1 # Unified Makefile for i386 and x86_64
3 # select defconfig based on actual architecture
5 KBUILD_DEFCONFIG
:= i386_defconfig
7 KBUILD_DEFCONFIG
:= $(ARCH
)_defconfig
10 core-
$(CONFIG_KVM
) += arch
/x86
/kvm
/
12 # BITS is used as extension for files which are available in a 32 bit
13 # and a 64 bit version to simplify shared Makefiles.
14 # e.g.: obj-y += foo_$(BITS).o
17 ifeq ($(CONFIG_X86_32
),y
)
20 CHECKFLAGS
+= -D__i386__
22 biarch
:= $(call cc-option
,-m32
)
23 KBUILD_AFLAGS
+= $(biarch
)
24 KBUILD_CFLAGS
+= $(biarch
)
26 ifdef CONFIG_RELOCATABLE
27 LDFLAGS_vmlinux
:= --emit-relocs
30 KBUILD_CFLAGS
+= -msoft-float
-mregparm
=3 -freg-struct-return
32 # prevent gcc from keeping the stack 16 byte aligned
33 KBUILD_CFLAGS
+= $(call cc-option
,-mpreferred-stack-boundary
=2)
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
;)
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
)
44 # temporary until string.h is fixed
45 KBUILD_CFLAGS
+= -ffreestanding
49 CHECKFLAGS
+= -D__x86_64__
-m64
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
)
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
)
63 KBUILD_CFLAGS
+= -mno-red-zone
64 KBUILD_CFLAGS
+= -mcmodel
=kernel
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
)
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
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
)
80 KBUILD_CFLAGS
+= $(stackp-y
)
83 # Stackpointer is addressed different for 32 bit and 64 bit x86
84 sp-
$(CONFIG_X86_32
) := esp
85 sp-
$(CONFIG_X86_64
) := rsp
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
)
94 LDFLAGS
:= -m elf_
$(UTS_MACHINE
)
97 KBUILD_CFLAGS
+= -pipe
98 # Workaround for a gcc prelease that unfortunately was shipped in a suse release
99 KBUILD_CFLAGS
+= -Wno-sign-compare
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
,)
106 # Sub architecture support
107 # fcore-y is linked before mcore-y files.
109 # Default subarch .c files
110 mcore-y
:= arch
/x86
/mach-default
/
112 # Voyager subarch support
113 mflags-
$(CONFIG_X86_VOYAGER
) := -Iarch
/x86
/include/asm
/mach-voyager
114 mcore-
$(CONFIG_X86_VOYAGER
) := arch
/x86
/mach-voyager
/
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
/
121 # default subarch .h files
122 mflags-y
+= -Iarch
/x86
/include/asm
/mach-default
124 # 64 bit does not support subarch support - clear sub arch variables
125 fcore-
$(CONFIG_X86_64
) :=
126 mcore-
$(CONFIG_X86_64
) :=
128 KBUILD_CFLAGS
+= $(mflags-y
)
129 KBUILD_AFLAGS
+= $(mflags-y
)
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
139 libs-y
+= arch
/x86
/lib
/
141 # Sub architecture files that needs linking first
144 # Xen paravirtualization support
145 core-
$(CONFIG_XEN
) += arch
/x86
/xen
/
147 # lguest paravirtualization support
148 core-
$(CONFIG_LGUEST_GUEST
) += arch
/x86
/lguest
/
150 core-y
+= arch
/x86
/kernel
/
151 core-y
+= arch
/x86
/mm
/
153 # Remaining sub architecture files
156 core-y
+= arch
/x86
/crypto
/
157 core-y
+= arch
/x86
/vdso
/
158 core-
$(CONFIG_IA32_EMULATION
) += arch
/x86
/ia32
/
160 # drivers-y are linked after core-y
161 drivers-
$(CONFIG_MATH_EMULATION
) += arch
/x86
/math-emu
/
162 drivers-
$(CONFIG_PCI
) += arch
/x86
/pci
/
164 # must be linked after kernel/
165 drivers-
$(CONFIG_OPROFILE
) += arch
/x86
/oprofile
/
167 # suspend and hibernation support
168 drivers-
$(CONFIG_PM
) += arch
/x86
/power
/
170 ifeq ($(CONFIG_X86_32
),y
)
171 drivers-
$(CONFIG_FB
) += arch
/x86
/video
/
175 # boot loader support. Several targets are kept for legacy purposes
177 boot
:= arch
/x86
/boot
179 PHONY
+= zImage bzImage compressed zlilo bzlilo \
180 zdisk bzdisk fdimage fdimage144 fdimage288 isoimage
install
182 # Default kernel to build
185 # KBUILD_IMAGE specify target image being built
186 KBUILD_IMAGE
:= $(boot
)/bzImage
187 zImage zlilo zdisk
: KBUILD_IMAGE
:= $(boot
)/zImage
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
/$@
196 zlilo bzlilo
: vmlinux
197 $(Q
)$(MAKE
) $(build
)=$(boot
) BOOTIMAGE
=$(KBUILD_IMAGE
) zlilo
199 zdisk bzdisk
: vmlinux
200 $(Q
)$(MAKE
) $(build
)=$(boot
) BOOTIMAGE
=$(KBUILD_IMAGE
) zdisk
202 fdimage fdimage144 fdimage288 isoimage
: vmlinux
203 $(Q
)$(MAKE
) $(build
)=$(boot
) BOOTIMAGE
=$(KBUILD_IMAGE
) $@
206 $(Q
)$(MAKE
) $(build
)=$(boot
) BOOTIMAGE
=$(KBUILD_IMAGE
) install
208 PHONY
+= vdso_install
210 $(Q
)$(MAKE
) $(build
)=arch
/x86
/vdso
$@
213 $(Q
)rm -rf
$(objtree
)/arch
/i386
214 $(Q
)rm -rf
$(objtree
)/arch
/x86_64
215 $(Q
)$(MAKE
) $(clean)=$(boot
)
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'
232 CLEAN_FILES
+= arch
/x86
/boot
/fdimage \
233 arch
/x86
/boot
/image.iso \
234 arch
/x86
/boot
/mtools.conf