0 votes 0 votes To change mode from privileged(kernel) to nonprivileged(user) is privileged instruction always necessary or it is architecture dependent? Operating System operating-system + – Shreya Roy asked Dec 12, 2016 Shreya Roy 251 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes Privileged instructions are always necessary in such case because we have to change PTBR which can be changed by privileged instruction only. Though we don't need an interrupt in this case. Aghori answered Dec 12, 2016 Aghori comment Share Follow See all 0 reply Please log in or register to add a comment.