The following assembly-code function lets us determine the behavior of the instruction popq %rsp for x86-64: We

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The following assembly-code function lets us determine the behavior of the instruction popq %rsp for x86-64:

1 2 3 5 6 7 8 text .globl poptest poptest: movq pushq popa movq movg ret %rap, %rdi $0xabcd %rsp %rap. %rax

We find this function always returns 0xabcd. What does this imply about the behavior of popq %rsp? What other Y86-64 instruction would have the exact same behavior?

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Computer Systems A Programmers Perspective

ISBN: 9781292101767

3rd Global Edition

Authors: Randal E. Bryant, David R. O'Hallaron

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