Makefile.ksplice

   1 ksplice-makefile := $(word $(words $(MAKEFILE_LIST)), $(MAKEFILE_LIST))
   2 ksplice-script = $(dir $(ksplice-makefile))ksplice-obj.pl
   3
   4 KSPLICE_MODE ?= diff
   5 $(if $(filter_out snap diff revert modinst,$(KSPLICE_MODE)), \
   6   $(error Invalid KSPLICE_MODE $(KSPLICE_MODE).))
   7
   8 KSPLICE_ONLY_TARGETS ?= %
   9
  10 PHONY :=
  11
  12 __ksplice:
  13
  14 ksplice-extra = $(filter $(KSPLICE_EXTRA_MATCH),$(lib-y) $(real-objs-m) $(real-objs-y))
  15 ksplice-objs = $(foreach o,$(1),$(o:=.KSPLICE) $(addsuffix .KSPLICE_helper,$(filter $(ksplice-extra),$(o))))
  16
  17 escsq ?= $(subst ','\'',$(1))
  18 echo-cmd ?= $(if $($(quiet)cmd_$(1)),echo '  $(call escsq,$($(quiet)cmd_$(1)))';)
  19
  20 quiet_cmd_ksplice-combine = COMBINE $(@:.KSPLICE=)
  21 cmd_ksplice-combine = $(ksplice-script) combine $@ $(filter $(call ksplice-objs,$(ksplice-link-deps)),$^)
  22 quiet_cmd_ksplice-snap = SNAP    $(@:.KSPLICE=)
  23 cmd_ksplice-snap = $(ksplice-script) snap $@
  24 quiet_cmd_ksplice-diff = DIFF    $(@:.KSPLICE=)
  25 cmd_ksplice-diff = $(ksplice-script) diff $@
  26 quiet_cmd_ksplice-ignore = IGNORE  $(@:.KSPLICE=)
  27 cmd_ksplice-ignore = touch $@
  28 quiet_cmd_ksplice-cow = COW     $@
  29 cmd_ksplice-cow = cp -a $@ $@.KSPLICE_pre
  30 quiet_cmd_ksplice-mod = MOD     $(@:$(KSPLICE_KMODSRC)/%.mod.KSPLICE=%)
  31 cmd_ksplice-mod = echo $(<:.o.KSPLICE=) > $@; cp -a $< $(<:.KSPLICE=.KSPLICE_primary) $(<:.KSPLICE=.KSPLICE_helper) $(KSPLICE_KMODSRC)/
  32 rule_ksplice-mod = if [ -s $< ]; then $(echo-cmd) $(cmd_$(1)); fi
  33 quiet_cmd_ksplice-helper = HELPER  $(@:.KSPLICE_helper=)
  34 cmd_ksplice-helper = $(ksplice-script) helper $@
  35 quiet_cmd_ksplice-freeze = FREEZE  $(@:_ksplice-revert_%.KSPLICE_pre=%)
  36 cmd_ksplice-freeze = rm -f $(@:_ksplice-revert_%=%)
  37 quiet_cmd_ksplice-revert = REVERT  $(@:_ksplice-revert_%.KSPLICE_pre=%)
  38 cmd_ksplice-revert = mv $(@:_ksplice-revert_%=%) $(@:_ksplice-revert_%.KSPLICE_pre=%)
  39 quiet_cmd_ksplice-revert-snap = SNAP    $(@:_ksplice-revert-snap_%.KSPLICE=%)
  40 cmd_ksplice-revert-snap = $(ksplice-script) snap $(@:_ksplice-revert-snap_%=%)
  41 quiet_cmd_ksplice-clean = CLEAN   $(@:_ksplice-clean_%=%)
  42 cmd_ksplice-clean = rm -f $(@:_ksplice-clean_%=%)
  43
  44 ifeq ($(obj),)
  45
  46 ifneq ($(wildcard include/linux/compile.h),)
  47 MAKE += --old-file=include/linux/compile.h
  48 endif
  49 ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
  50 # Makefile.lib must be included before Makefile because they contain
  51 # different filechk definitions in 2.6.12.
