bsd/ppc/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) 1994, The University of Utah and
  30  * the Center for Software Science at the University of Utah (CSS).
  31  * All rights reserved.
  32  *
  33  * Permission to use, copy, modify and distribute this software and its
  34  * documentation is hereby granted, provided that both the copyright
  35  * notice and this permission notice appear in all copies of the
  36  * software, derivative works or modified versions, and any portions
  37  * thereof, and that both notices appear in supporting documentation.
  38  *
  39  * THE UNIVERSITY OF UTAH AND CSS ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  40  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSS DISCLAIM ANY LIABILITY OF
  41  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  42  *
  43  * CSS requests users of this software to return to css-dist@cs.utah.edu any
  44  * improvements that they make and grant CSS redistribution rights.
  45  *
  46  */
  47
  48 #ifndef _BSD_PPC_EXEC_H_
  49 #define _BSD_PPC_EXEC_H_
  50
  51
  52 #include <sys/appleapiopts.h>
  53
  54 #ifdef BSD_KERNEL_PRIVATE
  55 /* Size of a page in an object file. */
  56 #define __LDPGSZ        4096
  57
  58 /* Valid magic number check. */
  59 #define N_BADMAG(ex) \
  60         ((ex).a_magic != NMAGIC && (ex).a_magic != OMAGIC && \
  61             (ex).a_magic != ZMAGIC)
  62
  63 /* Address of the bottom of the text segment. */
  64 #define N_TXTADDR(X)    0
  65
  66 /* Address of the bottom of the data segment. */
  67 #define N_DATADDR(ex) \
  68         (N_TXTADDR(ex) + ((ex).a_magic == OMAGIC ? (ex).a_text \
  69         : __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
  70
  71 /* Text segment offset. */
  72 #define N_TXTOFF(ex) \
  73         ((ex).a_magic == ZMAGIC ? __LDPGSZ : sizeof(struct exec))
  74
  75 /* Data segment offset. */
  76 #define N_DATOFF(ex) \
  77         (N_TXTOFF(ex) + ((ex).a_magic != ZMAGIC ? (ex).a_text : \
  78         __LDPGSZ + ((ex).a_text - 1 & ~(__LDPGSZ - 1))))
  79
  80 /* Symbol table offset. */
  81 #define N_SYMOFF(ex) \
  82         (N_TXTOFF(ex) + (ex).a_text + (ex).a_data + (ex).a_trsize + \
  83             (ex).a_drsize)
  84
  85 /* String table offset. */
  86 #define N_STROFF(ex)    (N_SYMOFF(ex) + (ex).a_syms)
  87
  88 /* Description of the object file header (a.out format). */
  89 struct exec {
  90 #define OMAGIC  0407            /* old impure format */
  91 #define NMAGIC  0410            /* read-only text */
  92 #define ZMAGIC  0413            /* demand load format */
  93 #define QMAGIC  0314            /* demand load format. Header in text. */
  94         unsigned int    a_magic;        /* magic number */
  95
  96         unsigned int    a_text;         /* text segment size */
  97         unsigned int    a_data;         /* initialized data size */
  98         unsigned int    a_bss;          /* uninitialized data size */
  99         unsigned int    a_syms;         /* symbol table size */
 100         unsigned int    a_entry;        /* entry point */
 101         unsigned int    a_trsize;       /* text relocation size */
 102         unsigned int    a_drsize;       /* data relocation size */
 103 };
 104
 105 #endif /* BSD_KERNEL_PRIVATE */
 106
 107 #endif /* _BSD_PPC_EXEC_H_ */
 108