text: #include <linux/init.h>
  #include <linux/fs.h>
  #include <linux/file.h>
  #include <linux/mm_types.h>
  #include <linux/binfmts.h>
  #include <linux/a.out.h>
  
  static int load_binary(struct linux_binprm *bprm, struct pt_regs *regs)
  {
  	struct exec *eh = (struct exec *)bprm->buf;
  	unsigned long loader;
  	struct file *file;
  	int retval;
  
  	if (eh->fh.f_magic != 0x183 || (eh->fh.f_flags & 0x3000) != 0x3000)
  		return -ENOEXEC;
  
  	if (bprm->loader)
  		return -ENOEXEC;
  
  	allow_write_access(bprm->file);
  	fput(bprm->file);
  	bprm->file = NULL;
  
  	loader = bprm->vma->vm_end - sizeof(void *);
  
  	file = open_exec("/sbin/loader");
  	retval = PTR_ERR(file);
  	if (IS_ERR(file))
  		return retval;
  
  	/* Remember if the application is TASO.  */
  	bprm->taso = eh->ah.entry < 0x100000000UL;
  
  	bprm->file = file;
  	bprm->loader = loader;
  	retval = prepare_binprm(bprm);
  	if (retval < 0)
  		return retval;
  	return search_binary_handler(bprm,regs);
  }
  
  static struct linux_binfmt loader_format = {
  	.load_binary	= load_binary,
  };
  
  static int __init init_loader_binfmt(void)
  {
  	insert_binfmt(&loader_format);
  	return 0;
  }
  arch_initcall(init_loader_binfmt);
  