tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/bpf.h>
4#include <bpf/bpf_helpers.h>
5#include "bpf_misc.h"
6
7struct {
8 __uint(type, BPF_MAP_TYPE_ARRAY);
9 __uint(max_entries, 1);
10 __type(key, __u32);
11 __type(value, __u32);
12} map_array SEC(".maps");
13
14SEC("socket")
15__description("invalid map type for tail call")
16__failure __msg("expected prog array map for tail call")
17__failure_unpriv
18__naked void invalid_map_for_tail_call(void)
19{
20 asm volatile (" \
21 r2 = %[map_array] ll; \
22 r3 = 0; \
23 call %[bpf_tail_call]; \
24 exit; \
25" :
26 : __imm(bpf_tail_call),
27 __imm_addr(map_array)
28 : __clobber_all);
29}
30
31char _license[] SEC("license") = "GPL";