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common.mk: support generating skeletons for BPF object files

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Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
This commit is contained in:
Toke Høiland-Jørgensen
2021-09-29 01:43:35 +02:00
parent 9d975cdf29
commit c7e3acf5d0
3 changed files with 9 additions and 2 deletions
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8
lib/common.mk
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@@ -12,6 +12,7 @@
#
BPF_C = ${BPF_TARGETS:=.c}
BPF_OBJ = ${BPF_C:.c=.o}
BPF_SKEL = ${BPF_SKEL_OBJ:.o=.skel.h}
USER_C := ${USER_TARGETS:=.c}
USER_OBJ := ${USER_C:.c=.o}
BPF_OBJ_INSTALL ?= $(BPF_OBJ)
@@ -51,7 +52,7 @@ BPF_CFLAGS += -I$(INCLUDE_DIR) -I$(HEADER_DIR) $(EXTRA_CFLAGS)
BPF_HEADERS := $(wildcard $(HEADER_DIR)/*/*.h) $(wildcard $(INCLUDE_DIR)/*/*.h)
all: $(USER_TARGETS) $(BPF_OBJ) $(EXTRA_TARGETS)
all: $(USER_TARGETS) $(BPF_OBJ) $(EXTRA_TARGETS) $(BPF_SKEL)
.PHONY: clean
clean::
@@ -70,7 +71,7 @@ LIB_H := ${LIB_OBJS:.o=.h}
$(LIB_OBJS): %.o: %.c %.h $(LIB_H)
$(Q)$(MAKE) -C $(dir $@) $(notdir $@)
$(USER_TARGETS): %: %.c $(OBJECT_LIBBPF) $(OBJECT_LIBXDP) $(LIBMK) $(LIB_OBJS) $(KERN_USER_H) $(EXTRA_DEPS) $(EXTRA_USER_DEPS)
$(USER_TARGETS): %: %.c $(OBJECT_LIBBPF) $(OBJECT_LIBXDP) $(LIBMK) $(LIB_OBJS) $(KERN_USER_H) $(EXTRA_DEPS) $(EXTRA_USER_DEPS) $(BPF_SKEL)
$(QUIET_CC)$(CC) -Wall $(CFLAGS) $(LDFLAGS) -o $@ $(LIB_OBJS) \
$< $(LDLIBS)
@@ -86,6 +87,9 @@ $(BPF_OBJ): %.o: %.c $(KERN_USER_H) $(EXTRA_DEPS) $(BPF_HEADERS) $(LIBMK)
-O2 -emit-llvm -c -g -o ${@:.o=.ll} $<
$(QUIET_LLC)$(LLC) -march=bpf -filetype=obj -o $@ ${@:.o=.ll}
$(BPF_SKEL): %.skel.h: %.o
$(QUIET_GEN)$(BPFTOOL) gen skeleton ${@:.skel.h=.o} > $@
.PHONY: test
ifeq ($(TEST_FILE),)