1# SPDX-License-Identifier: GPL-2.0 2 3$(obj)/randomize_layout_plugin.so: $(obj)/randomize_layout_seed.h 4quiet_cmd_create_randomize_layout_seed = SEEDHDR $@ 5cmd_create_randomize_layout_seed = \ 6 SEED=$$(cat $(filter-out FORCE,$^) </dev/null); \ 7 echo '/*' > $@; \ 8 echo ' * This file is automatically generated. Keep it private.' >> $@; \ 9 echo ' * Exposing this value will expose the layout of randomized structures.' >> $@; \ 10 echo ' */' >> $@; \ 11 echo "const char *randstruct_seed = \"$$SEED\";" >> $@ 12$(obj)/randomize_layout_seed.h: $(objtree)/scripts/basic/randstruct.seed FORCE 13 $(call if_changed,create_randomize_layout_seed) 14targets += randomize_layout_seed.h 15 16# Build rules for plugins 17# 18# No extra code is needed for single-file plugins. 19# For multi-file plugins, use *-objs syntax to list the objects. 20# 21# If the plugin foo.so is compiled from foo.c and foo2.c, you can do: 22# 23# foo-objs := foo.o foo2.o 24 25always-y += $(GCC_PLUGIN) 26 27GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin) 28 29plugin_cxxflags = -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \ 30 -include $(srctree)/include/linux/compiler-version.h \ 31 -DPLUGIN_VERSION=$(call stringify,$(KERNELVERSION)) \ 32 -I $(GCC_PLUGINS_DIR)/include -I $(obj) \ 33 -fno-rtti -fno-exceptions -fasynchronous-unwind-tables \ 34 -ggdb -Wno-narrowing -Wno-unused-variable \ 35 -Wno-format-diag 36 37plugin_ldflags = -shared 38 39plugin-single := $(foreach m, $(GCC_PLUGIN), $(if $($(m:%.so=%-objs)),,$(m))) 40plugin-multi := $(filter-out $(plugin-single), $(GCC_PLUGIN)) 41plugin-objs := $(sort $(foreach m, $(plugin-multi), $($(m:%.so=%-objs)))) 42 43targets += $(plugin-single) $(plugin-multi) $(plugin-objs) 44clean-files += *.so 45 46plugin-single := $(addprefix $(obj)/, $(plugin-single)) 47plugin-multi := $(addprefix $(obj)/, $(plugin-multi)) 48plugin-objs := $(addprefix $(obj)/, $(plugin-objs)) 49 50quiet_cmd_plugin_cxx_so_c = HOSTCXX $@ 51 cmd_plugin_cxx_so_c = $(HOSTCXX) $(plugin_cxxflags) $(plugin_ldflags) -o $@ $< 52 53$(plugin-single): $(obj)/%.so: $(src)/%.c FORCE 54 $(call if_changed_dep,plugin_cxx_so_c) 55 56quiet_cmd_plugin_ld_so_o = HOSTLD $@ 57 cmd_plugin_ld_so_o = $(HOSTCXX) $(plugin_ldflags) -o $@ \ 58 $(addprefix $(obj)/, $($(target-stem)-objs)) 59 60$(plugin-multi): FORCE 61 $(call if_changed,plugin_ld_so_o) 62$(foreach m, $(notdir $(plugin-multi)), $(eval $(obj)/$m: $(addprefix $(obj)/, $($(m:%.so=%-objs))))) 63 64quiet_cmd_plugin_cxx_o_c = HOSTCXX $@ 65 cmd_plugin_cxx_o_c = $(HOSTCXX) $(plugin_cxxflags) -c -o $@ $< 66 67$(plugin-objs): $(obj)/%.o: $(src)/%.c FORCE 68 $(call if_changed_dep,plugin_cxx_o_c) 69