kernel: Adjust some comments to the unionfs removal.
[dragonfly.git] / include / nlist.h
CommitLineData
984263bc
MD
1/*-
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)nlist.h 8.2 (Berkeley) 1/21/94
39 *
40 * $FreeBSD: src/include/nlist.h,v 1.7 1999/08/27 23:44:51 peter Exp $
ed3b1cc3 41 * $DragonFly: src/include/nlist.h,v 1.4 2004/11/18 12:38:43 joerg Exp $
984263bc
MD
42 */
43
44#ifndef _NLIST_H_
45#define _NLIST_H_
46
47/*
48 * Symbol table entries in a.out files.
49 */
50
51/*
52 * Layout of each symbol. The "#ifdef _AOUT_INCLUDE_" is so that
53 * programs including nlist.h can initialize nlist structures
54 * statically.
55 */
56struct nlist {
57#ifdef _AOUT_INCLUDE_
58 union {
ed3b1cc3
JS
59 const char *n_name; /* symbol name (in memory) */
60 long n_strx; /* file string table offset (on disk) */
984263bc
MD
61 } n_un;
62#else
ed3b1cc3 63 const char *n_name; /* symbol name (in memory) */
984263bc
MD
64#endif
65 unsigned char n_type; /* type defines */
66 char n_other; /* ".type" and binding information */
67 short n_desc; /* used by stab entries */
68 unsigned long n_value; /* address/value of the symbol */
69};
70
71#define n_hash n_desc /* used internally by ld(1); XXX */
72
73/*
74 * Defines for n_type.
75 */
76#define N_UNDF 0x00 /* undefined */
77#define N_ABS 0x02 /* absolute address */
78#define N_TEXT 0x04 /* text segment */
79#define N_DATA 0x06 /* data segment */
80#define N_BSS 0x08 /* bss segment */
81#define N_INDR 0x0a /* alias definition */
82#define N_SIZE 0x0c /* pseudo type, defines a symbol's size */
83#define N_COMM 0x12 /* common reference */
84/* GNU extensions */
85#define N_SETA 0x14 /* Absolute set element symbol */
86#define N_SETT 0x16 /* Text set element symbol */
87#define N_SETD 0x18 /* Data set element symbol */
88#define N_SETB 0x1a /* Bss set element symbol */
89#define N_SETV 0x1c /* Pointer to set vector in data area. */
90/* end GNU extensions */
91#define N_FN 0x1e /* file name (N_EXT on) */
92#define N_WARN 0x1e /* warning message (N_EXT off) */
93
94#define N_EXT 0x01 /* external (global) bit, OR'ed in */
95#define N_TYPE 0x1e /* mask for all the type bits */
96#define N_STAB 0xe0 /* mask for debugger symbols -- stab(5) */
97
98/*
99 * Defines for n_other. It contains the ".type" (AUX) field in the least
100 * significant 4 bits, and the binding (for weak symbols) in the most
101 * significant 4 bits.
102 */
103#define N_AUX(p) ((p)->n_other & 0xf)
104#define N_BIND(p) (((unsigned int)(p)->n_other >> 4) & 0xf)
105#define N_OTHER(r, v) (((unsigned int)(r) << 4) | ((v) & 0xf))
106
107#define AUX_OBJECT 1 /* data object */
108#define AUX_FUNC 2 /* function */
109
110/*#define BIND_LOCAL 0 not used */
111/*#define BIND_GLOBAL 1 not used */
112#define BIND_WEAK 2 /* weak binding */
113
114#define N_FORMAT "%08x" /* namelist value format; XXX */
115
116#include <sys/cdefs.h>
117
118__BEGIN_DECLS
7c4af8e1 119int nlist (const char *, struct nlist *);
984263bc
MD
120__END_DECLS
121
122#endif /* !_NLIST_H_ */