mdb_tgt_add_sysexit
id = mdb_tgt_add_sysexit(mdb.m_target, sysnum,
(void) mdb_tgt_add_sysexit(t, SYS_vfork, hflag, pt_fork, NULL);
(void) mdb_tgt_add_sysexit(t, SYS_forksys, hflag, pt_fork, NULL);
(void) mdb_tgt_add_sysexit(t, SYS_execve, hflag, pt_exec, NULL);
extern int mdb_tgt_add_sysexit(mdb_tgt_t *, int, int, mdb_tgt_se_f *, void *);