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8c2c3df3 CM |
1 | # |
2 | # arch/arm64/Makefile | |
3 | # | |
4 | # This file is included by the global makefile so that you can add your own | |
5 | # architecture-specific flags and dependencies. | |
6 | # | |
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. | |
10 | # | |
11 | # Copyright (C) 1995-2001 by Russell King | |
12 | ||
1a381d4a | 13 | LDFLAGS_vmlinux :=--no-undefined -X |
8c2c3df3 | 14 | CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET) |
8c2c3df3 CM |
15 | GZFLAGS :=-9 |
16 | ||
fd9dde6a ND |
17 | ifeq ($(CONFIG_RELOCATABLE), y) |
18 | # Pass --no-apply-dynamic-relocs to restore pre-binutils-2.27 behaviour | |
19 | # for relative relocs, since this leads to better Image compression | |
20 | # with the relocation offsets always being zero. | |
3bbd3db8 | 21 | LDFLAGS_vmlinux += -shared -Bsymbolic -z notext -z norelro \ |
fd9dde6a | 22 | $(call ld-option, --no-apply-dynamic-relocs) |
1e48ef7f AB |
23 | endif |
24 | ||
6ffe9923 WD |
25 | ifeq ($(CONFIG_ARM64_ERRATUM_843419),y) |
26 | ifeq ($(call ld-option, --fix-cortex-a53-843419),) | |
27 | $(warning ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum) | |
28 | else | |
29 | LDFLAGS_vmlinux += --fix-cortex-a53-843419 | |
30 | endif | |
31 | endif | |
32 | ||
c09d6a04 WD |
33 | # Check for binutils support for specific extensions |
34 | lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1) | |
35 | ||
36 | ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y) | |
37 | ifeq ($(lseinstr),) | |
38 | $(warning LSE atomics not supported by binutils) | |
39 | endif | |
40 | endif | |
41 | ||
d91750f1 | 42 | ifeq ($(CONFIG_ARM64), y) |
bbb56c27 MZ |
43 | brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1) |
44 | ||
d91750f1 | 45 | ifneq ($(brokengasinst),) |
bbb56c27 | 46 | $(warning Detected assembler with broken .inst; disassembly will be unreliable) |
d91750f1 | 47 | endif |
bbb56c27 MZ |
48 | endif |
49 | ||
bfe801eb VF |
50 | ifeq ($(CONFIG_GENERIC_COMPAT_VDSO), y) |
51 | CROSS_COMPILE_COMPAT ?= $(CONFIG_CROSS_COMPILE_COMPAT_VDSO:"%"=%) | |
52 | ||
53 | ifeq ($(CONFIG_CC_IS_CLANG), y) | |
54 | $(warning CROSS_COMPILE_COMPAT is clang, the compat vDSO will not be built) | |
a22c5cf5 | 55 | else ifeq ($(strip $(CROSS_COMPILE_COMPAT)),) |
bfe801eb VF |
56 | $(warning CROSS_COMPILE_COMPAT not defined or empty, the compat vDSO will not be built) |
57 | else ifeq ($(shell which $(CROSS_COMPILE_COMPAT)gcc 2> /dev/null),) | |
58 | $(error $(CROSS_COMPILE_COMPAT)gcc not found, check CROSS_COMPILE_COMPAT) | |
59 | else | |
60 | export CROSS_COMPILE_COMPAT | |
61 | export CONFIG_COMPAT_VDSO := y | |
62 | compat_vdso := -DCONFIG_COMPAT_VDSO=1 | |
63 | endif | |
64 | endif | |
65 | ||
66 | KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst) $(compat_vdso) | |
728dabd6 | 67 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables |
fa63da2a | 68 | KBUILD_CFLAGS += $(call cc-disable-warning, psabi) |
bfe801eb | 69 | KBUILD_AFLAGS += $(lseinstr) $(brokengasinst) $(compat_vdso) |
c09d6a04 | 70 | |
3d6a7b99 AP |
71 | KBUILD_CFLAGS += $(call cc-option,-mabi=lp64) |
72 | KBUILD_AFLAGS += $(call cc-option,-mabi=lp64) | |
73 | ||
0a1213fa AB |
74 | ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) |
75 | prepare: stack_protector_prepare | |
76 | stack_protector_prepare: prepare0 | |
77 | $(eval KBUILD_CFLAGS += -mstack-protector-guard=sysreg \ | |
78 | -mstack-protector-guard-reg=sp_el0 \ | |
79 | -mstack-protector-guard-offset=$(shell \ | |
80 | awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \ | |
81 | include/generated/asm-offsets.h)) | |
82 | endif | |
83 | ||
a0974e6e WD |
84 | ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) |
85 | KBUILD_CPPFLAGS += -mbig-endian | |
bcde519e | 86 | CHECKFLAGS += -D__AARCH64EB__ |
a0974e6e | 87 | AS += -EB |
c931d34e OJ |
88 | # Prefer the baremetal ELF build target, but not all toolchains include |
89 | # it so fall back to the standard linux version if needed. | |
d503ac53 | 90 | KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb) |
cfa88c79 | 91 | UTS_MACHINE := aarch64_be |
a0974e6e | 92 | else |
8c2c3df3 | 93 | KBUILD_CPPFLAGS += -mlittle-endian |
bcde519e | 94 | CHECKFLAGS += -D__AARCH64EL__ |
8c2c3df3 | 95 | AS += -EL |
c931d34e | 96 | # Same as above, prefer ELF but fall back to linux target if needed. |
d503ac53 | 97 | KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux) |
cfa88c79 | 98 | UTS_MACHINE := aarch64 |
