diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 926 |
1 files changed, 506 insertions, 420 deletions
@@ -1,9 +1,9 @@ # SPDX-License-Identifier: GPL-2.0 -VERSION = 5 -PATCHLEVEL = 19 +VERSION = 6 +PATCHLEVEL = 8 SUBLEVEL = 0 EXTRAVERSION = -NAME = Superb Owl +NAME = Hurr durr I'ma ninja sloth # *DOCUMENTATION* # To see a list of typical targets execute "make help" @@ -11,6 +11,10 @@ NAME = Superb Owl # Comments in this file are targeted only to the developer, do not # expect to learn how to build the kernel reading this file. +ifeq ($(filter undefine,$(.FEATURES)),) +$(error GNU Make >= 3.82 is required. Your Make version is $(MAKE_VERSION)) +endif + $(if $(filter __%, $(MAKECMDGOALS)), \ $(error targets prefixed with '__' are only for internal use)) @@ -34,6 +38,10 @@ __all: # descending is started. They are now explicitly listed as the # prepare rule. +this-makefile := $(lastword $(MAKEFILE_LIST)) +abs_srctree := $(realpath $(dir $(this-makefile))) +abs_objtree := $(CURDIR) + ifneq ($(sub_make_done),1) # Do not use make's built-in rules and variables @@ -52,26 +60,21 @@ unexport GREP_OPTIONS # Beautify output # --------------------------------------------------------------------------- # -# Normally, we echo the whole command before executing it. By making -# that echo $($(quiet)$(cmd)), we now have the possibility to set -# $(quiet) to choose other forms of output instead, e.g. -# -# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ -# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< +# Most of build commands in Kbuild start with "cmd_". You can optionally define +# "quiet_cmd_*". If defined, the short log is printed. Otherwise, no log from +# that command is printed by default. # -# If $(quiet) is empty, the whole command will be printed. -# If it is set to "quiet_", only the short version will be printed. -# If it is set to "silent_", nothing will be printed at all, since -# the variable $(silent_cmd_cc_o_c) doesn't exist. +# e.g.) +# quiet_cmd_depmod = DEPMOD $(MODLIB) +# cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE) # # A simple variant is to prefix commands with $(Q) - that's useful # for commands that shall be hidden in non-verbose mode. # -# $(Q)ln $@ :< +# $(Q)$(MAKE) $(build)=scripts/basic # -# If KBUILD_VERBOSE equals 0 then the above command will be hidden. -# If KBUILD_VERBOSE equals 1 then the above command is displayed. -# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. +# If KBUILD_VERBOSE contains 1, the whole command is echoed. +# If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed. # # To put more focus on warnings, be less verbose as default # Use 'make V=1' to see the full commands @@ -79,24 +82,28 @@ unexport GREP_OPTIONS ifeq ("$(origin V)", "command line") KBUILD_VERBOSE = $(V) endif -ifndef KBUILD_VERBOSE - KBUILD_VERBOSE = 0 -endif -ifeq ($(KBUILD_VERBOSE),1) +quiet = quiet_ +Q = @ + +ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) quiet = Q = -else - quiet=quiet_ - Q = @ endif # If the user is running make -s (silent mode), suppress echoing of # commands +# make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS. -ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) - quiet=silent_ - KBUILD_VERBOSE = 0 +ifeq ($(filter 3.%,$(MAKE_VERSION)),) +short-opts := $(firstword -$(MAKEFLAGS)) +else +short-opts := $(filter-out --%,$(MAKEFLAGS)) +endif + +ifneq ($(findstring s,$(short-opts)),) +quiet=silent_ +override KBUILD_VERBOSE := endif export quiet Q KBUILD_VERBOSE @@ -120,6 +127,15 @@ endif export KBUILD_CHECKSRC +# Enable "clippy" (a linter) as part of the Rust compilation. +# +# Use 'make CLIPPY=1' to enable it. +ifeq ("$(origin CLIPPY)", "command line") + KBUILD_CLIPPY := $(CLIPPY) +endif + +export KBUILD_CLIPPY + # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the # directory of external module to build. Setting M= takes precedence. ifeq ("$(origin M)", "command line") @@ -129,6 +145,9 @@ endif $(if $(word 2, $(KBUILD_EXTMOD)), \ $(error building multiple external modules is not supported)) +$(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \ + $(error module directory path cannot contain '$x'))) + # Remove trailing slashes ifneq ($(filter %/, $(KBUILD_EXTMOD)),) KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) @@ -136,6 +155,15 @@ endif export KBUILD_EXTMOD +# backward compatibility +KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC_CHECKS) + +ifeq ("$(origin W)", "command line") + KBUILD_EXTRA_WARN := $(W) +endif + +export KBUILD_EXTRA_WARN + # Kbuild will save output files in the current working directory. # This does not need to match to the root of the kernel source tree. # @@ -162,40 +190,17 @@ ifeq ("$(origin O)", "command line") endif ifneq ($(KBUILD_OUTPUT),) -# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot -# expand a shell special character '~'. We use a somewhat tedious way here. -abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) -$(if $(abs_objtree),, \ - $(error failed to create output directory "$(KBUILD_OUTPUT)")) - +# $(realpath ...) gets empty if the path does not exist. Run 'mkdir -p' first. +$(shell mkdir -p "$(KBUILD_OUTPUT)") # $(realpath ...) resolves symlinks -abs_objtree := $(realpath $(abs_objtree)) -else -abs_objtree := $(CURDIR) +abs_objtree := $(realpath $(KBUILD_OUTPUT)) +$(if $(abs_objtree),,$(error failed to create output directory "$(KBUILD_OUTPUT)")) endif # ifneq ($(KBUILD_OUTPUT),) -ifeq ($(abs_objtree),$(CURDIR)) -# Suppress "Entering directory ..." unless we are changing the work directory. -MAKEFLAGS += --no-print-directory -else -need-sub-make := 1 -endif - -this-makefile := $(lastword $(MAKEFILE_LIST)) -abs_srctree := $(realpath $(dir $(this-makefile))) - ifneq ($(words $(subst :, ,$(abs_srctree))), 1) $(error source directory cannot contain spaces or colons) endif -ifneq ($(abs_srctree),$(abs_objtree)) -# Look for make include files relative to root of kernel src -# -# --included-dir is added for backward compatibility, but you should not rely on -# it. Please add $(srctree)/ prefix to include Makefiles in the source tree. -MAKEFLAGS += --include-dir=$(abs_srctree) -endif - ifneq ($(filter 3.