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Commit | Line | Data |
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74b469f2 SR |
1 | # Unified Makefile for i386 and x86_64 |
2 | ||
2266cfd5 | 3 | # select defconfig based on actual architecture |
d746d647 | 4 | ifeq ($(ARCH),x86) |
ffee0de4 DW |
5 | ifeq ($(shell uname -m),x86_64) |
6 | KBUILD_DEFCONFIG := x86_64_defconfig | |
7 | else | |
d746d647 | 8 | KBUILD_DEFCONFIG := i386_defconfig |
ffee0de4 | 9 | endif |
d746d647 SR |
10 | else |
11 | KBUILD_DEFCONFIG := $(ARCH)_defconfig | |
12 | endif | |
2266cfd5 | 13 | |
1c678da3 DW |
14 | # How to compile the 16-bit code. Note we always compile for -march=i386; |
15 | # that way we can complain to the user if the CPU is insufficient. | |
de3accda DW |
16 | # |
17 | # The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For | |
18 | # older versions of GCC, we need to play evil and unreliable tricks to | |
19 | # attempt to ensure that our asm(".code16gcc") is first in the asm | |
20 | # output. | |
21 | CODE16GCC_CFLAGS := -m32 -include $(srctree)/arch/x86/boot/code16gcc.h \ | |
22 | $(call cc-option, -fno-toplevel-reorder,\ | |
23 | $(call cc-option, -fno-unit-at-a-time)) | |
24 | M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS)) | |
25 | ||
26 | REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -D__KERNEL__ \ | |
27 | -DDISABLE_BRANCH_PROFILING \ | |
1c678da3 | 28 | -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \ |
1c678da3 DW |
29 | -fno-strict-aliasing -fomit-frame-pointer -fno-pic \ |
30 | -mno-mmx -mno-sse \ | |
31 | $(call cc-option, -ffreestanding) \ | |
1c678da3 DW |
32 | $(call cc-option, -fno-stack-protector) \ |
33 | $(call cc-option, -mpreferred-stack-boundary=2) | |
34 | export REALMODE_CFLAGS | |
35 | ||
0a6ef376 SR |
36 | # BITS is used as extension for files which are available in a 32 bit |
37 | # and a 64 bit version to simplify shared Makefiles. | |
38 | # e.g.: obj-y += foo_$(BITS).o | |
39 | export BITS | |
74b469f2 | 40 | |
a0215061 KC |
41 | ifdef CONFIG_X86_NEED_RELOCS |
42 | LDFLAGS_vmlinux := --emit-relocs | |
43 | endif | |
44 | ||
d746d647 | 45 | ifeq ($(CONFIG_X86_32),y) |
0a6ef376 | 46 | BITS := 32 |
8c6531f7 | 47 | UTS_MACHINE := i386 |
4ba7e5cd | 48 | CHECKFLAGS += -D__i386__ |
0a6ef376 | 49 | |
4ba7e5cd SR |
50 | biarch := $(call cc-option,-m32) |
51 | KBUILD_AFLAGS += $(biarch) | |
52 | KBUILD_CFLAGS += $(biarch) | |
0a6ef376 | 53 | |
0a6ef376 SR |
54 | KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return |
55 | ||
8b3b005d PA |
56 | # Don't autogenerate MMX or SSE instructions |
57 | KBUILD_CFLAGS += -mno-mmx -mno-sse | |
5551a34e | 58 | |
484d90ee AB |
59 | # Never want PIC in a 32-bit kernel, prevent breakage with GCC built |
60 | # with nonstandard options | |
61 | KBUILD_CFLAGS += -fno-pic | |
62 | ||
0a6ef376 SR |
63 | # prevent gcc from keeping the stack 16 byte aligned |
64 | KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2) | |
65 | ||
66 | # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use | |
67 | # a lot more stack due to the lack of sharing of stacklots: | |
c7bd0414 FP |
68 | KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \ |
69 | $(call cc-option,-fno-unit-at-a-time)) | |
0a6ef376 SR |
70 | |
71 | # CPU-specific tuning. Anything which can be shared with UML should go here. | |
72 | include $(srctree)/arch/x86/Makefile_32.cpu | |
73 | KBUILD_CFLAGS += $(cflags-y) | |
74 | ||
75 | # temporary until string.h is fixed | |
76 | KBUILD_CFLAGS += -ffreestanding | |
74b469f2 | 77 | else |
0a6ef376 | 78 | BITS := 64 |
8c6531f7 | 79 | UTS_MACHINE := x86_64 |
0a6ef376 SR |
80 | CHECKFLAGS += -D__x86_64__ -m64 |
81 | ||
82 | KBUILD_AFLAGS += -m64 | |
83 | KBUILD_CFLAGS += -m64 | |
84 | ||
8b3b005d PA |
85 | # Don't autogenerate MMX or SSE instructions |
86 | KBUILD_CFLAGS += -mno-mmx -mno-sse | |
5551a34e | 87 | |
d9b0cde9 | 88 | # Use -mpreferred-stack-boundary=3 if supported. |
5551a34e | 89 | KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3) |
d9b0cde9 | 90 | |
