blob: 45b9aa3ca39e5ec165083eb91236710046a36d03 [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001# SPDX-License-Identifier: GPL-2.0
Sam Ravnborgf77bf012007-10-15 22:25:06 +02002# Backward compatibility
3asflags-y += $(EXTRA_AFLAGS)
4ccflags-y += $(EXTRA_CFLAGS)
5cppflags-y += $(EXTRA_CPPFLAGS)
6ldflags-y += $(EXTRA_LDFLAGS)
7
Cao jin8fdc3fb2017-10-09 11:49:11 +08008# flags that take effect in current and sub directories
Masahiro Yamada4e13d472017-10-10 20:43:21 +09009KBUILD_AFLAGS += $(subdir-asflags-y)
10KBUILD_CFLAGS += $(subdir-ccflags-y)
Sam Ravnborg720097d2009-04-19 11:04:26 +020011
Linus Torvalds1da177e2005-04-16 15:20:36 -070012# Figure out what we need to build from the various variables
13# ===========================================================================
14
15# When an object is listed to be built compiled-in and modular,
16# only build the compiled-in version
Linus Torvalds1da177e2005-04-16 15:20:36 -070017obj-m := $(filter-out $(obj-y),$(obj-m))
18
19# Libraries are always collected in one lib file.
20# Filter out objects already built-in
Linus Torvalds1da177e2005-04-16 15:20:36 -070021lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
22
Cao jin8fdc3fb2017-10-09 11:49:11 +080023# Determine modorder.
24# Unfortunately, we don't have information about ordering between -y
25# and -m subdirs. Just put -y's first.
26modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
28# Handle objects in subdirs
29# ---------------------------------------------------------------------------
Nicholas Pigginf49821e2018-02-11 00:25:04 +100030# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.a
Linus Torvalds1da177e2005-04-16 15:20:36 -070031# and add the directory to the list of dirs to descend into: $(subdir-y)
Masahiro Yamada38385f82014-04-28 16:26:18 +090032# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
Linus Torvalds1da177e2005-04-16 15:20:36 -070033# and add the directory to the list of dirs to descend into: $(subdir-m)
Linus Torvalds1da177e2005-04-16 15:20:36 -070034__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
35subdir-y += $(__subdir-y)
36__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
37subdir-m += $(__subdir-m)
Nicholas Pigginf49821e2018-02-11 00:25:04 +100038obj-y := $(patsubst %/, %/built-in.a, $(obj-y))
Linus Torvalds1da177e2005-04-16 15:20:36 -070039obj-m := $(filter-out %/, $(obj-m))
40
41# Subdirectories we need to descend into
Linus Torvalds1da177e2005-04-16 15:20:36 -070042subdir-ym := $(sort $(subdir-y) $(subdir-m))
43
Cao jin8fdc3fb2017-10-09 11:49:11 +080044# if $(foo-objs), $(foo-y), or $(foo-m) exists, foo.o is a composite object
Linus Torvalds1da177e2005-04-16 15:20:36 -070045multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
Michal Marekcf4f2192015-10-27 14:02:24 +010046multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))), $(m))))
Linus Torvalds1da177e2005-04-16 15:20:36 -070047multi-used := $(multi-used-y) $(multi-used-m)
48single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
49
Sam Ravnborgf5fb9762007-09-15 08:55:39 +020050# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
51# tell kbuild to descend
Nicholas Pigginf49821e2018-02-11 00:25:04 +100052subdir-obj-y := $(filter %/built-in.a, $(obj-y))
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Masahiro Yamadaf98fe472018-03-19 20:26:08 +090054# Replace multi-part objects by their individual parts,
55# including built-in.a from subdirectories
56real-obj-y := $(foreach m, $(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
Masahiro Yamadaf5f33682018-03-19 20:26:07 +090057real-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)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Masahiro Yamada7e7962d2017-11-05 14:30:53 +090059# DTB
60# If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built
61extra-y += $(dtb-y)
62extra-$(CONFIG_OF_ALL_DTBS) += $(dtb-)
63
