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 # 1 #
71 # Prevent GCC from generating any FP code by m !! 2 # m68k/Makefile
72 # 3 #
73 # This must happen before we try the -mpreferr !! 4 # This file is included by the global makefile so that you can add your own
>> 5 # architecture-specific flags and dependencies.
74 # 6 #
75 # https://gcc.gnu.org/bugzilla/show_bug.cgi !! 7 # This file is subject to the terms and conditions of the GNU General Public
>> 8 # License. See the file "COPYING" in the main directory of this archive
>> 9 # for more details.
76 # 10 #
77 KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 - !! 11 # Copyright (C) 1994 by Hamish Macdonald
78 KBUILD_RUSTFLAGS += --target=$(objtree)/script !! 12 # Copyright (C) 2002,2011 Greg Ungerer <gerg@snapgear.com>
79 KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse <<
80 <<
81 # <<
82 # CFLAGS for compiling floating point code ins <<
83 # <<
84 CC_FLAGS_FPU := -msse -msse2 <<
85 ifdef CONFIG_CC_IS_GCC <<
86 # Stack alignment mismatch, proceed with cauti <<
87 # GCC < 7.1 cannot compile code using `double` <<
88 # (8B stack alignment). <<
89 # See https://gcc.gnu.org/bugzilla/show_bug.cg <<
90 # <<
91 # The "-msse" in the first argument is there s <<
92 # -mpreferred-stack-boundary=3 build error: <<
93 # 13 #
94 # -mpreferred-stack-boundary=3 is not between <<
95 # <<
96 # can be triggered. Otherwise gcc doesn't comp <<
97 CC_FLAGS_FPU += -mhard-float <<
98 CC_FLAGS_FPU += $(call cc-option,-msse -mprefe <<
99 endif <<
100 14
101 ifeq ($(CONFIG_X86_KERNEL_IBT),y) !! 15 KBUILD_DEFCONFIG := multi_defconfig
102 # <<
103 # Kernel IBT has S_CET.NOTRACK_EN=0, as such t <<
104 # NOTRACK prefixes. Current generation compile <<
105 # for jump-tables, as such, disable jump-table <<
106 # <<
107 # (jump-tables are implicitly disabled by RETP <<
108 # <<
109 # https://gcc.gnu.org/bugzilla/show_bug.cgi? <<
110 # <<
111 KBUILD_CFLAGS += $(call cc-option,-fcf-protect <<
112 KBUILD_RUSTFLAGS += -Zcf-protection=branch -Zn <<
113 else <<
114 KBUILD_CFLAGS += $(call cc-option,-fcf-protect <<
115 endif <<
116 16
117 ifeq ($(CONFIG_X86_32),y) !! 17 ifdef cross_compiling
118 BITS := 32 !! 18 ifeq ($(CROSS_COMPILE),)
119 UTS_MACHINE := i386 !! 19 CROSS_COMPILE := $(call cc-cross-prefix, \
120 CHECKFLAGS += -D__i386__ !! 20 m68k-linux-gnu- m68k-linux- m68k-unknown-linux-gnu-)
121 <<
122 KBUILD_AFLAGS += -m32 <<
123 KBUILD_CFLAGS += -m32 <<
124 <<
125 KBUILD_CFLAGS += -msoft-float -mregpar <<
126 <<
127 # Never want PIC in a 32-bit kernel, p <<
128 # with nonstandard options <<
129 KBUILD_CFLAGS += -fno-pic <<
130 <<
131 # Align the stack to the register widt <<
132 # alignment of 16 bytes. This reduces <<
133 # alignment instructions. <<
134 KBUILD_CFLAGS += $(cc_stack_align4) <<
135 <<
136 # CPU-specific tuning. Anything which <<
