Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | # ========================================================================== |
| 2 | # Building |
| 3 | # ========================================================================== |
| 4 | |
| 5 | src := $(obj) |
| 6 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 7 | PHONY := __build |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | __build: |
| 9 | |
Sam Ravnborg | d72e5ed | 2007-05-28 22:47:48 +0200 | [diff] [blame] | 10 | # Init all relevant variables used in kbuild files so |
| 11 | # 1) they have correct type |
| 12 | # 2) they do not inherit any value from the environment |
| 13 | obj-y := |
| 14 | obj-m := |
| 15 | lib-y := |
| 16 | lib-m := |
| 17 | always := |
| 18 | targets := |
| 19 | subdir-y := |
| 20 | subdir-m := |
| 21 | EXTRA_AFLAGS := |
| 22 | EXTRA_CFLAGS := |
| 23 | EXTRA_CPPFLAGS := |
| 24 | EXTRA_LDFLAGS := |
Sam Ravnborg | f77bf01 | 2007-10-15 22:25:06 +0200 | [diff] [blame] | 25 | asflags-y := |
| 26 | ccflags-y := |
| 27 | cppflags-y := |
| 28 | ldflags-y := |
Sam Ravnborg | d72e5ed | 2007-05-28 22:47:48 +0200 | [diff] [blame] | 29 | |
Sam Ravnborg | 720097d | 2009-04-19 11:04:26 +0200 | [diff] [blame] | 30 | subdir-asflags-y := |
| 31 | subdir-ccflags-y := |
| 32 | |
Robert P. J. Day | 3156fd0 | 2008-02-18 04:48:20 -0500 | [diff] [blame] | 33 | # Read auto.conf if it exists, otherwise ignore |
Roman Zippel | c955cca | 2006-06-08 22:12:39 -0700 | [diff] [blame] | 34 | -include include/config/auto.conf |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Sam Ravnborg | 20a468b | 2006-01-22 13:34:15 +0100 | [diff] [blame] | 36 | include scripts/Kbuild.include |
| 37 | |
Robert P. J. Day | 3156fd0 | 2008-02-18 04:48:20 -0500 | [diff] [blame] | 38 | # For backward compatibility check that these variables do not change |
Sam Ravnborg | 0c53c8e | 2007-10-14 22:26:53 +0200 | [diff] [blame] | 39 | save-cflags := $(CFLAGS) |
| 40 | |
Sam Ravnborg | 2a69147 | 2005-07-25 20:26:04 +0000 | [diff] [blame] | 41 | # The filename Kbuild has precedence over Makefile |
Sam Ravnborg | db8c1a7 | 2005-07-27 22:11:01 +0200 | [diff] [blame] | 42 | kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) |
Sam Ravnborg | 0c53c8e | 2007-10-14 22:26:53 +0200 | [diff] [blame] | 43 | kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) |
| 44 | include $(kbuild-file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Sam Ravnborg | 0c53c8e | 2007-10-14 22:26:53 +0200 | [diff] [blame] | 46 | # If the save-* variables changed error out |
| 47 | ifeq ($(KBUILD_NOPEDANTIC),) |
| 48 | ifneq ("$(save-cflags)","$(CFLAGS)") |
Arnaud Lacombe | 49c57d2 | 2011-08-15 01:07:13 -0400 | [diff] [blame] | 49 | $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y) |
Sam Ravnborg | 0c53c8e | 2007-10-14 22:26:53 +0200 | [diff] [blame] | 50 | endif |
| 51 | endif |
Borislav Petkov | 4a5838a | 2011-03-01 09:35:29 +0100 | [diff] [blame] | 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | include scripts/Makefile.lib |
| 54 | |
| 55 | ifdef host-progs |
| 56 | ifneq ($(hostprogs-y),$(host-progs)) |
| 57 | $(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) |
| 58 | hostprogs-y += $(host-progs) |
| 59 | endif |
| 60 | endif |
| 61 | |
Robert P. J. Day | 3156fd0 | 2008-02-18 04:48:20 -0500 | [diff] [blame] | 62 | # Do not include host rules unless needed |
Emese Revfy | 2440387 | 2016-05-24 00:08:25 +0200 | [diff] [blame] | 63 | ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | include scripts/Makefile.host |
| 65 | endif |
| 66 | |
Puja Gupta | 7900b19 | 2017-02-10 14:52:32 -0800 | [diff] [blame] | 67 | # Do not include host rules unless needed |
| 68 | ifneq ($(dtbo-y),) |
| 69 | include scripts/Makefile.dtbo |
| 70 | endif |
| 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | ifneq ($(KBUILD_SRC),) |
| 73 | # Create output directory if not already present |
| 74 | _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) |
| 75 | |
| 76 | # Create directories for object files if directory does not exist |
| 77 | # Needed when obj-y := dir/file.o syntax is used |
| 78 | _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) |
| 79 | endif |
| 80 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | ifndef obj |
| 82 | $(warning kbuild: Makefile.build is included improperly) |
| 83 | endif |
| 84 | |
| 85 | # =========================================================================== |
| 86 | |
Masahiro Yamada | a4954fd | 2014-09-09 19:26:21 +0900 | [diff] [blame] | 87 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | lib-target := $(obj)/lib.a |
