Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | # ========================================================================== |
| 3 | # Building |
| 4 | # ========================================================================== |
| 5 | |
| 6 | src := $(obj) |
| 7 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 8 | PHONY := __build |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | __build: |
| 10 | |
Sam Ravnborg | d72e5ed | 2007-05-28 22:47:48 +0200 | [diff] [blame] | 11 | # Init all relevant variables used in kbuild files so |
| 12 | # 1) they have correct type |
| 13 | # 2) they do not inherit any value from the environment |
| 14 | obj-y := |
| 15 | obj-m := |
| 16 | lib-y := |
| 17 | lib-m := |
| 18 | always := |
| 19 | targets := |
| 20 | subdir-y := |
| 21 | subdir-m := |
| 22 | EXTRA_AFLAGS := |
| 23 | EXTRA_CFLAGS := |
| 24 | EXTRA_CPPFLAGS := |
| 25 | EXTRA_LDFLAGS := |
Sam Ravnborg | f77bf01 | 2007-10-15 22:25:06 +0200 | [diff] [blame] | 26 | asflags-y := |
| 27 | ccflags-y := |
| 28 | cppflags-y := |
| 29 | ldflags-y := |
Sam Ravnborg | d72e5ed | 2007-05-28 22:47:48 +0200 | [diff] [blame] | 30 | |
Sam Ravnborg | 720097d | 2009-04-19 11:04:26 +0200 | [diff] [blame] | 31 | subdir-asflags-y := |
| 32 | subdir-ccflags-y := |
| 33 | |
Robert P. J. Day | 3156fd0 | 2008-02-18 04:48:20 -0500 | [diff] [blame] | 34 | # Read auto.conf if it exists, otherwise ignore |
Roman Zippel | c955cca | 2006-06-08 22:12:39 -0700 | [diff] [blame] | 35 | -include include/config/auto.conf |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
Sam Ravnborg | 20a468b | 2006-01-22 13:34:15 +0100 | [diff] [blame] | 37 | include scripts/Kbuild.include |
| 38 | |
Robert P. J. Day | 3156fd0 | 2008-02-18 04:48:20 -0500 | [diff] [blame] | 39 | # For backward compatibility check that these variables do not change |
Sam Ravnborg | 0c53c8e | 2007-10-14 22:26:53 +0200 | [diff] [blame] | 40 | save-cflags := $(CFLAGS) |
| 41 | |
Sam Ravnborg | 2a69147 | 2005-07-25 20:26:04 +0000 | [diff] [blame] | 42 | # The filename Kbuild has precedence over Makefile |
Sam Ravnborg | db8c1a7 | 2005-07-27 22:11:01 +0200 | [diff] [blame] | 43 | kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) |
Sam Ravnborg | 0c53c8e | 2007-10-14 22:26:53 +0200 | [diff] [blame] | 44 | kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) |
| 45 | include $(kbuild-file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Sam Ravnborg | 0c53c8e | 2007-10-14 22:26:53 +0200 | [diff] [blame] | 47 | # If the save-* variables changed error out |
| 48 | ifeq ($(KBUILD_NOPEDANTIC),) |
| 49 | ifneq ("$(save-cflags)","$(CFLAGS)") |
Arnaud Lacombe | 49c57d2 | 2011-08-15 01:07:13 -0400 | [diff] [blame] | 50 | $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y) |
Sam Ravnborg | 0c53c8e | 2007-10-14 22:26:53 +0200 | [diff] [blame] | 51 | endif |
| 52 | endif |
Borislav Petkov | 4a5838a | 2011-03-01 09:35:29 +0100 | [diff] [blame] | 53 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | include scripts/Makefile.lib |
| 55 | |
| 56 | ifdef host-progs |
| 57 | ifneq ($(hostprogs-y),$(host-progs)) |
| 58 | $(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) |
| 59 | hostprogs-y += $(host-progs) |
| 60 | endif |
| 61 | endif |
| 62 | |
Robert P. J. Day | 3156fd0 | 2008-02-18 04:48:20 -0500 | [diff] [blame] | 63 | # Do not include host rules unless needed |
Emese Revfy | 2440387 | 2016-05-24 00:08:25 +0200 | [diff] [blame] | 64 | ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | include scripts/Makefile.host |
| 66 | endif |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | ifndef obj |
| 69 | $(warning kbuild: Makefile.build is included improperly) |
| 70 | endif |
| 71 | |
| 72 | # =========================================================================== |
| 73 | |
Masahiro Yamada | a4954fd | 2014-09-09 19:26:21 +0900 | [diff] [blame] | 74 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | lib-target := $(obj)/lib.a |
Masahiro Yamada | f98fe47 | 2018-03-19 20:26:08 +0900 | [diff] [blame] | 76 | real-obj-y += $(obj)/lib-ksyms.o |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | endif |
| 78 | |
Masahiro Yamada | f98fe47 | 2018-03-19 20:26:08 +0900 | [diff] [blame] | 79 | ifneq ($(strip $(real-obj-y) $(need-builtin)),) |
Nicholas Piggin | f49821e | 2018-02-11 00:25:04 +1000 | [diff] [blame] | 80 | builtin-target := $(obj)/built-in.a |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | endif |
| 82 | |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 83 | modorder-target := $(obj)/modules.order |
