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288 lines
9.8 KiB
288 lines
9.8 KiB
# Unified Makefile for i386 and x86_64 |
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# select defconfig based on actual architecture |
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ifeq ($(ARCH),x86) |
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ifeq ($(shell uname -m),x86_64) |
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KBUILD_DEFCONFIG := x86_64_defconfig |
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else |
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KBUILD_DEFCONFIG := i386_defconfig |
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endif |
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else |
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KBUILD_DEFCONFIG := $(ARCH)_defconfig |
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endif |
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# How to compile the 16-bit code. Note we always compile for -march=i386; |
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# that way we can complain to the user if the CPU is insufficient. |
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# |
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# The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For |
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# older versions of GCC, include an *assembly* header to make sure that |
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# gcc doesn't play any games behind our back. |
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CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h |
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M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS)) |
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REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -D__KERNEL__ \ |
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-DDISABLE_BRANCH_PROFILING \ |
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-Wall -Wstrict-prototypes -march=i386 -mregparm=3 \ |
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-fno-strict-aliasing -fomit-frame-pointer -fno-pic \ |
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-mno-mmx -mno-sse \ |
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$(call cc-option, -ffreestanding) \ |
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$(call cc-option, -fno-stack-protector) \ |
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$(call cc-option, -mpreferred-stack-boundary=2) |
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export REALMODE_CFLAGS |
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# BITS is used as extension for files which are available in a 32 bit |
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# and a 64 bit version to simplify shared Makefiles. |
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# e.g.: obj-y += foo_$(BITS).o |
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export BITS |
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ifdef CONFIG_X86_NEED_RELOCS |
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LDFLAGS_vmlinux := --emit-relocs |
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endif |
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# |
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# Prevent GCC from generating any FP code by mistake. |
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# |
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# This must happen before we try the -mpreferred-stack-boundary, see: |
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# |
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383 |
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# |
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KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow |
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KBUILD_CFLAGS += $(call cc-option,-mno-avx,) |
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ifeq ($(CONFIG_X86_32),y) |
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BITS := 32 |
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UTS_MACHINE := i386 |
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CHECKFLAGS += -D__i386__ |
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biarch := $(call cc-option,-m32) |
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KBUILD_AFLAGS += $(biarch) |
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KBUILD_CFLAGS += $(biarch) |
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KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return |
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# Never want PIC in a 32-bit kernel, prevent breakage with GCC built |
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# with nonstandard options |
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KBUILD_CFLAGS += -fno-pic |
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# prevent gcc from keeping the stack 16 byte aligned |
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KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2) |
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# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use |
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# a lot more stack due to the lack of sharing of stacklots: |
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KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \ |
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$(call cc-option,-fno-unit-at-a-time)) |
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# CPU-specific tuning. Anything which can be shared with UML should go here. |
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include arch/x86/Makefile_32.cpu |
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KBUILD_CFLAGS += $(cflags-y) |
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# temporary until string.h is fixed |
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KBUILD_CFLAGS += -ffreestanding |
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else |
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BITS := 64 |
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UTS_MACHINE := x86_64 |
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CHECKFLAGS += -D__x86_64__ -m64 |
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biarch := -m64 |
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KBUILD_AFLAGS += -m64 |
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KBUILD_CFLAGS += -m64 |
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# Align jump targets to 1 byte, not the default 16 bytes: |
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KBUILD_CFLAGS += -falign-jumps=1 |
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# Pack loops tightly as well: |
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KBUILD_CFLAGS += -falign-loops=1 |
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# Don't autogenerate traditional x87 instructions |
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KBUILD_CFLAGS += $(call cc-option,-mno-80387) |
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KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387) |
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KBUILD_CFLAGS += -fno-pic |
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# Use -mpreferred-stack-boundary=3 if supported. |
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KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3) |
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# Use -mskip-rax-setup if supported. |
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KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup) |
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# FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) |
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cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) |
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cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) |
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cflags-$(CONFIG_MCORE2) += \ |
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$(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) |
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cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \ |
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$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) |
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cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) |
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KBUILD_CFLAGS += $(cflags-y) |
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KBUILD_CFLAGS += -mno-red-zone |
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KBUILD_CFLAGS += -mcmodel=kernel |
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# -funit-at-a-time shrinks the kernel .text considerably |
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# unfortunately it makes reading oopses harder. |
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KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) |
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# this works around some issues with generating unwind tables in older gccs |
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# newer gccs do it by default |
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KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args) |
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endif |
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# Make sure compiler does not have buggy stack-protector support. |
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ifdef CONFIG_CC_STACKPROTECTOR |
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cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh |
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ifneq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) |
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$(warning stack-protector enabled but compiler support broken) |
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endif |
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endif |
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ifdef CONFIG_X86_X32 |
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x32_ld_ok := $(call try-run,\ |
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/bin/echo -e '1: .quad 1b' | \ |
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$(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \ |
