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Makefile.ksplice
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Makefile.ksplice
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ksplice-makefile := $(word $(words $(MAKEFILE_LIST)), $(MAKEFILE_LIST))
ksplice-script = $(dir $(ksplice-makefile))ksplice-obj.pl
KSPLICE_MODE ?= diff
$(if $(filter_out snap diff revert modinst,$(KSPLICE_MODE)), \
$(error Invalid KSPLICE_MODE $(KSPLICE_MODE).))
KSPLICE_ONLY_TARGETS ?= %
PHONY :=
__ksplice:
ksplice-extra = $(filter-out $(KSPLICE_EXCLUDE_MATCH),$(filter $(KSPLICE_EXTRA_MATCH),$(lib-y) $(real-objs-m) $(real-objs-y)))
ksplice-objs = $(foreach o,$(1),$(o:=.KSPLICE) $(addsuffix .KSPLICE_old_code,$(filter $(ksplice-extra),$(o))))
escsq ?= $(subst ','\'',$(1))
echo-cmd ?= $(if $($(quiet)cmd_$(1)),echo ' $(call escsq,$($(quiet)cmd_$(1)))';)
quiet_cmd_ksplice-combine = COMBINE $(@:.KSPLICE=)
cmd_ksplice-combine = $(ksplice-script) combine $@ $(filter $(call ksplice-objs,$(ksplice-link-deps)) $(@:.KSPLICE=),$^ $|)
quiet_cmd_ksplice-snap = SNAP $(@:.KSPLICE=)
cmd_ksplice-snap = $(ksplice-script) snap $@
quiet_cmd_ksplice-diff = DIFF $(@:.KSPLICE=)
cmd_ksplice-diff = $(ksplice-script) diff $@
quiet_cmd_ksplice-ignore = IGNORE $(@:.KSPLICE=)
cmd_ksplice-ignore = touch $@
quiet_cmd_ksplice-cow = COW $@
cmd_ksplice-cow = cp -a $@ [email protected]_pre
quiet_cmd_ksplice-mod = MOD $(@:$(KSPLICE_KMODSRC)/%.mod.KSPLICE=%)
cmd_ksplice-mod = echo $(<:.o.KSPLICE=) > $@; cp -a $< $(<:.KSPLICE=.KSPLICE_new_code) $(<:.KSPLICE=.KSPLICE_old_code) $(KSPLICE_KMODSRC)/
rule_ksplice-mod = if [ -s $< ]; then $(echo-cmd) $(cmd_$(1)); fi
quiet_cmd_ksplice-old-code = OLDCODE $(@:.KSPLICE_old_code=)
cmd_ksplice-old-code = $(ksplice-script) old_code $@
quiet_cmd_ksplice-freeze = FREEZE $(@:_ksplice-revert_%.KSPLICE_pre=%)
cmd_ksplice-freeze = rm -f $(@:_ksplice-revert_%=%)
quiet_cmd_ksplice-revert = REVERT $(@:_ksplice-revert_%.KSPLICE_pre=%)
cmd_ksplice-revert = touch -r ksplice-revert-stamp $(@:_ksplice-revert_%=%); mv $(@:_ksplice-revert_%=%) $(@:_ksplice-revert_%.KSPLICE_pre=%)
quiet_cmd_ksplice-revert-snap = SNAP $(@:_ksplice-revert-snap_%.KSPLICE=%)
cmd_ksplice-revert-snap = $(ksplice-script) snap $(@:_ksplice-revert-snap_%=%)
quiet_cmd_ksplice-clean = CLEAN $(@:_ksplice-clean_%=%)
cmd_ksplice-clean = rm -f $(@:_ksplice-clean_%=%)
ifeq ($(obj),)
ifneq ($(wildcard include/linux/compile.h),)
