# 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_UBS
/*
 * Copyright (c) 2016 Wind River Systems; see
 * guts/COPYRIGHT for information.
 *
 * int mknodat(int dirfd, const char *path, mode_t mode, dev_t dev)
 *	int rc = -1;
 */

	rc = wrap___xmknodat(_MKNOD_VER, dirfd, path, mode, &dev);

/*	return rc;
 * }
 */
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-25 08:22:37 +0000
hanging 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 around # the .ascii directive whereas GCC keeps the 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