Commit | Line | Data |
---|---|---|
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 := $(ARCH)_defconfig | |
12 | endif | |
2266cfd5 | 13 | |
1c678da3 DW |
14 | # How to compile the 16-bit code. Note we always compile for -march=i386; |
15 | # that way we can complain to the user if the CPU is insufficient. | |
de3accda DW |
16 | # |
17 | # The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For | |
a9cfccee PA |
18 | # older versions of GCC, include an *assembly* header to make sure that |
19 | # gcc doesn't play any games behind our back. | |
20 | CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h | |
de3accda DW |
21 | M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS)) |
22 | ||
23 | REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -D__KERNEL__ \ | |
24 | -DDISABLE_BRANCH_PROFILING \ | |
1c678da3 | 25 | -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \ |
1c678da3 DW |
26 | -fno-strict-aliasing -fomit-frame-pointer -fno-pic \ |
27 | -mno-mmx -mno-sse \ | |
28 | $(call cc-option, -ffreestanding) \ | |
1c678da3 DW |
29 | $(call cc-option, -fno-stack-protector) \ |
30 | $(call cc-option, -mpreferred-stack-boundary=2) | |
31 | export REALMODE_CFLAGS | |
32 | ||
0a6ef376 SR |
33 | # BITS is used as extension for files which are available in a 32 bit |
34 | # and a 64 bit version to simplify shared Makefiles. | |
35 | # e.g.: obj-y += foo_$(BITS).o | |
36 | export BITS | |
74b469f2 | 37 | |
a0215061 KC |
38 | ifdef CONFIG_X86_NEED_RELOCS |
39 | LDFLAGS_vmlinux := --emit-relocs | |
40 | endif | |
41 | ||
d746d647 | 42 | ifeq ($(CONFIG_X86_32),y) |
0a6ef376 | 43 | BITS := 32 |
8c6531f7 | 44 | UTS_MACHINE := i386 |
4ba7e5cd | 45 | CHECKFLAGS += -D__i386__ |
0a6ef376 | 46 | |
4ba7e5cd SR |
47 | biarch := $(call cc-option,-m32) |
48 | KBUILD_AFLAGS += $(biarch) | |
49 | KBUILD_CFLAGS += $(biarch) | |
0a6ef376 | 50 | |
0a6ef376 SR |
51 | KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return |
52 | ||
484d90ee AB |
53 | # Never want PIC in a 32-bit kernel, prevent breakage with GCC built |
54 | # with nonstandard options | |
55 | KBUILD_CFLAGS += -fno-pic | |
56 | ||
0a6ef376 SR |
57 | # prevent gcc from keeping the stack 16 byte aligned |
58 | KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2) | |
59 | ||
60 | # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use | |
61 | # a lot more stack due to the lack of sharing of stacklots: | |
c7bd0414 FP |
62 | KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \ |
63 | $(call cc-option,-fno-unit-at-a-time)) | |
0a6ef376 SR |
64 | |
65 | # CPU-specific tuning. Anything which can be shared with UML should go here. | |
66 | include $(srctree)/arch/x86/Makefile_32.cpu | |
67 | KBUILD_CFLAGS += $(cflags-y) | |
68 | ||
69 | # temporary until string.h is fixed | |
70 | KBUILD_CFLAGS += -ffreestanding | |
74b469f2 | 71 | else |
0a6ef376 | 72 | BITS := 64 |
8c6531f7 | 73 | UTS_MACHINE := x86_64 |
0a6ef376 SR |
74 | CHECKFLAGS += -D__x86_64__ -m64 |
75 | ||
14262d67 | 76 | biarch := -m64 |
0a6ef376 SR |
77 | KBUILD_AFLAGS += -m64 |
78 | KBUILD_CFLAGS += -m64 | |
79 | ||
5c630089 | 80 | # Don't autogenerate traditional x87 instructions |
8f2dd677 BW |
81 | KBUILD_CFLAGS += $(call cc-option,-mno-80387) |
82 | KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387) | |
5551a34e | 83 | |
d9b0cde9 | 84 | # Use -mpreferred-stack-boundary=3 if supported. |
5551a34e | 85 | KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3) |
d9b0cde9 | 86 | |
0a6ef376 SR |
87 | # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) |
88 | cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) | |
89 | cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) | |
90 | ||
91 | cflags-$(CONFIG_MCORE2) += \ | |
92 | $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) | |
366d19e1 TD |
