How are these elements put together in order to build a secure enviorment for code execution? Harware-related: - computers are multiprogrammed - There are at least two processors modes: user-mode and kernel-mode - There is a MMU: Memory Management Unite - Interrupts have higher priority than processes Software-related: - There is and operating system - OS - sitting in-between the hardware and applications - The OS offers a collection of system calls, SYSCALLS - Processes compete for protected resources, whilst threads share internal resources by default Processes can be preempted at any moment and they must obey the READY-EXECUTE-WAIT life-cycle
How are these elements put together in order to build a secure enviorment for code execution?
Harware-related:
- computers are multiprogrammed
- There are at least two processors modes: user-mode and kernel-mode
- There is a MMU: Memory Management Unite
- Interrupts have higher priority than processes
Software-related:
- There is and
- The OS offers a collection of system calls, SYSCALLS
- Processes compete for protected resources, whilst threads share internal resources by default
Processes can be preempted at any moment and they must obey the READY-EXECUTE-WAIT life-cycle.
All these elements are necessary for a computer to work and it depends on the one other for execution of program or instruction. Computers can be manipulated as required by knowing all the working of computers. This all make the computer system secure and increase performance of computer.
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