137 include $(srctree)/arch/x86/Makefile_3 <<
138 KBUILD_CFLAGS += $(cflags-y) <<
139 <<
140 # temporary until string.h is fixed <<
141 KBUILD_CFLAGS += -ffreestanding <<
142 <<
143 ifeq ($(CONFIG_STACKPROTECTOR),y) <<
144 ifeq ($(CONFIG_SMP),y) <<
145 KBUILD_CFLAGS += -msta <<
146 else <<
147 KBUILD_CFLAGS += -msta <<
148 endif <<
149 endif 21 endif
150 else <<
151 BITS := 64 <<
152 UTS_MACHINE := x86_64 <<
153 CHECKFLAGS += -D__x86_64__ <<
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 += $(rustflags-y) <<
194 <<
195 KBUILD_CFLAGS += -mno-red-zone <<
196 KBUILD_CFLAGS += -mcmodel=kernel <<
197 KBUILD_RUSTFLAGS += -Cno-redzone=y <<
198 KBUILD_RUSTFLAGS += -Ccode-model=kerne <<
199 endif 22 endif
200 23
201 # 24 #
202 # If the function graph tracer is used with mc !! 25 # Enable processor type. Ordering of these is important - we want to
203 # '-maccumulate-outgoing-args' is needed to pr !! 26 # use the minimum processor type of the range we support. The logic
204 # (https://gcc.gnu.org/bugzilla/show_bug.cgi?i !! 27 # for 680x0 will only allow use of the -m68060 or -m68040 if no other
205 # !! 28 # 680x0 type is specified - and no option is specified for 68030 or
206 ifdef CONFIG_FUNCTION_GRAPH_TRACER !! 29 # 68020. The other m68k/ColdFire types always specify some type of
207 ifndef CONFIG_HAVE_FENTRY !! 30 # compiler cpu type flag.
208 ACCUMULATE_OUTGOING_ARGS := 1 !! 31 #
209 endif !! 32 ifndef CONFIG_M68040
210 endif !! 33 cpuflags-$(CONFIG_M68060) = -m68060
>> 34 endif
>> 35 ifndef CONFIG_M68060
>> 36 cpuflags-$(CONFIG_M68040) = -m68040
>> 37 endif
>> 38 cpuflags-$(CONFIG_M68030) =
>> 39 cpuflags-$(CONFIG_M68020) =
>> 40 cpuflags-$(CONFIG_M68000) = -m68000
>> 41 cpuflags-$(CONFIG_M5441x) = $(call cc-option,-mcpu=54455,-mcfv4e)
>> 42 cpuflags-$(CONFIG_M54xx) = $(call cc-option,-mcpu=5475,-m5200)
>> 43 cpuflags-$(CONFIG_M5407) = $(call cc-option,-mcpu=5407,-m5200)
>> 44 cpuflags-$(CONFIG_M532x) = $(call cc-option,-mcpu=532x,-m5307)
>> 45 cpuflags-$(CONFIG_M537x) = $(call cc-option,-mcpu=537x,-m5307)
>> 46 cpuflags-$(CONFIG_M5307) = $(call cc-option,-mcpu=5307,-m5200)
>> 47 cpuflags-$(CONFIG_M528x) = $(call cc-option,-mcpu=528x,-m5307)
>> 48 cpuflags-$(CONFIG_M5275) = $(call cc-option,-mcpu=5275,-m5307)
>> 49 cpuflags-$(CONFIG_M5272) = $(call cc-option,-mcpu=5272,-m5307)
>> 50 cpuflags-$(CONFIG_M5271) = $(call cc-option,-mcpu=5271,-m5307)
>> 51 cpuflags-$(CONFIG_M523x) = $(call cc-option,-mcpu=523x,-m5307)
>> 52 cpuflags-$(CONFIG_M525x) = $(call cc-option,-mcpu=5253,-m5200)
>> 53 cpuflags-$(CONFIG_M5249) = $(call cc-option,-mcpu=5249,-m5200)
>> 54 cpuflags-$(CONFIG_M520x) = $(call cc-option,-mcpu=5208,-m5200)
>> 55 cpuflags-$(CONFIG_M5206e) = $(call cc-option,-mcpu=5206e,-m5200)
>> 56 cpuflags-$(CONFIG_M5206) = $(call cc-option,-mcpu=5206,-m5200)
>> 57
