link: document why TestKprobeOffset fails on arm64

cilium · Jul 26, 2022 · cd71052 · cd71052
1 parent 2fb31df
commit cd71052
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/link/kprobe_amd64_test.go b/link/kprobe_amd64_test.go
@@ -14,6 +14,9 @@ import (
 func TestKprobeOffset(t *testing.T) {
 	prog := mustLoadProgram(t, ebpf.Kprobe, 0, "")
 
+	// This test only works on amd64 because arches like arm64 don't allow
+	// probes on unaligned addresses and return EINVAL instead of EILSEQ,
+	// see arch_prepare_kprobe().
 	for i := uint64(2); i < 10; i++ {
 		k, err := Kprobe("inet6_release", prog, &KprobeOptions{Offset: i})
 		if err != nil {