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Commit | Line | Data |
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74b469f2 SR |
1 | # Unified Makefile for i386 and x86_64 |
2 | ||
2266cfd5 | 3 | # select defconfig based on actual architecture |
d746d647 SR |
4 | ifeq ($(ARCH),x86) |
5 | KBUILD_DEFCONFIG := i386_defconfig | |
6 | else | |
7 | KBUILD_DEFCONFIG := $(ARCH)_defconfig | |
8 | endif | |
2266cfd5 | 9 | |
0a6ef376 SR |
10 | # BITS is used as extension for files which are available in a 32 bit |
11 | # and a 64 bit version to simplify shared Makefiles. | |
12 | # e.g.: obj-y += foo_$(BITS).o | |
13 | export BITS | |
74b469f2 | 14 | |
d746d647 | 15 | ifeq ($(CONFIG_X86_32),y) |
0a6ef376 | 16 | BITS := 32 |
8c6531f7 | 17 | UTS_MACHINE := i386 |
4ba7e5cd | 18 | CHECKFLAGS += -D__i386__ |
0a6ef376 | 19 | |
4ba7e5cd SR |
20 | biarch := $(call cc-option,-m32) |
21 | KBUILD_AFLAGS += $(biarch) | |
22 | KBUILD_CFLAGS += $(biarch) | |
0a6ef376 SR |
23 | |
24 | ifdef CONFIG_RELOCATABLE | |
25 | LDFLAGS_vmlinux := --emit-relocs | |
26 | endif | |
0a6ef376 SR |
27 | |
28 | KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return | |
29 | ||
30 | # prevent gcc from keeping the stack 16 byte aligned | |
31 | KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2) | |
32 | ||
33 | # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use | |
34 | # a lot more stack due to the lack of sharing of stacklots: | |
c7bd0414 FP |
35 | KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \ |
36 | $(call cc-option,-fno-unit-at-a-time)) | |
0a6ef376 SR |
37 | |
38 | # CPU-specific tuning. Anything which can be shared with UML should go here. | |
39 | include $(srctree)/arch/x86/Makefile_32.cpu | |
40 | KBUILD_CFLAGS += $(cflags-y) | |
41 | ||
42 | # temporary until string.h is fixed | |
43 | KBUILD_CFLAGS += -ffreestanding | |
74b469f2 | 44 | else |
0a6ef376 | 45 | BITS := 64 |
8c6531f7 | 46 | UTS_MACHINE := x86_64 |
0a6ef376 SR |
47 | CHECKFLAGS += -D__x86_64__ -m64 |
48 | ||
49 | KBUILD_AFLAGS += -m64 | |
50 | KBUILD_CFLAGS += -m64 | |
51 | ||
52 | # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) | |
53 | cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) | |
54 | cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) | |
55 | ||
56 | cflags-$(CONFIG_MCORE2) += \ | |
57 | $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) | |
366d19e1 TD |
58 | cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \ |
59 | $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) | |
0a6ef376 SR |
60 | cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) |
61 | KBUILD_CFLAGS += $(cflags-y) | |
62 | ||
63 | KBUILD_CFLAGS += -mno-red-zone | |
64 | KBUILD_CFLAGS += -mcmodel=kernel | |
65 | ||
0a6ef376 SR |
66 | # -funit-at-a-time shrinks the kernel .text considerably |
67 | # unfortunately it makes reading oopses harder. | |
68 | KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) | |
69 | ||
0a6ef376 SR |
70 | # this works around some issues with generating unwind tables in older gccs |
71 | # newer gccs do it by default | |
72 | KBUILD_CFLAGS += -maccumulate-outgoing-args | |
5d707e9c | 73 | endif |
0a6ef376 | 74 | |
5d707e9c TH |
75 | ifdef CONFIG_CC_STACKPROTECTOR |
76 | cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh | |
08c2b394 | 77 | ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) |
5d707e9c | 78 | stackp-y := -fstack-protector |
5d707e9c TH |
79 | KBUILD_CFLAGS += $(stackp-y) |
80 | else | |
81 | $(warning stack protector enabled but no compiler support) | |
82 | endif | |
0a6ef376 SR |
83 | endif |
84 | ||
0bf62763 PA |
85 | ifdef CONFIG_X86_X32 |
86 | x32_ld_ok := $(call try-run,\ | |
87 | /bin/echo -e '1: .quad 1b' | \ | |
88 | $(CC) $(KBUILD_AFLAGS) -c -xassembler -o "$$TMP" - && \ | |
89 | $(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \ | |
90 | $(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n) | |
91 | ifeq ($(x32_ld_ok),y) | |
92 | CONFIG_X86_X32_ABI := y | |
93 | KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI | |
94 | KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI | |
95 | else | |
96 | $(warning CONFIG_X86_X32 enabled but no binutils support) | |
97 | endif | |
98 | endif | |
99 | export CONFIG_X86_X32_ABI | |
100 | ||
dfec072e VN |
101 | # Don't unroll struct assignments with kmemcheck enabled |
102 | ifeq ($(CONFIG_KMEMCHECK),y) | |
103 | KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy) | |
104 | endif | |
105 | ||
0a6ef376 SR |
106 | # Stackpointer is addressed different for 32 bit and 64 bit x86 |
107 | sp-$(CONFIG_X86_32) := esp | |
108 | sp-$(CONFIG_X86_64) := rsp | |
