mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
81361b837a
- Increase the -falign-functions alignment for the debug option.
- Remove ugly libelf checks from the top Makefile.
- Make the silent build (-s) more silent.
- Re-compile the kernel if KBUILD_BUILD_TIMESTAMP is specified.
- Various script cleanups
-----BEGIN PGP SIGNATURE-----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=Za8V
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Increase the -falign-functions alignment for the debug option.
- Remove ugly libelf checks from the top Makefile.
- Make the silent build (-s) more silent.
- Re-compile the kernel if KBUILD_BUILD_TIMESTAMP is specified.
- Various script cleanups
* tag 'kbuild-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (27 commits)
scripts: add generic syscallnr.sh
scripts: check duplicated syscall number in syscall table
sparc: syscalls: use pattern rules to generate syscall headers
parisc: syscalls: use pattern rules to generate syscall headers
nds32: add arch/nds32/boot/.gitignore
kbuild: mkcompile_h: consider timestamp if KBUILD_BUILD_TIMESTAMP is set
kbuild: modpost: Explicitly warn about unprototyped symbols
kbuild: remove trailing slashes from $(KBUILD_EXTMOD)
kconfig.h: explain IS_MODULE(), IS_ENABLED()
kconfig: constify long_opts
scripts/setlocalversion: simplify the short version part
scripts/setlocalversion: factor out 12-chars hash construction
scripts/setlocalversion: add more comments to -dirty flag detection
scripts/setlocalversion: remove workaround for old make-kpkg
scripts/setlocalversion: remove mercurial, svn and git-svn supports
kbuild: clean up ${quiet} checks in shell scripts
kbuild: sink stdout from cmd for silent build
init: use $(call cmd,) for generating include/generated/compile.h
kbuild: merge scripts/mkmakefile to top Makefile
sh: move core-y in arch/sh/Makefile to arch/sh/Kbuild
...
209 lines
6.8 KiB
Makefile
209 lines
6.8 KiB
Makefile
#
|
|
# arch/arm64/Makefile
|
|
#
|
|
# This file is included by the global makefile so that you can add your own
|
|
# architecture-specific flags and dependencies.
|
|
#
|
|
# This file is subject to the terms and conditions of the GNU General Public
|
|
# License. See the file "COPYING" in the main directory of this archive
|
|
# for more details.
|
|
#
|
|
# Copyright (C) 1995-2001 by Russell King
|
|
|
|
LDFLAGS_vmlinux :=--no-undefined -X
|
|
|
|
ifeq ($(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)
|
|
ifneq ($(CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843419),y)
|
|
$(warning ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum)
|
|
else
|
|
LDFLAGS_vmlinux += --fix-cortex-a53-843419
|
|
endif
|
|
endif
|
|
|
|
ifeq ($(CONFIG_ARM64_USE_LSE_ATOMICS), y)
|
|
ifneq ($(CONFIG_ARM64_LSE_ATOMICS), y)
|
|
$(warning LSE atomics not supported by binutils)
|
|
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 "$$TMP" -,,-DCONFIG_CC_HAS_K_CONSTRAINT=1)
|
|
|
|
ifeq ($(CONFIG_BROKEN_GAS_INST),y)
|
|
$(warning Detected assembler with broken .inst; disassembly will be unreliable)
|
|
endif
|
|
|
|
KBUILD_CFLAGS += -mgeneral-regs-only \
|
|
$(compat_vdso) $(cc_has_k_constraint)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, psabi)
|
|
KBUILD_AFLAGS += $(compat_vdso)
|
|
|
|
KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)
|
|
KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)
|
|
|
|
# Avoid generating .eh_frame* sections.
|
|
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
|
|
KBUILD_AFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
|
|
|
|
ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
|
|
prepare: stack_protector_prepare
|
|
stack_protector_prepare: prepare0
|
|
$(eval KBUILD_CFLAGS += -mstack-protector-guard=sysreg \
|
|
-mstack-protector-guard-reg=sp_el0 \
|
|
-mstack-protector-guard-offset=$(shell \
|
|
awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
|
|
include/generated/asm-offsets.h))
|
|
endif
|
|
|
|
# Ensure that if the compiler supports branch protection we default it
|
|
# off, this will be overridden if we are using branch protection.
|
|
branch-prot-flags-y += $(call cc-option,-mbranch-protection=none)
|
|
|
|
ifeq ($(CONFIG_ARM64_PTR_AUTH_KERNEL),y)
|
|
branch-prot-flags-$(CONFIG_CC_HAS_SIGN_RETURN_ADDRESS) := -msign-return-address=all
|
|
# We enable additional protection for leaf functions as there is some
|
|
# narrow potential for ROP protection benefits and no substantial
|
|
# performance impact has been observed.
|
|
ifeq ($(CONFIG_ARM64_BTI_KERNEL),y)
|
|
branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET_BTI) := -mbranch-protection=pac-ret+leaf+bti
|
|
else
|
|
branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET) := -mbranch-protection=pac-ret+leaf
|
|
endif
|
|
# -march=armv8.3-a enables the non-nops instructions for PAC, to avoid the
|
|
# compiler to generate them and consequently to break the single image contract
|
|
# we pass it only to the assembler. This option is utilized only in case of non
|
|
# integrated assemblers.
|
|
ifeq ($(CONFIG_AS_HAS_PAC), y)
|
|
asm-arch := armv8.3-a
|
|
endif
|
|
endif
|
|
|
|
KBUILD_CFLAGS += $(branch-prot-flags-y)
|
|
|
|
ifeq ($(CONFIG_AS_HAS_ARMV8_4), y)
|
|
# make sure to pass the newest target architecture to -march.
|
|
asm-arch := armv8.4-a
|
|
endif
|
|
|
|
ifeq ($(CONFIG_AS_HAS_ARMV8_5), y)
|
|
# make sure to pass the newest target architecture to -march.
|
|
asm-arch := armv8.5-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_REGS),y)
|
|
KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
|
|
CC_FLAGS_FTRACE := -fpatchable-function-entry=2
|
|
endif
|
|
|
|
# Default value
|
|
head-y := arch/arm64/kernel/head.o
|
|
|
|
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
|
|
KBUILD_IMAGE := $(boot)/Image.gz
|
|
|
|
all: Image.gz
|
|
|
|
|
|
Image: vmlinux
|
|
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
|
|
|
|
Image.%: Image
|
|
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
|
|
|
|
zinstall install:
|
|
$(Q)$(MAKE) $(build)=$(boot) $@
|
|
|
|
PHONY += vdso_install
|
|
vdso_install:
|
|
$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
|
|
$(if $(CONFIG_COMPAT_VDSO), \
|
|
$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 $@)
|
|
|
|
archprepare:
|
|
$(Q)$(MAKE) $(build)=arch/arm64/tools kapi
|
|
|
|
# We use MRPROPER_FILES and CLEAN_FILES now
|
|
archclean:
|
|
$(Q)$(MAKE) $(clean)=$(boot)
|
|
|
|
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
|
|
|
|
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
|