]>
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 := $(ARCH)_defconfig | |
12 | endif | |
2266cfd5 | 13 | |
d77698df MK |
14 | # For gcc stack alignment is specified with -mpreferred-stack-boundary, |
15 | # clang has the option -mstack-alignment for that purpose. | |
16 | ifneq ($(call cc-option, -mpreferred-stack-boundary=4),) | |
17 | cc_stack_align_opt := -mpreferred-stack-boundary | |
18 | else ifneq ($(call cc-option, -mstack-alignment=4),) | |
19 | cc_stack_align_opt := -mstack-alignment | |
20 | endif | |
21 | ||
1c678da3 DW |
22 | # How to compile the 16-bit code. Note we always compile for -march=i386; |
23 | # that way we can complain to the user if the CPU is insufficient. | |
de3accda DW |
24 | # |
25 | # The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For | |
a9cfccee PA |
26 | # older versions of GCC, include an *assembly* header to make sure that |
27 | # gcc doesn't play any games behind our back. | |
28 | CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h | |
de3accda DW |
29 | M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS)) |
30 | ||
31 | REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -D__KERNEL__ \ | |
32 | -DDISABLE_BRANCH_PROFILING \ | |
1c678da3 | 33 | -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \ |
1c678da3 | 34 | -fno-strict-aliasing -fomit-frame-pointer -fno-pic \ |
032a2c4f MK |
35 | -mno-mmx -mno-sse |
36 | ||
37 | REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -ffreestanding) | |
38 | REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -fno-stack-protector) | |
d77698df | 39 | REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), $(cc_stack_align_opt)=2) |
1c678da3 DW |
40 | export REALMODE_CFLAGS |
41 | ||
0a6ef376 SR |
42 | # BITS is used as extension for files which are available in a 32 bit |
43 | # and a 64 bit version to simplify shared Makefiles. | |
44 | # e.g.: obj-y += foo_$(BITS).o | |
45 | export BITS | |
74b469f2 | 46 | |
a0215061 KC |
47 | ifdef CONFIG_X86_NEED_RELOCS |
48 | LDFLAGS_vmlinux := --emit-relocs | |
49 | endif | |
50 | ||
b2c51106 AL |
51 | # |
52 | # Prevent GCC from generating any FP code by mistake. | |
53 | # | |
54 | # This must happen before we try the -mpreferred-stack-boundary, see: | |
55 | # | |
56 | # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383 | |
57 | # | |
58 | KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow | |
59 | KBUILD_CFLAGS += $(call cc-option,-mno-avx,) | |
60 | ||
d746d647 | 61 | ifeq ($(CONFIG_X86_32),y) |
0a6ef376 | 62 | BITS := 32 |
8c6531f7 | 63 | UTS_MACHINE := i386 |
4ba7e5cd | 64 | CHECKFLAGS += -D__i386__ |
0a6ef376 | 65 | |
4ba7e5cd SR |
66 | biarch := $(call cc-option,-m32) |
67 | KBUILD_AFLAGS += $(biarch) | |
68 | KBUILD_CFLAGS += $(biarch) | |
0a6ef376 | 69 | |
0a6ef376 SR |
70 | KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return |
71 | ||
484d90ee AB |
72 | # Never want PIC in a 32-bit kernel, prevent breakage with GCC built |
73 | # with nonstandard options | |
74 | KBUILD_CFLAGS += -fno-pic | |
75 | ||
d77698df MK |
76 | # Align the stack to the register width instead of using the default |
77 | # alignment of 16 bytes. This reduces stack usage and the number of | |
78 | # alignment instructions. | |
79 | KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align_opt)=2) | |
0a6ef376 SR |
80 | |
81 | # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use | |
82 | # a lot more stack due to the lack of sharing of stacklots: | |
c7bd0414 FP |
83 | KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \ |
84 | $(call cc-option,-fno-unit-at-a-time)) | |
0a6ef376 SR |
85 | |
86 | # CPU-specific tuning. Anything which can be shared with UML should go here. | |
