1 /* $NetBSD: aout_machdep.c,v 1.1 2008/11/20 10:53:09 ad Exp $ */
2
3 /*-
4 * Copyright (c) 1996, 1997, 1998, 2000, 2004, 2006, 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum, by Jason R. Thorpe of the Numerical Aerospace
9 * Simulation Facility, NASA Ames Research Center and by Julio M. Merino Vidal.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*-
34 * Copyright (c) 1982, 1987, 1990 The Regents of the University of California.
35 * All rights reserved.
36 *
37 * This code is derived from software contributed to Berkeley by
38 * William Jolitz.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 3. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
63 *
64 * @(#)machdep.c 7.4 (Berkeley) 6/3/91
65 */
66
67 #include <sys/cdefs.h>
68 __KERNEL_RCSID(0, "$NetBSD: aout_machdep.c,v 1.1 2008/11/20 10:53:09 ad Exp $");
69
70 #ifdef _KERNEL_OPT
71 #include "opt_compat_netbsd.h"
72 #endif
73
74 #include <sys/param.h>
75 #include <sys/systm.h>
76 #include <sys/exec.h>
77 #include <sys/exec_aout.h>
78
79 #ifdef COMPAT_NOMID
80 static int
exec_nomid(struct lwp * l,struct exec_package * epp)81 exec_nomid(struct lwp *l, struct exec_package *epp)
82 {
83 int error;
84 u_long midmag, magic;
85 u_short mid;
86 struct exec *execp = epp->ep_hdr;
87
88 /* check on validity of epp->ep_hdr performed by exec_out_makecmds */
89
90 midmag = ntohl(execp->a_midmag);
91 mid = (midmag >> 16) & 0xffff;
92 magic = midmag & 0xffff;
93
94 if (magic == 0) {
95 magic = (execp->a_midmag & 0xffff);
96 mid = MID_ZERO;
97 }
98
99 midmag = mid << 16 | magic;
100
101 switch (midmag) {
102 case (MID_ZERO << 16) | ZMAGIC:
103 /*
104 * 386BSD's ZMAGIC format:
105 */
106 error = exec_aout_prep_oldzmagic(l, epp);
107 break;
108
109 case (MID_ZERO << 16) | QMAGIC:
110 /*
111 * BSDI's QMAGIC format:
112 * same as new ZMAGIC format, but with different magic number
113 */
114 error = exec_aout_prep_zmagic(l, epp);
115 break;
116
117 case (MID_ZERO << 16) | NMAGIC:
118 /*
119 * BSDI's NMAGIC format:
120 * same as NMAGIC format, but with different magic number
121 * and with text starting at 0.
122 */
123 error = exec_aout_prep_oldnmagic(l, epp);
124 break;
125
126 case (MID_ZERO << 16) | OMAGIC:
127 /*
128 * BSDI's OMAGIC format:
129 * same as OMAGIC format, but with different magic number
130 * and with text starting at 0.
131 */
132 error = exec_aout_prep_oldomagic(l, epp);
133 break;
134
135 default:
136 error = ENOEXEC;
137 }
138
139 return error;
140 }
141 #endif
142
143 /*
144 * cpu_exec_aout_makecmds():
145 * CPU-dependent a.out format hook for execve().
146 *
147 * Determine of the given exec package refers to something which we
148 * understand and, if so, set up the vmcmds for it.
149 *
150 * On the i386, old (386bsd) ZMAGIC binaries and BSDI QMAGIC binaries
151 * if COMPAT_NOMID is given as a kernel option.
152 */
153 int
cpu_exec_aout_makecmds(struct lwp * l,struct exec_package * epp)154 cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp)
155 {
156 int error = ENOEXEC;
157
158 #ifdef COMPAT_NOMID
159 if ((error = exec_nomid(l, epp)) == 0)
160 return error;
161 #else
162 (void) l;
163 (void) epp;
164 #endif /* ! COMPAT_NOMID */
165
166 return error;
167 }
168