109 | ||
110 | # do binutils support CFI? | |
111 | cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1) | |
112 | # is .cfi_signal_frame supported too? | |
113 | cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1) | |
9e565292 | 114 | cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1) |
d7acb92f PA |
115 | |
116 | # does binutils support specific instructions? | |
117 | asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1) | |
118 | ||
119 | KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) | |
120 | KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) | |
0a6ef376 SR |
121 | |
122 | LDFLAGS := -m elf_$(UTS_MACHINE) | |
25dfeeb7 SR |
123 | |
124 | # Speed up the build | |
0a6ef376 | 125 | KBUILD_CFLAGS += -pipe |
25dfeeb7 SR |
126 | # Workaround for a gcc prelease that unfortunately was shipped in a suse release |
127 | KBUILD_CFLAGS += -Wno-sign-compare | |
128 | # | |
129 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables | |
130 | # prevent gcc from generating any FP code by mistake | |
131 | KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,) | |
0a6ef376 | 132 | |
0a6ef376 SR |
133 | KBUILD_CFLAGS += $(mflags-y) |
134 | KBUILD_AFLAGS += $(mflags-y) | |
135 | ||
303395ac PA |
136 | ### |
137 | # Syscall table generation | |
138 | ||
139 | archheaders: | |
140 | $(Q)$(MAKE) $(build)=arch/x86/syscalls all | |
141 | ||
0a6ef376 SR |
142 | ### |
143 | # Kernel objects | |
144 | ||
700efc1b EB |
145 | head-y := arch/x86/kernel/head_$(BITS).o |
146 | head-y += arch/x86/kernel/head$(BITS).o | |
0c51a965 | 147 | head-y += arch/x86/kernel/head.o |
700efc1b | 148 | head-y += arch/x86/kernel/init_task.o |
0a6ef376 SR |
149 | |
150 | libs-y += arch/x86/lib/ | |
151 | ||
d1f0ae5e SR |
152 | # See arch/x86/Kbuild for content of core part of the kernel |
153 | core-y += arch/x86/ | |
0a6ef376 SR |
154 | |
155 | # drivers-y are linked after core-y | |
156 | drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/ | |
157 | drivers-$(CONFIG_PCI) += arch/x86/pci/ | |
158 | ||
159 | # must be linked after kernel/ | |
160 | drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/ | |
161 | ||
cf7700fe | 162 | # suspend and hibernation support |
0a6ef376 | 163 | drivers-$(CONFIG_PM) += arch/x86/power/ |
cf7700fe | 164 | |
0a6ef376 | 165 | drivers-$(CONFIG_FB) += arch/x86/video/ |
0a6ef376 SR |
166 | |
167 | #### | |
168 | # boot loader support. Several targets are kept for legacy purposes | |
169 | ||
170 | boot := arch/x86/boot | |
171 | ||
1648e4f8 | 172 | BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage |
f9c5107c PA |
173 | |
174 | PHONY += bzImage $(BOOT_TARGETS) | |
0a6ef376 SR |
175 | |
176 | # Default kernel to build | |
177 | all: bzImage | |
178 | ||
179 | # KBUILD_IMAGE specify target image being built | |
f9c5107c | 180 | KBUILD_IMAGE := $(boot)/bzImage |
0a6ef376 | 181 | |
f9c5107c | 182 | bzImage: vmlinux |
ca0e9bad MH |
183 | ifeq ($(CONFIG_X86_DECODER_SELFTEST),y) |
184 | $(Q)$(MAKE) $(build)=arch/x86/tools posttest | |
185 | endif | |
0a6ef376 SR |
186 | $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE) |
187 | $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot | |
41b3eae6 | 188 | $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@ |
0a6ef376 | 189 | |
f9c5107c PA |
190 | $(BOOT_TARGETS): vmlinux |
191 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
0a6ef376 | 192 | |
1648e4f8 PA |
193 | PHONY += install |
194 | install: | |
195 | $(Q)$(MAKE) $(build)=$(boot) $@ | |
196 | ||
0a6ef376 SR |
197 | PHONY += vdso_install |
198 | vdso_install: | |
199 | $(Q)$(MAKE) $(build)=arch/x86/vdso $@ | |
200 | ||
201 | archclean: | |
202 | $(Q)rm -rf $(objtree)/arch/i386 | |
203 | $(Q)rm -rf $(objtree)/arch/x86_64 | |
204 | $(Q)$(MAKE) $(clean)=$(boot) | |
205 | ||
206 | define archhelp | |
37f30e21 AK |
207 | echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)' |
208 | echo ' install - Install kernel using' | |
caa27b66 SR |
209 | echo ' (your) ~/bin/$(INSTALLKERNEL) or' |
210 | echo ' (distribution) /sbin/$(INSTALLKERNEL) or' | |
37f30e21 AK |
211 | echo ' install to $$(INSTALL_PATH) and run lilo' |
212 | echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
213 | echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)' | |
214 | echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)' | |
215 | echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)' | |
216 | echo ' bzdisk/fdimage*/isoimage also accept:' | |
217 | echo ' FDARGS="..." arguments for the booted kernel' | |
218 | echo ' FDINITRD=file initrd for the booted kernel' | |
0a6ef376 | 219 | endef |