1 /* $NetBSD: exec_ecoff.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_ecoff.c,v 1.7 2016/09/21 16:27:55 christos 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
check_ecoff(const char * mappedfile,size_t mappedsize)49 check_ecoff(const char *mappedfile, size_t mappedsize)
50 {
51 const struct ecoff_exechdr *exechdrp;
52 int rv;
53
54 rv = 0;
55
56 if (check(0, sizeof *exechdrp))
57 BAD;
58 exechdrp = (const struct ecoff_exechdr *)&mappedfile[0];
59
60 if (ECOFF_BADMAG(exechdrp))
61 BAD;
62
63 out:
64 return (rv);
65 }
66
67 int
findoff_ecoff(const char * mappedfile,size_t mappedsize,u_long vmaddr,size_t * fileoffp,u_long text_address)68 findoff_ecoff(const char *mappedfile, size_t mappedsize, u_long vmaddr,
69 size_t *fileoffp, u_long text_address)
70 {
71 const struct ecoff_exechdr *exechdrp;
72 int rv;
73
74 rv = 0;
75 exechdrp = (const struct ecoff_exechdr *)&mappedfile[0];
76
77 if (exechdrp->a.text_start <= vmaddr &&
78 vmaddr < (exechdrp->a.text_start + exechdrp->a.tsize))
79 *fileoffp = vmaddr - exechdrp->a.text_start +
80 ECOFF_TXTOFF(exechdrp);
81 else if (exechdrp->a.data_start <= vmaddr &&
82 vmaddr < (exechdrp->a.data_start + exechdrp->a.dsize))
83 *fileoffp = vmaddr - exechdrp->a.data_start +
84 ECOFF_DATOFF(exechdrp);
85 else
86 BAD;
87
88 out:
89 return (rv);
90 }
91
92 #endif /* NLIST_ECOFF */
93