db_disasm
db_disasm(0, 0);
vaddr_t db_disasm(vaddr_t, int);
db_disasm(pc - 2, 0);
addr = db_disasm(addr, 0);
addr = db_disasm(addr, 1);
db_disasm(loc, 0);
vaddr_t db_disasm(vaddr_t, int);