| 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | # We keep a list of all modules in $(MODVERDIR) |
| 86 | |
| 87 | __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 88 | $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | $(subdir-ym) $(always) |
| 90 | @: |
| 91 | |
| 92 | # Linus' kernel sanity checking tool |
| 93 | ifneq ($(KBUILD_CHECKSRC),0) |
| 94 | ifeq ($(KBUILD_CHECKSRC),2) |
| 95 | quiet_cmd_force_checksrc = CHECK $< |
| 96 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
| 97 | else |
| 98 | quiet_cmd_checksrc = CHECK $< |
| 99 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
| 100 | endif |
| 101 | endif |
| 102 | |
Matthew Wilcox | 3a025e1 | 2017-11-20 10:40:40 -0800 | [diff] [blame] | 103 | ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),) |
| 104 | cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $< ; |
| 105 | endif |
| 106 | |
Nicholas Piggin | f49821e | 2018-02-11 00:25:04 +1000 | [diff] [blame] | 107 | # Do section mismatch analysis for each module/built-in.a |
Sam Ravnborg | 91341d4 | 2008-01-21 21:31:44 +0100 | [diff] [blame] | 108 | ifdef CONFIG_DEBUG_SECTION_MISMATCH |
| 109 | cmd_secanalysis = ; scripts/mod/modpost $@ |
| 110 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
| 112 | # Compile C sources (.c) |
| 113 | # --------------------------------------------------------------------------- |
| 114 | |
| 115 | # Default is built-in, unless we know otherwise |
Sam Ravnborg | 6588169 | 2010-07-28 17:33:09 +0200 | [diff] [blame] | 116 | modkern_cflags = \ |
| 117 | $(if $(part-of-module), \ |
| 118 | $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ |
Sam Ravnborg | 80c00ba | 2010-07-28 19:11:27 +0200 | [diff] [blame] | 119 | $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | quiet_modtag := $(empty) $(empty) |
| 121 | |
Masahiro Yamada | f5f3368 | 2018-03-19 20:26:07 +0900 | [diff] [blame] | 122 | $(real-obj-m) : part-of-module := y |
| 123 | $(real-obj-m:.o=.i) : part-of-module := y |
| 124 | $(real-obj-m:.o=.s) : part-of-module := y |
| 125 | $(real-obj-m:.o=.lst): part-of-module := y |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
Masahiro Yamada | f5f3368 | 2018-03-19 20:26:07 +0900 | [diff] [blame] | 127 | $(real-obj-m) : quiet_modtag := [M] |
| 128 | $(real-obj-m:.o=.i) : quiet_modtag := [M] |
| 129 | $(real-obj-m:.o=.s) : quiet_modtag := [M] |
| 130 | $(real-obj-m:.o=.lst): quiet_modtag := [M] |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
Masahiro Yamada | f5f3368 | 2018-03-19 20:26:07 +0900 | [diff] [blame] | 132 | $(obj-m) : quiet_modtag := [M] |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ |
Andi Kleen | 1e64ff4 | 2014-02-08 09:01:15 +0100 | [diff] [blame] | 135 | cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 137 | $(obj)/%.s: $(src)/%.c FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | $(call if_changed_dep,cc_s_c) |
| 139 | |
Masahiro Yamada | 23d4384 | 2016-04-08 11:24:47 +0900 | [diff] [blame] | 140 | quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@ |
| 141 | cmd_cpp_i_c = $(CPP) $(c_flags) -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 143 | $(obj)/%.i: $(src)/%.c FORCE |
Masahiro Yamada | 23d4384 | 2016-04-08 11:24:47 +0900 | [diff] [blame] | 144 | $(call if_changed_dep,cpp_i_c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 146 | # These mirror gensymtypes_S and co below, keep them in synch. |
| 147 | cmd_gensymtypes_c = \ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 148 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
James Hogan | d70f82a | 2013-03-18 19:38:56 +1030 | [diff] [blame] | 149 | $(GENKSYMS) $(if $(1), -T $(2)) \ |
Ard Biesheuvel | 5606781 | 2017-02-03 09:54:05 +0000 | [diff] [blame] | 150 | $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 151 | $(if $(KBUILD_PRESERVE),-p) \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 152 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 153 | |
Andreas Gruenbacher | 15fde67 | 2006-05-09 20:37:30 +0200 | [diff] [blame] | 154 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 155 | cmd_cc_symtypes_c = \ |
| 156 | set -e; \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 157 | $(call cmd_gensymtypes_c,true,$@) >/dev/null; \ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 158 | test -s $@ || rm -f $@ |
Andreas Gruenbacher | 15fde67 | 2006-05-09 20:37:30 +0200 | [diff] [blame] | 159 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 160 | $(obj)/%.symtypes : $(src)/%.c FORCE |
Andreas Gruenbacher | 64e6c1e | 2008-12-01 14:21:01 -0800 | [diff] [blame] | 161 | $(call cmd,cc_symtypes_c) |
