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310555003 lab5#164

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Commits

Commits on Apr 19, 2022

• Fix user stack

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  4f6780b

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• Update README.md

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Commits on Apr 21, 2022

• Add save_and_disable_interrupt and restore_interrupt

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Commits on Apr 22, 2022

• Implement kernel thread

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Commits on Apr 25, 2022

• Implement the mechanism for kernel thread termination

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• Implement user process, syscall exit

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• Implement syscall getpid, uart_write

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• Implement syscall uart_read

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• Implement syscall mbox_call

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Commits on Apr 26, 2022

• Implement syscall kill_pid

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• Implement syscall exec

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• Implement syscall fork

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• Video player (syscall.img) can work

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• Adjust the frequency of rescheduling

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Commits on Apr 29, 2022

• Implement POSIX signal

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• Fix: adjust x30 (lr) in fork

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