Function call procedure

parameter in stack: Press the parameter from right to left into the system stack

Return address into the stack: the next instruction address of the current code area call instruction is pressed into the stack for the function to return to continue execution

Code Area jump: The processor jumps from the current code area to the entrance of the called function

Stack frame adjustment: specifically including
Save current stack frame state value, ready to use (EBP into stack) push EBP when restoring this stack frame later

Switches the current stack frame to the new stack frame. (Load ESP value into EBP, update stack frame bottom) mov ebp,esp
Allocates space for new stack frames. (Put the ESP minus the size of the required space, raising the top of the stack) sub Esp,xxh

Function call procedure