Operating Systems Relocation and protection g Cannot be sure where program will be loaded in memory t address locations of variables code routines cannot be absolute w must keep a program out of other processes' partitions g Use base and limit values i address locations added to base value to map to physical addr address locations larger than limit value is an error Gao Haichang, Software School, Xidian UniversityOperating Systems Gao Haichang , Software School, Xidian University 11 Relocation and Protection  Cannot be sure where program will be loaded in memory  address locations of variables, code routines cannot be absolute  must keep a program out of other processes’ partitions  Use base and limit values  address locations added to base value to map to physical addr  address locations larger than limit value is an error