/* $NetBSD: exec_ecoff.c,v 1.7 2016/09/21 16:27:55 christos Exp $ */

/*
* Copyright (c) 1996 Christopher G. Demetriou
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
*    derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* <<Id: LICENSE_GC,v 1.1 2001/10/01 23:24:05 cgd Exp>>
*/

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: exec_ecoff.c,v 1.7 2016/09/21 16:27:55 christos Exp $");
#endif /* not lint */

#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include "extern.h"

#if defined(NLIST_ECOFF)
#include <sys/exec_ecoff.h>

#define check(off, size)        ((off < 0) || (off + size > mappedsize))
#define BAD                     do { rv = -1; goto out; } while (0)

int
check_ecoff(const char *mappedfile, size_t mappedsize)
{
       const struct ecoff_exechdr *exechdrp;
       int rv;

       rv = 0;

       if (check(0, sizeof *exechdrp))
               BAD;
       exechdrp = (const struct ecoff_exechdr *)&mappedfile[0];

       if (ECOFF_BADMAG(exechdrp))
               BAD;

out:
       return (rv);
}

int
findoff_ecoff(const char *mappedfile, size_t mappedsize, u_long vmaddr,
   size_t *fileoffp, u_long text_address)
{
       const struct ecoff_exechdr *exechdrp;
       int rv;

       rv = 0;
       exechdrp = (const struct ecoff_exechdr *)&mappedfile[0];

       if (exechdrp->a.text_start <= vmaddr &&
           vmaddr < (exechdrp->a.text_start + exechdrp->a.tsize))
               *fileoffp = vmaddr - exechdrp->a.text_start +
                   ECOFF_TXTOFF(exechdrp);
       else if (exechdrp->a.data_start <= vmaddr &&
           vmaddr < (exechdrp->a.data_start + exechdrp->a.dsize))
               *fileoffp = vmaddr - exechdrp->a.data_start +
                   ECOFF_DATOFF(exechdrp);
       else
               BAD;

out:
       return (rv);
}

#endif /* NLIST_ECOFF */