Get ex2 running

examples/c-form/Makefile

@@ -1,19 +1,19 @@
 BPF_CLANG := clang
 CFLAGS := -O2 -emit-llvm -target bpf -c
 
-SRC := ex3.bpf.c
-OUT := ex3.bpf.ll
-OBJECT := ex3.bpf.o
+SRC := $(wildcard *.bpf.c)
+LL := $(SRC:.bpf.c=.bpf.ll)
+OBJ := $(SRC:.bpf.c=.bpf.o)
 
 .PHONY: all clean
 
-all: $(OUT)
-	
-object: $(SRC)
-	$(BPF_CLANG) -O2 -g -target bpf -c $< -o $(OBJECT)
+all: $(LL) $(OBJ)
 
-$(OUT): $(SRC) object
+%.bpf.o: %.bpf.c
+	$(BPF_CLANG) -O2 -target bpf -c $< -o $@
+
+%.bpf.ll: %.bpf.c
 	$(BPF_CLANG) $(CFLAGS) -S $< -o $@
 
 clean:
-	rm -f $(OUT) $(OBJECT)
+	rm -f $(LL) $(OBJ)

examples/c-form/ex2.bpf.c

@@ -1,7 +1,7 @@
 #include <linux/bpf.h>
 #include <bpf/bpf_helpers.h>
 
-SEC("kprobe/sys_clone")
+SEC("tracepoint/syscalls/sys_enter_execve")
 int hello(struct pt_regs *ctx) {
     bpf_printk("Hello, World!\n");
     return 0;