a436bb7b | 87 | include arch/x86/Makefile_32.cpu |
0a6ef376 SR |
88 | KBUILD_CFLAGS += $(cflags-y) |
89 | ||
90 | # temporary until string.h is fixed | |
91 | KBUILD_CFLAGS += -ffreestanding | |
74b469f2 | 92 | else |
0a6ef376 | 93 | BITS := 64 |
8c6531f7 | 94 | UTS_MACHINE := x86_64 |
0a6ef376 SR |
95 | CHECKFLAGS += -D__x86_64__ -m64 |
96 | ||
14262d67 | 97 | biarch := -m64 |
0a6ef376 SR |
98 | KBUILD_AFLAGS += -m64 |
99 | KBUILD_CFLAGS += -m64 | |
100 | ||
be6cb027 | 101 | # Align jump targets to 1 byte, not the default 16 bytes: |
2c4fd1ac | 102 | KBUILD_CFLAGS += $(call cc-option,-falign-jumps=1) |
be6cb027 | 103 | |
52648e83 | 104 | # Pack loops tightly as well: |
2c4fd1ac | 105 | KBUILD_CFLAGS += $(call cc-option,-falign-loops=1) |
52648e83 | 106 | |
5c630089 | 107 | # Don't autogenerate traditional x87 instructions |
8f2dd677 BW |
108 | KBUILD_CFLAGS += $(call cc-option,-mno-80387) |
109 | KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387) | |
5551a34e | 110 | |
d77698df MK |
111 | # By default gcc and clang use a stack alignment of 16 bytes for x86. |
112 | # However the standard kernel entry on x86-64 leaves the stack on an | |
113 | # 8-byte boundary. If the compiler isn't informed about the actual | |
114 | # alignment it will generate extra alignment instructions for the | |
115 | # default alignment which keep the stack *mis*aligned. | |
116 | # Furthermore an alignment to the register width reduces stack usage | |
117 | # and the number of alignment instructions. | |
118 | KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align_opt)=3) | |
d9b0cde9 | 119 | |
d9ee948d L |
120 | # Use -mskip-rax-setup if supported. |
121 | KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup) | |
122 | ||
0a6ef376 SR |
123 | # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) |
124 | cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) | |
125 | cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) | |
126 | ||
127 | cflags-$(CONFIG_MCORE2) += \ | |
128 | $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) | |
366d19e1 TD |
129 | cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \ |
130 | $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) | |
0a6ef376 SR |
131 | cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) |
132 | KBUILD_CFLAGS += $(cflags-y) | |
133 | ||
134 | KBUILD_CFLAGS += -mno-red-zone | |
135 | KBUILD_CFLAGS += -mcmodel=kernel | |
136 | ||
0a6ef376 SR |
137 | # -funit-at-a-time shrinks the kernel .text considerably |
138 | # unfortunately it makes reading oopses harder. | |
139 | KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) | |
5d707e9c | 140 | endif |
0a6ef376 | 141 | |
0bf62763 PA |
142 | ifdef CONFIG_X86_X32 |
143 | x32_ld_ok := $(call try-run,\ | |
144 | /bin/echo -e '1: .quad 1b' | \ | |
b1e0d8b7 | 145 | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \ |
0bf62763 PA |
146 | $(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \ |
147 | $(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n) | |
8bd69c2d IM |
148 | ifeq ($(x32_ld_ok),y) |
149 | CONFIG_X86_X32_ABI := y | |
150 | KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI | |
151 | KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI | |
152 | else | |
153 | $(warning CONFIG_X86_X32 enabled but no binutils support) | |
154 | endif | |
0bf62763 PA |
155 | endif |
156 | export CONFIG_X86_X32_ABI | |
157 | ||
dfec072e VN |
158 | # Don't unroll struct assignments with kmemcheck enabled |
159 | ifeq ($(CONFIG_KMEMCHECK),y) | |
160 | KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy) | |
161 | endif | |
162 | ||
3f135e57 JP |
163 | # |
164 | # If the function graph tracer is used with mcount instead of fentry, | |