Linus Torvalds1da177e2005-04-16 15:20:36 -070064# Add subdir path
65
66extra-y := $(addprefix $(obj)/,$(extra-y))
67always := $(addprefix $(obj)/,$(always))
68targets := $(addprefix $(obj)/,$(targets))
Tejun Heo551559e2007-12-07 21:04:30 +090069modorder := $(addprefix $(obj)/,$(modorder))
Linus Torvalds1da177e2005-04-16 15:20:36 -070070obj-m := $(addprefix $(obj)/,$(obj-m))
71lib-y := $(addprefix $(obj)/,$(lib-y))
72subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
Masahiro Yamadaf5f33682018-03-19 20:26:07 +090073real-obj-y := $(addprefix $(obj)/,$(real-obj-y))
74real-obj-m := $(addprefix $(obj)/,$(real-obj-m))
Linus Torvalds1da177e2005-04-16 15:20:36 -070075single-used-m := $(addprefix $(obj)/,$(single-used-m))
Linus Torvalds1da177e2005-04-16 15:20:36 -070076multi-used-m := $(addprefix $(obj)/,$(multi-used-m))
Linus Torvalds1da177e2005-04-16 15:20:36 -070077subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
Masahiro Yamadac0152e92018-03-19 18:01:27 +090079# Finds the multi-part object the current object will be linked into.
80# If the object belongs to two or more multi-part objects, all of them are
81# concatenated with a colon separator.
82modname-multi = $(subst $(space),:,$(sort $(foreach m,$(multi-used),\
83 $(if $(filter $*.o, $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$(m:.o=)))))
84
85modname = $(if $(modname-multi),$(modname-multi),$(basetarget))
86
Linus Torvalds1da177e2005-04-16 15:20:36 -070087# These flags are needed for modversions and compiling, so we define them here
Cao jin8fdc3fb2017-10-09 11:49:11 +080088# $(modname_flags) defines KBUILD_MODNAME as the name of the module it will
Linus Torvalds1da177e2005-04-16 15:20:36 -070089# end up in (or would, if it gets compiled in)
Michal Marekb42841b2016-03-17 16:32:14 +010090name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote)
91basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
Masahiro Yamadaaeacb012018-03-19 18:01:24 +090092modname_flags = -DKBUILD_MODNAME=$(call name-fix,$(modname))
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Masahiro Yamada4e13d472017-10-10 20:43:21 +090094orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +010095 $(ccflags-y) $(CFLAGS_$(basetarget).o)
Steven Rostedt656ee822008-05-14 21:30:29 -040096_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
Masahiro Yamada4e13d472017-10-10 20:43:21 +090097orig_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +010098 $(asflags-y) $(AFLAGS_$(basetarget).o)
Heiko Carstensa7e137e2015-11-05 14:03:27 +010099_a_flags = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags))
Sam Ravnborgf77bf012007-10-15 22:25:06 +0200100_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700102#
103# Enable gcov profiling flags for a file, directory or for all files depending
104# on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
105# (in this order)
106#
107ifeq ($(CONFIG_GCOV_KERNEL),y)
108_c_flags += $(if $(patsubst n%,, \
109 $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
110 $(CFLAGS_GCOV))
111endif
112
Andrey Ryabinin0b24bec2015-02-13 14:39:17 -0800113#
114# Enable address sanitizer flags for kernel except some files or directories
115# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
116#
117ifeq ($(CONFIG_KASAN),y)
118_c_flags += $(if $(patsubst n%,, \
119 $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
Andrey Konovalov0e410e12018-02-06 15:36:00 -0800120 $(CFLAGS_KASAN), $(CFLAGS_KASAN_NOSANITIZE))
Andrey Ryabinin0b24bec2015-02-13 14:39:17 -0800121endif
122
Andrey Ryabininc6d30852016-01-20 15:00:55 -0800123ifeq ($(CONFIG_UBSAN),y)
124_c_flags += $(if $(patsubst n%,, \
125 $(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \
126 $(CFLAGS_UBSAN))
127endif
128
Dmitry Vyukov5c9a8752016-03-22 14:27:30 -0700129ifeq ($(CONFIG_KCOV),y)
130_c_flags += $(if $(patsubst n%,, \
Vegard Nossuma4691de2016-08-02 14:07:30 -0700131 $(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)$(CONFIG_KCOV_INSTRUMENT_ALL)), \
