Re: [PATCH] samples/bpf: Add BTF build flags to Makefile
On 07/26/2018 10:16 AM, Jakub Kicinski wrote: On Thu, 26 Jul 2018 01:30:39 +0900, Taeung Song wrote: To smoothly test BTF supported binary on samples/bpf, let samples/bpf/Makefile probe llc, pahole and llvm-objcopy for BPF support and use them like tools/testing/selftests/bpf/Makefile changed from the commit c0fa1b6c3efc ("bpf: btf: Add BTF tests") Cc: Martin KaFai Lau Signed-off-by: Taeung Song --- samples/bpf/Makefile | 21 - 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 1303af10e54d..e079266360a3 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -191,6 +191,8 @@ HOSTLOADLIBES_xdpsock += -pthread # make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang LLC ?= llc CLANG ?= clang +LLVM_OBJCOPY ?= llvm-objcopy +BTF_PAHOLE ?= pahole # Detect that we're cross compiling and use the cross compiler ifdef CROSS_COMPILE @@ -198,6 +200,20 @@ HOSTCC = $(CROSS_COMPILE)gcc CLANG_ARCH_ARGS = -target $(ARCH) endif +BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) +BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) +BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') + +ifneq ($(BTF_LLC_PROBE),) +ifneq ($(BTF_PAHOLE_PROBE),) +ifneq ($(BTF_OBJCOPY_PROBE),) Nice patch! FWIW you could consider using $(and ...) here: ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),) https://www.gnu.org/software/make/manual/html_node/Conditional-Functions.html#Conditional-Functions Not sure it's worth a respin.. Hi Jakub, Thanks for reviewing this. I also think the conditional functions looks more tidy, will change it! Thanks, Taeung + EXTRA_CFLAGS += -g + LLC_FLAGS += -mattr=dwarfris + DWARF2BTF = y +endif +endif +endif + # Trick to allow make to be run from this directory all: $(MAKE) -C ../../ $(CURDIR)/ BPF_SAMPLES_PATH=$(CURDIR) @@ -256,4 +272,7 @@ $(obj)/%.o: $(src)/%.c -Wno-gnu-variable-sized-type-not-at-end \ -Wno-address-of-packed-member -Wno-tautological-compare \ -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ - -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@ + -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ +ifeq ($(DWARF2BTF),y) + $(BTF_PAHOLE) -J $@ +endif
Re: [PATCH] samples/bpf: Add BTF build flags to Makefile
On Wed, Jul 25, 2018 at 01:38:44PM -0700, Martin KaFai Lau wrote: > On Thu, Jul 26, 2018 at 01:30:39AM +0900, Taeung Song wrote: > > To smoothly test BTF supported binary on samples/bpf, > > let samples/bpf/Makefile probe llc, pahole and > > llvm-objcopy for BPF support and use them > > like tools/testing/selftests/bpf/Makefile > > changed from the commit c0fa1b6c3efc ("bpf: btf: > > Add BTF tests") > > > > Cc: Martin KaFai Lau > > Signed-off-by: Taeung Song > Thanks for the patch. LGTM. > > Acked-by: Martin KaFai Lau and it should go to bpf-next (Please use the proper tag in the Subject, thanks!). > > > --- > > samples/bpf/Makefile | 21 - > > 1 file changed, 20 insertions(+), 1 deletion(-) > > > > diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile > > index 1303af10e54d..e079266360a3 100644 > > --- a/samples/bpf/Makefile > > +++ b/samples/bpf/Makefile > > @@ -191,6 +191,8 @@ HOSTLOADLIBES_xdpsock += -pthread > > # make samples/bpf/ LLC=~/git/llvm/build/bin/llc > > CLANG=~/git/llvm/build/bin/clang > > LLC ?= llc > > CLANG ?= clang > > +LLVM_OBJCOPY ?= llvm-objcopy > > +BTF_PAHOLE ?= pahole > > > > # Detect that we're cross compiling and use the cross compiler > > ifdef CROSS_COMPILE > > @@ -198,6 +200,20 @@ HOSTCC = $(CROSS_COMPILE)gcc > > CLANG_ARCH_ARGS = -target $(ARCH) > > endif > > > > +BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep > > dwarfris) > > +BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) > > +BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i > > 'usage.*llvm') > > + > > +ifneq ($(BTF_LLC_PROBE),) > > +ifneq ($(BTF_PAHOLE_PROBE),) > > +ifneq ($(BTF_OBJCOPY_PROBE),) > > + EXTRA_CFLAGS += -g > > + LLC_FLAGS += -mattr=dwarfris > > + DWARF2BTF = y > > +endif > > +endif > > +endif > > + > > # Trick to allow make to be run from this directory > > all: > > $(MAKE) -C ../../ $(CURDIR)/ BPF_SAMPLES_PATH=$(CURDIR) > > @@ -256,4 +272,7 @@ $(obj)/%.o: $(src)/%.c > > -Wno-gnu-variable-sized-type-not-at-end \ > > -Wno-address-of-packed-member -Wno-tautological-compare \ > > -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ > > - -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@ > > + -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) > > -filetype=obj -o $@ > > +ifeq ($(DWARF2BTF),y) > > + $(BTF_PAHOLE) -J $@ > > +endif > > -- > > 2.17.1 > >