Andreas Gruenbacher | 15fde67 | 2006-05-09 20:37:30 +0200 | [diff] [blame] | 162 | |
VinÃcius Tinti | 433db3e | 2017-04-24 13:04:58 -0700 | [diff] [blame] | 163 | # LLVM assembly |
| 164 | # Generate .ll files from .c |
| 165 | quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@ |
| 166 | cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $< |
| 167 | |
| 168 | $(obj)/%.ll: $(src)/%.c FORCE |
| 169 | $(call if_changed_dep,cc_ll_c) |
| 170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | # C (.c) files |
| 172 | # The C file is compiled and updated dependency information is generated. |
| 173 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) |
| 174 | |
| 175 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ |
| 176 | |
| 177 | ifndef CONFIG_MODVERSIONS |
| 178 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
| 179 | |
| 180 | else |
| 181 | # When module versioning is enabled the following steps are executed: |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 182 | # o compile a .tmp_<file>.o from <file>.c |
| 183 | # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does |
| 184 | # not export symbols, we just rename .tmp_<file>.o to <file>.o and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | # are done. |
| 186 | # o otherwise, we calculate symbol versions using the good old |
| 187 | # genksyms on the preprocessed source and postprocess them in a way |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 188 | # that they are usable as a linker script |
| 189 | # o generate <file>.o from .tmp_<file>.o using the linker to |
| 190 | # replace the unresolved symbols __crc_exported_symbol with |
| 191 | # the actual value of the checksum generated by genksyms |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 193 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 194 | |
| 195 | cmd_modversions_c = \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 196 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 197 | $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 198 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
| 199 | \ |
| 200 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ |
| 201 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
| 202 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ |
| 203 | else \ |
| 204 | mv -f $(@D)/.tmp_$(@F) $@; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | fi; |
| 206 | endif |
| 207 | |
Steven Rostedt | 8da3821 | 2008-08-14 15:45:07 -0400 | [diff] [blame] | 208 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
Andi Kleen | 96f60df | 2017-11-27 13:34:13 -0800 | [diff] [blame] | 209 | # gcc 5 supports generating the mcount tables directly |
| 210 | ifneq ($(call cc-option,-mrecord-mcount,y),y) |
| 211 | KBUILD_CFLAGS += -mrecord-mcount |
| 212 | else |
| 213 | # else do it all manually |
Steven Rostedt | 72441cb | 2010-10-13 17:12:30 -0400 | [diff] [blame] | 214 | ifdef BUILD_C_RECORDMCOUNT |
Steven Rostedt | 85356f8 | 2011-04-12 18:59:10 -0400 | [diff] [blame] | 215 | ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") |
| 216 | RECORDMCOUNT_FLAGS = -w |
| 217 | endif |
Steven Rostedt | d7b4d6d | 2010-10-18 14:42:00 -0400 | [diff] [blame] | 218 | # Due to recursion, we must skip empty.o. |
| 219 | # The empty.o file is created in the make process in order to determine |
Cao jin | 312a3d0 | 2017-08-02 10:31:06 +0800 | [diff] [blame] | 220 | # the target endianness and word size. It is made before all other C |
| 221 | # files, including recordmcount. |
Wu Zhangjin | 4567745 | 2010-10-28 00:24:34 +0800 | [diff] [blame] | 222 | sub_cmd_record_mcount = \ |
| 223 | if [ $(@) != "scripts/mod/empty.o" ]; then \ |
Steven Rostedt | 85356f8 | 2011-04-12 18:59:10 -0400 | [diff] [blame] | 224 | $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ |
Wu Zhangjin | 4567745 | 2010-10-28 00:24:34 +0800 | [diff] [blame] | 225 | fi; |
Michal Marek | d697182 | 2011-05-17 15:36:46 +0200 | [diff] [blame] | 226 | recordmcount_source := $(srctree)/scripts/recordmcount.c \ |
| 227 | $(srctree)/scripts/recordmcount.h |
Steven Rostedt | 72441cb | 2010-10-13 17:12:30 -0400 | [diff] [blame] | 228 | else |
Wu Zhangjin | 4567745 | 2010-10-28 00:24:34 +0800 | [diff] [blame] | 229 | sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
Wu Zhangjin | e6299d2 | 2009-11-20 20:34:31 +0800 | [diff] [blame] | 230 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
Steven Rostedt | b3acf29 | 2008-10-29 15:30:26 -0400 | [diff] [blame] | 231 | "$(if $(CONFIG_64BIT),64,32)" \ |
