include/nlist.h

   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  * $DragonFly: src/include/nlist.h,v 1.4 2004/11/18 12:38:43 joerg Exp $
  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  */
  56 struct nlist {
  57 #ifdef _AOUT_INCLUDE_
  58         union {
  59                 const char *n_name;     /* symbol name (in memory) */
  60                 long n_strx;            /* file string table offset (on disk) */
  61         } n_un;
  62 #else
  63         const char *n_name;     /* symbol name (in memory) */
  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
 119 int nlist (const char *, struct nlist *);
 120 __END_DECLS
 121
 122 #endif /* !_NLIST_H_ */