| # Unified Makefile for i386 and x86_64 |
| |
| # select defconfig based on actual architecture |
| ifeq ($(ARCH),x86) |
| ifeq ($(shell uname -m),x86_64) |
| KBUILD_DEFCONFIG := x86_64_defconfig |
| else |
| KBUILD_DEFCONFIG := i386_defconfig |
| endif |
| else |
| KBUILD_DEFCONFIG := $(ARCH)_defconfig |
| endif |
| |
| # How to compile the 16-bit code. Note we always compile for -march=i386; |
| # that way we can complain to the user if the CPU is insufficient. |
| # |
| # The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For |
| # older versions of GCC, include an *assembly* header to make sure that |
| # gcc doesn't play any games behind our back. |
| CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h |
| M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS)) |
| |
| REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -D__KERNEL__ \ |
| -DDISABLE_BRANCH_PROFILING \ |
| -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \ |
| -fno-strict-aliasing -fomit-frame-pointer -fno-pic \ |
| -mno-mmx -mno-sse \ |
| $(call cc-option, -ffreestanding) \ |
| $(call cc-option, -fno-stack-protector) \ |
| $(call cc-option, -mpreferred-stack-boundary=2) |
| export REALMODE_CFLAGS |
| |
| # BITS is used as extension for files which are available in a 32 bit |
| # and a 64 bit version to simplify shared Makefiles. |
| # e.g.: obj-y += foo_$(BITS).o |
| export BITS |
| |
| ifdef CONFIG_X86_NEED_RELOCS |
| LDFLAGS_vmlinux := --emit-relocs |
| endif |
| |
| ifeq ($(CONFIG_X86_32),y) |
| BITS := 32 |
| UTS_MACHINE := i386 |
| CHECKFLAGS += -D__i386__ |
| |
| biarch := $(call cc-option,-m32) |
| KBUILD_AFLAGS += $(biarch) |
| KBUILD_CFLAGS += $(biarch) |
| |
| KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return |
| |
| # Don't autogenerate MMX or SSE instructions |
| KBUILD_CFLAGS += -mno-mmx -mno-sse |
| |
| # Never want PIC in a 32-bit kernel, prevent breakage with GCC built |
| # with nonstandard options |
| KBUILD_CFLAGS += -fno-pic |
| |
| # 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 |
| |
| biarch := -m64 |
| KBUILD_AFLAGS += -m64 |
| KBUILD_CFLAGS += -m64 |
| |
| # Don't autogenerate traditional x87, MMX or SSE instructions |
| KBUILD_CFLAGS += -mno-mmx -mno-sse |
| KBUILD_CFLAGS += $(call cc-option,-mno-80387) |
| KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387) |
| |
| # Use -mpreferred-stack-boundary=3 if supported. |
| KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3) |
| |
| # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) |
| cflags-$(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 += $(call cc-option,-maccumulate-outgoing-args) |
| endif |
| |
| # Make sure compiler does not have buggy stack-protector support. |
| ifdef CONFIG_CC_STACKPROTECTOR |
| cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh |
| ifneq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) |
| $(warning stack-protector enabled but compiler support broken) |
| endif |
| endif |
| |
| ifdef CONFIG_X86_X32 |
| x32_ld_ok := $(call try-run,\ |
| /bin/echo -e '1: .quad 1b' | \ |
| $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \ |
| $(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \ |
| $(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n) |
| ifeq ($(x32_ld_ok),y) |
| CONFIG_X86_X32_ABI := y |
| KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI |
| KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI |
| else |
| $(warning CONFIG_X86_X32 enabled but no binutils support) |
| endif |
| endif |
| export CONFIG_X86_X32_ABI |
| |
| # 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) |
| asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1) |
| avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) |
| avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) |
| |
| KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) |
| KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) |
| |
| 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 += $(call cc-option,-mno-avx,) |
| |
| KBUILD_CFLAGS += $(mflags-y) |
| KBUILD_AFLAGS += $(mflags-y) |
| |
| archscripts: scripts_basic |
| $(Q)$(MAKE) $(build)=arch/x86/tools relocs |
| |
| ### |
| # Syscall table generation |
| |
| archheaders: |
| $(Q)$(MAKE) $(build)=arch/x86/syscalls all |
| |
| ### |
| # 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 |
| |
| 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) |
| $(Q)$(MAKE) $(clean)=arch/x86/tools |
| |
| PHONY += kvmconfig |
| kvmconfig: |
| $(if $(wildcard $(objtree)/.config),, $(error You need an existing .config for this target)) |
| $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m -O $(objtree) $(objtree)/.config $(srctree)/arch/x86/configs/kvm_guest.config |
| $(Q)yes "" | $(MAKE) -f $(srctree)/Makefile oldconfig |
| |
| 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' |
| echo ' kvmconfig - Enable additional options for guest kernel support' |
| endef |