bsd/i386/exec.h

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