cann recv a string from the kernel to userland

2 files changed, 3 insertions, 24 deletions

diff --git a/main.bpf.c b/main.bpf.c
index 3c8a928..df20264 100644
--- a/main.bpf.c
+++ b/main.bpf.c
@@ -25,19 +25,8 @@ struct {
 SEC("kprobe/sys_mmap")
 int kprobe__sys_mmap(struct pt_regs *ctx)
 {
-    u32 firstKey = 1;
-    struct value *v1 = bpf_map_lookup_elem(&tester, &firstKey);
-    if (!v1) {
-        return 1;
-    }
-    bpf_perf_event_output(ctx, &events, BPF_F_CURRENT_CPU, v1, sizeof(struct value));
-
-    s64 secondKey = 42069420;
-    struct value *v2 = bpf_map_lookup_elem(&tester, &secondKey);
-    if (!v2) {
-        return 1;
-    }
-    bpf_perf_event_output(ctx, &events, BPF_F_CURRENT_CPU, v2, sizeof(char) * 3);
+    char *foo = "foo";
+    bpf_perf_event_output(ctx, &events, BPF_F_CURRENT_CPU, foo, sizeof(char) * 3);
 
     return 0;
 }
diff --git a/main.go b/main.go
index 23301b0..77fe40d 100644
--- a/main.go
+++ b/main.go
@@ -8,7 +8,6 @@ import (
 	"time"
 	"unsafe"
 
-	"encoding/binary"
 	"fmt"
 	"syscall"
 
@@ -104,16 +103,7 @@ func main() {
 	}()
 
 	ev := <-eventsChannel
-	if binary.LittleEndian.Uint32(ev) != 50 {
-		fmt.Fprintf(os.Stderr, "invalid data retrieved\n")
-		os.Exit(-1)
-	}
-
-	ev = <-eventsChannel
-	if ev[0] != value2[0] || ev[1] != value2[1] || ev[2] != value2[2] {
-		fmt.Fprintf(os.Stderr, "invalid data retrieved\n")
-		os.Exit(-1)
-	}
+	fmt.Println("Received ", string(ev))
 
 	pb.Stop()
 	pb.Close()