bsd/i386/exec.h

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