Makefile 7.3 KB
Newer Older
1 2
# Unified Makefile for i386 and x86_64

3
# select defconfig based on actual architecture
4 5 6 7 8
ifeq ($(ARCH),x86)
        KBUILD_DEFCONFIG := i386_defconfig
else
        KBUILD_DEFCONFIG := $(ARCH)_defconfig
endif
9

10 11 12 13
# BITS is used as extension for files which are available in a 32 bit
# and a 64 bit version to simplify shared Makefiles.
# e.g.: obj-y += foo_$(BITS).o
export BITS
14

15
ifeq ($(CONFIG_X86_32),y)
16
        BITS := 32
17
        UTS_MACHINE := i386
18
        CHECKFLAGS += -D__i386__
19

20 21 22
        biarch := $(call cc-option,-m32)
        KBUILD_AFLAGS += $(biarch)
        KBUILD_CFLAGS += $(biarch)
23 24 25 26 27 28 29 30 31 32 33 34

        ifdef CONFIG_RELOCATABLE
                LDFLAGS_vmlinux := --emit-relocs
        endif

        KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return

        # prevent gcc from keeping the stack 16 byte aligned
        KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)

        # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
        # a lot more stack due to the lack of sharing of stacklots:
35 36
        KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \
				$(call cc-option,-fno-unit-at-a-time))
37 38 39 40 41 42 43

        # CPU-specific tuning. Anything which can be shared with UML should go here.
        include $(srctree)/arch/x86/Makefile_32.cpu
        KBUILD_CFLAGS += $(cflags-y)

        # temporary until string.h is fixed
        KBUILD_CFLAGS += -ffreestanding
44
else
45
        BITS := 64
46
        UTS_MACHINE := x86_64
47 48 49 50 51 52 53 54 55 56 57
        CHECKFLAGS += -D__x86_64__ -m64

        KBUILD_AFLAGS += -m64
        KBUILD_CFLAGS += -m64

        # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
        cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
        cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)

        cflags-$(CONFIG_MCORE2) += \
                $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
58 59
	cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
		$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
60 61 62 63 64 65 66 67 68 69 70 71 72
        cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
        KBUILD_CFLAGS += $(cflags-y)

        KBUILD_CFLAGS += -mno-red-zone
        KBUILD_CFLAGS += -mcmodel=kernel

        # -funit-at-a-time shrinks the kernel .text considerably
        # unfortunately it makes reading oopses harder.
        KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)

        # this works around some issues with generating unwind tables in older gccs
        # newer gccs do it by default
        KBUILD_CFLAGS += -maccumulate-outgoing-args
T
Tejun Heo 已提交
73
endif
74

T
Tejun Heo 已提交
75 76
ifdef CONFIG_CC_STACKPROTECTOR
	cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh
77
        ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
T
Tejun Heo 已提交
78 79 80 81 82
                stackp-y := -fstack-protector
                KBUILD_CFLAGS += $(stackp-y)
        else
                $(warning stack protector enabled but no compiler support)
        endif
83 84
endif

85 86 87 88 89 90
ifdef CONFIG_X86_X32
	x32_ld_ok := $(call try-run,\
			/bin/echo -e '1: .quad 1b' | \
			$(CC) $(KBUILD_AFLAGS) -c -xassembler -o "$$TMP" - && \
			$(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \
			$(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n)
91 92 93 94 95 96 97
        ifeq ($(x32_ld_ok),y)
                CONFIG_X86_X32_ABI := y
                KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI
                KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI
        else
                $(warning CONFIG_X86_X32 enabled but no binutils support)
        endif
98 99 100
endif
export CONFIG_X86_X32_ABI

101 102 103 104 105
# Don't unroll struct assignments with kmemcheck enabled
ifeq ($(CONFIG_KMEMCHECK),y)
	KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy)
endif

106 107 108 109 110 111 112 113
# Stackpointer is addressed different for 32 bit and 64 bit x86
sp-$(CONFIG_X86_32) := esp
sp-$(CONFIG_X86_64) := rsp

