1/* $NetBSD: exec_coff.c,v 1.7 2016/09/21 16:27:55 christos 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_coff.c,v 1.7 2016/09/21 16:27:55 christos Exp $");
35#endif /* not lint */
36
37#include <sys/param.h>
38#include <sys/time.h>
39#include <sys/proc.h>
40#include <sys/types.h>
41#include <stdio.h>
42#include <string.h>
43#include "extern.h"
44
45#if defined(NLIST_COFF)
46#include <sys/exec_coff.h>
47
48#define	check(off, size)	((off < 0) || (off + size > mappedsize))
49#define	BAD			do { rv = -1; goto out; } while (0)
50
51int
52check_coff(const char *mappedfile, size_t mappedsize)
53{
54	const struct coff_exechdr *exechdrp;
55	int rv;
56
57	rv = 0;
58
59	if (check(0, sizeof *exechdrp))
60		BAD;
61	exechdrp = (const struct coff_exechdr *)&mappedfile[0];
62
63	if (COFF_BADMAG(&(exechdrp->f)))
64		BAD;
65
66out:
67	return (rv);
68}
69
70int
71findoff_coff(const char *mappedfile, size_t mappedsize, u_long vmaddr,
72    size_t *fileoffp, u_long text_addr)
73{
74	const struct coff_exechdr *exechdrp;
75	int rv;
76
77	rv = 0;
78	exechdrp = (const struct coff_exechdr *)&mappedfile[0];
79
80#define COFF_TXTOFF_XXX(fp, ap) \
81         (COFF_ROUND(COFF_HDR_SIZE + (fp)->f_nscns * \
82		    sizeof(struct coff_scnhdr), \
83		     COFF_SEGMENT_ALIGNMENT(fp, ap)))
84
85#define COFF_DATOFF_XXX(fp, ap) \
86        (COFF_TXTOFF_XXX(fp, ap) + (ap)->a_tsize)
87
88	if ((u_long)exechdrp->a.a_tstart <= vmaddr &&
89	    vmaddr < (u_long)(exechdrp->a.a_tstart + exechdrp->a.a_tsize))
90		*fileoffp = vmaddr - exechdrp->a.a_tstart +
91		    COFF_TXTOFF(&exechdrp->f, &(exechdrp->a));
92	else if ((u_long)exechdrp->a.a_dstart <= vmaddr &&
93            vmaddr < (u_long)(exechdrp->a.a_dstart + exechdrp->a.a_dsize))
94		*fileoffp = vmaddr - exechdrp->a.a_dstart +
95		    COFF_DATOFF_XXX(&exechdrp->f, &(exechdrp->a));
96	else
97		BAD;
98
99out:
100	return (rv);
101}
102
103#endif /* NLIST_COFF */
104