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$(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \ |
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$(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n) |
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ifeq ($(x32_ld_ok),y) |
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CONFIG_X86_X32_ABI := y |
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KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI |
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KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI |
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else |
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$(warning CONFIG_X86_X32 enabled but no binutils support) |
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endif |
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endif |
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export CONFIG_X86_X32_ABI |
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# Don't unroll struct assignments with kmemcheck enabled |
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ifeq ($(CONFIG_KMEMCHECK),y) |
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KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy) |
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endif |
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# Stackpointer is addressed different for 32 bit and 64 bit x86 |
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sp-$(CONFIG_X86_32) := esp |
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sp-$(CONFIG_X86_64) := rsp |
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# do binutils support CFI? |
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cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1) |
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# is .cfi_signal_frame supported too? |
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cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1) |
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cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1) |
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# does binutils support specific instructions? |
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asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1) |
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asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1) |
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asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1) |
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avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) |
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avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) |
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sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI=1) |
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sha256_ni_instr :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA256_NI=1) |
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KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(sha1_ni_instr) $(sha256_ni_instr) |
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KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(sha1_ni_instr) $(sha256_ni_instr) |
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LDFLAGS := -m elf_$(UTS_MACHINE) |
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# Speed up the build |
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KBUILD_CFLAGS += -pipe |
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# Workaround for a gcc prelease that unfortunately was shipped in a suse release |
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KBUILD_CFLAGS += -Wno-sign-compare |
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# |
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KBUILD_CFLAGS += -fno-asynchronous-unwind-tables |
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KBUILD_CFLAGS += $(mflags-y) |
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KBUILD_AFLAGS += $(mflags-y) |
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archscripts: scripts_basic |
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$(Q)$(MAKE) $(build)=arch/x86/tools relocs |
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### |
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# Syscall table generation |
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archheaders: |
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$(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all |
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archprepare: |
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ifeq ($(CONFIG_KEXEC_FILE),y) |
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$(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c |
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endif |
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### |
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# Kernel objects |
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head-y := arch/x86/kernel/head_$(BITS).o |
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head-y += arch/x86/kernel/head$(BITS).o |
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head-y += arch/x86/kernel/head.o |
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libs-y += arch/x86/lib/ |
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# See arch/x86/Kbuild for content of core part of the kernel |
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core-y += arch/x86/ |
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# drivers-y are linked after core-y |
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drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/ |
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drivers-$(CONFIG_PCI) += arch/x86/pci/ |
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# must be linked after kernel/ |
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drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/ |
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# suspend and hibernation support |
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drivers-$(CONFIG_PM) += arch/x86/power/ |
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drivers-$(CONFIG_FB) += arch/x86/video/ |
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drivers-$(CONFIG_RAS) += arch/x86/ras/ |
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#### |
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# boot loader support. Several targets are kept for legacy purposes |
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boot := arch/x86/boot |
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BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage |
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PHONY += bzImage $(BOOT_TARGETS) |
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# Default kernel to build |
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all: bzImage |
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# KBUILD_IMAGE specify target image being built |
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KBUILD_IMAGE := $(boot)/bzImage |
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bzImage: vmlinux |
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ifeq ($(CONFIG_X86_DECODER_SELFTEST),y) |
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$(Q)$(MAKE) $(build)=arch/x86/tools posttest |
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endif |
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$(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE) |
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$(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot |
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$(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@ |
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$(BOOT_TARGETS): vmlinux |
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$(Q)$(MAKE) $(build)=$(boot) $@ |
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PHONY += install |
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install: |
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$(Q)$(MAKE) $(build)=$(boot) $@ |
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PHONY += vdso_install |
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vdso_install: |
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$(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@ |
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archclean: |
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$(Q)rm -rf $(objtree)/arch/i386 |
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$(Q)rm -rf $(objtree)/arch/x86_64 |
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$(Q)$(MAKE) $(clean)=$(boot) |
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$(Q)$(MAKE) $(clean)=arch/x86/tools |
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$(Q)$(MAKE) $(clean)=arch/x86/purgatory |
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define archhelp |
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echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)' |
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echo ' install - Install kernel using' |
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echo ' (your) ~/bin/$(INSTALLKERNEL) or' |
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echo ' (distribution) /sbin/$(INSTALLKERNEL) or' |
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echo ' install to $$(INSTALL_PATH) and run lilo' |
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echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' |
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echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' |
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echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)' |
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echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)' |
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echo ' bzdisk/fdimage*/isoimage also accept:' |
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echo ' FDARGS="..." arguments for the booted kernel' |
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echo ' FDINITRD=file initrd for the booted kernel' |
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endef
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