diff options
Diffstat (limited to 'scripts/Makefile.lib')
| -rw-r--r-- | scripts/Makefile.lib | 478 |
1 files changed, 478 insertions, 0 deletions
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib new file mode 100644 index 000000000..941337088 --- /dev/null +++ b/scripts/Makefile.lib @@ -0,0 +1,478 @@ +# SPDX-License-Identifier: GPL-2.0 +# Backward compatibility +asflags-y += $(EXTRA_AFLAGS) +ccflags-y += $(EXTRA_CFLAGS) +cppflags-y += $(EXTRA_CPPFLAGS) +ldflags-y += $(EXTRA_LDFLAGS) +ifneq ($(always),) +$(warning 'always' is deprecated. Please use 'always-y' instead) +always-y += $(always) +endif +ifneq ($(hostprogs-y),) +$(warning 'hostprogs-y' is deprecated. Please use 'hostprogs' instead) +hostprogs += $(hostprogs-y) +endif +ifneq ($(hostprogs-m),) +$(warning 'hostprogs-m' is deprecated. Please use 'hostprogs' instead) +hostprogs += $(hostprogs-m) +endif + +# flags that take effect in current and sub directories +KBUILD_AFLAGS += $(subdir-asflags-y) +KBUILD_CFLAGS += $(subdir-ccflags-y) + +# Figure out what we need to build from the various variables +# =========================================================================== + +# When an object is listed to be built compiled-in and modular, +# only build the compiled-in version +obj-m := $(filter-out $(obj-y),$(obj-m)) + +# Libraries are always collected in one lib file. +# Filter out objects already built-in +lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m))) + +# Subdirectories we need to descend into +subdir-ym := $(sort $(subdir-y) $(subdir-m) \ + $(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m)))) + +# Handle objects in subdirs: +# - If we encounter foo/ in $(obj-y), replace it by foo/built-in.a and +# foo/modules.order +# - If we encounter foo/ in $(obj-m), replace it by foo/modules.order +# +# Generate modules.order to determine modorder. Unfortunately, we don't have +# information about ordering between -y and -m subdirs. Just put -y's first. + +ifdef need-modorder +obj-m := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m)) +else +obj-m := $(filter-out %/, $(obj-m)) +endif + +ifdef need-builtin +obj-y := $(patsubst %/, %/built-in.a, $(obj-y)) +else +obj-y := $(filter-out %/, $(obj-y)) +endif + +# If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object +multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))), $(m)))) +multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))), $(m)))) +multi-used := $(multi-used-y) $(multi-used-m) + +# Replace multi-part objects by their individual parts, +# including built-in.a from subdirectories +real-obj-y := $(foreach m, $(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) +real-obj-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m))) + +always-y += $(always-m) + +# hostprogs-always-y += foo +# ... is a shorthand for +# hostprogs += foo +# always-y += foo +hostprogs += $(hostprogs-always-y) $(hostprogs-always-m) +always-y += $(hostprogs-always-y) $(hostprogs-always-m) + +# userprogs-always-y is likewise. +userprogs += $(userprogs-always-y) $(userprogs-always-m) +always-y += $(userprogs-always-y) $(userprogs-always-m) + +# DTB +# If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built +extra-y += $(dtb-y) +extra-$(CONFIG_OF_ALL_DTBS) += $(dtb-) + +ifneq ($(CHECK_DTBS),) +extra-y += $(patsubst %.dtb,%.dt.yaml, $(dtb-y)) +extra-$(CONFIG_OF_ALL_DTBS) += $(patsubst %.dtb,%.dt.yaml, $(dtb-)) +endif + +# Add subdir path + +extra-y := $(addprefix $(obj)/,$(extra-y)) +always-y := $(addprefix $(obj)/,$(always-y)) +targets := $(addprefix $(obj)/,$(targets)) +obj-m := $(addprefix $(obj)/,$(obj-m)) +lib-y := $(addprefix $(obj)/,$(lib-y)) +real-obj-y := $(addprefix $(obj)/,$(real-obj-y)) +real-obj-m := $(addprefix $(obj)/,$(real-obj-m)) +multi-used-m := $(addprefix $(obj)/,$(multi-used-m)) +subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) + +# Finds the multi-part object the current object will be linked into. +# If the object belongs to two or more multi-part objects, list them all. +modname-multi = $(sort $(foreach m,$(multi-used),\ + $(if $(filter $*.o, $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$(m:.o=)))) + +__modname = $(if $(modname-multi),$(modname-multi),$(basetarget)) + +modname = $(subst $(space),:,$(__modname)) +modfile = $(addprefix $(obj)/,$(__modname)) + +# target with $(obj)/ and its suffix stripped +target-stem = $(basename $(patsubst $(obj)/%,%,$@)) + +# These flags are needed for modversions and compiling, so we define them here +# $(modname_flags) defines KBUILD_MODNAME as the name of the module it will +# end up in (or would, if it gets compiled in) +name-fix = $(call stringify,$(subst $(comma),_,$(subst -,_,$1))) +basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget)) +modname_flags = -DKBUILD_MODNAME=$(call name-fix,$(modname)) +modfile_flags = -DKBUILD_MODFILE=$(call stringify,$(modfile)) + +_c_flags = $(filter-out $(CFLAGS_REMOVE_$(target-stem).o), \ + $(filter-out $(ccflags-remove-y), \ + $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(ccflags-y)) \ + $(CFLAGS_$(target-stem).o)) +_a_flags = $(filter-out $(AFLAGS_REMOVE_$(target-stem).o), \ + $(filter-out $(asflags-remove-y), \ + $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(asflags-y)) \ + $(AFLAGS_$(target-stem).o)) +_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(target-stem).lds) + +# +# Enable gcov profiling flags for a file, directory or for all files depending +# on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL +# (in this order) +# +ifeq ($(CONFIG_GCOV_KERNEL),y) +_c_flags += $(if $(patsubst n%,, \ + $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \ + $(CFLAGS_GCOV)) +endif + +# +# Enable address sanitizer flags for kernel except some files or directories +# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE) +# +ifeq ($(CONFIG_KASAN),y) +_c_flags += $(if $(patsubst n%,, \ + $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \ + $(CFLAGS_KASAN), $(CFLAGS_KASAN_NOSANITIZE)) +endif + +ifeq ($(CONFIG_UBSAN),y) +_c_flags += $(if $(patsubst n%,, \ + $(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \ + $(CFLAGS_UBSAN)) +endif + +ifeq ($(CONFIG_KCOV),y) +_c_flags += $(if $(patsubst n%,, \ + $(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)$(CONFIG_KCOV_INSTRUMENT_ALL)), \ + $(CFLAGS_KCOV)) +endif + +# +# Enable KCSAN flags except some files or directories we don't want to check +# (depends on variables KCSAN_SANITIZE_obj.o, KCSAN_SANITIZE) +# +ifeq ($(CONFIG_KCSAN),y) +_c_flags += $(if $(patsubst n%,, \ + $(KCSAN_SANITIZE_$(basetarget).o)$(KCSAN_SANITIZE)y), \ + $(CFLAGS_KCSAN)) +endif + +# $(srctree)/$(src) for including checkin headers from generated source files +# $(objtree)/$(obj) for including generated headers from checkin source files +ifeq ($(KBUILD_EXTMOD),) +ifdef building_out_of_srctree +_c_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj) +_a_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj) +_cpp_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj) +endif +endif + +part-of-module = $(if $(filter $(basename $@).o, $(real-obj-m)),y) +quiet_modtag = $(if $(part-of-module),[M], ) + +modkern_cflags = \ + $(if $(part-of-module), \ + $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ + $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL) $(modfile_flags)) + +modkern_aflags = $(if $(part-of-module), \ + $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE), \ + $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)) + +c_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ + -include $(srctree)/include/linux/compiler_types.h \ + $(_c_flags) $(modkern_cflags) \ + $(basename_flags) $(modname_flags) + +a_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ + $(_a_flags) $(modkern_aflags) + +cpp_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ + $(_cpp_flags) + +ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) + +DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes + +dtc_cpp_flags = -Wp,-MMD,$(depfile).pre.tmp -nostdinc \ + $(addprefix -I,$(DTC_INCLUDE)) \ + -undef -D__DTS__ + +# Useful for describing the dependency of composite objects +# Usage: +# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add) +define multi_depend +$(foreach m, $(notdir $1), \ + $(eval $(obj)/$m: \ + $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s))))))) +endef + +quiet_cmd_copy = COPY $@ + cmd_copy = cp $< $@ + +# Shipped files +# =========================================================================== + +quiet_cmd_shipped = SHIPPED $@ +cmd_shipped = cat $< > $@ + +$(obj)/%: $(src)/%_shipped + $(call cmd,shipped) + +# Commands useful for building a boot image +# =========================================================================== +# +# Use as following: +# +# target: source(s) FORCE +# $(if_changed,ld/objcopy/gzip) +# +# and add target to extra-y so that we know we have to +# read in the saved command line + +# Linking +# --------------------------------------------------------------------------- + +quiet_cmd_ld = LD $@ + cmd_ld = $(LD) $(ld_flags) $(real-prereqs) -o $@ + +# Archive +# --------------------------------------------------------------------------- + +quiet_cmd_ar = AR $@ + cmd_ar = rm -f $@; $(AR) cDPrsT $@ $(real-prereqs) + +# Objcopy +# --------------------------------------------------------------------------- + +quiet_cmd_objcopy = OBJCOPY $@ +cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ + +# Gzip +# --------------------------------------------------------------------------- + +quiet_cmd_gzip = GZIP $@ + cmd_gzip = cat $(real-prereqs) | $(KGZIP) -n -f -9 > $@ + +# DTC +# --------------------------------------------------------------------------- +DTC ?= $(objtree)/scripts/dtc/dtc +DTC_FLAGS += -Wno-interrupt_provider + +# Disable noisy checks by default +ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),) +DTC_FLAGS += -Wno-unit_address_vs_reg \ + -Wno-unit_address_format \ + -Wno-avoid_unnecessary_addr_size \ + -Wno-alias_paths \ + -Wno-graph_child_address \ + -Wno-simple_bus_reg \ + -Wno-unique_unit_address \ + -Wno-pci_device_reg +endif + +ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),) +DTC_FLAGS += -Wnode_name_chars_strict \ + -Wproperty_name_chars_strict \ + -Winterrupt_provider +endif + +DTC_FLAGS += $(DTC_FLAGS_$(basetarget)) + +# Generate an assembly file to wrap the output of the device tree compiler +quiet_cmd_dt_S_dtb= DTB $@ +cmd_dt_S_dtb= \ +{ \ + echo '\#include <asm-generic/vmlinux.lds.h>'; \ + echo '.section .dtb.init.rodata,"a"'; \ + echo '.balign STRUCT_ALIGNMENT'; \ + echo '.global __dtb_$(subst -,_,$(*F))_begin'; \ + echo '__dtb_$(subst -,_,$(*F))_begin:'; \ + echo '.incbin "$<" '; \ + echo '__dtb_$(subst -,_,$(*F))_end:'; \ + echo '.global __dtb_$(subst -,_,$(*F))_end'; \ + echo '.balign STRUCT_ALIGNMENT'; \ +} > $@ + +$(obj)/%.dtb.S: $(obj)/%.dtb FORCE + $(call if_changed,dt_S_dtb) + +quiet_cmd_dtc = DTC $@ +cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ + $(DTC) -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \ + $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \ + -d $(depfile).dtc.tmp $(dtc-tmp) ; \ + cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) + +$(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE + $(call if_changed_dep,dtc) + +DT_CHECKER ?= dt-validate +DT_BINDING_DIR := Documentation/devicetree/bindings +# DT_TMP_SCHEMA may be overridden from Documentation/devicetree/bindings/Makefile +DT_TMP_SCHEMA ?= $(objtree)/$(DT_BINDING_DIR)/processed-schema.json + +quiet_cmd_dtb_check = CHECK $@ + cmd_dtb_check = $(DT_CHECKER) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ + +define rule_dtc + $(call cmd_and_fixdep,dtc) + $(call cmd,dtb_check) +endef + +$(obj)/%.dt.yaml: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE + $(call if_changed_rule,dtc,yaml) + +dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp) + +# Bzip2 +# --------------------------------------------------------------------------- + +# Bzip2 and LZMA do not include size in file... so we have to fake that; +# append the size as a 32-bit littleendian number as gzip does. +size_append = printf $(shell \ +dec_size=0; \ +for F in $(real-prereqs); do \ + fsize=$$($(CONFIG_SHELL) $(srctree)/scripts/file-size.sh $$F); \ + dec_size=$$(expr $$dec_size + $$fsize); \ +done; \ +printf "%08x\n" $$dec_size | \ + sed 's/\(..