[mirror_ubuntu-bionic-kernel.git] / arch / x86 / Makefile

# 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

# For gcc stack alignment is specified with -mpreferred-stack-boundary,
# clang has the option -mstack-alignment for that purpose.
ifneq ($(call cc-option, -mpreferred-stack-boundary=4),)
      cc_stack_align4 := -mpreferred-stack-boundary=2
      cc_stack_align8 := -mpreferred-stack-boundary=3
else ifneq ($(call cc-option, -mstack-alignment=16),)
      cc_stack_align4 := -mstack-alignment=4
      cc_stack_align8 := -mstack-alignment=8
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

REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -ffreestanding)
REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -fno-stack-protector)
REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), $(cc_stack_align4))
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

#
# Prevent GCC from generating any FP code by mistake.
#
# This must happen before we try the -mpreferred-stack-boundary, see:
#
#    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
#
KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
KBUILD_CFLAGS += $(call cc-option,-mno-avx,)

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

        # Never want PIC in a 32-bit kernel, prevent breakage with GCC built
        # with nonstandard options
        KBUILD_CFLAGS += -fno-pic

        # Align the stack to the register width instead of using the default
        # alignment of 16 bytes. This reduces stack usage and the number of
        # alignment instructions.
        KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align4))

        # 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 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

        # Align jump targets to 1 byte, not the default 16 bytes:
        KBUILD_CFLAGS += $(call cc-option,-falign-jumps=1)

        # Pack loops tightly as well:
        KBUILD_CFLAGS += $(call cc-option,-falign-loops=1)

        # Don't autogenerate traditional x87 instructions
        KBUILD_CFLAGS += $(call cc-option,-mno-80387)
        KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)

        # By default gcc and clang use a stack alignment of 16 bytes for x86.
        # However the standard kernel entry on x86-64 leaves the stack on an
        # 8-byte boundary. If the compiler isn't informed about the actual
        # alignment it will generate extra alignment instructions for the
        # default alignment which keep the stack *mis*aligned.
        # Furthermore an alignment to the register width reduces stack usage
        # and the number of alignment instructions.
        KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align8))

	# Use -mskip-rax-setup if supported.
	KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)

        # 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)
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

#
# If the function graph tracer is used with mcount instead of fentry,
# '-maccumulate-outgoing-args' is needed to prevent a GCC bug
# (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42109)
#
ifdef CONFIG_FUNCTION_GRAPH_TRACER
  ifndef CONFIG_HAVE_FENTRY
	ACCUMULATE_OUTGOING_ARGS := 1
  else
    ifeq ($(call cc-option-yn, -mfentry), n)
	ACCUMULATE_OUTGOING_ARGS := 1

	# GCC ignores '-maccumulate-outgoing-args' when used with '-Os'.
	# If '-Os' is enabled, disable it and print a warning.
        ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
          undefine CONFIG_CC_OPTIMIZE_FOR_SIZE
          $(warning Disabling CONFIG_CC_OPTIMIZE_FOR_SIZE.  Your compiler does not have -mfentry so you cannot optimize for size with CONFIG_FUNCTION_GRAPH_TRACER.)
        endif

    endif
  endif
endif

#
# Jump labels need '-maccumulate-outgoing-args' for gcc < 4.5.2 to prevent a
# GCC bug (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46226).  There's no way
# to test for this bug at compile-time because the test case needs to execute,
# which is a no-go for cross compilers.  So check the GCC version instead.
#
ifdef CONFIG_JUMP_LABEL
  ifneq ($(ACCUMULATE_OUTGOING_ARGS), 1)
	ACCUMULATE_OUTGOING_ARGS = $(call cc-if-fullversion, -lt, 040502, 1)
  endif
endif

ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1)
	# This compiler flag is not supported by Clang:
	KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,)
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 += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=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$(comma)%ymm1,-DCONFIG_AS_AVX2=1)
avx512_instr :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,-DCONFIG_AS_AVX512=1)
sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI=1)
sha256_ni_instr :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA256_NI=1)

KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr)
KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_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

archscripts: scripts_basic
	$(Q)$(MAKE) $(build)=arch/x86/tools relocs

###
# Syscall table generation

archheaders:
	$(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all

archprepare:
ifeq ($(CONFIG_KEXEC_FILE),y)
	$(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c
endif

###
# Kernel objects

head-y := arch/x86/kernel/head_$(BITS).o
head-y += arch/x86/kernel/head$(BITS).o
head-y += arch/x86/kernel/ebda.o
head-y += arch/x86/kernel/platform-quirks.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/entry/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
	$(Q)$(MAKE) $(clean)=arch/x86/purgatory

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'
endef
Commit	Line	Data
74b469f2 SR	1	# Unified Makefile for i386 and x86_64
74b469f2 SR	2
2266cfd5	3	# select defconfig based on actual architecture
d746d647	4	ifeq ($(ARCH),x86)
ffee0de4 DW	5	ifeq ($(shell uname -m),x86_64)
	6	KBUILD_DEFCONFIG := x86_64_defconfig
	7	else
d746d647	8	KBUILD_DEFCONFIG := i386_defconfig
ffee0de4	9	endif
d746d647 SR	10	else
	11	KBUILD_DEFCONFIG := $(ARCH)_defconfig
	12	endif
2266cfd5	13
d77698df MK	14	# For gcc stack alignment is specified with -mpreferred-stack-boundary,
	15	# clang has the option -mstack-alignment for that purpose.
	16	ifneq ($(call cc-option, -mpreferred-stack-boundary=4),)
8f918697 MK	17	cc_stack_align4 := -mpreferred-stack-boundary=2
	18	cc_stack_align8 := -mpreferred-stack-boundary=3
	19	else ifneq ($(call cc-option, -mstack-alignment=16),)
	20	cc_stack_align4 := -mstack-alignment=4
	21	cc_stack_align8 := -mstack-alignment=8
d77698df MK	22	endif
d77698df MK	23
1c678da3 DW	24	# How to compile the 16-bit code. Note we always compile for -march=i386;
1c678da3 DW	25	# that way we can complain to the user if the CPU is insufficient.
de3accda DW	26	#
de3accda DW	27	# The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For
a9cfccee PA	28	# older versions of GCC, include an assembly header to make sure that
	29	# gcc doesn't play any games behind our back.
	30	CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h
de3accda DW	31	M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS))
	32
	33	REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -D__KERNEL__ \
	34	-DDISABLE_BRANCH_PROFILING \
1c678da3	35	-Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
1c678da3	36	-fno-strict-aliasing -fomit-frame-pointer -fno-pic \
032a2c4f MK	37	-mno-mmx -mno-sse
	38
	39	REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -ffreestanding)
	40	REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -fno-stack-protector)
9e8730b1	41	REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), $(cc_stack_align4))
1c678da3 DW	42	export REALMODE_CFLAGS
1c678da3 DW	43
0a6ef376 SR	44	# BITS is used as extension for files which are available in a 32 bit
	45	# and a 64 bit version to simplify shared Makefiles.
	46	# e.g.: obj-y += foo_$(BITS).o
	47	export BITS
74b469f2	48
a0215061 KC	49	ifdef CONFIG_X86_NEED_RELOCS
	50	LDFLAGS_vmlinux := --emit-relocs
	51	endif
	52
b2c51106 AL	53	#
	54	# Prevent GCC from generating any FP code by mistake.
	55	#
	56	# This must happen before we try the -mpreferred-stack-boundary, see:
	57	#
	58	# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
	59	#
	60	KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
	61	KBUILD_CFLAGS += $(call cc-option,-mno-avx,)
	62
d746d647	63	ifeq ($(CONFIG_X86_32),y)
0a6ef376	64	BITS := 32
8c6531f7	65	UTS_MACHINE := i386
4ba7e5cd	66	CHECKFLAGS += -D__i386__
0a6ef376	67
4ba7e5cd SR	68	biarch := $(call cc-option,-m32)