%,$(MAKE_VERSION)),) # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x # We need to invoke sub-make to avoid implicit rules in the top Makefile. @@ -204,9 +209,25 @@ need-sub-make := 1 $(this-makefile): ; endif -export abs_srctree abs_objtree export sub_make_done := 1 +endif # sub_make_done + +ifeq ($(abs_objtree),$(CURDIR)) +# Suppress "Entering directory ..." if we are at the final work directory. +no-print-directory := --no-print-directory +else +# Recursion to show "Entering directory ..." +need-sub-make := 1 +endif + +ifeq ($(filter --no-print-directory, $(MAKEFLAGS)),) +# If --no-print-directory is unset, recurse once again to set it. +# You may end up recursing into __sub-make twice. This is needed due to the +# behavior change in GNU Make 4.4.1. +need-sub-make := 1 +endif + ifeq ($(need-sub-make),1) PHONY += $(MAKECMDGOALS) __sub-make @@ -216,18 +237,12 @@ $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make # Invoke a second make in the output directory, passing relevant variables __sub-make: - $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) + $(Q)$(MAKE) $(no-print-directory) -C $(abs_objtree) \ + -f $(abs_srctree)/Makefile $(MAKECMDGOALS) -endif # need-sub-make -endif # sub_make_done +else # need-sub-make # We process the rest of the Makefile if this is the final invocation of make -ifeq ($(need-sub-make),) - -# Do not print "Entering directory ...", -# but we want to display it when entering to the output directory -# so that IDEs/editors are able to understand relative filenames. -MAKEFLAGS += --no-print-directory ifeq ($(abs_srctree),$(abs_objtree)) # building in the source tree @@ -267,73 +282,64 @@ no-dot-config-targets := $(clean-targets) \ cscope gtags TAGS tags help% %docs check% coccicheck \ $(version_h) headers headers_% archheaders archscripts \ %asm-generic kernelversion %src-pkg dt_binding_check \ - outputmakefile -# Installation targets should not require compiler. Unfortunately, vdso_install -# is an exception where build artifacts may be updated. This must be fixed. -no-compiler-targets := $(no-dot-config-targets) install dtbs_install \ - headers_install modules_install kernelrelease image_name -no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ + outputmakefile rustavailable rustfmt rustfmtcheck +no-sync-config-targets := $(no-dot-config-targets) %install modules_sign kernelrelease \ image_name -single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ +single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/ config-build := mixed-build := need-config := 1 -need-compiler := 1 may-sync-config := 1 single-build := ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) - ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) - need-config := - endif -endif - -ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) - ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) - need-compiler := - endif + ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) + need-config := + endif endif ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) - ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) - may-sync-config := - endif + ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) + may-sync-config := + endif endif +need-compiler := $(may-sync-config) + ifneq ($(KBUILD_EXTMOD),) - may-sync-config := + may-sync-config := endif ifeq ($(KBUILD_EXTMOD),) - ifneq ($(filter %config,$(MAKECMDGOALS)),) - config-build := 1 - ifneq ($(words $(MAKECMDGOALS)),1) - mixed-build := 1 - endif + ifneq ($(filter %config,$(MAKECMDGOALS)),) + config-build := 1 + ifneq ($(words $(MAKECMDGOALS)),1) + mixed-build := 1 endif + endif endif # We cannot build single targets and the others at the same time ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) - single-build := 1 - ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) - mixed-build := 1 - endif + single-build := 1 + ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) + mixed-build := 1 + endif endif # For "make -j clean all", "make -j mrproper defconfig all", etc. ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) - ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) - mixed-build := 1 - endif + ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) + mixed-build := 1 + endif endif # install and modules_install need also be processed one by one ifneq ($(filter install,$(MAKECMDGOALS)),) - ifneq ($(filter modules_install,$(MAKECMDGOALS)),) - mixed-build := 1 - endif + ifneq ($(filter modules_install,$(MAKECMDGOALS)),) + mixed-build := 1 + endif endif ifdef mixed-build @@ -357,7 +363,7 @@ else # !mixed-build include $(srctree)/scripts/Kbuild.include # Read KERNELRELEASE from include/config/kernel.release (if it exists) -KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) +KERNELRELEASE = $(call read-file, include/config/kernel.release) KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION @@ -369,7 +375,7 @@ include $(srctree)/scripts/subarch.include # When performing cross compilation for other architectures ARCH shall be set # to the target architecture. (See arch/* for the possibilities). # ARCH can be set during invocation of make: -# make ARCH=ia64 +# make ARCH=arm64 # Another way is to have ARCH set in the environment. # The default ARCH is the host where make is executed. @@ -377,7 +383,7 @@ include $(srctree)/scripts/subarch.include # during compilation. Only gcc and related bin-utils executables # are prefixed with $(CROSS_COMPILE). # CROSS_COMPILE can be set on the command line -# make CROSS_COMPILE=ia64-linux- +# make CROSS_COMPILE=aarch64-linux-gnu- # Alternatively CROSS_COMPILE can be set in the environment. # Default value for CROSS_COMPILE is not to prefix executables # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile @@ -436,16 +442,35 @@ else HOSTCC = gcc HOSTCXX = g++ endif +HOSTRUSTC = rustc HOSTPKG_CONFIG = pkg-config KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ - -O2 -fomit-frame-pointer -std=gnu11 \ - -Wdeclaration-after-statement + -O2 -fomit-frame-pointer -std=gnu11 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) KBUILD_USERLDFLAGS := $(USERLDFLAGS) +# These flags apply to all Rust code in the tree, including the kernel and +# host programs. +export rust_common_flags := --edition=2021 \ + -Zbinary_dep_depinfo=y \ + -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \ + -Dunreachable_pub -Dnon_ascii_idents \ + -Wmissing_docs \ + -Drustdoc::missing_crate_level_docs \ + -Dclippy::correctness -Dclippy::style \ + -Dclippy::suspicious -Dclippy::complexity \ + -Dclippy::perf \ + -Dclippy::let_unit_value -Dclippy::mut_mut \ + -Dclippy::needless_bitwise_bool \ + -Dclippy::needless_continue \ + -Dclippy::no_mangle_with_rust_abi \ + -Wclippy::dbg_macro + KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) +KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ + -Zallow-features= $(HOSTRUSTFLAGS) KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) @@ -470,13 +495,18 @@ OBJDUMP = $(CROSS_COMPILE)objdump READELF = $(CROSS_COMPILE)readelf STRIP = $(CROSS_COMPILE)strip endif +RUSTC = rustc +RUSTDOC = rustdoc +RUSTFMT = rustfmt +CLIPPY_DRIVER = clippy-driver +BINDGEN = bindgen +CARGO = cargo PAHOLE = pahole RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids LEX = flex YACC = bison AWK = awk INSTALLKERNEL := installkernel -DEPMOD = depmod PERL = perl PYTHON3 = python3 CHECK = sparse @@ -489,15 +519,15 @@ LZ4 = lz4c XZ = xz ZSTD = zstd -PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) - CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) NOSTDINC_FLAGS := CFLAGS_MODULE = +RUSTFLAGS_MODULE = AFLAGS_MODULE = LDFLAGS_MODULE = CFLAGS_KERNEL = +RUSTFLAGS_KERNEL = AFLAGS_KERNEL = LDFLAGS_vmlinux = @@ -520,21 +550,52 @@ LINUXINCLUDE := \ $(USERINCLUDE) KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE -KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ - -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ - -Werror=implicit-function-declaration -Werror=implicit-int \ - -Werror=return-type -Wno-format-security \ - -std=gnu11 + +KBUILD_CFLAGS := +KBUILD_CFLAGS += -std=gnu11 +KBUILD_CFLAGS += -fshort-wchar +KBUILD_CFLAGS += -funsigned-char +KBUILD_CFLAGS += -fno-common +KBUILD_CFLAGS += -fno-PIE +KBUILD_CFLAGS += -fno-strict-aliasing + KBUILD_CPPFLAGS := -D__KERNEL__ +KBUILD_RUSTFLAGS := $(rust_common_flags) \ + -Cpanic=abort -Cembed-bitcode=n -Clto=n \ + -Cforce-unwind-tables=n -Ccodegen-units=1 \ + -Csymbol-mangling-version=v0 \ + -Crelocation-model=static \ + -Zfunction-sections=n \ + -Dclippy::float_arithmetic + KBUILD_AFLAGS_KERNEL := KBUILD_CFLAGS_KERNEL := +KBUILD_RUSTFLAGS_KERNEL := KBUILD_AFLAGS_MODULE := -DMODULE KBUILD_CFLAGS_MODULE := -DMODULE +KBUILD_RUSTFLAGS_MODULE := --cfg MODULE KBUILD_LDFLAGS_MODULE := KBUILD_LDFLAGS := CLANG_FLAGS := +ifeq ($(KBUILD_CLIPPY),1) + RUSTC_OR_CLIPPY_QUIET := CLIPPY + RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) +else + RUSTC_OR_CLIPPY_QUIET := RUSTC + RUSTC_OR_CLIPPY = $(RUSTC) +endif + +ifdef RUST_LIB_SRC + export RUST_LIB_SRC +endif + +# Allows the usage of unstable features in stable compilers. +export RUSTC_BOOTSTRAP := 1 + export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG +export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO +export HOSTRUSTC KBUILD_HOSTRUSTFLAGS export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD @@ -543,18 +604,16 @@ export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE +export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE -export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE -export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL -export PAHOLE_FLAGS +export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE +export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL # Files to ignore in find ... statements export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ -name CVS -o -name .pc -o -name .hg -o -name .git \) \ -prune -o -export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ - --exclude CVS --exclude .pc --exclude .hg --exclude .git # =========================================================================== # Rules shared between *config targets and build targets @@ -580,7 +639,7 @@ quiet_cmd_makefile = GEN Makefile } > Makefile outputmakefile: - $(Q)if [ -f $(srctree)/.config -o \ + @if [ -f $(srctree)/.config -o \ -d $(srctree)/include/config -o \ -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ echo >&2 "***"; \ @@ -616,7 +675,7 @@ ifdef config-build # *config targets only - make sure prerequisites are updated, and descend # in scripts/kconfig to make the *config target -# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. +# Read arch-specific Makefile to set KBUILD_DEFCONFIG as needed. # KBUILD_DEFCONFIG may point out an alternative default configuration # used for 'make defconfig' include $(srctree)/arch/$(SRCARCH)/Makefile @@ -630,7 +689,7 @@ config: outputmakefile scripts_basic FORCE else #!config-build # =========================================================================== -# Build targets only - this includes vmlinux, arch specific targets, clean +# Build targets only - this includes vmlinux, arch-specific targets, clean # targets and others. In general all targets except *config targets. # If building an external module we do not care about the all: rule @@ -642,6 +701,8 @@ else __all: modules endif +targets := + # Decide whether to build built-in, modular, or both. # Normally, just do built-in. @@ -673,11 +734,8 @@ endif ifeq ($(KBUILD_EXTMOD),) # Objects we will link into vmlinux / subdirs we need to visit -core-y := init/ usr/ arch/$(SRCARCH)/ -drivers-y := drivers/ sound/ -drivers-$(CONFIG_SAMPLES) += samples/ -drivers-$(CONFIG_NET) += net/ -drivers-y += virt/ +core-y := +drivers-y := libs-y := lib/ endif # KBUILD_EXTMOD @@ -726,7 +784,7 @@ $(KCONFIG_CONFIG): # # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, # so you cannot notice that Kconfig is waiting for the user input. -%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) +%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) $(Q)$(kecho) " SYNC $@" $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig else # !may-sync-config @@ -736,7 +794,7 @@ else # !may-sync-config PHONY += include/config/auto.conf include/config/auto.conf: - $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ + @test -e include/generated/autoconf.h -a -e $@ || ( \ echo >&2; \ echo >&2 " ERROR: Kernel configuration is invalid."; \ echo >&2 " include/generated/autoconf.h or $@ are missing.";\ @@ -748,19 +806,20 @@ endif # may-sync-config endif # need-config KBUILD_CFLAGS += -fno-delete-null-pointer-checks -KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) -KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) -KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) -KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE KBUILD_CFLAGS += -O2 -else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 -KBUILD_CFLAGS += -O3 +KBUILD_RUSTFLAGS += -Copt-level=2 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE KBUILD_CFLAGS += -Os +KBUILD_RUSTFLAGS += -Copt-level=s endif +# Always set `debug-assertions` and `overflow-checks` because their default +# depends on `opt-level` and `debug-assertions`, respectively. +KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) +KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) + # Tell gcc to never replace conditional load with a non-conditional one ifdef CONFIG_CC_IS_GCC # gcc-10 renamed --param=allow-store-data-races=0 to @@ -777,46 +836,26 @@ ifdef CONFIG_READABLE_ASM KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining endif -ifneq ($(CONFIG_FRAME_WARN),0) -KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) -endif - stackp-flags-y := -fno-stack-protector stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong KBUILD_CFLAGS += $(stackp-flags-y) -KBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror -KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds -KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH) - -ifdef CONFIG_CC_IS_CLANG -KBUILD_CPPFLAGS += -Qunused-arguments -# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable. -KBUILD_CFLAGS += -Wno-gnu -else - -# gcc inanely warns about local variables called 'main' -KBUILD_CFLAGS += -Wno-main -endif - -# These warnings generated too much noise in a regular build. -# Use make W=1 to enable them (see scripts/Makefile.extrawarn) -KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) -KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) - -# These