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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 | ||
517e28b4 | 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. | |
66d1e041 | 21 | LDFLAGS_vmlinux += -shared -Bsymbolic -z notext \ |
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 | ||
03adcbd9 WD |
42 | cc_has_k_constraint := $(call try-run,echo \ |
43 | 'int main(void) { \ | |
44 | asm volatile("and w0, w0, %w0" :: "K" (4294967295)); \ | |
45 | return 0; \ | |
46 | }' | $(CC) -S -x c -o "$$TMP" -,,-DCONFIG_CC_HAS_K_CONSTRAINT=1) | |
47 | ||
d91750f1 | 48 | ifeq ($(CONFIG_ARM64), y) |
bbb56c27 MZ |
49 | brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1) |
50 | ||
d91750f1 | 51 | ifneq ($(brokengasinst),) |
bbb56c27 | 52 | $(warning Detected assembler with broken .inst; disassembly will be unreliable) |
d91750f1 | 53 | endif |
bbb56c27 MZ |
54 | endif |
55 | ||
03adcbd9 WD |
56 | KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst) \ |
57 | $(compat_vdso) $(cc_has_k_constraint) | |
728dabd6 | 58 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables |
fa63da2a | 59 | KBUILD_CFLAGS += $(call cc-disable-warning, psabi) |
bfe801eb | 60 | KBUILD_AFLAGS += $(lseinstr) $(brokengasinst) $(compat_vdso) |
c09d6a04 | 61 | |
3d6a7b99 AP |
62 | KBUILD_CFLAGS += $(call cc-option,-mabi=lp64) |
63 | KBUILD_AFLAGS += $(call cc-option,-mabi=lp64) | |
64 | ||
0a1213fa AB |
65 | ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) |
66 | prepare: stack_protector_prepare | |
67 | stack_protector_prepare: prepare0 | |
68 | $(eval KBUILD_CFLAGS += -mstack-protector-guard=sysreg \ | |
69 | -mstack-protector-guard-reg=sp_el0 \ | |
70 | -mstack-protector-guard-offset=$(shell \ | |
71 | awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \ | |
72 | include/generated/asm-offsets.h)) | |
73 | endif | |
74 | ||
19a39587 MB |
75 | # Ensure that if the compiler supports branch protection we default it |
76 | # off. | |
77 | KBUILD_CFLAGS += $(call cc-option,-mbranch-protection=none) | |
78 | ||
a0974e6e WD |
79 | ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) |
80 | KBUILD_CPPFLAGS += -mbig-endian | |
bcde519e | 81 | CHECKFLAGS += -D__AARCH64EB__ |
a0974e6e | 82 | AS += -EB |
c931d34e OJ |
83 | # Prefer the baremetal ELF build target, but not all toolchains include |
84 | # it so fall back to the standard linux version if needed. | |
517e28b4 | 85 | KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb -z norelro) |
cfa88c79 | 86 | UTS_MACHINE := aarch64_be |
a0974e6e | 87 | else |
8c2c3df3 | 88 | KBUILD_CPPFLAGS += -mlittle-endian |
bcde519e | 89 | CHECKFLAGS += -D__AARCH64EL__ |
8c2c3df3 | 90 | AS += -EL |
c931d34e | 91 | # Same as above, prefer ELF but fall back to linux target if needed. |
517e28b4 | 92 | KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux -z norelro) |
cfa88c79 | 93 | UTS_MACHINE := aarch64 |
a0974e6e | 94 | endif |
8c2c3df3 | 95 | |
517e28b4 ND |
96 | ifeq ($(CONFIG_LD_IS_LLD), y) |
97 | KBUILD_LDFLAGS += -z norelro | |
98 | endif | |
99 | ||
1f2f01b1 | 100 | CHECKFLAGS += -D__aarch64__ |
8c2c3df3 | 101 | |
fd045f6c | 102 | ifeq ($(CONFIG_ARM64_MODULE_PLTS),y) |
10df0638 | 103 | KBUILD_LDS_MODULE += $(srctree)/arch/arm64/kernel/module.lds |
fd045f6c AB |
104 | endif |
105 | ||
8c2c3df3 CM |
106 | # Default value |
107 | head-y := arch/arm64/kernel/head.o | |
108 | ||