MAKE += --old-file=include/linux/compile.h
endif
ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
# Makefile.lib must be included before Makefile because they contain
# different filechk definitions in 2.6.12.
include $(if $(KBUILD_SRC),$(KBUILD_SRC)/)scripts/Makefile.lib
endif
include $(if $(KBUILD_SRC),$(KBUILD_SRC)/)Makefile
ifneq ($(skip-makefile),)
PHONY += __ksplice
__ksplice: FORCE
$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
KBUILD_SRC=$(CURDIR) \
KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(ksplice-makefile) \
$(if $(wildcard $(KBUILD_OUTPUT)/include/config/kernel.release),--old-file=include/config/kernel.release)
else # skip-makefile
CC := ksplice-cc.pl $(CC)
CFLAGS_KSPLICE = -ffunction-sections -fdata-sections -ksplice-cflags-api=1
CFLAGS_KERNEL += $(CFLAGS_KSPLICE)
CFLAGS_MODULE += $(CFLAGS_KSPLICE)
ifeq ($(KSPLICE_MODE),revert)
ksplice-revert-dirs = $(vmlinux-alldirs:%=_ksplice_%)
ksplice-dirs += $(ksplice-revert-dirs)
.INTERMEDIATE $(ksplice-revert-dirs): ksplice-revert-stamp
ksplice-revert-stamp: FORCE
$(Q)touch $@
endif # KSPLICE_MODE
ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
ksplice-mods += vmlinux
ifdef KSPLICE_BUILD_MODULES
ksplice-deps += ksplice_modpost
endif
ksplice-deps += $(vmlinux-dirs)
ksplice-vmlinux-objs = $(if $(vmlinux-all),$(vmlinux-all),$(vmlinux-objs))
$(obj)/vmlinux.o.KSPLICE: ksplice-link-deps = $(ksplice-vmlinux-objs)
$(obj)/vmlinux.o.KSPLICE: $(call ksplice-objs,$(ksplice-vmlinux-objs)) FORCE
$(call if_changed,ksplice-combine)
ksplice-targets += $(obj)/vmlinux.o.KSPLICE
$(ksplice-vmlinux-objs:=.KSPLICE): $(vmlinux-dirs) ;
PHONY += ksplice_modpost
ksplice_modpost: $(vmlinux-dirs) vmlinux
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
endif # KSPLICE_MODE
ifeq ($(KSPLICE_MODE),modinst)
ksplice-deps += ksplice_modinst
PHONY += ksplice_modinst
ksplice_modinst:
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
endif # KSPLICE_MODE
endif # skip-makefile
else # obj
ifeq ($(KSPLICE_MODE),revert)
-include .config # workaround for missing obj- = subdir/ declarations
include $(srctree)/scripts/Makefile.clean
ksplice-dirs += $(subdir-ymn:%=_ksplice_%)
endif # KSPLICE_MODE
ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
ifdef KSPLICE_BUILD_MODULES
KBUILD_MODULES = 1
endif
include $(srctree)/scripts/Makefile.build
ksplice-mods += $(obj-m:.o=)
ksplice-deps += $(if $(filter $(KSPLICE_ONLY_TARGETS),vmlinux),$(builtin-target:=.KSPLICE) $(lib-target:=.KSPLICE))
ifdef KSPLICE_BUILD_MODULES
ksplice-deps += __build
endif
ksplice-deps += $(subdir-ym) $(always)
ifdef builtin-target
$(builtin-target:=.KSPLICE): ksplice-link-deps = $(obj-y)
$(builtin-target:=.KSPLICE): $(call ksplice-objs,$(obj-y)) FORCE | $(builtin-target)
$(call if_changed,ksplice-combine)
ksplice-targets += $(builtin-target:=.KSPLICE)
endif
ifdef lib-target
$(lib-target:=.KSPLICE): ksplice-link-deps = $(lib-y)
$(lib-target:=.KSPLICE): $(call ksplice-objs,$(lib-y)) FORCE | $(lib-target)
$(call if_changed,ksplice-combine)
ksplice-targets += $(lib-target:=.KSPLICE)
endif
$(sort $(multi-used-y:=.KSPLICE) $(multi-used-m:=.KSPLICE)): ksplice-link-deps = $($(@:$(obj)/%.o.KSPLICE=%-objs):%=$(obj)/%) $($(@:$(obj)/%.o.KSPLICE=%-y):%=$(obj)/%)
$(sort $(multi-used-y:=.KSPLICE)): $(obj)/%.o.KSPLICE: $(call ksplice-objs,$(multi-objs-y)) FORCE | $(obj)/%.o
