- 1 year ago
Assembly MASM32 push and pop
In Assembly language using MASM32, push
and pop
are instructions used for working with the stack.
The stack is a section of memory that is used for temporary storage of data, and it works on a Last-In-First-Out (LIFO) basis. When data is pushed onto the stack, it is added to the top of the stack. When data is popped from the stack, it is removed from the top of the stack.
Here's how you can use the push
and pop
instructions in MASM32:
Push
The push
instruction is used to push a value onto the stack. The syntax for the push
instruction is as follows:
assemblypush value
where value
is the value to be pushed onto the stack.
For example, to push the value 10 onto the stack, you can use the following code:
assemblymov eax, 10
push eax
This code moves the value 10 into the eax
register and then pushes the value onto the stack.
Pop
The pop
instruction is used to pop a value from the stack. The syntax for the pop
instruction is as follows:
assemblypop destination
where destination
is the register or memory location where the popped value will be stored.
For example, to pop a value from the stack into the eax
register, you can use the following code:
assemblypop eax
This code pops the top value from the stack and stores it in the eax
register.
It is important to note that when using push
and pop
, the stack pointer (esp
register) is automatically adjusted to point to the next available location on the stack. Therefore, you do not need to manually adjust the stack pointer when using these instructions.