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