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a.out.h revision 1.13 
      1 /*-
      2  * Copyright (c) 1993 Theo de Raadt
      3  * Copyright (c) 1991 The Regents of the University of California.
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by the University of
     17  *	California, Berkeley and its contributors.
     18  * 4. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	from: @(#)a.out.h	5.6 (Berkeley) 4/30/91
     35  *	$Id: a.out.h,v 1.13 1994/04/07 06:34:03 deraadt Exp $
     36  */
     37 
     38 #ifndef	_AOUT_H_
     39 #define	_AOUT_H_
     40 
     41 #include <sys/exec.h>
     42 #include <machine/exec.h>
     43 
     44 
     45 #ifndef N_PAGSIZ
     46 #define	N_PAGSIZ(ex)	(__LDPGSZ)
     47 #endif
     48 
     49 /*
     50  * The a.out structure's a_midmag field is a network-byteorder encoding
     51  * of this int
     52  *	FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM
     53  * Where `F' is 6 bits of flag like EX_DYNAMIC,
     54  *       `m' is 10 bits of machine-id like MID_I386, and
     55  *       `M' is 16 bits worth of magic number, ie. ZMAGIC.
     56  * The macros below will set/get the needed fields.
     57  */
     58 #define	N_GETMAGIC(ex) \
     59     ( (((ex).a_midmag)&0xffff0000) ? (ntohl(((ex).a_midmag))&0xffff) : ((ex).a_midmag))
     60 #define	N_GETMAGIC2(ex) \
     61     ( (((ex).a_midmag)&0xffff0000) ? (ntohl(((ex).a_midmag))&0xffff) : \
     62     (((ex).a_midmag) | 0x10000) )
     63 #define	N_GETMID(ex) \
     64     ( (((ex).a_midmag)&0xffff0000) ? ((ntohl(((ex).a_midmag))>>16)&0x03ff) : MID_ZERO )
     65 #define	N_GETFLAG(ex) \
     66     ( (((ex).a_midmag)&0xffff0000) ? ((ntohl(((ex).a_midmag))>>26)&0x3f) : 0 )
     67 #define	N_SETMAGIC(ex,mag,mid,flag) \
     68     ( (ex).a_midmag = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \
     69     (((mag)&0xffff)) ) )
     70 
     71 #define	N_ALIGN(ex,x) \
     72 	(N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \
     73 	((x) + __LDPGSZ - 1) & ~(__LDPGSZ - 1) : (x))
     74 
     75 /* Valid magic number check. */
     76 #define	N_BADMAG(ex) \
     77 	(N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \
     78 	N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC)
     79 
     80 /* Address of the bottom of the text segment. */
     81 #define	N_TXTADDR(ex)	(N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : __LDPGSZ)
     82 
     83 /* Address of the bottom of the data segment. */
     84 #define	N_DATADDR(ex) \
     85 	(N_GETMAGIC(ex) == OMAGIC ? N_TXTADDR(ex) + (ex).a_text : \
     86 	(N_TXTADDR(ex) + (ex).a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1))
     87 
     88 /* Address of the bottom of the bss segment. */
     89 #define	N_BSSADDR(ex) \
     90 	(N_DATADDR(ex) + (ex).a_data)
     91 
     92 /* Text segment offset. */
     93 #define	N_TXTOFF(ex) \
     94 	( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
     95 	0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? __LDPGSZ : \
     96 	sizeof(struct exec)) )
     97 
     98 /* Data segment offset. */
     99 #define	N_DATOFF(ex) \
    100 	N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
    101 
    102 /* Text relocation table offset. */
    103 #define	N_TRELOFF(ex) \
    104 	(N_DATOFF(ex) + (ex).a_data)
    105 
    106 /* Data relocation table offset. */
    107 #define	N_DRELOFF(ex) \
    108 	(N_TRELOFF(ex) + (ex).a_trsize)
    109 
    110 /* Symbol table offset. */
    111 #define	N_SYMOFF(ex) \
    112 	(N_DRELOFF(ex) + (ex).a_drsize)
    113 
    114 /* String table offset. */
    115 #define	N_STROFF(ex) \
    116 	(N_SYMOFF(ex) + (ex).a_syms)
    117 
    118 #define	_AOUT_INCLUDE_
    119 #include <nlist.h>
    120 
    121 #endif /* !_AOUT_H_ */
    122