Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
74b469f2 SR |
2 | # Unified Makefile for i386 and x86_64 |
3 | ||
2266cfd5 | 4 | # select defconfig based on actual architecture |
d746d647 | 5 | ifeq ($(ARCH),x86) |
ffee0de4 DW |
6 | ifeq ($(shell uname -m),x86_64) |
7 | KBUILD_DEFCONFIG := x86_64_defconfig | |
8 | else | |
d746d647 | 9 | KBUILD_DEFCONFIG := i386_defconfig |
ffee0de4 | 10 | endif |
d746d647 SR |
11 | else |
12 | KBUILD_DEFCONFIG := $(ARCH)_defconfig | |
13 | endif | |
2266cfd5 | 14 | |
d77698df MK |
15 | # For gcc stack alignment is specified with -mpreferred-stack-boundary, |
16 | # clang has the option -mstack-alignment for that purpose. | |
17 | ifneq ($(call cc-option, -mpreferred-stack-boundary=4),) | |
8f918697 MK |
18 | cc_stack_align4 := -mpreferred-stack-boundary=2 |
19 | cc_stack_align8 := -mpreferred-stack-boundary=3 | |
20 | else ifneq ($(call cc-option, -mstack-alignment=16),) | |
21 | cc_stack_align4 := -mstack-alignment=4 | |
22 | cc_stack_align8 := -mstack-alignment=8 | |
d77698df MK |
23 | endif |
24 | ||
1c678da3 DW |
25 | # How to compile the 16-bit code. Note we always compile for -march=i386; |
26 | # that way we can complain to the user if the CPU is insufficient. | |
de3accda DW |
27 | # |
28 | # The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For | |
a9cfccee PA |
29 | # older versions of GCC, include an *assembly* header to make sure that |
30 | # gcc doesn't play any games behind our back. | |
31 | CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h | |
de3accda DW |
32 | M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS)) |
33 | ||
d6289f36 | 34 | REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -DDISABLE_BRANCH_PROFILING \ |
1c678da3 | 35 | -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \ |
1c678da3 | 36 | -fno-strict-aliasing -fomit-frame-pointer -fno-pic \ |
032a2c4f MK |
37 | -mno-mmx -mno-sse |
38 | ||
39 | REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -ffreestanding) | |
40 | REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -fno-stack-protector) | |
9e8730b1 | 41 | REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), $(cc_stack_align4)) |
1c678da3 DW |
42 | export REALMODE_CFLAGS |
43 | ||
0a6ef376 SR |
44 | # BITS is used as extension for files which are available in a 32 bit |
45 | # and a 64 bit version to simplify shared Makefiles. | |
46 | # e.g.: obj-y += foo_$(BITS).o | |
47 | export BITS | |
74b469f2 | 48 | |
a0215061 KC |
49 | ifdef CONFIG_X86_NEED_RELOCS |
50 | LDFLAGS_vmlinux := --emit-relocs | |
51 | endif | |
52 | ||
b2c51106 AL |
53 | # |
54 | # Prevent GCC from generating any FP code by mistake. | |
55 | # | |
56 | # This must happen before we try the -mpreferred-stack-boundary, see: | |
57 | # | |
58 | # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383 | |
59 | # | |
60 | KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow | |
61 | KBUILD_CFLAGS += $(call cc-option,-mno-avx,) | |
62 | ||
d746d647 | 63 | ifeq ($(CONFIG_X86_32),y) |
0a6ef376 | 64 | BITS := 32 |
8c6531f7 | 65 | UTS_MACHINE := i386 |
4ba7e5cd | 66 | CHECKFLAGS += -D__i386__ |
0a6ef376 | 67 | |
4ba7e5cd SR |
68 | biarch := $(call cc-option,-m32) |
69 | KBUILD_AFLAGS += $(biarch) | |
70 | KBUILD_CFLAGS += $(biarch) | |
0a6ef376 | 71 | |
0a6ef376 SR |
72 | KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return |
73 | ||
484d90ee AB |
74 | # Never want PIC in a 32-bit kernel, prevent breakage with GCC built |
75 | # with nonstandard options | |
76 | KBUILD_CFLAGS += -fno-pic | |
77 | ||
d77698df MK |
78 | # Align the stack to the register width instead of using the default |
79 | # alignment of 16 bytes. This reduces stack usage and the number of | |
80 | # alignment instructions. | |
9e8730b1 | 81 | KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align4)) |
0a6ef376 SR |
82 | |
83 | # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use | |
84 | # a lot more stack due to the lack of sharing of stacklots: | |
