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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 | ||
311bea3c | 13 | LDFLAGS_vmlinux :=--no-undefined -X |
8c2c3df3 | 14 | |
fd9dde6a ND |
15 | ifeq ($(CONFIG_RELOCATABLE), y) |
16 | # Pass --no-apply-dynamic-relocs to restore pre-binutils-2.27 behaviour | |
17 | # for relative relocs, since this leads to better Image compression | |
18 | # with the relocation offsets always being zero. | |
3b92fa74 | 19 | LDFLAGS_vmlinux += -shared -Bsymbolic -z notext \ |
fd9dde6a | 20 | $(call ld-option, --no-apply-dynamic-relocs) |
1e48ef7f AB |
21 | endif |
22 | ||
6ffe9923 | 23 | ifeq ($(CONFIG_ARM64_ERRATUM_843419),y) |
64ee84c7 | 24 | ifeq ($(CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843419),y) |
6ffe9923 WD |
25 | LDFLAGS_vmlinux += --fix-cortex-a53-843419 |
26 | endif | |
27 | endif | |
28 | ||
03adcbd9 WD |
29 | cc_has_k_constraint := $(call try-run,echo \ |
30 | 'int main(void) { \ | |
31 | asm volatile("and w0, w0, %w0" :: "K" (4294967295)); \ | |
32 | return 0; \ | |
33 | }' | $(CC) -S -x c -o "$$TMP" -,,-DCONFIG_CC_HAS_K_CONSTRAINT=1) | |
34 | ||
8bf9284d | 35 | ifeq ($(CONFIG_BROKEN_GAS_INST),y) |
bbb56c27 MZ |
36 | $(warning Detected assembler with broken .inst; disassembly will be unreliable) |
37 | endif | |
38 | ||
8bf9284d | 39 | KBUILD_CFLAGS += -mgeneral-regs-only \ |
03adcbd9 | 40 | $(compat_vdso) $(cc_has_k_constraint) |
fa63da2a | 41 | KBUILD_CFLAGS += $(call cc-disable-warning, psabi) |
8bf9284d | 42 | KBUILD_AFLAGS += $(compat_vdso) |
c09d6a04 | 43 | |
3d6a7b99 AP |
44 | KBUILD_CFLAGS += $(call cc-option,-mabi=lp64) |
45 | KBUILD_AFLAGS += $(call cc-option,-mabi=lp64) | |
46 | ||
6e0a66d1 KC |
47 | # Avoid generating .eh_frame* sections. |
48 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables | |
49 | KBUILD_AFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables | |
50 | ||
0a1213fa AB |
51 | ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) |
52 | prepare: stack_protector_prepare | |
53 | stack_protector_prepare: prepare0 | |
54 | $(eval KBUILD_CFLAGS += -mstack-protector-guard=sysreg \ | |
55 | -mstack-protector-guard-reg=sp_el0 \ | |
56 | -mstack-protector-guard-offset=$(shell \ | |
57 | awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \ | |
58 | include/generated/asm-offsets.h)) | |
59 | endif | |
60 | ||
2c54b423 AB |
61 | ifeq ($(CONFIG_AS_HAS_ARMV8_2), y) |
62 | # make sure to pass the newest target architecture to -march. | |
63 | asm-arch := armv8.2-a | |
64 | endif | |
65 | ||
b8fdef31 MB |
66 | # Ensure that if the compiler supports branch protection we default it |
67 | # off, this will be overridden if we are using branch protection. | |
68 | branch-prot-flags-y += $(call cc-option,-mbranch-protection=none) | |
69 | ||
b27a9f41 | 70 | ifeq ($(CONFIG_ARM64_PTR_AUTH_KERNEL),y) |
74afda40 | 71 | branch-prot-flags-$(CONFIG_CC_HAS_SIGN_RETURN_ADDRESS) := -msign-return-address=all |
717b938e MB |
72 | # We enable additional protection for leaf functions as there is some |
73 | # narrow potential for ROP protection benefits and no substantial | |
74 | # performance impact has been observed. | |
92e2294d MB |
75 | ifeq ($(CONFIG_ARM64_BTI_KERNEL),y) |