>> 58 # Evaluate tune cc-option calls now
>> 59 cpuflags-y := $(cpuflags-y)
211 60
212 ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1) !! 61 KBUILD_AFLAGS += $(cpuflags-y)
213 # This compiler flag is not supported !! 62 KBUILD_CFLAGS += $(cpuflags-y)
214 KBUILD_CFLAGS += $(call cc-option,-mac <<
215 endif <<
216 63
217 # Workaround for a gcc prelease that unfortuna !! 64 KBUILD_CFLAGS += -pipe -ffreestanding
218 KBUILD_CFLAGS += -Wno-sign-compare <<
219 # <<
220 KBUILD_CFLAGS += -fno-asynchronous-unwind-tabl <<
221 65
222 # Avoid indirect branches in kernel to deal wi !! 66 ifdef CONFIG_MMU
223 ifdef CONFIG_MITIGATION_RETPOLINE !! 67 KBUILD_CFLAGS += -ffixed-a2
224 KBUILD_CFLAGS += $(RETPOLINE_CFLAGS) !! 68 else
225 KBUILD_RUSTFLAGS += $(RETPOLINE_RUSTFLAGS) !! 69 # we can use a m68k-linux-gcc toolchain with these in place
226 # Additionally, avoid generating expensive i !! 70 KBUILD_CPPFLAGS += -DUTS_SYSNAME=\"uClinux\"
227 # are subject to retpolines for small number !! 71 KBUILD_CPPFLAGS += -D__uClinux__
228 # LLVM turns off jump table generation by de <<
229 # retpoline builds, however, gcc does not fo <<
230 # only been fixed starting from gcc stable v <<
231 # onwards, but not for older ones. See gcc b <<
232 ifndef CONFIG_CC_IS_CLANG <<
233 KBUILD_CFLAGS += -fno-jump-tables <<
234 endif <<
235 endif 72 endif
236 73
237 ifdef CONFIG_MITIGATION_SLS !! 74 KBUILD_LDFLAGS := -m m68kelf
238 KBUILD_CFLAGS += -mharden-sls=all <<
239 endif <<
240 75
241 ifdef CONFIG_CALL_PADDING !! 76 ifdef CONFIG_SUN3
242 PADDING_CFLAGS := -fpatchable-function-entry=$ !! 77 LDFLAGS_vmlinux = -N
243 KBUILD_CFLAGS += $(PADDING_CFLAGS) <<
244 export PADDING_CFLAGS <<
245 <<
246 PADDING_RUSTFLAGS := -Zpatchable-function-entr <<
247 KBUILD_RUSTFLAGS += $(PADDING_RUSTFLAGS) <<
248 export PADDING_RUSTFLAGS <<
249 endif 78 endif
250 79
251 KBUILD_LDFLAGS += -m elf_$(UTS_MACHINE) !! 80 CHECKFLAGS += -D__mc68000__
252 81
253 ifdef CONFIG_X86_NEED_RELOCS <<
254 LDFLAGS_vmlinux := --emit-relocs --discard-non <<
255 else <<
256 LDFLAGS_vmlinux := <<
257 endif <<
258 82
259 # !! 83 ifdef CONFIG_KGDB
260 # The 64-bit kernel must be aligned to 2MB. P !! 84 # If configured for kgdb support, include debugging infos and keep the
261 # the linker to force 2MB page size regardless !! 85 # frame pointer
262 # by the linker. !! 86 KBUILD_CFLAGS := $(subst -fomit-frame-pointer,,$(KBUILD_CFLAGS)) -g
263 # <<
264 ifdef CONFIG_X86_64 <<
265 LDFLAGS_vmlinux += -z max-page-size=0x200000 <<
266 endif 87 endif
267 88
>> 89 libs-y += arch/m68k/lib/
268 90
269 archscripts: scripts_basic <<
270 $(Q)$(MAKE) $(build)=arch/x86/tools re <<
271 <<
272 ### <<
273 # Syscall table generation <<
274 <<
275 archheaders: <<
276 $(Q)$(MAKE) $(build)=arch/x86/entry/sy <<
277 <<
278 ### <<
279 # Kernel objects <<
280 <<
281 libs-y += arch/x86/lib/ <<
282 91
