It’s said that the leave instruction is the same as :
mov esp,ebp
pop ebp
But what is mov esp,ebp here for? It doesn’t seem valid to me…
It’s said that the leave instruction is the same as : mov esp,ebp pop
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It’s said that the leave instruction is the same as :
mov esp,ebp
pop ebp
But what is mov esp,ebp here for? It doesn’t seem valid to me…
mov esp,ebpsets the stack pointer to the base frame address, effectively releasing the whole frame. (Don’t forget that this is Intel syntax, the destination comes first.) If you didn’t do it, once you callret, you would still be using the called function’s stack frame with your calling function, with crashtastic consequences.