Dmitry Vyukov5c9a8752016-03-22 14:27:30 -0700132 $(CFLAGS_KCOV))
133endif
134
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135# If building the kernel in a separate objtree expand all occurrences
136# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
137
138ifeq ($(KBUILD_SRC),)
139__c_flags = $(_c_flags)
140__a_flags = $(_a_flags)
141__cpp_flags = $(_cpp_flags)
142else
143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144# -I$(obj) locates generated .h files
145# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
146# and locates generated .h files
147# FIXME: Replace both with specific CFLAGS* statements in the makefiles
Allan, Bruce W4607ebf2017-03-07 15:48:23 -0800148__c_flags = $(if $(obj),$(call addtree,-I$(src)) -I$(obj)) \
Arnd Bergmanndb547ef2016-06-15 17:45:47 +0200149 $(call flags,_c_flags)
150__a_flags = $(call flags,_a_flags)
151__cpp_flags = $(call flags,_cpp_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152endif
153
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100154c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
Masahiro Yamadaa95b37e2018-03-27 21:52:50 +0900155 -include $(srctree)/include/linux/compiler_types.h \
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100156 $(__c_flags) $(modkern_cflags) \
Michal Marekb42841b2016-03-17 16:32:14 +0100157 $(basename_flags) $(modname_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100159a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 $(__a_flags) $(modkern_aflags)
161
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100162cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
163 $(__cpp_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
Sam Ravnborgf77bf012007-10-15 22:25:06 +0200165ld_flags = $(LDFLAGS) $(ldflags-y)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
Masahiro Yamada50f9dda2017-07-25 11:23:36 +0900167DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes
168
Ian Campbellb0a4d8b2013-05-31 11:14:20 +0100169dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
Masahiro Yamada50f9dda2017-07-25 11:23:36 +0900170 $(addprefix -I,$(DTC_INCLUDE)) \
Stephen Warrene570d7c2013-02-12 15:03:37 -0700171 -undef -D__DTS__
172
Masahiro Yamadac8589d12014-08-19 16:34:20 +0900173# Useful for describing the dependency of composite objects
174# Usage:
175# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
176define multi_depend
177$(foreach m, $(notdir $1), \
178 $(eval $(obj)/$m: \
179 $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
180endef
181
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400182# LEX
183# ---------------------------------------------------------------------------
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400184quiet_cmd_flex = LEX $@
Masahiro Yamadaeea199b2018-01-12 00:51:52 +0900185 cmd_flex = $(LEX) -o$@ -L $<
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400186
Masahiro Yamada033dba22017-12-10 01:02:29 +0900187ifdef REGENERATE_PARSERS
Peter Foley58238c82011-07-31 14:45:40 -0400188.PRECIOUS: $(src)/%.lex.c_shipped
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400189$(src)/%.lex.c_shipped: $(src)/%.l
190 $(call cmd,flex)
Masahiro Yamada033dba22017-12-10 01:02:29 +0900191endif
192
193.PRECIOUS: $(obj)/%.lex.c
194$(filter %.lex.c,$(targets)): $(obj)/%.lex.c: $(src)/%.l FORCE
195 $(call if_changed,flex)
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400196
197# YACC
198# ---------------------------------------------------------------------------
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400199quiet_cmd_bison = YACC $@
Masahiro Yamadaeea199b2018-01-12 00:51:52 +0900200 cmd_bison = $(YACC) -o$@ -t -l $<
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400201
Masahiro Yamada033dba22017-12-10 01:02:29 +0900202ifdef REGENERATE_PARSERS
Peter Foley58238c82011-07-31 14:45:40 -0400203.PRECIOUS: $(src)/%.tab.c_shipped
