1d2db08c7SJohn Fastabend // SPDX-License-Identifier: GPL-2.0 2d2db08c7SJohn Fastabend 3d2db08c7SJohn Fastabend #include <linux/bpf.h> 4d2db08c7SJohn Fastabend #include <bpf/bpf_helpers.h> 5d2db08c7SJohn Fastabend 6d2db08c7SJohn Fastabend #define MAX_STACK_RAWTP 10 7d2db08c7SJohn Fastabend 8d2db08c7SJohn Fastabend SEC("raw_tracepoint/sys_enter") bpf_prog2(void * ctx)9d2db08c7SJohn Fastabendint bpf_prog2(void *ctx) 10d2db08c7SJohn Fastabend { 11d2db08c7SJohn Fastabend __u64 stack[MAX_STACK_RAWTP]; 12d2db08c7SJohn Fastabend int error; 13d2db08c7SJohn Fastabend 14d2db08c7SJohn Fastabend /* set all the flags which should return -EINVAL */ 15d2db08c7SJohn Fastabend error = bpf_get_stack(ctx, stack, 0, -1); 16d2db08c7SJohn Fastabend if (error < 0) 17d2db08c7SJohn Fastabend goto loop; 18d2db08c7SJohn Fastabend 19d2db08c7SJohn Fastabend return error; 20d2db08c7SJohn Fastabend loop: 21d2db08c7SJohn Fastabend while (1) { 22d2db08c7SJohn Fastabend error++; 23d2db08c7SJohn Fastabend } 24d2db08c7SJohn Fastabend } 25d2db08c7SJohn Fastabend 26d2db08c7SJohn Fastabend char _license[] SEC("license") = "GPL"; 27