mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Emese Revfy](/assets/img/avatar_default.png)
The sancov gcc plugin inserts a __sanitizer_cov_trace_pc() call at the start of basic blocks. This plugin is a helper plugin for the kcov feature. It supports all gcc versions with plugin support (from gcc-4.5 on). It is based on the gcc commit "Add fuzzing coverage support" by Dmitry Vyukov (https://gcc.gnu.org/viewcvs/gcc?limit_changes=0&view=revision&revision=231296). Signed-off-by: Emese Revfy <re.emese@gmail.com> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Michal Marek <mmarek@suse.com>
43 lines
1.7 KiB
Makefile
43 lines
1.7 KiB
Makefile
ifdef CONFIG_GCC_PLUGINS
|
|
__PLUGINCC := $(call cc-ifversion, -ge, 0408, $(HOSTCXX), $(HOSTCC))
|
|
PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")
|
|
|
|
SANCOV_PLUGIN := -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so
|
|
|
|
gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY) += cyc_complexity_plugin.so
|
|
|
|
ifdef CONFIG_GCC_PLUGIN_SANCOV
|
|
ifeq ($(CFLAGS_KCOV),)
|
|
# It is needed because of the gcc-plugin.sh and gcc version checks.
|
|
gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV) += sancov_plugin.so
|
|
|
|
ifneq ($(PLUGINCC),)
|
|
CFLAGS_KCOV := $(SANCOV_PLUGIN)
|
|
else
|
|
$(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler)
|
|
endif
|
|
endif
|
|
endif
|
|
|
|
GCC_PLUGINS_CFLAGS := $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y))
|
|
|
|
export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN SANCOV_PLUGIN
|
|
|
|
ifeq ($(PLUGINCC),)
|
|
ifneq ($(GCC_PLUGINS_CFLAGS),)
|
|
ifeq ($(call cc-ifversion, -ge, 0405, y), y)
|
|
PLUGINCC := $(shell $(CONFIG_SHELL) -x $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")
|
|
$(warning warning: your gcc installation does not support plugins, perhaps the necessary headers are missing?)
|
|
else
|
|
$(warning warning: your gcc version does not support plugins, you should upgrade it to gcc 4.5 at least)
|
|
endif
|
|
endif
|
|
else
|
|
# SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication.
|
|
GCC_PLUGINS_CFLAGS := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGINS_CFLAGS))
|
|
endif
|
|
|
|
KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
|
|
GCC_PLUGIN := $(gcc-plugin-y)
|
|
|
|
endif
|