76 | branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET_BTI) := -mbranch-protection=pac-ret+leaf+bti | |
77 | else | |
74afda40 | 78 | branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET) := -mbranch-protection=pac-ret+leaf |
92e2294d | 79 | endif |
74afda40 KM |
80 | # -march=armv8.3-a enables the non-nops instructions for PAC, to avoid the |
81 | # compiler to generate them and consequently to break the single image contract | |
82 | # we pass it only to the assembler. This option is utilized only in case of non | |
83 | # integrated assemblers. | |
1764c3ed ST |
84 | ifeq ($(CONFIG_AS_HAS_PAC), y) |
85 | asm-arch := armv8.3-a | |
74afda40 | 86 | endif |
7c78f67e | 87 | endif |
74afda40 | 88 | |
b8fdef31 MB |
89 | KBUILD_CFLAGS += $(branch-prot-flags-y) |
90 | ||
7c78f67e ZY |
91 | ifeq ($(CONFIG_AS_HAS_ARMV8_4), y) |
92 | # make sure to pass the newest target architecture to -march. | |
1764c3ed ST |
93 | asm-arch := armv8.4-a |
94 | endif | |
95 | ||
f469c032 VF |
96 | ifeq ($(CONFIG_AS_HAS_ARMV8_5), y) |
97 | # make sure to pass the newest target architecture to -march. | |
98 | asm-arch := armv8.5-a | |
99 | endif | |
100 | ||
1764c3ed ST |
101 | ifdef asm-arch |
102 | KBUILD_CFLAGS += -Wa,-march=$(asm-arch) \ | |
103 | -DARM64_ASM_ARCH='"$(asm-arch)"' | |
7c78f67e ZY |
104 | endif |
105 | ||
da64e9d1 ST |
106 | ifeq ($(CONFIG_SHADOW_CALL_STACK), y) |
107 | KBUILD_CFLAGS += -ffixed-x18 | |
108 | endif | |
109 | ||
a0974e6e WD |
110 | ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) |
111 | KBUILD_CPPFLAGS += -mbig-endian | |
bcde519e | 112 | CHECKFLAGS += -D__AARCH64EB__ |
c931d34e OJ |
113 | # Prefer the baremetal ELF build target, but not all toolchains include |
114 | # it so fall back to the standard linux version if needed. | |
311bea3c | 115 | KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb -z norelro) |
cfa88c79 | 116 | UTS_MACHINE := aarch64_be |
a0974e6e | 117 | else |
8c2c3df3 | 118 | KBUILD_CPPFLAGS += -mlittle-endian |
bcde519e | 119 | CHECKFLAGS += -D__AARCH64EL__ |
c931d34e | 120 | # Same as above, prefer ELF but fall back to linux target if needed. |
311bea3c | 121 | KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux -z norelro) |
cfa88c79 | 122 | UTS_MACHINE := aarch64 |
a0974e6e | 123 | endif |
8c2c3df3 | 124 | |
311bea3c ND |
125 | ifeq ($(CONFIG_LD_IS_LLD), y) |
126 | KBUILD_LDFLAGS += -z norelro | |
127 | endif | |
128 | ||
1f2f01b1 | 129 | CHECKFLAGS += -D__aarch64__ |
8c2c3df3 | 130 | |
3b23e499 TD |
131 | ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_REGS),y) |
132 | KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY | |
133 | CC_FLAGS_FTRACE := -fpatchable-function-entry=2 | |
134 | endif | |
135 | ||
b2f557ea AK |
136 | ifeq ($(CONFIG_KASAN_SW_TAGS), y) |
137 | KASAN_SHADOW_SCALE_SHIFT := 4 | |
0fea6e9a | 138 | else ifeq ($(CONFIG_KASAN_GENERIC), y) |
b2f557ea AK |
139 | KASAN_SHADOW_SCALE_SHIFT := 3 |
140 | endif | |
141 | ||
142 | KBUILD_CFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) | |
143 | KBUILD_CPPFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) | |
144 | KBUILD_AFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) | |
145 | ||
8c2c3df3 | 146 | libs-y := arch/arm64/lib/ $(libs-y) |
