On Mon, 2 May 2016 14:07:35 +0900 Masahiro Yamada <yamada.masah...@socionext.com> wrote:
Hi, > > diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile > > index 253b72e..f912316 100644 > > --- a/arch/x86/entry/vdso/Makefile > > +++ b/arch/x86/entry/vdso/Makefile > > @@ -75,7 +75,7 @@ CFL := $(PROFILING) -mcmodel=small -fPIC -O2 > > -fasynchronous-unwind-tables -m64 \ > > -fno-omit-frame-pointer -foptimize-sibling-calls \ > > -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO > > > > -$(vobjs): KBUILD_CFLAGS += $(CFL) > > +$(vobjs): KBUILD_CFLAGS := $(filter-out > > $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS)) $(CFL) > > > > # > > # vDSO code runs in userspace and -pg doesn't help with profiling anyway. > > @@ -145,6 +145,7 @@ KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS)) > > KBUILD_CFLAGS_32 := $(filter-out -mcmodel=kernel,$(KBUILD_CFLAGS_32)) > > KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32)) > > KBUILD_CFLAGS_32 := $(filter-out -mfentry,$(KBUILD_CFLAGS_32)) > > +KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32)) > > KBUILD_CFLAGS_32 += -m32 -msoft-float -mregparm=0 -fpic > > KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector) > > KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls) > > > Looks like gcc-plugins should be omitted only for this directory. > Please tell me why. > I am not familiar with x86 architecture, so this is not clear to me. The vdso is userland code so in general kernel instrumentation/analysis doesn't apply to it. -- Emese
