Re: [BUG] Failed to obtain stack trace via bpf_get_stackid on ARM64 architecture

When I use bpf_program__attach_kprobe_multi_opts to hook a BPF program that contains the bpf_get_stackid function on the arm64 architecture,
I find that the stack trace cannot be obtained. The trace->nr in __bpf_get_stackid is 0, and the function returns -EFAULT.

For example:

diff --git a/tools/testing/selftests/bpf/progs/kprobe_multi.c b/tools/testing/selftests/bpf/progs/kprobe_multi.c
index 9e1ca8e34913..844fa88cdc4c 100644
--- a/tools/testing/selftests/bpf/progs/kprobe_multi.c
+++ b/tools/testing/selftests/bpf/progs/kprobe_multi.c

@@ -36,6 +36,15 @@ __u64 kretprobe_test6_result = 0;
 __u64 kretprobe_test7_result = 0;
 __u64 kretprobe_test8_result = 0;

+typedef __u64 stack_trace_t[2];
+
+struct {
+       __uint(type, BPF_MAP_TYPE_STACK_TRACE);
+       __uint(max_entries, 1024);
+       __type(key, __u32);
+       __type(value, stack_trace_t);
+} stacks SEC(".maps");
+
 static void kprobe_multi_check(void *ctx, bool is_return)
 {
        if (bpf_get_current_pid_tgid() >> 32 != pid)

@@ -100,7 +109,9 @@ int test_kretprobe(struct pt_regs *ctx)
 SEC("kprobe.multi")
 int test_kprobe_manual(struct pt_regs *ctx)
 {
+       int id = bpf_get_stackid(ctx, &stacks, 0);