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-deps += $(vmlinux-dirs)
  85
  86 ksplice-vmlinux-objs = $(if $(vmlinux-all),$(vmlinux-all),$(vmlinux-objs))
  87 $(obj)/vmlinux.o.KSPLICE: ksplice-link-deps = $(ksplice-vmlinux-objs)
  88 $(obj)/vmlinux.o.KSPLICE: $(call ksplice-objs,$(ksplice-vmlinux-objs)) FORCE
  89         $(call if_changed,ksplice-combine)
  90 ksplice-targets += $(obj)/vmlinux.o.KSPLICE
  91 $(ksplice-vmlinux-objs:=.KSPLICE): $(vmlinux-dirs) ;
  92
  93 PHONY += ksplice_modpost
  94 ksplice_modpost: $(vmlinux-dirs) vmlinux
  95         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  96
  97 endif   # KSPLICE_MODE
  98
  99 ifeq ($(KSPLICE_MODE),modinst)
 100
 101 ksplice-deps += ksplice_modinst
 102 PHONY += ksplice_modinst
 103 ksplice_modinst:
 104         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 105
 106 endif   # KSPLICE_MODE
 107
 108 endif   # skip-makefile
 109
 110 else    # obj
 111
 112 ifeq ($(KSPLICE_MODE),revert)
 113
 114 -include .config        # workaround for missing obj- = subdir/ declarations
 115 include $(srctree)/scripts/Makefile.clean
 116 ksplice-dirs += $(subdir-ymn:%=_ksplice_%)
 117
 118 endif   # KSPLICE_MODE
 119
 120 ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
 121
 122 ifdef KSPLICE_BUILD_MODULES
 123 KBUILD_MODULES = 1
 124 endif
 125
 126 include $(srctree)/scripts/Makefile.build
 127 ksplice-mods += $(obj-m:.o=)
 128 ksplice-deps += $(if $(filter $(KSPLICE_ONLY_TARGETS),vmlinux),$(builtin-target:=.KSPLICE) $(lib-target:=.KSPLICE))
 129 ifdef KSPLICE_BUILD_MODULES
 130 ksplice-deps += __build
 131 endif
 132 ksplice-deps += $(subdir-ym)
 133
 134 ifdef builtin-target
 135 $(builtin-target:=.KSPLICE): ksplice-link-deps = $(obj-y)
 136 $(builtin-target:=.KSPLICE): $(call ksplice-objs,$(obj-y)) FORCE
 137         $(call if_changed,ksplice-combine)
 138 ksplice-targets += $(builtin-target:=.KSPLICE)
 139 endif
 140
 141 ifdef lib-target
 142 $(lib-target:=.KSPLICE): ksplice-link-deps = $(lib-y)
 143 $(lib-target:=.KSPLICE): $(call ksplice-objs,$(lib-y)) FORCE
 144         $(call if_changed,ksplice-combine)
 145 ksplice-targets += $(lib-target:=.KSPLICE)
 146 endif
 147
 148 $(sort $(multi-used-y:=.KSPLICE) $(multi-used-m:=.KSPLICE)): ksplice-link-deps = $($(@:$(obj)/%.o.KSPLICE=%-objs):%=$(obj)/%) $($(@:$(obj)/%.o.KSPLICE=%-y):%=$(obj)/%)
 149 $(sort $(multi-used-y:=.KSPLICE)): $(obj)/%.o.KSPLICE: $(call ksplice-objs,$(multi-objs-y)) FORCE
 150         $(call if_changed,ksplice-combine)
 151 $(sort $(multi-used-m:=.KSPLICE)): $(obj)/%.o.KSPLICE: $(call ksplice-objs,$(multi-objs-m)) FORCE
 152         $(call if_changed,ksplice-combine)
 153 ksplice-targets += $(sort $(multi-used-y:=.KSPLICE) $(multi-used-m:=.KSPLICE))
 154
 155 ifeq ($(KSPLICE_MODE),snap)
 156 $(obj)/%.o.KSPLICE: $(obj)/%.o FORCE
 157         $(if $(strip $(wildcard $<.KSPLICE_pre) $(filter $<,$?)), \
 158           $(call cmd,ksplice-snap))
 159 else
 160 $(obj)/%.o.KSPLICE: $(obj)/%.o
 161         $(call cmd,ksplice-diff)
 162 endif
 163
 164 $(obj)/%.lds.KSPLICE:
 165         $(call cmd,ksplice-ignore)
 166
 167 $(sort $(subdir-obj-y:=.KSPLICE)): $(subdir-ym) ;
 168
 169 ifeq ($(MAKECMDGOALS),missing-syscalls)
 170 cmd = @:
 171 endif
 172
 173 endif   # KSPLICE_MODE
 174
