1 # SPDX-License-Identifier: GPL-2.0 <<
2 # Unified Makefile for i386 and x86_64 <<
3 <<
4 # select defconfig based on actual architectur <<
5 ifeq ($(ARCH),x86) <<
6 ifeq ($(shell uname -m | sed -e 's/i.86/i386 <<
7 KBUILD_DEFCONFIG := i386_defconfig <<
8 else <<
9 KBUILD_DEFCONFIG := x86_64_defconfig <<
10 endif <<
11 else <<
12 KBUILD_DEFCONFIG := $(ARCH)_defconfig <<
13 endif <<
14 <<
15 ifdef CONFIG_CC_IS_GCC <<
16 RETPOLINE_CFLAGS := $(call cc-option,-m <<
17 RETPOLINE_VDSO_CFLAGS := $(call cc-option,-m <<
18 endif <<
19 ifdef CONFIG_CC_IS_CLANG <<
20 RETPOLINE_CFLAGS := -mretpoline-externa <<
21 RETPOLINE_VDSO_CFLAGS := -mretpoline <<
22 endif <<
23 RETPOLINE_CFLAGS += $(call cc-option,-m <<
24 <<
25 ifdef CONFIG_MITIGATION_RETHUNK <<
26 RETHUNK_CFLAGS := -mfunction-return=t <<
27 RETHUNK_RUSTFLAGS := -Zfunction-return=t <<
28 RETPOLINE_CFLAGS += $(RETHUNK_CFLAGS) <<
29 RETPOLINE_RUSTFLAGS += $(RETHUNK_RUSTFLAGS <<
30 endif <<
31 <<
32 export RETHUNK_CFLAGS <<
33 export RETHUNK_RUSTFLAGS <<
34 export RETPOLINE_CFLAGS <<
35 export RETPOLINE_RUSTFLAGS <<
36 export RETPOLINE_VDSO_CFLAGS <<
37 <<
38 # For gcc stack alignment is specified with -m <<
39 # clang has the option -mstack-alignment for t <<
40 ifneq ($(call cc-option, -mpreferred-stack-bou <<
41 cc_stack_align4 := -mpreferred-stack-bou <<
42 cc_stack_align8 := -mpreferred-stack-bou <<
43 else ifneq ($(call cc-option, -mstack-alignmen <<
44 cc_stack_align4 := -mstack-alignment=4 <<
45 cc_stack_align8 := -mstack-alignment=8 <<
46 endif <<
47 <<
48 # How to compile the 16-bit code. Note we alw <<
49 # that way we can complain to the user if the <<
50 REALMODE_CFLAGS := -std=gnu11 -m16 -g -Os -DDI <<
51 -Wall -Wstrict-prototypes - <<
52 -fno-strict-aliasing -fomit <<
53 -mno-mmx -mno-sse $(call cc <<
54 <<
55 REALMODE_CFLAGS += -ffreestanding <<
56 REALMODE_CFLAGS += -fno-stack-protector <<
57 REALMODE_CFLAGS += -Wno-address-of-packed-memb <<
58 REALMODE_CFLAGS += $(cc_stack_align4) <<
59 REALMODE_CFLAGS += $(CLANG_FLAGS) <<
60 ifdef CONFIG_CC_IS_CLANG <<
61 REALMODE_CFLAGS += -Wno-gnu <<
62 endif <<
63 export REALMODE_CFLAGS <<
64 <<
65 # BITS is used as extension for files which ar <<
66 # and a 64 bit version to simplify shared Make <<
67 # e.g.: obj-y += foo_$(BITS).o <<
68 export BITS <<
69 <<
70 # <<
71 # Prevent GCC from generating any FP code by m <<
72 # 1 #
73 # This must happen before we try the -mpreferr !! 2 # m68k/Makefile
74 # 3 #
75 # https://gcc.gnu.org/bugzilla/show_bug.cgi !! 4 # This file is included by the global makefile so that you can add your own
76 # !! 5 # architecture-specific flags and dependencies. Remember to do have actions
77 KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 - !! 6 # for "archclean" and "archdep" for cleaning up and making dependencies for
78 KBUILD_RUSTFLAGS += --target=$(objtree)/script !! 7 # this architecture
79 KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse !! 8 #
80 !! 9 # This file is subject to the terms and conditions of the GNU General Public
81 # !! 10 # License. See the file "COPYING" in the main directory of this archive
82 # CFLAGS for compiling floating point code ins !! 11 # for more details.
