447 lines
16 KiB
Makefile
447 lines
16 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)))
|
|
|
|
# Determine modorder.
|
|
# Unfortunately, we don't have information about ordering between -y
|
|
# and -m subdirs. Just put -y's first.
|
|
modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
|
|
|
|
# Handle objects in subdirs
|
|
# ---------------------------------------------------------------------------
|
|
# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.a
|
|
# and add the directory to the list of dirs to descend into: $(subdir-y)
|
|
# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
|
|
# and add the directory to the list of dirs to descend into: $(subdir-m)
|
|
__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
|
|
subdir-y += $(__subdir-y)
|
|
__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
|
|
subdir-m += $(__subdir-m)
|
|
obj-y := $(patsubst %/, %/built-in.a, $(obj-y))
|
|
obj-m := $(filter-out %/, $(obj-m))
|
|
|
|
# Subdirectories we need to descend into
|
|
subdir-ym := $(sort $(subdir-y) $(subdir-m))
|
|
|
|
# if $(foo-objs), $(foo-y), or $(foo-m) exists, foo.o is a composite object
|
|
multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
|
|
multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))), $(m))))
|
|
multi-used := $(multi-used-y) $(multi-used-m)
|
|
single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
|
|
|
|
# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
|
|
# tell kbuild to descend
|
|
subdir-obj-y := $(filter %/built-in.a, $(obj-y))
|
|
|
|
# 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=-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=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
|
|
|
|
# DTB
|
|
# If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built
|
|
extra-y += $(dtb-y)
|
|
extra-$(CONFIG_OF_ALL_DTBS) += $(dtb-)
|
|
|
|
# Add subdir path
|
|
|
|
extra-y := $(addprefix $(obj)/,$(extra-y))
|
|
always := $(addprefix $(obj)/,$(always))
|
|
targets := $(addprefix $(obj)/,$(targets))
|
|
modorder := $(addprefix $(obj)/,$(modorder))
|
|
obj-m := $(addprefix $(obj)/,$(obj-m))
|
|
lib-y := $(addprefix $(obj)/,$(lib-y))
|
|
subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
|
|
real-obj-y := $(addprefix $(obj)/,$(real-obj-y))
|
|
real-obj-m := $(addprefix $(obj)/,$(real-obj-m))
|
|
single-used-m := $(addprefix $(obj)/,$(single-used-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, all of them are
|
|
# concatenated with a colon separator.
|
|
modname-multi = $(subst $(space),:,$(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))
|
|
|
|
# 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 = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote)
|
|
basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
|
|
modname_flags = -DKBUILD_MODNAME=$(call name-fix,$(modname))
|
|
|
|
orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) \
|
|
$(ccflags-y) $(CFLAGS_$(basetarget).o)
|
|
_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
|
|
orig_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) \
|
|
$(asflags-y) $(AFLAGS_$(basetarget).o)
|
|
_a_flags = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags))
|
|
_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
|
|
|
|
#
|
|
# 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)), \
|
|
$(CFLAGS_KCOV))
|
|
endif
|
|
|
|
# If building the kernel in a separate objtree expand all occurrences
|
|
# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
|
|
|
|
ifeq ($(KBUILD_SRC),)
|
|
__c_flags = $(_c_flags)
|
|
__a_flags = $(_a_flags)
|
|
__cpp_flags = $(_cpp_flags)
|
|
else
|
|
|
|
# -I$(obj) locates generated .h files
|
|
# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
|
|
# and locates generated .h files
|
|
# FIXME: Replace both with specific CFLAGS* statements in the makefiles
|
|
__c_flags = $(if $(obj),$(call addtree,-I$(src)) -I$(obj)) \
|
|
$(call flags,_c_flags)
|
|
__a_flags = $(call flags,_a_flags)
|
|
__cpp_flags = $(call flags,_cpp_flags)
|
|
endif
|
|
|
|
c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
|
|
-include $(srctree)/include/linux/compiler_types.h \
|
|
$(__c_flags) $(modkern_cflags) \
|
|
$(basename_flags) $(modname_flags)
|
|
|
|
a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
|
|
$(__a_flags) $(modkern_aflags)
|
|
|
|
cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
|
|
$(__cpp_flags)
|
|
|
|
ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F))
|
|
|
|
DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes
|
|
|
|
dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
|
|
$(addprefix -I,$(DTC_INCLUDE)) \
|
|
-I$(srctree)/arch/$(SRCARCH)/boot/dts \
|
|
-I$(srctree)/arch/$(SRCARCH)/boot/dts/include \
