| # SPDX-License-Identifier: GPL-2.0 |
| # Backward compatibility |
| asflags-y += $(EXTRA_AFLAGS) |
| ccflags-y += $(EXTRA_CFLAGS) |
| cppflags-y += $(EXTRA_CPPFLAGS) |
| ldflags-y += $(EXTRA_LDFLAGS) |
| |
| # flags that take effect in current and sub directories |
| KBUILD_AFLAGS += $(subdir-asflags-y) |
| KBUILD_CFLAGS += $(subdir-ccflags-y) |
| KBUILD_RUSTFLAGS += $(subdir-rustflags-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 |
| |
| # Expand $(foo-objs) $(foo-y) etc. by replacing their individuals |
| suffix-search = $(strip $(foreach s, $3, $($(1:%$(strip $2)=%$s)))) |
| # List composite targets that are constructed by combining other targets |
| multi-search = $(sort $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $m))) |
| # List primitive targets that are compiled from source files |
| real-search = $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $(call suffix-search, $m, $2, $3), $m)) |
| |
| # If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object |
| multi-obj-y := $(call multi-search, $(obj-y), .o, -objs -y) |
| multi-obj-m := $(call multi-search, $(obj-m), .o, -objs -y -m) |
| multi-obj-ym := $(multi-obj-y) $(multi-obj-m) |
| |
| # Replace multi-part objects by their individual parts, |
| # including built-in.a from subdirectories |
| real-obj-y := $(call real-search, $(obj-y), .o, -objs -y) |
| real-obj-m := $(call real-search, $(obj-m), .o, -objs -y -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) $(userprogs-always-m) |
| |
| # DTB |
| # If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built |
| dtb-$(CONFIG_OF_ALL_DTBS) += $(dtb-) |
| |
| # Composite DTB (i.e. DTB constructed by overlay) |
| multi-dtb-y := $(call multi-search, $(dtb-y), .dtb, -dtbs) |
| # Primitive DTB compiled from *.dts |
| real-dtb-y := $(call real-search, $(dtb-y), .dtb, -dtbs) |
| # Base DTB that overlay is applied onto (each first word of $(*-dtbs) expansion) |
| base-dtb-y := $(foreach m, $(multi-dtb-y), $(firstword $(call suffix-search, $m, .dtb, -dtbs))) |
| |
| always-y += $(dtb-y) |
| |
| # Add subdir path |
| |
| ifneq ($(obj),.) |
| 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-obj-m := $(addprefix $(obj)/, $(multi-obj-m)) |
| multi-dtb-y := $(addprefix $(obj)/, $(multi-dtb-y)) |
| real-dtb-y := $(addprefix $(obj)/, $(real-dtb-y)) |
| subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) |
| endif |
| |
| # 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-obj-ym),\ |
| $(if $(filter $*.o, $(call suffix-search, $m, .o, -objs -y -m)),$(m:.o=)))) |
| |
| __modname = $(or $(modname-multi),$(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-token = $(subst $(comma),_,$(subst -,_,$1)) |
| name-fix = $(call stringify,$(call name-fix-token,$1)) |
| basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget)) |
| modname_flags = -DKBUILD_MODNAME=$(call name-fix,$(modname)) \ |
| -D__KBUILD_MODNAME=kmod_$(call name-fix-token,$(modname)) |
| modfile_flags = -DKBUILD_MODFILE=$(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)) |