83 # !! 12 #
84 CC_FLAGS_FPU := -msse -msse2 !! 13 # Copyright (C) 1994 by Hamish Macdonald
85 ifdef CONFIG_CC_IS_GCC !! 14 # Copyright (C) 2002,2011 Greg Ungerer <gerg@snapgear.com>
86 # Stack alignment mismatch, proceed with cauti !! 15 #
87 # GCC < 7.1 cannot compile code using `double` !! 16
88 # (8B stack alignment). !! 17 KBUILD_DEFCONFIG := multi_defconfig
89 # See https://gcc.gnu.org/bugzilla/show_bug.cg !! 18
90 # !! 19 ifdef cross_compiling
91 # The "-msse" in the first argument is there s !! 20 ifeq ($(CROSS_COMPILE),)
92 # -mpreferred-stack-boundary=3 build error: !! 21 CROSS_COMPILE := $(call cc-cross-prefix, \
93 # !! 22 m68k-linux-gnu- m68k-linux- m68k-unknown-linux-gnu-)
94 # -mpreferred-stack-boundary=3 is not between !! 23 endif
95 # !! 24 endif
96 # can be triggered. Otherwise gcc doesn't comp !! 25
97 CC_FLAGS_FPU += -mhard-float !! 26 #
98 CC_FLAGS_FPU += $(call cc-option,-msse -mprefe !! 27 # Enable processor type. Ordering of these is important - we want to
99 endif !! 28 # use the minimum processor type of the range we support. The logic
100 !! 29 # for 680x0 will only allow use of the -m68060 or -m68040 if no other
101 ifeq ($(CONFIG_X86_KERNEL_IBT),y) !! 30 # 680x0 type is specified - and no option is specified for 68030 or
102 # !! 31 # 68020. The other m68k/ColdFire types always specify some type of
103 # Kernel IBT has S_CET.NOTRACK_EN=0, as such t !! 32 # compiler cpu type flag.
104 # NOTRACK prefixes. Current generation compile !! 33 #
105 # for jump-tables, as such, disable jump-table !! 34 ifndef CONFIG_M68040
106 # !! 35 cpuflags-$(CONFIG_M68060) = -m68060
107 # (jump-tables are implicitly disabled by RETP !! 36 endif
108 # !! 37 ifndef CONFIG_M68060
109 # https://gcc.gnu.org/bugzilla/show_bug.cgi? !! 38 cpuflags-$(CONFIG_M68040) = -m68040
110 # !! 39 endif
111 KBUILD_CFLAGS += $(call cc-option,-fcf-protect !! 40 cpuflags-$(CONFIG_M68030) =
112 KBUILD_RUSTFLAGS += -Zcf-protection=branch -Zn !! 41 cpuflags-$(CONFIG_M68020) =
113 else !! 42 cpuflags-$(CONFIG_M68000) = -m68000
114 KBUILD_CFLAGS += $(call cc-option,-fcf-protect !! 43 cpuflags-$(CONFIG_M5441x) = $(call cc-option,-mcpu=54455,-mcfv4e)
115 endif !! 44 cpuflags-$(CONFIG_M54xx) = $(call cc-option,-mcpu=5475,-m5200)
116 !! 45 cpuflags-$(CONFIG_M5407) = $(call cc-option,-mcpu=5407,-m5200)
117 ifeq ($(CONFIG_X86_32),y) !! 46 cpuflags-$(CONFIG_M532x) = $(call cc-option,-mcpu=532x,-m5307)
118 BITS := 32 !! 47 cpuflags-$(CONFIG_M537x) = $(call cc-option,-mcpu=537x,-m5307)
119 UTS_MACHINE := i386 !! 48 cpuflags-$(CONFIG_M5307) = $(call cc-option,-mcpu=5307,-m5200)
