| | 1 | # SPDX-License-Identifier: GPL-2.0 |
| | 2 | # Backward compatibility |
| | 3 | asflags-y += $(EXTRA_AFLAGS) |
| | 4 | ccflags-y += $(EXTRA_CFLAGS) |
| | 5 | cppflags-y += $(EXTRA_CPPFLAGS) |
| | 6 | ldflags-y += $(EXTRA_LDFLAGS) |
| | 7 | |
| | 8 | # flags that take effect in current and sub directories |
| | 9 | KBUILD_AFLAGS += $(subdir-asflags-y) |
| | 10 | KBUILD_CFLAGS += $(subdir-ccflags-y) |
| | 11 | KBUILD_RUSTFLAGS += $(subdir-rustflags-y) |
| | 12 | |
| | 13 | # Figure out what we need to build from the various variables |
| | 14 | # =========================================================================== |
| | 15 | |
| | 16 | # When an object is listed to be built compiled-in and modular, |
| | 17 | # only build the compiled-in version |
| | 18 | obj-m := $(filter-out $(obj-y),$(obj-m)) |
| | 19 | |
| | 20 | # Libraries are always collected in one lib file. |
| | 21 | # Filter out objects already built-in |
| | 22 | lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m))) |
| | 23 | |
| | 24 | # Subdirectories we need to descend into |
| | 25 | subdir-ym := $(sort $(subdir-y) $(subdir-m) \ |
| | 26 | $(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m)))) |
| | 27 | |
| | 28 | # Handle objects in subdirs: |
| | 29 | # - If we encounter foo/ in $(obj-y), replace it by foo/built-in.a and |
| | 30 | # foo/modules.order |
| | 31 | # - If we encounter foo/ in $(obj-m), replace it by foo/modules.order |
| | 32 | # |
| | 33 | # Generate modules.order to determine modorder. Unfortunately, we don't have |
| | 34 | # information about ordering between -y and -m subdirs. Just put -y's first. |
| | 35 | |
| | 36 | ifdef need-modorder |
| | 37 | obj-m := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m)) |
| | 38 | else |
| | 39 | obj-m := $(filter-out %/, $(obj-m)) |
| | 40 | endif |
| | 41 | |
| | 42 | ifdef need-builtin |
| | 43 | obj-y := $(patsubst %/, %/built-in.a, $(obj-y)) |
| | 44 | else |
| | 45 | obj-y := $(filter-out %/, $(obj-y)) |
| | 46 | endif |
| | 47 | |
| | 48 | # Expand $(foo-objs) $(foo-y) etc. by replacing their individuals |
| | 49 | suffix-search = $(strip $(foreach s, $3, $($(1:%$(strip $2)=%$s)))) |
| | 50 | # List composite targets that are constructed by combining other targets |
| | 51 | multi-search = $(sort $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $m))) |
| | 52 | # List primitive targets that are compiled from source files |
| | 53 | real-search = $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $(call suffix-search, $m, $2, $3), $m)) |
| | 54 | |
| | 55 | # If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object |
| | 56 | multi-obj-y := $(call multi-search, $(obj-y), .o, -objs -y) |
| | 57 | multi-obj-m := $(call multi-search, $(obj-m), .o, -objs -y -m) |
| | 58 | multi-obj-ym := $(multi-obj-y) $(multi-obj-m) |
| | 59 | |
| | 60 | # Replace multi-part objects by their individual parts, |
| | 61 | # including built-in.a from subdirectories |
| | 62 | real-obj-y := $(call real-search, $(obj-y), .o, -objs -y) |
| | 63 | real-obj-m := $(call real-search, $(obj-m), .o, -objs -y -m) |
| | 64 | |
| | 65 | always-y += $(always-m) |
| | 66 | |
| | 67 | # hostprogs-always-y += foo |
| | 68 | # ... is a shorthand for |
| | 69 | # hostprogs += foo |
| | 70 | # always-y += foo |