Al Viro | 7f2084f | 2016-01-15 14:01:22 -0500 | [diff] [blame] | 89 | obj-y += $(obj)/lib-ksyms.o |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | endif |
| 91 | |
Masahiro Yamada | a4954fd | 2014-09-09 19:26:21 +0900 | [diff] [blame] | 92 | ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | builtin-target := $(obj)/built-in.o |
| 94 | endif |
| 95 | |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 96 | modorder-target := $(obj)/modules.order |
| 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | # We keep a list of all modules in $(MODVERDIR) |
| 99 | |
| 100 | __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 101 | $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | $(subdir-ym) $(always) |
| 103 | @: |
| 104 | |
| 105 | # Linus' kernel sanity checking tool |
| 106 | ifneq ($(KBUILD_CHECKSRC),0) |
| 107 | ifeq ($(KBUILD_CHECKSRC),2) |
| 108 | quiet_cmd_force_checksrc = CHECK $< |
| 109 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
| 110 | else |
| 111 | quiet_cmd_checksrc = CHECK $< |
| 112 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
| 113 | endif |
| 114 | endif |
| 115 | |
Sam Ravnborg | 91341d4 | 2008-01-21 21:31:44 +0100 | [diff] [blame] | 116 | # Do section mismatch analysis for each module/built-in.o |
| 117 | ifdef CONFIG_DEBUG_SECTION_MISMATCH |
| 118 | cmd_secanalysis = ; scripts/mod/modpost $@ |
| 119 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
| 121 | # Compile C sources (.c) |
| 122 | # --------------------------------------------------------------------------- |
| 123 | |
| 124 | # Default is built-in, unless we know otherwise |
Sam Ravnborg | 6588169 | 2010-07-28 17:33:09 +0200 | [diff] [blame] | 125 | modkern_cflags = \ |
| 126 | $(if $(part-of-module), \ |
| 127 | $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ |
Sam Ravnborg | 80c00ba | 2010-07-28 19:11:27 +0200 | [diff] [blame] | 128 | $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | quiet_modtag := $(empty) $(empty) |
| 130 | |
Shaohua Li | 18c167f | 2009-01-12 10:00:51 +0800 | [diff] [blame] | 131 | $(real-objs-m) : part-of-module := y |
| 132 | $(real-objs-m:.o=.i) : part-of-module := y |
| 133 | $(real-objs-m:.o=.s) : part-of-module := y |
| 134 | $(real-objs-m:.o=.lst): part-of-module := y |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
| 136 | $(real-objs-m) : quiet_modtag := [M] |
| 137 | $(real-objs-m:.o=.i) : quiet_modtag := [M] |
| 138 | $(real-objs-m:.o=.s) : quiet_modtag := [M] |
| 139 | $(real-objs-m:.o=.lst): quiet_modtag := [M] |
| 140 | |
| 141 | $(obj-m) : quiet_modtag := [M] |
| 142 | |
| 143 | # Default for not multi-part modules |
Sam Ravnborg | 5e8d780 | 2006-07-01 09:58:02 +0200 | [diff] [blame] | 144 | modname = $(basetarget) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
| 146 | $(multi-objs-m) : modname = $(modname-multi) |
| 147 | $(multi-objs-m:.o=.i) : modname = $(modname-multi) |
| 148 | $(multi-objs-m:.o=.s) : modname = $(modname-multi) |
| 149 | $(multi-objs-m:.o=.lst) : modname = $(modname-multi) |
| 150 | $(multi-objs-y) : modname = $(modname-multi) |
| 151 | $(multi-objs-y:.o=.i) : modname = $(modname-multi) |
| 152 | $(multi-objs-y:.o=.s) : modname = $(modname-multi) |
| 153 | $(multi-objs-y:.o=.lst) : modname = $(modname-multi) |
| 154 | |
| 155 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ |
Andi Kleen | 1e64ff4 | 2014-02-08 09:01:15 +0100 | [diff] [blame] | 156 | 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] | 157 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 158 | $(obj)/%.s: $(src)/%.c FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | $(call if_changed_dep,cc_s_c) |
| 160 | |
Masahiro Yamada | 23d4384 | 2016-04-08 11:24:47 +0900 | [diff] [blame] | 161 | quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@ |
| 162 | cmd_cpp_i_c = $(CPP) $(c_flags) -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 164 | $(obj)/%.i: $(src)/%.c FORCE |
Masahiro Yamada | 23d4384 | 2016-04-08 11:24:47 +0900 | [diff] [blame] | 165 | $(call if_changed_dep,cpp_i_c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 167 | # These mirror gensymtypes_S and co below, keep them in synch. |
| 168 | cmd_gensymtypes_c = \ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 169 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
James Hogan | d70f82a | 2013-03-18 19:38:56 +1030 | [diff] [blame] | 170 | $(GENKSYMS) $(if $(1), -T $(2)) \ |