Rabin Vincent | f9810a8 | 2010-08-10 19:39:20 +0100 | [diff] [blame] | 232 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ |
| 233 | "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ |
Shaohua Li | 18c167f | 2009-01-12 10:00:51 +0800 | [diff] [blame] | 234 | "$(if $(part-of-module),1,0)" "$(@)"; |
Michal Marek | d697182 | 2011-05-17 15:36:46 +0200 | [diff] [blame] | 235 | recordmcount_source := $(srctree)/scripts/recordmcount.pl |
Cao jin | 312a3d0 | 2017-08-02 10:31:06 +0800 | [diff] [blame] | 236 | endif # BUILD_C_RECORDMCOUNT |
Heiko Carstens | c0a80c0 | 2015-01-09 13:06:33 +0100 | [diff] [blame] | 237 | cmd_record_mcount = \ |
| 238 | if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \ |
| 239 | "$(CC_FLAGS_FTRACE)" ]; then \ |
Wu Zhangjin | 4567745 | 2010-10-28 00:24:34 +0800 | [diff] [blame] | 240 | $(sub_cmd_record_mcount) \ |
| 241 | fi; |
Greg Thelen | ed7d40b | 2018-06-08 14:47:46 -0700 | [diff] [blame] | 242 | endif # -record-mcount |
Cao jin | 312a3d0 | 2017-08-02 10:31:06 +0800 | [diff] [blame] | 243 | endif # CONFIG_FTRACE_MCOUNT_RECORD |
Steven Rostedt | 8da3821 | 2008-08-14 15:45:07 -0400 | [diff] [blame] | 244 | |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 245 | ifdef CONFIG_STACK_VALIDATION |
Josh Poimboeuf | 3b27a0c | 2016-03-03 11:39:30 -0600 | [diff] [blame] | 246 | ifneq ($(SKIP_STACK_VALIDATION),1) |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 247 | |
| 248 | __objtool_obj := $(objtree)/tools/objtool/objtool |
| 249 | |
Josh Poimboeuf | 11af847 | 2017-10-13 15:02:00 -0500 | [diff] [blame] | 250 | objtool_args = $(if $(CONFIG_UNWINDER_ORC),orc generate,check) |
Josh Poimboeuf | ee9f8fc | 2017-07-24 18:36:57 -0500 | [diff] [blame] | 251 | |
Peter Zijlstra | ca41b97 | 2018-01-31 10:18:28 +0100 | [diff] [blame] | 252 | objtool_args += $(if $(part-of-module), --module,) |
| 253 | |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 254 | ifndef CONFIG_FRAME_POINTER |
| 255 | objtool_args += --no-fp |
| 256 | endif |
Josh Poimboeuf | 867ac9d | 2017-07-24 18:34:14 -0500 | [diff] [blame] | 257 | ifdef CONFIG_GCOV_KERNEL |
| 258 | objtool_args += --no-unreachable |
Josh Poimboeuf | da541b2 | 2017-09-27 17:34:23 -0500 | [diff] [blame] | 259 | else |
| 260 | objtool_args += $(call cc-ifversion, -lt, 0405, --no-unreachable) |
Josh Poimboeuf | 867ac9d | 2017-07-24 18:34:14 -0500 | [diff] [blame] | 261 | endif |
Peter Zijlstra | b5bc223 | 2018-01-16 10:24:06 +0100 | [diff] [blame] | 262 | ifdef CONFIG_RETPOLINE |
Peter Zijlstra | d5028ba | 2018-02-06 09:46:13 +0100 | [diff] [blame] | 263 | ifneq ($(RETPOLINE_CFLAGS),) |
Peter Zijlstra | b5bc223 | 2018-01-16 10:24:06 +0100 | [diff] [blame] | 264 | objtool_args += --retpoline |
| 265 | endif |
Peter Zijlstra | d5028ba | 2018-02-06 09:46:13 +0100 | [diff] [blame] | 266 | endif |
Peter Zijlstra | b5bc223 | 2018-01-16 10:24:06 +0100 | [diff] [blame] | 267 | |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 268 | |
Josh Poimboeuf | 2a0098d | 2018-01-15 08:17:07 -0600 | [diff] [blame] | 269 | ifdef CONFIG_MODVERSIONS |
| 270 | objtool_o = $(@D)/.tmp_$(@F) |
| 271 | else |
| 272 | objtool_o = $(@) |
| 273 | endif |
| 274 | |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 275 | # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory |
| 276 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file |
| 277 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file |
| 278 | cmd_objtool = $(if $(patsubst y%,, \ |
| 279 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ |
Josh Poimboeuf | 2a0098d | 2018-01-15 08:17:07 -0600 | [diff] [blame] | 280 | $(__objtool_obj) $(objtool_args) "$(objtool_o)";) |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 281 | objtool_obj = $(if $(patsubst y%,, \ |
| 282 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ |
| 283 | $(__objtool_obj)) |
| 284 | |
Josh Poimboeuf | 3b27a0c | 2016-03-03 11:39:30 -0600 | [diff] [blame] | 285 | endif # SKIP_STACK_VALIDATION |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 286 | endif # CONFIG_STACK_VALIDATION |
| 287 | |
Josh Poimboeuf | ee9f8fc | 2017-07-24 18:36:57 -0500 | [diff] [blame] | 288 | # Rebuild all objects when objtool changes, or is enabled/disabled. |
| 289 | objtool_dep = $(objtool_obj) \ |
| 290 | $(wildcard include/config/orc/unwinder.h \ |
| 291 | include/config/stack/validation.h) |
| 292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | define rule_cc_o_c |
Jan Beulich | 6176aa9 | 2006-01-30 10:04:27 +0100 | [diff] [blame] | 294 | $(call echo-cmd,checksrc) $(cmd_checksrc) \ |
