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1 | # Unified Makefile for i386 and x86_64 | |
2 | ||
3 | # select defconfig based on actual architecture | |
4 | ifeq ($(ARCH),x86) | |
5 | ifeq ($(shell uname -m),x86_64) | |
6 | KBUILD_DEFCONFIG := x86_64_defconfig | |
7 | else | |
8 | KBUILD_DEFCONFIG := i386_defconfig | |
9 | endif | |
10 | else | |
11 | KBUILD_DEFCONFIG := $(ARCH)_defconfig | |
12 | endif | |
13 | ||
14 | # BITS is used as extension for files which are available in a 32 bit | |
15 | # and a 64 bit version to simplify shared Makefiles. | |
16 | # e.g.: obj-y += foo_$(BITS).o | |
17 | export BITS | |
18 | ||
19 | ifdef CONFIG_X86_NEED_RELOCS | |
20 | LDFLAGS_vmlinux := --emit-relocs | |
21 | endif | |
22 | ||
23 | ifeq ($(CONFIG_X86_32),y) | |
24 | BITS := 32 | |
25 | UTS_MACHINE := i386 | |
26 | CHECKFLAGS += -D__i386__ | |
27 | ||
28 | biarch := $(call cc-option,-m32) | |
29 | KBUILD_AFLAGS += $(biarch) | |
30 | KBUILD_CFLAGS += $(biarch) | |
31 | ||
32 | KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return | |
33 | ||
34 | # Never want PIC in a 32-bit kernel, prevent breakage with GCC built | |
35 | # with nonstandard options | |
36 | KBUILD_CFLAGS += -fno-pic | |
37 | ||
38 | # prevent gcc from keeping the stack 16 byte aligned | |
39 | KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2) | |
40 | ||
41 | # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use | |
42 | # a lot more stack due to the lack of sharing of stacklots: | |
43 | KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \ | |
44 | $(call cc-option,-fno-unit-at-a-time)) | |
45 | ||
46 | # CPU-specific tuning. Anything which can be shared with UML should go here. | |
47 | include $(srctree)/arch/x86/Makefile_32.cpu | |
48 | KBUILD_CFLAGS += $(cflags-y) | |
49 | ||
50 | # temporary until string.h is fixed | |
51 | KBUILD_CFLAGS += -ffreestanding | |
52 | else | |
53 | BITS := 64 | |
54 | UTS_MACHINE := x86_64 | |
55 | CHECKFLAGS += -D__x86_64__ -m64 | |
56 | ||
57 | KBUILD_AFLAGS += -m64 | |
58 | KBUILD_CFLAGS += -m64 | |
59 | ||
60 | # Use -mpreferred-stack-boundary=3 if supported. | |
61 | KBUILD_CFLAGS += $(call cc-option,-mno-sse -mpreferred-stack-boundary=3) | |
62 | ||
63 | # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) | |
64 | cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) | |
65 | cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) | |
66 | ||
67 | cflags-$(CONFIG_MCORE2) += \ | |
68 | $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) | |
69 | cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \ | |
70 | $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) | |
71 | cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) | |
72 | KBUILD_CFLAGS += $(cflags-y) | |
73 | ||
74 | KBUILD_CFLAGS += -mno-red-zone | |
75 | KBUILD_CFLAGS += -mcmodel=kernel | |
76 | ||
77 | # -funit-at-a-time shrinks the kernel .text considerably | |
78 | # unfortunately it makes reading oopses harder. | |
79 | KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) | |
80 | ||
81 | # this works around some issues with generating unwind tables in older gccs | |
82 | # newer gccs do it by default | |
83 | KBUILD_CFLAGS += -maccumulate-outgoing-args | |
84 | endif | |
85 | ||
86 | ifdef CONFIG_CC_STACKPROTECTOR | |
87 | cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh | |
88 | ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) | |
89 | stackp-y := -fstack-protector | |
90 | KBUILD_CFLAGS += $(stackp-y) | |
91 | else | |
92 | $(warning stack protector enabled but no compiler support) | |
93 | endif | |
94 | endif | |
95 | ||
96 | ifdef CONFIG_X86_X32 | |
97 | x32_ld_ok := $(call try-run,\ | |
98 | /bin/echo -e '1: .quad 1b' | \ | |
99 | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \ | |
100 | $(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \ | |
101 | $(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n) | |
102 | ifeq ($(x32_ld_ok),y) | |
103 | CONFIG_X86_X32_ABI := y | |
104 | KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI | |
105 | KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI | |
106 | else | |
107 | $(warning CONFIG_X86_X32 enabled but no binutils support) | |
108 | endif | |
109 | endif | |
110 | export CONFIG_X86_X32_ABI | |
111 | ||
112 | # Don't unroll struct assignments with kmemcheck enabled | |
113 | ifeq ($(CONFIG_KMEMCHECK),y) | |
114 | KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy) | |
115 | endif | |
116 | ||
117 | # Stackpointer is addressed different for 32 bit and 64 bit x86 | |
118 | sp-$(CONFIG_X86_32) := esp | |
119 | sp-$(CONFIG_X86_64) := rsp | |
120 | ||
121 | # do binutils support CFI? | |
122 | cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1) | |
