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Lecture 4

Yield mechanisms

The timer interrupt case (INT_IRQ + INT_TIMER in calls proc::yield_noreturn(). Change it to call proc::yield() instead.

The SYSCALL_YIELD case (in calls proc::yield(). Change it to call proc::yield_noreturn() instead.

System calls and information leaks

The syscall_entry implementation can leak information from the kernel. Explain how, and explain whether and why this is a problem. Find a good reference online to a similar issue in Linux or another kernel.