| 171 | $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 172 | $(if $(KBUILD_PRESERVE),-p) \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 173 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 174 | |
Andreas Gruenbacher | 15fde67 | 2006-05-09 20:37:30 +0200 | [diff] [blame] | 175 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 176 | cmd_cc_symtypes_c = \ |
| 177 | set -e; \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 178 | $(call cmd_gensymtypes_c,true,$@) >/dev/null; \ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 179 | test -s $@ || rm -f $@ |
Andreas Gruenbacher | 15fde67 | 2006-05-09 20:37:30 +0200 | [diff] [blame] | 180 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 181 | $(obj)/%.symtypes : $(src)/%.c FORCE |
Andreas Gruenbacher | 64e6c1e | 2008-12-01 14:21:01 -0800 | [diff] [blame] | 182 | $(call cmd,cc_symtypes_c) |
Andreas Gruenbacher | 15fde67 | 2006-05-09 20:37:30 +0200 | [diff] [blame] | 183 | |
VinÃcius Tinti | 30c02b6 | 2017-04-24 13:04:58 -0700 | [diff] [blame] | 184 | # LLVM assembly |
| 185 | # Generate .ll files from .c |
| 186 | quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@ |
| 187 | cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $< |
| 188 | |
| 189 | $(obj)/%.ll: $(src)/%.c FORCE |
| 190 | $(call if_changed_dep,cc_ll_c) |
| 191 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | # C (.c) files |
| 193 | # The C file is compiled and updated dependency information is generated. |
| 194 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) |
| 195 | |
| 196 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ |
| 197 | |
| 198 | ifndef CONFIG_MODVERSIONS |
| 199 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
| 200 | |
| 201 | else |
| 202 | # When module versioning is enabled the following steps are executed: |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 203 | # o compile a .tmp_<file>.o from <file>.c |
| 204 | # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does |
| 205 | # 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] | 206 | # are done. |
| 207 | # o otherwise, we calculate symbol versions using the good old |
| 208 | # genksyms on the preprocessed source and postprocess them in a way |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 209 | # that they are usable as a linker script |
| 210 | # o generate <file>.o from .tmp_<file>.o using the linker to |
| 211 | # replace the unresolved symbols __crc_exported_symbol with |
| 212 | # the actual value of the checksum generated by genksyms |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 214 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 215 | |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame] | 216 | ifdef CONFIG_LTO_CLANG |
| 217 | # Generate .o.symversions files for each .o with exported symbols, and link these |
| 218 | # to the kernel and/or modules at the end. |
| 219 | cmd_modversions_c = \ |
| 220 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) >/dev/null 2>/dev/null; then \ |
| 221 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
| 222 | $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
| 223 | > $(@D)/$(@F).symversions; \ |
| 224 | fi; \ |
| 225 | else \ |
| 226 | if $(LLVM_DIS) -o=- $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
| 227 | $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
| 228 | > $(@D)/$(@F).symversions; \ |
| 229 | fi; \ |
| 230 | fi; \ |
| 231 | mv -f $(@D)/.tmp_$(@F) $@; |
| 232 | else |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 233 | cmd_modversions_c = \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 234 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 235 | $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 236 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
| 237 | \ |
| 238 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ |
| 239 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
| 240 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ |
| 241 | else \ |
| 242 | mv -f $(@D)/.tmp_$(@F) $@; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | fi; |
| 244 | endif |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame] | 245 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
Steven Rostedt | 8da3821 | 2008-08-14 15:45:07 -0400 | [diff] [blame] | 247 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
Vasily Gorbik | 3f50dfb | 2018-08-06 15:17:44 +0200 | [diff] [blame] | 248 | ifndef CC_USING_RECORD_MCOUNT |
| 249 | # compiler will not generate __mcount_loc use recordmcount or recordmcount.pl |
Steven Rostedt | 72441cb | 2010-10-13 17:12:30 -0400 | [diff] [blame] | 250 | ifdef BUILD_C_RECORDMCOUNT |
