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exec_ecoff.c revision 1.2 
      1 /*	$NetBSD: exec_ecoff.c,v 1.2 1997/10/17 10:28:26 lukem Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *      This product includes software developed by Christopher G. Demetriou
     17  *	for the NetBSD Project.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 #ifndef lint
     35 __RCSID("$NetBSD: exec_ecoff.c,v 1.2 1997/10/17 10:28:26 lukem Exp $");
     36 #endif /* not lint */
     37 
     38 #include <sys/types.h>
     39 #include <stdio.h>
     40 #include <string.h>
     41 #include "extern.h"
     42 
     43 #if defined(NLIST_ECOFF)
     44 #include <sys/exec_ecoff.h>
     45 
     46 #define	check(off, size)	((off < 0) || (off + size > mappedsize))
     47 #define	BAD			do { rv = -1; goto out; } while (0)
     48 
     49 int
     50 check_ecoff(mappedfile, mappedsize)
     51 	const char *mappedfile;
     52 	size_t mappedsize;
     53 {
     54 	struct ecoff_exechdr *exechdrp;
     55 	int rv;
     56 
     57 	rv = 0;
     58 
     59 	if (check(0, sizeof *exechdrp))
     60 		BAD;
     61 	exechdrp = (struct ecoff_exechdr *)&mappedfile[0];
     62 
     63 	if (ECOFF_BADMAG(exechdrp))
     64 		BAD;
     65 
     66 out:
     67 	return (rv);
     68 }
     69 
     70 int
     71 findoff_ecoff(mappedfile, mappedsize, vmaddr, fileoffp)
     72 	const char *mappedfile;
     73 	size_t mappedsize, *fileoffp;
     74 	u_long vmaddr;
     75 {
     76 	struct ecoff_exechdr *exechdrp;
     77 	int rv;
     78 
     79 	rv = 0;
     80 	exechdrp = (struct ecoff_exechdr *)&mappedfile[0];
     81 
     82 	if (exechdrp->a.text_start <= vmaddr &&
     83 	    vmaddr < (exechdrp->a.text_start + exechdrp->a.tsize))
     84 		*fileoffp = vmaddr - exechdrp->a.text_start +
     85 		    ECOFF_TXTOFF(exechdrp);
     86 	else if (exechdrp->a.data_start <= vmaddr &&
     87             vmaddr < (exechdrp->a.data_start + exechdrp->a.dsize))
     88 		*fileoffp = vmaddr - exechdrp->a.data_start +
     89 		    ECOFF_DATOFF(exechdrp);
     90 	else
     91 		BAD;
     92 
     93 out:
     94 	return (rv);
     95 }
     96 
     97 #endif /* NLIST_ECOFF */
     98