Initial import from FreeBSD RELENG_4:
[dragonfly.git] / include / nlist.h
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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 $
41 */
42
43#ifndef _NLIST_H_
44#define _NLIST_H_
45
46/*
47 * Symbol table entries in a.out files.
48 */
49
50/*
51 * Layout of each symbol. The "#ifdef _AOUT_INCLUDE_" is so that
52 * programs including nlist.h can initialize nlist structures
53 * statically.
54 */
55struct nlist {
56#ifdef _AOUT_INCLUDE_
57 union {
58 char *n_name; /* symbol name (in memory) */
59 long n_strx; /* file string table offset (on disk) */
60 } n_un;
61#else
62 char *n_name; /* symbol name (in memory) */
63#endif
64 unsigned char n_type; /* type defines */
65 char n_other; /* ".type" and binding information */
66 short n_desc; /* used by stab entries */
67 unsigned long n_value; /* address/value of the symbol */
68};
69
70#define n_hash n_desc /* used internally by ld(1); XXX */
71
72/*
73 * Defines for n_type.
74 */
75#define N_UNDF 0x00 /* undefined */
76#define N_ABS 0x02 /* absolute address */
77#define N_TEXT 0x04 /* text segment */
78#define N_DATA 0x06 /* data segment */
79#define N_BSS 0x08 /* bss segment */
80#define N_INDR 0x0a /* alias definition */
81#define N_SIZE 0x0c /* pseudo type, defines a symbol's size */
82#define N_COMM 0x12 /* common reference */
83/* GNU extensions */
84#define N_SETA 0x14 /* Absolute set element symbol */
85#define N_SETT 0x16 /* Text set element symbol */
86#define N_SETD 0x18 /* Data set element symbol */
87#define N_SETB 0x1a /* Bss set element symbol */
88#define N_SETV 0x1c /* Pointer to set vector in data area. */
89/* end GNU extensions */
90#define N_FN 0x1e /* file name (N_EXT on) */
91#define N_WARN 0x1e /* warning message (N_EXT off) */
92
93#define N_EXT 0x01 /* external (global) bit, OR'ed in */
94#define N_TYPE 0x1e /* mask for all the type bits */
95#define N_STAB 0xe0 /* mask for debugger symbols -- stab(5) */
96
97/*
98 * Defines for n_other. It contains the ".type" (AUX) field in the least
99 * significant 4 bits, and the binding (for weak symbols) in the most
100 * significant 4 bits.
101 */
102#define N_AUX(p) ((p)->n_other & 0xf)
103#define N_BIND(p) (((unsigned int)(p)->n_other >> 4) & 0xf)
104#define N_OTHER(r, v) (((unsigned int)(r) << 4) | ((v) & 0xf))
105
106#define AUX_OBJECT 1 /* data object */
107#define AUX_FUNC 2 /* function */
108
109/*#define BIND_LOCAL 0 not used */
110/*#define BIND_GLOBAL 1 not used */
111#define BIND_WEAK 2 /* weak binding */
112
113#define N_FORMAT "%08x" /* namelist value format; XXX */
114
115#include <sys/cdefs.h>
116
117__BEGIN_DECLS
118int nlist __P((const char *, struct nlist *));
119__END_DECLS
120
121#endif /* !_NLIST_H_ */