Steven Rostedt | 85356f8 | 2011-04-12 18:59:10 -0400 | [diff] [blame] | 251 | ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") |
| 252 | RECORDMCOUNT_FLAGS = -w |
| 253 | endif |
Sami Tolvanen | 7bd125e | 2017-06-16 12:52:57 -0700 | [diff] [blame] | 254 | |
| 255 | ifdef CONFIG_LTO_CLANG |
| 256 | # With LTO, we postpone running recordmcount until after the LTO link step, so |
| 257 | # let's export the parameters for the link script. |
| 258 | export RECORDMCOUNT_FLAGS |
| 259 | else |
Steven Rostedt | d7b4d6d | 2010-10-18 14:42:00 -0400 | [diff] [blame] | 260 | # Due to recursion, we must skip empty.o. |
| 261 | # The empty.o file is created in the make process in order to determine |
| 262 | # the target endianness and word size. It is made before all other C |
| 263 | # files, including recordmcount. |
Wu Zhangjin | 4567745 | 2010-10-28 00:24:34 +0800 | [diff] [blame] | 264 | sub_cmd_record_mcount = \ |
| 265 | if [ $(@) != "scripts/mod/empty.o" ]; then \ |
Steven Rostedt | 85356f8 | 2011-04-12 18:59:10 -0400 | [diff] [blame] | 266 | $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ |
Wu Zhangjin | 4567745 | 2010-10-28 00:24:34 +0800 | [diff] [blame] | 267 | fi; |
Sami Tolvanen | 7bd125e | 2017-06-16 12:52:57 -0700 | [diff] [blame] | 268 | endif |
| 269 | |
Michal Marek | d697182 | 2011-05-17 15:36:46 +0200 | [diff] [blame] | 270 | recordmcount_source := $(srctree)/scripts/recordmcount.c \ |
| 271 | $(srctree)/scripts/recordmcount.h |
Sami Tolvanen | 7bd125e | 2017-06-16 12:52:57 -0700 | [diff] [blame] | 272 | else # !BUILD_C_RECORDMCOUNT |
Wu Zhangjin | 4567745 | 2010-10-28 00:24:34 +0800 | [diff] [blame] | 273 | sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
Wu Zhangjin | e6299d2 | 2009-11-20 20:34:31 +0800 | [diff] [blame] | 274 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
Steven Rostedt | b3acf29 | 2008-10-29 15:30:26 -0400 | [diff] [blame] | 275 | "$(if $(CONFIG_64BIT),64,32)" \ |
Rabin Vincent | f9810a8 | 2010-08-10 19:39:20 +0100 | [diff] [blame] | 276 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ |
| 277 | "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ |
Shaohua Li | 18c167f | 2009-01-12 10:00:51 +0800 | [diff] [blame] | 278 | "$(if $(part-of-module),1,0)" "$(@)"; |
Sami Tolvanen | 7bd125e | 2017-06-16 12:52:57 -0700 | [diff] [blame] | 279 | |
Michal Marek | d697182 | 2011-05-17 15:36:46 +0200 | [diff] [blame] | 280 | recordmcount_source := $(srctree)/scripts/recordmcount.pl |
Sami Tolvanen | 7bd125e | 2017-06-16 12:52:57 -0700 | [diff] [blame] | 281 | endif # BUILD_C_RECORDMCOUNT |
| 282 | |
| 283 | ifndef CONFIG_LTO_CLANG |
Heiko Carstens | c0a80c0 | 2015-01-09 13:06:33 +0100 | [diff] [blame] | 284 | cmd_record_mcount = \ |
| 285 | if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \ |
| 286 | "$(CC_FLAGS_FTRACE)" ]; then \ |
Wu Zhangjin | 4567745 | 2010-10-28 00:24:34 +0800 | [diff] [blame] | 287 | $(sub_cmd_record_mcount) \ |
| 288 | fi; |
Vasily Gorbik | 3f50dfb | 2018-08-06 15:17:44 +0200 | [diff] [blame] | 289 | endif # CC_USING_RECORD_MCOUNT |
Steven Rostedt | 72441cb | 2010-10-13 17:12:30 -0400 | [diff] [blame] | 290 | endif |
Sami Tolvanen | 7bd125e | 2017-06-16 12:52:57 -0700 | [diff] [blame] | 291 | endif # CONFIG_FTRACE_MCOUNT_RECORD |
Steven Rostedt | 8da3821 | 2008-08-14 15:45:07 -0400 | [diff] [blame] | 292 | |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 293 | ifdef CONFIG_STACK_VALIDATION |
Josh Poimboeuf | 3b27a0c | 2016-03-03 11:39:30 -0600 | [diff] [blame] | 294 | ifneq ($(SKIP_STACK_VALIDATION),1) |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 295 | |
| 296 | __objtool_obj := $(objtree)/tools/objtool/objtool |
| 297 | |
| 298 | objtool_args = check |
| 299 | ifndef CONFIG_FRAME_POINTER |
| 300 | objtool_args += --no-fp |
| 301 | endif |
Josh Poimboeuf | 23873ae | 2017-07-24 18:34:14 -0500 | [diff] [blame] | 302 | ifdef CONFIG_GCOV_KERNEL |
| 303 | objtool_args += --no-unreachable |
| 304 | endif |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 305 | |
| 306 | # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory |
| 307 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file |
| 308 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file |
| 309 | cmd_objtool = $(if $(patsubst y%,, \ |
| 310 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ |
| 311 | $(__objtool_obj) $(objtool_args) "$(@)";) |
| 312 | objtool_obj = $(if $(patsubst y%,, \ |
| 313 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ |
| 314 | $(__objtool_obj)) |
| 315 | |
Josh Poimboeuf | 3b27a0c | 2016-03-03 11:39:30 -0600 | [diff] [blame] | 316 | endif # SKIP_STACK_VALIDATION |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 317 | endif # CONFIG_STACK_VALIDATION |
| 318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | define rule_cc_o_c |
Jan Beulich | 6176aa9 | 2006-01-30 10:04:27 +0100 | [diff] [blame] | 320 | $(call echo-cmd,checksrc) $(cmd_checksrc) \ |
Nicolas Pitre | e4aca45 | 2016-02-17 15:50:06 -0500 | [diff] [blame] | 321 | $(call cmd_and_fixdep,cc_o_c) \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 322 | $(cmd_modversions_c) \ |
Nicolas Pitre | e4aca45 | 2016-02-17 15:50:06 -0500 | [diff] [blame] | 323 | $(cmd_objtool) \ |
| 324 | $(call echo-cmd,record_mcount) $(cmd_record_mcount) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | endef |
| 326 | |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 327 | define rule_as_o_S |
Nicolas Pitre | e4aca45 | 2016-02-17 15:50:06 -0500 | [diff] [blame] | 328 | $(call cmd_and_fixdep,as_o_S) \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 329 | $(cmd_modversions_S) \ |
Nicolas Pitre | e4aca45 | 2016-02-17 15:50:06 -0500 | [diff] [blame] | 330 | $(cmd_objtool) |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 331 | endef |
| 332 | |
Nicolas Pitre | 9895c03 | 2016-01-21 17:07:24 -0500 | [diff] [blame] | 333 | # List module undefined symbols (or empty line if not enabled) |
| 334 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
| 335 | cmd_undef_syms = $(NM) $@ | sed -n 's/^ \+U //p' | xargs echo |
| 336 | else |
| 337 | cmd_undef_syms = echo |
| 338 | endif |
| 339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | # Built-in and composite module parts |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 341 | $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_obj) FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | $(call cmd,force_checksrc) |
| 343 | $(call if_changed_rule,cc_o_c) |
| 344 | |
| 345 | # Single-part modules are special since we need to mark them in $(MODVERDIR) |
| 346 | |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 347 | $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_obj) FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | $(call cmd,force_checksrc) |
| 349 | $(call if_changed_rule,cc_o_c) |
Nicolas Pitre | 9895c03 | 2016-01-21 17:07:24 -0500 | [diff] [blame] | 350 | @{ echo $(@:.o=.ko); echo $@; \ |
| 351 | $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | |
| 353 | quiet_cmd_cc_lst_c = MKLST $@ |
| 354 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ |
| 355 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ |
| 356 | System.map $(OBJDUMP) > $@ |
| 357 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 358 | $(obj)/%.lst: $(src)/%.c FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | $(call if_changed_dep,cc_lst_c) |
| 360 | |
| 361 | # Compile assembler sources (.S) |
| 362 | # --------------------------------------------------------------------------- |
| 363 | |
Sam Ravnborg | 80c00ba | 2010-07-28 19:11:27 +0200 | [diff] [blame] | 364 | modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
Sam Ravnborg | 6588169 | 2010-07-28 17:33:09 +0200 | [diff] [blame] | 366 | $(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
| 367 | $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 369 | # .S file exports must have their C prototypes defined in asm/asm-prototypes.h |
| 370 | # or a file that it includes, in order to get versioned symbols. We build a |
| 371 | # dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from |
| 372 | # the .S file (with trailing ';'), and run genksyms on that, to extract vers. |
| 373 | # |
| 374 | # This is convoluted. The .S file must first be preprocessed to run guards and |
| 375 | # expand names, then the resulting exports must be constructed into plain |
| 376 | # EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed |
| 377 | # to make the genksyms input. |
| 378 | # |
| 379 | # These mirror gensymtypes_c and co above, keep them in synch. |
| 380 | cmd_gensymtypes_S = \ |
| 381 | (echo "\#include <linux/kernel.h>" ; \ |
| 382 | echo "\#include <asm/asm-prototypes.h>" ; \ |
| 383 | $(CPP) $(a_flags) $< | \ |
Nicholas Piggin | cc6acc1 | 2016-11-09 15:34:05 +1100 | [diff] [blame] | 384 | grep "\<___EXPORT_SYMBOL\>" | \ |
| 385 | 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] | 386 | $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \ |
| 387 | $(GENKSYMS) $(if $(1), -T $(2)) \ |