Nicolas Pitre | e4aca45 | 2016-02-17 15:50:06 -0500 | [diff] [blame] | 295 | $(call cmd_and_fixdep,cc_o_c) \ |
Matthew Wilcox | 3a025e1 | 2017-11-20 10:40:40 -0800 | [diff] [blame] | 296 | $(cmd_checkdoc) \ |
Jiri Slaby | e8a3118 | 2017-04-21 17:16:20 +0200 | [diff] [blame] | 297 | $(call echo-cmd,objtool) $(cmd_objtool) \ |
Josh Poimboeuf | 2a0098d | 2018-01-15 08:17:07 -0600 | [diff] [blame] | 298 | $(cmd_modversions_c) \ |
Nicolas Pitre | e4aca45 | 2016-02-17 15:50:06 -0500 | [diff] [blame] | 299 | $(call echo-cmd,record_mcount) $(cmd_record_mcount) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | endef |
| 301 | |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 302 | define rule_as_o_S |
Nicolas Pitre | e4aca45 | 2016-02-17 15:50:06 -0500 | [diff] [blame] | 303 | $(call cmd_and_fixdep,as_o_S) \ |
Josh Poimboeuf | 2a0098d | 2018-01-15 08:17:07 -0600 | [diff] [blame] | 304 | $(call echo-cmd,objtool) $(cmd_objtool) \ |
| 305 | $(cmd_modversions_S) |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 306 | endef |
| 307 | |
Nicolas Pitre | 9895c03 | 2016-01-21 17:07:24 -0500 | [diff] [blame] | 308 | # List module undefined symbols (or empty line if not enabled) |
| 309 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
Michael Forney | 1fe7d2b | 2018-02-06 22:41:17 -0800 | [diff] [blame] | 310 | cmd_undef_syms = $(NM) $@ | sed -n 's/^ *U //p' | xargs echo |
Nicolas Pitre | 9895c03 | 2016-01-21 17:07:24 -0500 | [diff] [blame] | 311 | else |
| 312 | cmd_undef_syms = echo |
| 313 | endif |
| 314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | # Built-in and composite module parts |
Josh Poimboeuf | ee9f8fc | 2017-07-24 18:36:57 -0500 | [diff] [blame] | 316 | $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | $(call cmd,force_checksrc) |
| 318 | $(call if_changed_rule,cc_o_c) |
| 319 | |
| 320 | # Single-part modules are special since we need to mark them in $(MODVERDIR) |
| 321 | |
Josh Poimboeuf | ee9f8fc | 2017-07-24 18:36:57 -0500 | [diff] [blame] | 322 | $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | $(call cmd,force_checksrc) |
| 324 | $(call if_changed_rule,cc_o_c) |
Nicolas Pitre | 9895c03 | 2016-01-21 17:07:24 -0500 | [diff] [blame] | 325 | @{ echo $(@:.o=.ko); echo $@; \ |
| 326 | $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
| 328 | quiet_cmd_cc_lst_c = MKLST $@ |
| 329 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ |
| 330 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ |
| 331 | System.map $(OBJDUMP) > $@ |
| 332 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 333 | $(obj)/%.lst: $(src)/%.c FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | $(call if_changed_dep,cc_lst_c) |
| 335 | |
| 336 | # Compile assembler sources (.S) |
| 337 | # --------------------------------------------------------------------------- |
| 338 | |
Sam Ravnborg | 80c00ba | 2010-07-28 19:11:27 +0200 | [diff] [blame] | 339 | modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
Masahiro Yamada | f5f3368 | 2018-03-19 20:26:07 +0900 | [diff] [blame] | 341 | $(real-obj-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
| 342 | $(real-obj-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 344 | # .S file exports must have their C prototypes defined in asm/asm-prototypes.h |
| 345 | # or a file that it includes, in order to get versioned symbols. We build a |
| 346 | # dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from |
| 347 | # the .S file (with trailing ';'), and run genksyms on that, to extract vers. |
| 348 | # |
| 349 | # This is convoluted. The .S file must first be preprocessed to run guards and |
| 350 | # expand names, then the resulting exports must be constructed into plain |
| 351 | # EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed |
| 352 | # to make the genksyms input. |
| 353 | # |
| 354 | # These mirror gensymtypes_c and co above, keep them in synch. |
| 355 | cmd_gensymtypes_S = \ |
| 356 | (echo "\#include <linux/kernel.h>" ; \ |
| 357 | echo "\#include <asm/asm-prototypes.h>" ; \ |
| 358 | $(CPP) $(a_flags) $< | \ |
Nicholas Piggin | cc6acc1 | 2016-11-09 15:34:05 +1100 | [diff] [blame] | 359 | grep "\<___EXPORT_SYMBOL\>" | \ |
| 360 | sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ) | \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 361 | $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \ |
| 362 | $(GENKSYMS) $(if $(1), -T $(2)) \ |
Ard Biesheuvel | 5606781 | 2017-02-03 09:54:05 +0000 | [diff] [blame] | 363 | $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 364 | $(if $(KBUILD_PRESERVE),-p) \ |
