Quelle  Makefile   Sprache: C

java.lang.NullPointerException
# arch/arm64/Makefile
java.lang.NullPointerException
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
java.lang.NullPointerException
# This file is subject to the terms and conditions of the GNU General Public
# License.  See the file "COPYING" in the main directory of this archive
# for more details.
java.lang.NullPointerException
# Copyright (C) 1995-2001 by Russell King

LDFLAGS_vmlinux :=--no-undefined -X --pic-veneer

ifeq ($(CONFIG_RELOCATABLE), y)
# Pass --no-apply-dynamic-relocs to restore pre-binutils-2.27 behaviour
# for relative relocs, since this leads to better Image compression
# with the relocation offsets always being zero.
LDFLAGS_vmlinux += -shared -Bsymbolic -z notext --no-apply-dynamic-relocs
endif

ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
LDFLAGS_vmlinux += --fix-cortex-a53-843419
endif

cc_has_k_constraint := $(call try-run,echo    \
 'int main(void) { \
  asm volatile("and w0, w0, %w0" :: "K" (4294967295)); \
  return 0;      \
 }' | $(CC) -S -x c -o "$$TMP" -,,-DCONFIG_CC_HAS_K_CONSTRAINT=1)

ifeq ($(CONFIG_BROKEN_GAS_INST),y)
$(warning Detected assembler with broken .inst; disassembly will be unreliable)
endif

# The GCC option -ffreestanding is required in order to compile code containing
# ARM/NEON intrinsics in a non C99-compliant environment (such as the kernel)
CC_FLAGS_FPU := -ffreestanding
# Enable <arm_neon.h>
CC_FLAGS_FPU += -isystem $(shell $(CC) -print-file-name=include)
CC_FLAGS_NO_FPU := -mgeneral-regs-only

KBUILD_CFLAGS += $(CC_FLAGS_NO_FPU) \
     $(compat_vdso) $(cc_has_k_constraint)
KBUILD_CFLAGS += $(call cc-disable-warning, psabi)
KBUILD_AFLAGS += $(compat_vdso)

ifeq ($(call rustc-min-version, 108500),y)
KBUILD_RUSTFLAGS += --target=aarch64-unknown-none-softfloat
else
KBUILD_RUSTFLAGS += --target=aarch64-unknown-none -Ctarget-feature="-neon"
endif

KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)
KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)

# Avoid generating .eh_frame* sections.
ifneq ($(CONFIG_UNWIND_TABLES),y)
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
KBUILD_AFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
KBUILD_RUSTFLAGS += -Cforce-unwind-tables=n
else
KBUILD_CFLAGS += -fasynchronous-unwind-tables
KBUILD_AFLAGS += -fasynchronous-unwind-tables
KBUILD_RUSTFLAGS += -Cforce-unwind-tables=y -Zuse-sync-unwind=n
endif

ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
prepare: stack_protector_prepare
stack_protector_prepare: prepare0
 $(eval KBUILD_CFLAGS += -mstack-protector-guard=sysreg    \
    -mstack-protector-guard-reg=sp_el0   \
    -mstack-protector-guard-offset=$(shell   \
   awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
    $(objtree)/include/generated/asm-offsets.h))
endif

ifeq ($(CONFIG_ARM64_BTI_KERNEL),y)
  KBUILD_CFLAGS += -mbranch-protection=pac-ret+bti
  KBUILD_RUSTFLAGS += -Zbranch-protection=bti,pac-ret
else ifeq ($(CONFIG_ARM64_PTR_AUTH_KERNEL),y)
  KBUILD_RUSTFLAGS += -Zbranch-protection=pac-ret
  ifeq ($(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET),y)
    KBUILD_CFLAGS += -mbranch-protection=pac-ret
  else
    KBUILD_CFLAGS += -msign-return-address=non-leaf
  endif
else
  KBUILD_CFLAGS += $(call cc-option,-mbranch-protection=none)
endif

# Tell the assembler to support instructions from the latest target
# architecture.
java.lang.NullPointerException
# For non-integrated assemblers we'll pass this on the command line, and for
# integrated assemblers we'll define ARM64_ASM_ARCH and ARM64_ASM_PREAMBLE for
# inline usage.
java.lang.NullPointerException
# We cannot pass the same arch flag to the compiler as this would allow it to
# freely generate instructions which are not supported by earlier architecture
# versions, which would prevent a single kernel image from working on earlier
# hardware.
ifeq ($(CONFIG_AS_HAS_ARMV8_5), y)
  asm-arch := armv8.5-a
else
  asm-arch := armv8.4-a
endif

ifdef asm-arch
KBUILD_CFLAGS += -Wa,-march=$(asm-arch) \
     -DARM64_ASM_ARCH='"$(asm-arch)"'
endif

ifeq ($(CONFIG_SHADOW_CALL_STACK), y)
KBUILD_CFLAGS += -ffixed-x18
KBUILD_RUSTFLAGS += -Zfixed-x18
endif

ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
KBUILD_CPPFLAGS += -mbig-endian
CHECKFLAGS += -D__AARCH64EB__
# Prefer the baremetal ELF build target, but not all toolchains include
# it so fall back to the standard linux version if needed.
KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb -z norelro)
UTS_MACHINE := aarch64_be
else
KBUILD_CPPFLAGS += -mlittle-endian
CHECKFLAGS += -D__AARCH64EL__
# Same as above, prefer ELF but fall back to linux target if needed.
KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux -z norelro)
UTS_MACHINE := aarch64
endif

ifeq ($(CONFIG_LD_IS_LLD), y)
KBUILD_LDFLAGS += -z norelro
endif

CHECKFLAGS += -D__aarch64__

ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS),y)
  KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
  CC_FLAGS_FTRACE := -fpatchable-function-entry=4,2
else ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_ARGS),y)
  KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
  CC_FLAGS_FTRACE := -fpatchable-function-entry=2
endif

ifeq ($(CONFIG_KASAN_SW_TAGS), y)
KASAN_SHADOW_SCALE_SHIFT := 4
else ifeq ($(CONFIG_KASAN_GENERIC), y)
KASAN_SHADOW_SCALE_SHIFT := 3
endif

KBUILD_CFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT)
KBUILD_CPPFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT)
KBUILD_AFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT)

libs-y  := arch/arm64/lib/ $(libs-y)
libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a

# Default target when executing plain make
boot  := arch/arm64/boot

BOOT_TARGETS := Image vmlinuz.efi image.fit

PHONY += $(BOOT_TARGETS)

ifeq ($(CONFIG_EFI_ZBOOT),)
KBUILD_IMAGE := $(boot)/Image.gz
else
KBUILD_IMAGE := $(boot)/vmlinuz.efi
endif

all: $(notdir $(KBUILD_IMAGE))

image.fit: dtbs

vmlinuz.efi image.fit: Image
$(BOOT_TARGETS): vmlinux
 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

Image.%: Image
 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

ifeq ($(CONFIG_COMPRESSED_INSTALL),y)
 DEFAULT_KBUILD_IMAGE = $(KBUILD_IMAGE)
else
 DEFAULT_KBUILD_IMAGE = $(boot)/Image
endif

install: KBUILD_IMAGE := $(DEFAULT_KBUILD_IMAGE)
install zinstall:
 $(call cmd,install)

archprepare:
 $(Q)$(MAKE) $(build)=arch/arm64/tools kapi

ifeq ($(KBUILD_EXTMOD),)
# We need to generate vdso-offsets.h before compiling certain files in kernel/.
# In order to do that, we should use the archprepare target, but we can't since
# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
# Therefore we need to generate the header after prepare0 has been made, hence
# this hack.
prepare: vdso_prepare
vdso_prepare: prepare0
 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso \
 include/generated/vdso-offsets.h arch/arm64/kernel/vdso/vdso.so
ifdef CONFIG_COMPAT_VDSO
 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 \
 arch/arm64/kernel/vdso32/vdso.so
endif
endif

vdso-install-y    += arch/arm64/kernel/vdso/vdso.so.dbg
vdso-install-$(CONFIG_COMPAT_VDSO) += arch/arm64/kernel/vdso32/vdso32.so.dbg

include $(srctree)/scripts/Makefile.defconf

PHONY += virtconfig
virtconfig:
 $(call merge_into_defconfig_override,defconfig,virt)

define archhelp
  echo  '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
  echo  ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
  echo  ' image.fit - Flat Image Tree (arch/$(ARCH)/boot/image.fit)'
  echo  ' install - Install kernel (compressed if COMPRESSED_INSTALL set)'
  echo  ' zinstall - Install compressed kernel'
  echo  ' Install using (your) ~/bin/installkernel or'
  echo  ' (distribution) /sbin/installkernel or'
  echo  ' install to $$(INSTALL_PATH) and run lilo'
endef