tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1# Unified Makefile for i386 and x86_64
2
3# select defconfig based on actual architecture
4ifeq ($(ARCH),x86)
5 KBUILD_DEFCONFIG := i386_defconfig
6else
7 KBUILD_DEFCONFIG := $(ARCH)_defconfig
8endif
9
10core-$(CONFIG_KVM) += arch/x86/kvm/
11
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_$(BITS).o
15export BITS
16
17ifeq ($(CONFIG_X86_32),y)
18 BITS := 32
19 UTS_MACHINE := i386
20 CHECKFLAGS += -D__i386__
21
22 biarch := $(call cc-option,-m32)
23 KBUILD_AFLAGS += $(biarch)
24 KBUILD_CFLAGS += $(biarch)
25
26 ifdef CONFIG_RELOCATABLE
27 LDFLAGS_vmlinux := --emit-relocs
28 endif
29
30 KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
31
32 # prevent gcc from keeping the stack 16 byte aligned
33 KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
34
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 ;)
39
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 += $(cflags-y)
43
44 # temporary until string.h is fixed
45 KBUILD_CFLAGS += -ffreestanding
46else
47 BITS := 64
48 UTS_MACHINE := x86_64
49 CHECKFLAGS += -D__x86_64__ -m64
50
51 KBUILD_AFLAGS += -m64
52 KBUILD_CFLAGS += -m64
53
54 # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
55 cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
56 cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
57
58 cflags-$(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)
62
63 KBUILD_CFLAGS += -mno-red-zone
64 KBUILD_CFLAGS += -mcmodel=kernel
65
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)
69
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
73
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 )
79
80 KBUILD_CFLAGS += $(stackp-y)
81endif
82
83# Stackpointer is addressed different for 32 bit and 64 bit x86
84sp-$(CONFIG_X86_32) := esp
85sp-$(CONFIG_X86_64) := rsp
86
87# do binutils support CFI?
88cfi := $(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?
90cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
91KBUILD_AFLAGS += $(cfi) $(cfi-sigframe)
92KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
93
94LDFLAGS := -m elf_$(UTS_MACHINE)
95OBJCOPYFLAGS := -O binary -R .note -R .comment -S
96
97# Speed up the build
98KBUILD_CFLAGS += -pipe
99# Workaround for a gcc prelease that unfortunately was shipped in a suse release
100KBUILD_CFLAGS += -Wno-sign-compare
101#
102KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
103# prevent gcc from generating any FP code by mistake
104KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
105
106###
107# Sub architecture support
108# fcore-y is linked before mcore-y files.
109
110# Default subarch .c files
111mcore-y := arch/x86/mach-default/
112
113# Voyager subarch support
114mflags-$(CONFIG_X86_VOYAGER) := -Iinclude/asm-x86/mach-voyager
115mcore-$(CONFIG_X86_VOYAGER) := arch/x86/mach-voyager/
116
117# VISWS subarch support
118mflags-$(CONFIG_X86_VISWS) := -Iinclude/asm-x86/mach-visws
119mcore-$(CONFIG_X86_VISWS) := arch/x86/mach-visws/
120
121# NUMAQ subarch support
122mflags-$(CONFIG_X86_NUMAQ) := -Iinclude/asm-x86/mach-numaq
123mcore-$(CONFIG_X86_NUMAQ) := arch/x86/mach-default/
124
125# BIGSMP subarch support
126mflags-$(CONFIG_X86_BIGSMP) := -Iinclude/asm-x86/mach-bigsmp
127mcore-$(CONFIG_X86_BIGSMP) := arch/x86/mach-default/
128
129#Summit subarch support
130mflags-$(CONFIG_X86_SUMMIT) := -Iinclude/asm-x86/mach-summit
131mcore-$(CONFIG_X86_SUMMIT) := arch/x86/mach-default/
132
133# generic subarchitecture
134mflags-$(CONFIG_X86_GENERICARCH):= -Iinclude/asm-x86/mach-generic
135fcore-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/
136mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default/
137
138
139# ES7000 subarch support
140mflags-$(CONFIG_X86_ES7000) := -Iinclude/asm-x86/mach-es7000
