1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/bpf.h>
 3#include <bpf/bpf_helpers.h>
 4#include "bpf_misc.h"
 5
 6#define __unused __attribute__((unused))
 7
 8struct {
 9	__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
10	__uint(max_entries, 1);
11	__uint(key_size, sizeof(__u32));
12	__uint(value_size, sizeof(__u32));
13} jmp_table SEC(".maps");
14
15int done = 0;
16
17SEC("tc")
18int classifier_0(struct __sk_buff *skb __unused)
19{
20	done = 1;
21	return 0;
22}
23
24static __noinline
25int subprog_tail(struct __sk_buff *skb)
26{
27	/* Don't propagate the constant to the caller */
28	volatile int ret = 1;
29
30	bpf_tail_call_static(skb, &jmp_table, 0);
31	return ret;
32}
33
34SEC("tc")
35int entry(struct __sk_buff *skb)
36{
37	/* Have data on stack which size is not a multiple of 8 */
38	volatile char arr[1] = {};
39
40	__sink(arr[0]);
41
42	return subprog_tail(skb);
43}
44
45char __license[] SEC("license") = "GPL";

 1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/bpf.h>
 3#include <bpf/bpf_helpers.h>
 
 4
 5#define __unused __attribute__((unused))
 6
 7struct {
 8	__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
 9	__uint(max_entries, 1);
10	__uint(key_size, sizeof(__u32));
11	__uint(value_size, sizeof(__u32));
12} jmp_table SEC(".maps");
13
14int done = 0;
15
16SEC("tc")
17int classifier_0(struct __sk_buff *skb __unused)
18{
19	done = 1;
20	return 0;
21}
22
23static __noinline
24int subprog_tail(struct __sk_buff *skb)
25{
26	/* Don't propagate the constant to the caller */
27	volatile int ret = 1;
28
29	bpf_tail_call_static(skb, &jmp_table, 0);
30	return ret;
31}
32
33SEC("tc")
34int entry(struct __sk_buff *skb)
35{
36	/* Have data on stack which size is not a multiple of 8 */
37	volatile char arr[1] = {};
 
 
38
39	return subprog_tail(skb);
40}
41
42char __license[] SEC("license") = "GPL";