linux-stable/scripts/Makefile.randstruct

# SPDX-License-Identifier: GPL-2.0

randstruct-cflags-y += -DRANDSTRUCT

ifdef CONFIG_GCC_PLUGIN_RANDSTRUCT
randstruct-cflags-y	\
	+= -fplugin=$(objtree)/scripts/gcc-plugins/randomize_layout_plugin.so
randstruct-cflags-$(CONFIG_RANDSTRUCT_PERFORMANCE)		\
	+= -fplugin-arg-randomize_layout_plugin-performance-mode
else
randstruct-cflags-y	\
	+= -frandomize-layout-seed-file=$(objtree)/scripts/basic/randstruct.seed
endif

export RANDSTRUCT_CFLAGS := $(randstruct-cflags-y)

KBUILD_CFLAGS	+= $(RANDSTRUCT_CFLAGS)
randstruct: Split randstruct Makefile and CFLAGS To enable the new Clang randstruct implementation[1], move randstruct into its own Makefile and split the CFLAGS from GCC_PLUGINS_CFLAGS into RANDSTRUCT_CFLAGS. [1] https://reviews.llvm.org/D121556 Cc: linux-hardening@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220503205503.3054173-5-keescook@chromium.org 2022-05-03 20:55:01 +00:00			`# SPDX-License-Identifier: GPL-2.0`

			`randstruct-cflags-y += -DRANDSTRUCT`

			`ifdef CONFIG_GCC_PLUGIN_RANDSTRUCT`
			`randstruct-cflags-y \`
			`+= -fplugin=$(objtree)/scripts/gcc-plugins/randomize_layout_plugin.so`
			`randstruct-cflags-$(CONFIG_RANDSTRUCT_PERFORMANCE) \`
			`+= -fplugin-arg-randomize_layout_plugin-performance-mode`
randstruct: Enable Clang support Clang 15 will support randstruct via the -frandomize-layout-seed-file=... option. Update the Kconfig and Makefile to recognize this feature. Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: linux-kbuild@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220503205503.3054173-7-keescook@chromium.org 2022-05-03 20:55:03 +00:00			`else`
			`randstruct-cflags-y \`
			`+= -frandomize-layout-seed-file=$(objtree)/scripts/basic/randstruct.seed`
randstruct: Split randstruct Makefile and CFLAGS To enable the new Clang randstruct implementation[1], move randstruct into its own Makefile and split the CFLAGS from GCC_PLUGINS_CFLAGS into RANDSTRUCT_CFLAGS. [1] https://reviews.llvm.org/D121556 Cc: linux-hardening@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220503205503.3054173-5-keescook@chromium.org 2022-05-03 20:55:01 +00:00			`endif`

			`export RANDSTRUCT_CFLAGS := $(randstruct-cflags-y)`

			`KBUILD_CFLAGS += $(RANDSTRUCT_CFLAGS)`