diff options
Diffstat (limited to '')
| -rw-r--r-- | scripts/gcc-plugins/Makefile | 84 |
1 files changed, 61 insertions, 23 deletions
diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile index f2ee8bd7abc6..b34d11e22636 100644 --- a/scripts/gcc-plugins/Makefile +++ b/scripts/gcc-plugins/Makefile @@ -1,30 +1,68 @@ # SPDX-License-Identifier: GPL-2.0 -PLUGINCC := $(CONFIG_PLUGIN_HOSTCC:"%"=%) -GCC_PLUGINS_DIR := $(shell $(CC) -print-file-name=plugin) - -ifeq ($(PLUGINCC),$(HOSTCC)) - HOSTLIBS := hostlibs - HOST_EXTRACFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu99 -ggdb - export HOST_EXTRACFLAGS -else - HOSTLIBS := hostcxxlibs - HOST_EXTRACXXFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu++98 -fno-rtti - HOST_EXTRACXXFLAGS += -fno-exceptions -fasynchronous-unwind-tables -ggdb - HOST_EXTRACXXFLAGS += -Wno-narrowing -Wno-unused-variable - export HOST_EXTRACXXFLAGS -endif - -$(obj)/randomize_layout_plugin.o: $(objtree)/$(obj)/randomize_layout_seed.h -quiet_cmd_create_randomize_layout_seed = GENSEED $@ + +$(obj)/randomize_layout_plugin.so: $(obj)/randomize_layout_seed.h +quiet_cmd_create_randomize_layout_seed = SEEDHDR $@ cmd_create_randomize_layout_seed = \ - $(CONFIG_SHELL) $(srctree)/$(src)/gen-random-seed.sh $@ $(objtree)/include/generated/randomize_layout_hash.h -$(objtree)/$(obj)/randomize_layout_seed.h: FORCE + SEED=$$(cat $(filter-out FORCE,$^) </dev/null); \ + echo '/*' > $@; \ + echo ' * This file is automatically generated. Keep it private.' >> $@; \ + echo ' * Exposing this value will expose the layout of randomized structures.' >> $@; \ + echo ' */' >> $@; \ + echo "const char *randstruct_seed = \"$$SEED\";" >> $@ +$(obj)/randomize_layout_seed.h: $(objtree)/scripts/basic/randstruct.seed FORCE $(call if_changed,create_randomize_layout_seed) -targets = randomize_layout_seed.h randomize_layout_hash.h +targets += randomize_layout_seed.h + +# Build rules for plugins +# +# No extra code is needed for single-file plugins. +# For multi-file plugins, use *-objs syntax to list the objects. +# +# If the plugin foo.so is compiled from foo.c and foo2.c, you can do: +# +# foo-objs := foo.o foo2.o + +always-y += $(GCC_PLUGIN) -$(HOSTLIBS)-y := $(foreach p,$(GCC_PLUGIN),$(if $(findstring /,$(p)),,$(p))) -always-y := $($(HOSTLIBS)-y) +GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin) -$(foreach p,$($(HOSTLIBS)-y:%.so=%),$(eval $(p)-objs := $(p).o)) +plugin_cxxflags = -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \ + -include $(srctree)/include/linux/compiler-version.h \ + -DPLUGIN_VERSION=$(call stringify,$(KERNELVERSION)) \ + -I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++11 \ + -fno-rtti -fno-exceptions -fasynchronous-unwind-tables \ + -ggdb -Wno-narrowing -Wno-unused-variable \ + -Wno-format-diag +plugin_ldflags = -shared + +plugin-single := $(foreach m, $(GCC_PLUGIN), $(if $($(m:%.so=%-objs)),,$(m))) +plugin-multi := $(filter-out $(plugin-single), $(GCC_PLUGIN)) +plugin-objs := $(sort $(foreach m, $(plugin-multi), $($(m:%.so=%-objs)))) + +targets += $(plugin-single) $(plugin-multi) $(plugin-objs) clean-files += *.so + +plugin-single := $(addprefix $(obj)/, $(plugin-single)) +plugin-multi := $(addprefix $(obj)/, $(plugin-multi)) +plugin-objs := $(addprefix $(obj)/, $(plugin-objs)) + +quiet_cmd_plugin_cxx_so_c = HOSTCXX $@ + cmd_plugin_cxx_so_c = $(HOSTCXX) $(plugin_cxxflags) $(plugin_ldflags) -o $@ $< + +$(plugin-single): $(obj)/%.so: $(src)/%.c FORCE + $(call if_changed_dep,plugin_cxx_so_c) + +quiet_cmd_plugin_ld_so_o = HOSTLD $@ + cmd_plugin_ld_so_o = $(HOSTCXX) $(plugin_ldflags) -o $@ \ + $(addprefix $(obj)/, $($(target-stem)-objs)) + +$(plugin-multi): FORCE + $(call if_changed,plugin_ld_so_o) +$(foreach m, $(notdir $(plugin-multi)), $(eval $(obj)/$m: $(addprefix $(obj)/, $($(m:%.so=%-objs))))) + +quiet_cmd_plugin_cxx_o_c = HOSTCXX $@ + cmd_plugin_cxx_o_c = $(HOSTCXX) $(plugin_cxxflags) -c -o $@ $< + +$(plugin-objs): $(obj)/%.o: $(src)/%.c FORCE + $(call if_changed_dep,plugin_cxx_o_c) |