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Annotation of XNU/bsd/ppc/exec.h, revision 1.1.1.1

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

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