result in bogus false positives -KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) +KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings +KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) ifdef CONFIG_FRAME_POINTER KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls +KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y else # Some targets (ARM with Thumb2, for example), can't be built with frame # pointers. For those, we don't have FUNCTION_TRACER automatically # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is # incompatible with -fomit-frame-pointer with current GCC, so we don't use # -fomit-frame-pointer with FUNCTION_TRACER. +# In the Rust target specification, "frame-pointer" is set explicitly +# to "may-omit". ifndef CONFIG_FUNCTION_TRACER KBUILD_CFLAGS += -fomit-frame-pointer endif @@ -830,9 +869,11 @@ endif # Initialize all stack variables with a zero value. ifdef CONFIG_INIT_STACK_ALL_ZERO KBUILD_CFLAGS += -ftrivial-auto-var-init=zero -ifdef CONFIG_CC_IS_CLANG -# https://bugs.llvm.org/show_bug.cgi?id=45497 -KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang +ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER +# https://github.com/llvm/llvm-project/issues/44842 +CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang +export CC_AUTO_VAR_INIT_ZERO_ENABLER +KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER) endif endif @@ -856,7 +897,9 @@ ifdef CONFIG_FTRACE_MCOUNT_USE_CC endif endif ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL - CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT + ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT + CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT + endif endif ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT ifdef CONFIG_HAVE_C_RECORDMCOUNT @@ -881,14 +924,18 @@ ifdef CONFIG_DEBUG_SECTION_MISMATCH KBUILD_CFLAGS += -fno-inline-functions-called-once endif +# `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0). ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections +KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y LDFLAGS_vmlinux += --gc-sections endif ifdef CONFIG_SHADOW_CALL_STACK +ifndef CONFIG_DYNAMIC_SCS CC_FLAGS_SCS := -fsanitize=shadow-call-stack KBUILD_CFLAGS += $(CC_FLAGS_SCS) +endif export CC_FLAGS_SCS endif @@ -903,14 +950,6 @@ CC_FLAGS_LTO += -fvisibility=hidden # Limit inlining across translation units to reduce binary size KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 - -# Check for frame size exceeding threshold during prolog/epilog insertion -# when using lld < 13.0.0. -ifneq ($(CONFIG_FRAME_WARN),0) -ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0) -KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) -endif -endif endif ifdef CONFIG_LTO @@ -920,71 +959,34 @@ export CC_FLAGS_LTO endif ifdef CONFIG_CFI_CLANG -CC_FLAGS_CFI := -fsanitize=cfi \ - -fsanitize-cfi-cross-dso \ - -fno-sanitize-cfi-canonical-jump-tables \ - -fno-sanitize-trap=cfi \ - -fno-sanitize-blacklist - -ifdef CONFIG_CFI_PERMISSIVE -CC_FLAGS_CFI += -fsanitize-recover=cfi -endif - -# If LTO flags are filtered out, we must also filter out CFI. -CC_FLAGS_LTO += $(CC_FLAGS_CFI) +CC_FLAGS_CFI := -fsanitize=kcfi KBUILD_CFLAGS += $(CC_FLAGS_CFI) export CC_FLAGS_CFI endif -ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B -KBUILD_CFLAGS += -falign-functions=64 +ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) +# Set the minimal function alignment. Use the newer GCC option +# -fmin-function-alignment if it is available, or fall back to -falign-funtions. +# See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNMENT. +ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT +KBUILD_CFLAGS += -fmin-function-alignment=$(CONFIG_FUNCTION_ALIGNMENT) +else +KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT) +endif endif # arch Makefile may override CC so keep this after arch Makefile is included NOSTDINC_FLAGS += -nostdinc -# warn about C99 declaration after statement -KBUILD_CFLAGS += -Wdeclaration-after-statement +# To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE, +# the kernel uses only C99 flexible arrays for dynamically sized trailing +# arrays. Enforce this for everything that may examine structure sizes and +# perform bounds checking. +KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3) -# Variable Length Arrays (VLAs) should not be used anywhere in the kernel -KBUILD_CFLAGS += -Wvla - -# disable pointer signed / unsigned warnings in gcc 4.0 -KBUILD_CFLAGS += -Wno-pointer-sign - -# In order to make sure new function cast mismatches are not introduced -# in the kernel (to avoid tripping CFI checking), the kernel should be -# globally built with -Wcast-function-type. -KBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) - -# disable stringop warnings in gcc 8+ -KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) - -# We'll want to enable this eventually, but it's not going away for 5.7 at least -KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) - -# Another good warning that we'll want to enable eventually -KBUILD_CFLAGS += $(call cc-disable-warning, restrict) - -# Enabled with W=2, disabled by default as noisy -ifdef CONFIG_CC_IS_GCC -KBUILD_CFLAGS += -Wno-maybe-uninitialized -endif - -ifdef CONFIG_CC_IS_GCC -# The allocators already balk at large sizes, so silence the compiler -# warnings for bounds checks involving those possible values. While -# -Wno-alloc-size-larger-than would normally be used here, earlier versions -# of gcc (<9.1) weirdly don't handle the option correctly when _other_ -# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX -# doesn't work (as it is documented to), silently resolving to "0" prior to -# version 9.1 (and producing an error more recently). Numeric values larger -# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently -# ignored, continuing to default to PTRDIFF_MAX. So, left with no other -# choice, we must perform a versioned check to disable this warning. -# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au -KBUILD_CFLAGS += $(call cc-ifversion, -ge, 0901, -Wno-alloc-size-larger-than) -endif +#Currently, disable -Wstringop-overflow for GCC 11, globally. +KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW) += $(call cc-option, -Wno-stringop-overflow) +KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) += $(call cc-option, -Wstringop-overflow) # disable invalid "can't wrap" optimizations for signed / pointers KBUILD_CFLAGS += -fno-strict-overflow @@ -997,23 +999,16 @@ ifdef CONFIG_CC_IS_GCC KBUILD_CFLAGS += -fconserve-stack endif -# Prohibit date/time macros, which would make the build non-deterministic -KBUILD_CFLAGS += -Werror=date-time - -# enforce correct pointer usage -KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) - -# Require designated initializers for all marked structures -KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) - # change __FILE__ to the relative path from the srctree KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) # include additional Makefiles when needed include-y := scripts/Makefile.extrawarn include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug +include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Makefile.btf include-$(CONFIG_KASAN) += scripts/Makefile.kasan include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan +include-$(CONFIG_KMSAN) += scripts/Makefile.kmsan include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan include-$(CONFIG_KCOV) += scripts/Makefile.kcov include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct @@ -1025,26 +1020,33 @@ include $(addprefix $(srctree)/, $(include-y)) # Do not add $(call cc-option,...) below this line. When you build the kernel # from the clean source tree, the GCC plugins do not exist at this point. -# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments +# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments KBUILD_CPPFLAGS += $(KCPPFLAGS) KBUILD_AFLAGS += $(KAFLAGS) KBUILD_CFLAGS += $(KCFLAGS) +KBUILD_RUSTFLAGS += $(KRUSTFLAGS) KBUILD_LDFLAGS_MODULE += --build-id=sha1 LDFLAGS_vmlinux += --build-id=sha1 +KBUILD_LDFLAGS += -z noexecstack +ifeq ($(CONFIG_LD_IS_BFD),y) +KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) +endif + ifeq ($(CONFIG_STRIP_ASM_SYMS),y) -LDFLAGS_vmlinux += $(call ld-option, -X,) +LDFLAGS_vmlinux += -X endif ifeq ($(CONFIG_RELR),y) -LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags +# ld.lld before 15 did not support -z pack-relative-relocs. +LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs) endif # We never want expected sections to be placed heuristically by the # linker. All sections should be explicitly named in the linker script. ifdef CONFIG_LD_ORPHAN_WARN -LDFLAGS_vmlinux += --orphan-handling=warn +LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) endif # Align the bit size of userspace programs with the kernel @@ -1095,83 +1097,77 @@ export MODORDER := $(extmod_prefix)modules.order export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps ifeq ($(KBUILD_EXTMOD),) -core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ -core-$(CONFIG_BLOCK) += block/ -core-$(CONFIG_IO_URING) += io_uring/ - -vmlinux-dirs := $(patsubst %/,%,$(filter %/, \ - $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ - $(libs-y) $(libs-m))) -vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ +build-dir := . +clean-dirs := $(sort . Documentation \ $(patsubst %/,%,$(filter %/, $(core-) \ $(drivers-) $(libs-)))) -subdir-modorder := $(addsuffix modules.order,$(filter %/, \ - $(core-y) $(core-m) $(libs-y) $(libs-m) \ - $(drivers-y) $(drivers-m))) - -build-dirs := $(vmlinux-dirs) -clean-dirs := $(vmlinux-alldirs) - +export ARCH_CORE := $(core-y) +export ARCH_LIB := $(filter %/, $(libs-y)) +export ARCH_DRIVERS := $(drivers-y) $(drivers-m) # Externally visible symbols (used by link-vmlinux.sh) -KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y)) -KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y))) + +KBUILD_VMLINUX_OBJS := ./built-in.a ifdef CONFIG_MODULES KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) else KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) endif -KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y)) -export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS +export KBUILD_VMLINUX_LIBS export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds -# used by scripts/Makefile.package -export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) -vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) - -# Recurse until adjust_autoksyms.sh is satisfied -PHONY += autoksyms_recursive ifdef CONFIG_TRIM_UNUSED_KSYMS # For the kernel to actually contain only the needed exported symbols, # we have to build modules as well to determine what those symbols are. -# (this can be evaluated only once include/config/auto.conf has been included) KBUILD_MODULES := 1 - -autoksyms_recursive: descend modules.order - $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ - "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive" endif -autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) - -quiet_cmd_autoksyms_h = GEN $@ - cmd_autoksyms_h = mkdir -p $(dir $@); \ - $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ - -$(autoksyms_h): - $(call cmd,autoksyms_h) +# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 +quiet_cmd_ar_vmlinux.a = AR $@ + cmd_ar_vmlinux.a = \ + rm -f $@; \ + $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ + $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt) -ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) +targets += vmlinux.a +vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE + $(call if_changed,ar_vmlinux.a) -# Final link of vmlinux with optional arch pass after final link -cmd_link-vmlinux = \ - $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ - $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) +PHONY += vmlinux_o +vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o -vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE - +$(call if_changed_dep,link-vmlinux) +vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o + @: -targets := vmlinux +PHONY += vmlinux +# LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux, +# not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is +# unrelated; the decompressors just happen to have the same base name, +# arch/*/boot/compressed/vmlinux. +# Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux. +# +# _LDFLAGS_vmlinux is a workaround for the 'private export' bug: +# https://savannah.gnu.org/bugs/?61463 +# For Make > 4.4, the following simple code will work: +# vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) +vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) +vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux) +vmlinux: vmlinux.o $(KBUILD_LDS) modpost + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux # The actual objects are generated when descending, # make sure no implicit rule kicks in -$(sort $(vmlinux-deps) $(subdir-modorder)): descend ; +$(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; -filechk_kernel.release = \ - echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" +ifeq ($(origin KERNELRELEASE),file) +filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree) +else +filechk_kernel.release = echo $(KERNELRELEASE) +endif # Store (new) KERNELRELEASE string in include/config/kernel.release include/config/kernel.release: FORCE @@ -1193,15 +1189,19 @@ scripts: scripts_basic scripts_dtc PHONY += prepare archprepare archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ - asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ - include/generated/autoconf.h remove-stale-files + asm-generic $(version_h) include/generated/utsrelease.h \ + include/generated/compile.h include/generated/autoconf.h remove-stale-files prepare0: archprepare $(Q)$(MAKE) $(build)=scripts/mod - $(Q)$(MAKE) $(build)=. + $(Q)$(MAKE) $(build)=. prepare # All the preparing.. prepare: prepare0 +ifdef CONFIG_RUST + +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh + $(Q)$(MAKE) $(build)=rust +endif PHONY += remove-stale-files remove-stale-files: @@ -1256,6 +1256,12 @@ $(version_h): FORCE include/generated/utsrelease.h: include/config/kernel.release FORCE $(call filechk,utsrelease.h) +filechk_compile.h = $(srctree)/scripts/mkcompile_h \ + "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" + +include/generated/compile.h: FORCE + $(call filechk,compile.h) + PHONY += headerdep headerdep: $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ @@ -1283,8 +1289,7 @@ hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj PHONY += headers headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts - $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ - $(error Headers not exportable for the $(SRCARCH) architecture)) + $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML)) $(Q)$(MAKE) $(hdr-inst)=include/uapi $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi @@ -1308,6 +1313,14 @@ quiet_cmd_install = INSTALL $(INSTALL_PATH) cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh # --------------------------------------------------------------------------- +# vDSO install + +PHONY += vdso_install +vdso_install: export INSTALL_FILES = $(vdso-install-y) +vdso_install: + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vdsoinst + +# --------------------------------------------------------------------------- # Tools ifdef CONFIG_OBJTOOL @@ -1357,8 +1370,8 @@ kselftest-%: headers FORCE PHONY += kselftest-merge kselftest-merge: $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) - $(Q)find $(srctree)/tools/testing/selftests -name config | \ - xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config + $(Q)find $(srctree)/tools/testing/selftests -name config -o -name config.$(UTS_MACHINE) | \ + xargs $(srctree)/scripts/kconfig/merge_config.sh -y -m $(objtree)/.config $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig # --------------------------------------------------------------------------- @@ -1370,25 +1383,33 @@ endif ifneq ($(dtstree),) -%.dtb: include/config/kernel.release scripts_dtc +%.dtb: dtbs_prepare $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ -%.dtbo: include/config/kernel.release scripts_dtc +%.dtbo: dtbs_prepare $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ -PHONY += dtbs dtbs_install dtbs_check -dtbs: include/config/kernel.release scripts_dtc - $(Q)$(MAKE) $(build)=$(dtstree) +PHONY += dtbs dtbs_prepare dtbs_install dtbs_check +dtbs: dtbs_prepare + $(Q)$(MAKE) $(build)=$(dtstree) need-dtbslist=1 + +# include/config/kernel.release is actually needed when installing DTBs because +# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make +# dtbs_install depend on it as dtbs_install may run as root. +dtbs_prepare: include/config/kernel.release scripts_dtc ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) export CHECK_DTBS=y -dtbs: dt_binding_check +endif + +ifneq ($(CHECK_DTBS),) +dtbs_prepare: dt_binding_check endif dtbs_check: dtbs dtbs_install: - $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.dtbinst obj=$(dtstree) ifdef CONFIG_OF_EARLY_FLATTREE all: dtbs @@ -1408,6 +1429,10 @@ PHONY += dt_binding_check dt_binding_check: scripts_dtc $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings +PHONY += dt_compatible_check +dt_compatible_check: dt_binding_check + $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@ + # --------------------------------------------------------------------------- # Modules @@ -1426,59 +1451,20 @@ endif # Build modules # -# A module can be listed more than once in obj-m resulting in -# duplicate lines in modules.order files. Those are removed -# using awk while concatenating to the final file. - -PHONY += modules -modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare - -cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@ -modules.order: $(subdir-modorder) FORCE - $(call if_changed,modules_order) +# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES +# is an exception. +ifdef CONFIG_DEBUG_INFO_BTF_MODULES +KBUILD_BUILTIN := 1 +modules: vmlinux +endif -targets += modules.order +modules: modules_prepare # Target to prepare building external modules -PHONY += modules_prepare modules_prepare: prepare $(Q)$(MAKE) $(build)=scripts scripts/module.lds -export modules_sign_only := - -ifeq ($(CONFIG_MODULE_SIG),y) -PHONY += modules_sign -modules_sign: modules_install - @: - -# modules_sign is a subset of modules_install. -# 'make modules_install modules_sign' is equivalent to 'make modules_install'. -ifeq ($(filter modules_install,$(MAKECMDGOALS)),) -modules_sign_only := y -endif -endif - -modinst_pre := -ifneq ($(filter modules_install,$(MAKECMDGOALS)),) -modinst_pre := __modinst_pre -endif - -modules_install: $(modinst_pre) -PHONY += __modinst_pre -__modinst_pre: - @rm -rf $(MODLIB)/kernel - @rm -f $(MODLIB)/source - @mkdir -p $(MODLIB)/kernel - @ln -s $(abspath $(srctree)) $(MODLIB)/source - @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ - rm -f $(MODLIB)/build ; \ - ln -s $(CURDIR) $(MODLIB)/build ; \ - fi - @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order - @cp -f modules.builtin $(MODLIB)/ - @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ - endif # CONFIG_MODULES ### @@ -1489,9 +1475,10 @@ endif # CONFIG_MODULES # make distclean Remove editor backup files, patch leftover files and the like # Directories & files removed with 'make clean' -CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ +CLEAN_FILES += vmlinux.symvers modules-only.symvers \ modules.builtin modules.builtin.modinfo modules.nsdeps \ - compile_commands.json .thinlto-cache + compile_commands.json .thinlto-cache rust/test \ + rust-project.json .vmlinux.objs .vmlinux.export.c # Directories & files removed with 'make mrproper' MRPROPER_FILES += include/config include/generated \ @@ -1502,7 +1489,8 @@ MRPROPER_FILES += include/config include/generated \ certs/signing_key.pem \ certs/x509.genkey \ vmlinux-gdb.py \ - *.spec + rpmbuild \ + rust/libmacros.so # clean - Delete most, but leave enough to build external modules # @@ -1527,6 +1515,9 @@ $(mrproper-dirs): mrproper: clean $(mrproper-dirs) $(call cmd,rmfiles) + @find . $(RCS_FIND_IGNORE) \ + \( -name '*.rmeta' \) \ + -type f -print | xargs rm -f # distclean # @@ -1565,7 +1556,6 @@ help: @echo ' mrproper - Remove all generated files + config + various backup files' @echo ' distclean - mrproper + remove editor backup and patch files' @echo '' - @echo 'Configuration targets:' @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help @echo '' @echo 'Other generic targets:' @@ -1573,6 +1563,7 @@ help: @echo '* vmlinux - Build the bare kernel' @echo '* modules - Build all modules' @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' + @echo ' vdso_install - Install unstripped vdso to INSTALL_MOD_PATH (default: /)' @echo ' dir/ - Build all files in dir and below' @echo ' dir/file.