Commit | Line | Data |
---|---|---|
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 | ||
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 | ||
bfe801eb VF |
56 | ifeq ($(CONFIG_GENERIC_COMPAT_VDSO), y) |
57 | CROSS_COMPILE_COMPAT ?= $(CONFIG_CROSS_COMPILE_COMPAT_VDSO:"%"=%) | |
58 | ||
59 | ifeq ($(CONFIG_CC_IS_CLANG), y) | |
60 | $(warning CROSS_COMPILE_COMPAT is clang, the compat vDSO will not be built) | |
a22c5cf5 | 61 | else ifeq ($(strip $(CROSS_COMPILE_COMPAT)),) |
bfe801eb VF |
62 | $(warning CROSS_COMPILE_COMPAT not defined or empty, the compat vDSO will not be built) |
63 | else ifeq ($(shell which $(CROSS_COMPILE_COMPAT)gcc 2> /dev/null),) | |
64 | $(error $(CROSS_COMPILE_COMPAT)gcc not found, check CROSS_COMPILE_COMPAT) | |
65 | else | |
66 | export CROSS_COMPILE_COMPAT | |
67 | export CONFIG_COMPAT_VDSO := y | |
68 | compat_vdso := -DCONFIG_COMPAT_VDSO=1 | |
69 | endif | |
70 | endif | |
71 | ||
03adcbd9 WD |
72 | KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst) \ |
73 | $(compat_vdso) $(cc_has_k_constraint) | |
728dabd6 | 74 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables |
fa63da2a | 75 | KBUILD_CFLAGS += $(call cc-disable-warning, psabi) |
bfe801eb | 76 | KBUILD_AFLAGS += $(lseinstr) $(brokengasinst) $(compat_vdso) |
c09d6a04 | 77 | |
3d6a7b99 AP |
78 | KBUILD_CFLAGS += $(call cc-option,-mabi=lp64) |
79 | KBUILD_AFLAGS += $(call cc-option,-mabi=lp64) | |
80 | ||
0a1213fa AB |
81 | ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) |
82 | prepare: stack_protector_prepare | |
83 | stack_protector_prepare: prepare0 | |
84 | $(eval KBUILD_CFLAGS += -mstack-protector-guard=sysreg \ | |
85 | -mstack-protector-guard-reg=sp_el0 \ | |
86 | -mstack-protector-guard-offset=$(shell \ | |
87 | awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \ | |
88 | include/generated/asm-offsets.h)) | |
89 | endif | |
90 | ||
a0974e6e WD |
91 | ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) |
92 | KBUILD_CPPFLAGS += -mbig-endian | |
bcde519e | 93 | CHECKFLAGS += -D__AARCH64EB__ |
a0974e6e | 94 | AS += -EB |
c931d34e OJ |
95 | # Prefer the baremetal ELF build target, but not all toolchains include |
96 | # it so fall back to the standard linux version if needed. | |
d503ac53 | 97 | KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb) |
cfa88c79 | 98 | UTS_MACHINE := aarch64_be |
a0974e6e | 99 | else |
8c2c3df3 | 100 | KBUILD_CPPFLAGS += -mlittle-endian |
bcde519e | 101 | CHECKFLAGS += -D__AARCH64EL__ |
8c2c3df3 | 102 | AS += -EL |
c931d34e | 103 | # Same as above, prefer ELF but fall back to linux target if needed. |
d503ac53 | 104 | KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux) |
cfa88c79 | 105 | UTS_MACHINE := aarch64 |
a0974e6e | 106 | endif |
8c2c3df3 | 107 | |
1f2f01b1 | 108 | CHECKFLAGS += -D__aarch64__ |
8c2c3df3 | 109 | |
fd045f6c | 110 | ifeq ($(CONFIG_ARM64_MODULE_PLTS),y) |
10df0638 | 111 | KBUILD_LDS_MODULE += $(srctree)/arch/arm64/kernel/module.lds |
fd045f6c AB |
112 | endif |
113 | ||
8c2c3df3 CM |
114 | # Default value |
115 | head-y := arch/arm64/kernel/head.o | |
116 | ||
117 | # The byte offset of the kernel image in RAM from the start of RAM. | |
