In preparation for Clang stack depth tracking for stackleak, split the stackleak-specific cflags out of GCC_PLUGINS_CFLAGS into STACKLEAK_CFLAGS.
Signed-off-by: Kees Cook kees@kernel.org --- Cc: Arnd Bergmann arnd@arndb.de Cc: x86@kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: sparclinux@vger.kernel.org Cc: linux-kbuild@vger.kernel.org Cc: linux-hardening@vger.kernel.org --- arch/arm/vdso/Makefile | 2 +- arch/arm64/kernel/vdso/Makefile | 1 + arch/sparc/vdso/Makefile | 3 ++- arch/x86/entry/vdso/Makefile | 3 ++- scripts/Makefile.gcc-plugins | 11 ++++++----- 5 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/arch/arm/vdso/Makefile b/arch/arm/vdso/Makefile index cb044bfd145d..92748e341b7d 100644 --- a/arch/arm/vdso/Makefile +++ b/arch/arm/vdso/Makefile @@ -26,7 +26,7 @@ CPPFLAGS_vdso.lds += -P -C -U$(ARCH) CFLAGS_REMOVE_vdso.o = -pg
# Force -O2 to avoid libgcc dependencies -CFLAGS_REMOVE_vgettimeofday.o = -pg -Os $(RANDSTRUCT_CFLAGS) $(GCC_PLUGINS_CFLAGS) +CFLAGS_REMOVE_vgettimeofday.o = -pg -Os $(RANDSTRUCT_CFLAGS) $(GCC_PLUGINS_CFLAGS) $(STACKLEAK_CFLAGS) ifeq ($(c-gettimeofday-y),) CFLAGS_vgettimeofday.o = -O2 else diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index 5e27e46aa496..fb17749b93cf 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -37,6 +37,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO # the CFLAGS to make possible to build the kernel with CONFIG_WERROR enabled. CC_FLAGS_REMOVE_VDSO := $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS) \ $(RANDSTRUCT_CFLAGS) $(GCC_PLUGINS_CFLAGS) \ + $(STACKLEAK_CFLAGS) \ $(CC_FLAGS_LTO) $(CC_FLAGS_CFI) \ -Wmissing-prototypes -Wmissing-declarations
diff --git a/arch/sparc/vdso/Makefile b/arch/sparc/vdso/Makefile index fdc4a8f5a49c..162a0235f41f 100644 --- a/arch/sparc/vdso/Makefile +++ b/arch/sparc/vdso/Makefile @@ -48,7 +48,7 @@ CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables -m64
SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 $(call cc-option,-fcall-used-g5) $(call cc-option,-fcall-used-g7)
-$(vobjs): KBUILD_CFLAGS := $(filter-out $(RANDSTRUCT_CFLAGS) $(GCC_PLUGINS_CFLAGS) $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS)) $(CFL) +$(vobjs): KBUILD_CFLAGS := $(filter-out $(RANDSTRUCT_CFLAGS) $(GCC_PLUGINS_CFLAGS) $(STACKLEAK_CFLAGS) $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS)) $(CFL)
# # vDSO code runs in userspace and -pg doesn't help with profiling anyway. @@ -80,6 +80,7 @@ KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out $(RANDSTRUCT_CFLAGS),$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32)) +KBUILD_CFLAGS_32 := $(filter-out $(STACKLEAK_CFLAGS),$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic KBUILD_CFLAGS_32 += -fno-stack-protector diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile index 54d3e9774d62..cd5249b6ef84 100644 --- a/arch/x86/entry/vdso/Makefile +++ b/arch/x86/entry/vdso/Makefile @@ -62,7 +62,7 @@ ifneq ($(RETPOLINE_VDSO_CFLAGS),) endif endif
-$(vobjs): KBUILD_CFLAGS := $(filter-out $(PADDING_CFLAGS) $(CC_FLAGS_LTO) $(CC_FLAGS_CFI) $(RANDSTRUCT_CFLAGS) $(GCC_PLUGINS_CFLAGS) $(RETPOLINE_CFLAGS),$(KBUILD_CFLAGS)) $(CFL) +$(vobjs): KBUILD_CFLAGS := $(filter-out $(PADDING_CFLAGS) $(CC_FLAGS_LTO) $(CC_FLAGS_CFI) $(RANDSTRUCT_CFLAGS) $(GCC_PLUGINS_CFLAGS) $(STACKLEAK_CFLAGS) $(RETPOLINE_CFLAGS),$(KBUILD_CFLAGS)) $(CFL) $(vobjs): KBUILD_AFLAGS += -DBUILD_VDSO
# @@ -124,6 +124,7 @@ KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out -mfentry,$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out $(RANDSTRUCT_CFLAGS),$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32)) +KBUILD_CFLAGS_32 := $(filter-out $(STACKLEAK_CFLAGS),$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out $(RETPOLINE_CFLAGS),$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out $(CC_FLAGS_LTO),$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out $(CC_FLAGS_CFI),$(KBUILD_CFLAGS_32)) diff --git a/scripts/Makefile.gcc-plugins b/scripts/Makefile.gcc-plugins index e3ed92e20d16..398b70e2d270 100644 --- a/scripts/Makefile.gcc-plugins +++ b/scripts/Makefile.gcc-plugins @@ -23,18 +23,19 @@ gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK) \ += -DSTRUCTLEAK_PLUGIN
gcc-plugin-$(CONFIG_GCC_PLUGIN_STACKLEAK) += stackleak_plugin.so -gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STACKLEAK) \ +gcc-plugin-stackleak-cflags-$(CONFIG_GCC_PLUGIN_STACKLEAK) \ += -DSTACKLEAK_PLUGIN -gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STACKLEAK) \ +gcc-plugin-stackleak-cflags-$(CONFIG_GCC_PLUGIN_STACKLEAK) \ += -fplugin-arg-stackleak_plugin-track-min-size=$(CONFIG_STACKLEAK_TRACK_MIN_SIZE) -gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STACKLEAK) \ +gcc-plugin-stackleak-cflags-$(CONFIG_GCC_PLUGIN_STACKLEAK) \ += -fplugin-arg-stackleak_plugin-arch=$(SRCARCH) -gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STACKLEAK_VERBOSE) \ +gcc-plugin-stackleak-cflags-$(CONFIG_GCC_PLUGIN_STACKLEAK_VERBOSE) \ += -fplugin-arg-stackleak_plugin-verbose ifdef CONFIG_GCC_PLUGIN_STACKLEAK + STACKLEAK_CFLAGS = $(gcc-plugin-stackleak-cflags-y) DISABLE_STACKLEAK += -fplugin-arg-stackleak_plugin-disable endif -export DISABLE_STACKLEAK +export STACKLEAK_CFLAGS DISABLE_STACKLEAK
gcc-plugin-$(CONFIG_GCC_PLUGIN_ARM_SSP_PER_TASK) += arm_ssp_per_task_plugin.so ifdef CONFIG_GCC_PLUGIN_ARM_SSP_PER_TASK