GAS Assembly program segmentation fault (writing to auto variable)

Question

I intend to do this in C:

#include
int main() {
  int arr[5];
  arr[0] = 5;
  arr[1] = 0;
  arr[2] = 1;
  arr[3] = 3;
  arr[4] = 4;
  int max         


        

Answer 1

I am having a segmentation fault on the very first instruction movl $5, -20(%ebp).

You are not allocating any space on the stack for arr (i.e.: int arr[5]):

pushl %ebp
movl %esp, %ebp
subl $20,%esp //<--- memory allocation

In order to deallocate the memory allocated on the stack by restoring the previous stack frame, use the leave instruction just before ret.