543c37cb16
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>
44 lines
1.7 KiB
Makefile
44 lines
1.7 KiB
Makefile
ifdef CONFIG_GCC_PLUGINS
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__PLUGINCC := $(call cc-ifversion, -ge, 0408, $(HOSTCXX), $(HOSTCC))
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PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")
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SANCOV_PLUGIN := -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so
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gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY) += cyc_complexity_plugin.so
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ifdef CONFIG_GCC_PLUGIN_SANCOV
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ifeq ($(CFLAGS_KCOV),)
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# It is needed because of the gcc-plugin.sh and gcc version checks.
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gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV) += sancov_plugin.so
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ifneq ($(PLUGINCC),)
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CFLAGS_KCOV := $(SANCOV_PLUGIN)
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else
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$(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler)
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endif
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endif
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endif
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GCC_PLUGINS_CFLAGS := $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y))
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export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN SANCOV_PLUGIN
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ifeq ($(PLUGINCC),)
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ifneq ($(GCC_PLUGINS_CFLAGS),)
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ifeq ($(call cc-ifversion, -ge, 0405, y), y)
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PLUGINCC := $(shell $(CONFIG_SHELL) -x $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")
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$(warning warning: your gcc installation does not support plugins, perhaps the necessary headers are missing?)
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else
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$(warning warning: your gcc version does not support plugins, you should upgrade it to gcc 4.5 at least)
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endif
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endif
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else
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# SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication.
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GCC_PLUGINS_CFLAGS := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGINS_CFLAGS))
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endif
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KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
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GCC_PLUGIN := $(gcc-plugin-y)
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endif
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