ctf_add_function
ret = ctf_add_function(cup->cu_ctfp, idx, &cdf->cdf_fip,
ret = ctf_add_function(cup->cu_ctfp, idx, &fip, args);
if ((err = ctf_add_function(fp, idx, &fi, match->cmf_args)) !=
extern int ctf_add_function(ctf_file_t *, ulong_t, const ctf_funcinfo_t *,