| | 71 | hostprogs += $(hostprogs-always-y) $(hostprogs-always-m) |
| | 72 | always-y += $(hostprogs-always-y) $(hostprogs-always-m) |
| | 73 | |
| | 74 | # userprogs-always-y is likewise. |
| | 75 | userprogs += $(userprogs-always-y) $(userprogs-always-m) |
| | 76 | always-y += $(userprogs-always-y) $(userprogs-always-m) |
| | 77 | |
| | 78 | # DTB |
| | 79 | # If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built |
| | 80 | dtb-$(CONFIG_OF_ALL_DTBS) += $(dtb-) |
| | 81 | |
| | 82 | # Composite DTB (i.e. DTB constructed by overlay) |
| | 83 | multi-dtb-y := $(call multi-search, $(dtb-y), .dtb, -dtbs) |
| | 84 | # Primitive DTB compiled from *.dts |
| | 85 | real-dtb-y := $(call real-search, $(dtb-y), .dtb, -dtbs) |
| | 86 | # Base DTB that overlay is applied onto (each first word of $(*-dtbs) expansion) |
| | 87 | base-dtb-y := $(foreach m, $(multi-dtb-y), $(firstword $(call suffix-search, $m, .dtb, -dtbs))) |
| | 88 | |
| | 89 | always-y += $(dtb-y) |
| | 90 | |
| | 91 | # Add subdir path |
| | 92 | |
| | 93 | ifneq ($(obj),.) |
| | 94 | extra-y := $(addprefix $(obj)/,$(extra-y)) |
| | 95 | always-y := $(addprefix $(obj)/,$(always-y)) |
| | 96 | targets := $(addprefix $(obj)/,$(targets)) |
| | 97 | obj-m := $(addprefix $(obj)/,$(obj-m)) |
| | 98 | lib-y := $(addprefix $(obj)/,$(lib-y)) |
| | 99 | real-obj-y := $(addprefix $(obj)/,$(real-obj-y)) |
| | 100 | real-obj-m := $(addprefix $(obj)/,$(real-obj-m)) |
| | 101 | multi-obj-m := $(addprefix $(obj)/, $(multi-obj-m)) |
| | 102 | multi-dtb-y := $(addprefix $(obj)/, $(multi-dtb-y)) |
| | 103 | real-dtb-y := $(addprefix $(obj)/, $(real-dtb-y)) |
| | 104 | subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) |
| | 105 | endif |
| | 106 | |
| | 107 | # Finds the multi-part object the current object will be linked into. |
| | 108 | # If the object belongs to two or more multi-part objects, list them all. |
| | 109 | modname-multi = $(sort $(foreach m,$(multi-obj-ym),\ |
| | 110 | $(if $(filter $*.o, $(call suffix-search, $m, .o, -objs -y -m)),$(m:.o=)))) |
| | 111 | |
| | 112 | __modname = $(or $(modname-multi),$(basetarget)) |
| | 113 | |
| | 114 | modname = $(subst $(space),:,$(__modname)) |
| | 115 | modfile = $(addprefix $(obj)/,$(__modname)) |
| | 116 | |
| | 117 | # target with $(obj)/ and its suffix stripped |
| | 118 | target-stem = $(basename $(patsubst $(obj)/%,%,$@)) |
| | 119 | |
| | 120 | # These flags are needed for modversions and compiling, so we define them here |
| | 121 | # $(modname_flags) defines KBUILD_MODNAME as the name of the module it will |
| | 122 | # end up in (or would, if it gets compiled in) |
| | 123 | name-fix-token = $(subst $(comma),_,$(subst -,_,$1)) |
| | 124 | name-fix = $(call stringify,$(call name-fix-token,$1)) |
| | 125 | basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget)) |
| | 126 | modname_flags = -DKBUILD_MODNAME=$(call name-fix,$(modname)) \ |
| | 127 | -D__KBUILD_MODNAME=kmod_$(call name-fix-token,$(modname)) |
| | 128 | modfile_flags = -DKBUILD_MODFILE=$(call stringify,$(modfile)) |
| | 129 | |
| | 130 | _c_flags = $(filter-out $(CFLAGS_REMOVE_$(target-stem).o), \ |
| | 131 | $(filter-out $(ccflags-remove-y), \ |
| | 132 | $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(ccflags-y)) \ |
| | 133 | $(CFLAGS_$(target-stem).o)) |
