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
75 ifdef CONFIG_CC_STACKPROTECTOR
76 cc_has_sp
:= $(srctree
)/scripts
/gcc-x86_
$(BITS
)-has-stack-protector.sh
77 ifeq ($(shell $(CONFIG_SHELL
) $(cc_has_sp
) $(CC
)),y
)
78 stackp-y
:= -fstack-protector
79 stackp-
$(CONFIG_CC_STACKPROTECTOR_ALL
) += -fstack-protector-all
80 KBUILD_CFLAGS
+= $(stackp-y
)
82 $(warning stack protector enabled but no compiler support
)
86 # Stackpointer is addressed different for 32 bit and 64 bit x86
87 sp-
$(CONFIG_X86_32
) := esp
88 sp-
$(CONFIG_X86_64
) := rsp
90 # do binutils support CFI?
91 cfi
:= $(call as-instr
,.cfi_startproc
\n.cfi_rel_offset
$(sp-y
)$(comma
)0\n.cfi_endproc
,-DCONFIG_AS_CFI
=1)
92 # is .cfi_signal_frame supported too?
93 cfi-sigframe
:= $(call as-instr
,.cfi_startproc
\n.cfi_signal_frame
\n.cfi_endproc
,-DCONFIG_AS_CFI_SIGNAL_FRAME
=1)
94 KBUILD_AFLAGS
+= $(cfi
) $(cfi-sigframe
)
95 KBUILD_CFLAGS
+= $(cfi
) $(cfi-sigframe
)
97 LDFLAGS
:= -m elf_
$(UTS_MACHINE
)
100 KBUILD_CFLAGS
+= -pipe
101 # Workaround for a gcc prelease that unfortunately was shipped in a suse release
102 KBUILD_CFLAGS
+= -Wno-sign-compare
104 KBUILD_CFLAGS
+= -fno-asynchronous-unwind-tables
105 # prevent gcc from generating any FP code by mistake
106 KBUILD_CFLAGS
+= $(call cc-option
,-mno-sse
-mno-mmx
-mno-sse2
-mno-3dnow
,)
108 KBUILD_CFLAGS
+= $(mflags-y
)
109 KBUILD_AFLAGS
+= $(mflags-y
)
114 head-y
:= arch
/x86
/kernel
/head_
$(BITS
).o
115 head-y
+= arch
/x86
/kernel
/head
$(BITS
).o
116 head-y
+= arch
/x86
/kernel
/head.o
117 head-y
+= arch
/x86
/kernel
/init_task.o
119 libs-y
+= arch
/x86
/lib
/
121 # Sub architecture files that needs linking first
124 # Xen paravirtualization support
125 core-
$(CONFIG_XEN
) += arch
/x86
/xen
/
127 # lguest paravirtualization support
128 core-
$(CONFIG_LGUEST_GUEST
) += arch
/x86
/lguest
/
130 core-y
+= arch
/x86
/kernel
/
131 core-y
+= arch
/x86
/mm
/
133 core-y
+= arch
/x86
/crypto
/
134 core-y
+= arch
/x86
/vdso
/
135 core-
$(CONFIG_IA32_EMULATION
) += arch
/x86
/ia32
/
137 # drivers-y are linked after core-y
138 drivers-
$(CONFIG_MATH_EMULATION
) += arch
/x86
/math-emu
/
139 drivers-
$(CONFIG_PCI
) += arch
/x86
/pci
/
141 # must be linked after kernel/
142 drivers-
$(CONFIG_OPROFILE
) += arch
/x86
/oprofile
/
144 # suspend and hibernation support
145 drivers-
$(CONFIG_PM
) += arch
/x86
/power
/
147 ifeq ($(CONFIG_X86_32
),y
)
148 drivers-
$(CONFIG_FB
) += arch
/x86
/video
/
152 # boot loader support. Several targets are kept for legacy purposes
154 boot
:= arch
/x86
/boot
156 BOOT_TARGETS
= bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage
158 PHONY
+= bzImage
$(BOOT_TARGETS
)
160 # Default kernel to build
163 # KBUILD_IMAGE specify target image being built
164 KBUILD_IMAGE
:= $(boot
)/bzImage
167 $(Q
)$(MAKE
) $(build
)=$(boot
) $(KBUILD_IMAGE
)
168 $(Q
)mkdir
-p
$(objtree
)/arch
/$(UTS_MACHINE
)/boot
169 $(Q
)ln
-fsn ..
/..
/x86
/boot
/bzImage
$(objtree
)/arch
/$(UTS_MACHINE
)/boot
/$@
171 $(BOOT_TARGETS
): vmlinux
172 $(Q
)$(MAKE
) $(build
)=$(boot
) $@
176 $(Q
)$(MAKE
) $(build
)=$(boot
) $@
178 PHONY
+= vdso_install
180 $(Q
)$(MAKE
) $(build
)=arch
/x86
/vdso
$@
183 $(Q
)rm -rf
$(objtree
)/arch
/i386
184 $(Q
)rm -rf
$(objtree
)/arch
/x86_64
185 $(Q
)$(MAKE
) $(clean)=$(boot
)
188 echo
'* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
189 echo
' install - Install kernel using'
190 echo
' (your) ~/bin/installkernel or'
191 echo
' (distribution) /sbin/installkernel or'
192 echo
' install to $$(INSTALL_PATH) and run lilo'
193 echo
' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
194 echo
' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
195 echo
' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
196 echo
' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
197 echo
' bzdisk/fdimage*/isoimage also accept:'
198 echo
' FDARGS="..." arguments for the booted kernel'
199 echo
' FDINITRD=file initrd for the booted kernel'