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Tom Rinif32c8642016-01-14 18:24:44 -05001#
2# SPDX-License-Identifier: GPL-2.0
3#
Masahiro Yamada22433fc2014-02-04 17:24:27 +09004# Backward compatibility
5asflags-y += $(EXTRA_AFLAGS)
6ccflags-y += $(EXTRA_CFLAGS)
7cppflags-y += $(EXTRA_CPPFLAGS)
8ldflags-y += $(EXTRA_LDFLAGS)
9
10#
11# flags that take effect in sub directories
12export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y)
13export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(subdir-ccflags-y)
14
15# Figure out what we need to build from the various variables
16# ===========================================================================
17
18# When an object is listed to be built compiled-in and modular,
19# only build the compiled-in version
20
21obj-m := $(filter-out $(obj-y),$(obj-m))
22
23# Libraries are always collected in one lib file.
24# Filter out objects already built-in
25
26lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
27
28
29# Handle objects in subdirs
30# ---------------------------------------------------------------------------
31# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o
32# and add the directory to the list of dirs to descend into: $(subdir-y)
Masahiro Yamada45f0ad92014-06-16 18:56:38 +090033# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
Masahiro Yamada22433fc2014-02-04 17:24:27 +090034# and add the directory to the list of dirs to descend into: $(subdir-m)
35
36# Determine modorder.
37# Unfortunately, we don't have information about ordering between -y
38# and -m subdirs. Just put -y's first.
39modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
40
41__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
42subdir-y += $(__subdir-y)
43__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
44subdir-m += $(__subdir-m)
45obj-y := $(patsubst %/, %/built-in.o, $(obj-y))
46obj-m := $(filter-out %/, $(obj-m))
47
48# Subdirectories we need to descend into
49
50subdir-ym := $(sort $(subdir-y) $(subdir-m))
51
Masahiro Yamada45f0ad92014-06-16 18:56:38 +090052# if $(foo-objs) exists, foo.o is a composite object
Masahiro Yamada22433fc2014-02-04 17:24:27 +090053multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
54multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
55multi-used := $(multi-used-y) $(multi-used-m)
56single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
57
58# Build list of the parts of our composite objects, our composite
59# objects depend on those (obviously)
60multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y)))
61multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y)))
62multi-objs := $(multi-objs-y) $(multi-objs-m)
63
64# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
65# tell kbuild to descend
66subdir-obj-y := $(filter %/built-in.o, $(obj-y))
67
68# $(obj-dirs) is a list of directories that contain object files
69obj-dirs := $(dir $(multi-objs) $(obj-y))
70
71# Replace multi-part objects by their individual parts, look at local dir only
72real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
73real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
74
75# Add subdir path
76
77extra-y := $(addprefix $(obj)/,$(extra-y))
78always := $(addprefix $(obj)/,$(always))
79targets := $(addprefix $(obj)/,$(targets))
80modorder := $(addprefix $(obj)/,$(modorder))
81obj-y := $(addprefix $(obj)/,$(obj-y))
82obj-m := $(addprefix $(obj)/,$(obj-m))
83lib-y := $(addprefix $(obj)/,$(lib-y))
84subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
85real-objs-y := $(addprefix $(obj)/,$(real-objs-y))
86real-objs-m := $(addprefix $(obj)/,$(real-objs-m))
87single-used-m := $(addprefix $(obj)/,$(single-used-m))
88multi-used-y := $(addprefix $(obj)/,$(multi-used-y))
89multi-used-m := $(addprefix $(obj)/,$(multi-used-m))
90multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y))
91multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
92subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
93obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
94
95# These flags are needed for modversions and compiling, so we define them here
96# already
Masahiro Yamada45f0ad92014-06-16 18:56:38 +090097# $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
Masahiro Yamada22433fc2014-02-04 17:24:27 +090098# end up in (or would, if it gets compiled in)
99# Note: Files that end up in two or more modules are compiled without the
100# KBUILD_MODNAME definition. The reason is that any made-up name would
101# differ in different configs.