| | 134 | _rust_flags = $(filter-out $(RUSTFLAGS_REMOVE_$(target-stem).o), \ |
| | 135 | $(filter-out $(rustflags-remove-y), \ |
| | 136 | $(KBUILD_RUSTFLAGS) $(rustflags-y)) \ |
| | 137 | $(RUSTFLAGS_$(target-stem).o)) |
| | 138 | _a_flags = $(filter-out $(AFLAGS_REMOVE_$(target-stem).o), \ |
| | 139 | $(filter-out $(asflags-remove-y), \ |
| | 140 | $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(asflags-y)) \ |
| | 141 | $(AFLAGS_$(target-stem).o)) |
| | 142 | _cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(target-stem).lds) |
| | 143 | |
| | 144 | # |
| | 145 | # Enable gcov profiling flags for a file, directory or for all files depending |
| | 146 | # on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL |
| | 147 | # (in this order) |
| | 148 | # |
| | 149 | ifeq ($(CONFIG_GCOV_KERNEL),y) |
| | 150 | _c_flags += $(if $(patsubst n%,, \ |
| | 151 | $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \ |
| | 152 | $(CFLAGS_GCOV)) |
| | 153 | endif |
| | 154 | |
| | 155 | # |
| | 156 | # Enable address sanitizer flags for kernel except some files or directories |
| | 157 | # we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE) |
| | 158 | # |
| | 159 | ifeq ($(CONFIG_KASAN),y) |
| | 160 | ifneq ($(CONFIG_KASAN_HW_TAGS),y) |
| | 161 | _c_flags += $(if $(patsubst n%,, \ |
| | 162 | $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \ |
| | 163 | $(CFLAGS_KASAN), $(CFLAGS_KASAN_NOSANITIZE)) |
| | 164 | endif |
| | 165 | endif |
| | 166 | |
| | 167 | ifeq ($(CONFIG_KMSAN),y) |
| | 168 | _c_flags += $(if $(patsubst n%,, \ |
| | 169 | $(KMSAN_SANITIZE_$(basetarget).o)$(KMSAN_SANITIZE)y), \ |
| | 170 | $(CFLAGS_KMSAN)) |
| | 171 | _c_flags += $(if $(patsubst n%,, \ |
| | 172 | $(KMSAN_ENABLE_CHECKS_$(basetarget).o)$(KMSAN_ENABLE_CHECKS)y), \ |
| | 173 | , -mllvm -msan-disable-checks=1) |
| | 174 | endif |
| | 175 | |
| | 176 | ifeq ($(CONFIG_UBSAN),y) |
| | 177 | _c_flags += $(if $(patsubst n%,, \ |
| | 178 | $(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \ |
| | 179 | $(CFLAGS_UBSAN)) |
| | 180 | endif |
| | 181 | |
| | 182 | ifeq ($(CONFIG_KCOV),y) |
| | 183 | _c_flags += $(if $(patsubst n%,, \ |
| | 184 | $(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)$(CONFIG_KCOV_INSTRUMENT_ALL)), \ |
| | 185 | $(CFLAGS_KCOV)) |
| | 186 | endif |
| | 187 | |
| | 188 | # |
| | 189 | # Enable KCSAN flags except some files or directories we don't want to check |
| | 190 | # (depends on variables KCSAN_SANITIZE_obj.o, KCSAN_SANITIZE) |
| | 191 | # |
| | 192 | ifeq ($(CONFIG_KCSAN),y) |
| | 193 | _c_flags += $(if $(patsubst n%,, \ |
| | 194 | $(KCSAN_SANITIZE_$(basetarget).o)$(KCSAN_SANITIZE)y), \ |
| | 195 | $(CFLAGS_KCSAN)) |
| | 196 | # Some uninstrumented files provide implied barriers required to avoid false |
| | 197 | # positives: set KCSAN_INSTRUMENT_BARRIERS for barrier instrumentation only. |
| | 198 | _c_flags += $(if $(patsubst n%,, \ |
| | 199 | $(KCSAN_INSTRUMENT_BARRIERS_$(basetarget).o)$(KCSAN_INSTRUMENT_BARRIERS)n), \ |
| | 200 | -D__KCSAN_INSTRUMENT_BARRIERS__) |
| | 201 | endif |
| | 202 | |
| | 203 | # $(srctree)/$(src) for including checkin headers from generated source files |
| | 204 | # $(objtree)/$(obj) for including generated headers from checkin source files |
| | 205 | ifeq ($(KBUILD_EXTMOD),) |
| | 206 | ifdef building_out_of_srctree |
