Question: Consider the following lines taken from the retu assembly function: 0743 mov (sp),KISA6 0744 mov $_u,r0 0745 1: 0746 mov (r0)+,sp 0747 mov (r0)+,r5 What

Consider the following lines taken from the retu assembly function:

0743 mov (sp),KISA6

0744 mov $_u,r0

0745 1:

0746 mov (r0)+,sp

0747 mov (r0)+,r5

What is the purpose of line 0743? In particular, how is the kernel virtual address space aected?

What is the combined eect of lines 0744-0747? Why is it crucial for these lines to be executed

after line 0743 (e.g., what would happen if they weren't)?

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