bsd/i386/exec.h

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*-
  31  * Copyright (c) 1992, 1993
  32  *      The Regents of the University of California.  All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. All advertising materials mentioning features or use of this software
  43  *    must display the following acknowledgement:
  44  *      This product includes software developed by the University of
  45  *      California, Berkeley and its contributors.
  46  * 4. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  *      @(#)exec.h      8.1 (Berkeley) 6/11/93
  63  */
  64
  65 #ifndef _BSD_I386_EXEC_H_
  66 #define _BSD_I386_EXEC_H_
  67
  68
  69 #ifdef BSD_KERNEL_PRIVATE
  70 /* Size of a page in an object file. */
  71 #define __LDPGSZ        4096
  72
  73 /* Valid magic number check. */
  74 #define N_BADMAG(ex) \
  75         ((ex).a_magic != NMAGIC && (ex).a_magic != OMAGIC && \
  76             (ex).a_magic != ZMAGIC)
  77
  78 /* Address of the bottom of the text segment. */
  79 #define N_TXTADDR(X)    0
  80
  81 /* Address of the bottom of the data segment. */
  82 #define N_DATADDR(ex) \
  83         (N_TXTADDR(ex) + ((ex).a_magic == OMAGIC ? (ex).a_text \
  84         : __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
  85
  86 /* Text segment offset. */
  87 #define N_TXTOFF(ex) \
  88         ((ex).a_magic == ZMAGIC ? __LDPGSZ : sizeof(struct exec))
  89
  90 /* Data segment offset. */
  91 #define N_DATOFF(ex) \
  92         (N_TXTOFF(ex) + ((ex).a_magic != ZMAGIC ? (ex).a_text : \
  93         __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
  94
  95 /* Symbol table offset. */
  96 #define N_SYMOFF(ex) \
  97         (N_TXTOFF(ex) + (ex).a_text + (ex).a_data + (ex).a_trsize + \
  98             (ex).a_drsize)
  99
 100 /* String table offset. */
 101 #define N_STROFF(ex)    (N_SYMOFF(ex) + (ex).a_syms)
 102
 103 /* Description of the object file header (a.out format). */
 104 struct exec {
 105 #define OMAGIC  0407            /* old impure format */
 106 #define NMAGIC  0410            /* read-only text */
 107 #define ZMAGIC  0413            /* demand load format */
 108 #define QMAGIC  0314            /* demand load format. Header in text. */
 109         unsigned int    a_magic;        /* magic number */
 110
 111         unsigned int    a_text;         /* text segment size */
 112         unsigned int    a_data;         /* initialized data size */
 113         unsigned int    a_bss;          /* uninitialized data size */
 114         unsigned int    a_syms;         /* symbol table size */
 115         unsigned int    a_entry;        /* entry point */
 116         unsigned int    a_trsize;       /* text relocation size */
 117         unsigned int    a_drsize;       /* data relocation size */
 118 };
 119
 120 #endif /* BSD_KERNEL_PRIVATE */
 121
 122 #endif /* _BSD_I386_EXEC_H_ */