| 388 | $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \ |
| 389 | $(if $(KBUILD_PRESERVE),-p) \ |
| 390 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
| 391 | |
| 392 | quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@ |
| 393 | cmd_cc_symtypes_S = \ |
| 394 | set -e; \ |
| 395 | $(call cmd_gensymtypes_S,true,$@) >/dev/null; \ |
| 396 | test -s $@ || rm -f $@ |
| 397 | |
| 398 | $(obj)/%.symtypes : $(src)/%.S FORCE |
| 399 | $(call cmd,cc_symtypes_S) |
| 400 | |
| 401 | |
Masahiro Yamada | e0f41e5 | 2016-04-08 11:24:48 +0900 | [diff] [blame] | 402 | quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@ |
| 403 | cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 405 | $(obj)/%.s: $(src)/%.S FORCE |
Masahiro Yamada | e0f41e5 | 2016-04-08 11:24:48 +0900 | [diff] [blame] | 406 | $(call if_changed_dep,cpp_s_S) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
| 408 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 409 | |
| 410 | ifndef CONFIG_MODVERSIONS |
| 411 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
| 412 | |
| 413 | else |
| 414 | |
| 415 | ASM_PROTOTYPES := $(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/asm-prototypes.h) |
| 416 | |
| 417 | ifeq ($(ASM_PROTOTYPES),) |
| 418 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
| 419 | |
| 420 | else |
| 421 | |
| 422 | # versioning matches the C process described above, with difference that |
| 423 | # we parse asm-prototypes.h C header to get function definitions. |
| 424 | |
| 425 | cmd_as_o_S = $(CC) $(a_flags) -c -o $(@D)/.tmp_$(@F) $< |
| 426 | |
| 427 | cmd_modversions_S = \ |
| 428 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
| 429 | $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
| 430 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
| 431 | \ |
| 432 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ |
| 433 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
| 434 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ |
| 435 | else \ |
| 436 | mv -f $(@D)/.tmp_$(@F) $@; \ |
| 437 | fi; |
| 438 | endif |
| 439 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 441 | $(obj)/%.o: $(src)/%.S $(objtool_obj) FORCE |
| 442 | $(call if_changed_rule,as_o_S) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
| 444 | targets += $(real-objs-y) $(real-objs-m) $(lib-y) |
| 445 | targets += $(extra-y) $(MAKECMDGOALS) $(always) |
| 446 | |
| 447 | # Linker scripts preprocessor (.lds.S -> .lds) |
| 448 | # --------------------------------------------------------------------------- |
| 449 | quiet_cmd_cpp_lds_S = LDS $@ |
Sam Ravnborg | 51b563f | 2009-09-20 12:28:22 +0200 | [diff] [blame] | 450 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ |
Tim Abbott | 42f29a2 | 2009-09-20 18:14:12 -0400 | [diff] [blame] | 451 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 453 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | $(call if_changed_dep,cpp_lds_S) |
| 455 | |
David Howells | 4520c6a | 2012-09-21 23:31:13 +0100 | [diff] [blame] | 456 | # ASN.1 grammar |
| 457 | # --------------------------------------------------------------------------- |
| 458 | quiet_cmd_asn1_compiler = ASN.1 $@ |
| 459 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ |
| 460 | $(subst .h,.c,$@) $(subst .c,.h,$@) |
| 461 | |
| 462 | .PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h |
| 463 | |
| 464 | $(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler |
| 465 | $(call cmd,asn1_compiler) |
| 466 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | # Build the compiled-in targets |
| 468 | # --------------------------------------------------------------------------- |
| 469 | |
| 470 | # To build objects in subdirs, we need to descend into the directories |
| 471 | $(sort $(subdir-obj-y)): $(subdir-ym) ; |
| 472 | |
| 473 | # |
| 474 | # Rule to compile a set of .o files into one .o file |
| 475 | # |
| 476 | ifdef builtin-target |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 477 | |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame] | 478 | ifdef CONFIG_LTO_CLANG |
| 479 | ifdef CONFIG_MODVERSIONS |
| 480 | # combine symversions for later processing |
| 481 | update_lto_symversions = \ |
| 482 | rm -f $@.symversions; \ |
| 483 | for i in $(filter-out FORCE,$^); do \ |
| 484 | if [ -f $$i.symversions ]; then \ |
| 485 | cat $$i.symversions \ |
| 486 | >> $@.symversions; \ |
| 487 | fi; \ |
| 488 | done; |
| 489 | endif |
| 490 | # rebuild the symbol table with llvm-ar to include IR files |
| 491 | update_lto_symtable = ; \ |
