mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 20:54:10 +08:00
c0a8574204
A common issue in Makefile is a race in parallel building.
You need to be careful to prevent multiple threads from writing to the
same file simultaneously.
Commit 3939f33450 ("ARM: 8418/1: add boot image dependencies to not
generate invalid images") addressed such a bad scenario.
A similar symptom occurs with the following command:
$ make -j$(nproc) ARCH=arm64 Image vmlinuz.efi
[ snip ]
SORTTAB vmlinux
OBJCOPY arch/arm64/boot/Image
OBJCOPY arch/arm64/boot/Image
AS arch/arm64/boot/zboot-header.o
PAD arch/arm64/boot/vmlinux.bin
GZIP arch/arm64/boot/vmlinuz
OBJCOPY arch/arm64/boot/vmlinuz.o
LD arch/arm64/boot/vmlinuz.efi.elf
OBJCOPY arch/arm64/boot/vmlinuz.efi
The log "OBJCOPY arch/arm64/boot/Image" is displayed twice.
It indicates that two threads simultaneously enter arch/arm64/boot/
and write to arch/arm64/boot/Image.
It occasionally leads to a build failure:
$ make -j$(nproc) ARCH=arm64 Image vmlinuz.efi
[ snip ]
SORTTAB vmlinux
OBJCOPY arch/arm64/boot/Image
PAD arch/arm64/boot/vmlinux.bin
truncate: Invalid number: 'arch/arm64/boot/vmlinux.bin'
make[2]: *** [drivers/firmware/efi/libstub/Makefile.zboot:13:
arch/arm64/boot/vmlinux.bin] Error 1
make[2]: *** Deleting file 'arch/arm64/boot/vmlinux.bin'
make[1]: *** [arch/arm64/Makefile:163: vmlinuz.efi] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:234: __sub-make] Error 2
vmlinuz.efi depends on Image, but such a dependency is not specified
in arch/arm64/Makefile.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: SImon Glass <sjg@chromium.org>
Link: https://lore.kernel.org/r/20231119053234.2367621-1-masahiroy@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
220 lines
7.1 KiB
Makefile
220 lines
7.1 KiB
Makefile
#
|
|
# arch/arm64/Makefile
|
|
#
|
|
# This file is included by the global makefile so that you can add your own
|
|
# architecture-specific flags and dependencies.
|
|
#
|
|
# This file is subject to the terms and conditions of the GNU General Public
|
|
# License. See the file "COPYING" in the main directory of this archive
|
|
# for more details.
|
|
#
|
|
# Copyright (C) 1995-2001 by Russell King
|
|
|
|
LDFLAGS_vmlinux :=--no-undefined -X
|
|
|
|
ifeq ($(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 \
|
|
$(call ld-option, --no-apply-dynamic-relocs)
|
|
endif
|
|
|
|
ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
|
|
ifeq ($(CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843419),y)
|
|
LDFLAGS_vmlinux += --fix-cortex-a53-843419
|
|
endif
|
|
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 "$$TMP" -,,-DCONFIG_CC_HAS_K_CONSTRAINT=1)
|
|
|
|
ifeq ($(CONFIG_BROKEN_GAS_INST),y)
|
|
$(warning Detected assembler with broken .inst; disassembly will be unreliable)
|
|
endif
|
|
|
|
KBUILD_CFLAGS += -mgeneral-regs-only \
|
|
$(compat_vdso) $(cc_has_k_constraint)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, psabi)
|
|
KBUILD_AFLAGS += $(compat_vdso)
|
|
|
|
KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)
|
|
KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)
|
|
|
|
# Avoid generating .eh_frame* sections.
|
|
ifneq ($(CONFIG_UNWIND_TABLES),y)
|
|
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
|
|
KBUILD_AFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
|
|
else
|
|
KBUILD_CFLAGS += -fasynchronous-unwind-tables
|
|
KBUILD_AFLAGS += -fasynchronous-unwind-tables
|
|
endif
|
|
|
|
ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
|
|
prepare: stack_protector_prepare
|
|
stack_protector_prepare: prepare0
|
|
$(eval KBUILD_CFLAGS += -mstack-protector-guard=sysreg \
|
|
-mstack-protector-guard-reg=sp_el0 \
|
|
-mstack-protector-guard-offset=$(shell \
|
|
awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
|
|
include/generated/asm-offsets.h))
|
|
endif
|
|
|
|
ifeq ($(CONFIG_ARM64_BTI_KERNEL),y)
|
|
KBUILD_CFLAGS += -mbranch-protection=pac-ret+bti
|
|
else ifeq ($(CONFIG_ARM64_PTR_AUTH_KERNEL),y)
|
|
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.
|
|
#
|
|
# 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.
|
|
#
|
|
# 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 ifeq ($(CONFIG_AS_HAS_ARMV8_4), y)
|
|
asm-arch := armv8.4-a
|
|
else ifeq ($(CONFIG_AS_HAS_ARMV8_3), y)
|
|
asm-arch := armv8.3-a
|
|
else ifeq ($(CONFIG_AS_HAS_ARMV8_2), y)
|
|
asm-arch := armv8.2-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
|
|
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
|
|
|
|
ifeq ($(CONFIG_EFI_ZBOOT),)
|
|
KBUILD_IMAGE := $(boot)/Image.gz
|
|
else
|
|
KBUILD_IMAGE := $(boot)/vmlinuz.efi
|
|
endif
|
|
|
|
all: $(notdir $(KBUILD_IMAGE))
|
|
|
|
vmlinuz.efi: Image
|
|
Image vmlinuz.efi: vmlinux
|
|
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
|
|
|
|
Image.%: Image
|
|
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
|
|
|
|
install: KBUILD_IMAGE := $(boot)/Image
|
|
install zinstall:
|
|
$(call cmd,install)
|
|
|
|
archprepare:
|
|
$(Q)$(MAKE) $(build)=arch/arm64/tools kapi
|
|
ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
|
|
ifneq ($(CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843419),y)
|
|
@echo "warning: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum" >&2
|
|
endif
|
|
endif
|
|
ifeq ($(CONFIG_ARM64_USE_LSE_ATOMICS),y)
|
|
ifneq ($(CONFIG_ARM64_LSE_ATOMICS),y)
|
|
@echo "warning: LSE atomics not supported by binutils" >&2
|
|
endif
|
|
endif
|
|
|
|
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 \
|
|
include/generated/vdso32-offsets.h 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/vdso.so.dbg:vdso32.so
|
|
|
|
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 ' install - Install uncompressed kernel'
|
|
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
|