messing with the stack

stack.c

#include <stdio.h>
#include <stdlib.h>

// Global / Static aren't in the stack!
unsigned long stack_top;
unsigned int* location;

int main()
{
	int X = 72, Y = 30;
	int i;

	// Get location of stack
	asm volatile ("movl	%%esp, %0" : "=r" (stack_top));
	
	// Convert to address and skip ahead
	location = (int*)stack_top + 5;
	
	printf("Stack Location is %x\n", (unsigned int)location);
	
	// Print stack stuff and more...
	for(i = 0; i < 10; i++)
	{
		printf("%d:\t%d\n", i, *(location + i));
	}
	// Change value of our local variable!
	location[2] = 3;
	printf("Y is %d\n", Y);
	return 0;
}