exec_aout.c revision 1.1 1 /* $NetBSD: exec_aout.c,v 1.1 1996/10/04 00:18:55 cgd 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 #ifndef lint
34 static char *rcsid = "$NetBSD: exec_aout.c,v 1.1 1996/10/04 00:18:55 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_AOUT)
43 #include <a.out.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_aout(mappedfile, mappedsize)
50 const char *mappedfile;
51 size_t mappedsize;
52 {
53 struct exec *execp;
54 int rv;
55
56 rv = 0;
57
58 if (check(0, sizeof *execp))
59 BAD;
60 execp = (struct exec *)&mappedfile[0];
61
62 if (N_BADMAG(*execp))
63 BAD;
64
65 out:
66 return (rv);
67 }
68
69 int
70 findoff_aout(mappedfile, mappedsize, vmaddr, fileoffp)
71 const char *mappedfile;
72 size_t mappedsize, *fileoffp;
73 u_long vmaddr;
74 {
75 struct exec *execp;
76 int rv;
77
78 rv = 0;
79 execp = (struct exec *)&mappedfile[0];
80
81 if (N_TXTADDR(*execp) + (execp->a_entry & (N_PAGSIZ(*execp)-1)) !=
82 execp->a_entry)
83 vmaddr += N_TXTADDR(*execp) +
84 (execp->a_entry & (N_PAGSIZ(*execp)-1)) - execp->a_entry;
85
86 if (N_TXTADDR(*execp) <= vmaddr &&
87 vmaddr < (N_TXTADDR(*execp) + execp->a_text))
88 *fileoffp = vmaddr - N_TXTADDR(*execp) + N_TXTOFF(*execp);
89 else if (N_DATADDR(*execp) <= vmaddr &&
90 vmaddr < (N_DATADDR(*execp) + execp->a_data))
91 *fileoffp = vmaddr - N_DATADDR(*execp) + N_DATOFF(*execp);
92 else
93 BAD;
94
95 out:
96 return (rv);
97 }
98
99 #endif /* NLIST_AOUT */
100