	69	KBUILD_AFLAGS += $(biarch)
	70	KBUILD_CFLAGS += $(biarch)
0a6ef376	71
0a6ef376 SR	72	KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
0a6ef376 SR	73
484d90ee AB	74	# Never want PIC in a 32-bit kernel, prevent breakage with GCC built
	75	# with nonstandard options
	76	KBUILD_CFLAGS += -fno-pic
	77
d77698df MK	78	# Align the stack to the register width instead of using the default
	79	# alignment of 16 bytes. This reduces stack usage and the number of
	80	# alignment instructions.
9e8730b1	81	KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align4))
0a6ef376 SR	82
	83	# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
	84	# a lot more stack due to the lack of sharing of stacklots:
c7bd0414 FP	85	KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \
c7bd0414 FP	86	$(call cc-option,-fno-unit-at-a-time))
0a6ef376 SR	87
0a6ef376 SR	88	# CPU-specific tuning. Anything which can be shared with UML should go here.
a436bb7b	89	include arch/x86/Makefile_32.cpu
0a6ef376 SR	90	KBUILD_CFLAGS += $(cflags-y)
	91
	92	# temporary until string.h is fixed
	93	KBUILD_CFLAGS += -ffreestanding
74b469f2	94	else
0a6ef376	95	BITS := 64
8c6531f7	96	UTS_MACHINE := x86_64
0a6ef376 SR	97	CHECKFLAGS += -D__x86_64__ -m64
0a6ef376 SR	98
14262d67	99	biarch := -m64
0a6ef376 SR	100	KBUILD_AFLAGS += -m64
	101	KBUILD_CFLAGS += -m64
	102
be6cb027	103	# Align jump targets to 1 byte, not the default 16 bytes:
2c4fd1ac	104	KBUILD_CFLAGS += $(call cc-option,-falign-jumps=1)
be6cb027	105
52648e83	106	# Pack loops tightly as well:
2c4fd1ac	107	KBUILD_CFLAGS += $(call cc-option,-falign-loops=1)
52648e83	108
5c630089	109	# Don't autogenerate traditional x87 instructions
8f2dd677 BW	110	KBUILD_CFLAGS += $(call cc-option,-mno-80387)
8f2dd677 BW	111	KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)
5551a34e	112
d77698df MK	113	# By default gcc and clang use a stack alignment of 16 bytes for x86.
	114	# However the standard kernel entry on x86-64 leaves the stack on an
	115	# 8-byte boundary. If the compiler isn't informed about the actual
	116	# alignment it will generate extra alignment instructions for the
	117	# default alignment which keep the stack misaligned.
	118	# Furthermore an alignment to the register width reduces stack usage
	119	# and the number of alignment instructions.
9e8730b1	120	KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align8))
d9b0cde9	121
d9ee948d L	122	# Use -mskip-rax-setup if supported.
	123	KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
	124
0a6ef376 SR	125	# FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
	126	cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
	127	cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
	128
	129	cflags-$(CONFIG_MCORE2) += \
	130	$(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
366d19e1 TD	131	cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
366d19e1 TD	132	$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
0a6ef376 SR	133	cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
	134	KBUILD_CFLAGS += $(cflags-y)
	135
	136	KBUILD_CFLAGS += -mno-red-zone
	137	KBUILD_CFLAGS += -mcmodel=kernel
	138
0a6ef376 SR	139	# -funit-at-a-time shrinks the kernel .text considerably
	140	# unfortunately it makes reading oopses harder.
	141	KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
5d707e9c	142	endif
0a6ef376	143
0bf62763 PA	144	ifdef CONFIG_X86_X32
	145	x32_ld_ok := $(call try-run,\
	146	/bin/echo -e '1: .quad 1b' \| \
b1e0d8b7	147	$(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \
0bf62763 PA	148	$(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \
0bf62763 PA	149	$(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n)