| 492 | mv -f $@ $@.tmp; \ |
| 493 | $(LLVM_AR) rcsT$(KBUILD_ARFLAGS) $@ \ |
| 494 | $$($(AR) t $@.tmp); \ |
| 495 | rm -f $@.tmp |
| 496 | endif |
| 497 | |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 498 | ifdef CONFIG_THIN_ARCHIVES |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame] | 499 | cmd_make_builtin = $(update_lto_symversions) \ |
| 500 | rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) |
| 501 | cmd_make_empty_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 502 | quiet_cmd_link_o_target = AR $@ |
| 503 | else |
| 504 | cmd_make_builtin = $(LD) $(ld_flags) -r -o |
| 505 | cmd_make_empty_builtin = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) |
| 506 | quiet_cmd_link_o_target = LD $@ |
| 507 | endif |
| 508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | # If the list of objects to link is empty, just create an empty built-in.o |
| 510 | cmd_link_o_target = $(if $(strip $(obj-y)),\ |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 511 | $(cmd_make_builtin) $@ $(filter $(obj-y), $^) \ |
Sam Ravnborg | 91341d4 | 2008-01-21 21:31:44 +0100 | [diff] [blame] | 512 | $(cmd_secanalysis),\ |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 513 | $(cmd_make_empty_builtin) $@) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | |
| 515 | $(builtin-target): $(obj-y) FORCE |
| 516 | $(call if_changed,link_o_target) |
| 517 | |
| 518 | targets += $(builtin-target) |
| 519 | endif # builtin-target |
| 520 | |
| 521 | # |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 522 | # Rule to create modules.order file |
| 523 | # |
| 524 | # Create commands to either record .ko file or cat modules.order from |
| 525 | # a subdirectory |
| 526 | modorder-cmds = \ |
| 527 | $(foreach m, $(modorder), \ |
| 528 | $(if $(filter %/modules.order, $m), \ |
| 529 | cat $m;, echo kernel/$m;)) |
| 530 | |
| 531 | $(modorder-target): $(subdir-ym) FORCE |
| 532 | $(Q)(cat /dev/null; $(modorder-cmds)) > $@ |
| 533 | |
| 534 | # |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | # Rule to compile a set of .o files into one .a file |
| 536 | # |
| 537 | ifdef lib-target |
| 538 | quiet_cmd_link_l_target = AR $@ |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 539 | |
| 540 | ifdef CONFIG_THIN_ARCHIVES |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame] | 541 | cmd_link_l_target = \ |
| 542 | $(update_lto_symversions) \ |
| 543 | rm -f $@; \ |
| 544 | $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(lib-y) \ |
| 545 | $(update_lto_symtable) |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 546 | else |
| 547 | cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y) |
| 548 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
| 550 | $(lib-target): $(lib-y) FORCE |
| 551 | $(call if_changed,link_l_target) |
| 552 | |
| 553 | targets += $(lib-target) |
Al Viro | 7f2084f | 2016-01-15 14:01:22 -0500 | [diff] [blame] | 554 | |
| 555 | dummy-object = $(obj)/.lib_exports.o |
| 556 | ksyms-lds = $(dot-target).lds |
| 557 | ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX |
| 558 | ref_prefix = EXTERN(_ |
| 559 | else |
| 560 | ref_prefix = EXTERN( |
| 561 | endif |
| 562 | |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame] | 563 | filter_export_list = sed -ne '/___ksymtab/s/.*+\([^ "]*\).*/$(ref_prefix)\1)/p' |
| 564 | link_export_list = rm -f $(dummy-object);\ |
| 565 | echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\ |
Al Viro | 7f2084f | 2016-01-15 14:01:22 -0500 | [diff] [blame] | 566 | $(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\ |
| 567 | rm $(dummy-object) $(ksyms-lds) |
| 568 | |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame] | 569 | quiet_cmd_export_list = EXPORTS $@ |
| 570 | |
| 571 | ifdef CONFIG_LTO_CLANG |
| 572 | # objdump doesn't understand IR files and llvm-dis doesn't support archives, |
| 573 | # so we'll walk through each file in the archive separately |
| 574 | cmd_export_list = \ |
| 575 | rm -f $(ksyms-lds); \ |
| 576 | for o in $$($(AR) t $<); do \ |
| 577 | if $(OBJDUMP) -h $$o >/dev/null 2>/dev/null; then \ |
| 578 | $(OBJDUMP) -h $$o | \ |
| 579 | $(filter_export_list) \ |
| 580 | >>$(ksyms-lds); \ |
| 581 | else \ |
| 582 | $(LLVM_DIS) -o=- $$o | \ |
| 583 | $(filter_export_list) \ |
| 584 | >>$(ksyms-lds); \ |
| 585 | fi; \ |
| 586 | done; \ |
| 587 | $(link_export_list) |
| 588 | else |
| 589 | cmd_export_list = $(OBJDUMP) -h $< | $(filter_export_list) >$(ksyms-lds); \ |
| 590 | $(link_export_list) |
| 591 | endif |
| 592 | |
