1 /*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. 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 * @(#)exec.h 8.1 (Berkeley) 6/11/93 34 * $Id$ 35 */ 36 37 #ifndef _EXEC_H_ 38 #define _EXEC_H_ 39 40 #define __LDPGSZ 4096 41 42 /* Valid magic number check. */ 43 #define N_BADMAG(ex) \ 44 (N_GETMAGIC(ex) != OMAGIC && N_GETMAGIC(ex) != NMAGIC && \ 45 N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC && \ 46 N_GETMAGIC_NET(ex) != OMAGIC && N_GETMAGIC_NET(ex) != NMAGIC && \ 47 N_GETMAGIC_NET(ex) != ZMAGIC && N_GETMAGIC_NET(ex) != QMAGIC) 48 49 #define N_ALIGN(ex,x) \ 50 (N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC || \ 51 N_GETMAGIC_NET(ex) == ZMAGIC || N_GETMAGIC_NET(ex) == QMAGIC ? \ 52 ((x) + __LDPGSZ - 1) & ~(__LDPGSZ - 1) : (x)) 53 54 /* Address of the bottom of the text segment. */ 55 #define N_TXTADDR(ex) \ 56 ((N_GETMAGIC(ex) == OMAGIC || N_GETMAGIC(ex) == NMAGIC || \ 57 N_GETMAGIC(ex) == ZMAGIC) ? 0 : __LDPGSZ) 58 59 /* Address of the bottom of the data segment. */ 60 #define N_DATADDR(ex) \ 61 N_ALIGN(ex, N_TXTADDR(ex) + (ex).a_text) 62 63 #define N_GETMAGIC(ex) \ 64 ( (ex).a_midmag & 0xffff ) 65 #define N_GETMID(ex) \ 66 ( (N_GETMAGIC_NET(ex) == ZMAGIC) ? N_GETMID_NET(ex) : \ 67 ((ex).a_midmag >> 16) & 0x03ff ) 68 #define N_GETFLAG(ex) \ 69 ( (N_GETMAGIC_NET(ex) == ZMAGIC) ? N_GETFLAG_NET(ex) : \ 70 ((ex).a_midmag >> 26) & 0x3f ) 71 #define N_SETMAGIC(ex,mag,mid,flag) \ 72 ( (ex).a_midmag = (((flag) & 0x3f) <<26) | (((mid) & 0x03ff) << 16) | \ 73 ((mag) & 0xffff) ) 74 75 #define N_GETMAGIC_NET(ex) \ 76 (ntohl((ex).a_midmag) & 0xffff) 77 #define N_GETMID_NET(ex) \ 78 ((ntohl((ex).a_midmag) >> 16) & 0x03ff) 79 #define N_GETFLAG_NET(ex) \ 80 ((ntohl((ex).a_midmag) >> 26) & 0x3f) 81 #define N_SETMAGIC_NET(ex,mag,mid,flag) \ 82 ( (ex).a_midmag = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \ 83 (((mag)&0xffff)) ) ) 84 85 /* Text segment offset. */ 86 #define N_TXTOFF(ex) \ 87 (N_GETMAGIC(ex) == ZMAGIC ? __LDPGSZ : (N_GETMAGIC(ex) == QMAGIC || \ 88 N_GETMAGIC_NET(ex) == ZMAGIC) ? 0 : sizeof(struct exec)) 89 90 /* Data segment offset. */ 91 #define N_DATOFF(ex) \ 92 N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text) 93 94 /* Relocation table offset. */ 95 #define N_RELOFF(ex) \ 96 N_ALIGN(ex, N_DATOFF(ex) + (ex).a_data) 97 98 /* Symbol table offset. */ 99 #define N_SYMOFF(ex) \ 100 (N_RELOFF(ex) + (ex).a_trsize + (ex).a_drsize) 101 102 /* String table offset. */ 103 #define N_STROFF(ex) (N_SYMOFF(ex) + (ex).a_syms) 104 105 /* 106 * Header prepended to each a.out file. 107 * only manipulate the a_midmag field via the 108 * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros in a.out.h 109 */ 110 111 struct exec { 112 unsigned long a_midmag; /* htonl(flags<<26 | mid<<16 | magic) */ 113 unsigned long a_text; /* text segment size */ 114 unsigned long a_data; /* initialized data size */ 115 unsigned long a_bss; /* uninitialized data size */ 116 unsigned long a_syms; /* symbol table size */ 117 unsigned long a_entry; /* entry point */ 118 unsigned long a_trsize; /* text relocation size */ 119 unsigned long a_drsize; /* data relocation size */ 120 }; 121 #define a_magic a_midmag /* XXX Hack to work with current kern_execve.c */ 122 123 /* a_magic */ 124 #define OMAGIC 0407 /* old impure format */ 125 #define NMAGIC 0410 /* read-only text */ 126 #define ZMAGIC 0413 /* demand load format */ 127 #define QMAGIC 0314 /* "compact" demand load format */ 128 129 #endif /* !_EXEC_H_ */ 130