nlist.h revision 93032
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: head/include/nlist.h 93032 2002-03-23 17:24:55Z imp $ 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(const char *, struct nlist *); 119__END_DECLS 120 121#endif /* !_NLIST_H_ */ 122