Sean Barker Recap: Architecture Support for OS 1 OS Service Hardware Support Protection Kernel/user mode, privileged instructions, base/limit registers Interrupts Interrupt vectors System calls Trap instructions and trap vectors I/O Interrupts Scheduling, error recovery, accounting Timer Synchronization Atomic instructions Virtual memory Translation look-aside buffers Sean Barker System Calls 2
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Sean Barker
Recap: Architecture Support for OS
1
OS Service Hardware Support
Protection Kernel/user mode, privileged instructions, base/limit registers
Interrupts Interrupt vectors
System calls Trap instructions and trap vectors
I/O InterruptsScheduling, error recovery,
accounting Timer
Synchronization Atomic instructions
Virtual memory Translation look-aside buffers
Sean Barker
System Calls
2
Sean Barker
Making a System Call
3
user mode
kernel mode
Sean Barker
Example System Calls
4
Sean Barker
System Call Implementation
5
Sean Barker
OS Architecture: Mac OS X
6
Sean Barker
OS Architecture: Windows 8
7
Sean Barker
Monolithic Kernel Design
8
Sean Barker
Layered OS Design
9
User programs
Device drivers
Virtual memory
I/O channel
CPU scheduler
Hardware
Sean Barker
Microkernel Design
10
Sean Barker
Hybrid Design in Mac OS X
11
Sean Barker
Modular Design
12
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