$(call if_changed,ksplice-combine)
$(sort $(multi-used-m:=.KSPLICE)): $(obj)/%.o.KSPLICE: $(call ksplice-objs,$(multi-objs-m)) FORCE | $(obj)/%.o
$(call if_changed,ksplice-combine)
ksplice-targets += $(sort $(multi-used-y:=.KSPLICE) $(multi-used-m:=.KSPLICE))
ifeq ($(KSPLICE_MODE),snap)
$(obj)/%.o.KSPLICE: $(obj)/%.o FORCE
$(if $(strip $(wildcard $<.KSPLICE_pre) $(filter $<,$?)), \
$(call cmd,ksplice-snap))
else
$(obj)/%.o.KSPLICE: $(obj)/%.o
$(call cmd,ksplice-diff)
endif
$(obj)/%.lds.KSPLICE:
$(call cmd,ksplice-ignore)
$(sort $(subdir-obj-y:=.KSPLICE)): $(subdir-ym) ;
ifeq ($(MAKECMDGOALS),missing-syscalls)
cmd = @:
endif
endif # KSPLICE_MODE
endif # obj
ifeq ($(skip-makefile),)
ifeq ($(KSPLICE_MODE),revert)
ksplice-revert-obj := $(wildcard $(obj)/*.KSPLICE_pre)
ksplice-revert-files := $(ksplice-revert-obj)
ifneq ($(obj),$(src))
ksplice-revert-files += $(wildcard $(src)/*.KSPLICE_pre)
endif
ksplice-revert-deps := $(ksplice-revert-files:%=_ksplice-revert_%)
ksplice-deps += $(ksplice-revert-deps)
PHONY += $(ksplice-revert-deps)
$(ksplice-revert-deps): FORCE
ifdef KSPLICE_SERIES
$(call cmd,ksplice-freeze)
else
$(call cmd,ksplice-revert)
endif
ksplice-revert-snap-files := $(wildcard $(ksplice-revert-obj:.KSPLICE_pre=.KSPLICE))
ksplice-revert-snap-deps := $(ksplice-revert-snap-files:%=_ksplice-revert-snap_%)
ksplice-deps += $(ksplice-revert-snap-deps)
PHONY += $(ksplice-revert-snap-deps)
$(ksplice-revert-snap-deps): $(ksplice-revert-snap-files:%.KSPLICE=_ksplice-revert_%.KSPLICE_pre) FORCE
$(call cmd,ksplice-revert-snap)
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))
ksplice-clean-deps = $(ksplice-clean-files:%=_ksplice-clean_%)
ksplice-deps += $(ksplice-clean-deps)
PHONY += $(ksplice-clean-deps)
$(ksplice-clean-deps): FORCE
$(call cmd,ksplice-clean)
endif # KSPLICE_MODE
ifneq ($(filter snap diff,$(KSPLICE_MODE)),)
ksplice-modnames = $(filter $(KSPLICE_ONLY_TARGETS),$(notdir $(ksplice-mods)))
ifdef KSPLICE_KMODSRC
ksplice-deps += $(ksplice-modnames:%=$(KSPLICE_KMODSRC)/%.mod.KSPLICE)
$(KSPLICE_KMODSRC)/%.mod.KSPLICE: $(obj)/%.o.KSPLICE
$(Q)$(call rule_ksplice-mod,ksplice-mod)
else
ksplice-deps += $(ksplice-modnames:%=$(obj)/%.o.KSPLICE)
endif
.SECONDARY: $(obj)/%.o.KSPLICE
$(obj)/%.o.KSPLICE_old_code: $(obj)/%.o.KSPLICE
$(call cmd,ksplice-old-code)
ifeq ($(KSPLICE_MODE),diff)
define ksplice-cow-check
$(if $(strip $(1)),$(if $(filter-out %.KSPLICE,$@),$(if $(wildcard $@),$(if $(wildcard [email protected]_pre),,$(call cmd,ksplice-cow)
))))$(1)
endef
define ksplice-add-cow-check
$(v) = $$(call ksplice-cow-check,$(value $(v)))
endef
ksplice-cow-eval += $(foreach v,if_changed if_changed_dep if_changed_rule,$(ksplice-add-cow-check))
endif # KSPLICE_MODE
ksplice-cmd-files := $(wildcard $(foreach f,$(sort $(ksplice-targets)),$(dir $(f)).$(notdir $(f)).cmd))
ifneq ($(ksplice-cmd-files),)
$(ksplice-cmd-files): ;
include $(ksplice-cmd-files)
endif
endif # KSPLICE_MODE
PHONY += __ksplice
__ksplice: $(ksplice-deps) $(ksplice-dirs)
@:
build := -f $(ksplice-makefile) obj
descend =$(Q)$(MAKE) $(build)=$(1) $(2)
PHONY += $(ksplice-dirs)
$(ksplice-dirs):
$(Q)$(MAKE) $(build)=$(@:_ksplice_%=%)
endif # skip-makefile
$(eval $(ksplice-cow-eval))
PHONY += FORCE
FORCE:
.PHONY: $(PHONY)