c1aac64d | 147 | libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a |
8c2c3df3 CM |
148 | |
149 | # Default target when executing plain make | |
06995804 | 150 | boot := arch/arm64/boot |
c37b830f AB |
151 | |
152 | ifeq ($(CONFIG_EFI_ZBOOT),) | |
06995804 | 153 | KBUILD_IMAGE := $(boot)/Image.gz |
c37b830f AB |
154 | else |
155 | KBUILD_IMAGE := $(boot)/vmlinuz.efi | |
156 | endif | |
8c2c3df3 | 157 | |
c37b830f | 158 | all: $(notdir $(KBUILD_IMAGE)) |
8c2c3df3 | 159 | |
8c2c3df3 | 160 | |
c37b830f | 161 | Image vmlinuz.efi: vmlinux |
0723c05f OJ |
162 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
163 | ||
9ca4e58c | 164 | Image.%: Image |
70f915a2 | 165 | $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
8c2c3df3 | 166 | |
f774f5bb | 167 | install: KBUILD_IMAGE := $(boot)/Image |
70a4039b | 168 | install zinstall: |
f774f5bb | 169 | $(call cmd,install) |
8c2c3df3 | 170 | |
3c01742a KM |
171 | PHONY += vdso_install |
172 | vdso_install: | |
173 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ | |
5d28ba5f FL |
174 | $(if $(CONFIG_COMPAT_VDSO), \ |
175 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 $@) | |
3c01742a | 176 | |
0c6c2d36 MB |
177 | archprepare: |
178 | $(Q)$(MAKE) $(build)=arch/arm64/tools kapi | |
64ee84c7 MY |
179 | ifeq ($(CONFIG_ARM64_ERRATUM_843419),y) |
180 | ifneq ($(CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843419),y) | |
181 | @echo "warning: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum" >&2 | |
182 | endif | |
183 | endif | |
184 | ifeq ($(CONFIG_ARM64_USE_LSE_ATOMICS),y) | |
185 | ifneq ($(CONFIG_ARM64_LSE_ATOMICS),y) | |
186 | @echo "warning: LSE atomics not supported by binutils" >&2 | |
187 | endif | |
188 | endif | |
189 | ||
98356eb0 | 190 | ifeq ($(KBUILD_EXTMOD),) |
a66649da KB |
191 | # We need to generate vdso-offsets.h before compiling certain files in kernel/. |
192 | # In order to do that, we should use the archprepare target, but we can't since | |
193 | # asm-offsets.h is included in some files used to generate vdso-offsets.h, and | |
194 | # asm-offsets.h is built in prepare0, for which archprepare is a dependency. | |
195 | # Therefore we need to generate the header after prepare0 has been made, hence | |
196 | # this hack. | |
197 | prepare: vdso_prepare | |
198 | vdso_prepare: prepare0 | |
a5b8ca97 MY |
199 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso \ |
200 | include/generated/vdso-offsets.h arch/arm64/kernel/vdso/vdso.so | |
201 | ifdef CONFIG_COMPAT_VDSO | |
202 | $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 \ | |
203 | include/generated/vdso32-offsets.h arch/arm64/kernel/vdso32/vdso.so | |
204 | endif | |
98356eb0 | 205 | endif |
a66649da | 206 | |
8c2c3df3 CM |
207 | define archhelp |
208 | echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)' | |
209 | echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' | |
210 | echo ' install - Install uncompressed kernel' | |
211 | echo ' zinstall - Install compressed kernel' | |
212 | echo ' Install using (your) ~/bin/installkernel or' | |
213 | echo ' (distribution) /sbin/installkernel or' | |
214 | echo ' install to $$(INSTALL_PATH) and run lilo' | |
215 | endef |