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400204$(src)/%.tab.c_shipped: $(src)/%.y
205 $(call cmd,bison)
Masahiro Yamada033dba22017-12-10 01:02:29 +0900206endif
207
208.PRECIOUS: $(obj)/%.tab.c
209$(filter %.tab.c,$(targets)): $(obj)/%.tab.c: $(src)/%.y FORCE
210 $(call if_changed,bison)
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400211
212quiet_cmd_bison_h = YACC $@
Rob Herringe71de5e2018-02-27 17:26:41 -0600213 cmd_bison_h = bison -o/dev/null --defines=$@ -t -l $<
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400214
Masahiro Yamada033dba22017-12-10 01:02:29 +0900215ifdef REGENERATE_PARSERS
Peter Foley58238c82011-07-31 14:45:40 -0400216.PRECIOUS: $(src)/%.tab.h_shipped
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400217$(src)/%.tab.h_shipped: $(src)/%.y
218 $(call cmd,bison_h)
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400219endif
220
Masahiro Yamada033dba22017-12-10 01:02:29 +0900221.PRECIOUS: $(obj)/%.tab.h
222$(filter %.tab.h,$(targets)): $(obj)/%.tab.h: $(src)/%.y FORCE
223 $(call if_changed,bison_h)
224
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225# Shipped files
226# ===========================================================================
227
228quiet_cmd_shipped = SHIPPED $@
229cmd_shipped = cat $< > $@
230
Arnaud Lacombe991d76c2011-06-07 13:09:28 -0400231$(obj)/%: $(src)/%_shipped
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 $(call cmd,shipped)
233
234# Commands useful for building a boot image
235# ===========================================================================
Masahiro Yamada38385f82014-04-28 16:26:18 +0900236#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237# Use as following:
238#
239# target: source(s) FORCE
240# $(if_changed,ld/objcopy/gzip)
241#
Sam Ravnborg836caba2007-09-30 20:34:36 +0200242# and add target to extra-y so that we know we have to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243# read in the saved command line
244
245# Linking
246# ---------------------------------------------------------------------------
247
248quiet_cmd_ld = LD $@
Sam Ravnborgf77bf012007-10-15 22:25:06 +0200249cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
Masahiro Yamada38385f82014-04-28 16:26:18 +0900250 $(filter-out FORCE,$^) -o $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252# Objcopy
253# ---------------------------------------------------------------------------
254
255quiet_cmd_objcopy = OBJCOPY $@
256cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
257
258# Gzip
259# ---------------------------------------------------------------------------
260
261quiet_cmd_gzip = GZIP $@
Michal Marek6ae9ecb2011-03-31 15:47:55 +0200262cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700263 (rm -f $@ ; false)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Dirk Brandewieaab94332010-12-22 11:57:26 -0800265# DTC
266# ---------------------------------------------------------------------------
Rob Herring6b22b3d2016-02-11 16:28:13 -0600267DTC ?= $(objtree)/scripts/dtc/dtc
Dirk Brandewieaab94332010-12-22 11:57:26 -0800268
Rob Herringbc553982016-03-24 10:52:42 -0500269# Disable noisy checks by default
Masahiro Yamadaf7596252018-01-18 12:31:46 +0900270ifeq ($(findstring 1,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
Rob Herring8654cb82017-03-21 09:14:20 -0500271DTC_FLAGS += -Wno-unit_address_vs_reg \
Rob Herring8654cb82017-03-21 09:14:20 -0500272 -Wno-unit_address_format \
Rob Herring4fd98e32018-02-28 08:09:45 -0600273 -Wno-avoid_unnecessary_addr_size \
274 -Wno-alias_paths \
Rob Herring8654cb82017-03-21 09:14:20 -0500275 -Wno-pci_device_reg
Rob Herringbc553982016-03-24 10:52:42 -0500276endif
277
Masahiro Yamadaf7596252018-01-18 12:31:46 +0900278ifneq ($(findstring 2,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
Rob Herring8654cb82017-03-21 09:14:20 -0500279DTC_FLAGS += -Wnode_name_chars_strict \
