Why does the ESP referring to the address in a stack jumps 4h each time?

Question

Why doesn't the Extended Stack Pointer (ESP) jump 1h in each PUSH or POP operation?

score 4 · Accepted Answer · answered Sep 23 '11 at 14:32

4

That's because PUSH pushes one whole register to the stack. On 32bit machines, that's four byte's worth of data.

PUSHQ would change RSP by 8 in x86_64 because it pushes 64 bits.

answered Sep 23 '11 at 14:32

Mat

Your answer is brief, clear,easy, fast, and accurate. thanks for clearing things up for me. – Obzajd Sep 23 '11 at 14:37

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