bsd/i386/exec.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*-
  26  * Copyright (c) 1992, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  *      @(#)exec.h      8.1 (Berkeley) 6/11/93
  58  */
  59
  60 #ifndef _BSD_I386_EXEC_H_
  61 #define _BSD_I386_EXEC_H_
  62
  63
  64 #include <sys/appleapiopts.h>
  65
  66 #ifdef __APPLE_API_OBSOLETE
  67 /* Size of a page in an object file. */
  68 #define __LDPGSZ        4096
  69
  70 /* Valid magic number check. */
  71 #define N_BADMAG(ex) \
  72         ((ex).a_magic != NMAGIC && (ex).a_magic != OMAGIC && \
  73             (ex).a_magic != ZMAGIC)
  74
  75 /* Address of the bottom of the text segment. */
  76 #define N_TXTADDR(X)    0
  77
  78 /* Address of the bottom of the data segment. */
  79 #define N_DATADDR(ex) \
  80         (N_TXTADDR(ex) + ((ex).a_magic == OMAGIC ? (ex).a_text \
  81         : __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
  82
  83 /* Text segment offset. */
  84 #define N_TXTOFF(ex) \
  85         ((ex).a_magic == ZMAGIC ? __LDPGSZ : sizeof(struct exec))
  86
  87 /* Data segment offset. */
  88 #define N_DATOFF(ex) \
  89         (N_TXTOFF(ex) + ((ex).a_magic != ZMAGIC ? (ex).a_text : \
  90         __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
  91
  92 /* Symbol table offset. */
  93 #define N_SYMOFF(ex) \
  94         (N_TXTOFF(ex) + (ex).a_text + (ex).a_data + (ex).a_trsize + \
  95             (ex).a_drsize)
  96
  97 /* String table offset. */
  98 #define N_STROFF(ex)    (N_SYMOFF(ex) + (ex).a_syms)
  99
 100 /* Description of the object file header (a.out format). */
 101 struct exec {
 102 #define OMAGIC  0407            /* old impure format */
 103 #define NMAGIC  0410            /* read-only text */
 104 #define ZMAGIC  0413            /* demand load format */
 105 #define QMAGIC  0314            /* demand load format. Header in text. */
 106         unsigned int    a_magic;        /* magic number */
 107
 108         unsigned int    a_text;         /* text segment size */
 109         unsigned int    a_data;         /* initialized data size */
 110         unsigned int    a_bss;          /* uninitialized data size */
 111         unsigned int    a_syms;         /* symbol table size */
 112         unsigned int    a_entry;        /* entry point */
 113         unsigned int    a_trsize;       /* text relocation size */
 114         unsigned int    a_drsize;       /* data relocation size */
 115 };
 116
 117 /*
 118  * Address of ps_strings structure (in user space).
 119  */
 120 #define PS_STRINGS \
 121         ((struct ps_strings *)(USRSTACK - sizeof(struct ps_strings)))
 122 #endif /* __APPLE_API_OBSOLETE */
 123
 124 #endif /* _BSD_I386_EXEC_H_ */