165 | # '-maccumulate-outgoing-args' is needed to prevent a GCC bug | |
166 | # (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42109) | |
167 | # | |
168 | ifdef CONFIG_FUNCTION_GRAPH_TRACER | |
169 | ifndef CONFIG_HAVE_FENTRY | |
170 | ACCUMULATE_OUTGOING_ARGS := 1 | |
171 | else | |
172 | ifeq ($(call cc-option-yn, -mfentry), n) | |
173 | ACCUMULATE_OUTGOING_ARGS := 1 | |
a5859c6d JP |
174 | |
175 | # GCC ignores '-maccumulate-outgoing-args' when used with '-Os'. | |
176 | # If '-Os' is enabled, disable it and print a warning. | |
177 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
178 | undefine CONFIG_CC_OPTIMIZE_FOR_SIZE | |
7e609120 | 179 | $(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 |
180 | endif |
181 | ||
3f135e57 JP |
182 | endif |
183 | endif | |
184 | endif | |
185 | ||
186 | # | |
187 | # Jump labels need '-maccumulate-outgoing-args' for gcc < 4.5.2 to prevent a | |
188 | # GCC bug (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46226). There's no way | |
189 | # to test for this bug at compile-time because the test case needs to execute, | |
190 | # which is a no-go for cross compilers. So check the GCC version instead. | |
191 | # | |
192 | ifdef CONFIG_JUMP_LABEL | |
193 | ifneq ($(ACCUMULATE_OUTGOING_ARGS), 1) | |
194 | ACCUMULATE_OUTGOING_ARGS = $(call cc-if-fullversion, -lt, 040502, 1) | |
195 | endif | |
196 | endif | |
197 | ||
198 | ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1) | |
4a1bec46 ND |
199 | # This compiler flag is not supported by Clang: |
200 | KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,) | |
3f135e57 JP |
201 | endif |
202 | ||
0a6ef376 SR |
203 | # Stackpointer is addressed different for 32 bit and 64 bit x86 |
204 | sp-$(CONFIG_X86_32) := esp | |
205 | sp-$(CONFIG_X86_64) := rsp | |
206 | ||
7b956f03 AL |
207 | # do binutils support CFI? |
208 | cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1) | |
209 | # is .cfi_signal_frame supported too? | |
210 | cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1) | |
211 | cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1) | |
212 | ||
d7acb92f PA |
213 | # does binutils support specific instructions? |
214 | asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1) | |
75aaf4c3 | 215 | asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1) |
06325190 | 216 | asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1) |
ea4d26ae | 217 | avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) |
7056741f | 218 | avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) |
e0a491c1 | 219 | avx512_instr :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,-DCONFIG_AS_AVX512=1) |
e38b6b7f | 220 | sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI=1) |
221 | sha256_ni_instr :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA256_NI=1) | |
d7acb92f | 222 | |
e0a491c1 GK |
223 | KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) |
224 | KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) | |
0a6ef376 SR |
225 | |
226 | LDFLAGS := -m elf_$(UTS_MACHINE) | |
25dfeeb7 SR |
227 | |
228 | # Speed up the build | |
0a6ef376 | 229 | KBUILD_CFLAGS += -pipe |
25dfeeb7 SR |
230 | # Workaround for a gcc prelease that unfortunately was shipped in a suse release |
231 | KBUILD_CFLAGS += -Wno-sign-compare | |
232 | # | |
233 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables | |
0a6ef376 | 234 | |
0a6ef376 SR |
235 | KBUILD_CFLAGS += $(mflags-y) |
236 | KBUILD_AFLAGS += $(mflags-y) | |
237 | ||
3ce9e53e | 238 | archscripts: scripts_basic |
6520fe55 PA |
239 | $(Q)$(MAKE) $(build)=arch/x86/tools relocs |
240 | ||
303395ac PA |
241 | ### |
242 | # Syscall table generation | |
243 | ||
244 | archheaders: | |