[ois] - Build specified target only' @echo ' dir/file.ll - Build the LLVM assembly file' @@ -1591,7 +1582,8 @@ help: echo ' (default: $(INSTALL_HDR_PATH))'; \ echo '' @echo 'Static analysers:' - @echo ' checkstack - Generate a list of stack hogs' + @echo ' checkstack - Generate a list of stack hogs and consider all functions' + @echo ' with a stack size larger than MINSTACKSIZE (default: 100)' @echo ' versioncheck - Sanity check on version.h usage' @echo ' includecheck - Check for duplicate included header files' @echo ' export_report - List the usages of all exported symbols' @@ -1614,6 +1606,24 @@ help: @echo ' kselftest-merge - Merge all the config dependencies of' @echo ' kselftest to existing .config.' @echo '' + @echo 'Rust targets:' + @echo ' rustavailable - Checks whether the Rust toolchain is' + @echo ' available and, if not, explains why.' + @echo ' rustfmt - Reformat all the Rust code in the kernel' + @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' + @echo ' is formatted, printing a diff otherwise.' + @echo ' rustdoc - Generate Rust documentation' + @echo ' (requires kernel .config)' + @echo ' rusttest - Runs the Rust tests' + @echo ' (requires kernel .config; downloads external repos)' + @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' + @echo ' (requires kernel .config)' + @echo ' dir/file.[os] - Build specified target only' + @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' + @echo ' Run with RUSTFMT=n to skip reformatting if needed.' + @echo ' The output is not intended to be compilable.' + @echo ' dir/file.ll - Build the LLVM assembly file' + @echo '' @$(if $(dtstree), \ echo 'Devicetree:'; \ echo '* dtbs - Build device tree blobs for enabled boards'; \ @@ -1632,9 +1642,9 @@ help: @echo 'Documentation targets:' @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp @echo '' - @echo 'Architecture specific targets ($(SRCARCH)):' + @echo 'Architecture-specific targets ($(SRCARCH)):' @$(or $(archhelp),\ - echo ' No architecture specific help defined for $(SRCARCH)') + echo ' No architecture-specific help defined for $(SRCARCH)') @echo '' @$(if $(boards), \ $(foreach b, $(boards), \ @@ -1646,19 +1656,25 @@ help: printf " %-16s - Show all of the above\\n" help-boards; \ echo '') - @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' - @echo ' make V=2 [targets] 2 => give reason for rebuild of target' + @echo ' make V=n [targets] 1: verbose build' + @echo ' 2: give reason for rebuild of target' + @echo ' V=1 and V=2 can be combined with V=12' @echo ' make O=dir [targets] Locate all output files in "dir", including .config' @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' @echo ' (sparse by default)' @echo ' make C=2 [targets] Force check of all c source with $$CHECK' @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' - @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' + @echo ' make W=n [targets] Enable extra build checks, n=1,2,3,c,e where' @echo ' 1: warnings which may be relevant and do not occur too often' @echo ' 2: warnings which occur quite often but may still be relevant' @echo ' 3: more obscure warnings, can most likely be ignored' + @echo ' c: extra checks in the configuration stage (Kconfig)' @echo ' e: warnings are being treated as errors' @echo ' Multiple levels can be combined with W=12 or W=123' + @$(if $(dtstree), \ + echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \ + echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \ + ) @echo '' @echo 'Execute "make" or "make all" to build all targets marked with [*] ' @echo 'For further info see the ./README file' @@ -1671,7 +1687,7 @@ help-boards: $(help-board-dirs) boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) $(help-board-dirs): help-%: - @echo 'Architecture specific targets ($(SRCARCH) $*):' + @echo 'Architecture-specific targets ($(SRCARCH) $*):' @$(if $(boards-per-dir), \ $(foreach b, $(boards-per-dir), \ printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ @@ -1681,14 +1697,61 @@ $(help-board-dirs): help-%: # Documentation targets # --------------------------------------------------------------------------- DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ - linkcheckdocs dochelp refcheckdocs + linkcheckdocs dochelp refcheckdocs texinfodocs infodocs PHONY += $(DOC_TARGETS) $(DOC_TARGETS): $(Q)$(MAKE) $(build)=Documentation $@ + +# Rust targets +# --------------------------------------------------------------------------- + +# "Is Rust available?" target +PHONY += rustavailable +rustavailable: + +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!" + +# Documentation target +# +# Using the singular to avoid running afoul of `no-dot-config-targets`. +PHONY += rustdoc +rustdoc: prepare + $(Q)$(MAKE) $(build)=rust $@ + +# Testing target +PHONY += rusttest +rusttest: prepare + $(Q)$(MAKE) $(build)=rust $@ + +# Formatting targets +PHONY += rustfmt rustfmtcheck + +# We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream. +# +# We match using absolute paths since `find` does not resolve them +# when matching, which is a problem when e.g. `srctree` is `..`. +# We `grep` afterwards in order to remove the directory entry itself. +rustfmt: + $(Q)find $(abs_srctree) -type f -name '*.rs' \ + -o -path $(abs_srctree)/rust/alloc -prune \ + -o -path $(abs_objtree)/rust/test -prune \ + | grep -Fv $(abs_srctree)/rust/alloc \ + | grep -Fv $(abs_objtree)/rust/test \ + | grep -Fv generated \ + | xargs $(RUSTFMT) $(rustfmt_flags) + +rustfmtcheck: rustfmt_flags = --check +rustfmtcheck: rustfmt + # Misc # --------------------------------------------------------------------------- +PHONY += misc-check +misc-check: + $(Q)$(srctree)/scripts/misc-check + +all: misc-check + PHONY += scripts_gdb scripts_gdb: prepare0 $(Q)$(MAKE) $(build)=scripts/gdb @@ -1700,6 +1763,8 @@ endif else # KBUILD_EXTMOD +filechk_kernel.release = echo $(KERNELRELEASE) + ### # External module support. # When building external modules the kernel used as basis is considered @@ -1711,9 +1776,7 @@ else # KBUILD_EXTMOD KBUILD_BUILTIN := KBUILD_MODULES := 1 -build-dirs := $(KBUILD_EXTMOD) -$(MODORDER): descend - @: +build-dir := $(KBUILD_EXTMOD) compile_commands.json: $(extmod_prefix)compile_commands.json PHONY += compile_commands.json @@ -1740,50 +1803,73 @@ help: @echo ' modules - default target, build the module(s)' @echo ' modules_install - install the module' @echo ' clean - remove generated files in module directory only' + @echo ' rust-analyzer - generate rust-project.json rust-analyzer support file' @echo '' -# no-op