bsd/i386/exec.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*-
  23  * Copyright (c) 1992, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  *
  54  *      @(#)exec.h      8.1 (Berkeley) 6/11/93
  55  */
  56
  57 /* Size of a page in an object file. */
  58 #define __LDPGSZ        4096
  59
  60 /* Valid magic number check. */
  61 #define N_BADMAG(ex) \
  62         ((ex).a_magic != NMAGIC && (ex).a_magic != OMAGIC && \
  63             (ex).a_magic != ZMAGIC)
  64
  65 /* Address of the bottom of the text segment. */
  66 #define N_TXTADDR(X)    0
  67
  68 /* Address of the bottom of the data segment. */
  69 #define N_DATADDR(ex) \
  70         (N_TXTADDR(ex) + ((ex).a_magic == OMAGIC ? (ex).a_text \
  71         : __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
  72
  73 /* Text segment offset. */
  74 #define N_TXTOFF(ex) \
  75         ((ex).a_magic == ZMAGIC ? __LDPGSZ : sizeof(struct exec))
  76
  77 /* Data segment offset. */
  78 #define N_DATOFF(ex) \
  79         (N_TXTOFF(ex) + ((ex).a_magic != ZMAGIC ? (ex).a_text : \
  80         __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
  81
  82 /* Symbol table offset. */
  83 #define N_SYMOFF(ex) \
  84         (N_TXTOFF(ex) + (ex).a_text + (ex).a_data + (ex).a_trsize + \
  85             (ex).a_drsize)
  86
  87 /* String table offset. */
  88 #define N_STROFF(ex)    (N_SYMOFF(ex) + (ex).a_syms)
  89
  90 /* Description of the object file header (a.out format). */
  91 struct exec {
  92 #define OMAGIC  0407            /* old impure format */
  93 #define NMAGIC  0410            /* read-only text */
  94 #define ZMAGIC  0413            /* demand load format */
  95 #define QMAGIC  0314            /* demand load format. Header in text. */
  96         unsigned int    a_magic;        /* magic number */
  97
  98         unsigned int    a_text;         /* text segment size */
  99         unsigned int    a_data;         /* initialized data size */
 100         unsigned int    a_bss;          /* uninitialized data size */
 101         unsigned int    a_syms;         /* symbol table size */
 102         unsigned int    a_entry;        /* entry point */
 103         unsigned int    a_trsize;       /* text relocation size */
 104         unsigned int    a_drsize;       /* data relocation size */
 105 };
 106
 107 /*
 108  * Address of ps_strings structure (in user space).
 109  */
 110 #define PS_STRINGS \
 111         ((struct ps_strings *)(USRSTACK - sizeof(struct ps_strings)))