mirror of git://git.yoctoproject.org/linux-yocto.git synced 2025-12-18 08:36:21 +01:00

Kees Cook 61f60bac8c gcc-plugins: Change all version strings match kernel

It's not meaningful for the GCC plugins to track their versions separately
from the rest of the kernel. Switch all versions to the kernel version.

Fix mismatched indenting while we're at it.

Cc: linux-hardening@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>

2022-05-10 16:54:33 -07:00

2.5 KiB

Raw Blame History

SPDX-License-Identifier: GPL-2.0

$(obj)/randomize_layout_plugin.so: $(obj)/randomize_layout_seed.h quiet_cmd_create_randomize_layout_seed = SEEDHDR $@ cmd_create_randomize_layout_seed =
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

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)

GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin)

plugin_cxxflags = -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC
-include $(srctree)/include/linux/compiler-version.h
-include $(objtree)/include/generated/utsrelease.h
-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)

2.5 KiB Raw Blame History