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e26110cfc6
This patch adds loading, stamp checking and initialization of modules.
The init function of dynamic module is no longer directly called as
__attribute__((constructor)) in static linked version, it is called
only after passed the checking of presense of stamp symbol:
qemu_stamp_$RELEASEHASH
where $RELEASEHASH is generated by hashing version strings and content
of configure script.
With this, modules built from a different tree/version/configure will
not be loaded.
The module loading code requires gmodule-2.0.
Modules are searched under
- CONFIG_MODDIR
- executable folder (to allow running qemu-{img,io} in the build
directory)
- ../ of executable folder (to allow running system emulator in the
build directory)
Modules are linked under their subdir respectively, then copied to top
level of build directory for above convinience, e.g.:
$(BUILD_DIR)/block/curl.so -> $(BUILD_DIR)/block-curl.so
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
242 lines
8.4 KiB
Makefile
242 lines
8.4 KiB
Makefile
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# Don't use implicit rules or variables
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# we have explicit rules for everything
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MAKEFLAGS += -rR
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# Files with this suffixes are final, don't try to generate them
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# using implicit rules
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%.d:
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%.h:
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%.c:
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%.cc:
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%.cpp:
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%.m:
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%.mak:
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# Flags for C++ compilation
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QEMU_CXXFLAGS = -D__STDC_LIMIT_MACROS $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls, $(QEMU_CFLAGS))
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# Flags for dependency generation
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QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d
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# Same as -I$(SRC_PATH) -I., but for the nested source/object directories
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QEMU_INCLUDES += -I$(<D) -I$(@D)
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maybe-add = $(filter-out $1, $2) $1
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extract-libs = $(strip $(sort $(foreach o,$1,$($o-libs)) \
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$(foreach o,$(call expand-objs,$1),$($o-libs))))
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expand-objs = $(strip $(sort $(filter %.o,$1)) \
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$(foreach o,$(filter %.mo,$1),$($o-objs)) \
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$(filter-out %.o %.mo,$1))
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%.o: %.c
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$(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CC $(TARGET_DIR)$@")
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%.o: %.rc
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$(call quiet-command,$(WINDRES) -I. -o $@ $<," RC $(TARGET_DIR)$@")
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# If we have a CXX we might have some C++ objects, in which case we
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# must link with the C++ compiler, not the plain C compiler.
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LINKPROG = $(or $(CXX),$(CC))
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ifeq ($(LIBTOOL),)
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LINK = $(call quiet-command,$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
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$(call expand-objs,$1) $(version-obj-y) \
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$(call extract-libs,$1) $(LIBS)," LINK $(TARGET_DIR)$@")
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else
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LIBTOOL += $(if $(V),,--quiet)
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%.lo: %.c
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$(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," lt CC $@")
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%.lo: %.rc
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$(call quiet-command,$(LIBTOOL) --mode=compile --tag=RC $(WINDRES) -I. -o $@ $<,"lt RC $(TARGET_DIR)$@")
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%.lo: %.dtrace
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$(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@")
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LINK = $(call quiet-command,\
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$(if $(filter %.lo %.la,$1),$(LIBTOOL) --mode=link --tag=CC \
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)$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
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$(call expand-objs,$1) \
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$(if $(filter %.lo %.la,$1),$(version-lobj-y),$(version-obj-y)) \
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$(if $(filter %.lo %.la,$1),$(LIBTOOLFLAGS)) \
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$(call extract-libs,$1) $(LIBS),$(if $(filter %.lo %.la,$1),"lt LINK ", " LINK ")"$(TARGET_DIR)$@")
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endif
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%.asm: %.S
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$(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<," CPP $(TARGET_DIR)$@")
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%.o: %.asm
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$(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<," AS $(TARGET_DIR)$@")
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%.o: %.cc
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$(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," CXX $(TARGET_DIR)$@")
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%.o: %.cpp
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$(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," CXX $(TARGET_DIR)$@")
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%.o: %.m
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$(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," OBJC $(TARGET_DIR)$@")
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%.o: %.dtrace
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$(call quiet-command,dtrace -o $@ -G -s $<, " GEN $(TARGET_DIR)$@")
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DSO_CFLAGS := -fPIC -DBUILD_DSO
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%$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
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%$(DSOSUF): %.mo libqemustub.a
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$(call LINK,$^)
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@# Copy to build root so modules can be loaded when program started without install
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$(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@), " CP $(subst /,-,$@)"))
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.PHONY: modules
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modules:
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%$(EXESUF): %.o
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$(call LINK,$^)
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%.a:
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$(call quiet-command,rm -f $@ && $(AR) rcs $@ $^," AR $(TARGET_DIR)$@")
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quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
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# cc-option
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# Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
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cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
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>/dev/null 2>&1 && echo OK), $2, $3)
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VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc
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set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
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# find-in-path
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# Usage: $(call find-in-path, prog)
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# Looks in the PATH if the argument contains no slash, else only considers one
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# specific directory. Returns an # empty string if the program doesn't exist
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# there.
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find-in-path = $(if $(find-string /, $1), \
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$(wildcard $1), \
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$(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
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# Logical functions (for operating on y/n values like CONFIG_FOO vars)
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# Inputs to these must be either "y" (true) or "n" or "" (both false)
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# Output is always either "y" or "n".
