exec.h revision 1977 
1/*-
2 * Copyright (c) 1992, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)exec.h	8.1 (Berkeley) 6/11/93
34 * $Id: exec.h,v 1.3 1994/08/02 07:38:45 davidg Exp $
35 */
36
37#ifndef	_EXEC_H_
38#define	_EXEC_H_
39
40#if defined(hp300) || defined(i386)
41#define	__LDPGSZ	4096
42#endif
43#if defined(tahoe) || defined(vax)
44#define	__LDPGSZ	1024
45#endif
46
47#define N_GETMAGIC(ex) \
48	( (ex).a_midmag & 0xffff )
49#define N_GETMID(ex) \
50	( (N_GETMAGIC_NET(ex) == ZMAGIC) ? N_GETMID_NET(ex) : \
51	((ex).a_midmag >> 16) & 0x03ff )
52#define N_GETFLAG(ex) \
53	( (N_GETMAGIC_NET(ex) == ZMAGIC) ? N_GETFLAG_NET(ex) : \
54	((ex).a_midmag >> 26) & 0x3f )
55#define N_SETMAGIC(ex,mag,mid,flag) \
56	( (ex).a_midmag = (((flag) & 0x3f) <<26) | (((mid) & 0x03ff) << 16) | \
57	((mag) & 0xffff) )
58
59#define N_GETMAGIC_NET(ex) \
60	(ntohl((ex).a_midmag) & 0xffff)
61#define N_GETMID_NET(ex) \
62	((ntohl((ex).a_midmag) >> 16) & 0x03ff)
63#define N_GETFLAG_NET(ex) \
64	((ntohl((ex).a_midmag) >> 26) & 0x3f)
65#define N_SETMAGIC_NET(ex,mag,mid,flag) \
66	( (ex).a_midmag = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \
67	(((mag)&0xffff)) ) )
68
69#define N_ALIGN(ex,x) \
70	(N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC || \
71	 N_GETMAGIC_NET(ex) == ZMAGIC || N_GETMAGIC_NET(ex) == QMAGIC ? \
72	 ((x) + __LDPGSZ - 1) & ~(__LDPGSZ - 1) : (x))
73
74/* Valid magic number check. */
75#define	N_BADMAG(ex) \
76	(N_GETMAGIC(ex) != OMAGIC && N_GETMAGIC(ex) != NMAGIC && \
77	 N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC && \
78	 N_GETMAGIC_NET(ex) != OMAGIC && N_GETMAGIC_NET(ex) != NMAGIC && \
79	 N_GETMAGIC_NET(ex) != ZMAGIC && N_GETMAGIC_NET(ex) != QMAGIC)
80
81
82/* Address of the bottom of the text segment. */
83#define N_TXTADDR(ex) \
84	((N_GETMAGIC(ex) == OMAGIC || N_GETMAGIC(ex) == NMAGIC || \
85	N_GETMAGIC(ex) == ZMAGIC) ? 0 : __LDPGSZ)
86
87/* Address of the bottom of the data segment. */
88#define N_DATADDR(ex) \
89	N_ALIGN(ex, N_TXTADDR(ex) + (ex).a_text)
90
91/* Text segment offset. */
92#define	N_TXTOFF(ex) \
93	(N_GETMAGIC(ex) == ZMAGIC ? __LDPGSZ : (N_GETMAGIC(ex) == QMAGIC || \
94	N_GETMAGIC_NET(ex) == ZMAGIC) ? 0 : sizeof(struct exec))
95
96/* Data segment offset. */
97#define	N_DATOFF(ex) \
98	N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
99
100/* Relocation table offset. */
101#define N_RELOFF(ex) \
102	N_ALIGN(ex, N_DATOFF(ex) + (ex).a_data)
103
104/* Symbol table offset. */
105#define N_SYMOFF(ex) \
106	(N_RELOFF(ex) + (ex).a_trsize + (ex).a_drsize)
107
108/* String table offset. */
109#define	N_STROFF(ex) 	(N_SYMOFF(ex) + (ex).a_syms)
110
111/*
112 * Header prepended to each a.out file.
113 * only manipulate the a_midmag field via the
114 * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros in a.out.h
115 */
116
117struct exec {
118     unsigned long  a_midmag;   /* htonl(flags<<26 | mid<<16 | magic) */
119     unsigned long	a_text;		/* text segment size */
120     unsigned long	a_data;		/* initialized data size */
121     unsigned long	a_bss;		/* uninitialized data size */
122     unsigned long	a_syms;		/* symbol table size */
123     unsigned long	a_entry;	/* entry point */
124     unsigned long	a_trsize;	/* text relocation size */
125     unsigned long	a_drsize;	/* data relocation size */
126};
127#define a_magic a_midmag /* XXX Hack to work with current kern_execve.c */
128
129/* a_magic */
130#define	OMAGIC		0407	/* old impure format */
131#define	NMAGIC		0410	/* read-only text */
132#define	ZMAGIC		0413	/* demand load format */
133#define QMAGIC          0314    /* "compact" demand load format */
134
135/* a_mid */
136#define	MID_ZERO	0	/* unknown - implementation dependent */
137#define	MID_SUN010	1	/* sun 68010/68020 binary */
138#define	MID_SUN020	2	/* sun 68020-only binary */
139#define MID_I386	134	/* i386 BSD binary */
140#define	MID_HP200	200	/* hp200 (68010) BSD binary */
141#define	MID_HP300	300	/* hp300 (68020+68881) BSD binary */
142#define	MID_HPUX	0x20C	/* hp200/300 HP-UX binary */
143#define	MID_HPUX800     0x20B   /* hp800 HP-UX binary */
144
145/*
146 * a_flags
147 */
148#define EX_DYNAMIC   0x20  /* a.out contains run-time link-edit info */
149
150#endif /* !_EXEC_H_ */
151