8bd69c2d IM	150	ifeq ($(x32_ld_ok),y)
	151	CONFIG_X86_X32_ABI := y
	152	KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI
	153	KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI
	154	else
	155	$(warning CONFIG_X86_X32 enabled but no binutils support)
	156	endif
0bf62763 PA	157	endif
	158	export CONFIG_X86_X32_ABI
	159
dfec072e VN	160	# Don't unroll struct assignments with kmemcheck enabled
	161	ifeq ($(CONFIG_KMEMCHECK),y)
	162	KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy)
	163	endif
	164
3f135e57 JP	165	#
	166	# If the function graph tracer is used with mcount instead of fentry,
	167	# '-maccumulate-outgoing-args' is needed to prevent a GCC bug
	168	# (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42109)
	169	#
	170	ifdef CONFIG_FUNCTION_GRAPH_TRACER
	171	ifndef CONFIG_HAVE_FENTRY
	172	ACCUMULATE_OUTGOING_ARGS := 1
	173	else
	174	ifeq ($(call cc-option-yn, -mfentry), n)
	175	ACCUMULATE_OUTGOING_ARGS := 1
a5859c6d JP	176
	177	# GCC ignores '-maccumulate-outgoing-args' when used with '-Os'.
	178	# If '-Os' is enabled, disable it and print a warning.
	179	ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
	180	undefine CONFIG_CC_OPTIMIZE_FOR_SIZE
7e609120	181	$(warning Disabling CONFIG_CC_OPTIMIZE_FOR_SIZE. Your compiler does not have -mfentry so you cannot optimize for size with CONFIG_FUNCTION_GRAPH_TRACER.)
a5859c6d JP	182	endif
a5859c6d JP	183
3f135e57 JP	184	endif
	185	endif
	186	endif
	187
	188	#
	189	# Jump labels need '-maccumulate-outgoing-args' for gcc < 4.5.2 to prevent a
	190	# GCC bug (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46226). There's no way
	191	# to test for this bug at compile-time because the test case needs to execute,
	192	# which is a no-go for cross compilers. So check the GCC version instead.
	193	#
	194	ifdef CONFIG_JUMP_LABEL
	195	ifneq ($(ACCUMULATE_OUTGOING_ARGS), 1)
	196	ACCUMULATE_OUTGOING_ARGS = $(call cc-if-fullversion, -lt, 040502, 1)
	197	endif
	198	endif
	199
	200	ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1)
4a1bec46 ND	201	# This compiler flag is not supported by Clang:
4a1bec46 ND	202	KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,)
3f135e57 JP	203	endif
3f135e57 JP	204
0a6ef376 SR	205	# Stackpointer is addressed different for 32 bit and 64 bit x86
	206	sp-$(CONFIG_X86_32) := esp
	207	sp-$(CONFIG_X86_64) := rsp
	208
7b956f03 AL	209	# do binutils support CFI?
	210	cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
	211	# is .cfi_signal_frame supported too?
	212	cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
	213	cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1)
	214
d7acb92f PA	215	# does binutils support specific instructions?
d7acb92f PA	216	asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1)
75aaf4c3	217	asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1)
06325190	218	asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1)
ea4d26ae	219	avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1)
7056741f	220	avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1)
e0a491c1	221	avx512_instr :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,-DCONFIG_AS_AVX512=1)
e38b6b7f	222	sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI=1)
e38b6b7f	223	sha256_ni_instr :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA256_NI=1)
d7acb92f	224
e0a491c1 GK	225	KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr)
e0a491c1 GK	226	KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr)
0a6ef376 SR	227
0a6ef376 SR	228	LDFLAGS := -m elf_$(UTS_MACHINE)
25dfeeb7 SR	229
25dfeeb7 SR	230	# Speed up the build
0a6ef376	231	KBUILD_CFLAGS += -pipe
