1 #
2 # arch/arm64/Makefile
3 #
4 # This file is included by the global makefile
5 # architecture-specific flags and dependencies
6 #
7 # This file is subject to the terms and condit
8 # License. See the file "COPYING" in the main
9 # for more details.
10 #
11 # Copyright (C) 1995-2001 by Russell King
12
13 LDFLAGS_vmlinux :=--no-undefined -X --pic-vene
14
15 ifeq ($(CONFIG_RELOCATABLE), y)
16 # Pass --no-apply-dynamic-relocs to restore pr
17 # for relative relocs, since this leads to bet
18 # with the relocation offsets always being zer
19 LDFLAGS_vmlinux += -shared -Bsymbolic
20 $(call ld-option, --no
21 endif
22
23 ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
24 ifeq ($(CONFIG_ARM64_LD_HAS_FIX_ERRATUM_8434
25 LDFLAGS_vmlinux += --fix-cortex-a53-843419
26 endif
27 endif
28
29 cc_has_k_constraint := $(call try-run,echo
30 'int main(void) {
31 asm volatile("and w0, w0, %w0"
32 return 0;
33 }' | $(CC) -S -x c -o "$$TMP" -,,-DCON
34
35 ifeq ($(CONFIG_BROKEN_GAS_INST),y)
36 $(warning Detected assembler with broken .inst
37 endif
38
39 # The GCC option -ffreestanding is required in
40 # ARM/NEON intrinsics in a non C99-compliant e
41 CC_FLAGS_FPU := -ffreestanding
42 # Enable <arm_neon.h>
43 CC_FLAGS_FPU += -isystem $(shell $(CC) -pri
44 CC_FLAGS_NO_FPU := -mgeneral-regs-only
45
46 KBUILD_CFLAGS += $(CC_FLAGS_NO_FPU) \
47 $(compat_vdso) $(cc_has_k_c
48 KBUILD_CFLAGS += $(call cc-disable-warning,
49 KBUILD_AFLAGS += $(compat_vdso)
50
51 KBUILD_RUSTFLAGS += --target=aarch64-unknown-n
52
53 KBUILD_CFLAGS += $(call cc-option,-mabi=lp64
54 KBUILD_AFLAGS += $(call cc-option,-mabi=lp64
55
56 # Avoid generating .eh_frame* sections.
57 ifneq ($(CONFIG_UNWIND_TABLES),y)
58 KBUILD_CFLAGS += -fno-asynchronous-unwind-ta
59 KBUILD_AFLAGS += -fno-asynchronous-unwind-ta
60 KBUILD_RUSTFLAGS += -Cforce-unwind-tables=n
61 else
62 KBUILD_CFLAGS += -fasynchronous-unwind-table
63 KBUILD_AFLAGS += -fasynchronous-unwind-table
64 KBUILD_RUSTFLAGS += -Cforce-unwind-tables=y -Z
65 endif
66
67 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
68 prepare: stack_protector_prepare
69 stack_protector_prepare: prepare0
70 $(eval KBUILD_CFLAGS += -mstack-protec
71 -mstack-protec
72 -mstack-protec
73 awk '{if ($$2 == "TSK_
74 includ
75 endif
76
77 ifeq ($(CONFIG_ARM64_BTI_KERNEL),y)
78 KBUILD_CFLAGS += -mbranch-protection=pac-ret
79 KBUILD_RUSTFLAGS += -Zbranch-protection=bti,
80 else ifeq ($(CONFIG_ARM64_PTR_AUTH_KERNEL),y)
81 KBUILD_RUSTFLAGS += -Zbranch-protection=pac-
82 ifeq ($(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET),y
83 KBUILD_CFLAGS += -mbranch-protection=pac-r
84 else
85 KBUILD_CFLAGS += -msign-return-address=non
86 endif
87 else
88 KBUILD_CFLAGS += $(call cc-option,-mbranch-p
89 endif
90
91 # Tell the assembler to support instructions f
92 # architecture.
93 #
94 # For non-integrated assemblers we'll pass thi
95 # integrated assemblers we'll define ARM64_ASM
96 # inline usage.
97 #
98 # We cannot pass the same arch flag to the com
99 # freely generate instructions which are not s
100 # versions, which would prevent a single kerne
101 # hardware.
