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Sam Ravnborg74b469f2007-10-25 19:42:04 +02001# Unified Makefile for i386 and x86_64
2
Sam Ravnborg2266cfd2007-10-25 20:31:19 +02003# select defconfig based on actual architecture
Sam Ravnborgd746d642007-11-12 20:14:19 +01004ifeq ($(ARCH),x86)
David Woodhouseffee0de2012-12-20 21:51:55 +00005 ifeq ($(shell uname -m),x86_64)
6 KBUILD_DEFCONFIG := x86_64_defconfig
7 else
Sam Ravnborgd746d642007-11-12 20:14:19 +01008 KBUILD_DEFCONFIG := i386_defconfig
David Woodhouseffee0de2012-12-20 21:51:55 +00009 endif
Sam Ravnborgd746d642007-11-12 20:14:19 +010010else
11 KBUILD_DEFCONFIG := $(ARCH)_defconfig
12endif
Sam Ravnborg2266cfd2007-10-25 20:31:19 +020013
David Woodhouse1c678da2014-01-08 11:21:20 +000014# How to compile the 16-bit code. Note we always compile for -march=i386;
15# that way we can complain to the user if the CPU is insufficient.
David Woodhousede3accd2014-01-29 12:16:47 +000016#
17# The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For
H. Peter Anvina9cfcce2014-06-04 13:16:48 -070018# older versions of GCC, include an *assembly* header to make sure that
19# gcc doesn't play any games behind our back.
20CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h
David Woodhousede3accd2014-01-29 12:16:47 +000021M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS))
22
23REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -D__KERNEL__ \
24 -DDISABLE_BRANCH_PROFILING \
David Woodhouse1c678da2014-01-08 11:21:20 +000025 -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
David Woodhouse1c678da2014-01-08 11:21:20 +000026 -fno-strict-aliasing -fomit-frame-pointer -fno-pic \
27 -mno-mmx -mno-sse \
28 $(call cc-option, -ffreestanding) \
David Woodhouse1c678da2014-01-08 11:21:20 +000029 $(call cc-option, -fno-stack-protector) \
30 $(call cc-option, -mpreferred-stack-boundary=2)
31export REALMODE_CFLAGS
32
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010033# BITS is used as extension for files which are available in a 32 bit
34# and a 64 bit version to simplify shared Makefiles.
35# e.g.: obj-y += foo_$(BITS).o
36export BITS
Sam Ravnborg74b469f2007-10-25 19:42:04 +020037
Kees Cooka0215062013-07-08 09:15:17 -070038ifdef CONFIG_X86_NEED_RELOCS
39 LDFLAGS_vmlinux := --emit-relocs
40endif
41
Sam Ravnborgd746d642007-11-12 20:14:19 +010042ifeq ($(CONFIG_X86_32),y)
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010043 BITS := 32
Andreas Herrmann8c6531f2007-11-19 23:58:57 +010044 UTS_MACHINE := i386
Sam Ravnborg4ba7e5c2008-01-30 13:32:23 +010045 CHECKFLAGS += -D__i386__
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010046
Sam Ravnborg4ba7e5c2008-01-30 13:32:23 +010047 biarch := $(call cc-option,-m32)
48 KBUILD_AFLAGS += $(biarch)
49 KBUILD_CFLAGS += $(biarch)
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010050
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010051 KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
52
Andrew Boie484d90e2012-08-10 11:49:06 -070053 # Never want PIC in a 32-bit kernel, prevent breakage with GCC built
54 # with nonstandard options
55 KBUILD_CFLAGS += -fno-pic
56
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010057 # 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:
Frans Popc7bd0412009-07-23 20:56:27 +020062 KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \
63 $(call cc-option,-fno-unit-at-a-time))
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010064
65 # CPU-specific tuning. Anything which can be shared with UML should go here.
Masahiro Yamadaa436bb72015-03-27 20:43:36 +090066 include arch/x86/Makefile_32.cpu
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010067 KBUILD_CFLAGS += $(cflags-y)
68
69 # temporary until string.h is fixed
70 KBUILD_CFLAGS += -ffreestanding
Sam Ravnborg74b469f2007-10-25 19:42:04 +020071else
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010072 BITS := 64
Andreas Herrmann8c6531f2007-11-19 23:58:57 +010073 UTS_MACHINE := x86_64
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010074 CHECKFLAGS += -D__x86_64__ -m64
75
George Spelvin14262d62014-05-07 17:05:52 -040076 biarch := -m64
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010077 KBUILD_AFLAGS += -m64
78 KBUILD_CFLAGS += -m64
79
Ingo Molnarbe6cb022015-04-10 14:08:46 +020080 # Align jump targets to 1 byte, not the default 16 bytes:
81 KBUILD_CFLAGS += -falign-jumps=1
82
Ingo Molnar52648e82015-05-17 07:56:54 +020083 # Pack loops tightly as well:
84 KBUILD_CFLAGS += -falign-loops=1
85
Rasmus Villemoes5c630082014-09-10 18:05:39 +020086 # Don't autogenerate traditional x87 instructions
Behan Webster8f2dd672014-04-21 22:40:27 -070087 KBUILD_CFLAGS += $(call cc-option,-mno-80387)
88 KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)
H. Peter Anvin5551a342013-11-20 13:31:49 -080089
H.J. Lud9b0cde92012-05-29 14:31:23 -070090 # Use -mpreferred-stack-boundary=3 if supported.
