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Privileged modes
dd
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Operating System
Sep 13, 2018
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The four privileged modes (Ring 0 to Ring 3 as provided by x86) are the minimum levels of execution modes required for an operating system to operate correctly
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dd
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harsh yadav
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Dec 4, 2018
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#Privileged vs Non Privileged mode
A CPU has 2 modes, privileged and non-privileged. In order to change the mode from non-privileged to privileged normally software interrupt is used but can a hardware interrupt can change the mode from non-privileged to privileged?
harsh yadav
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Pawan Kumar 2
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Operating System
May 30, 2018
1,520
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Privileged vs Non Privileged mode
Switching from privileged to non-privileged mode requires a non-privileged instruction according to this link https://gateoverflow.in/706/gate2001-1-13 But below has been quoted in this link https://gateoverflow.in/445/gate2008-34 http://www.cs.rochester ... RFE (return from exception) instruction. Kindly clear this ... Any sort of help is appreciated ... Thanks :)
Pawan Kumar 2
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May 30, 2018
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1.5k
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operating-system
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cse7
asked
in
Operating System
Oct 22, 2016
575
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does operating system always runs in privileged mode
does operating system always runs in privileged mode or is there any other way also?
cse7
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Operating System
Oct 22, 2016
by
cse7
575
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operating-system
2
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2
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1
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4
resilientknight
asked
in
Operating System
Sep 1, 2016
1,086
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OS - Privileged,non-privileged concept,typical/crucial
can a non privileged instruction be executed in privileged mode?(like when returning from kernel to user mode) or is it necessary to make it a privileged instruction?
resilientknight
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Operating System
Sep 1, 2016
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resilientknight
1.1k
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operating-system
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