a0974e6e | 99 | endif |
8c2c3df3 | 100 | |
1f2f01b1 | 101 | CHECKFLAGS += -D__aarch64__ |
8c2c3df3 | 102 | |
fd045f6c | 103 | ifeq ($(CONFIG_ARM64_MODULE_PLTS),y) |
10df0638 | 104 | KBUILD_LDS_MODULE += $(srctree)/arch/arm64/kernel/module.lds |
fd045f6c AB |
105 | endif |
106 | ||
8c2c3df3 CM |
107 | # Default value |
108 | head-y := arch/arm64/kernel/head.o | |
109 | ||
110 | # The byte offset of the kernel image in RAM from the start of RAM. | |
da57a369 | 111 | ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y) |
aed7eb83 MR |
112 | TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \ |
113 | int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \ | |
114 | rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}") | |
da57a369 | 115 | else |
8c2c3df3 | 116 | TEXT_OFFSET := 0x00080000 |
da57a369 | 117 | endif |
8c2c3df3 | 118 | |
b2f557ea AK |
119 | ifeq ($(CONFIG_KASAN_SW_TAGS), y) |
120 | KASAN_SHADOW_SCALE_SHIFT := 4 | |
121 | else | |
122 | KASAN_SHADOW_SCALE_SHIFT := 3 | |
123 | endif | |
124 | ||
125 | KBUILD_CFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) | |
126 | KBUILD_CPPFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) | |
127 | KBUILD_AFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) | |
128 | ||
9597e743 AK |
129 | # KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - KASAN_SHADOW_SCALE_SHIFT)) |
130 | # - (1 << (64 - KASAN_SHADOW_SCALE_SHIFT)) | |
39d114dd AR |
131 | # in 32-bit arithmetic |
132 | KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \ | |
9597e743 AK |
133 | (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \ |
134 | + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - $(KASAN_SHADOW_SCALE_SHIFT))) \ | |
135 | - (1 << (64 - 32 - $(KASAN_SHADOW_SCALE_SHIFT))) )) ) | |
39d114dd | 136 | |
8c2c3df3 CM |
137 | export TEXT_OFFSET GZFLAGS |
138 | ||
139 | core-y += arch/arm64/kernel/ arch/arm64/mm/ | |
e54bcde3 | 140 | core-$(CONFIG_NET) += arch/arm64/net/ |
6211753f | 141 | core-$(CONFIG_KVM) += arch/arm64/kvm/ |
63917f0b | 142 | core-$(CONFIG_XEN) += arch/arm64/xen/ |
2c98833a | 143 | core-$(CONFIG_CRYPTO) += arch/arm64/crypto/ |
8c2c3df3 | 144 | libs-y := arch/arm64/lib/ $(libs-y) |
ad08fd49 | 145 | core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a |
8c2c3df3 CM |
146 | |
147 | # Default target when executing plain make | |
06995804 MM |
148 | boot := arch/arm64/boot |
149 | KBUILD_IMAGE := $(boot)/Image.gz | |
8c2c3df3 | 150 | |
37c8a5fa | 151 | all: Image.gz |
8c2c3df3 | 152 | |
8c2c3df3 | 153 | |
0723c05f OJ |
154 | Image: vmlinux |
155 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ | |
156 | ||
9ca4e58c | 157 | Image.%: Image |
70f915a2 | 158 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
8c2c3df3 | 159 | |
8684fa3e | 160 | zinstall install: |
70f915a2 | 161 | $(Q)$(MAKE) $(build)=$(boot) $@ |
8c2c3df3 | 162 | |
3c01742a KM |
163 | PHONY += vdso_install |
164 | vdso_install: | |
165 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ | |
166 | ||
8c2c3df3 CM |
167 | # We use MRPROPER_FILES and CLEAN_FILES now |
168 | archclean: | |
169 | $(Q)$(MAKE) $(clean)=$(boot) | |
170 | ||
98356eb0 | 171 | ifeq ($(KBUILD_EXTMOD),) |
a66649da KB |
172 | # We need to generate vdso-offsets.h before compiling certain files in kernel/. |
173 | # In order to do that, we should use the archprepare target, but we can't since | |
174 | # asm-offsets.h is included in some files used to generate vdso-offsets.h, and | |
175 | # asm-offsets.h is built in prepare0, for which archprepare is a dependency. | |
176 | # Therefore we need to generate the header after prepare0 has been made, hence | |
177 | # this hack. | |
178 | prepare: vdso_prepare | |
179 | vdso_prepare: prepare0 | |
180 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h | |
bfe801eb VF |
181 | $(if $(CONFIG_COMPAT_VDSO),$(Q)$(MAKE) \ |
182 | $(build)=arch/arm64/kernel/vdso32 \ | |
183 | include/generated/vdso32-offsets.h) | |
98356eb0 | 184 | endif |
a66649da | 185 | |
8c2c3df3 CM |
186 | define archhelp |
187 | echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)' | |
188 | echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' | |
189 | echo ' install - Install uncompressed kernel' | |
190 | echo ' zinstall - Install compressed kernel' | |
191 | echo ' Install using (your) ~/bin/installkernel or' | |
192 | echo ' (distribution) /sbin/installkernel or' | |
193 | echo ' install to $$(INSTALL_PATH) and run lilo' | |
194 | endef |