93 | cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \ |
94 | $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) | |
0a6ef376 SR |
95 | cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) |
96 | KBUILD_CFLAGS += $(cflags-y) | |
97 | ||
98 | KBUILD_CFLAGS += -mno-red-zone | |
99 | KBUILD_CFLAGS += -mcmodel=kernel | |
100 | ||
0a6ef376 SR |
101 | # -funit-at-a-time shrinks the kernel .text considerably |
102 | # unfortunately it makes reading oopses harder. | |
103 | KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) | |
104 | ||
0a6ef376 SR |
105 | # this works around some issues with generating unwind tables in older gccs |
106 | # newer gccs do it by default | |
fd2d0a19 | 107 | KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args) |
5d707e9c | 108 | endif |
0a6ef376 | 109 | |
19952a92 | 110 | # Make sure compiler does not have buggy stack-protector support. |
5d707e9c TH |
111 | ifdef CONFIG_CC_STACKPROTECTOR |
112 | cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh | |
19952a92 KC |
113 | ifneq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) |
114 | $(warning stack-protector enabled but compiler support broken) | |
5d707e9c | 115 | endif |
0a6ef376 SR |
116 | endif |
117 | ||
0bf62763 PA |
118 | ifdef CONFIG_X86_X32 |
119 | x32_ld_ok := $(call try-run,\ | |
120 | /bin/echo -e '1: .quad 1b' | \ | |
b1e0d8b7 | 121 | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \ |
0bf62763 PA |
122 | $(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \ |
123 | $(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n) | |
8bd69c2d IM |
124 | ifeq ($(x32_ld_ok),y) |
125 | CONFIG_X86_X32_ABI := y | |
126 | KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI | |
127 | KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI | |
128 | else | |
129 | $(warning CONFIG_X86_X32 enabled but no binutils support) | |
130 | endif | |
0bf62763 PA |
131 | endif |
132 | export CONFIG_X86_X32_ABI | |
133 | ||
dfec072e VN |
134 | # Don't unroll struct assignments with kmemcheck enabled |
135 | ifeq ($(CONFIG_KMEMCHECK),y) | |
136 | KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy) | |
137 | endif | |
138 | ||
0a6ef376 SR |
139 | # Stackpointer is addressed different for 32 bit and 64 bit x86 |
140 | sp-$(CONFIG_X86_32) := esp | |
141 | sp-$(CONFIG_X86_64) := rsp | |
142 | ||
143 | # do binutils support CFI? | |
144 | cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1) | |
145 | # is .cfi_signal_frame supported too? | |
146 | cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1) | |
9e565292 | 147 | cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1) |
d7acb92f PA |
148 | |
149 | # does binutils support specific instructions? | |
150 | asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1) | |
06325190 | 151 | asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1) |
ea4d26ae | 152 | avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) |
7056741f | 153 | avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) |
d7acb92f | 154 | |
7056741f JK |
155 | KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) |
156 | KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) | |
0a6ef376 SR |
157 | |
158 | LDFLAGS := -m elf_$(UTS_MACHINE) | |
25dfeeb7 SR |
159 | |
160 | # Speed up the build | |
0a6ef376 | 161 | KBUILD_CFLAGS += -pipe |
25dfeeb7 SR |
162 | # Workaround for a gcc prelease that unfortunately was shipped in a suse release |
163 | KBUILD_CFLAGS += -Wno-sign-compare | |
164 | # | |
165 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables | |
166 | # prevent gcc from generating any FP code by mistake | |
5c630089 | 167 | KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow |
c0e9afc0 | 168 | KBUILD_CFLAGS += $(call cc-option,-mno-avx,) |
0a6ef376 | 169 | |
0a6ef376 SR |
170 | KBUILD_CFLAGS += $(mflags-y) |