c7bd0414 FP |
85 | KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \ |
86 | $(call cc-option,-fno-unit-at-a-time)) | |
0a6ef376 SR |
87 | |
88 | # CPU-specific tuning. Anything which can be shared with UML should go here. | |
a436bb7b | 89 | include arch/x86/Makefile_32.cpu |
0a6ef376 SR |
90 | KBUILD_CFLAGS += $(cflags-y) |
91 | ||
92 | # temporary until string.h is fixed | |
93 | KBUILD_CFLAGS += -ffreestanding | |
74b469f2 | 94 | else |
0a6ef376 | 95 | BITS := 64 |
8c6531f7 | 96 | UTS_MACHINE := x86_64 |
1f2f01b1 | 97 | CHECKFLAGS += -D__x86_64__ |
0a6ef376 | 98 | |
14262d67 | 99 | biarch := -m64 |
0a6ef376 SR |
100 | KBUILD_AFLAGS += -m64 |
101 | KBUILD_CFLAGS += -m64 | |
102 | ||
be6cb027 | 103 | # Align jump targets to 1 byte, not the default 16 bytes: |
2c4fd1ac | 104 | KBUILD_CFLAGS += $(call cc-option,-falign-jumps=1) |
be6cb027 | 105 | |
52648e83 | 106 | # Pack loops tightly as well: |
2c4fd1ac | 107 | KBUILD_CFLAGS += $(call cc-option,-falign-loops=1) |
52648e83 | 108 | |
5c630089 | 109 | # Don't autogenerate traditional x87 instructions |
8f2dd677 BW |
110 | KBUILD_CFLAGS += $(call cc-option,-mno-80387) |
111 | KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387) | |
5551a34e | 112 | |
d77698df MK |
113 | # By default gcc and clang use a stack alignment of 16 bytes for x86. |
114 | # However the standard kernel entry on x86-64 leaves the stack on an | |
115 | # 8-byte boundary. If the compiler isn't informed about the actual | |
116 | # alignment it will generate extra alignment instructions for the | |
117 | # default alignment which keep the stack *mis*aligned. | |
118 | # Furthermore an alignment to the register width reduces stack usage | |
119 | # and the number of alignment instructions. | |
9e8730b1 | 120 | KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align8)) |
d9b0cde9 | 121 | |
d9ee948d L |
122 | # Use -mskip-rax-setup if supported. |
123 | KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup) | |
124 | ||
0a6ef376 SR |
125 | # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) |
126 | cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) | |
127 | cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) | |
128 | ||
129 | cflags-$(CONFIG_MCORE2) += \ | |
130 | $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) | |
366d19e1 TD |
131 | cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \ |
132 | $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) | |
0a6ef376 SR |
133 | cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) |
134 | KBUILD_CFLAGS += $(cflags-y) | |
135 | ||
136 | KBUILD_CFLAGS += -mno-red-zone | |
137 | KBUILD_CFLAGS += -mcmodel=kernel | |
138 | ||
0a6ef376 SR |
139 | # -funit-at-a-time shrinks the kernel .text considerably |
140 | # unfortunately it makes reading oopses harder. | |
141 | KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) | |
5d707e9c | 142 | endif |
0a6ef376 | 143 | |
0bf62763 PA |
144 | ifdef CONFIG_X86_X32 |
145 | x32_ld_ok := $(call try-run,\ | |
146 | /bin/echo -e '1: .quad 1b' | \ | |
b1e0d8b7 | 147 | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \ |
0bf62763 PA |
148 | $(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \ |
149 | $(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n) | |
8bd69c2d IM |
150 | ifeq ($(x32_ld_ok),y) |
151 | CONFIG_X86_X32_ABI := y | |
152 | KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI | |
153 | KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI | |
154 | else | |
155 | $(warning CONFIG_X86_X32 enabled but no binutils support) | |
156 | endif | |
0bf62763 PA |
157 | endif |
158 | export CONFIG_X86_X32_ABI | |
159 | ||
3f135e57 JP |
160 | # |
161 | # If the function graph tracer is used with mcount instead of fentry, | |
162 | # '-maccumulate-outgoing-args' is needed to prevent a GCC bug | |
163 | # (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42109) | |
164 | # | |
165 | ifdef CONFIG_FUNCTION_GRAPH_TRACER | |
166 | ifndef CONFIG_HAVE_FENTRY | |