280 -Wproperty_name_chars_strict
Dirk Brandewieaab94332010-12-22 11:57:26 -0800281endif
282
Frank Rowand331f7412017-04-25 17:09:53 -0700283DTC_FLAGS += $(DTC_FLAGS_$(basetarget))
284
Dirk Brandewieaab94332010-12-22 11:57:26 -0800285# Generate an assembly file to wrap the output of the device tree compiler
286quiet_cmd_dt_S_dtb= DTB $@
287cmd_dt_S_dtb= \
288( \
289 echo '\#include <asm-generic/vmlinux.lds.h>'; \
290 echo '.section .dtb.init.rodata,"a"'; \
291 echo '.balign STRUCT_ALIGNMENT'; \
James Hogan55fe6da2018-03-08 11:02:46 +0000292 echo '.global __dtb_$(subst -,_,$(*F))_begin'; \
293 echo '__dtb_$(subst -,_,$(*F))_begin:'; \
Dirk Brandewieaab94332010-12-22 11:57:26 -0800294 echo '.incbin "$<" '; \
James Hogan55fe6da2018-03-08 11:02:46 +0000295 echo '__dtb_$(subst -,_,$(*F))_end:'; \
296 echo '.global __dtb_$(subst -,_,$(*F))_end'; \
Dirk Brandewieaab94332010-12-22 11:57:26 -0800297 echo '.balign STRUCT_ALIGNMENT'; \
298) > $@
299
300$(obj)/%.dtb.S: $(obj)/%.dtb
301 $(call cmd,dt_S_dtb)
302
303quiet_cmd_dtc = DTC $@
Nathan Rossi77479b32015-03-30 14:39:08 +0200304cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
305 $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
Rob Herring6b22b3d2016-02-11 16:28:13 -0600306 $(DTC) -O dtb -o $@ -b 0 \
Masahiro Yamada50f9dda2017-07-25 11:23:36 +0900307 $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \
Ian Campbellb0a4d8b2013-05-31 11:14:20 +0100308 -d $(depfile).dtc.tmp $(dtc-tmp) ; \
309 cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
Rob Herringb8fc5b22018-02-27 17:49:57 -0600311$(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE
Stephen Warren90b335f2012-11-27 16:29:10 -0700312 $(call if_changed_dep,dtc)
313
Ian Campbellb0a4d8b2013-05-31 11:14:20 +0100314dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
Stephen Warren22435f32013-02-05 12:06:28 -0700315
Alain Knaffbc22c172009-01-04 22:46:16 +0100316# Bzip2
317# ---------------------------------------------------------------------------
318
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700319# Bzip2 and LZMA do not include size in file... so we have to fake that;
320# append the size as a 32-bit littleendian number as gzip does.
Michael Tokarev4a2ff672009-10-13 22:22:46 +0200321size_append = printf $(shell \
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700322dec_size=0; \
323for F in $1; do \
Michael Forneya670b0b2018-03-18 17:54:02 -0700324 fsize=$$($(CONFIG_SHELL) $(srctree)/scripts/file-size.sh $$F); \
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700325 dec_size=$$(expr $$dec_size + $$fsize); \
326done; \
Jonathan Nieder13734112009-12-28 19:38:27 +0000327printf "%08x\n" $$dec_size | \
328 sed 's/\(..\)/\1 /g' | { \
329 read ch0 ch1 ch2 ch3; \
330 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \
331 printf '%s%03o' '\\' $$((0x$$ch)); \
332 done; \
333 } \
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700334)
Alain Knaffbc22c172009-01-04 22:46:16 +0100335
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700336quiet_cmd_bzip2 = BZIP2 $@
337cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
338 bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
339 (rm -f $@ ; false)
Alain Knaffbc22c172009-01-04 22:46:16 +0100340
341# Lzma
342# ---------------------------------------------------------------------------
343
344quiet_cmd_lzma = LZMA $@
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700345cmd_lzma = (cat $(filter-out FORCE,$^) | \
346 lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
347 (rm -f $@ ; false)
Albin Tonnerre7dd65fe2010-01-08 14:42:42 -0800348
Wu Zhangjin2d74b2c2010-03-11 17:42:14 +0800349quiet_cmd_lzo = LZO $@
Albin Tonnerre7dd65fe2010-01-08 14:42:42 -0800350cmd_lzo = (cat $(filter-out FORCE,$^) | \
351 lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
352 (rm -f $@ ; false)
Borislav Petkovd61931d2010-03-05 17:34:46 +0100353
