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a.out.h revision 1.5 
      1 /*-
      2  * Copyright (c) 1991 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *	@(#)a.out.h	5.6 (Berkeley) 4/30/91
     34  */
     35 
     36 #ifndef	_AOUT_H_
     37 #define	_AOUT_H_
     38 
     39 #include <sys/exec.h>
     40 
     41 #if defined(amiga)
     42 #define	__LDPGSZ	8192
     43 #endif
     44 #if defined(hp300) || defined(i386)
     45 #define	__LDPGSZ	4096
     46 #endif
     47 #if defined(tahoe) || defined(vax)
     48 #define	__LDPGSZ	1024
     49 #endif
     50 
     51 #define N_GETMAGIC(ex) \
     52     ( (((ex).a_midmag)&0xffff0000) ? (ntohl(((ex).a_midmag))&0xffff) : ((ex).a_midmag))
     53 #define N_GETMAGIC2(ex) \
     54     ( (((ex).a_midmag)&0xffff0000) ? (ntohl(((ex).a_midmag))&0xffff) : \
     55     (((ex).a_midmag) | 0x10000) )
     56 #define N_GETMID(ex) \
     57     ( (((ex).a_midmag)&0xffff0000) ? ((ntohl(((ex).a_midmag))>>16)&0x03ff) : MID_ZERO )
     58 #define N_GETFLAG(ex) \
     59     ( (((ex).a_midmag)&0xffff0000) ? ((ntohl(((ex).a_midmag))>>26)&0x3f) : 0 )
     60 #define N_SETMAGIC(ex,mag,mid,flag) \
     61     ( (ex).a_midmag = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \
     62     (((mag)&0xffff)) ) )
     63 
     64 #define N_ALIGN(ex,x) \
     65 	(N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \
     66 	 ((x) + __LDPGSZ - 1) & ~(__LDPGSZ - 1) : (x))
     67 
     68 /* Valid magic number check. */
     69 #define	N_BADMAG(ex) \
     70 	(N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \
     71 	    N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC)
     72 
     73 /* Address of the bottom of the text segment. */
     74 #define N_TXTADDR(ex)	(N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : __LDPGSZ)
     75 
     76 /* Address of the bottom of the data segment. */
     77 #define N_DATADDR(ex) \
     78 	N_ALIGN(ex, N_TXTADDR(ex) + (ex).a_text)
     79 
     80 /* Text segment offset. */
     81 #define	N_TXTOFF(ex) \
     82 	( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
     83 	0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? __LDPGSZ : sizeof(struct exec)) )
     84 
     85 /* Data segment offset. */
     86 #define	N_DATOFF(ex) \
     87 	N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
     88 
     89 /* Relocation table offset. */
     90 #define N_RELOFF(ex) \
     91 	N_ALIGN(ex, N_DATOFF(ex) + (ex).a_data)
     92 
     93 /* Symbol table offset. */
     94 #define N_SYMOFF(ex) \
     95 	(N_RELOFF(ex) + (ex).a_trsize + (ex).a_drsize)
     96 
     97 /* String table offset. */
     98 #define	N_STROFF(ex) 	(N_SYMOFF(ex) + (ex).a_syms)
     99 
    100 /* Relocation format. */
    101 struct relocation_info {
    102 	int r_address;			/* offset in text or data segment */
    103 	unsigned int r_symbolnum : 24,	/* ordinal number of add symbol */
    104 			 r_pcrel :  1,	/* 1 if value should be pc-relative */
    105 			r_length :  2,	/* log base 2 of value's width */
    106 			r_extern :  1,	/* 1 if need to add symbol to value */
    107 				 :  4;	/* reserved */
    108 };
    109 
    110 #define _AOUT_INCLUDE_
    111 #include <nlist.h>
    112 
    113 #endif /* !_AOUT_H_ */
    114