| | 207 | _c_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj) |
| | 208 | _a_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj) |
| | 209 | _cpp_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj) |
| | 210 | endif |
| | 211 | endif |
| | 212 | |
| | 213 | part-of-module = $(if $(filter $(basename $@).o, $(real-obj-m)),y) |
| | 214 | quiet_modtag = $(if $(part-of-module),[M], ) |
| | 215 | |
| | 216 | modkern_cflags = \ |
| | 217 | $(if $(part-of-module), \ |
| | 218 | $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ |
| | 219 | $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL) $(modfile_flags)) |
| | 220 | |
| | 221 | modkern_rustflags = \ |
| | 222 | $(if $(part-of-module), \ |
| | 223 | $(KBUILD_RUSTFLAGS_MODULE) $(RUSTFLAGS_MODULE), \ |
| | 224 | $(KBUILD_RUSTFLAGS_KERNEL) $(RUSTFLAGS_KERNEL)) |
| | 225 | |
| | 226 | modkern_aflags = $(if $(part-of-module), \ |
| | 227 | $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE), \ |
| | 228 | $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)) |
| | 229 | |
| | 230 | c_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
| | 231 | -include $(srctree)/include/linux/compiler_types.h \ |
| | 232 | $(_c_flags) $(modkern_cflags) \ |
| | 233 | $(basename_flags) $(modname_flags) |
| | 234 | |
| | 235 | rust_flags = $(_rust_flags) $(modkern_rustflags) @$(objtree)/include/generated/rustc_cfg |
| | 236 | |
| | 237 | a_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
| | 238 | $(_a_flags) $(modkern_aflags) |
| | 239 | |
| | 240 | cpp_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
| | 241 | $(_cpp_flags) |
| | 242 | |
| | 243 | ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) |
| | 244 | |
| | 245 | DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes |
| | 246 | |
| | 247 | dtc_cpp_flags = -Wp,-MMD,$(depfile).pre.tmp -nostdinc \ |
| | 248 | $(addprefix -I,$(DTC_INCLUDE)) \ |
| | 249 | -undef -D__DTS__ |
| | 250 | |
| | 251 | ifdef CONFIG_OBJTOOL |
| | 252 | |
| | 253 | objtool := $(objtree)/tools/objtool/objtool |
| | 254 | |
| | 255 | objtool-args-$(CONFIG_HAVE_JUMP_LABEL_HACK) += --hacks=jump_label |
| | 256 | objtool-args-$(CONFIG_HAVE_NOINSTR_HACK) += --hacks=noinstr |
| | 257 | objtool-args-$(CONFIG_X86_KERNEL_IBT) += --ibt |
| | 258 | objtool-args-$(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL) += --mcount |
| | 259 | objtool-args-$(CONFIG_UNWINDER_ORC) += --orc |
| | 260 | objtool-args-$(CONFIG_RETPOLINE) += --retpoline |
| | 261 | objtool-args-$(CONFIG_RETHUNK) += --rethunk |
| | 262 | objtool-args-$(CONFIG_SLS) += --sls |
| | 263 | objtool-args-$(CONFIG_STACK_VALIDATION) += --stackval |
| | 264 | objtool-args-$(CONFIG_HAVE_STATIC_CALL_INLINE) += --static-call |
| | 265 | objtool-args-$(CONFIG_HAVE_UACCESS_VALIDATION) += --uaccess |
| | 266 | objtool-args-$(CONFIG_GCOV_KERNEL) += --no-unreachable |
| | 267 | |
| | 268 | objtool-args = $(objtool-args-y) \ |
| | 269 | $(if $(delay-objtool), --link) \ |
| | 270 | $(if $(part-of-module), --module) |
| | 271 | |
| | 272 | delay-objtool := $(or $(CONFIG_LTO_CLANG),$(CONFIG_X86_KERNEL_IBT)) |
| | 273 | |
| | 274 | cmd_objtool = $(if $(objtool-enabled), ; $(objtool) $(objtool-args) $@) |
| | 275 | cmd_gen_objtooldep = $(if $(objtool-enabled), { echo ; echo '$@: $$(wildcard $(objtool))' ; } >> $(dot-target).cmd) |