102name-fix = $(subst $(comma),_,$(subst -,_,$1))
103basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))"
104modname_flags = $(if $(filter 1,$(words $(modname))),\
105 -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))")
106
Masahiro Yamada026f9cf2014-03-05 16:59:40 +0900107orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900108 $(ccflags-y) $(CFLAGS_$(basetarget).o)
109_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
Simon Glass3834f412015-07-31 09:31:18 -0600110orig_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900111 $(asflags-y) $(AFLAGS_$(basetarget).o)
Simon Glass3834f412015-07-31 09:31:18 -0600112_a_flags = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags))
Masahiro Yamada026f9cf2014-03-05 16:59:40 +0900113_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900114
115#
116# Enable gcov profiling flags for a file, directory or for all files depending
117# on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
118# (in this order)
119#
120ifeq ($(CONFIG_GCOV_KERNEL),y)
121_c_flags += $(if $(patsubst n%,, \
122 $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
123 $(CFLAGS_GCOV))
124endif
125
Masahiro Yamada98bd0e02015-07-05 01:56:55 +0900126#
127# Enable address sanitizer flags for kernel except some files or directories
128# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
129#
130ifeq ($(CONFIG_KASAN),y)
131_c_flags += $(if $(patsubst n%,, \
132 $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
133 $(CFLAGS_KASAN))
134endif
135
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900136# If building the kernel in a separate objtree expand all occurrences
137# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
138
139ifeq ($(KBUILD_SRC),)
140__c_flags = $(_c_flags)
141__a_flags = $(_a_flags)
142__cpp_flags = $(_cpp_flags)
143else
144
145# -I$(obj) locates generated .h files
146# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
147# and locates generated .h files
148# FIXME: Replace both with specific CFLAGS* statements in the makefiles
149__c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags)
150__a_flags = $(call flags,_a_flags)
151__cpp_flags = $(call flags,_cpp_flags)
152endif
153
Masahiro Yamada6825a952014-02-04 17:24:28 +0900154# Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE
155c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900156 $(__c_flags) $(modkern_cflags) \
157 -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags)
158
Masahiro Yamada6825a952014-02-04 17:24:28 +0900159a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900160 $(__a_flags) $(modkern_aflags)
161
Masahiro Yamada6825a952014-02-04 17:24:28 +0900162cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900163 $(__cpp_flags)
164
165ld_flags = $(LDFLAGS) $(ldflags-y)
166
Masahiro Yamada6ab6b2a2014-02-05 11:28:25 +0900167# Modified for U-Boot
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900168dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
Masahiro Yamada6ab6b2a2014-02-05 11:28:25 +0900169 -I$(srctree)/arch/$(ARCH)/dts \
Simon Glass5957ac22014-06-11 23:29:44 -0600170 -I$(srctree)/arch/$(ARCH)/dts/include \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900171 -undef -D__DTS__
172
173# Finds the multi-part object the current object will be linked into
174modname-multi = $(sort $(foreach m,$(multi-used),\
175 $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
176
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900177# Useful for describing the dependency of composite objects
178# Usage:
179# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
180define multi_depend
181$(foreach m, $(notdir $1), \
182 $(eval $(obj)/$m: \
183 $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
184endef
185
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900186ifdef REGENERATE_PARSERS
187
188# GPERF
189# ---------------------------------------------------------------------------
190quiet_cmd_gperf = GPERF $@
191 cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $<
192
193.PRECIOUS: $(src)/%.hash.c_shipped
194$(src)/%.hash.c_shipped: $(src)/%.gperf
195 $(call cmd,gperf)
196
197# LEX
198# ---------------------------------------------------------------------------
199LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
200
201quiet_cmd_flex = LEX $@
202 cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<
