usr.sbin/mdsetimage/exec_ecoff.c

   1 /* $NetBSD: exec_ecoff.c,v 1.5 2001/10/01 23:32:34 cgd Exp $ */
   2
   3 /*
   4  * Copyright (c) 1996 Christopher G. Demetriou
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  * <<Id: LICENSE_GC,v 1.1 2001/10/01 23:24:05 cgd Exp>>
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __RCSID("$NetBSD: exec_ecoff.c,v 1.5 2001/10/01 23:32:34 cgd Exp $");
  35 #endif /* not lint */
  36
  37 #include <sys/types.h>
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include "extern.h"
  41
  42 #if defined(NLIST_ECOFF)
  43 #include <sys/exec_ecoff.h>
  44
  45 #define check(off, size)        ((off < 0) || (off + size > mappedsize))
  46 #define BAD                     do { rv = -1; goto out; } while (0)
  47
  48 int
  49 check_ecoff(mappedfile, mappedsize)
  50         const char *mappedfile;
  51         size_t mappedsize;
  52 {
  53         const struct ecoff_exechdr *exechdrp;
  54         int rv;
  55
  56         rv = 0;
  57
  58         if (check(0, sizeof *exechdrp))
  59                 BAD;
  60         exechdrp = (const struct ecoff_exechdr *)&mappedfile[0];
  61
  62         if (ECOFF_BADMAG(exechdrp))
  63                 BAD;
  64
  65 out:
  66         return (rv);
  67 }
  68
  69 int
  70 findoff_ecoff(mappedfile, mappedsize, vmaddr, fileoffp)
  71         const char *mappedfile;
  72         size_t mappedsize, *fileoffp;
  73         u_long vmaddr;
  74 {
  75         const struct ecoff_exechdr *exechdrp;
  76         int rv;
  77
  78         rv = 0;
  79         exechdrp = (const struct ecoff_exechdr *)&mappedfile[0];
  80
  81         if (exechdrp->a.text_start <= vmaddr &&
  82             vmaddr < (exechdrp->a.text_start + exechdrp->a.tsize))
  83                 *fileoffp = vmaddr - exechdrp->a.text_start +
  84                     ECOFF_TXTOFF(exechdrp);
  85         else if (exechdrp->a.data_start <= vmaddr &&
  86             vmaddr < (exechdrp->a.data_start + exechdrp->a.dsize))
  87                 *fileoffp = vmaddr - exechdrp->a.data_start +
  88                     ECOFF_DATOFF(exechdrp);
  89         else
  90                 BAD;
  91
  92 out:
  93         return (rv);
  94 }
  95
  96 #endif /* NLIST_ECOFF */