167 | ACCUMULATE_OUTGOING_ARGS := 1 | |
168 | else | |
169 | ifeq ($(call cc-option-yn, -mfentry), n) | |
170 | ACCUMULATE_OUTGOING_ARGS := 1 | |
a5859c6d JP |
171 | |
172 | # GCC ignores '-maccumulate-outgoing-args' when used with '-Os'. | |
173 | # If '-Os' is enabled, disable it and print a warning. | |
174 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
175 | undefine CONFIG_CC_OPTIMIZE_FOR_SIZE | |
7e609120 | 176 | $(warning Disabling CONFIG_CC_OPTIMIZE_FOR_SIZE. Your compiler does not have -mfentry so you cannot optimize for size with CONFIG_FUNCTION_GRAPH_TRACER.) |
a5859c6d JP |
177 | endif |
178 | ||
3f135e57 JP |
179 | endif |
180 | endif | |
181 | endif | |
182 | ||
e501ce95 PZ |
183 | ifndef CC_HAVE_ASM_GOTO |
184 | $(error Compiler lacks asm-goto support.) | |
185 | endif | |
186 | ||
3f135e57 JP |
187 | # |
188 | # Jump labels need '-maccumulate-outgoing-args' for gcc < 4.5.2 to prevent a | |
189 | # GCC bug (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46226). There's no way | |
190 | # to test for this bug at compile-time because the test case needs to execute, | |
191 | # which is a no-go for cross compilers. So check the GCC version instead. | |
192 | # | |
193 | ifdef CONFIG_JUMP_LABEL | |
194 | ifneq ($(ACCUMULATE_OUTGOING_ARGS), 1) | |
195 | ACCUMULATE_OUTGOING_ARGS = $(call cc-if-fullversion, -lt, 040502, 1) | |
196 | endif | |
197 | endif | |
198 | ||
199 | ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1) | |
4a1bec46 ND |
200 | # This compiler flag is not supported by Clang: |
201 | KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,) | |
3f135e57 JP |
202 | endif |
203 | ||
0a6ef376 SR |
204 | # Stackpointer is addressed different for 32 bit and 64 bit x86 |
205 | sp-$(CONFIG_X86_32) := esp | |
206 | sp-$(CONFIG_X86_64) := rsp | |
207 | ||
7b956f03 AL |
208 | # do binutils support CFI? |
209 | cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1) | |
210 | # is .cfi_signal_frame supported too? | |
211 | cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1) | |
212 | cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1) | |
213 | ||
d7acb92f PA |
214 | # does binutils support specific instructions? |
215 | asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1) | |
75aaf4c3 | 216 | asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1) |
06325190 | 217 | asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1) |
ea4d26ae | 218 | avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) |
7056741f | 219 | avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) |
e0a491c1 | 220 | avx512_instr :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,-DCONFIG_AS_AVX512=1) |
e38b6b7f | 221 | sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI=1) |
222 | sha256_ni_instr :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA256_NI=1) | |
d7acb92f | 223 | |
e0a491c1 GK |
224 | KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) |
225 | KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) | |
0a6ef376 SR |
226 | |
227 | LDFLAGS := -m elf_$(UTS_MACHINE) | |
25dfeeb7 | 228 | |
e3d03598 L |
229 | # |
230 | # The 64-bit kernel must be aligned to 2MB. Pass -z max-page-size=0x200000 to | |
231 | # the linker to force 2MB page size regardless of the default page size used | |
232 | # by the linker. | |
233 | # | |
234 | ifdef CONFIG_X86_64 | |
235 | LDFLAGS += $(call ld-option, -z max-page-size=0x200000) | |
236 | endif | |
237 | ||
25dfeeb7 | 238 | # Speed up the build |
0a6ef376 | 239 | KBUILD_CFLAGS += -pipe |
25dfeeb7 SR |
240 | # Workaround for a gcc prelease that unfortunately was shipped in a suse release |
241 | KBUILD_CFLAGS += -Wno-sign-compare | |
242 | # | |
243 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables | |
0a6ef376 | 244 | |
76b04384 DW |
245 | # Avoid indirect branches in kernel to deal with Spectre |
246 | ifdef CONFIG_RETPOLINE | |
d5028ba8 PZ |
247 | ifneq ($(RETPOLINE_CFLAGS),) |
248 | KBUILD_CFLAGS += $(RETPOLINE_CFLAGS) -DRETPOLINE | |
