4 # This file is included by the global makefile so that you can add your own
5 # architecture-specific flags and dependencies.
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
11 # Copyright (C) 1995-2001 by Russell King
13 LDFLAGS_vmlinux
:=-p
--no-undefined
-X
14 CPPFLAGS_vmlinux.lds
= -DTEXT_OFFSET
=$(TEXT_OFFSET
)
17 ifneq ($(CONFIG_RELOCATABLE
),)
18 LDFLAGS_vmlinux
+= -pie
-shared
-Bsymbolic
21 ifeq ($(CONFIG_ARM64_ERRATUM_843419
),y
)
22 ifeq ($(call ld-option
, --fix-cortex-a53-843419
),)
23 $(warning
ld does not support
--fix-cortex-a53-843419
; kernel may be susceptible to erratum
)
25 LDFLAGS_vmlinux
+= --fix-cortex-a53-843419
29 KBUILD_DEFCONFIG
:= defconfig
31 # Check for binutils support for specific extensions
32 lseinstr
:= $(call as-instr
,.arch_extension lse
,-DCONFIG_AS_LSE
=1)
34 ifeq ($(CONFIG_ARM64_LSE_ATOMICS
), y
)
36 $(warning LSE atomics not supported by binutils
)
40 brokengasinst
:= $(call as-instr
,1:\n.inst
0\n.rept .
- 1b
\n\nnop
\n.endr
\n,,-DCONFIG_BROKEN_GAS_INST
=1)
42 ifneq ($(brokengasinst
),)
43 $(warning Detected assembler with broken .inst
; disassembly will be unreliable
)
46 KBUILD_CFLAGS
+= -mgeneral-regs-only
$(lseinstr
) $(brokengasinst
)
47 KBUILD_CFLAGS
+= -fno-asynchronous-unwind-tables
48 KBUILD_CFLAGS
+= $(call cc-option
, -mpc-relative-literal-loads
)
49 KBUILD_AFLAGS
+= $(lseinstr
) $(brokengasinst
)
51 ifeq ($(CONFIG_CPU_BIG_ENDIAN
), y
)
52 KBUILD_CPPFLAGS
+= -mbig-endian
55 UTS_MACHINE
:= aarch64_be
57 KBUILD_CPPFLAGS
+= -mlittle-endian
60 UTS_MACHINE
:= aarch64
63 CHECKFLAGS
+= -D__aarch64__
65 ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE
), y
)
66 KBUILD_CFLAGS_MODULE
+= -mcmodel
=large
69 ifeq ($(CONFIG_ARM64_MODULE_PLTS
),y
)
70 KBUILD_LDFLAGS_MODULE
+= -T
$(srctree
)/arch
/arm64
/kernel
/module.lds
74 head-y
:= arch
/arm64
/kernel
/head.o
76 # The byte offset of the kernel image in RAM from the start of RAM.
77 ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET
), y
)
78 TEXT_OFFSET
:= $(shell awk
"BEGIN {srand(); printf \"0x%06x\n\", \
79 int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \
80 rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}")
82 TEXT_OFFSET
:= 0x00080000
85 # KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
86 # in 32-bit arithmetic
87 KASAN_SHADOW_OFFSET
:= $(shell printf
"0x%08x00000000\n" $$(( \
88 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS
) - 32))) \
89 + (1 << ($(CONFIG_ARM64_VA_BITS
) - 32 - 3)) \
90 - (1 << (64 - 32 - 3)) )) )
92 export TEXT_OFFSET GZFLAGS
94 core-y
+= arch
/arm64
/kernel
/ arch
/arm64
/mm
/
95 core-
$(CONFIG_NET
) += arch
/arm64
/net
/
96 core-
$(CONFIG_KVM
) += arch
/arm64
/kvm
/
97 core-
$(CONFIG_XEN
) += arch
/arm64
/xen
/
98 core-
$(CONFIG_CRYPTO
) += arch
/arm64
/crypto
/
99 libs-y
:= arch
/arm64
/lib
/ $(libs-y
)
100 core-
$(CONFIG_EFI_STUB
) += $(objtree
)/drivers
/firmware
/efi
/libstub
/lib.a
102 # Default target when executing plain make
103 KBUILD_IMAGE
:= Image.gz
106 all: $(KBUILD_IMAGE
) $(KBUILD_DTBS
)
108 boot
:= arch
/arm64
/boot
111 $(Q
)$(MAKE
) $(build
)=$(boot
) $(boot
)/$@
114 $(Q
)$(MAKE
) $(build
)=$(boot
) $(boot
)/$@
117 $(Q
)$(MAKE
) $(build
)=$(boot
) $@
120 $(Q
)$(MAKE
) $(build
)=$(boot
)/dts
$(boot
)/dts
/$@
122 PHONY
+= dtbs dtbs_install
124 dtbs
: prepare scripts
125 $(Q
)$(MAKE
) $(build
)=$(boot
)/dts
128 $(Q
)$(MAKE
) $(dtbinst
)=$(boot
)/dts
130 PHONY
+= vdso_install
132 $(Q
)$(MAKE
) $(build
)=arch
/arm64
/kernel
/vdso
$@
134 # We use MRPROPER_FILES and CLEAN_FILES now
136 $(Q
)$(MAKE
) $(clean)=$(boot
)
137 $(Q
)$(MAKE
) $(clean)=$(boot
)/dts
139 # We need to generate vdso-offsets.h before compiling certain files in kernel/.
140 # In order to do that, we should use the archprepare target, but we can't since
141 # asm-offsets.h is included in some files used to generate vdso-offsets.h, and
142 # asm-offsets.h is built in prepare0, for which archprepare is a dependency.
143 # Therefore we need to generate the header after prepare0 has been made, hence
145 prepare
: vdso_prepare
146 vdso_prepare
: prepare0
147 $(Q
)$(MAKE
) $(build
)=arch
/arm64
/kernel
/vdso
include/generated
/vdso-offsets.h
150 echo
'* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
151 echo
' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
152 echo
'* dtbs - Build device tree blobs for enabled boards'
153 echo
' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
154 echo
' install - Install uncompressed kernel'
155 echo
' zinstall - Install compressed kernel'
156 echo
' Install using (your) ~/bin/installkernel or'
157 echo
' (distribution) /sbin/installkernel or'
158 echo
' install to $$(INSTALL_PATH) and run lilo'