exec_aout.c revision 1.4 1 /* $NetBSD: exec_aout.c,v 1.4 2000/06/14 06:49:26 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 #include <sys/cdefs.h>
34 #ifndef lint
35 __RCSID("$NetBSD: exec_aout.c,v 1.4 2000/06/14 06:49:26 cgd 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_AOUT)
44 #include <a.out.h>
45
46 #define check(off, size) ((off < 0) || (off + size > mappedsize))
47 #define BAD do { rv = -1; goto out; } while (0)
48
49 extern int T_flag_specified;
50 extern u_long text_start;
51
52 int
53 check_aout(mappedfile, mappedsize)
54 const char *mappedfile;
55 size_t mappedsize;
56 {
57 struct exec *execp;
58 int rv;
59
60 rv = 0;
61
62 if (check(0, sizeof *execp))
63 BAD;
64 execp = (struct exec *)&mappedfile[0];
65
66 if (N_BADMAG(*execp))
67 BAD;
68
69 out:
70 return (rv);
71 }
72
73 int
74 findoff_aout(mappedfile, mappedsize, vmaddr, fileoffp)
75 const char *mappedfile;
76 size_t mappedsize, *fileoffp;
77 u_long vmaddr;
78 {
79 struct exec *execp;
80 int rv;
81
82 rv = 0;
83 execp = (struct exec *)&mappedfile[0];
84
85 if (N_TXTADDR(*execp) + (execp->a_entry & (N_PAGSIZ(*execp)-1)) !=
86 execp->a_entry)
87 vmaddr += N_TXTADDR(*execp) +
88 (execp->a_entry & (N_PAGSIZ(*execp)-1)) - execp->a_entry;
89
90 /* apply correction based on the supplied text start address, if any */
91 if (T_flag_specified)
92 vmaddr += N_TXTADDR(*execp) - text_start;
93
94 if (N_TXTADDR(*execp) <= vmaddr &&
95 vmaddr < (N_TXTADDR(*execp) + execp->a_text))
96 *fileoffp = vmaddr - N_TXTADDR(*execp) + N_TXTOFF(*execp);
97 else if (N_DATADDR(*execp) <= vmaddr &&
98 vmaddr < (N_DATADDR(*execp) + execp->a_data))
99 *fileoffp = vmaddr - N_DATADDR(*execp) + N_DATOFF(*execp);
100 else
101 BAD;
102
103 out:
104 return (rv);
105 }
106
107 #endif /* NLIST_AOUT */
108