0a6ef376 SR |
91 | # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) |
92 | cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) | |
93 | cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) | |
94 | ||
95 | cflags-$(CONFIG_MCORE2) += \ | |
96 | $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) | |
366d19e1 TD |
97 | cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \ |
98 | $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) | |
0a6ef376 SR |
99 | cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) |
100 | KBUILD_CFLAGS += $(cflags-y) | |
101 | ||
102 | KBUILD_CFLAGS += -mno-red-zone | |
103 | KBUILD_CFLAGS += -mcmodel=kernel | |
104 | ||
0a6ef376 SR |
105 | # -funit-at-a-time shrinks the kernel .text considerably |
106 | # unfortunately it makes reading oopses harder. | |
107 | KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) | |
108 | ||
0a6ef376 SR |
109 | # this works around some issues with generating unwind tables in older gccs |
110 | # newer gccs do it by default | |
111 | KBUILD_CFLAGS += -maccumulate-outgoing-args | |
5d707e9c | 112 | endif |
0a6ef376 | 113 | |
19952a92 | 114 | # Make sure compiler does not have buggy stack-protector support. |
5d707e9c TH |
115 | ifdef CONFIG_CC_STACKPROTECTOR |
116 | cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh | |
19952a92 KC |
117 | ifneq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) |
118 | $(warning stack-protector enabled but compiler support broken) | |
5d707e9c | 119 | endif |
0a6ef376 SR |
120 | endif |
121 | ||
0bf62763 PA |
122 | ifdef CONFIG_X86_X32 |
123 | x32_ld_ok := $(call try-run,\ | |
124 | /bin/echo -e '1: .quad 1b' | \ | |
b1e0d8b7 | 125 | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \ |
0bf62763 PA |
126 | $(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \ |
127 | $(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n) | |
8bd69c2d IM |
128 | ifeq ($(x32_ld_ok),y) |
129 | CONFIG_X86_X32_ABI := y | |
130 | KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI | |
131 | KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI | |
132 | else | |
133 | $(warning CONFIG_X86_X32 enabled but no binutils support) | |
134 | endif | |
0bf62763 PA |
135 | endif |
136 | export CONFIG_X86_X32_ABI | |
137 | ||
dfec072e VN |
138 | # Don't unroll struct assignments with kmemcheck enabled |
139 | ifeq ($(CONFIG_KMEMCHECK),y) | |
140 | KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy) | |
141 | endif | |
142 | ||
0a6ef376 SR |
143 | # Stackpointer is addressed different for 32 bit and 64 bit x86 |
144 | sp-$(CONFIG_X86_32) := esp | |
145 | sp-$(CONFIG_X86_64) := rsp | |
146 | ||
147 | # do binutils support CFI? | |
148 | cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1) | |
149 | # is .cfi_signal_frame supported too? | |
150 | cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1) | |
9e565292 | 151 | cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1) |
d7acb92f PA |
152 | |
153 | # does binutils support specific instructions? | |
154 | asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1) | |
ea4d26ae | 155 | avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) |
7056741f | 156 | avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) |
d7acb92f | 157 | |
7056741f JK |
158 | KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) |
159 | KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) | |
0a6ef376 SR |
160 | |
161 | LDFLAGS := -m elf_$(UTS_MACHINE) | |
25dfeeb7 SR |
162 | |
163 | # Speed up the build | |
0a6ef376 | 164 | KBUILD_CFLAGS += -pipe |
25dfeeb7 SR |
165 | # Workaround for a gcc prelease that unfortunately was shipped in a suse release |
166 | KBUILD_CFLAGS += -Wno-sign-compare | |
167 | # | |
168 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables | |
169 | # prevent gcc from generating any FP code by mistake | |
170 | KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,) | |
c0e9afc0 | 171 | KBUILD_CFLAGS += $(call cc-option,-mno-avx,) |
0a6ef376 | 172 | |
0a6ef376 SR |
173 | KBUILD_CFLAGS += $(mflags-y) |