da57a369 | 118 | ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y) |
aed7eb83 MR |
119 | TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \ |
120 | int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \ | |
121 | rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}") | |
da57a369 | 122 | else |
8c2c3df3 | 123 | TEXT_OFFSET := 0x00080000 |
da57a369 | 124 | endif |
8c2c3df3 | 125 | |
b2f557ea AK |
126 | ifeq ($(CONFIG_KASAN_SW_TAGS), y) |
127 | KASAN_SHADOW_SCALE_SHIFT := 4 | |
128 | else | |
129 | KASAN_SHADOW_SCALE_SHIFT := 3 | |
130 | endif | |
131 | ||
132 | KBUILD_CFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) | |
133 | KBUILD_CPPFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) | |
134 | KBUILD_AFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) | |
135 | ||
8c2c3df3 CM |
136 | export TEXT_OFFSET GZFLAGS |
137 | ||
6bfa3134 | 138 | core-y += arch/arm64/ |
8c2c3df3 | 139 | libs-y := arch/arm64/lib/ $(libs-y) |
ad08fd49 | 140 | core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a |
8c2c3df3 CM |
141 | |
142 | # Default target when executing plain make | |
06995804 MM |
143 | boot := arch/arm64/boot |
144 | KBUILD_IMAGE := $(boot)/Image.gz | |
8c2c3df3 | 145 | |
37c8a5fa | 146 | all: Image.gz |
8c2c3df3 | 147 | |
8c2c3df3 | 148 | |
0723c05f OJ |
149 | Image: vmlinux |
150 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ | |
151 | ||
9ca4e58c | 152 | Image.%: Image |
70f915a2 | 153 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
8c2c3df3 | 154 | |
8684fa3e | 155 | zinstall install: |
70f915a2 | 156 | $(Q)$(MAKE) $(build)=$(boot) $@ |
8c2c3df3 | 157 | |
3c01742a KM |
158 | PHONY += vdso_install |
159 | vdso_install: | |
160 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ | |
161 | ||
8c2c3df3 CM |
162 | # We use MRPROPER_FILES and CLEAN_FILES now |
163 | archclean: | |
164 | $(Q)$(MAKE) $(clean)=$(boot) | |
165 | ||
98356eb0 | 166 | ifeq ($(KBUILD_EXTMOD),) |
a66649da KB |
167 | # We need to generate vdso-offsets.h before compiling certain files in kernel/. |
168 | # In order to do that, we should use the archprepare target, but we can't since | |
169 | # asm-offsets.h is included in some files used to generate vdso-offsets.h, and | |
170 | # asm-offsets.h is built in prepare0, for which archprepare is a dependency. | |
171 | # Therefore we need to generate the header after prepare0 has been made, hence | |
172 | # this hack. | |
173 | prepare: vdso_prepare | |
174 | vdso_prepare: prepare0 | |
175 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h | |
bfe801eb VF |
176 | $(if $(CONFIG_COMPAT_VDSO),$(Q)$(MAKE) \ |
177 | $(build)=arch/arm64/kernel/vdso32 \ | |
178 | include/generated/vdso32-offsets.h) | |
98356eb0 | 179 | endif |
a66649da | 180 | |
8c2c3df3 CM |
181 | define archhelp |
182 | echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)' | |
183 | echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' | |
184 | echo ' install - Install uncompressed kernel' | |
185 | echo ' zinstall - Install compressed kernel' | |
186 | echo ' Install using (your) ~/bin/installkernel or' | |
187 | echo ' (distribution) /sbin/installkernel or' | |
188 | echo ' install to $$(INSTALL_PATH) and run lilo' | |
189 | endef |