141fcore-$(CONFIG_X86_ES7000) := arch/x86/mach-es7000/
142mcore-$(CONFIG_X86_ES7000) := arch/x86/mach-default/
143
144# RDC R-321x subarch support
145mflags-$(CONFIG_X86_RDC321X) := -Iinclude/asm-x86/mach-rdc321x
146mcore-$(CONFIG_X86_RDC321X) := arch/x86/mach-default/
147core-$(CONFIG_X86_RDC321X) += arch/x86/mach-rdc321x/
148
149# default subarch .h files
150mflags-y += -Iinclude/asm-x86/mach-default
151
152# 64 bit does not support subarch support - clear sub arch variables
153fcore-$(CONFIG_X86_64) :=
154mcore-$(CONFIG_X86_64) :=
155mflags-$(CONFIG_X86_64) :=
156
157KBUILD_CFLAGS += $(mflags-y)
158KBUILD_AFLAGS += $(mflags-y)
159
160###
161# Kernel objects
162
163head-y := arch/x86/kernel/head_$(BITS).o
164head-$(CONFIG_X86_64) += arch/x86/kernel/head64.o
165head-y += arch/x86/kernel/init_task.o
166
167libs-y += arch/x86/lib/
168
169# Sub architecture files that needs linking first
170core-y += $(fcore-y)
171
172# Xen paravirtualization support
173core-$(CONFIG_XEN) += arch/x86/xen/
174
175# lguest paravirtualization support
176core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/
177
178core-y += arch/x86/kernel/
179core-y += arch/x86/mm/
180
181# Remaining sub architecture files
182core-y += $(mcore-y)
183
184core-y += arch/x86/crypto/
185core-y += arch/x86/vdso/
186core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
187
188# drivers-y are linked after core-y
189drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
190drivers-$(CONFIG_PCI) += arch/x86/pci/
191
192# must be linked after kernel/
193drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
194
195ifeq ($(CONFIG_X86_32),y)
196drivers-$(CONFIG_PM) += arch/x86/power/
197drivers-$(CONFIG_FB) += arch/x86/video/
198endif
199
200####
201# boot loader support. Several targets are kept for legacy purposes
202
203boot := arch/x86/boot
204
205PHONY += zImage bzImage compressed zlilo bzlilo \
206 zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
207
208# Default kernel to build
209all: bzImage
210
211# KBUILD_IMAGE specify target image being built
212 KBUILD_IMAGE := $(boot)/bzImage
213zImage zlilo zdisk: KBUILD_IMAGE := arch/x86/boot/zImage
214
215zImage bzImage: vmlinux
216 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
217 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
218 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/bzImage
219
220compressed: zImage
221
222zlilo bzlilo: vmlinux
223 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo
224
225zdisk bzdisk: vmlinux
226 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk
227
228fdimage fdimage144 fdimage288 isoimage: vmlinux
229 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
230
231install: vdso_install
232 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
233
234PHONY += vdso_install
235vdso_install:
236 $(Q)$(MAKE) $(build)=arch/x86/vdso $@
237
238archclean:
239 $(Q)rm -rf $(objtree)/arch/i386
240 $(Q)rm -rf $(objtree)/arch/x86_64
241 $(Q)$(MAKE) $(clean)=$(boot)
242
243define archhelp
244 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
245 echo ' install - Install kernel using'
246 echo ' (your) ~/bin/installkernel or'
247 echo ' (distribution) /sbin/installkernel or'
248 echo ' install to $$(INSTALL_PATH) and run lilo'
249 echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
250 echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
251 echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
252 echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
253 echo ' bzdisk/fdimage*/isoimage also accept:'
254 echo ' FDARGS="..." arguments for the booted kernel'
255 echo ' FDINITRD=file initrd for the booted kernel'
256endef
257
258CLEAN_FILES += arch/x86/boot/fdimage \
259 arch/x86/boot/image.iso \
260 arch/x86/boot/mtools.conf