203
204.PRECIOUS: $(src)/%.lex.c_shipped
205$(src)/%.lex.c_shipped: $(src)/%.l
206 $(call cmd,flex)
207
208# YACC
209# ---------------------------------------------------------------------------
210YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)
211
212quiet_cmd_bison = YACC $@
213 cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<
214
215.PRECIOUS: $(src)/%.tab.c_shipped
216$(src)/%.tab.c_shipped: $(src)/%.y
217 $(call cmd,bison)
218
219quiet_cmd_bison_h = YACC $@
220 cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<
221
222.PRECIOUS: $(src)/%.tab.h_shipped
223$(src)/%.tab.h_shipped: $(src)/%.y
224 $(call cmd,bison_h)
225
226endif
227
228# Shipped files
229# ===========================================================================
230
231quiet_cmd_shipped = SHIPPED $@
232cmd_shipped = cat $< > $@
233
234$(obj)/%: $(src)/%_shipped
235 $(call cmd,shipped)
236
237# Commands useful for building a boot image
238# ===========================================================================
Masahiro Yamada45f0ad92014-06-16 18:56:38 +0900239#
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900240# Use as following:
241#
242# target: source(s) FORCE
243# $(if_changed,ld/objcopy/gzip)
244#
245# and add target to extra-y so that we know we have to
246# read in the saved command line
247
248# Linking
249# ---------------------------------------------------------------------------
250
251quiet_cmd_ld = LD $@
252cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
Masahiro Yamada45f0ad92014-06-16 18:56:38 +0900253 $(filter-out FORCE,$^) -o $@
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900254
255# Objcopy
256# ---------------------------------------------------------------------------
257
258quiet_cmd_objcopy = OBJCOPY $@
259cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
260
261# Gzip
262# ---------------------------------------------------------------------------
263
264quiet_cmd_gzip = GZIP $@
265cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
266 (rm -f $@ ; false)
267
268# DTC
269# ---------------------------------------------------------------------------
270
271# Generate an assembly file to wrap the output of the device tree compiler
272quiet_cmd_dt_S_dtb= DTB $@
Masahiro Yamada6ab6b2a2014-02-05 11:28:25 +0900273# Modified for U-Boot
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900274cmd_dt_S_dtb= \
275( \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900276 echo '.section .dtb.init.rodata,"a"'; \
Simon Glass5c30bf42014-11-14 18:18:19 -0700277 echo '.balign 16'; \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900278 echo '.global __dtb_$(*F)_begin'; \
279 echo '__dtb_$(*F)_begin:'; \
280 echo '.incbin "$<" '; \
281 echo '__dtb_$(*F)_end:'; \
282 echo '.global __dtb_$(*F)_end'; \
Simon Glass5c30bf42014-11-14 18:18:19 -0700283 echo '.balign 16'; \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900284) > $@
285
286$(obj)/%.dtb.S: $(obj)/%.dtb
287 $(call cmd,dt_S_dtb)
288
289quiet_cmd_dtc = DTC $@
Masahiro Yamada6ab6b2a2014-02-05 11:28:25 +0900290# Modified for U-Boot
Masahiro Yamada98bd0e02015-07-05 01:56:55 +0900291cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
292 $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
Pavel Machekc4aaf2e2015-04-06 15:46:44 +0200293 $(DTC) -O dtb -o $@ -b 0 \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900294 -i $(dir $<) $(DTC_FLAGS) \
295 -d $(depfile).dtc.tmp $(dtc-tmp) ; \
296 cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
297
298$(obj)/%.dtb: $(src)/%.dts FORCE
299 $(call if_changed_dep,dtc)
300
301dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
302
Saket Sinha867bcb62015-08-22 12:20:55 +0530303# ACPI
304# ---------------------------------------------------------------------------
305quiet_cmd_acpi_c_asl= ASL $@
306cmd_acpi_c_asl= \
307 $(CPP) -x assembler-with-cpp -P -o $<.tmp $<; \
308 iasl -p $< -tc -va $<.tmp; \
309 mv $(patsubst %.asl,%.hex,$<) $@
310
311$(obj)/%.c: $(src)/%.asl
312 $(call cmd,acpi_c_asl)
313
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900314# Bzip2
315# ---------------------------------------------------------------------------
316
317# Bzip2 and LZMA do not include size in file... so we have to fake that;
318# append the size as a 32-bit littleendian number as gzip does.