120 CHECKFLAGS += -D__i386__ !! 49 cpuflags-$(CONFIG_M528x) = $(call cc-option,-mcpu=528x,-m5307)
121 !! 50 cpuflags-$(CONFIG_M5275) = $(call cc-option,-mcpu=5275,-m5307)
122 KBUILD_AFLAGS += -m32 !! 51 cpuflags-$(CONFIG_M5272) = $(call cc-option,-mcpu=5272,-m5307)
123 KBUILD_CFLAGS += -m32 !! 52 cpuflags-$(CONFIG_M5271) = $(call cc-option,-mcpu=5271,-m5307)
124 !! 53 cpuflags-$(CONFIG_M523x) = $(call cc-option,-mcpu=523x,-m5307)
125 KBUILD_CFLAGS += -msoft-float -mregpar !! 54 cpuflags-$(CONFIG_M525x) = $(call cc-option,-mcpu=5253,-m5200)
126 !! 55 cpuflags-$(CONFIG_M5249) = $(call cc-option,-mcpu=5249,-m5200)
127 # Never want PIC in a 32-bit kernel, p !! 56 cpuflags-$(CONFIG_M520x) = $(call cc-option,-mcpu=5208,-m5200)
128 # with nonstandard options !! 57 cpuflags-$(CONFIG_M5206e) = $(call cc-option,-mcpu=5206e,-m5200)
129 KBUILD_CFLAGS += -fno-pic !! 58 cpuflags-$(CONFIG_M5206) = $(call cc-option,-mcpu=5206,-m5200)
130 !! 59
131 # Align the stack to the register widt !! 60 # Evaluate tune cc-option calls now
132 # alignment of 16 bytes. This reduces !! 61 cpuflags-y := $(cpuflags-y)
133 # alignment instructions. !! 62
134 KBUILD_CFLAGS += $(cc_stack_align4) !! 63 KBUILD_AFLAGS += $(cpuflags-y)
135 !! 64 KBUILD_CFLAGS += $(cpuflags-y)
136 # CPU-specific tuning. Anything which !! 65
137 include $(srctree)/arch/x86/Makefile_3 !! 66 KBUILD_CFLAGS += -pipe -ffreestanding
138 KBUILD_CFLAGS += $(cflags-y) !! 67
139 !! 68 ifdef CONFIG_MMU
140 # temporary until string.h is fixed !! 69 # without -fno-strength-reduce the 53c7xx.c driver fails ;-(
141 KBUILD_CFLAGS += -ffreestanding !! 70 KBUILD_CFLAGS += -fno-strength-reduce -ffixed-a2
142 <<
143 ifeq ($(CONFIG_STACKPROTECTOR),y) <<
144 ifeq ($(CONFIG_SMP),y) <<
145 KBUILD_CFLAGS += -msta <<
146 else <<
147 KBUILD_CFLAGS += -msta <<
148 endif <<
149 endif <<
150 else 71 else
151 BITS := 64 !! 72 # we can use a m68k-linux-gcc toolchain with these in place
152 UTS_MACHINE := x86_64 !! 73 KBUILD_CPPFLAGS += -DUTS_SYSNAME=\"uClinux\"
153 CHECKFLAGS += -D__x86_64__ !! 74 KBUILD_CPPFLAGS += -D__uClinux__
154 <<
155 KBUILD_AFLAGS += -m64 <<
156 KBUILD_CFLAGS += -m64 <<
157 <<
158 # Align jump targets to 1 byte, not th <<
159 KBUILD_CFLAGS += $(call cc-option,-fal <<
160 <<
161 # Pack loops tightly as well: <<
162 KBUILD_CFLAGS += $(call cc-option,-fal <<
163 <<
164 # Don't autogenerate traditional x87 i <<
165 KBUILD_CFLAGS += -mno-80387 <<
166 KBUILD_CFLAGS += $(call cc-option,-mno <<
167 <<
168 # By default gcc and clang use a stack <<
169 # However the standard kernel entry on <<
170 # 8-byte boundary. If the compiler isn <<
171 # alignment it will generate extra ali <<
