mirror of https://gitee.com/openkylin/linux.git
517 lines
18 KiB
Makefile
517 lines
18 KiB
Makefile
# 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)
|
|
|
|
# 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 += $(dtb-y)
|
|
|
|
ifneq ($(CHECK_DTBS),)
|
|
always-y += $(patsubst %.dtb,%.dt.yaml, $(real-dtb-y))
|
|
always-y += $(patsubst %.dtbo,%.dt.yaml, $(real-dtb-y))
|
|
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-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))
|
|
|
|
# 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 = $(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-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))
|
|
_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_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__
|
|
|
|
# Objtool arguments are also needed for modfinal with LTO, so we define
|
|
# then here to avoid duplication.
|
|
objtool_args = \
|
|
$(if $(CONFIG_UNWINDER_ORC),orc generate,check) \
|
|
$(if $(part-of-module), --module,) \
|
|
$(if $(CONFIG_FRAME_POINTER),, --no-fp) \
|
|
$(if $(or $(CONFIG_GCOV_KERNEL),$(CONFIG_LTO_CLANG)), \
|
|
--no-unreachable,) \
|
|
$(if $(CONFIG_RETPOLINE), --retpoline,) \
|
|
$(if $(CONFIG_X86_SMAP), --uaccess,) \
|
|
$(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount,)
|
|
|
|
# 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
|
|
# ===========================================================================
|
|
# '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_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 '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 ?= $(objtree)/scripts/dtc/dtc
|
|
DTC_FLAGS += -Wno-interrupt_provider
|
|
|
|
# Disable noisy checks by default
|
|
ifeq ($(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))
|
|
|
|
# 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_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 $@ -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)
|
|
|
|
$(obj)/%.dtbo: $(src)/%.dts $(DTC) FORCE
|
|
$(call if_changed_dep,dtc)
|
|
|
|
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)
|
|
|
|
DT_CHECKER ?= dt-validate
|
|
DT_CHECKER_FLAGS ?= $(if $(DT_SCHEMA_FILES),,-m)
|
|
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) $(DT_CHECKER_FLAGS) -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)
|
|
|
|
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
|