| | 276 | |
| | 277 | endif # CONFIG_OBJTOOL |
| | 278 | |
| | 279 | # Useful for describing the dependency of composite objects |
| | 280 | # Usage: |
| | 281 | # $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add) |
| | 282 | define multi_depend |
| | 283 | $(foreach m, $1, \ |
| | 284 | $(eval $m: \ |
| | 285 | $(addprefix $(obj)/, $(call suffix-search, $(patsubst $(obj)/%,%,$m), $2, $3)))) |
| | 286 | endef |
| | 287 | |
| | 288 | # Copy a file |
| | 289 | # =========================================================================== |
| | 290 | # 'cp' preserves permissions. If you use it to copy a file in read-only srctree, |
| | 291 | # the copy would be read-only as well, leading to an error when executing the |
| | 292 | # rule next time. Use 'cat' instead in order to generate a writable file. |
| | 293 | quiet_cmd_copy = COPY $@ |
| | 294 | cmd_copy = cat $< > $@ |
| | 295 | |
| | 296 | $(obj)/%: $(src)/%_shipped |
| | 297 | $(call cmd,copy) |
| | 298 | |
| | 299 | # Commands useful for building a boot image |
| | 300 | # =========================================================================== |
| | 301 | # |
| | 302 | # Use as following: |
| | 303 | # |
| | 304 | # target: source(s) FORCE |
| | 305 | # $(if_changed,ld/objcopy/gzip) |
| | 306 | # |
| | 307 | # and add target to 'targets' so that we know we have to |
| | 308 | # read in the saved command line |
| | 309 | |
| | 310 | # Linking |
| | 311 | # --------------------------------------------------------------------------- |
| | 312 | |
| | 313 | quiet_cmd_ld = LD $@ |
| | 314 | cmd_ld = $(LD) $(ld_flags) $(real-prereqs) -o $@ |
| | 315 | |
| | 316 | # Archive |
| | 317 | # --------------------------------------------------------------------------- |
| | 318 | |
| | 319 | quiet_cmd_ar = AR $@ |
| | 320 | cmd_ar = rm -f $@; $(AR) cDPrsT $@ $(real-prereqs) |
| | 321 | |
| | 322 | # Objcopy |
| | 323 | # --------------------------------------------------------------------------- |
| | 324 | |
| | 325 | quiet_cmd_objcopy = OBJCOPY $@ |
| | 326 | cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ |
| | 327 | |
| | 328 | # Gzip |
| | 329 | # --------------------------------------------------------------------------- |
| | 330 | |
| | 331 | quiet_cmd_gzip = GZIP $@ |
| | 332 | cmd_gzip = cat $(real-prereqs) | $(KGZIP) -n -f -9 > $@ |
| | 333 | |
| | 334 | # DTC |
| | 335 | # --------------------------------------------------------------------------- |
| | 336 | DTC ?= $(objtree)/scripts/dtc/dtc |
| | 337 | DTC_FLAGS += -Wno-interrupt_provider |
| | 338 | |
| | 339 | # Disable noisy checks by default |
| | 340 | ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),) |
| | 341 | DTC_FLAGS += -Wno-unit_address_vs_reg \ |
| | 342 | -Wno-avoid_unnecessary_addr_size \ |
| | 343 | -Wno-alias_paths \ |
| | 344 | -Wno-graph_child_address \ |
| | 345 | -Wno-simple_bus_reg \ |
| | 346 | -Wno-unique_unit_address |
| | 347 | endif |
| | 348 | |
| | 349 | ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),) |
| | 350 | DTC_FLAGS += -Wnode_name_chars_strict \ |
| | 351 | -Wproperty_name_chars_strict \ |
| | 352 | -Winterrupt_provider |
| | 353 | endif |
| | 354 | |
| | 355 | DTC_FLAGS += $(DTC_FLAGS_$(basetarget)) |
| | 356 | |
| | 357 | # Set -@ if the target is a base DTB that overlay is applied onto |