  52 include $(if $(KBUILD_SRC),$(KBUILD_SRC)/)scripts/Makefile.lib
  53 endif
  54 include $(if $(KBUILD_SRC),$(KBUILD_SRC)/)Makefile
  55
  56 ifneq ($(skip-makefile),)
  57
  58 PHONY += __ksplice
  59 __ksplice: FORCE
  60         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  61         KBUILD_SRC=$(CURDIR) \
  62         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(ksplice-makefile) \
  63         $(if $(wildcard $(KBUILD_OUTPUT)/include/config/kernel.release),--old-file=include/config/kernel.release)
  64
  65 else    # skip-makefile
  66
  67 CC := ksplice-cc.pl $(CC)
  68 CFLAGS_KSPLICE = -ffunction-sections -fdata-sections -ksplice-cflags-api=1
  69 CFLAGS_KERNEL += $(CFLAGS_KSPLICE)
  70 CFLAGS_MODULE += $(CFLAGS_KSPLICE)
  71
  72 ifeq ($(KSPLICE_MODE),revert)
  73
  74 ksplice-dirs += $(vmlinux-alldirs:%=_ksplice_%)
  75
  76 endif   # KSPLICE_MODE
  77
  78 ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
  79
  80 ksplice-mods += vmlinux
  81 ifdef KSPLICE_BUILD_MODULES
  82 ksplice-deps += ksplice_modpost
  83 endif
  84 ksplice-dirs += $(vmlinux-dirs:%=_ksplice_%)
  85 ifeq ($(KSPLICE_MODE),snap)
  86 ksplice-before += prepare0 prepare scripts
  87 endif
  88
  89 ksplice-vmlinux-objs = $(filter-out $(head-y),$(if $(vmlinux-all),$(vmlinux-all),$(vmlinux-objs)))
  90 $(obj)/vmlinux.o.KSPLICE: ksplice-link-deps = $(ksplice-vmlinux-objs)
  91 $(obj)/vmlinux.o.KSPLICE: $(call ksplice-objs,$(ksplice-vmlinux-objs)) FORCE
  92         $(call if_changed,ksplice-combine)
  93 ksplice-targets += $(obj)/vmlinux.o.KSPLICE
  94 $(ksplice-vmlinux-objs:=.KSPLICE): $(ksplice-dirs) ;
  95
  96 PHONY += ksplice_modpost
  97 ksplice_modpost: $(ksplice-dirs)
  98         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  99
 100 endif   # KSPLICE_MODE
 101
 102 ifeq ($(KSPLICE_MODE),modinst)
 103
 104 ksplice-deps += ksplice_modinst
 105 PHONY += ksplice_modinst
 106 ksplice_modinst: $(ksplice-dirs)
 107         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 108
 109 endif   # KSPLICE_MODE
 110
 111 endif   # skip-makefile
 112
 113 else    # obj
 114
 115 ifeq ($(KSPLICE_MODE),revert)
 116
 117 -include .config        # workaround for missing obj- = subdir/ declarations
 118 include $(srctree)/scripts/Makefile.clean
 119 ksplice-dirs += $(subdir-ymn:%=_ksplice_%)
 120
 121 endif   # KSPLICE_MODE
 122
 123 ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
 124
 125 ifdef KSPLICE_BUILD_MODULES
 126 KBUILD_MODULES = 1
 127 endif
 128
 129 include $(srctree)/scripts/Makefile.build
 130 ksplice-mods += $(obj-m:.o=)
 131 ksplice-deps += $(if $(filter $(KSPLICE_ONLY_TARGETS),vmlinux),$(builtin-target:=.KSPLICE) $(lib-target:=.KSPLICE))
 132 ifdef KSPLICE_BUILD_MODULES
 133 ksplice-deps += $(obj-m)
 134 endif
 135 ksplice-dirs += $(subdir-ym:%=_ksplice_%)
 136
 137 ifdef builtin-target
 138 $(builtin-target:=.KSPLICE): ksplice-link-deps = $(obj-y)
 139 $(builtin-target:=.KSPLICE): $(call ksplice-objs,$(obj-y)) FORCE
 140         $(call if_changed,ksplice-combine)
 141 ksplice-targets += $(builtin-target:=.KSPLICE)
 142 endif
 143
 144 ifdef lib-target
 145 $(lib-target:=.KSPLICE): ksplice-link-deps = $(lib-y)
 146 $(lib-target:=.KSPLICE): $(call ksplice-objs,$(lib-y)) FORCE
 147         $(call if_changed,ksplice-combine)
 148 ksplice-targets += $(lib-target:=.KSPLICE)
 149 endif
 150
 151 $(sort $(multi-used-y:=.KSPLICE) $(multi-used-m:=.KSPLICE)): ksplice-link-deps = $($(@:$(obj)/%.o.KSPLICE=%-objs):%=$(obj)/%) $($(@:$(obj)/%.o.KSPLICE=%-y):%=$(obj)/%)
 152 $(sort $(multi-used-y:=.KSPLICE)): $(obj)/%.o.KSPLICE: $(call ksplice-objs,$(multi-objs-y)) FORCE
 153         $(call if_changed,ksplice-combine)
 154 $(sort $(multi-used-m:=.KSPLICE)): $(obj)/%.o.KSPLICE: $(call ksplice-objs,$(multi-objs-m)) FORCE
 155         $(call if_changed,ksplice-combine)
 156 ksplice-targets += $(sort $(multi-used-y:=.KSPLICE) $(multi-used-m:=.KSPLICE))