|
|
-I$(objtree)/include/ \
|
|
-Iarch/$(SRCARCH)/boot/dts \
|
|
-undef -D__DTS__
|
|
|
|
ifeq ($(CONFIG_SEC_FACTORY),y)
|
|
dtc_cpp_flags += -DCONFIG_SEC_FACTORY
|
|
endif
|
|
|
|
# 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
|
|
|
|
# LEX
|
|
# ---------------------------------------------------------------------------
|
|
quiet_cmd_flex = LEX $@
|
|
cmd_flex = $(LEX) -o$@ -L $<
|
|
|
|
$(obj)/%.lex.c: $(src)/%.l FORCE
|
|
$(call if_changed,flex)
|
|
|
|
# YACC
|
|
# ---------------------------------------------------------------------------
|
|
quiet_cmd_bison = YACC $@
|
|
cmd_bison = $(YACC) -o$@ -t -l $<
|
|
|
|
$(obj)/%.tab.c: $(src)/%.y FORCE
|
|
$(call if_changed,bison)
|
|
|
|
quiet_cmd_bison_h = YACC $@
|
|
cmd_bison_h = $(YACC) -o/dev/null --defines=$@ -t -l $<
|
|
|
|
$(obj)/%.tab.h: $(src)/%.y FORCE
|
|
$(call if_changed,bison_h)
|
|
|
|
# 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) $(filter-out FORCE,$^) -o $@
|
|
|
|
# Objcopy
|
|
# ---------------------------------------------------------------------------
|
|
|
|
quiet_cmd_objcopy = OBJCOPY $@
|
|
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
|
|
|
|
# Gzip
|
|
# ---------------------------------------------------------------------------
|
|
|
|
quiet_cmd_gzip = GZIP $@
|
|
cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
|
|
(rm -f $@ ; false)
|
|
|
|
# DTC
|
|
# ---------------------------------------------------------------------------
|
|
DTC ?= $(objtree)/scripts/dtc/dtc
|
|
|
|
# Disable noisy checks by default
|
|
ifeq ($(findstring 1,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
|
|
DTC_FLAGS += -Wno-unit_address_vs_reg \
|
|
-Wno-unit_address_format \
|
|
-Wno-avoid_unnecessary_addr_size \
|
|
-Wno-alias_paths \
|
|
-Wno-graph_child_address \
|
|
-Wno-graph_port \
|
|
-Wno-simple_bus_reg \
|
|
-Wno-unique_unit_address \
|
|
-Wno-pci_device_reg
|
|
endif
|
|
|
|
ifneq ($(findstring 2,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
|
|
DTC_FLAGS += -Wnode_name_chars_strict \
|
|
-Wproperty_name_chars_strict
|
|
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'; \
|
|
) > $@
|
|
|
|
show_dtc_error = \
|
|
( \
|
|
cat $1; \
|
|
for err in "$$(cat $1 | grep 'Error:')"; do \
|
|
echo "See more detail error as below:"; \
|
|
cat $$(echo $$err | cut -d':' -f2) \
|
|
| awk '{printf("ERROR: %6d %s\n"), NR, $$0}' \
|
|
| head -n $$(echo $$err | grep -Eo ':[0-9]+' | cut -d':' -f2) \
|
|
| tail -n 2; \
|
|
done; \
|
|
rm $1; \
|
|
false; \
|
|
)
|
|
|
|
$(obj)/%.dtb.S: $(obj)/%.dtb FORCE
|
|
$(call if_changed,dt_S_dtb)
|
|
|
|
quiet_cmd_dtc = DTC $@
|
|
cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
|
|
$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
|
|
$(DTC) -@ -O dtb -o $@ -b 0 \
|
|
$(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \
|
|
-d $(depfile).dtc.tmp $(dtc-tmp) 2>$@.dtout || $(call show_dtc_error, $@.dtout) ;\
|
|
$(DTC) -q -O dts -I dtb -o $@.reverse.dts $@ ; \
|
|
cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
|
|
|
|
$(obj)/%.dtb: $(src)/%.dts $(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 $1; 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 $(filter-out FORCE,$^) | \
|
|
bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
|
|
(rm -f $@ ; false)
|
|
|
|
# Lzma
|
|
# ---------------------------------------------------------------------------
|
|
|
|
quiet_cmd_lzma = LZMA $@
|
|
cmd_lzma = (cat $(filter-out FORCE,$^) | \
|
|
lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
|
|
(rm -f $@ ; false)
|
|
|
|
quiet_cmd_lzo = LZO $@
|
|
cmd_lzo = (cat $(filter-out FORCE,$^) | \
|
|
lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
|
|
(rm -f $@ ; false)
|
|
|
|
quiet_cmd_lz4 = LZ4 $@
|
|
cmd_lz4 = (cat $(filter-out FORCE,$^) | \
|
|
lz4 -l -12 --favor-decSpeed stdin stdout && \
|
|
$(call size_append, $(filter-out FORCE,$^))) > $@ || \
|
|
(rm -f $@ ; false)
|
|
|
|
# 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)'
|
|
UIMAGE_IN ?= $<
|
|
UIMAGE_OUT ?= $@
|
|
|
|
quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT)
|
|
cmd_uimage = $(CONFIG_SHELL) $(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 $(UIMAGE_IN) $(UIMAGE_OUT)
|
|
|
|
# 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 $(filter-out FORCE,$^) | \
|
|
sh $(srctree)/scripts/xz_wrap.sh && \
|
|
$(call size_append, $(filter-out FORCE,$^))) > $@ || \
|
|
(rm -f $@ ; false)
|
|
|
|
quiet_cmd_xzmisc = XZMISC $@
|
|
cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
|
|
xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
|
|
(rm -f $@ ; false)
|
|
|
|
# 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
|
|
(set -e; \
|
|
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
|