| | 358 | DTC_FLAGS += $(if $(filter $(patsubst $(obj)/%,%,$@), $(base-dtb-y)), -@) |
| | 359 | |
| | 360 | # Generate an assembly file to wrap the output of the device tree compiler |
| | 361 | quiet_cmd_dt_S_dtb= DTB $@ |
| | 362 | cmd_dt_S_dtb= \ |
| | 363 | { \ |
| | 364 | echo '\#include <asm-generic/vmlinux.lds.h>'; \ |
| | 365 | echo '.section .dtb.init.rodata,"a"'; \ |
| | 366 | echo '.balign STRUCT_ALIGNMENT'; \ |
| | 367 | echo '.global __dtb_$(subst -,_,$(*F))_begin'; \ |
| | 368 | echo '__dtb_$(subst -,_,$(*F))_begin:'; \ |
| | 369 | echo '.incbin "$<" '; \ |
| | 370 | echo '__dtb_$(subst -,_,$(*F))_end:'; \ |
| | 371 | echo '.global __dtb_$(subst -,_,$(*F))_end'; \ |
| | 372 | echo '.balign STRUCT_ALIGNMENT'; \ |
| | 373 | } > $@ |
| | 374 | |
| | 375 | $(obj)/%.dtb.S: $(obj)/%.dtb FORCE |
| | 376 | $(call if_changed,dt_S_dtb) |
| | 377 | |
| | 378 | quiet_cmd_dtc = DTC $@ |
| | 379 | cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ |
| | 380 | $(DTC) -o $@ -b 0 \ |
| | 381 | $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \ |
| | 382 | -d $(depfile).dtc.tmp $(dtc-tmp) ; \ |
| | 383 | cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) |
| | 384 | |
| | 385 | quiet_cmd_fdtoverlay = DTOVL $@ |
| | 386 | cmd_fdtoverlay = $(objtree)/scripts/dtc/fdtoverlay -o $@ -i $(real-prereqs) |
| | 387 | |
| | 388 | $(multi-dtb-y): FORCE |
| | 389 | $(call if_changed,fdtoverlay) |
| | 390 | $(call multi_depend, $(multi-dtb-y), .dtb, -dtbs) |
| | 391 | |
| | 392 | ifneq ($(CHECK_DTBS)$(CHECK_DT_BINDING),) |
| | 393 | DT_CHECKER ?= dt-validate |
| | 394 | DT_CHECKER_FLAGS ?= $(if $(DT_SCHEMA_FILES),-l $(DT_SCHEMA_FILES),-m) |
| | 395 | DT_BINDING_DIR := Documentation/devicetree/bindings |
| | 396 | DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.json |
| | 397 | |
| | 398 | quiet_cmd_dtb = DTC_CHK $@ |
| | 399 | cmd_dtb = $(cmd_dtc) ; $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ || true |
| | 400 | else |
| | 401 | quiet_cmd_dtb = $(quiet_cmd_dtc) |
| | 402 | cmd_dtb = $(cmd_dtc) |
| | 403 | endif |
| | 404 | |
| | 405 | $(obj)/%.dtb: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE |
| | 406 | $(call if_changed_dep,dtb) |
| | 407 | |
| | 408 | $(obj)/%.dtbo: $(src)/%.dts $(DTC) FORCE |
| | 409 | $(call if_changed_dep,dtc) |
| | 410 | |
| | 411 | dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp) |
| | 412 | |
| | 413 | # Bzip2 |
| | 414 | # --------------------------------------------------------------------------- |
| | 415 | |
| | 416 | # Bzip2 and LZMA do not include size in file... so we have to fake that; |
| | 417 | # append the size as a 32-bit littleendian number as gzip does. |
| | 418 | size_append = printf $(shell \ |
| | 419 | dec_size=0; \ |
| | 420 | for F in $(real-prereqs); do \ |
| | 421 | fsize=$$($(CONFIG_SHELL) $(srctree)/scripts/file-size.sh $$F); \ |
| | 422 | dec_size=$$(expr $$dec_size + $$fsize); \ |
| | 423 | done; \ |
| | 424 | printf "%08x\n" $$dec_size | \ |
| | 425 | sed 's/\(..\)/\1 /g' | { \ |
| | 426 | read ch0 ch1 ch2 ch3; \ |
| | 427 | for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \ |
| | 428 | printf '%s%03o' '\\' $$((0x$$ch)); \ |
| | 429 | done; \ |
| | 430 | } \ |
| | 431 | ) |
| | 432 | |
| | 433 | quiet_cmd_file_size = GEN $@ |