1f57d5d8 | 245 | $(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all |
303395ac | 246 | |
8fc5b4d4 | 247 | archprepare: |
74ca317c | 248 | ifeq ($(CONFIG_KEXEC_FILE),y) |
8fc5b4d4 | 249 | $(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c |
8fc5b4d4 VG |
250 | endif |
251 | ||
0a6ef376 SR |
252 | ### |
253 | # Kernel objects | |
254 | ||
700efc1b EB |
255 | head-y := arch/x86/kernel/head_$(BITS).o |
256 | head-y += arch/x86/kernel/head$(BITS).o | |
f2d85299 | 257 | head-y += arch/x86/kernel/ebda.o |
8d152e7a | 258 | head-y += arch/x86/kernel/platform-quirks.o |
0a6ef376 SR |
259 | |
260 | libs-y += arch/x86/lib/ | |
261 | ||
d1f0ae5e SR |
262 | # See arch/x86/Kbuild for content of core part of the kernel |
263 | core-y += arch/x86/ | |
0a6ef376 SR |
264 | |
265 | # drivers-y are linked after core-y | |
266 | drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/ | |
267 | drivers-$(CONFIG_PCI) += arch/x86/pci/ | |
268 | ||
269 | # must be linked after kernel/ | |
270 | drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/ | |
271 | ||
cf7700fe | 272 | # suspend and hibernation support |
0a6ef376 | 273 | drivers-$(CONFIG_PM) += arch/x86/power/ |
cf7700fe | 274 | |
0a6ef376 | 275 | drivers-$(CONFIG_FB) += arch/x86/video/ |
0a6ef376 SR |
276 | |
277 | #### | |
278 | # boot loader support. Several targets are kept for legacy purposes | |
279 | ||
280 | boot := arch/x86/boot | |
281 | ||
1648e4f8 | 282 | BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage |
f9c5107c PA |
283 | |
284 | PHONY += bzImage $(BOOT_TARGETS) | |
0a6ef376 SR |
285 | |
286 | # Default kernel to build | |
287 | all: bzImage | |
288 | ||
289 | # KBUILD_IMAGE specify target image being built | |
f9c5107c | 290 | KBUILD_IMAGE := $(boot)/bzImage |
0a6ef376 | 291 | |
f9c5107c | 292 | bzImage: vmlinux |
ca0e9bad MH |
293 | ifeq ($(CONFIG_X86_DECODER_SELFTEST),y) |
294 | $(Q)$(MAKE) $(build)=arch/x86/tools posttest | |
295 | endif | |
0a6ef376 SR |
296 | $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE) |
297 | $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot | |
41b3eae6 | 298 | $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@ |
0a6ef376 | 299 | |
f9c5107c PA |
300 | $(BOOT_TARGETS): vmlinux |
301 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
0a6ef376 | 302 | |
1648e4f8 PA |
303 | PHONY += install |
304 | install: | |
305 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
306 | ||
0a6ef376 SR |
307 | PHONY += vdso_install |
308 | vdso_install: | |
d603c8e1 | 309 | $(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@ |
0a6ef376 SR |
310 | |
311 | archclean: | |
312 | $(Q)rm -rf $(objtree)/arch/i386 | |
313 | $(Q)rm -rf $(objtree)/arch/x86_64 | |
314 | $(Q)$(MAKE) $(clean)=$(boot) | |
b2d668da | 315 | $(Q)$(MAKE) $(clean)=arch/x86/tools |
b0108f9e | 316 | $(Q)$(MAKE) $(clean)=arch/x86/purgatory |
0a6ef376 SR |
317 | |
318 | define archhelp | |
37f30e21 AK |
319 | echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)' |
320 | echo ' install - Install kernel using' | |
caa27b66 SR |
321 | echo ' (your) ~/bin/$(INSTALLKERNEL) or' |
322 | echo ' (distribution) /sbin/$(INSTALLKERNEL) or' | |
37f30e21 AK |
323 | echo ' install to $$(INSTALL_PATH) and run lilo' |
324 | echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
325 | echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
326 | echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)' | |
327 | echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)' | |
328 | echo ' bzdisk/fdimage*/isoimage also accept:' | |
329 | echo ' FDARGS="..." arguments for the booted kernel' | |
330 | echo ' FDINITRD=file initrd for the booted kernel' | |
0a6ef376 | 331 | endef |