171 | KBUILD_AFLAGS += $(mflags-y) | |
172 | ||
3ce9e53e | 173 | archscripts: scripts_basic |
6520fe55 PA |
174 | $(Q)$(MAKE) $(build)=arch/x86/tools relocs |
175 | ||
303395ac PA |
176 | ### |
177 | # Syscall table generation | |
178 | ||
179 | archheaders: | |
180 | $(Q)$(MAKE) $(build)=arch/x86/syscalls all | |
181 | ||
8fc5b4d4 | 182 | archprepare: |
74ca317c | 183 | ifeq ($(CONFIG_KEXEC_FILE),y) |
8fc5b4d4 | 184 | $(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c |
8fc5b4d4 VG |
185 | endif |
186 | ||
0a6ef376 SR |
187 | ### |
188 | # Kernel objects | |
189 | ||
700efc1b EB |
190 | head-y := arch/x86/kernel/head_$(BITS).o |
191 | head-y += arch/x86/kernel/head$(BITS).o | |
0c51a965 | 192 | head-y += arch/x86/kernel/head.o |
0a6ef376 SR |
193 | |
194 | libs-y += arch/x86/lib/ | |
195 | ||
d1f0ae5e SR |
196 | # See arch/x86/Kbuild for content of core part of the kernel |
197 | core-y += arch/x86/ | |
0a6ef376 SR |
198 | |
199 | # drivers-y are linked after core-y | |
200 | drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/ | |
201 | drivers-$(CONFIG_PCI) += arch/x86/pci/ | |
202 | ||
203 | # must be linked after kernel/ | |
204 | drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/ | |
205 | ||
cf7700fe | 206 | # suspend and hibernation support |
0a6ef376 | 207 | drivers-$(CONFIG_PM) += arch/x86/power/ |
cf7700fe | 208 | |
0a6ef376 | 209 | drivers-$(CONFIG_FB) += arch/x86/video/ |
0a6ef376 SR |
210 | |
211 | #### | |
212 | # boot loader support. Several targets are kept for legacy purposes | |
213 | ||
214 | boot := arch/x86/boot | |
215 | ||
1648e4f8 | 216 | BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage |
f9c5107c PA |
217 | |
218 | PHONY += bzImage $(BOOT_TARGETS) | |
0a6ef376 SR |
219 | |
220 | # Default kernel to build | |
221 | all: bzImage | |
222 | ||
223 | # KBUILD_IMAGE specify target image being built | |
f9c5107c | 224 | KBUILD_IMAGE := $(boot)/bzImage |
0a6ef376 | 225 | |
f9c5107c | 226 | bzImage: vmlinux |
ca0e9bad MH |
227 | ifeq ($(CONFIG_X86_DECODER_SELFTEST),y) |
228 | $(Q)$(MAKE) $(build)=arch/x86/tools posttest | |
229 | endif | |
0a6ef376 SR |
230 | $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE) |
231 | $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot | |
41b3eae6 | 232 | $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@ |
0a6ef376 | 233 | |
f9c5107c PA |
234 | $(BOOT_TARGETS): vmlinux |
235 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
0a6ef376 | 236 | |
1648e4f8 PA |
237 | PHONY += install |
238 | install: | |
239 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
240 | ||
0a6ef376 SR |
241 | PHONY += vdso_install |
242 | vdso_install: | |
243 | $(Q)$(MAKE) $(build)=arch/x86/vdso $@ | |
244 | ||
245 | archclean: | |
246 | $(Q)rm -rf $(objtree)/arch/i386 | |
247 | $(Q)rm -rf $(objtree)/arch/x86_64 | |
248 | $(Q)$(MAKE) $(clean)=$(boot) | |
b2d668da | 249 | $(Q)$(MAKE) $(clean)=arch/x86/tools |
b0108f9e | 250 | $(Q)$(MAKE) $(clean)=arch/x86/purgatory |
0a6ef376 SR |
251 | |
252 | define archhelp | |
37f30e21 AK |
253 | echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)' |
254 | echo ' install - Install kernel using' | |
caa27b66 SR |
255 | echo ' (your) ~/bin/$(INSTALLKERNEL) or' |
256 | echo ' (distribution) /sbin/$(INSTALLKERNEL) or' | |
37f30e21 AK |
257 | echo ' install to $$(INSTALL_PATH) and run lilo' |
258 | echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
259 | echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
260 | echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)' | |
261 | echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)' | |
262 | echo ' bzdisk/fdimage*/isoimage also accept:' | |
263 | echo ' FDARGS="..." arguments for the booted kernel' | |
264 | echo ' FDINITRD=file initrd for the booted kernel' | |
0a6ef376 | 265 | endef |