bpf_find_containing_subprog
struct bpf_subprog_info *bpf_find_containing_subprog(struct bpf_verifier_env *env, int off);
subprog = bpf_find_containing_subprog(env, callchain->sp_starts[callchain->curframe]);
subprog = bpf_find_containing_subprog(env, this_subprog_start);
subprog = bpf_find_containing_subprog(env, off);
subprog = bpf_find_containing_subprog(env, off);
caller = bpf_find_containing_subprog(env, t);
callee = bpf_find_containing_subprog(env, w);
subprog = bpf_find_containing_subprog(env, t);
subprog = bpf_find_containing_subprog(env, t);
p = bpf_find_containing_subprog(env, off);