Kyungsik Leee76e1fd2013-07-08 16:01:46 -0700354quiet_cmd_lz4 = LZ4 $@
355cmd_lz4 = (cat $(filter-out FORCE,$^) | \
356 lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
357 (rm -f $@ ; false)
358
Stephen Warrene3393642012-03-16 15:03:55 -0600359# U-Boot mkimage
360# ---------------------------------------------------------------------------
361
362MKIMAGE := $(srctree)/scripts/mkuboot.sh
363
364# SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
365# the number of overrides in arch makefiles
366UIMAGE_ARCH ?= $(SRCARCH)
367UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
368UIMAGE_OPTS-y ?=
369UIMAGE_TYPE ?= kernel
370UIMAGE_LOADADDR ?= arch_must_set_this
371UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
372UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
373UIMAGE_IN ?= $<
374UIMAGE_OUT ?= $@
375
376quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT)
377 cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
378 -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
379 -T $(UIMAGE_TYPE) \
380 -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
381 -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT)
382
Lasse Collin24fa0402011-01-12 17:01:22 -0800383# XZ
384# ---------------------------------------------------------------------------
385# Use xzkern to compress the kernel image and xzmisc to compress other things.
386#
387# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
388# of the kernel decompressor. A BCJ filter is used if it is available for
389# the target architecture. xzkern also appends uncompressed size of the data
390# using size_append. The .xz format has the size information available at
391# the end of the file too, but it's in more complex format and it's good to
392# avoid changing the part of the boot code that reads the uncompressed size.
393# Note that the bytes added by size_append will make the xz tool think that
394# the file is corrupt. This is expected.
395#
396# xzmisc doesn't use size_append, so it can be used to create normal .xz
397# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
398# big dictionary would increase the memory usage too much in the multi-call
399# decompression mode. A BCJ filter isn't used either.
400quiet_cmd_xzkern = XZKERN $@
401cmd_xzkern = (cat $(filter-out FORCE,$^) | \
402 sh $(srctree)/scripts/xz_wrap.sh && \
403 $(call size_append, $(filter-out FORCE,$^))) > $@ || \
404 (rm -f $@ ; false)
405
406quiet_cmd_xzmisc = XZMISC $@
407cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
408 xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
409 (rm -f $@ ; false)
Matthias Kaehlckeebf003f2017-04-12 12:43:52 -0700410
411# ASM offsets
412# ---------------------------------------------------------------------------
413
414# Default sed regexp - multiline due to syntax constraints
Jeroen Hofsteecf0c3e62017-04-21 15:21:11 +0900415#
416# Use [:space:] because LLVM's integrated assembler inserts <tab> around
417# the .ascii directive whereas GCC keeps the <space> as-is.
Matthias Kaehlckeebf003f2017-04-12 12:43:52 -0700418define sed-offsets
Jeroen Hofsteecf0c3e62017-04-21 15:21:11 +0900419 's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; \
420 /^->/{s:->#\(.*\):/* \1 */:; \
Matthias Kaehlckeebf003f2017-04-12 12:43:52 -0700421 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
Jeroen Hofsteecf0c3e62017-04-21 15:21:11 +0900422 s:->::; p;}'
Matthias Kaehlckeebf003f2017-04-12 12:43:52 -0700423endef
424
425# Use filechk to avoid rebuilds when a header changes, but the resulting file
426# does not
427define filechk_offsets
428 (set -e; \
429 echo "#ifndef $2"; \
430 echo "#define $2"; \
431 echo "/*"; \
432 echo " * DO NOT MODIFY."; \
433 echo " *"; \
434 echo " * This file was generated by Kbuild"; \
435 echo " */"; \
436 echo ""; \
437 sed -ne $(sed-offsets); \
438 echo ""; \
439 echo "#endif" )
440endef