| _rust_flags = $(filter-out $(RUSTFLAGS_REMOVE_$(target-stem).o), \ |
| $(filter-out $(rustflags-remove-y), \ |
| $(KBUILD_RUSTFLAGS) $(rustflags-y)) \ |
| $(RUSTFLAGS_$(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) |
| ifneq ($(CONFIG_KASAN_HW_TAGS),y) |
| _c_flags += $(if $(patsubst n%,, \ |
| $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \ |
| $(CFLAGS_KASAN), $(CFLAGS_KASAN_NOSANITIZE)) |
| endif |
| endif |
| |
| ifeq ($(CONFIG_KMSAN),y) |
| _c_flags += $(if $(patsubst n%,, \ |
| $(KMSAN_SANITIZE_$(basetarget).o)$(KMSAN_SANITIZE)y), \ |
| $(CFLAGS_KMSAN)) |
| _c_flags += $(if $(patsubst n%,, \ |
| $(KMSAN_ENABLE_CHECKS_$(basetarget).o)$(KMSAN_ENABLE_CHECKS)y), \ |
| , -mllvm -msan-disable-checks=1) |
| endif |
| |
| ifeq ($(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)) |
| # Some uninstrumented files provide implied barriers required to avoid false |
| # positives: set KCSAN_INSTRUMENT_BARRIERS for barrier instrumentation only. |
| _c_flags += $(if $(patsubst n%,, \ |
| $(KCSAN_INSTRUMENT_BARRIERS_$(basetarget).o)$(KCSAN_INSTRUMENT_BARRIERS)n), \ |
| -D__KCSAN_INSTRUMENT_BARRIERS__) |
| 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_rustflags = \ |
| $(if $(part-of-module), \ |
| $(KBUILD_RUSTFLAGS_MODULE) $(RUSTFLAGS_MODULE), \ |
| $(KBUILD_RUSTFLAGS_KERNEL) $(RUSTFLAGS_KERNEL)) |
| |
| 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) |
| |
| rust_flags = $(_rust_flags) $(modkern_rustflags) @$(objtree)/include/generated/rustc_cfg |
| |
| 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)) |
| |
| # ANDROID: Allow DTC_INCLUDE to be set by the BUILD_CONFIG. This allows one to |
| # compile an out-of-tree device tree. |
| DTC_INCLUDE += $(srctree)/scripts/dtc/include-prefixes |
| |
| dtc_cpp_flags = -Wp,-MMD,$(depfile).pre.tmp -nostdinc \ |
| $(addprefix -I,$(DTC_INCLUDE)) \ |
| -undef -D__DTS__ |
| |
| ifdef CONFIG_OBJTOOL |
| |
| objtool := $(objtree)/tools/objtool/objtool |
| |
| objtool-args-$(CONFIG_HAVE_JUMP_LABEL_HACK) += --hacks=jump_label |
| objtool-args-$(CONFIG_HAVE_NOINSTR_HACK) += --hacks=noinstr |
| objtool-args-$(CONFIG_CALL_DEPTH_TRACKING) += --hacks=skylake |
| objtool-args-$(CONFIG_X86_KERNEL_IBT) += --ibt |
| objtool-args-$(CONFIG_FINEIBT) += --cfi |
| objtool-args-$(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL) += --mcount |
| ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL |
| objtool-args-$(CONFIG_HAVE_OBJTOOL_NOP_MCOUNT) += --mnop |
| endif |
| objtool-args-$(CONFIG_UNWINDER_ORC) += --orc |
| objtool-args-$(CONFIG_RETPOLINE) += --retpoline |
| objtool-args-$(CONFIG_RETHUNK) += --rethunk |
| objtool-args-$(CONFIG_SLS) += --sls |
| objtool-args-$(CONFIG_STACK_VALIDATION) += --stackval |
| objtool-args-$(CONFIG_HAVE_STATIC_CALL_INLINE) += --static-call |
| objtool-args-$(CONFIG_HAVE_UACCESS_VALIDATION) += --uaccess |
| objtool-args-$(CONFIG_GCOV_KERNEL) += --no-unreachable |
| objtool-args-$(CONFIG_PREFIX_SYMBOLS) += --prefix=$(CONFIG_FUNCTION_PADDING_BYTES) |
| |
| objtool-args = $(objtool-args-y) \ |
