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
=$(TEXT_OFFSET
)
15 OBJCOPYFLAGS
:=-O binary
-R .note
-R .note.gnu.build-id
-R .comment
-S
18 ifneq ($(CONFIG_RELOCATABLE
),)
19 LDFLAGS_vmlinux
+= -pie
22 KBUILD_DEFCONFIG
:= defconfig
24 # Check for binutils support for specific extensions
25 lseinstr
:= $(call as-instr
,.arch_extension lse
,-DCONFIG_AS_LSE
=1)
27 ifeq ($(CONFIG_ARM64_LSE_ATOMICS
), y
)
29 $(warning LSE atomics not supported by binutils
)
33 KBUILD_CFLAGS
+= -mgeneral-regs-only
$(lseinstr
)
34 KBUILD_CFLAGS
+= -fno-asynchronous-unwind-tables
35 KBUILD_CFLAGS
+= $(call cc-option
, -mpc-relative-literal-loads
)
36 KBUILD_AFLAGS
+= $(lseinstr
)
38 ifeq ($(CONFIG_CPU_BIG_ENDIAN
), y
)
39 KBUILD_CPPFLAGS
+= -mbig-endian
43 KBUILD_CPPFLAGS
+= -mlittle-endian
48 CHECKFLAGS
+= -D__aarch64__
50 ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE
), y
)
51 KBUILD_CFLAGS_MODULE
+= -mcmodel
=large
54 ifeq ($(CONFIG_ARM64_MODULE_PLTS
),y
)
55 KBUILD_LDFLAGS_MODULE
+= -T
$(srctree
)/arch
/arm64
/kernel
/module.lds
59 head-y
:= arch
/arm64
/kernel
/head.o
61 # The byte offset of the kernel image in RAM from the start of RAM.
62 ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET
), y
)
63 TEXT_OFFSET
:= $(shell awk
"BEGIN {srand(); printf \"0x%06x\n\", \
64 int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \
65 rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}")
67 TEXT_OFFSET
:= 0x00080000
70 # KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
71 # in 32-bit arithmetic
72 KASAN_SHADOW_OFFSET
:= $(shell printf
"0x%08x00000000\n" $$(( \
73 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS
) - 32))) \
74 + (1 << ($(CONFIG_ARM64_VA_BITS
) - 32 - 3)) \
75 - (1 << (64 - 32 - 3)) )) )
77 export TEXT_OFFSET GZFLAGS
79 core-y
+= arch
/arm64
/kernel
/ arch
/arm64
/mm
/
80 core-
$(CONFIG_NET
) += arch
/arm64
/net
/
81 core-
$(CONFIG_KVM
) += arch
/arm64
/kvm
/
82 core-
$(CONFIG_XEN
) += arch
/arm64
/xen
/
83 core-
$(CONFIG_CRYPTO
) += arch
/arm64
/crypto
/
84 libs-y
:= arch
/arm64
/lib
/ $(libs-y
)
85 core-
$(CONFIG_EFI_STUB
) += $(objtree
)/drivers
/firmware
/efi
/libstub
/lib.a
87 # Default target when executing plain make
88 KBUILD_IMAGE
:= Image.gz
91 all: $(KBUILD_IMAGE
) $(KBUILD_DTBS
)
93 boot
:= arch
/arm64
/boot
96 $(Q
)$(MAKE
) $(build
)=$(boot
) $(boot
)/$@
99 $(Q
)$(MAKE
) $(build
)=$(boot
) $(boot
)/$@
102 $(Q
)$(MAKE
) $(build
)=$(boot
) $@
105 $(Q
)$(MAKE
) $(build
)=$(boot
)/dts
$(boot
)/dts
/$@
107 PHONY
+= dtbs dtbs_install
109 dtbs
: prepare scripts
110 $(Q
)$(MAKE
) $(build
)=$(boot
)/dts
113 $(Q
)$(MAKE
) $(dtbinst
)=$(boot
)/dts
115 PHONY
+= vdso_install
117 $(Q
)$(MAKE
) $(build
)=arch
/arm64
/kernel
/vdso
$@
119 # We use MRPROPER_FILES and CLEAN_FILES now
121 $(Q
)$(MAKE
) $(clean)=$(boot
)
122 $(Q
)$(MAKE
) $(clean)=$(boot
)/dts
125 echo
'* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
126 echo
' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
127 echo
'* dtbs - Build device tree blobs for enabled boards'
128 echo
' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
129 echo
' install - Install uncompressed kernel'
130 echo
' zinstall - Install compressed kernel'
131 echo
' Install using (your) ~/bin/installkernel or'
132 echo
' (distribution) /sbin/installkernel or'
133 echo
' install to $$(INSTALL_PATH) and run lilo'