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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*-
23: * Copyright (c) 1992, 1993
24: * The Regents of the University of California. All rights reserved.
25: *
26: * Redistribution and use in source and binary forms, with or without
27: * modification, are permitted provided that the following conditions
28: * are met:
29: * 1. Redistributions of source code must retain the above copyright
30: * notice, this list of conditions and the following disclaimer.
31: * 2. Redistributions in binary form must reproduce the above copyright
32: * notice, this list of conditions and the following disclaimer in the
33: * documentation and/or other materials provided with the distribution.
34: * 3. All advertising materials mentioning features or use of this software
35: * must display the following acknowledgement:
36: * This product includes software developed by the University of
37: * California, Berkeley and its contributors.
38: * 4. Neither the name of the University nor the names of its contributors
39: * may be used to endorse or promote products derived from this software
40: * without specific prior written permission.
41: *
42: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
43: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
46: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52: * SUCH DAMAGE.
53: *
54: * @(#)exec.h 8.1 (Berkeley) 6/11/93
55: */
56:
57: /* Size of a page in an object file. */
58: #define __LDPGSZ 4096
59:
60: /* Valid magic number check. */
61: #define N_BADMAG(ex) \
62: ((ex).a_magic != NMAGIC && (ex).a_magic != OMAGIC && \
63: (ex).a_magic != ZMAGIC)
64:
65: /* Address of the bottom of the text segment. */
66: #define N_TXTADDR(X) 0
67:
68: /* Address of the bottom of the data segment. */
69: #define N_DATADDR(ex) \
70: (N_TXTADDR(ex) + ((ex).a_magic == OMAGIC ? (ex).a_text \
71: : __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
72:
73: /* Text segment offset. */
74: #define N_TXTOFF(ex) \
75: ((ex).a_magic == ZMAGIC ? __LDPGSZ : sizeof(struct exec))
76:
77: /* Data segment offset. */
78: #define N_DATOFF(ex) \
79: (N_TXTOFF(ex) + ((ex).a_magic != ZMAGIC ? (ex).a_text : \
80: __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
81:
82: /* Symbol table offset. */
83: #define N_SYMOFF(ex) \
84: (N_TXTOFF(ex) + (ex).a_text + (ex).a_data + (ex).a_trsize + \
85: (ex).a_drsize)
86:
87: /* String table offset. */
88: #define N_STROFF(ex) (N_SYMOFF(ex) + (ex).a_syms)
89:
90: /* Description of the object file header (a.out format). */
91: struct exec {
92: #define OMAGIC 0407 /* old impure format */
93: #define NMAGIC 0410 /* read-only text */
94: #define ZMAGIC 0413 /* demand load format */
95: #define QMAGIC 0314 /* demand load format. Header in text. */
96: unsigned int a_magic; /* magic number */
97:
98: unsigned int a_text; /* text segment size */
99: unsigned int a_data; /* initialized data size */
100: unsigned int a_bss; /* uninitialized data size */
101: unsigned int a_syms; /* symbol table size */
102: unsigned int a_entry; /* entry point */
103: unsigned int a_trsize; /* text relocation size */
104: unsigned int a_drsize; /* data relocation size */
105: };
106:
107: /*
108: * Address of ps_strings structure (in user space).
109: */
110: #define PS_STRINGS \
111: ((struct ps_strings *)(USRSTACK - sizeof(struct ps_strings)))
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