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Sourcecode: linux-2.6 version File versions

binfmt_loader.c

#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)
{
      return register_binfmt(&loader_format);
}
arch_initcall(init_loader_binfmt);

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