\)/\1 /g' | { \ + read ch0 ch1 ch2 ch3; \ + for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \ + printf '%s%03o' '\\' $$((0x$$ch)); \ + done; \ + } \ +) + +quiet_cmd_bzip2 = BZIP2 $@ + cmd_bzip2 = { cat $(real-prereqs) | $(KBZIP2) -9; $(size_append); } > $@ + +# Lzma +# --------------------------------------------------------------------------- + +quiet_cmd_lzma = LZMA $@ + cmd_lzma = { cat $(real-prereqs) | $(LZMA) -9; $(size_append); } > $@ + +quiet_cmd_lzo = LZO $@ + cmd_lzo = { cat $(real-prereqs) | $(KLZOP) -9; $(size_append); } > $@ + +quiet_cmd_lz4 = LZ4 $@ + cmd_lz4 = { cat $(real-prereqs) | $(LZ4) -l -c1 stdin stdout; \ + $(size_append); } > $@ + +# U-Boot mkimage +# --------------------------------------------------------------------------- + +MKIMAGE := $(srctree)/scripts/mkuboot.sh + +# SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces +# the number of overrides in arch makefiles +UIMAGE_ARCH ?= $(SRCARCH) +UIMAGE_COMPRESSION ?= $(if $(2),$(2),none) +UIMAGE_OPTS-y ?= +UIMAGE_TYPE ?= kernel +UIMAGE_LOADADDR ?= arch_must_set_this +UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR) +UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)' + +quiet_cmd_uimage = UIMAGE $@ + cmd_uimage = $(BASH) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \ + -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \ + -T $(UIMAGE_TYPE) \ + -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \ + -n $(UIMAGE_NAME) -d $< $@ + +# XZ +# --------------------------------------------------------------------------- +# Use xzkern to compress the kernel image and xzmisc to compress other things. +# +# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage +# of the kernel decompressor. A BCJ filter is used if it is available for +# the target architecture. xzkern also appends uncompressed size of the data +# using size_append. The .xz format has the size information available at +# the end of the file too, but it's in more complex format and it's good to +# avoid changing the part of the boot code that reads the uncompressed size. +# Note that the bytes added by size_append will make the xz tool think that +# the file is corrupt. This is expected. +# +# xzmisc doesn't use size_append, so it can be used to create normal .xz +# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very +# big dictionary would increase the memory usage too much in the multi-call +# decompression mode. A BCJ filter isn't used either. +quiet_cmd_xzkern = XZKERN $@ + cmd_xzkern = { cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh; \ + $(size_append); } > $@ + +quiet_cmd_xzmisc = XZMISC $@ + cmd_xzmisc = cat $(real-prereqs) | $(XZ) --check=crc32 --lzma2=dict=1MiB > $@ + +# ZSTD +# --------------------------------------------------------------------------- +# Appends the uncompressed size of the data using size_append. The .zst +# format has the size information available at the beginning of the file too, +# but it's in a more complex format and it's good to avoid changing the part +# of the boot code that reads the uncompressed size. +# +# Note that the bytes added by size_append will make the zstd tool think that +# the file is corrupt. This is expected. +# +# zstd uses a maximum window size of 8 MB. zstd22 uses a maximum window size of +# 128 MB. zstd22 is used for kernel compression because it is decompressed in a +# single pass, so zstd doesn't need to allocate a window buffer. When streaming +# decompression is used, like initramfs decompression, zstd22 should likely not +# be used because it would require zstd to allocate a 128 MB buffer. + +quiet_cmd_zstd = ZSTD $@ + cmd_zstd = { cat $(real-prereqs) | $(ZSTD) -19; $(size_append); } > $@ + +quiet_cmd_zstd22 = ZSTD22 $@ + cmd_zstd22 = { cat $(real-prereqs) | $(ZSTD) -22 --ultra; $(size_append); } > $@ + +# ASM offsets +# --------------------------------------------------------------------------- + +# Default sed regexp - multiline due to syntax constraints +# +# Use [:space:] because LLVM's integrated assembler inserts <tab> around +# the .ascii directive whereas GCC keeps the <space> as-is. +define sed-offsets + 's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; \ + /^->/{s:->#\(.*\):/* \1 */:; \ + s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ + s:->::; p;}' +endef + +# Use filechk to avoid rebuilds when a header changes, but the resulting file +# does not +define filechk_offsets + echo "#ifndef $2"; \ + echo "#define $2"; \ + echo "/*"; \ + echo " * DO NOT MODIFY."; \ + echo " *"; \ + echo " * This file was generated by Kbuild"; \ + echo " */"; \ + echo ""; \ + sed -ne $(sed-offsets) < $<; \ + echo ""; \ + echo "#endif" +endef |