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 * @(#)nlist.h 8.2 (Berkeley) 1/21/94 37 * 38 * $FreeBSD$ 39 */ 40 41 #ifndef _SYS_NLIST_AOUT_H_ 42 #define _SYS_NLIST_AOUT_H_ 43 44 /* 45 * Symbol table entries in a.out files. 46 */ 47 48 /* 49 * Layout of each symbol. The "#ifdef _AOUT_INCLUDE_" is so that 50 * programs including nlist.h can initialize nlist structures 51 * statically. 52 */ 53 struct nlist { 54 #ifdef _AOUT_INCLUDE_ 55 union { 56 const char *n_name; /* symbol name (in memory) */ 57 long n_strx; /* file string table offset (on disk) */ 58 } n_un; 59 #else 60 const char *n_name; /* symbol name (in memory) */ 61 #endif 62 unsigned char n_type; /* type defines */ 63 char n_other; /* ".type" and binding information */ 64 short n_desc; /* used by stab entries */ 65 unsigned long n_value; /* address/value of the symbol */ 66 }; 67 68 #define n_hash n_desc /* used internally by ld(1); XXX */ 69 70 /* 71 * Defines for n_type. 72 */ 73 #define N_UNDF 0x00 /* undefined */ 74 #define N_ABS 0x02 /* absolute address */ 75 #define N_TEXT 0x04 /* text segment */ 76 #define N_DATA 0x06 /* data segment */ 77 #define N_BSS 0x08 /* bss segment */ 78 #define N_INDR 0x0a /* alias definition */ 79 #define N_SIZE 0x0c /* pseudo type, defines a symbol's size */ 80 #define N_COMM 0x12 /* common reference */ 81 /* GNU extensions */ 82 #define N_SETA 0x14 /* Absolute set element symbol */ 83 #define N_SETT 0x16 /* Text set element symbol */ 84 #define N_SETD 0x18 /* Data set element symbol */ 85 #define N_SETB 0x1a /* Bss set element symbol */ 86 #define N_SETV 0x1c /* Pointer to set vector in data area. */ 87 /* end GNU extensions */ 88 #define N_FN 0x1e /* file name (N_EXT on) */ 89 #define N_WARN 0x1e /* warning message (N_EXT off) */ 90 91 #define N_EXT 0x01 /* external (global) bit, OR'ed in */ 92 #define N_TYPE 0x1e /* mask for all the type bits */ 93 #define N_STAB 0xe0 /* mask for debugger symbols -- stab(5) */ 94 95 /* 96 * Defines for n_other. It contains the ".type" (AUX) field in the least 97 * significant 4 bits, and the binding (for weak symbols) in the most 98 * significant 4 bits. 99 */ 100 #define N_AUX(p) ((p)->n_other & 0xf) 101 #define N_BIND(p) (((unsigned int)(p)->n_other >> 4) & 0xf) 102 #define N_OTHER(r, v) (((unsigned int)(r) << 4) | ((v) & 0xf)) 103 104 #define AUX_OBJECT 1 /* data object */ 105 #define AUX_FUNC 2 /* function */ 106 107 /*#define BIND_LOCAL 0 not used */ 108 /*#define BIND_GLOBAL 1 not used */ 109 #define BIND_WEAK 2 /* weak binding */ 110 111 #define N_FORMAT "%08x" /* namelist value format; XXX */ 112 113 #endif /* !_SYS_NLIST_AOUT_H_ */ 114