| $(if $(delay-objtool), --link) \ |
| $(if $(part-of-module), --module) |
| |
| delay-objtool := $(or $(CONFIG_LTO_CLANG),$(CONFIG_X86_KERNEL_IBT)) |
| |
| cmd_objtool = $(if $(objtool-enabled), ; $(objtool) $(objtool-args) $@) |
| cmd_gen_objtooldep = $(if $(objtool-enabled), { echo ; echo '$@: $$(wildcard $(objtool))' ; } >> $(dot-target).cmd) |
| |
| endif # CONFIG_OBJTOOL |
| |
| # 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, $1, \ |
| $(eval $m: \ |
| $(addprefix $(obj)/, $(call suffix-search, $(patsubst $(obj)/%,%,$m), $2, $3)))) |
| endef |
| |
| # Copy a file |
| # =========================================================================== |
| # 'cp' preserves permissions. If you use it to copy a file in read-only srctree, |
| # the copy would be read-only as well, leading to an error when executing the |
| # rule next time. Use 'cat' instead in order to generate a writable file. |
| quiet_cmd_copy = COPY $@ |
| cmd_copy = cat $< > $@ |
| |
| $(obj)/%: $(src)/%_shipped |
| $(call cmd,copy) |
| |
| # Commands useful for building a boot image |
| # =========================================================================== |
| # |
| # Use as following: |
| # |
| # target: source(s) FORCE |
| # $(if_changed,ld/objcopy/gzip) |
| # |
| # and add target to 'targets' 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 \ |
| -Wno-unique_unit_address |
| |
| # Disable noisy checks by default |
| ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),) |
| DTC_FLAGS += -Wno-unit_address_vs_reg \ |
| -Wno-avoid_unnecessary_addr_size \ |
| -Wno-alias_paths \ |
| -Wno-graph_child_address \ |
| -Wno-simple_bus_reg |
| else |
| DTC_FLAGS += \ |
| -Wunique_unit_address_if_enabled |
| endif |
| |
| ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),) |
| DTC_FLAGS += -Wnode_name_chars_strict \ |
| -Wproperty_name_chars_strict \ |
| -Winterrupt_provider \ |
| -Wunique_unit_address |
| endif |
| |
| DTC_FLAGS += $(DTC_FLAGS_$(basetarget)) |
| |
| # Set -@ if the target is a base DTB that overlay is applied onto |
| DTC_FLAGS += $(if $(filter $(patsubst $(obj)/%,%,$@), $(base-dtb-y)), -@) |
| |
| # Generate an assembly file to wrap the output of the device tree compiler |
| quiet_cmd_wrap_S_dtb = WRAP $@ |
| cmd_wrap_S_dtb = { \ |
| symbase=__$(patsubst .%,%,$(suffix $<))_$(subst -,_,$(notdir $*)); \ |
| echo '\#include <asm-generic/vmlinux.lds.h>'; \ |
| echo '.section .dtb.init.rodata,"a"'; \ |
| echo '.balign STRUCT_ALIGNMENT'; \ |
| echo ".global $${symbase}_begin"; \ |
| echo "$${symbase}_begin:"; \ |
| echo '.incbin "$<" '; \ |
| echo ".global $${symbase}_end"; \ |
| echo "$${symbase}_end:"; \ |
| echo '.balign STRUCT_ALIGNMENT'; \ |
| } > $@ |
| |
| $(obj)/%.dtb.S: $(obj)/%.dtb FORCE |
| $(call if_changed,wrap_S_dtb) |
| |
| $(obj)/%.dtbo.S: $(obj)/%.dtbo FORCE |
| $(call if_changed,wrap_S_dtb) |
| |
| quiet_cmd_dtc = DTC $@ |
| cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ |
| $(DTC) -o $@ -b 0 \ |
| $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \ |
| -d $(depfile).dtc.tmp $(dtc-tmp) ; \ |
| cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) |
| |
| quiet_cmd_fdtoverlay = DTOVL $@ |
| cmd_fdtoverlay = $(objtree)/scripts/dtc/fdtoverlay -o $@ -i $(real-prereqs) |
| |
| $(multi-dtb-y): FORCE |
| $(call if_changed,fdtoverlay) |
| $(call multi_depend, $(multi-dtb-y), .dtb, -dtbs) |
| |
| ifneq ($(CHECK_DTBS)$(CHECK_DT_BINDING),) |
| DT_CHECKER ?= dt-validate |
| DT_CHECKER_FLAGS ?= $(if $(DT_SCHEMA_FILES),-l $(DT_SCHEMA_FILES),-m) |
| DT_BINDING_DIR := Documentation/devicetree/bindings |
| DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.json |
| |
| quiet_cmd_dtb = DTC_CHK $@ |
| cmd_dtb = $(cmd_dtc) ; $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ || true |
| else |
| quiet_cmd_dtb = $(quiet_cmd_dtc) |
| cmd_dtb = $(cmd_dtc) |
| endif |
| |
| $(obj)/%.dtb: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE |
| $(call if_changed_dep,dtb) |
| |
| $(obj)/%.dtbo: $(src)/%.dts $(DTC) FORCE |
| $(call if_changed_dep,dtc) |
| |
| $(obj)/%.dtbo: $(src)/%.dtso $(DTC) FORCE |
| $(call if_changed_dep,dtc) |
| |
| dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp) |
| |
| # Bzip2 |
| # --------------------------------------------------------------------------- |
| |
| # Bzip2 and LZMA do not include size in file... so we have to fake that; |
| # append the size as a 32-bit littleendian number as gzip does. |
| size_append = printf $(shell \ |
| dec_size=0; \ |
| for F in $(real-prereqs); do \ |
| fsize=$$($(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_file_size = GEN $@ |
| cmd_file_size = $(size_append) > $@ |
| |
| quiet_cmd_bzip2 = BZIP2 $@ |
| cmd_bzip2 = cat $(real-prereqs) | $(KBZIP2) -9 > $@ |
| |
| quiet_cmd_bzip2_with_size = BZIP2 $@ |
| cmd_bzip2_with_size = { cat $(real-prereqs) | $(KBZIP2) -9; $(size_append); } > $@ |
| |
| # Lzma |
| # --------------------------------------------------------------------------- |
| |
| quiet_cmd_lzma = LZMA $@ |
| cmd_lzma = cat $(real-prereqs) | $(LZMA) -9 > $@ |
| |
| quiet_cmd_lzma_with_size = LZMA $@ |
| cmd_lzma_with_size = { cat $(real-prereqs) | $(LZMA) -9; $(size_append); } > $@ |
| |
| quiet_cmd_lzo = LZO $@ |
| cmd_lzo = cat $(real-prereqs) | $(KLZOP) -9 > $@ |
| |
| quiet_cmd_lzo_with_size = LZO $@ |
| cmd_lzo_with_size = { cat $(real-prereqs) | $(KLZOP) -9; $(size_append); } > $@ |
| |
| quiet_cmd_lz4 = LZ4 $@ |
| cmd_lz4 = cat $(real-prereqs) | $(LZ4) -l -12 --favor-decSpeed stdin stdout > $@ |
| |
| quiet_cmd_lz4_with_size = LZ4 $@ |
| cmd_lz4_with_size = { cat $(real-prereqs) | $(LZ4) -l -12 --favor-decSpeed 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 ?= $(or $(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 > $@ |
| |
| quiet_cmd_xzkern_with_size = XZKERN $@ |
| cmd_xzkern_with_size = { 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 > $@ |
| |
| quiet_cmd_zstd22 = ZSTD22 $@ |
| cmd_zstd22 = cat $(real-prereqs) | $(ZSTD) -22 --ultra > $@ |
| |
| quiet_cmd_zstd22_with_size = ZSTD22 $@ |
| cmd_zstd22_with_size = { 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 |