 157
 158 ifeq ($(KSPLICE_MODE),snap)
 159 $(obj)/%.o.KSPLICE: $(obj)/%.o FORCE
 160         $(if $(strip $(wildcard $<.KSPLICE_pre) $(filter $<,$?)), \
 161           $(call cmd,ksplice-snap))
 162 else
 163 $(obj)/%.o.KSPLICE: $(obj)/%.o
 164         $(call cmd,ksplice-diff)
 165 endif
 166
 167 $(obj)/%.lds.KSPLICE:
 168         $(call cmd,ksplice-ignore)
 169
 170 $(sort $(subdir-obj-y:=.KSPLICE)): $(ksplice-dirs) ;
 171
 172 endif   # KSPLICE_MODE
 173
 174 endif   # obj
 175
 176 ifeq ($(skip-makefile),)
 177
 178 ifeq ($(KSPLICE_MODE),revert)
 179
 180 ksplice-revert-obj := $(wildcard $(obj)/*.KSPLICE_pre)
 181 ksplice-revert-files := $(ksplice-revert-obj)
 182 ifneq ($(obj),$(src))
 183 ksplice-revert-files += $(wildcard $(src)/*.KSPLICE_pre)
 184 endif
 185 ksplice-revert-deps := $(ksplice-revert-files:%=_ksplice-revert_%)
 186 ksplice-deps += $(ksplice-revert-deps)
 187 PHONY += $(ksplice-revert-deps)
 188 $(ksplice-revert-deps): FORCE
 189 ifdef KSPLICE_SERIES
 190         $(call cmd,ksplice-freeze)
 191 else
 192         $(call cmd,ksplice-revert)
 193 endif
 194
 195 ksplice-revert-snap-files := $(wildcard $(ksplice-revert-obj:.KSPLICE_pre=.KSPLICE))
 196 ksplice-revert-snap-deps := $(ksplice-revert-snap-files:%=_ksplice-revert-snap_%)
 197 ksplice-deps += $(ksplice-revert-snap-deps)
 198 PHONY += $(ksplice-revert-snap-deps)
 199 $(ksplice-revert-snap-deps): $(ksplice-revert-snap-files:%.KSPLICE=_ksplice-revert_%.KSPLICE_pre) FORCE
 200         $(call cmd,ksplice-revert-snap)
 201
 202 ksplice-clean-files := $(filter-out $(ksplice-revert-snap-files:.KSPLICE_pre=.KSPLICE_primary) $(ksplice-revert-snap-files:.KSPLICE_pre=.KSPLICE_helper),$(wildcard $(obj)/*.KSPLICE_primary $(obj)/*.KSPLICE_helper))
 203 ksplice-clean-deps = $(ksplice-clean-files:%=_ksplice-clean_%)
 204 ksplice-deps += $(ksplice-clean-deps)
 205 PHONY += $(ksplice-clean-deps)
 206 $(ksplice-clean-deps): FORCE
 207         $(call cmd,ksplice-clean)
 208
 209 endif   # KSPLICE_MODE
 210
 211 ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
 212
 213 ksplice-modnames = $(filter $(KSPLICE_ONLY_TARGETS),$(notdir $(ksplice-mods)))
 214 ifdef KSPLICE_KMODSRC
 215 ksplice-deps += $(ksplice-modnames:%=$(KSPLICE_KMODSRC)/%.mod.KSPLICE)
 216 $(KSPLICE_KMODSRC)/%.mod.KSPLICE: $(obj)/%.o.KSPLICE
 217         $(Q)$(call rule_ksplice-mod,ksplice-mod)
 218 else
 219 ksplice-deps += $(ksplice-modnames:%=$(obj)/%.o.KSPLICE)
 220 endif
 221 .PRECIOUS: $(obj)/%.o.KSPLICE
 222
 223 $(obj)/%.o.KSPLICE_helper: $(obj)/%.o.KSPLICE
 224         $(call cmd,ksplice-helper)
 225
 226 ifeq ($(KSPLICE_MODE),diff)
 227
 228 define ksplice-cow-check
 229         $(if $(filter-out %.KSPLICE,$@), \
 230           $(if $(strip $(filter-out $(PHONY),$?) $(filter-out $(cmd_$(1)),$(cmd_$@)) $(filter-out $(cmd_$@),$(cmd_$(1)))), \
 231             $(if $(wildcard $@), \
 232               $(if $(wildcard $@.KSPLICE_pre),, \
 233                 $(call cmd,ksplice-cow)))))
 234
 235 endef
 236
 237 define ksplice-add-cow-check
 238 $(v) = $$(ksplice-cow-check)$(value $(v))
 239
 240 endef
 241
 242 ksplice-cow-eval += $(foreach v,if_changed if_changed_dep if_changed_rule,$(ksplice-add-cow-check))
 243
 244 endif   # KSPLICE_MODE
 245
 246 ksplice-cmd-files := $(wildcard $(foreach f,$(sort $(ksplice-targets)),$(dir $(f)).$(notdir $(f)).cmd))
 247 ifneq ($(ksplice-cmd-files),)
 248 $(ksplice-cmd-files): ;
 249 include $(ksplice-cmd-files)
 250 endif
 251
 252 endif   # KSPLICE_MODE
 253
 254 PHONY += __ksplice
 255 __ksplice: $(ksplice-deps) $(ksplice-dirs)
 256         @:
 257
 258 PHONY += $(ksplice-dirs)
 259 $(ksplice-dirs): $(ksplice-before)
 260         $(Q)$(MAKE) -f $(ksplice-makefile) obj=$(@:_ksplice_%=%)
 261
 262 endif   # skip-makefile
 263
 264 $(eval $(ksplice-cow-eval))
 265
 266 PHONY += FORCE
 267 FORCE:
 268
 269 .PHONY: $(PHONY)