mdb_gelf_symtab_insert
extern void mdb_gelf_symtab_insert(mdb_gelf_symtab_t *,
mdb_gelf_symtab_insert(mdb.m_prsym, argv[i].a_un.a_str, &sym);
mdb_gelf_symtab_insert(mdb.m_prsym, "_start", &s1);