1 # SPDX-License-Identifier: GPL-2.0
3 $(obj)/randomize_layout_plugin.so: $(obj)/randomize_layout_seed.h
4 quiet_cmd_create_randomize_layout_seed = SEEDHDR $@
5 cmd_create_randomize_layout_seed = \
6 SEED=$$(cat $(filter-out FORCE,$^) </dev/null); \
8 echo ' * This file is automatically generated. Keep it private.' >> $@; \
9 echo ' * Exposing this value will expose the layout of randomized structures.' >> $@; \
11 echo "const char *randstruct_seed = \"$$SEED\";" >> $@
12 $(obj)/randomize_layout_seed.h: $(objtree)/scripts/basic/randstruct.seed FORCE
13 $(call if_changed,create_randomize_layout_seed)
14 targets += randomize_layout_seed.h
16 # Build rules for plugins
18 # No extra code is needed for single-file plugins.
19 # For multi-file plugins, use *-objs syntax to list the objects.
21 # If the plugin foo.so is compiled from foo.c and foo2.c, you can do:
23 # foo-objs := foo.o foo2.o
25 always-y += $(GCC_PLUGIN)
27 GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin)
29 plugin_cxxflags = -Wp,-MMD,$(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 \
37 plugin_ldflags = -shared
39 plugin-single := $(foreach m, $(GCC_PLUGIN), $(if $($(m:%.so=%-objs)),,$(m)))
40 plugin-multi := $(filter-out $(plugin-single), $(GCC_PLUGIN))
41 plugin-objs := $(sort $(foreach m, $(plugin-multi), $($(m:%.so=%-objs))))
43 targets += $(plugin-single) $(plugin-multi) $(plugin-objs)
46 plugin-single := $(addprefix $(obj)/, $(plugin-single))
47 plugin-multi := $(addprefix $(obj)/, $(plugin-multi))
48 plugin-objs := $(addprefix $(obj)/, $(plugin-objs))
50 quiet_cmd_plugin_cxx_so_c = HOSTCXX $@
51 cmd_plugin_cxx_so_c = $(HOSTCXX) $(plugin_cxxflags) $(plugin_ldflags) -o $@ $<
53 $(plugin-single): $(obj)/%.so: $(src)/%.c FORCE
54 $(call if_changed_dep,plugin_cxx_so_c)
56 quiet_cmd_plugin_ld_so_o = HOSTLD $@
57 cmd_plugin_ld_so_o = $(HOSTCXX) $(plugin_ldflags) -o $@ \
58 $(addprefix $(obj)/, $($(target-stem)-objs))
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)))))
64 quiet_cmd_plugin_cxx_o_c = HOSTCXX $@
65 cmd_plugin_cxx_o_c = $(HOSTCXX) $(plugin_cxxflags) -c -o $@ $<
67 $(plugin-objs): $(obj)/%.o: $(src)/%.c FORCE
68 $(call if_changed_dep,plugin_cxx_o_c)