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Editorial Team
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Asked: 2026-06-18T02:09:34+00:00

ATT syntax. I’ve noticed that library routines in C often use the following snippet

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ATT syntax.

I’ve noticed that library routines in C often use the following snippet of assembly code:

call next
next:
popl %eax
  • What value is %eax storing here and why is it getting popped?
  • What’s the purpose of this snippet?
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1 Answer

  1. Editorial Team

    What is the value of %eax after this sequence of instructions?

    call
    next

    next: popl %eax

    Whatever the address of next is

    (the memory address where popl instruction is) Note: this is NOT the
    PC, but it is related to it

    – PC is the address of the next instruction to be executed; %eax now
    has address of most recently executed instruction (the popl)

    See

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