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# Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
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# Logical NOT
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lnot = $(if $(subst n,,$1),n,y)
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# Logical AND
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land = $(if $(findstring yy,$1$2),y,n)
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# Logical OR
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lor = $(if $(findstring y,$1$2),y,n)
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# Logical XOR (note that this is the inverse of leqv)
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lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
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# Logical equivalence (note that leqv "","n" is true)
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leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
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# Logical if: like make's $(if) but with an leqv-like test
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lif = $(if $(subst n,,$1),$2,$3)
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# String testing functions: inputs to these can be any string;
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# the output is always either "y" or "n". Leading and trailing whitespace
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# is ignored when comparing strings.
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# String equality
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eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
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# String inequality
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ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
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# Emptiness/non-emptiness tests:
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isempty = $(if $1,n,y)
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notempty = $(if $1,y,n)
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# Generate files with tracetool
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TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
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# Generate timestamp files for .h include files
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config-%.h: config-%.h-timestamp
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@cmp $< $@ >/dev/null 2>&1 || cp $< $@
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config-%.h-timestamp: config-%.mak
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$(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, " GEN $(TARGET_DIR)config-$*.h")
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.PHONY: clean-timestamp
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clean-timestamp:
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rm -f *.timestamp
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clean: clean-timestamp
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# will delete the target of a rule if commands exit with a nonzero exit status
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.DELETE_ON_ERROR:
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# magic to descend into other directories
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define push-var
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$(eval save-$2-$1 = $(value $1))
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$(eval $1 :=)
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endef
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define pop-var
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$(eval subdir-$2-$1 := $(if $(filter $2,$(save-$2-$1)),$(addprefix $2,$($1))))
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$(eval $1 = $(value save-$2-$1) $$(subdir-$2-$1))
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$(eval save-$2-$1 :=)
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endef
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define fix-obj-vars
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$(foreach v,$($1), \
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$(if $($v-cflags), \
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$(eval $2$v-cflags := $($v-cflags)) \
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$(eval $v-cflags := )) \
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$(if $($v-libs), \
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$(eval $2$v-libs := $($v-libs)) \
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$(eval $v-libs := )) \
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$(if $($v-objs), \
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$(eval $2$v-objs := $(addprefix $2,$($v-objs))) \
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$(eval $v-objs := )))
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endef
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define unnest-dir
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$(foreach var,$(nested-vars),$(call push-var,$(var),$1/))
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$(eval obj-parent-$1 := $(obj))
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$(eval obj := $(if $(obj),$(obj)/$1,$1))
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$(eval include $(SRC_PATH)/$1/Makefile.objs)
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$(foreach v,$(nested-vars),$(call fix-obj-vars,$v,$(if $(obj),$(obj)/)))
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$(eval obj := $(obj-parent-$1))
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$(eval obj-parent-$1 := )
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$(foreach var,$(nested-vars),$(call pop-var,$(var),$1/))
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endef
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define unnest-vars-1
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$(eval nested-dirs := $(filter-out \
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$(old-nested-dirs), \
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$(sort $(foreach var,$(nested-vars), $(filter %/, $($(var)))))))
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$(if $(nested-dirs),
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$(foreach dir,$(nested-dirs),$(call unnest-dir,$(patsubst %/,%,$(dir))))
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$(eval old-nested-dirs := $(old-nested-dirs) $(nested-dirs))
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$(call unnest-vars-1))
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endef
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define process-modules
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$(foreach o,$(filter %.o,$($1)),
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$(eval $(patsubst %.o,%.mo,$o): $o) \
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$(eval $(patsubst %.o,%.mo,$o)-objs := $o))
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$(foreach o,$(filter-out $(modules-m), $(patsubst %.o,%.mo,$($1))), \
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$(eval $o-objs += module-common.o)
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$(eval $o: $($o-objs))
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$(eval modules-objs-m += $($o-objs))
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$(eval modules-m += $o)
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$(eval $o:; $$(call quiet-command,touch $$@," GEN $$(TARGET_DIR)$$@"))
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$(if $(CONFIG_MODULES),$(eval modules: $(patsubst %.mo,%$(DSOSUF),$o)))) \
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$(eval modules-objs-m := $(sort $(modules-objs-m)))
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$(foreach o,$(modules-objs-m), \
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$(if $(CONFIG_MODULES),$(eval $o-cflags := $(call maybe-add, $(DSO_CFLAGS), $($o-cflags)))))
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$(eval $(patsubst %-m,%-$(call lnot,$(CONFIG_MODULES)),$1) += $($1))
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endef
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define unnest-vars
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$(eval obj := $1)
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$(eval nested-vars := $2)
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$(eval old-nested-dirs := )
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$(call unnest-vars-1)
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$(if $1,$(foreach v,$(nested-vars),$(eval \
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$v := $(addprefix $1/,$($v)))))
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$(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var)))))
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$(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var))))))
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$(foreach var,$(nested-vars), $(eval \
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-include $(addsuffix *.d, $(sort $(dir $($(var)))))))
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$(foreach v,$(filter %-m,$(nested-vars)), \
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$(call process-modules,$v))
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endef
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