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%03x000\n", int(512 * rand())}')
65 TEXT_OFFSET
:= 0x00080000
68 # KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
69 # in 32-bit arithmetic
70 KASAN_SHADOW_OFFSET
:= $(shell printf
"0x%08x00000000\n" $$(( \
71 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS
) - 32))) \
72 + (1 << ($(CONFIG_ARM64_VA_BITS
) - 32 - 3)) \
73 - (1 << (64 - 32 - 3)) )) )
75 export TEXT_OFFSET GZFLAGS
77 core-y
+= arch
/arm64
/kernel
/ arch
/arm64
/mm
/
78 core-
$(CONFIG_NET
) += arch
/arm64
/net
/
79 core-
$(CONFIG_KVM
) += arch
/arm64
/kvm
/
80 core-
$(CONFIG_XEN
) += arch
/arm64
/xen
/
81 core-
$(CONFIG_CRYPTO
) += arch
/arm64
/crypto
/
82 libs-y
:= arch
/arm64
/lib
/ $(libs-y
)
83 core-
$(CONFIG_EFI_STUB
) += $(objtree
)/drivers
/firmware
/efi
/libstub
/lib.a
85 # Default target when executing plain make
86 KBUILD_IMAGE
:= Image.gz
89 all: $(KBUILD_IMAGE
) $(KBUILD_DTBS
)
91 boot
:= arch
/arm64
/boot
94 $(Q
)$(MAKE
) $(build
)=$(boot
) $(boot
)/$@
97 $(Q
)$(MAKE
) $(build
)=$(boot
) $(boot
)/$@
100 $(Q
)$(MAKE
) $(build
)=$(boot
) $@
103 $(Q
)$(MAKE
) $(build
)=$(boot
)/dts
$(boot
)/dts
/$@
105 PHONY
+= dtbs dtbs_install
107 dtbs
: prepare scripts
108 $(Q
)$(MAKE
) $(build
)=$(boot
)/dts
111 $(Q
)$(MAKE
) $(dtbinst
)=$(boot
)/dts
113 PHONY
+= vdso_install
115 $(Q
)$(MAKE
) $(build
)=arch
/arm64
/kernel
/vdso
$@
117 # We use MRPROPER_FILES and CLEAN_FILES now
119 $(Q
)$(MAKE
) $(clean)=$(boot
)
120 $(Q
)$(MAKE
) $(clean)=$(boot
)/dts
123 echo
'* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
124 echo
' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
125 echo
'* dtbs - Build device tree blobs for enabled boards'
126 echo
' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
127 echo
' install - Install uncompressed kernel'
128 echo
' zinstall - Install compressed kernel'
129 echo
' Install using (your) ~/bin/installkernel or'
130 echo
' (distribution) /sbin/installkernel or'
131 echo
' install to $$(INSTALL_PATH) and run lilo'