Al Viro | 7f2084f | 2016-01-15 14:01:22 -0500 | [diff] [blame] | 593 | $(obj)/lib-ksyms.o: $(lib-target) FORCE |
| 594 | $(call if_changed,export_list) |
Nicholas Piggin | 989cea5c | 2016-10-21 01:13:33 +1100 | [diff] [blame] | 595 | |
| 596 | targets += $(obj)/lib-ksyms.o |
| 597 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | endif |
| 599 | |
| 600 | # |
| 601 | # Rule to link composite objects |
| 602 | # |
| 603 | # Composite objects are specified in kbuild makefile as follows: |
| 604 | # <composite-object>-objs := <list of .o files> |
| 605 | # or |
| 606 | # <composite-object>-y := <list of .o files> |
Michal Marek | cf4f219 | 2015-10-27 14:02:24 +0100 | [diff] [blame] | 607 | # or |
| 608 | # <composite-object>-m := <list of .o files> |
| 609 | # The -m syntax only works if <composite object> is a module |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | link_multi_deps = \ |
| 611 | $(filter $(addprefix $(obj)/, \ |
| 612 | $($(subst $(obj)/,,$(@:.o=-objs))) \ |
Michal Marek | cf4f219 | 2015-10-27 14:02:24 +0100 | [diff] [blame] | 613 | $($(subst $(obj)/,,$(@:.o=-y))) \ |
| 614 | $($(subst $(obj)/,,$(@:.o=-m)))), $^) |
Masahiro Yamada | 38385f8 | 2014-04-28 16:26:18 +0900 | [diff] [blame] | 615 | |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame] | 616 | cmd_link_multi-link = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) |
| 617 | |
| 618 | ifdef CONFIG_THIN_ARCHIVES |
| 619 | quiet_cmd_link_multi-y = AR $@ |
| 620 | cmd_link_multi-y = $(update_lto_symversions) \ |
| 621 | rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(link_multi_deps) \ |
| 622 | $(update_lto_symtable) |
| 623 | else |
| 624 | quiet_cmd_link_multi-y = LD $@ |
| 625 | cmd_link_multi-y = $(cmd_link_multi-link) |
| 626 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | |
| 628 | quiet_cmd_link_multi-m = LD [M] $@ |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame] | 629 | |
| 630 | ifdef CONFIG_LTO_CLANG |
| 631 | # don't compile IR until needed |
| 632 | cmd_link_multi-m = $(cmd_link_multi-y) |
| 633 | else |
| 634 | cmd_link_multi-m = $(cmd_link_multi-link) |
| 635 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | |
Masahiro Yamada | c8589d1 | 2014-08-19 16:34:20 +0900 | [diff] [blame] | 637 | $(multi-used-y): FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | $(call if_changed,link_multi-y) |
| 639 | |
Masahiro Yamada | c8589d1 | 2014-08-19 16:34:20 +0900 | [diff] [blame] | 640 | $(multi-used-m): FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | $(call if_changed,link_multi-m) |
Nicolas Pitre | 9895c03 | 2016-01-21 17:07:24 -0500 | [diff] [blame] | 642 | @{ echo $(@:.o=.ko); echo $(link_multi_deps); \ |
| 643 | $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) |
Sami Tolvanen | 475bdd7 | 2017-11-28 08:48:49 -0800 | [diff] [blame] | 644 | |
| 645 | $(call multi_depend, $(multi-used-y), .o, -objs -y) |
Michal Marek | cf4f219 | 2015-10-27 14:02:24 +0100 | [diff] [blame] | 646 | $(call multi_depend, $(multi-used-m), .o, -objs -y -m) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | |
| 648 | targets += $(multi-used-y) $(multi-used-m) |
| 649 | |
| 650 | |
| 651 | # Descending |
| 652 | # --------------------------------------------------------------------------- |
| 653 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 654 | PHONY += $(subdir-ym) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | $(subdir-ym): |
| 656 | $(Q)$(MAKE) $(build)=$@ |
| 657 | |
| 658 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
| 659 | # --------------------------------------------------------------------------- |
| 660 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 661 | PHONY += FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | |
| 663 | FORCE: |
| 664 | |
| 665 | # Read all saved command lines and dependencies for the $(targets) we |
| 666 | # may be building above, using $(if_changed{,_dep}). As an |
| 667 | # optimization, we don't need to read them if the target does not |
| 668 | # exist, we will rebuild anyway in that case. |
| 669 | |
| 670 | targets := $(wildcard $(sort $(targets))) |
| 671 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
| 672 | |
| 673 | ifneq ($(cmd_files),) |
| 674 | include $(cmd_files) |
| 675 | endif |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 676 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 677 | # Declare the contents of the .PHONY variable as phony. We keep that |
| 678 | # information in a variable se we can use it in if_changed and friends. |
| 679 | |
| 680 | .PHONY: $(PHONY) |