Commit | Line | Data |
---|---|---|
74b469f2 SR |
1 | # Unified Makefile for i386 and x86_64 |
2 | ||
2266cfd5 | 3 | # select defconfig based on actual architecture |
d746d647 SR |
4 | ifeq ($(ARCH),x86) |
5 | KBUILD_DEFCONFIG := i386_defconfig | |
6 | else | |
7 | KBUILD_DEFCONFIG := $(ARCH)_defconfig | |
8 | endif | |
2266cfd5 | 9 | |
0a6ef376 SR |
10 | # BITS is used as extension for files which are available in a 32 bit |
11 | # and a 64 bit version to simplify shared Makefiles. | |
12 | # e.g.: obj-y += foo_$(BITS).o | |
13 | export BITS | |
74b469f2 | 14 | |
d746d647 | 15 | ifeq ($(CONFIG_X86_32),y) |
0a6ef376 | 16 | BITS := 32 |
8c6531f7 | 17 | UTS_MACHINE := i386 |
4ba7e5cd | 18 | CHECKFLAGS += -D__i386__ |
0a6ef376 | 19 | |
4ba7e5cd SR |
20 | biarch := $(call cc-option,-m32) |
21 | KBUILD_AFLAGS += $(biarch) | |
22 | KBUILD_CFLAGS += $(biarch) | |
0a6ef376 SR |
23 | |
24 | ifdef CONFIG_RELOCATABLE | |
25 | LDFLAGS_vmlinux := --emit-relocs | |
26 | endif | |
0a6ef376 SR |
27 | |
28 | KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return | |
29 | ||
30 | # prevent gcc from keeping the stack 16 byte aligned | |
31 | KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2) | |
32 | ||
33 | # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use | |
34 | # a lot more stack due to the lack of sharing of stacklots: | |
35 | KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \ | |
36 | echo $(call cc-option,-fno-unit-at-a-time); fi ;) | |
37 | ||
38 | # CPU-specific tuning. Anything which can be shared with UML should go here. | |
39 | include $(srctree)/arch/x86/Makefile_32.cpu | |
40 | KBUILD_CFLAGS += $(cflags-y) | |
41 | ||
42 | # temporary until string.h is fixed | |
43 | KBUILD_CFLAGS += -ffreestanding | |
74b469f2 | 44 | else |
0a6ef376 | 45 | BITS := 64 |
8c6531f7 | 46 | UTS_MACHINE := x86_64 |
0a6ef376 SR |
47 | CHECKFLAGS += -D__x86_64__ -m64 |
48 | ||
49 | KBUILD_AFLAGS += -m64 | |
50 | KBUILD_CFLAGS += -m64 | |
51 | ||
52 | # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) | |
53 | cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) | |
54 | cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) | |
55 | ||
56 | cflags-$(CONFIG_MCORE2) += \ | |
57 | $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) | |
58 | cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) | |
59 | KBUILD_CFLAGS += $(cflags-y) | |
60 | ||
61 | KBUILD_CFLAGS += -mno-red-zone | |
62 | KBUILD_CFLAGS += -mcmodel=kernel | |
63 | ||
0a6ef376 SR |
64 | # -funit-at-a-time shrinks the kernel .text considerably |
65 | # unfortunately it makes reading oopses harder. | |
66 | KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) | |
67 | ||
0a6ef376 SR |
68 | # this works around some issues with generating unwind tables in older gccs |
69 | # newer gccs do it by default | |
70 | KBUILD_CFLAGS += -maccumulate-outgoing-args | |
5d707e9c | 71 | endif |
0a6ef376 | 72 | |
5d707e9c TH |
73 | ifdef CONFIG_CC_STACKPROTECTOR |
74 | cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh | |
75 | ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC)),y) | |
76 | stackp-y := -fstack-protector | |
77 | stackp-$(CONFIG_CC_STACKPROTECTOR_ALL) += -fstack-protector-all | |
78 | KBUILD_CFLAGS += $(stackp-y) | |
79 | else | |
80 | $(warning stack protector enabled but no compiler support) | |
81 | endif | |
0a6ef376 SR |
82 | endif |
83 | ||
dfec072e VN |
84 | # Don't unroll struct assignments with kmemcheck enabled |
85 | ifeq ($(CONFIG_KMEMCHECK),y) | |
86 | KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy) | |
87 | endif | |
88 | ||
0a6ef376 SR |
89 | # Stackpointer is addressed different for 32 bit and 64 bit x86 |
90 | sp-$(CONFIG_X86_32) := esp | |
91 | sp-$(CONFIG_X86_64) := rsp | |
92 | ||
93 | # do binutils support CFI? | |
94 | cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1) | |
95 | # is .cfi_signal_frame supported too? | |
