arch/alpha/kernel/binfmt_loader.c

   1 #include <linux/init.h>
   2 #include <linux/fs.h>
   3 #include <linux/file.h>
   4 #include <linux/mm_types.h>
   5 #include <linux/binfmts.h>
   6 #include <linux/a.out.h>
   7
   8 static int load_binary(struct linux_binprm *bprm, struct pt_regs *regs)
   9 {
  10         struct exec *eh = (struct exec *)bprm->buf;
  11         unsigned long loader;
  12         struct file *file;
  13         int retval;
  14
  15         if (eh->fh.f_magic != 0x183 || (eh->fh.f_flags & 0x3000) != 0x3000)
  16                 return -ENOEXEC;
  17
  18         if (bprm->loader)
  19                 return -ENOEXEC;
  20
  21         allow_write_access(bprm->file);
  22         fput(bprm->file);
  23         bprm->file = NULL;
  24
  25         loader = bprm->vma->vm_end - sizeof(void *);
  26
  27         file = open_exec("/sbin/loader");
  28         retval = PTR_ERR(file);
  29         if (IS_ERR(file))
  30                 return retval;
  31
  32         /* Remember if the application is TASO.  */
  33         bprm->taso = eh->ah.entry < 0x100000000UL;
  34
  35         bprm->file = file;
  36         bprm->loader = loader;
  37         retval = prepare_binprm(bprm);
  38         if (retval < 0)
  39                 return retval;
  40         return search_binary_handler(bprm,regs);
  41 }
  42
  43 static struct linux_binfmt loader_format = {
  44         .load_binary    = load_binary,
  45 };
  46
  47 static int __init init_loader_binfmt(void)
  48 {
  49         return insert_binfmt(&loader_format);
  50 }
  51 arch_initcall(init_loader_binfmt);