bsd/ppc/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) 1994, The University of Utah and
  25  * the Center for Software Science at the University of Utah (CSS).
  26  * All rights reserved.
  27  *
  28  * Permission to use, copy, modify and distribute this software and its
  29  * documentation is hereby granted, provided that both the copyright
  30  * notice and this permission notice appear in all copies of the
  31  * software, derivative works or modified versions, and any portions
  32  * thereof, and that both notices appear in supporting documentation.
  33  *
  34  * THE UNIVERSITY OF UTAH AND CSS ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  35  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSS DISCLAIM ANY LIABILITY OF
  36  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  37  *
  38  * CSS requests users of this software to return to css-dist@cs.utah.edu any
  39  * improvements that they make and grant CSS redistribution rights.
  40  *
  41  */
  42
  43 #ifndef _BSD_PPC_EXEC_H_
  44 #define _BSD_PPC_EXEC_H_
  45
  46
  47 #include <sys/appleapiopts.h>
  48
  49 #ifdef BSD_KERNEL_PRIVATE
  50 /* Size of a page in an object file. */
  51 #define __LDPGSZ        4096
  52
  53 /* Valid magic number check. */
  54 #define N_BADMAG(ex) \
  55         ((ex).a_magic != NMAGIC && (ex).a_magic != OMAGIC && \
  56             (ex).a_magic != ZMAGIC)
  57
  58 /* Address of the bottom of the text segment. */
  59 #define N_TXTADDR(X)    0
  60
  61 /* Address of the bottom of the data segment. */
  62 #define N_DATADDR(ex) \
  63         (N_TXTADDR(ex) + ((ex).a_magic == OMAGIC ? (ex).a_text \
  64         : __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
  65
  66 /* Text segment offset. */
  67 #define N_TXTOFF(ex) \
  68         ((ex).a_magic == ZMAGIC ? __LDPGSZ : sizeof(struct exec))
  69
  70 /* Data segment offset. */
  71 #define N_DATOFF(ex) \
  72         (N_TXTOFF(ex) + ((ex).a_magic != ZMAGIC ? (ex).a_text : \
  73         __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
  74
  75 /* Symbol table offset. */
  76 #define N_SYMOFF(ex) \
  77         (N_TXTOFF(ex) + (ex).a_text + (ex).a_data + (ex).a_trsize + \
  78             (ex).a_drsize)
  79
  80 /* String table offset. */
  81 #define N_STROFF(ex)    (N_SYMOFF(ex) + (ex).a_syms)
  82
  83 /* Description of the object file header (a.out format). */
  84 struct exec {
  85 #define OMAGIC  0407            /* old impure format */
  86 #define NMAGIC  0410            /* read-only text */
  87 #define ZMAGIC  0413            /* demand load format */
  88 #define QMAGIC  0314            /* demand load format. Header in text. */
  89         unsigned int    a_magic;        /* magic number */
  90
  91         unsigned int    a_text;         /* text segment size */
  92         unsigned int    a_data;         /* initialized data size */
  93         unsigned int    a_bss;          /* uninitialized data size */
  94         unsigned int    a_syms;         /* symbol table size */
  95         unsigned int    a_entry;        /* entry point */
  96         unsigned int    a_trsize;       /* text relocation size */
  97         unsigned int    a_drsize;       /* data relocation size */
  98 };
  99
 100 #endif /* BSD_KERNEL_PRIVATE */
 101
 102 #endif /* _BSD_PPC_EXEC_H_ */
 103