H. Peter Anvin5551a342013-11-20 13:31:49 -080091 KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3)
H.J. Lud9b0cde92012-05-29 14:31:23 -070092
H.J. Lud9ee948d2014-12-17 18:05:29 -080093 # Use -mskip-rax-setup if supported.
94 KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
95
Sam Ravnborg0a6ef372008-01-30 13:32:20 +010096 # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
97 cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
98 cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
99
100 cflags-$(CONFIG_MCORE2) += \
101 $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
Tobias Doerffel366d19e2009-08-21 23:06:23 +0200102 cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
103 $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100104 cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
105 KBUILD_CFLAGS += $(cflags-y)
106
107 KBUILD_CFLAGS += -mno-red-zone
108 KBUILD_CFLAGS += -mcmodel=kernel
109
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100110 # -funit-at-a-time shrinks the kernel .text considerably
111 # unfortunately it makes reading oopses harder.
112 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
113
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100114 # this works around some issues with generating unwind tables in older gccs
115 # newer gccs do it by default
Jan-Simon Möllerfd2d0a12013-10-20 00:36:47 +0200116 KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args)
Tejun Heo5d707e92009-02-09 22:17:39 +0900117endif
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100118
Kees Cook19952a92013-12-19 11:35:58 -0800119# Make sure compiler does not have buggy stack-protector support.
Tejun Heo5d707e92009-02-09 22:17:39 +0900120ifdef CONFIG_CC_STACKPROTECTOR
121 cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh
Kees Cook19952a92013-12-19 11:35:58 -0800122 ifneq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
123 $(warning stack-protector enabled but compiler support broken)
Tejun Heo5d707e92009-02-09 22:17:39 +0900124 endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200125endif
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100126
H. Peter Anvin0bf62762012-02-27 14:09:10 -0800127ifdef CONFIG_X86_X32
128 x32_ld_ok := $(call try-run,\
129 /bin/echo -e '1: .quad 1b' | \
Jean Delvareb1e0d8b2012-10-02 16:42:36 +0200130 $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \
H. Peter Anvin0bf62762012-02-27 14:09:10 -0800131 $(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \
132 $(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n)
Ingo Molnar8bd69c22012-02-28 10:35:06 +0100133 ifeq ($(x32_ld_ok),y)
134 CONFIG_X86_X32_ABI := y
135 KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI
136 KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI
137 else
138 $(warning CONFIG_X86_X32 enabled but no binutils support)
139 endif
H. Peter Anvin0bf62762012-02-27 14:09:10 -0800140endif
141export CONFIG_X86_X32_ABI
142
Vegard Nossumdfec0722008-04-04 00:51:41 +0200143# Don't unroll struct assignments with kmemcheck enabled
144ifeq ($(CONFIG_KMEMCHECK),y)
145 KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy)
146endif
147
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100148# Stackpointer is addressed different for 32 bit and 64 bit x86