174 | KBUILD_AFLAGS += $(mflags-y) | |
175 | ||
3ce9e53e | 176 | archscripts: scripts_basic |
6520fe55 PA |
177 | $(Q)$(MAKE) $(build)=arch/x86/tools relocs |
178 | ||
303395ac PA |
179 | ### |
180 | # Syscall table generation | |
181 | ||
182 | archheaders: | |
183 | $(Q)$(MAKE) $(build)=arch/x86/syscalls all | |
184 | ||
0a6ef376 SR |
185 | ### |
186 | # Kernel objects | |
187 | ||
700efc1b EB |
188 | head-y := arch/x86/kernel/head_$(BITS).o |
189 | head-y += arch/x86/kernel/head$(BITS).o | |
0c51a965 | 190 | head-y += arch/x86/kernel/head.o |
0a6ef376 SR |
191 | |
192 | libs-y += arch/x86/lib/ | |
193 | ||
d1f0ae5e SR |
194 | # See arch/x86/Kbuild for content of core part of the kernel |
195 | core-y += arch/x86/ | |
0a6ef376 SR |
196 | |
197 | # drivers-y are linked after core-y | |
198 | drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/ | |
199 | drivers-$(CONFIG_PCI) += arch/x86/pci/ | |
200 | ||
201 | # must be linked after kernel/ | |
202 | drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/ | |
203 | ||
cf7700fe | 204 | # suspend and hibernation support |
0a6ef376 | 205 | drivers-$(CONFIG_PM) += arch/x86/power/ |
cf7700fe | 206 | |
0a6ef376 | 207 | drivers-$(CONFIG_FB) += arch/x86/video/ |
0a6ef376 SR |
208 | |
209 | #### | |
210 | # boot loader support. Several targets are kept for legacy purposes | |
211 | ||
212 | boot := arch/x86/boot | |
213 | ||
1648e4f8 | 214 | BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage |
f9c5107c PA |
215 | |
216 | PHONY += bzImage $(BOOT_TARGETS) | |
0a6ef376 SR |
217 | |
218 | # Default kernel to build | |
219 | all: bzImage | |
220 | ||
221 | # KBUILD_IMAGE specify target image being built | |
f9c5107c | 222 | KBUILD_IMAGE := $(boot)/bzImage |
0a6ef376 | 223 | |
f9c5107c | 224 | bzImage: vmlinux |
ca0e9bad MH |
225 | ifeq ($(CONFIG_X86_DECODER_SELFTEST),y) |
226 | $(Q)$(MAKE) $(build)=arch/x86/tools posttest | |
227 | endif | |
0a6ef376 SR |
228 | $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE) |
229 | $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot | |
41b3eae6 | 230 | $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@ |
0a6ef376 | 231 | |
f9c5107c PA |
232 | $(BOOT_TARGETS): vmlinux |
233 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
0a6ef376 | 234 | |
1648e4f8 PA |
235 | PHONY += install |
236 | install: | |
237 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
238 | ||
0a6ef376 SR |
239 | PHONY += vdso_install |
240 | vdso_install: | |
241 | $(Q)$(MAKE) $(build)=arch/x86/vdso $@ | |
242 | ||
243 | archclean: | |
244 | $(Q)rm -rf $(objtree)/arch/i386 | |
245 | $(Q)rm -rf $(objtree)/arch/x86_64 | |
246 | $(Q)$(MAKE) $(clean)=$(boot) | |
b2d668da | 247 | $(Q)$(MAKE) $(clean)=arch/x86/tools |
0a6ef376 | 248 | |
fc58be75 | 249 | PHONY += kvmconfig |
46ff5387 BP |
250 | kvmconfig: |
251 | $(if $(wildcard $(objtree)/.config),, $(error You need an existing .config for this target)) | |
252 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m -O $(objtree) $(objtree)/.config arch/x86/configs/kvm_guest.config | |
253 | $(Q)yes "" | $(MAKE) oldconfig | |
254 | ||
0a6ef376 | 255 | define archhelp |
37f30e21 AK |
256 | echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)' |
257 | echo ' install - Install kernel using' | |
caa27b66 SR |
258 | echo ' (your) ~/bin/$(INSTALLKERNEL) or' |
259 | echo ' (distribution) /sbin/$(INSTALLKERNEL) or' | |
37f30e21 AK |
260 | echo ' install to $$(INSTALL_PATH) and run lilo' |
261 | echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
262 | echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
263 | echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)' | |
264 | echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)' | |
265 | echo ' bzdisk/fdimage*/isoimage also accept:' | |
266 | echo ' FDARGS="..." arguments for the booted kernel' | |
267 | echo ' FDINITRD=file initrd for the booted kernel' | |
46ff5387 | 268 | echo ' kvmconfig - Enable additional options for guest kernel support' |
0a6ef376 | 269 | endef |