arch/alpha/kernel/binfmt_loader.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/init.h>
   3 #include <linux/fs.h>
   4 #include <linux/file.h>
   5 #include <linux/mm_types.h>
   6 #include <linux/binfmts.h>
   7 #include <linux/a.out.h>
   8
   9 static int load_binary(struct linux_binprm *bprm)
  10 {
  11         struct exec *eh = (struct exec *)bprm->buf;
  12         unsigned long loader;
  13         struct file *file;
  14         int retval;
  15
  16         if (eh->fh.f_magic != 0x183 || (eh->fh.f_flags & 0x3000) != 0x3000)
  17                 return -ENOEXEC;
  18
  19         if (bprm->loader)
  20                 return -ENOEXEC;
  21
  22         loader = bprm->vma->vm_end - sizeof(void *);
  23
  24         file = open_exec("/sbin/loader");
  25         retval = PTR_ERR(file);
  26         if (IS_ERR(file))
  27                 return retval;
  28
  29         /* Remember if the application is TASO.  */
  30         bprm->taso = eh->ah.entry < 0x100000000UL;
  31
  32         bprm->interpreter = file;
  33         bprm->loader = loader;
  34         return 0;
  35 }
  36
  37 static struct linux_binfmt loader_format = {
  38         .load_binary    = load_binary,
  39 };
  40
  41 static int __init init_loader_binfmt(void)
  42 {
  43         insert_binfmt(&loader_format);
  44         return 0;
  45 }
  46 arch_initcall(init_loader_binfmt);