| 365 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
| 366 | |
| 367 | quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@ |
| 368 | cmd_cc_symtypes_S = \ |
| 369 | set -e; \ |
| 370 | $(call cmd_gensymtypes_S,true,$@) >/dev/null; \ |
| 371 | test -s $@ || rm -f $@ |
| 372 | |
| 373 | $(obj)/%.symtypes : $(src)/%.S FORCE |
| 374 | $(call cmd,cc_symtypes_S) |
| 375 | |
| 376 | |
Masahiro Yamada | e0f41e5 | 2016-04-08 11:24:48 +0900 | [diff] [blame] | 377 | quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@ |
| 378 | cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 380 | $(obj)/%.s: $(src)/%.S FORCE |
Masahiro Yamada | e0f41e5 | 2016-04-08 11:24:48 +0900 | [diff] [blame] | 381 | $(call if_changed_dep,cpp_s_S) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
| 383 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 384 | |
| 385 | ifndef CONFIG_MODVERSIONS |
| 386 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
| 387 | |
| 388 | else |
| 389 | |
| 390 | ASM_PROTOTYPES := $(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/asm-prototypes.h) |
| 391 | |
| 392 | ifeq ($(ASM_PROTOTYPES),) |
| 393 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
| 394 | |
| 395 | else |
| 396 | |
| 397 | # versioning matches the C process described above, with difference that |
| 398 | # we parse asm-prototypes.h C header to get function definitions. |
| 399 | |
| 400 | cmd_as_o_S = $(CC) $(a_flags) -c -o $(@D)/.tmp_$(@F) $< |
| 401 | |
| 402 | cmd_modversions_S = \ |
| 403 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
| 404 | $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
| 405 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
| 406 | \ |
| 407 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ |
| 408 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
| 409 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ |
| 410 | else \ |
| 411 | mv -f $(@D)/.tmp_$(@F) $@; \ |
| 412 | fi; |
| 413 | endif |
| 414 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
Josh Poimboeuf | ee9f8fc | 2017-07-24 18:36:57 -0500 | [diff] [blame] | 416 | $(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 417 | $(call if_changed_rule,as_o_S) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
Masahiro Yamada | f98fe47 | 2018-03-19 20:26:08 +0900 | [diff] [blame] | 419 | targets += $(filter-out $(subdir-obj-y), $(real-obj-y)) $(real-obj-m) $(lib-y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | targets += $(extra-y) $(MAKECMDGOALS) $(always) |
| 421 | |
| 422 | # Linker scripts preprocessor (.lds.S -> .lds) |
| 423 | # --------------------------------------------------------------------------- |
| 424 | quiet_cmd_cpp_lds_S = LDS $@ |
Linus Torvalds | 5cb0512 | 2017-11-02 14:10:37 -0700 | [diff] [blame] | 425 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \ |
Tim Abbott | 42f29a2 | 2009-09-20 18:14:12 -0400 | [diff] [blame] | 426 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 428 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | $(call if_changed_dep,cpp_lds_S) |
| 430 | |
David Howells | 4520c6a | 2012-09-21 23:31:13 +0100 | [diff] [blame] | 431 | # ASN.1 grammar |
| 432 | # --------------------------------------------------------------------------- |
| 433 | quiet_cmd_asn1_compiler = ASN.1 $@ |
| 434 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ |
| 435 | $(subst .h,.c,$@) $(subst .c,.h,$@) |
| 436 | |
Masahiro Yamada | 4fa8bc9 | 2018-03-23 22:04:37 +0900 | [diff] [blame] | 437 | $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler |
David Howells | 4520c6a | 2012-09-21 23:31:13 +0100 | [diff] [blame] | 438 | $(call cmd,asn1_compiler) |
| 439 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | # Build the compiled-in targets |
| 441 | # --------------------------------------------------------------------------- |
| 442 | |
| 443 | # To build objects in subdirs, we need to descend into the directories |
| 444 | $(sort $(subdir-obj-y)): $(subdir-ym) ; |
| 445 | |
| 446 | # |
| 447 | # Rule to compile a set of .o files into one .o file |
| 448 | # |
| 449 | ifdef builtin-target |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 450 | |
Nicholas Piggin | f49821e | 2018-02-11 00:25:04 +1000 | [diff] [blame] | 451 | # built-in.a archives are made with no symbol table or index which |
Nicholas Piggin | 6358d6e | 2018-02-11 00:25:03 +1000 | [diff] [blame] | 452 | # makes them small and fast, but unable to be used by the linker. |
Nicholas Piggin | f49821e | 2018-02-11 00:25:04 +1000 | [diff] [blame] | 453 | # scripts/link-vmlinux.sh builds an aggregate built-in.a with a symbol |
