Why doesn’t the Extended Stack Pointer (ESP) jump 1h in each PUSH or POP operation?
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Why doesn’t the Extended Stack Pointer (ESP) jump 1h in each PUSH or POP operation?
That’s because
PUSHpushes one whole register to the stack. On 32bit machines, that’s four byte’s worth of data.PUSHQwould change RSP by 8 in x86_64 because it pushes 64 bits.