Re: [PATCH] samples/bpf: Add BTF build flags to Makefile
On Thu, Jul 26, 2018 at 01:30:39AM +0900, Taeung Song wrote: > To smoothly test BTF supported binary on samples/bpf, > let samples/bpf/Makefile probe llc, pahole and > llvm-objcopy for BPF support and use them > like tools/testing/selftests/bpf/Makefile > changed from the commit c0fa1b6c3efc ("bpf: btf: > Add BTF tests") > > Cc: Martin KaFai Lau > Signed-off-by: Taeung Song Thanks for the patch. LGTM. Acked-by: Martin KaFai Lau > --- > samples/bpf/Makefile | 21 - > 1 file changed, 20 insertions(+), 1 deletion(-) > > diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile > index 1303af10e54d..e079266360a3 100644 > --- a/samples/bpf/Makefile > +++ b/samples/bpf/Makefile > @@ -191,6 +191,8 @@ HOSTLOADLIBES_xdpsock += -pthread > # make samples/bpf/ LLC=~/git/llvm/build/bin/llc > CLANG=~/git/llvm/build/bin/clang > LLC ?= llc > CLANG ?= clang > +LLVM_OBJCOPY ?= llvm-objcopy > +BTF_PAHOLE ?= pahole > > # Detect that we're cross compiling and use the cross compiler > ifdef CROSS_COMPILE > @@ -198,6 +200,20 @@ HOSTCC = $(CROSS_COMPILE)gcc > CLANG_ARCH_ARGS = -target $(ARCH) > endif > > +BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) > +BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) > +BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i > 'usage.*llvm') > + > +ifneq ($(BTF_LLC_PROBE),) > +ifneq ($(BTF_PAHOLE_PROBE),) > +ifneq ($(BTF_OBJCOPY_PROBE),) > + EXTRA_CFLAGS += -g > + LLC_FLAGS += -mattr=dwarfris > + DWARF2BTF = y > +endif > +endif > +endif > + > # Trick to allow make to be run from this directory > all: > $(MAKE) -C ../../ $(CURDIR)/ BPF_SAMPLES_PATH=$(CURDIR) > @@ -256,4 +272,7 @@ $(obj)/%.o: $(src)/%.c > -Wno-gnu-variable-sized-type-not-at-end \ > -Wno-address-of-packed-member -Wno-tautological-compare \ > -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ > - -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@ > + -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) > -filetype=obj -o $@ > +ifeq ($(DWARF2BTF),y) > + $(BTF_PAHOLE) -J $@ > +endif > -- > 2.17.1 >
[PATCH] samples/bpf: Add BTF build flags to Makefile
To smoothly test BTF supported binary on samples/bpf, let samples/bpf/Makefile probe llc, pahole and llvm-objcopy for BPF support and use them like tools/testing/selftests/bpf/Makefile changed from the commit c0fa1b6c3efc ("bpf: btf: Add BTF tests") Cc: Martin KaFai Lau Signed-off-by: Taeung Song --- samples/bpf/Makefile | 21 - 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 1303af10e54d..e079266360a3 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -191,6 +191,8 @@ HOSTLOADLIBES_xdpsock += -pthread # make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang LLC ?= llc CLANG ?= clang +LLVM_OBJCOPY ?= llvm-objcopy +BTF_PAHOLE ?= pahole # Detect that we're cross compiling and use the cross compiler ifdef CROSS_COMPILE @@ -198,6 +200,20 @@ HOSTCC = $(CROSS_COMPILE)gcc CLANG_ARCH_ARGS = -target $(ARCH) endif +BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris) +BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) +BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') + +ifneq ($(BTF_LLC_PROBE),) +ifneq ($(BTF_PAHOLE_PROBE),) +ifneq ($(BTF_OBJCOPY_PROBE),) + EXTRA_CFLAGS += -g + LLC_FLAGS += -mattr=dwarfris + DWARF2BTF = y +endif +endif +endif + # Trick to allow make to be run from this directory all: $(MAKE) -C ../../ $(CURDIR)/ BPF_SAMPLES_PATH=$(CURDIR) @@ -256,4 +272,7 @@ $(obj)/%.o: $(src)/%.c -Wno-gnu-variable-sized-type-not-at-end \ -Wno-address-of-packed-member -Wno-tautological-compare \ -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ - -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@ + -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@ +ifeq ($(DWARF2BTF),y) + $(BTF_PAHOLE) -J $@ +endif -- 2.17.1