283 # drivers-y are linked after core-y !! 92 all: zImage
284 drivers-$(CONFIG_MATH_EMULATION) += arch/x86/m <<
285 drivers-$(CONFIG_PCI) += arch/x86/p <<
286 93
287 # suspend and hibernation support !! 94 lilo: vmlinux
288 drivers-$(CONFIG_PM) += arch/x86/power/ !! 95 if [ -f $(INSTALL_PATH)/vmlinux ]; then mv -f $(INSTALL_PATH)/vmlinux $(INSTALL_PATH)/vmlinux.old; fi
>> 96 if [ -f $(INSTALL_PATH)/System.map ]; then mv -f $(INSTALL_PATH)/System.map $(INSTALL_PATH)/System.old; fi
>> 97 cat vmlinux > $(INSTALL_PATH)/vmlinux
>> 98 cp System.map $(INSTALL_PATH)/System.map
>> 99 if [ -x /sbin/lilo ]; then /sbin/lilo; else /etc/lilo/install; fi
289 100
290 drivers-$(CONFIG_VIDEO) += arch/x86/video/ !! 101 zImage compressed: vmlinux.gz
291 102
292 #### !! 103 vmlinux.gz: vmlinux
293 # boot loader support. Several targets are kep <<
294 104
295 boot := arch/x86/boot !! 105 ifndef CONFIG_KGDB
296 !! 106 cp vmlinux vmlinux.tmp
297 BOOT_TARGETS = bzdisk fdimage fdimage144 fdima !! 107 $(STRIP) vmlinux.tmp
298 !! 108 $(KGZIP) -9c vmlinux.tmp >vmlinux.gz
299 PHONY += bzImage $(BOOT_TARGETS) !! 109 rm vmlinux.tmp
300 !! 110 else
301 # Default kernel to build !! 111 $(KGZIP) -9c vmlinux >vmlinux.gz
302 all: bzImage <<
303 <<
304 # KBUILD_IMAGE specify target image being buil <<
305 KBUILD_IMAGE := $(boot)/bzImage <<
306 <<
307 bzImage: vmlinux <<
308 ifeq ($(CONFIG_X86_DECODER_SELFTEST),y) <<
309 $(Q)$(MAKE) $(build)=arch/x86/tools po <<
310 endif 112 endif
311 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_ <<
312 $(Q)mkdir -p $(objtree)/arch/$(UTS_MAC <<
313 $(Q)ln -fsn ../../x86/boot/bzImage $(o <<
314 113
315 $(BOOT_TARGETS): vmlinux !! 114 bzImage: vmlinux.bz2
316 $(Q)$(MAKE) $(build)=$(boot) $@ <<
317 115
318 PHONY += install !! 116 vmlinux.bz2: vmlinux
319 install: <<
320 $(call cmd,install) <<
321 117
322 vdso-install-$(CONFIG_X86_64) += arc !! 118 ifndef CONFIG_KGDB
323 vdso-install-$(CONFIG_X86_X32_ABI) += arc !! 119 cp vmlinux vmlinux.tmp
324 vdso-install-$(CONFIG_COMPAT_32) += arc !! 120 $(STRIP) vmlinux.tmp
325 !! 121 $(KBZIP2) -1c vmlinux.tmp >vmlinux.bz2
326 archprepare: checkbin !! 122 rm vmlinux.tmp
327 checkbin: !! 123 else
328 ifdef CONFIG_MITIGATION_RETPOLINE !! 124 $(KBZIP2) -1c vmlinux >vmlinux.bz2
329 ifeq ($(RETPOLINE_CFLAGS),) <<
330 @echo "You are building kernel with no <<
331 @echo "Please update your compiler." > <<
332 @false <<
333 endif <<
334 endif 125 endif
335 126
336 ifdef CONFIG_UNWINDER_ORC !! 127 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 <<
347 128
348 archclean: !! 129 archheaders:
349 $(Q)rm -rf $(objtree)/arch/i386 !! 130 $(Q)$(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 <<
366 131
367 endef !! 132 install: KBUILD_IMAGE := vmlinux.gz
>> 133 install:
>> 134 $(call cmd,install)
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