-y += arch/x86/kernel/init_task.o
  113. libs-y += arch/x86/lib/
  114. # Sub architecture files that needs linking first
  115. core-y += $(fcore-y)
  116. # Xen paravirtualization support
  117. core-$(CONFIG_XEN) += arch/x86/xen/
  118. # lguest paravirtualization support
  119. core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/
  120. core-y += arch/x86/kernel/
  121. core-y += arch/x86/mm/
  122. # Remaining sub architecture files
  123. core-y += $(mcore-y)
  124. core-y += arch/x86/crypto/
  125. core-y += arch/x86/vdso/
  126. core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
  127. # drivers-y are linked after core-y
  128. drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
  129. drivers-$(CONFIG_PCI) += arch/x86/pci/
  130. # must be linked after kernel/
  131. drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
  132. # suspend and hibernation support
  133. drivers-$(CONFIG_PM) += arch/x86/power/
  134. ifeq ($(CONFIG_X86_32),y)
  135. drivers-$(CONFIG_FB) += arch/x86/video/
  136. endif
  137. ####
  138. # boot loader support. Several targets are kept for legacy purposes
  139. boot := arch/x86/boot
  140. PHONY += zImage bzImage compressed zlilo bzlilo \
  141. zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
  142. # Default kernel to build
  143. all: bzImage
  144. # KBUILD_IMAGE specify target image being built
  145. KBUILD_IMAGE := $(boot)/bzImage
  146. zImage zlilo zdisk: KBUILD_IMAGE := $(boot)/zImage
  147. zImage bzImage: vmlinux
  148. $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
  149. $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
  150. $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
  151. compressed: zImage
  152. zlilo bzlilo: vmlinux
  153. $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo
  154. zdisk bzdisk: vmlinux
  155. $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk
  156. fdimage fdimage144 fdimage288 isoimage: vmlinux
  157. $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
  158. install:
  159. $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
  160. PHONY += vdso_install
  161. vdso_install:
  162. $(Q)$(MAKE) $(build)=arch/x86/vdso $@
  163. archclean:
  164. $(Q)rm -rf $(objtree)/arch/i386
  165. $(Q)rm -rf $(objtree)/arch/x86_64
  166. $(Q)$(MAKE) $(clean)=$(boot)
  167. define archhelp
  168. echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
  169. echo ' install - Install kernel using'
  170. echo ' (your) ~/bin/installkernel or'
  171. echo ' (distribution) /sbin/installkernel or'
  172. echo ' install to $$(INSTALL_PATH) and run lilo'
  173. echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
  174. echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
  175. echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
  176. echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
  177. echo ' bzdisk/fdimage*/isoimage also accept:'
  178. echo ' FDARGS="..." arguments for the booted kernel'
  179. echo ' FDINITRD=file initrd for the booted kernel'
  180. endef
  181. CLEAN_FILES += arch/x86/boot/fdimage \
  182. arch/x86/boot/image.iso \
  183. arch/x86/boot/mtools.conf