102 ifeq ($(CONFIG_AS_HAS_ARMV8_5), y)
103 asm-arch := armv8.5-a
104 else ifeq ($(CONFIG_AS_HAS_ARMV8_4), y)
105 asm-arch := armv8.4-a
106 else ifeq ($(CONFIG_AS_HAS_ARMV8_3), y)
107 asm-arch := armv8.3-a
108 else ifeq ($(CONFIG_AS_HAS_ARMV8_2), y)
109 asm-arch := armv8.2-a
110 endif
111
112 ifdef asm-arch
113 KBUILD_CFLAGS += -Wa,-march=$(asm-arch) \
114 -DARM64_ASM_ARCH='"$(asm-ar
115 endif
116
117 ifeq ($(CONFIG_SHADOW_CALL_STACK), y)
118 KBUILD_CFLAGS += -ffixed-x18
119 KBUILD_RUSTFLAGS += -Zfixed-x18
120 endif
121
122 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
123 KBUILD_CPPFLAGS += -mbig-endian
124 CHECKFLAGS += -D__AARCH64EB__
125 # Prefer the baremetal ELF build target, but n
126 # it so fall back to the standard linux versio
127 KBUILD_LDFLAGS += -EB $(call ld-option, -maar
128 UTS_MACHINE := aarch64_be
129 else
130 KBUILD_CPPFLAGS += -mlittle-endian
131 CHECKFLAGS += -D__AARCH64EL__
132 # Same as above, prefer ELF but fall back to l
133 KBUILD_LDFLAGS += -EL $(call ld-option, -maar
134 UTS_MACHINE := aarch64
135 endif
136
137 ifeq ($(CONFIG_LD_IS_LLD), y)
138 KBUILD_LDFLAGS += -z norelro
139 endif
140
141 CHECKFLAGS += -D__aarch64__
142
143 ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS),y
144 KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNC
145 CC_FLAGS_FTRACE := -fpatchable-function-entr
146 else ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_ARGS),
147 KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNC
148 CC_FLAGS_FTRACE := -fpatchable-function-entr
149 endif
150
151 ifeq ($(CONFIG_KASAN_SW_TAGS), y)
152 KASAN_SHADOW_SCALE_SHIFT := 4
153 else ifeq ($(CONFIG_KASAN_GENERIC), y)
154 KASAN_SHADOW_SCALE_SHIFT := 3
155 endif
156
157 KBUILD_CFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(
158 KBUILD_CPPFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=
159 KBUILD_AFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(
160
161 libs-y := arch/arm64/lib/ $(libs-y)
162 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/
163
164 # Default target when executing plain make
165 boot := arch/arm64/boot
166
167 BOOT_TARGETS := Image vmlinuz.efi image.fit
168
169 PHONY += $(BOOT_TARGETS)
170
171 ifeq ($(CONFIG_EFI_ZBOOT),)
172 KBUILD_IMAGE := $(boot)/Image.gz
173 else
174 KBUILD_IMAGE := $(boot)/vmlinuz.efi
175 endif
176
177 all: $(notdir $(KBUILD_IMAGE))
178
179 image.fit: dtbs
180
181 vmlinuz.efi image.fit: Image
182 $(BOOT_TARGETS): vmlinux
183 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$
184
185 Image.%: Image
186 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$
187
188 ifeq ($(CONFIG_COMPRESSED_INSTALL),y)
189 DEFAULT_KBUILD_IMAGE = $(KBUILD_IMAGE)
190 else
191 DEFAULT_KBUILD_IMAGE = $(boot)/Image
192 endif
193
194 install: KBUILD_IMAGE := $(DEFAULT_KBUILD_IMAG
195 install zinstall:
196 $(call cmd,install)
197
198 archprepare:
199 $(Q)$(MAKE) $(build)=arch/arm64/tools
200 ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
201 ifneq ($(CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843
202 @echo "warning: ld does not support --
203 endif
204 endif
205 ifeq ($(CONFIG_ARM64_USE_LSE_ATOMICS),y)
206 ifneq ($(CONFIG_ARM64_LSE_ATOMICS),y)
207 @echo "warning: LSE atomics not suppor
208 endif
209 endif
210
211 ifeq ($(KBUILD_EXTMOD),)
212 # We need to generate vdso-offsets.h before co
213 # In order to do that, we should use the archp
214 # asm-offsets.h is included in some files used
215 # asm-offsets.h is built in prepare0, for whic
216 # Therefore we need to generate the header aft
217 # this hack.
218 prepare: vdso_prepare
219 vdso_prepare: prepare0
220 $(Q)$(MAKE) $(build)=arch/arm64/kernel
221 include/generated/vdso-offsets.h arch/
222 ifdef CONFIG_COMPAT_VDSO
223 $(Q)$(MAKE) $(build)=arch/arm64/kernel
224 arch/arm64/kernel/vdso32/vdso.so
225 endif
226 endif
227
228 vdso-install-y += arc
229 vdso-install-$(CONFIG_COMPAT_VDSO) += arc
230
231 include $(srctree)/scripts/Makefile.defconf
232
233 PHONY += virtconfig
234 virtconfig:
235 $(call merge_into_defconfig_override,d
236
237 define archhelp
238 echo '* Image.gz - Compressed kernel i
239 echo ' Image - Uncompressed kernel
240 echo ' image.fit - Flat Image Tree (ar
241 echo ' install - Install kernel (com
242 echo ' zinstall - Install compressed
243 echo ' Install using (your
244 echo ' (distribution) /sbi
245 echo ' install to $$(INSTA
246 endef
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