96 | cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1) | |
97 | KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) | |
98 | KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) | |
99 | ||
100 | LDFLAGS := -m elf_$(UTS_MACHINE) | |
25dfeeb7 SR |
101 | |
102 | # Speed up the build | |
0a6ef376 | 103 | KBUILD_CFLAGS += -pipe |
25dfeeb7 SR |
104 | # Workaround for a gcc prelease that unfortunately was shipped in a suse release |
105 | KBUILD_CFLAGS += -Wno-sign-compare | |
106 | # | |
107 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables | |
108 | # prevent gcc from generating any FP code by mistake | |
109 | KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,) | |
0a6ef376 | 110 | |
0a6ef376 SR |
111 | KBUILD_CFLAGS += $(mflags-y) |
112 | KBUILD_AFLAGS += $(mflags-y) | |
113 | ||
114 | ### | |
115 | # Kernel objects | |
116 | ||
700efc1b EB |
117 | head-y := arch/x86/kernel/head_$(BITS).o |
118 | head-y += arch/x86/kernel/head$(BITS).o | |
0c51a965 | 119 | head-y += arch/x86/kernel/head.o |
700efc1b | 120 | head-y += arch/x86/kernel/init_task.o |
0a6ef376 SR |
121 | |
122 | libs-y += arch/x86/lib/ | |
123 | ||
d1f0ae5e SR |
124 | # See arch/x86/Kbuild for content of core part of the kernel |
125 | core-y += arch/x86/ | |
0a6ef376 SR |
126 | |
127 | # drivers-y are linked after core-y | |
128 | drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/ | |
129 | drivers-$(CONFIG_PCI) += arch/x86/pci/ | |
130 | ||
131 | # must be linked after kernel/ | |
132 | drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/ | |
133 | ||
cf7700fe | 134 | # suspend and hibernation support |
0a6ef376 | 135 | drivers-$(CONFIG_PM) += arch/x86/power/ |
cf7700fe RW |
136 | |
137 | ifeq ($(CONFIG_X86_32),y) | |
0a6ef376 | 138 | drivers-$(CONFIG_FB) += arch/x86/video/ |
74b469f2 | 139 | endif |
0a6ef376 SR |
140 | |
141 | #### | |
142 | # boot loader support. Several targets are kept for legacy purposes | |
143 | ||
144 | boot := arch/x86/boot | |
145 | ||
1648e4f8 | 146 | BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage |
f9c5107c PA |
147 | |
148 | PHONY += bzImage $(BOOT_TARGETS) | |
0a6ef376 SR |
149 | |
150 | # Default kernel to build | |
151 | all: bzImage | |
152 | ||
153 | # KBUILD_IMAGE specify target image being built | |
f9c5107c | 154 | KBUILD_IMAGE := $(boot)/bzImage |
0a6ef376 | 155 | |
f9c5107c | 156 | bzImage: vmlinux |
0a6ef376 SR |
157 | $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE) |
158 | $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot | |
41b3eae6 | 159 | $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@ |
0a6ef376 | 160 | |
f9c5107c PA |
161 | $(BOOT_TARGETS): vmlinux |
162 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
0a6ef376 | 163 | |
1648e4f8 PA |
164 | PHONY += install |
165 | install: | |
166 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
167 | ||
0a6ef376 SR |
168 | PHONY += vdso_install |
169 | vdso_install: | |
170 | $(Q)$(MAKE) $(build)=arch/x86/vdso $@ | |
171 | ||
172 | archclean: | |
173 | $(Q)rm -rf $(objtree)/arch/i386 | |
174 | $(Q)rm -rf $(objtree)/arch/x86_64 | |
175 | $(Q)$(MAKE) $(clean)=$(boot) | |
176 | ||
177 | define archhelp | |
37f30e21 AK |
178 | echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)' |
179 | echo ' install - Install kernel using' | |
180 | echo ' (your) ~/bin/installkernel or' | |
181 | echo ' (distribution) /sbin/installkernel or' | |
182 | echo ' install to $$(INSTALL_PATH) and run lilo' | |
183 | echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
184 | echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
185 | echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)' | |
186 | echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)' | |
187 | echo ' bzdisk/fdimage*/isoimage also accept:' | |
188 | echo ' FDARGS="..." arguments for the booted kernel' | |
189 | echo ' FDINITRD=file initrd for the booted kernel' | |
0a6ef376 | 190 | endef |