109 | # The byte offset of the kernel image in RAM from the start of RAM. | |
da57a369 | 110 | ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y) |
aed7eb83 MR |
111 | TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \ |
112 | int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \ | |
113 | rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}") | |
da57a369 | 114 | else |
8c2c3df3 | 115 | TEXT_OFFSET := 0x00080000 |
da57a369 | 116 | endif |
8c2c3df3 | 117 | |
b2f557ea AK |
118 | ifeq ($(CONFIG_KASAN_SW_TAGS), y) |
119 | KASAN_SHADOW_SCALE_SHIFT := 4 | |
120 | else | |
121 | KASAN_SHADOW_SCALE_SHIFT := 3 | |
122 | endif | |
123 | ||
124 | KBUILD_CFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) | |
125 | KBUILD_CPPFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) | |
126 | KBUILD_AFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) | |
127 | ||
8c2c3df3 CM |
128 | export TEXT_OFFSET GZFLAGS |
129 | ||
6bfa3134 | 130 | core-y += arch/arm64/ |
8c2c3df3 | 131 | libs-y := arch/arm64/lib/ $(libs-y) |
ad08fd49 | 132 | core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a |
8c2c3df3 CM |
133 | |
134 | # Default target when executing plain make | |
06995804 MM |
135 | boot := arch/arm64/boot |
136 | KBUILD_IMAGE := $(boot)/Image.gz | |
8c2c3df3 | 137 | |
37c8a5fa | 138 | all: Image.gz |
8c2c3df3 | 139 | |
8c2c3df3 | 140 | |
0723c05f OJ |
141 | Image: vmlinux |
142 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ | |
143 | ||
9ca4e58c | 144 | Image.%: Image |
70f915a2 | 145 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
8c2c3df3 | 146 | |
8684fa3e | 147 | zinstall install: |
70f915a2 | 148 | $(Q)$(MAKE) $(build)=$(boot) $@ |
8c2c3df3 | 149 | |
3c01742a KM |
150 | PHONY += vdso_install |
151 | vdso_install: | |
152 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ | |
d6b0047a FL |
153 | $(if $(CONFIG_COMPAT_VDSO), \ |
154 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 $@) | |
3c01742a | 155 | |
8c2c3df3 CM |
156 | # We use MRPROPER_FILES and CLEAN_FILES now |
157 | archclean: | |
158 | $(Q)$(MAKE) $(clean)=$(boot) | |
159 | ||
98356eb0 | 160 | ifeq ($(KBUILD_EXTMOD),) |
a66649da KB |
161 | # We need to generate vdso-offsets.h before compiling certain files in kernel/. |
162 | # In order to do that, we should use the archprepare target, but we can't since | |
163 | # asm-offsets.h is included in some files used to generate vdso-offsets.h, and | |
164 | # asm-offsets.h is built in prepare0, for which archprepare is a dependency. | |
165 | # Therefore we need to generate the header after prepare0 has been made, hence | |
166 | # this hack. | |
167 | prepare: vdso_prepare | |
168 | vdso_prepare: prepare0 | |
169 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h | |
bfe801eb VF |
170 | $(if $(CONFIG_COMPAT_VDSO),$(Q)$(MAKE) \ |
171 | $(build)=arch/arm64/kernel/vdso32 \ | |
172 | include/generated/vdso32-offsets.h) | |
98356eb0 | 173 | endif |
a66649da | 174 | |
8c2c3df3 CM |
175 | define archhelp |
176 | echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)' | |
177 | echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' | |
178 | echo ' install - Install uncompressed kernel' | |
179 | echo ' zinstall - Install compressed kernel' | |
180 | echo ' Install using (your) ~/bin/installkernel or' | |
181 | echo ' (distribution) /sbin/installkernel or' | |
182 | echo ' install to $$(INSTALL_PATH) and run lilo' | |
183 | endef |