# do binutils support CFI?
cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
# is .cfi_signal_frame supported too?
cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
114
cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1)
115 116 117 118 119 120

# does binutils support specific instructions?
asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1)

KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr)
KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr)
121 122

LDFLAGS := -m elf_$(UTS_MACHINE)
123 124

# Speed up the build
125
KBUILD_CFLAGS += -pipe
126 127 128 129 130 131
# Workaround for a gcc prelease that unfortunately was shipped in a suse release
KBUILD_CFLAGS += -Wno-sign-compare
#
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
# prevent gcc from generating any FP code by mistake
KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
A
Andi Kleen 已提交
132
KBUILD_CFLAGS += $(call cc-option,-mno-avx,)
133 134 135 136

KBUILD_CFLAGS += $(mflags-y)
KBUILD_AFLAGS += $(mflags-y)

137 138 139
archscripts:
	$(Q)$(MAKE) $(build)=arch/x86/tools relocs

140 141 142 143 144 145
###
# Syscall table generation

archheaders:
	$(Q)$(MAKE) $(build)=arch/x86/syscalls all

146 147 148
###
# Kernel objects

149 150
head-y := arch/x86/kernel/head_$(BITS).o
head-y += arch/x86/kernel/head$(BITS).o
151
head-y += arch/x86/kernel/head.o
152
head-y += arch/x86/kernel/init_task.o
153 154 155

libs-y  += arch/x86/lib/

S
Sam Ravnborg 已提交
156 157
# See arch/x86/Kbuild for content of core part of the kernel
core-y += arch/x86/
158 159 160 161 162 163 164 165

# drivers-y are linked after core-y
drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
drivers-$(CONFIG_PCI)            += arch/x86/pci/

# must be linked after kernel/
drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/

166
# suspend and hibernation support
167
drivers-$(CONFIG_PM) += arch/x86/power/
168

169 170 171 172 173 174 175
drivers-$(CONFIG_FB) += arch/x86/video/

####
# boot loader support. Several targets are kept for legacy purposes

boot := arch/x86/boot

176
BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage
177 178

PHONY += bzImage $(BOOT_TARGETS)
179 180 181 182 183

# Default kernel to build
all: bzImage

# KBUILD_IMAGE specify target image being built
184
KBUILD_IMAGE := $(boot)/bzImage
185

186
bzImage: vmlinux
187 188 189
ifeq ($(CONFIG_X86_DECODER_SELFTEST),y)
	$(Q)$(MAKE) $(build)=arch/x86/tools posttest
endif
190 191
	$(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
	$(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
192
	$(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
193

194 195
$(BOOT_TARGETS): vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $@
196

197 198 199 200
PHONY += install
install:
	$(Q)$(MAKE) $(build)=$(boot) $@

201 202 203 204 205 206 207 208 209 210
PHONY += vdso_install
vdso_install:
	$(Q)$(MAKE) $(build)=arch/x86/vdso $@

archclean:
	$(Q)rm -rf $(objtree)/arch/i386
	$(Q)rm -rf $(objtree)/arch/x86_64
	$(Q)$(MAKE) $(clean)=$(boot)

define archhelp
211 212
  echo  '* bzImage      - Compressed kernel image (arch/x86/boot/bzImage)'
  echo  '  install      - Install kernel using'
213 214
  echo  '                  (your) ~/bin/$(INSTALLKERNEL) or'
  echo  '                  (distribution) /sbin/$(INSTALLKERNEL) or'
215 216 217 218 219 220 221 222
  echo  '                  install to $$(INSTALL_PATH) and run lilo'
  echo  '  fdimage      - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
  echo  '  fdimage144   - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
  echo  '  fdimage288   - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
  echo  '  isoimage     - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
  echo  '                  bzdisk/fdimage*/isoimage also accept:'
  echo  '                  FDARGS="..."  arguments for the booted kernel'
  echo  '                  FDINITRD=file initrd for the booted kernel'
223
endef