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-out $(KSPLICE_EXCLUDE_MATCH),$(filter $(KSPLICE_EXTRA_MATCH),$(lib-y) $(real-objs-m) $(real-objs-y)))
  15 ksplice-objs = $(foreach o,$(1),$(o:=.KSPLICE) $(addsuffix .KSPLICE_old_code,$(filter $(ksplice-extra),$(o))))
  16 ifdef KSPLICE_BUILD_MODULES
  17 ksplice-objs += $(2)
  18 endif
  19
  20 escsq ?= $(subst ','\'',$(1))
  21 echo-cmd ?= $(if $($(quiet)cmd_$(1)),echo '  $(call escsq,$($(quiet)cmd_$(1)))';)
  22
  23 quiet_cmd_ksplice-combine = COMBINE $(@:.KSPLICE=)
  24 cmd_ksplice-combine = $(ksplice-script) combine $@ $(filter $(call ksplice-objs,$(ksplice-link-deps),$(@:.KSPLICE=)),$^)
  25 quiet_cmd_ksplice-snap = SNAP    $(@:.KSPLICE=)
  26 cmd_ksplice-snap = $(ksplice-script) snap $@
  27 quiet_cmd_ksplice-diff = DIFF    $(@:.KSPLICE=)
  28 cmd_ksplice-diff = $(ksplice-script) diff $@
  29 quiet_cmd_ksplice-ignore = IGNORE  $(@:.KSPLICE=)
  30 cmd_ksplice-ignore = touch $@
  31 quiet_cmd_ksplice-cow = COW     $@
  32 cmd_ksplice-cow = cp -a $@ $@.KSPLICE_pre
  33 quiet_cmd_ksplice-mod = MOD     $(@:$(KSPLICE_KMODSRC)/%.mod.KSPLICE=%)
  34 cmd_ksplice-mod = echo $(<:.o.KSPLICE=) > $@; cp -a $< $(<:.KSPLICE=.KSPLICE_new_code) $(<:.KSPLICE=.KSPLICE_old_code) $(KSPLICE_KMODSRC)/
  35 rule_ksplice-mod = if [ -s $< ]; then $(echo-cmd) $(cmd_$(1)); fi
  36 quiet_cmd_ksplice-old-code = OLDCODE $(@:.KSPLICE_old_code=)
  37 cmd_ksplice-old-code = $(ksplice-script) old_code $@
  38 quiet_cmd_ksplice-freeze = FREEZE  $(@:_ksplice-revert_%.KSPLICE_pre=%)
  39 cmd_ksplice-freeze = rm -f $(@:_ksplice-revert_%=%)
  40 quiet_cmd_ksplice-revert = REVERT  $(@:_ksplice-revert_%.KSPLICE_pre=%)
  41 cmd_ksplice-revert = touch -r ksplice-revert-stamp $(@:_ksplice-revert_%=%); mv $(@:_ksplice-revert_%=%) $(@:_ksplice-revert_%.KSPLICE_pre=%)
  42 quiet_cmd_ksplice-revert-snap = SNAP    $(@:_ksplice-revert-snap_%.KSPLICE=%)
  43 cmd_ksplice-revert-snap = $(ksplice-script) snap $(@:_ksplice-revert-snap_%=%)
  44 quiet_cmd_ksplice-clean = CLEAN   $(@:_ksplice-clean_%=%)
  45 cmd_ksplice-clean = rm -f $(@:_ksplice-clean_%=%)
  46
  47 ifeq ($(obj),)
  48
  49 ifneq ($(wildcard include/linux/compile.h),)
  50 MAKE += --old-file=include/linux/compile.h
  51 endif
  52 ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
  53 # Makefile.lib must be included before Makefile because they contain
  54 # different filechk definitions in 2.6.12.