Nicholas Piggin | 6358d6e | 2018-02-11 00:25:03 +1000 | [diff] [blame] | 454 | # table and index. |
Masahiro Yamada | 5e18f02 | 2018-03-19 20:26:12 +0900 | [diff] [blame] | 455 | quiet_cmd_ar_builtin = AR $@ |
| 456 | cmd_ar_builtin = rm -f $@; \ |
| 457 | $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(filter $(real-obj-y), $^) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
Masahiro Yamada | f98fe47 | 2018-03-19 20:26:08 +0900 | [diff] [blame] | 459 | $(builtin-target): $(real-obj-y) FORCE |
Masahiro Yamada | 5e18f02 | 2018-03-19 20:26:12 +0900 | [diff] [blame] | 460 | $(call if_changed,ar_builtin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
| 462 | targets += $(builtin-target) |
| 463 | endif # builtin-target |
| 464 | |
| 465 | # |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 466 | # Rule to create modules.order file |
| 467 | # |
| 468 | # Create commands to either record .ko file or cat modules.order from |
| 469 | # a subdirectory |
| 470 | modorder-cmds = \ |
| 471 | $(foreach m, $(modorder), \ |
| 472 | $(if $(filter %/modules.order, $m), \ |
| 473 | cat $m;, echo kernel/$m;)) |
| 474 | |
| 475 | $(modorder-target): $(subdir-ym) FORCE |
| 476 | $(Q)(cat /dev/null; $(modorder-cmds)) > $@ |
| 477 | |
| 478 | # |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | # Rule to compile a set of .o files into one .a file |
| 480 | # |
| 481 | ifdef lib-target |
| 482 | quiet_cmd_link_l_target = AR $@ |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 483 | |
Nicholas Piggin | 6358d6e | 2018-02-11 00:25:03 +1000 | [diff] [blame] | 484 | # lib target archives do get a symbol table and index |
| 485 | cmd_link_l_target = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(lib-y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
| 487 | $(lib-target): $(lib-y) FORCE |
| 488 | $(call if_changed,link_l_target) |
| 489 | |
| 490 | targets += $(lib-target) |
Al Viro | 7f2084f | 2016-01-15 14:01:22 -0500 | [diff] [blame] | 491 | |
| 492 | dummy-object = $(obj)/.lib_exports.o |
| 493 | ksyms-lds = $(dot-target).lds |
Al Viro | 7f2084f | 2016-01-15 14:01:22 -0500 | [diff] [blame] | 494 | |
| 495 | quiet_cmd_export_list = EXPORTS $@ |
| 496 | cmd_export_list = $(OBJDUMP) -h $< | \ |
Masahiro Yamada | 704db5433 | 2018-05-09 16:23:50 +0900 | [diff] [blame] | 497 | sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/EXTERN(\1)/p' >$(ksyms-lds);\ |
Al Viro | 7f2084f | 2016-01-15 14:01:22 -0500 | [diff] [blame] | 498 | rm -f $(dummy-object);\ |
Nicholas Piggin | 9da2f58 | 2016-11-24 03:41:40 +1100 | [diff] [blame] | 499 | echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\ |
Al Viro | 7f2084f | 2016-01-15 14:01:22 -0500 | [diff] [blame] | 500 | $(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\ |
| 501 | rm $(dummy-object) $(ksyms-lds) |
| 502 | |
| 503 | $(obj)/lib-ksyms.o: $(lib-target) FORCE |
| 504 | $(call if_changed,export_list) |
Nicholas Piggin | 989cea5c | 2016-10-21 01:13:33 +1100 | [diff] [blame] | 505 | |
| 506 | targets += $(obj)/lib-ksyms.o |
| 507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | endif |
| 509 | |
| 510 | # |
| 511 | # Rule to link composite objects |
| 512 | # |
| 513 | # Composite objects are specified in kbuild makefile as follows: |
| 514 | # <composite-object>-objs := <list of .o files> |
| 515 | # or |
| 516 | # <composite-object>-y := <list of .o files> |
Michal Marek | cf4f219 | 2015-10-27 14:02:24 +0100 | [diff] [blame] | 517 | # or |
| 518 | # <composite-object>-m := <list of .o files> |
| 519 | # The -m syntax only works if <composite object> is a module |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | link_multi_deps = \ |
| 521 | $(filter $(addprefix $(obj)/, \ |
| 522 | $($(subst $(obj)/,,$(@:.o=-objs))) \ |
Michal Marek | cf4f219 | 2015-10-27 14:02:24 +0100 | [diff] [blame] | 523 | $($(subst $(obj)/,,$(@:.o=-y))) \ |
| 524 | $($(subst $(obj)/,,$(@:.o=-m)))), $^) |
Masahiro Yamada | 38385f8 | 2014-04-28 16:26:18 +0900 | [diff] [blame] | 525 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | quiet_cmd_link_multi-m = LD [M] $@ |
Masahiro Yamada | 127668c | 2018-03-19 20:26:13 +0900 | [diff] [blame] | 527 | cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | |
Masahiro Yamada | c8589d1 | 2014-08-19 16:34:20 +0900 | [diff] [blame] | 529 | $(multi-used-m): FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | $(call if_changed,link_multi-m) |
Nicolas Pitre | 9895c03 | 2016-01-21 17:07:24 -0500 | [diff] [blame] | 531 | @{ echo $(@:.o=.ko); echo $(link_multi_deps); \ |