319size_append = printf $(shell \
320dec_size=0; \
321for F in $1; do \
322 fsize=$$(stat -c "%s" $$F); \
323 dec_size=$$(expr $$dec_size + $$fsize); \
324done; \
325printf "%08x\n" $$dec_size | \
326 sed 's/\(..\)/\1 /g' | { \
327 read ch0 ch1 ch2 ch3; \
328 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \
329 printf '%s%03o' '\\' $$((0x$$ch)); \
330 done; \
331 } \
332)
333
334quiet_cmd_bzip2 = BZIP2 $@
335cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
336 bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
337 (rm -f $@ ; false)
338
339# Lzma
340# ---------------------------------------------------------------------------
341
342quiet_cmd_lzma = LZMA $@
343cmd_lzma = (cat $(filter-out FORCE,$^) | \
344 lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
345 (rm -f $@ ; false)
346
347quiet_cmd_lzo = LZO $@
348cmd_lzo = (cat $(filter-out FORCE,$^) | \
349 lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
350 (rm -f $@ ; false)
351
352quiet_cmd_lz4 = LZ4 $@
353cmd_lz4 = (cat $(filter-out FORCE,$^) | \
354 lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
355 (rm -f $@ ; false)
356
357# U-Boot mkimage
358# ---------------------------------------------------------------------------
359
360MKIMAGE := $(srctree)/scripts/mkuboot.sh
361
362# SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
363# the number of overrides in arch makefiles
364UIMAGE_ARCH ?= $(SRCARCH)
365UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
366UIMAGE_OPTS-y ?=
367UIMAGE_TYPE ?= kernel
368UIMAGE_LOADADDR ?= arch_must_set_this
369UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
370UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
371UIMAGE_IN ?= $<
372UIMAGE_OUT ?= $@
373
374quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT)
375 cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
376 -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
377 -T $(UIMAGE_TYPE) \
378 -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
379 -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT)
380
381# XZ
382# ---------------------------------------------------------------------------
383# Use xzkern to compress the kernel image and xzmisc to compress other things.
384#
385# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
386# of the kernel decompressor. A BCJ filter is used if it is available for
387# the target architecture. xzkern also appends uncompressed size of the data
388# using size_append. The .xz format has the size information available at
389# the end of the file too, but it's in more complex format and it's good to
390# avoid changing the part of the boot code that reads the uncompressed size.
391# Note that the bytes added by size_append will make the xz tool think that
392# the file is corrupt. This is expected.
393#
394# xzmisc doesn't use size_append, so it can be used to create normal .xz
395# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
396# big dictionary would increase the memory usage too much in the multi-call
397# decompression mode. A BCJ filter isn't used either.
398quiet_cmd_xzkern = XZKERN $@
399cmd_xzkern = (cat $(filter-out FORCE,$^) | \
400 sh $(srctree)/scripts/xz_wrap.sh && \
401 $(call size_append, $(filter-out FORCE,$^))) > $@ || \
402 (rm -f $@ ; false)
403
404quiet_cmd_xzmisc = XZMISC $@
405cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
406 xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
407 (rm -f $@ ; false)
Masahiro Yamadaba8dd772014-06-04 10:12:21 +0900408
409# Additional commands for U-Boot
410#
411# mkimage
412# ---------------------------------------------------------------------------
413quiet_cmd_mkimage = MKIMAGE $@
414cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
415 $(if $(KBUILD_VERBOSE:1=), >/dev/null)