149sp-$(CONFIG_X86_32) := esp
150sp-$(CONFIG_X86_64) := rsp
151
H. Peter Anvind7acb922010-10-13 16:00:29 -0700152# does binutils support specific instructions?
153asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1)
Jan Beulich75aaf4c2015-01-23 08:29:50 +0000154asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1)
Jan Beulich06325192014-02-27 08:47:02 +0000155asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1)
Jim Kukunasea4d26a2012-05-22 13:54:04 +1000156avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1)
Jim Kukunas70567412012-11-08 13:47:44 -0800157avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1)
H. Peter Anvind7acb922010-10-13 16:00:29 -0700158
Ingo Molnar131484c2015-05-28 12:21:47 +0200159KBUILD_AFLAGS += $(asinstr) $(avx_instr) $(avx2_instr)
160KBUILD_CFLAGS += $(asinstr) $(avx_instr) $(avx2_instr)
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100161
162LDFLAGS := -m elf_$(UTS_MACHINE)
Sam Ravnborg25dfeeb2008-01-30 13:32:21 +0100163
164# Speed up the build
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100165KBUILD_CFLAGS += -pipe
Sam Ravnborg25dfeeb2008-01-30 13:32:21 +0100166# Workaround for a gcc prelease that unfortunately was shipped in a suse release
167KBUILD_CFLAGS += -Wno-sign-compare
168#
169KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
170# prevent gcc from generating any FP code by mistake
Rasmus Villemoes5c630082014-09-10 18:05:39 +0200171KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
Andi Kleenc0e9afc2012-03-28 11:51:17 -0700172KBUILD_CFLAGS += $(call cc-option,-mno-avx,)
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100173
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100174KBUILD_CFLAGS += $(mflags-y)
175KBUILD_AFLAGS += $(mflags-y)
176
Michal Marek3ce9e532012-10-15 21:16:56 +0200177archscripts: scripts_basic
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300178 $(Q)$(MAKE) $(build)=arch/x86/tools relocs
179
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100180###
H. Peter Anvin303395a2011-11-11 16:07:41 -0800181# Syscall table generation
182
183archheaders:
184 $(Q)$(MAKE) $(build)=arch/x86/syscalls all
185
Vivek Goyal8fc5b4d2014-08-08 14:26:02 -0700186archprepare:
Vivek Goyal74ca3172014-08-29 15:18:46 -0700187ifeq ($(CONFIG_KEXEC_FILE),y)
Vivek Goyal8fc5b4d2014-08-08 14:26:02 -0700188 $(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c
Vivek Goyal8fc5b4d2014-08-08 14:26:02 -0700189endif
190
H. Peter Anvin303395a2011-11-11 16:07:41 -0800191###
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100192# Kernel objects
193
Eric W. Biederman700efc12008-02-23 09:58:20 +0100194head-y := arch/x86/kernel/head_$(BITS).o
195head-y += arch/x86/kernel/head$(BITS).o
Huang, Ying0c51a962008-06-02 14:26:23 +0800196head-y += arch/x86/kernel/head.o
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100197
198libs-y += arch/x86/lib/
199
Sam Ravnborgd1f0ae52009-04-15 21:34:55 +0200200# See arch/x86/Kbuild for content of core part of the kernel
201core-y += arch/x86/
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100202
203# drivers-y are linked after core-y
204drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
205drivers-$(CONFIG_PCI) += arch/x86/pci/
206
207# must be linked after kernel/
208drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
209
Rafael J. Wysockicf7700f2008-02-09 23:24:09 +0100210# suspend and hibernation support
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100211drivers-$(CONFIG_PM) += arch/x86/power/
Rafael J. Wysockicf7700f2008-02-09 23:24:09 +0100212
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100213drivers-$(CONFIG_FB) += arch/x86/video/
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100214
215####
216# boot loader support. Several targets are kept for legacy purposes
217
218boot := arch/x86/boot
219
H. Peter Anvin1648e4f2009-04-17 10:46:37 -0700220BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage
H. Peter Anvinf9c51072009-03-12 12:50:33 -0700221
222PHONY += bzImage $(BOOT_TARGETS)
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100223
224# Default kernel to build
225all: bzImage
226
227# KBUILD_IMAGE specify target image being built
H. Peter Anvinf9c51072009-03-12 12:50:33 -0700228KBUILD_IMAGE := $(boot)/bzImage
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100229
H. Peter Anvinf9c51072009-03-12 12:50:33 -0700230bzImage: vmlinux
Masami Hiramatsuca0e9ba2009-08-13 16:34:21 -0400231ifeq ($(CONFIG_X86_DECODER_SELFTEST),y)
232 $(Q)$(MAKE) $(build)=arch/x86/tools posttest
233endif
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100234 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
235 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
Jan Beulich41b3eae2008-04-22 16:29:26 +0100236 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100237
H. Peter Anvinf9c51072009-03-12 12:50:33 -0700238$(BOOT_TARGETS): vmlinux
239 $(Q)$(MAKE) $(build)=$(boot) $@
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100240
H. Peter Anvin1648e4f2009-04-17 10:46:37 -0700241PHONY += install
242install:
243 $(Q)$(MAKE) $(build)=$(boot) $@
244
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100245PHONY += vdso_install
246vdso_install:
Ingo Molnard603c8e2015-06-03 18:05:44 +0200247 $(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100248
249archclean:
250 $(Q)rm -rf $(objtree)/arch/i386
251 $(Q)rm -rf $(objtree)/arch/x86_64
252 $(Q)$(MAKE) $(clean)=$(boot)
Jarkko Sakkinenb2d668d2012-05-21 20:51:24 +0300253 $(Q)$(MAKE) $(clean)=arch/x86/tools
Michael Wellingb0108f92014-08-29 15:19:13 -0700254 $(Q)$(MAKE) $(clean)=arch/x86/purgatory
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100255
256define archhelp
Andi Kleen37f30e22008-01-30 13:32:49 +0100257 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
258 echo ' install - Install kernel using'
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200259 echo ' (your) ~/bin/$(INSTALLKERNEL) or'
260 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
Andi Kleen37f30e22008-01-30 13:32:49 +0100261 echo ' install to $$(INSTALL_PATH) and run lilo'
262 echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
263 echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
264 echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
265 echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
266 echo ' bzdisk/fdimage*/isoimage also accept:'
267 echo ' FDARGS="..." arguments for the booted kernel'
268 echo ' FDINITRD=file initrd for the booted kernel'
Sam Ravnborg0a6ef372008-01-30 13:32:20 +0100269endef