tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
13LDFLAGS_vmlinux :=-p --no-undefined -X
14CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
15GZFLAGS :=-9
16
17ifneq ($(CONFIG_RELOCATABLE),)
18LDFLAGS_vmlinux += -pie -shared -Bsymbolic
19endif
20
21ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
22 ifeq ($(call ld-option, --fix-cortex-a53-843419),)
23$(warning ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum)
24 else
25LDFLAGS_vmlinux += --fix-cortex-a53-843419
26 endif
27endif
28
29KBUILD_DEFCONFIG := defconfig
30
31# Check for binutils support for specific extensions
32lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)
33
34ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
35 ifeq ($(lseinstr),)
36$(warning LSE atomics not supported by binutils)
37 endif
38endif
39
40ifeq ($(CONFIG_ARM64), y)
41brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1)
42
43 ifneq ($(brokengasinst),)
44$(warning Detected assembler with broken .inst; disassembly will be unreliable)
45 endif
46endif
47
48KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst)
49KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
50KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
51KBUILD_AFLAGS += $(lseinstr) $(brokengasinst)
52
53KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)
54KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)
55
56ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
57KBUILD_CPPFLAGS += -mbig-endian
58CHECKFLAGS += -D__AARCH64EB__
59AS += -EB
60LD += -EB
61LDFLAGS += -maarch64linuxb
62UTS_MACHINE := aarch64_be
63else
64KBUILD_CPPFLAGS += -mlittle-endian
65CHECKFLAGS += -D__AARCH64EL__
66AS += -EL
67LD += -EL
68LDFLAGS += -maarch64linux
69UTS_MACHINE := aarch64
70endif
71
72CHECKFLAGS += -D__aarch64__ -m64
73
74ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
75KBUILD_CFLAGS_MODULE += -mcmodel=large
76endif
77
78ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
79KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds
80ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
81KBUILD_LDFLAGS_MODULE += $(objtree)/arch/arm64/kernel/ftrace-mod.o
82endif
83endif
84
85# Default value
86head-y := arch/arm64/kernel/head.o
87
88# The byte offset of the kernel image in RAM from the start of RAM.
89ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
90TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \
91 int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \
92 rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}")
93else
94TEXT_OFFSET := 0x00080000
95endif
96
97# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
98# in 32-bit arithmetic
99KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
100 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
101 + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \
102 - (1 << (64 - 32 - 3)) )) )
103
104export TEXT_OFFSET GZFLAGS
105
106core-y += arch/arm64/kernel/ arch/arm64/mm/
107core-$(CONFIG_NET) += arch/arm64/net/
108core-$(CONFIG_KVM) += arch/arm64/kvm/
109core-$(CONFIG_XEN) += arch/arm64/xen/
110core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
111libs-y := arch/arm64/lib/ $(libs-y)
112core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
113
114# Default target when executing plain make
115boot := arch/arm64/boot
116KBUILD_IMAGE := $(boot)/Image.gz
117KBUILD_DTBS := dtbs
118
119all: Image.gz $(KBUILD_DTBS)
120
121
122Image: vmlinux
123 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
124
125Image.%: Image
126 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
127
128zinstall install:
129 $(Q)$(MAKE) $(build)=$(boot) $@
130
131%.dtb: scripts
132 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
133
134PHONY += dtbs dtbs_install
135
136dtbs: prepare scripts
137 $(Q)$(MAKE) $(build)=$(boot)/dts
138
139dtbs_install:
140 $(Q)$(MAKE) $(dtbinst)=$(boot)/dts
141
142PHONY += vdso_install
143vdso_install:
144 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
145
146# We use MRPROPER_FILES and CLEAN_FILES now
147archclean:
148 $(Q)$(MAKE) $(clean)=$(boot)
149 $(Q)$(MAKE) $(clean)=$(boot)/dts
150
151# We need to generate vdso-offsets.h before compiling certain files in kernel/.
152# In order to do that, we should use the archprepare target, but we can't since
153# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
154# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
155# Therefore we need to generate the header after prepare0 has been made, hence
156# this hack.
157prepare: vdso_prepare
158vdso_prepare: prepare0
159 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h
160
161define archhelp
162 echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
163 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
164 echo '* dtbs - Build device tree blobs for enabled boards'
165 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
166 echo ' install - Install uncompressed kernel'
167 echo ' zinstall - Install compressed kernel'
168 echo ' Install using (your) ~/bin/installkernel or'
169 echo ' (distribution) /sbin/installkernel or'
170 echo ' install to $$(INSTALL_PATH) and run lilo'
171endef