| 532 | $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) |
Michal Marek | cf4f219 | 2015-10-27 14:02:24 +0100 | [diff] [blame] | 533 | $(call multi_depend, $(multi-used-m), .o, -objs -y -m) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
Masahiro Yamada | f98fe47 | 2018-03-19 20:26:08 +0900 | [diff] [blame] | 535 | targets += $(multi-used-m) |
Masahiro Yamada | 591f668 | 2017-11-13 19:29:36 +0900 | [diff] [blame] | 536 | targets := $(filter-out $(PHONY), $(targets)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
Masahiro Yamada | b23d1a2 | 2018-03-23 22:04:33 +0900 | [diff] [blame] | 538 | # Add intermediate targets: |
| 539 | # When building objects with specific suffix patterns, add intermediate |
| 540 | # targets that the final targets are derived from. |
| 541 | intermediate_targets = $(foreach sfx, $(2), \ |
| 542 | $(patsubst %$(strip $(1)),%$(sfx), \ |
| 543 | $(filter %$(strip $(1)), $(targets)))) |
Masahiro Yamada | 54a702f | 2018-03-23 22:04:39 +0900 | [diff] [blame] | 544 | # %.asn1.o <- %.asn1.[ch] <- %.asn1 |
Masahiro Yamada | a7f9241 | 2018-03-23 22:04:34 +0900 | [diff] [blame] | 545 | # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts |
Masahiro Yamada | b23d1a2 | 2018-03-23 22:04:33 +0900 | [diff] [blame] | 546 | # %.lex.o <- %.lex.c <- %.l |
| 547 | # %.tab.o <- %.tab.[ch] <- %.y |
Masahiro Yamada | 54a702f | 2018-03-23 22:04:39 +0900 | [diff] [blame] | 548 | targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \ |
| 549 | $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \ |
Masahiro Yamada | a7f9241 | 2018-03-23 22:04:34 +0900 | [diff] [blame] | 550 | $(call intermediate_targets, .lex.o, .lex.c) \ |
Masahiro Yamada | b23d1a2 | 2018-03-23 22:04:33 +0900 | [diff] [blame] | 551 | $(call intermediate_targets, .tab.o, .tab.c .tab.h) |
| 552 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | # Descending |
| 554 | # --------------------------------------------------------------------------- |
| 555 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 556 | PHONY += $(subdir-ym) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | $(subdir-ym): |
Masahiro Yamada | f7adc31 | 2017-11-08 01:31:46 +0900 | [diff] [blame] | 558 | $(Q)$(MAKE) $(build)=$@ need-builtin=$(if $(findstring $@,$(subdir-obj-y)),1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | |
| 560 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
| 561 | # --------------------------------------------------------------------------- |
| 562 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 563 | PHONY += FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
| 565 | FORCE: |
| 566 | |
| 567 | # Read all saved command lines and dependencies for the $(targets) we |
| 568 | # may be building above, using $(if_changed{,_dep}). As an |
| 569 | # optimization, we don't need to read them if the target does not |
| 570 | # exist, we will rebuild anyway in that case. |
| 571 | |
Masahiro Yamada | 2982c95 | 2017-11-13 19:29:35 +0900 | [diff] [blame] | 572 | cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | |
| 574 | ifneq ($(cmd_files),) |
| 575 | include $(cmd_files) |
| 576 | endif |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 577 | |
Masahiro Yamada | 8a78756 | 2017-11-13 19:29:37 +0900 | [diff] [blame] | 578 | ifneq ($(KBUILD_SRC),) |
| 579 | # Create directories for object files if they do not exist |
| 580 | obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets)))) |
Masahiro Yamada | c4da7ed | 2017-11-13 19:29:38 +0900 | [diff] [blame] | 581 | # If cmd_files exist, their directories apparently exist. Skip mkdir. |
| 582 | exist-dirs := $(sort $(patsubst %/,%, $(dir $(cmd_files)))) |
| 583 | obj-dirs := $(strip $(filter-out $(exist-dirs), $(obj-dirs))) |
| 584 | ifneq ($(obj-dirs),) |
Masahiro Yamada | 8a78756 | 2017-11-13 19:29:37 +0900 | [diff] [blame] | 585 | $(shell mkdir -p $(obj-dirs)) |
| 586 | endif |
Masahiro Yamada | c4da7ed | 2017-11-13 19:29:38 +0900 | [diff] [blame] | 587 | endif |
Masahiro Yamada | 8a78756 | 2017-11-13 19:29:37 +0900 | [diff] [blame] | 588 | |
Masahiro Yamada | 54a702f | 2018-03-23 22:04:39 +0900 | [diff] [blame] | 589 | # Some files contained in $(targets) are intermediate artifacts. |
| 590 | # We never want them to be removed automatically. |
| 591 | .SECONDARY: $(targets) |
| 592 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 593 | # Declare the contents of the .PHONY variable as phony. We keep that |
| 594 | # information in a variable se we can use it in if_changed and friends. |
| 595 | |
| 596 | .PHONY: $(PHONY) |