249 | endif | |
76b04384 DW |
250 | endif |
251 | ||
3ce9e53e | 252 | archscripts: scripts_basic |
6520fe55 PA |
253 | $(Q)$(MAKE) $(build)=arch/x86/tools relocs |
254 | ||
303395ac PA |
255 | ### |
256 | # Syscall table generation | |
257 | ||
258 | archheaders: | |
1f57d5d8 | 259 | $(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all |
303395ac | 260 | |
8fc5b4d4 | 261 | archprepare: |
74ca317c | 262 | ifeq ($(CONFIG_KEXEC_FILE),y) |
8fc5b4d4 | 263 | $(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c |
8fc5b4d4 VG |
264 | endif |
265 | ||
0a6ef376 SR |
266 | ### |
267 | # Kernel objects | |
268 | ||
700efc1b EB |
269 | head-y := arch/x86/kernel/head_$(BITS).o |
270 | head-y += arch/x86/kernel/head$(BITS).o | |
f2d85299 | 271 | head-y += arch/x86/kernel/ebda.o |
8d152e7a | 272 | head-y += arch/x86/kernel/platform-quirks.o |
0a6ef376 SR |
273 | |
274 | libs-y += arch/x86/lib/ | |
275 | ||
d1f0ae5e SR |
276 | # See arch/x86/Kbuild for content of core part of the kernel |
277 | core-y += arch/x86/ | |
0a6ef376 SR |
278 | |
279 | # drivers-y are linked after core-y | |
280 | drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/ | |
281 | drivers-$(CONFIG_PCI) += arch/x86/pci/ | |
282 | ||
283 | # must be linked after kernel/ | |
284 | drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/ | |
285 | ||
cf7700fe | 286 | # suspend and hibernation support |
0a6ef376 | 287 | drivers-$(CONFIG_PM) += arch/x86/power/ |
cf7700fe | 288 | |
0a6ef376 | 289 | drivers-$(CONFIG_FB) += arch/x86/video/ |
0a6ef376 SR |
290 | |
291 | #### | |
292 | # boot loader support. Several targets are kept for legacy purposes | |
293 | ||
294 | boot := arch/x86/boot | |
295 | ||
1648e4f8 | 296 | BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage |
f9c5107c PA |
297 | |
298 | PHONY += bzImage $(BOOT_TARGETS) | |
0a6ef376 SR |
299 | |
300 | # Default kernel to build | |
301 | all: bzImage | |
302 | ||
303 | # KBUILD_IMAGE specify target image being built | |
f9c5107c | 304 | KBUILD_IMAGE := $(boot)/bzImage |
0a6ef376 | 305 | |
f9c5107c | 306 | bzImage: vmlinux |
ca0e9bad MH |
307 | ifeq ($(CONFIG_X86_DECODER_SELFTEST),y) |
308 | $(Q)$(MAKE) $(build)=arch/x86/tools posttest | |
309 | endif | |
0a6ef376 SR |
310 | $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE) |
311 | $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot | |
41b3eae6 | 312 | $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@ |
0a6ef376 | 313 | |
f9c5107c PA |
314 | $(BOOT_TARGETS): vmlinux |
315 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
0a6ef376 | 316 | |
1648e4f8 PA |
317 | PHONY += install |
318 | install: | |
319 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
320 | ||
0a6ef376 SR |
321 | PHONY += vdso_install |
322 | vdso_install: | |
d603c8e1 | 323 | $(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@ |
0a6ef376 SR |
324 | |
325 | archclean: | |
326 | $(Q)rm -rf $(objtree)/arch/i386 | |
327 | $(Q)rm -rf $(objtree)/arch/x86_64 | |
328 | $(Q)$(MAKE) $(clean)=$(boot) | |
b2d668da | 329 | $(Q)$(MAKE) $(clean)=arch/x86/tools |
b0108f9e | 330 | $(Q)$(MAKE) $(clean)=arch/x86/purgatory |
0a6ef376 SR |
331 | |
332 | define archhelp | |
37f30e21 AK |
333 | echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)' |
334 | echo ' install - Install kernel using' | |
caa27b66 SR |
335 | echo ' (your) ~/bin/$(INSTALLKERNEL) or' |
336 | echo ' (distribution) /sbin/$(INSTALLKERNEL) or' | |
37f30e21 AK |
337 | echo ' install to $$(INSTALL_PATH) and run lilo' |
338 | echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
339 | echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
340 | echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)' | |
341 | echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)' | |
342 | echo ' bzdisk/fdimage*/isoimage also accept:' | |
343 | echo ' FDARGS="..." arguments for the booted kernel' | |
344 | echo ' FDINITRD=file initrd for the booted kernel' | |
0a6ef376 | 345 | endef |