Why is issuing a trap not a priviledged task?
-
03-06-2021 - |
سؤال
In solutions to a question on the book "Operating Systems Concepts" it indicates that issuing a trap not a privileged task. Why is that so?
المحلول
Some instructions need special privileges to run at all, which most of the time means only the OS gets to execute them.
Most user processes (programs) will need to issue a trap / exception to get the OS to run these instructions.
نصائح أخرى
If it were a privileged operation, it wouldn't be possible for a process to issue a system call.
لا تنتمي إلى StackOverflow