bsd/ppc/exec.h

   1 /*
   2  * Copyright (c) 2000-2002 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) 1994, The University of Utah and
  32  * the Center for Software Science at the University of Utah (CSS).
  33  * All rights reserved.
  34  *
  35  * Permission to use, copy, modify and distribute this software and its
  36  * documentation is hereby granted, provided that both the copyright
  37  * notice and this permission notice appear in all copies of the
  38  * software, derivative works or modified versions, and any portions
  39  * thereof, and that both notices appear in supporting documentation.
  40  *
  41  * THE UNIVERSITY OF UTAH AND CSS ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  42  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSS DISCLAIM ANY LIABILITY OF
  43  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  44  *
  45  * CSS requests users of this software to return to css-dist@cs.utah.edu any
  46  * improvements that they make and grant CSS redistribution rights.
  47  *
  48  */
  49
  50 #ifndef _BSD_PPC_EXEC_H_
  51 #define _BSD_PPC_EXEC_H_
  52
  53
  54 #include <sys/appleapiopts.h>
  55
  56 #ifdef BSD_KERNEL_PRIVATE
  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 #endif /* BSD_KERNEL_PRIVATE */
 108
 109 #endif /* _BSD_PPC_EXEC_H_ */
 110