123 | # is .cfi_signal_frame supported too? | |
124 | cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1) | |
125 | cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1) | |
126 | ||
127 | # does binutils support specific instructions? | |
128 | asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1) | |
129 | avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) | |
130 | avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) | |
131 | ||
132 | KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) | |
133 | KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) | |
134 | ||
135 | LDFLAGS := -m elf_$(UTS_MACHINE) | |
136 | ||
137 | # Speed up the build | |
138 | KBUILD_CFLAGS += -pipe | |
139 | # Workaround for a gcc prelease that unfortunately was shipped in a suse release | |
140 | KBUILD_CFLAGS += -Wno-sign-compare | |
141 | # | |
142 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables | |
143 | # prevent gcc from generating any FP code by mistake | |
144 | KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,) | |
145 | KBUILD_CFLAGS += $(call cc-option,-mno-avx,) | |
146 | ||
147 | KBUILD_CFLAGS += $(mflags-y) | |
148 | KBUILD_AFLAGS += $(mflags-y) | |
149 | ||
150 | archscripts: scripts_basic | |
151 | $(Q)$(MAKE) $(build)=arch/x86/tools relocs | |
152 | ||
153 | ### | |
154 | # Syscall table generation | |
155 | ||
156 | archheaders: | |
157 | $(Q)$(MAKE) $(build)=arch/x86/syscalls all | |
158 | ||
159 | ### | |
160 | # Kernel objects | |
161 | ||
162 | head-y := arch/x86/kernel/head_$(BITS).o | |
163 | head-y += arch/x86/kernel/head$(BITS).o | |
164 | head-y += arch/x86/kernel/head.o | |
165 | ||
166 | libs-y += arch/x86/lib/ | |
167 | ||
168 | # See arch/x86/Kbuild for content of core part of the kernel | |
169 | core-y += arch/x86/ | |
170 | ||
171 | # drivers-y are linked after core-y | |
172 | drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/ | |
173 | drivers-$(CONFIG_PCI) += arch/x86/pci/ | |
174 | ||
175 | # must be linked after kernel/ | |
176 | drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/ | |
177 | ||
178 | # suspend and hibernation support | |
179 | drivers-$(CONFIG_PM) += arch/x86/power/ | |
180 | ||
181 | drivers-$(CONFIG_FB) += arch/x86/video/ | |
182 | ||
183 | #### | |
184 | # boot loader support. Several targets are kept for legacy purposes | |
185 | ||
186 | boot := arch/x86/boot | |
187 | ||
188 | BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage | |
189 | ||
190 | PHONY += bzImage $(BOOT_TARGETS) | |
191 | ||
192 | # Default kernel to build | |
193 | all: bzImage | |
194 | ||
195 | # KBUILD_IMAGE specify target image being built | |
196 | KBUILD_IMAGE := $(boot)/bzImage | |
197 | ||
198 | bzImage: vmlinux | |
199 | ifeq ($(CONFIG_X86_DECODER_SELFTEST),y) | |
200 | $(Q)$(MAKE) $(build)=arch/x86/tools posttest | |
201 | endif | |
202 | $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE) | |
203 | $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot | |
204 | $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@ | |
205 | ||
206 | $(BOOT_TARGETS): vmlinux | |
207 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
208 | ||
209 | PHONY += install | |
210 | install: | |
211 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
212 | ||
213 | PHONY += vdso_install | |
214 | vdso_install: | |
215 | $(Q)$(MAKE) $(build)=arch/x86/vdso $@ | |
216 | ||
217 | archclean: | |
218 | $(Q)rm -rf $(objtree)/arch/i386 | |
219 | $(Q)rm -rf $(objtree)/arch/x86_64 | |
220 | $(Q)$(MAKE) $(clean)=$(boot) | |
221 | $(Q)$(MAKE) $(clean)=arch/x86/tools | |
222 | ||
223 | PHONY += kvmconfig | |
224 | kvmconfig: | |
225 | $(if $(wildcard $(objtree)/.config),, $(error You need an existing .config for this target)) | |
226 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m -O $(objtree) $(objtree)/.config arch/x86/configs/kvm_guest.config | |
227 | $(Q)yes "" | $(MAKE) oldconfig | |
228 | ||
229 | define archhelp | |
230 | echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)' | |
231 | echo ' install - Install kernel using' | |
232 | echo ' (your) ~/bin/$(INSTALLKERNEL) or' | |
233 | echo ' (distribution) /sbin/$(INSTALLKERNEL) or' | |
234 | echo ' install to $$(INSTALL_PATH) and run lilo' | |
235 | echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
236 | echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
237 | echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)' | |
238 | echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)' | |
239 | echo ' bzdisk/fdimage*/isoimage also accept:' | |
240 | echo ' FDARGS="..." arguments for the booted kernel' | |
241 | echo ' FDINITRD=file initrd for the booted kernel' | |
242 | echo ' kvmconfig - Enable additional options for guest kernel support' | |
243 | endef |