172 # default alignment which keep the sta <<
173 # Furthermore an alignment to the regi <<
174 # and the number of alignment instruct <<
175 KBUILD_CFLAGS += $(cc_stack_align8) <<
176 <<
177 # Use -mskip-rax-setup if supported. <<
178 KBUILD_CFLAGS += $(call cc-option,-msk <<
179 <<
180 # FIXME - should be integrated in Make <<
181 cflags-$(CONFIG_MK8) += -ma <<
182 cflags-$(CONFIG_MPSC) += -ma <<
183 cflags-$(CONFIG_MCORE2) += -ma <<
184 cflags-$(CONFIG_MATOM) += -ma <<
185 cflags-$(CONFIG_GENERIC_CPU) += -mt <<
186 KBUILD_CFLAGS += $(cflags-y) <<
187 <<
188 rustflags-$(CONFIG_MK8) += -Ct <<
189 rustflags-$(CONFIG_MPSC) += -Ct <<
190 rustflags-$(CONFIG_MCORE2) += -Ct <<
191 rustflags-$(CONFIG_MATOM) += -Ct <<
192 rustflags-$(CONFIG_GENERIC_CPU) += -Zt <<
193 KBUILD_RUSTFLAGS += $(rustflags-y) <<
194 <<
195 KBUILD_CFLAGS += -mno-red-zone <<
196 KBUILD_CFLAGS += -mcmodel=kernel <<
197 KBUILD_RUSTFLAGS += -Cno-redzone=y <<
198 KBUILD_RUSTFLAGS += -Ccode-model=kerne <<
199 endif 75 endif
200 76
201 # !! 77 KBUILD_LDFLAGS := -m m68kelf
202 # If the function graph tracer is used with mc <<
203 # '-maccumulate-outgoing-args' is needed to pr <<
204 # (https://gcc.gnu.org/bugzilla/show_bug.cgi?i <<
205 # <<
206 ifdef CONFIG_FUNCTION_GRAPH_TRACER <<
207 ifndef CONFIG_HAVE_FENTRY <<
208 ACCUMULATE_OUTGOING_ARGS := 1 <<
209 endif <<
210 endif <<
211 78
212 ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1) !! 79 ifdef CONFIG_SUN3
213 # This compiler flag is not supported !! 80 LDFLAGS_vmlinux = -N
214 KBUILD_CFLAGS += $(call cc-option,-mac <<
215 endif 81 endif
216 82
217 # Workaround for a gcc prelease that unfortuna !! 83 CHECKFLAGS += -D__mc68000__
218 KBUILD_CFLAGS += -Wno-sign-compare <<
219 # <<
220 KBUILD_CFLAGS += -fno-asynchronous-unwind-tabl <<
221 <<
222 # Avoid indirect branches in kernel to deal wi <<
223 ifdef CONFIG_MITIGATION_RETPOLINE <<
224 KBUILD_CFLAGS += $(RETPOLINE_CFLAGS) <<
225 KBUILD_RUSTFLAGS += $(RETPOLINE_RUSTFLAGS) <<
226 # Additionally, avoid generating expensive i <<
227 # are subject to retpolines for small number <<
228 # LLVM turns off jump table generation by de <<
229 # retpoline builds, however, gcc does not fo <<
230 # only been fixed starting from gcc stable v <<
231 # onwards, but not for older ones. See gcc b <<
232 ifndef CONFIG_CC_IS_CLANG <<
233 KBUILD_CFLAGS += -fno-jump-tables <<
234 endif <<
235 endif <<
236 84
237 ifdef CONFIG_MITIGATION_SLS <<
238 KBUILD_CFLAGS += -mharden-sls=all <<
239 endif <<
240 85
241 ifdef CONFIG_CALL_PADDING !! 86 ifdef CONFIG_KGDB
242 PADDING_CFLAGS := -fpatchable-function-entry=$ !! 87 # If configured for kgdb support, include debugging infos and keep the
