1/*
2 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * Copyright (c) 1994, The University of Utah and
30 * the Center for Software Science at the University of Utah (CSS).
31 * All rights reserved.
32 *
33 * Permission to use, copy, modify and distribute this software and its
34 * documentation is hereby granted, provided that both the copyright
35 * notice and this permission notice appear in all copies of the
36 * software, derivative works or modified versions, and any portions
37 * thereof, and that both notices appear in supporting documentation.
38 *
39 * THE UNIVERSITY OF UTAH AND CSS ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
40 * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSS DISCLAIM ANY LIABILITY OF
41 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
42 *
43 * CSS requests users of this software to return to css-dist@cs.utah.edu any
44 * improvements that they make and grant CSS redistribution rights.
45 *
46 */
47
48#ifndef _BSD_PPC_EXEC_H_
49#define _BSD_PPC_EXEC_H_
50
51
52#include <sys/appleapiopts.h>
53
54#ifdef BSD_KERNEL_PRIVATE
55/* Size of a page in an object file. */
56#define	__LDPGSZ	4096
57
58/* Valid magic number check. */
59#define	N_BADMAG(ex) \
60	((ex).a_magic != NMAGIC && (ex).a_magic != OMAGIC && \
61	    (ex).a_magic != ZMAGIC)
62
63/* Address of the bottom of the text segment. */
64#define N_TXTADDR(X)	0
65
66/* Address of the bottom of the data segment. */
67#define N_DATADDR(ex) \
68	(N_TXTADDR(ex) + ((ex).a_magic == OMAGIC ? (ex).a_text \
69	: __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
70
71/* Text segment offset. */
72#define	N_TXTOFF(ex) \
73	((ex).a_magic == ZMAGIC ? __LDPGSZ : sizeof(struct exec))
74
75/* Data segment offset. */
76#define	N_DATOFF(ex) \
77	(N_TXTOFF(ex) + ((ex).a_magic != ZMAGIC ? (ex).a_text : \
78	__LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
79
80/* Symbol table offset. */
81#define N_SYMOFF(ex) \
82	(N_TXTOFF(ex) + (ex).a_text + (ex).a_data + (ex).a_trsize + \
83	    (ex).a_drsize)
84
85/* String table offset. */
86#define	N_STROFF(ex) 	(N_SYMOFF(ex) + (ex).a_syms)
87
88/* Description of the object file header (a.out format). */
89struct exec {
90#define	OMAGIC	0407		/* old impure format */
91#define	NMAGIC	0410		/* read-only text */
92#define	ZMAGIC	0413		/* demand load format */
93#define QMAGIC	0314		/* demand load format. Header in text. */
94	unsigned int	a_magic;	/* magic number */
95
96	unsigned int	a_text;		/* text segment size */
97	unsigned int	a_data;		/* initialized data size */
98	unsigned int	a_bss;		/* uninitialized data size */
99	unsigned int	a_syms;		/* symbol table size */
100	unsigned int	a_entry;	/* entry point */
101	unsigned int	a_trsize;	/* text relocation size */
102	unsigned int	a_drsize;	/* data relocation size */
103};
104
105#endif /* BSD_KERNEL_PRIVATE */
106
107#endif /* _BSD_PPC_EXEC_H_ */
108
109