| | 434 | cmd_file_size = $(size_append) > $@ |
| | 435 | |
| | 436 | quiet_cmd_bzip2 = BZIP2 $@ |
| | 437 | cmd_bzip2 = cat $(real-prereqs) | $(KBZIP2) -9 > $@ |
| | 438 | |
| | 439 | quiet_cmd_bzip2_with_size = BZIP2 $@ |
| | 440 | cmd_bzip2_with_size = { cat $(real-prereqs) | $(KBZIP2) -9; $(size_append); } > $@ |
| | 441 | |
| | 442 | # Lzma |
| | 443 | # --------------------------------------------------------------------------- |
| | 444 | |
| | 445 | quiet_cmd_lzma = LZMA $@ |
| | 446 | cmd_lzma = cat $(real-prereqs) | $(LZMA) -9 > $@ |
| | 447 | |
| | 448 | quiet_cmd_lzma_with_size = LZMA $@ |
| | 449 | cmd_lzma_with_size = { cat $(real-prereqs) | $(LZMA) -9; $(size_append); } > $@ |
| | 450 | |
| | 451 | quiet_cmd_lzo = LZO $@ |
| | 452 | cmd_lzo = cat $(real-prereqs) | $(KLZOP) -9 > $@ |
| | 453 | |
| | 454 | quiet_cmd_lzo_with_size = LZO $@ |
| | 455 | cmd_lzo_with_size = { cat $(real-prereqs) | $(KLZOP) -9; $(size_append); } > $@ |
| | 456 | |
| | 457 | quiet_cmd_lz4 = LZ4 $@ |
| | 458 | cmd_lz4 = cat $(real-prereqs) | $(LZ4) -l -c1 stdin stdout > $@ |
| | 459 | |
| | 460 | quiet_cmd_lz4_with_size = LZ4 $@ |
| | 461 | cmd_lz4_with_size = { cat $(real-prereqs) | $(LZ4) -l -c1 stdin stdout; \ |
| | 462 | $(size_append); } > $@ |
| | 463 | |
| | 464 | # U-Boot mkimage |
| | 465 | # --------------------------------------------------------------------------- |
| | 466 | |
| | 467 | MKIMAGE := $(srctree)/scripts/mkuboot.sh |
| | 468 | |
| | 469 | # SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces |
| | 470 | # the number of overrides in arch makefiles |
| | 471 | UIMAGE_ARCH ?= $(SRCARCH) |
| | 472 | UIMAGE_COMPRESSION ?= $(or $(2),none) |
| | 473 | UIMAGE_OPTS-y ?= |
| | 474 | UIMAGE_TYPE ?= kernel |
| | 475 | UIMAGE_LOADADDR ?= arch_must_set_this |
| | 476 | UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR) |
| | 477 | UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)' |
| | 478 | |
| | 479 | quiet_cmd_uimage = UIMAGE $@ |
| | 480 | cmd_uimage = $(BASH) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \ |
| | 481 | -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \ |
| | 482 | -T $(UIMAGE_TYPE) \ |
| | 483 | -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \ |
| | 484 | -n $(UIMAGE_NAME) -d $< $@ |
| | 485 | |
| | 486 | # XZ |
| | 487 | # --------------------------------------------------------------------------- |
| | 488 | # Use xzkern to compress the kernel image and xzmisc to compress other things. |
| | 489 | # |
| | 490 | # xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage |
| | 491 | # of the kernel decompressor. A BCJ filter is used if it is available for |
| | 492 | # the target architecture. xzkern also appends uncompressed size of the data |
| | 493 | # using size_append. The .xz format has the size information available at |
| | 494 | # the end of the file too, but it's in more complex format and it's good to |
| | 495 | # avoid changing the part of the boot code that reads the uncompressed size. |
| | 496 | # Note that the bytes added by size_append will make the xz tool think that |
| | 497 | # the file is corrupt. This is expected. |
| | 498 | # |
| | 499 | # xzmisc doesn't use size_append, so it can be used to create normal .xz |
| | 500 | # files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very |
