I am trying to solve an exercise I got. The task is, to read 10 integers from the terminal and print them out in reversed order. To do this the stack should be used. I've tried this:
%include "asm_io.inc"
segment .data
prompt db "Please enter a number: ", 0
segment .text
global asm_main
asm_main:
enter 0,0
pusha
mov ecx, 10 ; for loop counter
for_loop:
mov eax, prompt
call print_string ; print prompt
call read_int ; read input
push dword eax ; push input to stack
loop for_loop
mov ecx, 10 ; set loop counter for output
swap_loop:
pop eax ; get last input from stack
call print_int
call print_nl
add esp, 4 ; increment esp for next value to take from stack
loop swap_loop
popa
mov eax, 0
leave
ret
When I execute the program and enter all the numbers from 1 to 10 successively I get the following result:
Should Be:
10 10
8 9
6 8
4 7
2 6
-1217249280 5
-1079315368 4
0 3
-1079315312 2
-1079315336 1
Just remove the line add esp, 4
.
The stack pointer is already incremented by pop eax
.