for external module builds -PHONY += modules_prepare +ifndef CONFIG_MODULES +modules modules_install: __external_modules_error +__external_modules_error: + @echo >&2 '***' + @echo >&2 '*** The present kernel disabled CONFIG_MODULES.' + @echo >&2 '*** You cannot build or install external modules.' + @echo >&2 '***' + @false +endif endif # KBUILD_EXTMOD # --------------------------------------------------------------------------- # Modules -PHONY += modules modules_install +PHONY += modules modules_install modules_sign modules_prepare + +modules_install: + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst \ + sign-only=$(if $(filter modules_install,$(MAKECMDGOALS)),,y) + +ifeq ($(CONFIG_MODULE_SIG),y) +# modules_sign is a subset of modules_install. +# 'make modules_install modules_sign' is equivalent to 'make modules_install'. +modules_sign: modules_install + @: +else +modules_sign: + @echo >&2 '***' + @echo >&2 '*** CONFIG_MODULE_SIG is disabled. You cannot sign modules.' + @echo >&2 '***' + @false +endif ifdef CONFIG_MODULES -modules: modules_check - $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost +$(MODORDER): $(build-dir) + @: + +# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. +# This is solely useful to speed up test compiles. +modules: modpost +ifneq ($(KBUILD_MODPOST_NOFINAL),1) + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal +endif PHONY += modules_check modules_check: $(MODORDER) $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< -quiet_cmd_depmod = DEPMOD $(MODLIB) - cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ - $(KERNELRELEASE) - -modules_install: - $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst - $(call cmd,depmod) - else # CONFIG_MODULES -# Modules not configured -# --------------------------------------------------------------------------- +modules: + @: -modules modules_install: - @echo >&2 '***' - @echo >&2 '*** The present kernel configuration has modules disabled.' - @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.' - @echo >&2 '*** to enable CONFIG_MODULES.' - @echo >&2 '***' - @exit 1 +KBUILD_MODULES := endif # CONFIG_MODULES +PHONY += modpost +modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ + $(if $(KBUILD_MODULES), modules_check) + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost + # Single targets # --------------------------------------------------------------------------- # To build individual files in subdirectories, you can do like this: @@ -1803,47 +1889,34 @@ single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) -$(single-ko): single_modpost +$(single-ko): single_modules @: -$(single-no-ko): descend +$(single-no-ko): $(build-dir) @: -ifeq ($(KBUILD_EXTMOD),) -# For the single build of in-tree modules, use a temporary file to avoid -# the situation of modules_install installing an invalid modules.order. -MODORDER := .modules.tmp +# Remove MODORDER when done because it is not the real one. +PHONY += single_modules +single_modules: $(single-no-ko) modules_prepare + $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER) + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost +ifneq ($(KBUILD_MODPOST_NOFINAL),1) + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal endif + $(Q)rm -f $(MODORDER) -PHONY += single_modpost -single_modpost: $(single-no-ko) modules_prepare - $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER) - $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost +single-goals := $(addprefix $(build-dir)/, $(single-no-ko)) KBUILD_MODULES := 1 -export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko)) - -# trim unrelated directories -build-dirs := $(foreach d, $(build-dirs), \ - $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) - endif -ifndef CONFIG_MODULES -KBUILD_MODULES := -endif - -# Handle descending into subdirectories listed in $(build-dirs) # Preset locale variables to speed up the build process. Limit locale # tweaks to this spot to avoid wrong language settings when running # make menuconfig etc. # Error messages still appears in the original language -PHONY += descend $(build-dirs) -descend: $(build-dirs) -$(build-dirs): prepare - $(Q)$(MAKE) $(build)=$@ \ - single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \ - need-builtin=1 need-modorder=1 +PHONY += $(build-dir) +$(build-dir): prepare + $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) clean-dirs := $(addprefix _clean_, $(clean-dirs)) PHONY += $(clean-dirs) clean @@ -1853,20 +1926,23 @@ $(clean-dirs): clean: $(clean-dirs) $(call cmd,rmfiles) @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ - \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ + \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ -o -name '*.ko.*' \ - -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ + -o -name '*.dtb' -o -name '*.dtbo' \ + -o -name '*.dtb.S' -o -name '*.dtbo.S' \ + -o -name '*.dt.yaml' -o -name 'dtbs-list' \ -o -name '*.dwo' -o -name '*.lst' \ - -o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \ + -o -name '*.su' -o -name '*.mod' \ -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ -o -name '*.lex.c' -o -name '*.tab.[ch]' \ -o -name '*.asn1.[ch]' \ -o -name '*.symtypes' -o -name 'modules.order' \ - -o -name '.tmp_*' \ -o -name '*.c.[012]*.*' \ -o -name '*.ll' \ -o -name '*.gcno' \ - -o -name '*.*.symversions' \) -type f -print | xargs rm -f + -o -name '*.*.symversions' \) -type f -print \ + -o -name '.tmp_*' -print \ + | xargs rm -rf # Generate tags for editors # --------------------------------------------------------------------------- @@ -1876,6 +1952,11 @@ quiet_cmd_tags = GEN $@ tags TAGS cscope gtags: FORCE $(call cmd,tags) +# IDE support targets +PHONY += rust-analyzer +rust-analyzer: + $(Q)$(MAKE) $(build)=rust $@ + # Script to generate missing namespace dependencies # --------------------------------------------------------------------------- @@ -1891,7 +1972,7 @@ quiet_cmd_gen_compile_commands = GEN $@ cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ - $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \ + $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ $(if $(CONFIG_MODULES), $(MODORDER)) FORCE $(call if_changed,gen_compile_commands) @@ -1943,12 +2024,13 @@ CHECKSTACK_ARCH := $(SUBARCH) else CHECKSTACK_ARCH := $(ARCH) endif +MINSTACKSIZE ?= 100 checkstack: $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ - $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) + $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) $(MINSTACKSIZE) kernelrelease: - @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" + @$(filechk_kernel.release) kernelversion: @echo $(KERNELVERSION) @@ -1956,6 +2038,10 @@ kernelversion: image_name: @echo $(KBUILD_IMAGE) +PHONY += run-command +run-command: + $(Q)$(KBUILD_RUN_COMMAND) + quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) cmd_rmfiles = rm -rf $(rm-files) |