243 KBUILD_CFLAGS += $(PADDING_CFLAGS) !! 88 # frame pointer
244 export PADDING_CFLAGS !! 89 KBUILD_CFLAGS := $(subst -fomit-frame-pointer,,$(KBUILD_CFLAGS)) -g
245 <<
246 PADDING_RUSTFLAGS := -Zpatchable-function-entr <<
247 KBUILD_RUSTFLAGS += $(PADDING_RUSTFLAGS) <<
248 export PADDING_RUSTFLAGS <<
249 endif <<
250 <<
251 KBUILD_LDFLAGS += -m elf_$(UTS_MACHINE) <<
252 <<
253 ifdef CONFIG_X86_NEED_RELOCS <<
254 LDFLAGS_vmlinux := --emit-relocs --discard-non <<
255 else <<
256 LDFLAGS_vmlinux := <<
257 endif 90 endif
258 91
259 # 92 #
260 # The 64-bit kernel must be aligned to 2MB. P !! 93 # Select the assembler head startup code. Order is important. The default
261 # the linker to force 2MB page size regardless !! 94 # head code is first, processor specific selections can override it after.
262 # by the linker. <<
263 # 95 #
264 ifdef CONFIG_X86_64 !! 96 head-y := arch/m68k/kernel/head.o
265 LDFLAGS_vmlinux += -z max-page-size=0x200000 !! 97 head-$(CONFIG_SUN3) := arch/m68k/kernel/sun3-head.o
266 endif !! 98 head-$(CONFIG_M68000) := arch/m68k/68000/head.o
267 !! 99 head-$(CONFIG_COLDFIRE) := arch/m68k/coldfire/head.o
268 <<
269 archscripts: scripts_basic <<
270 $(Q)$(MAKE) $(build)=arch/x86/tools re <<
271 100
272 ### !! 101 core-y += arch/m68k/
273 # Syscall table generation !! 102 libs-y += arch/m68k/lib/
274 103
275 archheaders: <<
276 $(Q)$(MAKE) $(build)=arch/x86/entry/sy <<
277 <<
278 ### <<
279 # Kernel objects <<
280 <<
281 libs-y += arch/x86/lib/ <<
282 <<
283 # drivers-y are linked after core-y <<
284 drivers-$(CONFIG_MATH_EMULATION) += arch/x86/m <<
285 drivers-$(CONFIG_PCI) += arch/x86/p <<
286 <<
287 # suspend and hibernation support <<
288 drivers-$(CONFIG_PM) += arch/x86/power/ <<
289 <<
290 drivers-$(CONFIG_VIDEO) += arch/x86/video/ <<
291 <<
292 #### <<
293 # boot loader support. Several targets are kep <<
294 <<
295 boot := arch/x86/boot <<
296 104
297 BOOT_TARGETS = bzdisk fdimage fdimage144 fdima !! 105 all: zImage
298 106
299 PHONY += bzImage $(BOOT_TARGETS) !! 107 lilo: vmlinux
>> 108 if [ -f $(INSTALL_PATH)/vmlinux ]; then mv -f $(INSTALL_PATH)/vmlinux $(INSTALL_PATH)/vmlinux.old; fi
>> 109 if [ -f $(INSTALL_PATH)/System.map ]; then mv -f $(INSTALL_PATH)/System.map $(INSTALL_PATH)/System.old; fi
>> 110 cat vmlinux > $(INSTALL_PATH)/vmlinux
>> 111 cp System.map $(INSTALL_PATH)/System.map
>> 112 if [ -x /sbin/lilo ]; then /sbin/lilo; else /etc/lilo/install; fi
300 113
301 # Default kernel to build !! 114 zImage compressed: vmlinux.gz
302 all: bzImage <<
303 115
304 # KBUILD_IMAGE specify target image being buil !! 116 vmlinux.gz: vmlinux