25dfeeb7 SR	232	# Workaround for a gcc prelease that unfortunately was shipped in a suse release
	233	KBUILD_CFLAGS += -Wno-sign-compare
	234	#
	235	KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
0a6ef376	236
3ce9e53e	237	archscripts: scripts_basic
6520fe55 PA	238	$(Q)$(MAKE) $(build)=arch/x86/tools relocs
6520fe55 PA	239
303395ac PA	240	###
	241	# Syscall table generation
	242
	243	archheaders:
1f57d5d8	244	$(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all
303395ac	245
8fc5b4d4	246	archprepare:
74ca317c	247	ifeq ($(CONFIG_KEXEC_FILE),y)
8fc5b4d4	248	$(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c
8fc5b4d4 VG	249	endif
8fc5b4d4 VG	250
0a6ef376 SR	251	###
	252	# Kernel objects
	253
700efc1b EB	254	head-y := arch/x86/kernel/head_$(BITS).o
700efc1b EB	255	head-y += arch/x86/kernel/head$(BITS).o
f2d85299	256	head-y += arch/x86/kernel/ebda.o
8d152e7a	257	head-y += arch/x86/kernel/platform-quirks.o
0a6ef376 SR	258
	259	libs-y += arch/x86/lib/
	260
d1f0ae5e SR	261	# See arch/x86/Kbuild for content of core part of the kernel
d1f0ae5e SR	262	core-y += arch/x86/
0a6ef376 SR	263
	264	# drivers-y are linked after core-y
	265	drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
	266	drivers-$(CONFIG_PCI) += arch/x86/pci/
	267
	268	# must be linked after kernel/
	269	drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
	270
cf7700fe	271	# suspend and hibernation support
0a6ef376	272	drivers-$(CONFIG_PM) += arch/x86/power/
cf7700fe	273
0a6ef376	274	drivers-$(CONFIG_FB) += arch/x86/video/
0a6ef376 SR	275
	276	####
	277	# boot loader support. Several targets are kept for legacy purposes
	278
	279	boot := arch/x86/boot
	280
1648e4f8	281	BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage
f9c5107c PA	282
f9c5107c PA	283	PHONY += bzImage $(BOOT_TARGETS)
0a6ef376 SR	284
	285	# Default kernel to build
	286	all: bzImage
	287
	288	# KBUILD_IMAGE specify target image being built
f9c5107c	289	KBUILD_IMAGE := $(boot)/bzImage
0a6ef376	290
f9c5107c	291	bzImage: vmlinux
ca0e9bad MH	292	ifeq ($(CONFIG_X86_DECODER_SELFTEST),y)
	293	$(Q)$(MAKE) $(build)=arch/x86/tools posttest
	294	endif
0a6ef376 SR	295	$(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
0a6ef376 SR	296	$(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
41b3eae6	297	$(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
0a6ef376	298
f9c5107c PA	299	$(BOOT_TARGETS): vmlinux
f9c5107c PA	300	$(Q)$(MAKE) $(build)=$(boot) $@
0a6ef376	301
1648e4f8 PA	302	PHONY += install
	303	install:
	304	$(Q)$(MAKE) $(build)=$(boot) $@
	305
0a6ef376 SR	306	PHONY += vdso_install
0a6ef376 SR	307	vdso_install:
d603c8e1	308	$(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@
0a6ef376 SR	309
	310	archclean:
	311	$(Q)rm -rf $(objtree)/arch/i386
	312	$(Q)rm -rf $(objtree)/arch/x86_64
	313	$(Q)$(MAKE) $(clean)=$(boot)
b2d668da	314	$(Q)$(MAKE) $(clean)=arch/x86/tools
b0108f9e	315	$(Q)$(MAKE) $(clean)=arch/x86/purgatory
0a6ef376 SR	316
0a6ef376 SR	317	define archhelp
37f30e21 AK	318	echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
37f30e21 AK	319	echo ' install - Install kernel using'
caa27b66 SR	320	echo ' (your) ~/bin/$(INSTALLKERNEL) or'
caa27b66 SR	321	echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
37f30e21 AK	322	echo ' install to $$(INSTALL_PATH) and run lilo'
	323	echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
	324	echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
	325	echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
	326	echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
	327	echo ' bzdisk/fdimage*/isoimage also accept:'
	328	echo ' FDARGS="..." arguments for the booted kernel'
	329	echo ' FDINITRD=file initrd for the booted kernel'
0a6ef376	330	endef