What does "push ebp" mean in x86 assemby? [duplicate]

This question already has answers here: What is the function of the push / pop instructions used on registers in x86 assembly? 开发者_如何学Python (5 answers) Closed 7 years ago.

I disassembled an .exe file and got this as its first line.

push ebp

• What does it mean?
• Why ebp?
• Does it have anything to do with pop command? even though I don't see it in the disassembly!

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push ebp just means pushing whatever is in register ebp onto the stack. ebp stores the stack pointer by convention.

This is generally used to establish a stack frame, followed by

mov     ebp, esp

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It pushes the value of the EBP register on the stack, and is most commonly used to set up a stackframe. Pop retrieves a value from the stack.

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The push instruction saves the value of a register onto the stack. The value can later be retrieved using a pop-instruction.

Wikipedia Stack (data structure): http://en.wikipedia.org/wiki/Stack_%28data_structure%29