| | 501 | # big dictionary would increase the memory usage too much in the multi-call |
| | 502 | # decompression mode. A BCJ filter isn't used either. |
| | 503 | quiet_cmd_xzkern = XZKERN $@ |
| | 504 | cmd_xzkern = cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh > $@ |
| | 505 | |
| | 506 | quiet_cmd_xzkern_with_size = XZKERN $@ |
| | 507 | cmd_xzkern_with_size = { cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh; \ |
| | 508 | $(size_append); } > $@ |
| | 509 | |
| | 510 | quiet_cmd_xzmisc = XZMISC $@ |
| | 511 | cmd_xzmisc = cat $(real-prereqs) | $(XZ) --check=crc32 --lzma2=dict=1MiB > $@ |
| | 512 | |
| | 513 | # ZSTD |
| | 514 | # --------------------------------------------------------------------------- |
| | 515 | # Appends the uncompressed size of the data using size_append. The .zst |
| | 516 | # format has the size information available at the beginning of the file too, |
| | 517 | # but it's in a more complex format and it's good to avoid changing the part |
| | 518 | # of the boot code that reads the uncompressed size. |
| | 519 | # |
| | 520 | # Note that the bytes added by size_append will make the zstd tool think that |
| | 521 | # the file is corrupt. This is expected. |
| | 522 | # |
| | 523 | # zstd uses a maximum window size of 8 MB. zstd22 uses a maximum window size of |
| | 524 | # 128 MB. zstd22 is used for kernel compression because it is decompressed in a |
| | 525 | # single pass, so zstd doesn't need to allocate a window buffer. When streaming |
| | 526 | # decompression is used, like initramfs decompression, zstd22 should likely not |
| | 527 | # be used because it would require zstd to allocate a 128 MB buffer. |
| | 528 | |
| | 529 | quiet_cmd_zstd = ZSTD $@ |
| | 530 | cmd_zstd = cat $(real-prereqs) | $(ZSTD) -19 > $@ |
| | 531 | |
| | 532 | quiet_cmd_zstd22 = ZSTD22 $@ |
| | 533 | cmd_zstd22 = cat $(real-prereqs) | $(ZSTD) -22 --ultra > $@ |
| | 534 | |
| | 535 | quiet_cmd_zstd22_with_size = ZSTD22 $@ |
| | 536 | cmd_zstd22_with_size = { cat $(real-prereqs) | $(ZSTD) -22 --ultra; $(size_append); } > $@ |
| | 537 | |
| | 538 | # ASM offsets |
| | 539 | # --------------------------------------------------------------------------- |
| | 540 | |
| | 541 | # Default sed regexp - multiline due to syntax constraints |
| | 542 | # |
| | 543 | # Use [:space:] because LLVM's integrated assembler inserts <tab> around |
| | 544 | # the .ascii directive whereas GCC keeps the <space> as-is. |
| | 545 | define sed-offsets |
| | 546 | 's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; \ |
| | 547 | /^->/{s:->#\(.*\):/* \1 */:; \ |
| | 548 | s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ |
| | 549 | s:->::; p;}' |
| | 550 | endef |
| | 551 | |
| | 552 | # Use filechk to avoid rebuilds when a header changes, but the resulting file |
| | 553 | # does not |
| | 554 | define filechk_offsets |
| | 555 | echo "#ifndef $2"; \ |
| | 556 | echo "#define $2"; \ |
| | 557 | echo "/*"; \ |
| | 558 | echo " * DO NOT MODIFY."; \ |
| | 559 | echo " *"; \ |
| | 560 | echo " * This file was generated by Kbuild"; \ |
| | 561 | echo " */"; \ |
| | 562 | echo ""; \ |
| | 563 | sed -ne $(sed-offsets) < $<; \ |
| | 564 | echo ""; \ |
| | 565 | echo "#endif" |
| | 566 | endef |
projects / linux-2.6-block.git / blame_incremental