  55 include $(if $(KBUILD_SRC),$(KBUILD_SRC)/)scripts/Makefile.lib
  56 endif
  57 include $(if $(KBUILD_SRC),$(KBUILD_SRC)/)Makefile
  58
  59 ifneq ($(skip-makefile),)
  60
  61 PHONY += __ksplice
  62 __ksplice: FORCE
  63         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  64         KBUILD_SRC=$(CURDIR) \
  65         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(ksplice-makefile) \
  66         $(if $(wildcard $(KBUILD_OUTPUT)/include/config/kernel.release),--old-file=include/config/kernel.release)
  67
  68 else    # skip-makefile
  69
  70 CC := ksplice-cc.pl $(CC)
  71 CFLAGS_KSPLICE = -ffunction-sections -fdata-sections -ksplice-cflags-api=1
  72 CFLAGS_KERNEL += $(CFLAGS_KSPLICE)
  73 CFLAGS_MODULE += $(CFLAGS_KSPLICE)
  74
  75 ifeq ($(KSPLICE_MODE),revert)
  76
  77 ksplice-revert-dirs = $(vmlinux-alldirs:%=_ksplice_%)
  78 ksplice-dirs += $(ksplice-revert-dirs)
  79
  80 .INTERMEDIATE $(ksplice-revert-dirs): ksplice-revert-stamp
  81 ksplice-revert-stamp: FORCE
  82         $(Q)touch $@
  83
  84 endif   # KSPLICE_MODE
  85
  86 ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
  87
  88 ksplice-mods += vmlinux
  89 ifdef KSPLICE_BUILD_MODULES
  90 ksplice-deps += ksplice_modpost
  91 endif
  92 ksplice-deps += $(vmlinux-dirs)
  93
  94 ksplice-vmlinux-objs = $(if $(vmlinux-all),$(vmlinux-all),$(vmlinux-objs))
  95 $(obj)/vmlinux.o.KSPLICE: ksplice-link-deps = $(ksplice-vmlinux-objs)
  96 $(obj)/vmlinux.o.KSPLICE: $(call ksplice-objs,$(ksplice-vmlinux-objs),) FORCE
  97         $(call if_changed,ksplice-combine)
  98 ksplice-targets += $(obj)/vmlinux.o.KSPLICE
  99 $(ksplice-vmlinux-objs:=.KSPLICE): $(vmlinux-dirs) ;
 100
 101 PHONY += ksplice_modpost
 102 ksplice_modpost: $(vmlinux-dirs) vmlinux
 103         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 104
 105 endif   # KSPLICE_MODE
 106
 107 ifeq ($(KSPLICE_MODE),modinst)
 108
 109 ksplice-deps += ksplice_modinst
 110 PHONY += ksplice_modinst
 111 ksplice_modinst:
 112         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 113
 114 endif   # KSPLICE_MODE
 115
 116 endif   # skip-makefile
 117
 118 else    # obj
 119
 120 ifeq ($(KSPLICE_MODE),revert)
 121
 122 -include .config        # workaround for missing obj- = subdir/ declarations
 123 include $(srctree)/scripts/Makefile.clean
 124 ksplice-dirs += $(subdir-ymn:%=_ksplice_%)
 125
 126 endif   # KSPLICE_MODE
 127
 128 ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
 129
 130 ifdef KSPLICE_BUILD_MODULES
 131 KBUILD_MODULES = 1
 132 endif
 133
 134 include $(srctree)/scripts/Makefile.build
 135 ksplice-mods += $(obj-m:.o=)
 136 ksplice-deps += $(if $(filter $(KSPLICE_ONLY_TARGETS),vmlinux),$(builtin-target:=.KSPLICE) $(lib-target:=.KSPLICE))
 137 ifdef KSPLICE_BUILD_MODULES
 138 ksplice-deps += __build
 139 endif
 140 ksplice-deps += $(subdir-ym) $(always)
 141
 142 ifdef builtin-target
 143 $(builtin-target:=.KSPLICE): ksplice-link-deps = $(obj-y)
 144 $(builtin-target:=.KSPLICE): $(call ksplice-objs,$(obj-y),$(builtin-target)) FORCE
 145         $(call if_changed,ksplice-combine)
 146 ksplice-targets += $(builtin-target:=.KSPLICE)
 147 endif
 148
 149 ifdef lib-target
 150 $(lib-target:=.KSPLICE): ksplice-link-deps = $(lib-y)
 151 $(lib-target:=.KSPLICE): $(call ksplice-objs,$(lib-y),$(lib-target)) FORCE
 152         $(call if_changed,ksplice-combine)
 153 ksplice-targets += $(lib-target:=.KSPLICE)
 154 endif
 155
 156 $(sort $(multi-used-y:=.KSPLICE) $(multi-used-m:=.KSPLICE)): ksplice-link-deps = $($(@:$(obj)/%.o.KSPLICE=%-objs):%=$(obj)/%) $($(@:$(obj)/%.o.KSPLICE=%-y):%=$(obj)/%)
 157 $(sort $(multi-used-y:=.KSPLICE)): $(obj)/%.o.KSPLICE: $(call ksplice-objs,$(multi-objs-y),$(obj)/%.o) FORCE
 158         $(call if_changed,ksplice-combine)
 159 $(sort $(multi-used-m:=.KSPLICE)): $(obj)/%.o.KSPLICE: $(call ksplice-objs,$(multi-objs-m),$(obj)/%.o) FORCE
 160         $(call if_changed,ksplice-combine)
 161 ksplice-targets += $(sort $(multi-used-y:=.KSPLICE) $(multi-used-m:=.KSPLICE))