 175 endif   # obj
 176
 177 ifeq ($(skip-makefile),)
 178
 179 ifeq ($(KSPLICE_MODE),revert)
 180
 181 ksplice-revert-obj := $(wildcard $(obj)/*.KSPLICE_pre)
 182 ksplice-revert-files := $(ksplice-revert-obj)
 183 ifneq ($(obj),$(src))
 184 ksplice-revert-files += $(wildcard $(src)/*.KSPLICE_pre)
 185 endif
 186 ksplice-revert-deps := $(ksplice-revert-files:%=_ksplice-revert_%)
 187 ksplice-deps += $(ksplice-revert-deps)
 188 PHONY += $(ksplice-revert-deps)
 189 $(ksplice-revert-deps): FORCE
 190 ifdef KSPLICE_SERIES
 191         $(call cmd,ksplice-freeze)
 192 else
 193         $(call cmd,ksplice-revert)
 194 endif
 195
 196 ksplice-revert-snap-files := $(wildcard $(ksplice-revert-obj:.KSPLICE_pre=.KSPLICE))
 197 ksplice-revert-snap-deps := $(ksplice-revert-snap-files:%=_ksplice-revert-snap_%)
 198 ksplice-deps += $(ksplice-revert-snap-deps)
 199 PHONY += $(ksplice-revert-snap-deps)
 200 $(ksplice-revert-snap-deps): $(ksplice-revert-snap-files:%.KSPLICE=_ksplice-revert_%.KSPLICE_pre) FORCE
 201         $(call cmd,ksplice-revert-snap)
 202
 203 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))
 204 ksplice-clean-deps = $(ksplice-clean-files:%=_ksplice-clean_%)
 205 ksplice-deps += $(ksplice-clean-deps)
 206 PHONY += $(ksplice-clean-deps)
 207 $(ksplice-clean-deps): FORCE
 208         $(call cmd,ksplice-clean)
 209
 210 endif   # KSPLICE_MODE
 211
 212 ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
 213
 214 ksplice-modnames = $(filter $(KSPLICE_ONLY_TARGETS),$(notdir $(ksplice-mods)))
 215 ifdef KSPLICE_KMODSRC
 216 ksplice-deps += $(ksplice-modnames:%=$(KSPLICE_KMODSRC)/%.mod.KSPLICE)
 217 $(KSPLICE_KMODSRC)/%.mod.KSPLICE: $(obj)/%.o.KSPLICE
 218         $(Q)$(call rule_ksplice-mod,ksplice-mod)
 219 else
 220 ksplice-deps += $(ksplice-modnames:%=$(obj)/%.o.KSPLICE)
 221 endif
 222 .PRECIOUS: $(obj)/%.o.KSPLICE
 223
 224 $(obj)/%.o.KSPLICE_helper: $(obj)/%.o.KSPLICE
 225         $(call cmd,ksplice-helper)
 226
 227 ifeq ($(KSPLICE_MODE),diff)
 228
 229 define ksplice-cow-check
 230         $(if $(filter-out %.KSPLICE,$@), \
 231           $(if $(strip $(filter-out $(PHONY),$?) $(filter-out $(cmd_$(1)),$(cmd_$@)) $(filter-out $(cmd_$@),$(cmd_$(1)))), \
 232             $(if $(wildcard $@), \
 233               $(if $(wildcard $@.KSPLICE_pre),, \
 234                 $(call cmd,ksplice-cow)))))
 235
 236 endef
 237
 238 define ksplice-add-cow-check
 239 $(v) = $$(ksplice-cow-check)$(value $(v))
 240
 241 endef
 242
 243 ksplice-cow-eval += $(foreach v,if_changed if_changed_dep if_changed_rule,$(ksplice-add-cow-check))
 244
 245 endif   # KSPLICE_MODE
 246
 247 ksplice-cmd-files := $(wildcard $(foreach f,$(sort $(ksplice-targets)),$(dir $(f)).$(notdir $(f)).cmd))
 248 ifneq ($(ksplice-cmd-files),)
 249 $(ksplice-cmd-files): ;
 250 include $(ksplice-cmd-files)
 251 endif
 252
 253 endif   # KSPLICE_MODE
 254
 255 PHONY += __ksplice
 256 __ksplice: $(ksplice-deps) $(ksplice-dirs)
 257         @:
 258
 259 build := -f $(ksplice-makefile) obj
 260 descend =$(Q)$(MAKE) $(build)=$(1) $(2)
 261
 262 PHONY += $(ksplice-dirs)
 263 $(ksplice-dirs):
 264         $(Q)$(MAKE) $(build)=$(@:_ksplice_%=%)
 265
 266 endif   # skip-makefile
 267
 268 $(eval $(ksplice-cow-eval))
 269
 270 PHONY += FORCE
 271 FORCE:
 272
 273 .PHONY: $(PHONY)