305 KBUILD_IMAGE := $(boot)/bzImage <<
306 117
307 bzImage: vmlinux !! 118 ifndef CONFIG_KGDB
308 ifeq ($(CONFIG_X86_DECODER_SELFTEST),y) !! 119 cp vmlinux vmlinux.tmp
309 $(Q)$(MAKE) $(build)=arch/x86/tools po !! 120 $(STRIP) vmlinux.tmp
>> 121 $(KGZIP) -9c vmlinux.tmp >vmlinux.gz
>> 122 rm vmlinux.tmp
>> 123 else
>> 124 $(KGZIP) -9c vmlinux >vmlinux.gz
310 endif 125 endif
311 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_ <<
312 $(Q)mkdir -p $(objtree)/arch/$(UTS_MAC <<
313 $(Q)ln -fsn ../../x86/boot/bzImage $(o <<
314 126
315 $(BOOT_TARGETS): vmlinux !! 127 bzImage: vmlinux.bz2
316 $(Q)$(MAKE) $(build)=$(boot) $@ <<
317 128
318 PHONY += install !! 129 vmlinux.bz2: vmlinux
319 install: <<
320 $(call cmd,install) <<
321 130
322 vdso-install-$(CONFIG_X86_64) += arc !! 131 ifndef CONFIG_KGDB
323 vdso-install-$(CONFIG_X86_X32_ABI) += arc !! 132 cp vmlinux vmlinux.tmp
324 vdso-install-$(CONFIG_COMPAT_32) += arc !! 133 $(STRIP) vmlinux.tmp
325 !! 134 $(KBZIP2) -1c vmlinux.tmp >vmlinux.bz2
326 archprepare: checkbin !! 135 rm vmlinux.tmp
327 checkbin: !! 136 else
328 ifdef CONFIG_MITIGATION_RETPOLINE !! 137 $(KBZIP2) -1c vmlinux >vmlinux.bz2
329 ifeq ($(RETPOLINE_CFLAGS),) <<
330 @echo "You are building kernel with no <<
331 @echo "Please update your compiler." > <<
332 @false <<
333 endif <<
334 endif 138 endif
335 139
336 ifdef CONFIG_UNWINDER_ORC !! 140 CLEAN_FILES += vmlinux.gz vmlinux.bz2
337 orc_hash_h := arch/$(SRCARCH)/include/generate <<
338 orc_hash_sh := $(srctree)/scripts/orc_hash.sh <<
339 targets += $(orc_hash_h) <<
340 quiet_cmd_orc_hash = GEN $@ <<
341 cmd_orc_hash = mkdir -p $(dir $@); \ <<
342 $(CONFIG_SHELL) $(orc_has <<
343 $(orc_hash_h): $(srctree)/arch/x86/include/asm <<
344 $(call if_changed,orc_hash) <<
345 archprepare: $(orc_hash_h) <<
346 endif <<
347 141
348 archclean: !! 142 archheaders:
349 $(Q)rm -rf $(objtree)/arch/i386 !! 143 $(Q)$(MAKE) $(build)=arch/m68k/kernel/syscalls all
350 $(Q)rm -rf $(objtree)/arch/x86_64 <<
351 <<
352 define archhelp <<
353 echo '* bzImage - Compressed k <<
354 echo ' install - Install kern <<
355 echo ' (distributio <<
356 echo ' $$(INSTALL_P <<
357 echo '' <<
358 echo ' fdimage - Create 1.4MB <<
359 echo ' fdimage144 - Create 1.4MB <<
360 echo ' fdimage288 - Create 2.8MB <<
361 echo ' hdimage - Create a BIO <<
362 echo ' isoimage - Create a boo <<
363 echo ' bzdisk/fdima <<
364 echo ' FDARGS="..." <<
365 echo ' FDINITRD=fil <<
366 144
367 endef !! 145 install:
>> 146 sh $(srctree)/arch/m68k/install.sh $(KERNELRELEASE) vmlinux.gz System.map "$(INSTALL_PATH)"
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