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1 | # Unified Makefile for i386 and x86_64 |
2 | |
3 | # select defconfig based on actual architecture |
4 | ifeq ($(ARCH),x86) |
5 | KBUILD_DEFCONFIG := i386_defconfig |
6 | else |
7 | KBUILD_DEFCONFIG := $(ARCH)_defconfig |
8 | endif |
9 | |
10 | # BITS is used as extension for files which are available in a 32 bit |
11 | # and a 64 bit version to simplify shared Makefiles. |
12 | # e.g.: obj-y += foo_$(BITS).o |
13 | export BITS |
14 | |
15 | ifeq ($(CONFIG_X86_32),y) |
16 | BITS := 32 |
17 | UTS_MACHINE := i386 |
18 | CHECKFLAGS += -D__i386__ |
19 | |
20 | biarch := $(call cc-option,-m32) |
21 | KBUILD_AFLAGS += $(biarch) |
22 | KBUILD_CFLAGS += $(biarch) |
23 | |
24 | ifdef CONFIG_RELOCATABLE |
25 | LDFLAGS_vmlinux := --emit-relocs |
26 | endif |
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 += $(call cc-ifversion, -lt, 0400, \ |
36 | $(call cc-option,-fno-unit-at-a-time)) |
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 += $(cflags-y) |
41 | |
42 | # temporary until string.h is fixed |
43 | KBUILD_CFLAGS += -ffreestanding |
44 | else |
45 | BITS := 64 |
46 | UTS_MACHINE := x86_64 |
47 | CHECKFLAGS += -D__x86_64__ -m64 |
48 | |
49 | KBUILD_AFLAGS += -m64 |
50 | KBUILD_CFLAGS += -m64 |
51 | |
52 | # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) |
53 | cflags-$(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_MATOM) += $(call cc-option,-march=atom) \ |
59 | $(call cc-option,-mtune=atom,$(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 | endif |
74 | |
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) $(KBUILD_CPPFLAGS) $(biarch)),y) |
78 | stackp-y := -fstack-protector |
79 | KBUILD_CFLAGS += $(stackp-y) |
80 | else |
81 | $(warning stack protector enabled but no compiler support) |
82 | endif |
83 | endif |
84 | |
85 | # Don't unroll struct assignments with kmemcheck enabled |
86 | ifeq ($(CONFIG_KMEMCHECK),y) |
87 | KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy) |
88 | endif |
89 | |
90 | # Stackpointer is addressed different for 32 bit and 64 bit x86 |
91 | sp-$(CONFIG_X86_32) := esp |
92 | sp-$(CONFIG_X86_64) := rsp |
93 | |
94 | # do binutils support CFI? |
95 | cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1) |
96 | # is .cfi_signal_frame supported too? |
97 | cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1) |
98 | cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1) |
99 | KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) |
100 | KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) |
101 | |
102 | LDFLAGS := -m elf_$(UTS_MACHINE) |
103 | |
104 | # Speed up the build |
105 | KBUILD_CFLAGS += -pipe |
106 | # Workaround for a gcc prelease that unfortunately was shipped in a suse release |
107 | KBUILD_CFLAGS += -Wno-sign-compare |
108 | # |
109 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables |
110 | # prevent gcc from generating any FP code by mistake |
111 | KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,) |
112 | |
113 | KBUILD_CFLAGS += $(mflags-y) |
114 | KBUILD_AFLAGS += $(mflags-y) |
115 | |
116 | ### |
117 | # Kernel objects |
118 | |
119 | head-y := arch/x86/kernel/head_$(BITS).o |
120 | head-y += arch/x86/kernel/head$(BITS).o |
121 | head-y += arch/x86/kernel/head.o |
122 | head-y += arch/x86/kernel/init_task.o |
123 | |
124 | libs-y += arch/x86/lib/ |
125 | |
126 | # See arch/x86/Kbuild for content of core part of the kernel |
127 | core-y += arch/x86/ |
128 | |
129 | # drivers-y are linked after core-y |
130 | drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/ |
131 | drivers-$(CONFIG_PCI) += arch/x86/pci/ |
132 | |
133 | # must be linked after kernel/ |
134 | drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/ |
135 | |
136 | # suspend and hibernation support |
137 | drivers-$(CONFIG_PM) += arch/x86/power/ |
138 | |
139 | drivers-$(CONFIG_FB) += arch/x86/video/ |
140 | |
141 | #### |
142 | # boot loader support. Several targets are kept for legacy purposes |
143 | |
144 | boot := arch/x86/boot |
145 | |
146 | BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage |
147 | |
148 | PHONY += bzImage $(BOOT_TARGETS) |
149 | |
150 | # Default kernel to build |
151 | all: bzImage |
152 | |
153 | # KBUILD_IMAGE specify target image being built |
154 | KBUILD_IMAGE := $(boot)/bzImage |
155 | |
156 | bzImage: vmlinux |
157 | ifeq ($(CONFIG_X86_DECODER_SELFTEST),y) |
158 | $(Q)$(MAKE) $(build)=arch/x86/tools posttest |
159 | endif |
160 | $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE) |
161 | $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot |
162 | $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@ |
163 | |
164 | $(BOOT_TARGETS): vmlinux |
165 | $(Q)$(MAKE) $(build)=$(boot) $@ |
166 | |
167 | PHONY += install |
168 | install: |
169 | $(Q)$(MAKE) $(build)=$(boot) $@ |
170 | |
171 | PHONY += vdso_install |
172 | vdso_install: |
173 | $(Q)$(MAKE) $(build)=arch/x86/vdso $@ |
174 | |
175 | archclean: |
176 | $(Q)rm -rf $(objtree)/arch/i386 |
177 | $(Q)rm -rf $(objtree)/arch/x86_64 |
178 | $(Q)$(MAKE) $(clean)=$(boot) |
179 | |
180 | define archhelp |
181 | echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)' |
182 | echo ' install - Install kernel using' |
183 | echo ' (your) ~/bin/$(INSTALLKERNEL) or' |
184 | echo ' (distribution) /sbin/$(INSTALLKERNEL) or' |
185 | echo ' install to $$(INSTALL_PATH) and run lilo' |
186 | echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' |
187 | echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' |
188 | echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)' |
189 | echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)' |
190 | echo ' bzdisk/fdimage*/isoimage also accept:' |
191 | echo ' FDARGS="..." arguments for the booted kernel' |
192 | echo ' FDINITRD=file initrd for the booted kernel' |
193 | endef |
194 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9