 162
 163 ifeq ($(KSPLICE_MODE),snap)
 164 $(obj)/%.o.KSPLICE: $(obj)/%.o FORCE
 165         $(if $(strip $(wildcard $<.KSPLICE_pre) $(filter $<,$?)), \
 166           $(call cmd,ksplice-snap))
 167 else
 168 $(obj)/%.o.KSPLICE: $(obj)/%.o
 169         $(call cmd,ksplice-diff)
 170 endif
 171
 172 $(obj)/%.lds.KSPLICE:
 173         $(call cmd,ksplice-ignore)
 174
 175 $(sort $(subdir-obj-y:=.KSPLICE)): $(subdir-ym) ;
 176
 177 ifeq ($(MAKECMDGOALS),missing-syscalls)
 178 cmd = @:
 179 endif
 180
 181 endif   # KSPLICE_MODE
 182
 183 endif   # obj
 184
 185 ifeq ($(skip-makefile),)
 186
 187 ifeq ($(KSPLICE_MODE),revert)
 188
 189 ksplice-revert-obj := $(wildcard $(obj)/*.KSPLICE_pre)
 190 ksplice-revert-files := $(ksplice-revert-obj)
 191 ifneq ($(obj),$(src))
 192 ksplice-revert-files += $(wildcard $(src)/*.KSPLICE_pre)
 193 endif
 194 ksplice-revert-deps := $(ksplice-revert-files:%=_ksplice-revert_%)
 195 ksplice-deps += $(ksplice-revert-deps)
 196 PHONY += $(ksplice-revert-deps)
 197 $(ksplice-revert-deps): FORCE
 198 ifdef KSPLICE_SERIES
 199         $(call cmd,ksplice-freeze)
 200 else
 201         $(call cmd,ksplice-revert)
 202 endif
 203
 204 ksplice-revert-snap-files := $(wildcard $(ksplice-revert-obj:.KSPLICE_pre=.KSPLICE))
 205 ksplice-revert-snap-deps := $(ksplice-revert-snap-files:%=_ksplice-revert-snap_%)
 206 ksplice-deps += $(ksplice-revert-snap-deps)
 207 PHONY += $(ksplice-revert-snap-deps)
 208 $(ksplice-revert-snap-deps): $(ksplice-revert-snap-files:%.KSPLICE=_ksplice-revert_%.KSPLICE_pre) FORCE
 209         $(call cmd,ksplice-revert-snap)
 210
 211 ksplice-clean-files := $(filter-out $(ksplice-revert-snap-files:.KSPLICE_pre=.KSPLICE_new_code) $(ksplice-revert-snap-files:.KSPLICE_pre=.KSPLICE_old_code),$(wildcard $(obj)/*.KSPLICE_new_code $(obj)/*.KSPLICE_old_code))
 212 ksplice-clean-deps = $(ksplice-clean-files:%=_ksplice-clean_%)
 213 ksplice-deps += $(ksplice-clean-deps)
 214 PHONY += $(ksplice-clean-deps)
 215 $(ksplice-clean-deps): FORCE
 216         $(call cmd,ksplice-clean)
 217
 218 endif   # KSPLICE_MODE
 219
 220 ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
 221
 222 ksplice-modnames = $(filter $(KSPLICE_ONLY_TARGETS),$(notdir $(ksplice-mods)))
 223 ifdef KSPLICE_KMODSRC
 224 ksplice-deps += $(ksplice-modnames:%=$(KSPLICE_KMODSRC)/%.mod.KSPLICE)
 225 $(KSPLICE_KMODSRC)/%.mod.KSPLICE: $(obj)/%.o.KSPLICE
 226         $(Q)$(call rule_ksplice-mod,ksplice-mod)
 227 else
 228 ksplice-deps += $(ksplice-modnames:%=$(obj)/%.o.KSPLICE)
 229 endif
 230 .SECONDARY: $(obj)/%.o.KSPLICE
 231
 232 $(obj)/%.o.KSPLICE_old_code: $(obj)/%.o.KSPLICE
 233         $(call cmd,ksplice-old-code)
 234
 235 ifeq ($(KSPLICE_MODE),diff)
 236
 237 define ksplice-cow-check
 238         $(if $(filter-out %.KSPLICE,$@), \
 239           $(if $(strip $(filter-out $(PHONY),$?) $(filter-out $(cmd_$(1)),$(cmd_$@)) $(filter-out $(cmd_$@),$(cmd_$(1)))), \
 240             $(if $(wildcard $@), \
 241               $(if $(wildcard $@.KSPLICE_pre),, \
 242                 $(call cmd,ksplice-cow)))))
 243
 244 endef
 245
 246 define ksplice-add-cow-check
 247 $(v) = $$(ksplice-cow-check)$(value $(v))
 248
 249 endef
 250
 251 ksplice-cow-eval += $(foreach v,if_changed if_changed_dep if_changed_rule,$(ksplice-add-cow-check))
 252
 253 endif   # KSPLICE_MODE
 254
 255 ksplice-cmd-files := $(wildcard $(foreach f,$(sort $(ksplice-targets)),$(dir $(f)).$(notdir $(f)).cmd))
 256 ifneq ($(ksplice-cmd-files),)
 257 $(ksplice-cmd-files): ;
 258 include $(ksplice-cmd-files)
 259 endif
 260
 261 endif   # KSPLICE_MODE
 262
 263 PHONY += __ksplice
 264 __ksplice: $(ksplice-deps) $(ksplice-dirs)
 265         @:
 266
 267 build := -f $(ksplice-makefile) obj
 268 descend =$(Q)$(MAKE) $(build)=$(1) $(2)
 269
 270 PHONY += $(ksplice-dirs)
 271 $(ksplice-dirs):
 272         $(Q)$(MAKE) $(build)=$(@:_ksplice_%=%)
 273
 274 endif   # skip-makefile
 275
 276 $(eval $(ksplice-cow-eval))
 277
 278 PHONY += FORCE
 279 FORCE:
 280
 281 .PHONY: $(PHONY)