linux-imx

/*

 *  linux/fs/binfmt_em86.c

 *

 *  Based on linux/fs/binfmt_script.c

 *  Copyright (C) 1996  Martin von Löwis

 *  original #!-checking implemented by tytso.

 *

 *  em86 changes Copyright (C) 1997  Jim Paradis

 */

​

#include <linux/module.h>

#include <linux/string.h>

#include <linux/stat.h>

#include <linux/binfmts.h>

#include <linux/elf.h>

#include <linux/init.h>

#include <linux/fs.h>

#include <linux/file.h>

#include <linux/errno.h>

​

​

#define EM86_INTERP "/usr/bin/em86"

#define EM86_I_NAME "em86"

​

static int load_em86(struct linux_binprm *bprm)

{

    const char *i_name, *i_arg;

    char *interp;

    struct file * file;

    int retval;

    struct elfhdr   elf_ex;

​

    /* Make sure this is a Linux/Intel ELF executable... */

    elf_ex = *((struct elfhdr *)bprm->buf);

​

    if (memcmp(elf_ex.e_ident, ELFMAG, SELFMAG) != 0)

        return  -ENOEXEC;

​

    /* First of all, some simple consistency checks */

    if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||

        (!((elf_ex.e_machine == EM_386) || (elf_ex.e_machine == EM_486))) ||

        !bprm->file->f_op->mmap) {

            return -ENOEXEC;

    }

​

    /* Need to be able to load the file after exec */

    if (bprm->interp_flags & BINPRM_FLAGS_PATH_INACCESSIBLE)

        return -ENOENT;

​

    allow_write_access(bprm->file);

    fput(bprm->file);

    bprm->file = NULL;

​

    /* Unlike in the script case, we don't have to do any hairy

     * parsing to find our interpreter... it's hardcoded!

     */

    interp = EM86_INTERP;

    i_name = EM86_I_NAME;

    i_arg = NULL;       /* We reserve the right to add an arg later */

​

    /*

     * Splice in (1) the interpreter's name for argv[0]

     *           (2) (optional) argument to interpreter