| 1 | /* $XFree86: xc/programs/Xserver/hw/xfree86/loader/aout.h,v 1.7 2002/05/31 18:46:00 dawes Exp $ */
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| 2 |
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| 3 | /*
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| 4 | * Borrowed from NetBSD's exec_aout.h
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| 5 | *
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| 6 | * Copyright (c) 1993, 1994 Christopher G. Demetriou
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| 7 | * All rights reserved.
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| 8 | *
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| 9 | * Redistribution and use in source and binary forms, with or without
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| 10 | * modification, are permitted provided that the following conditions
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| 11 | * are met:
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| 12 | * 1. Redistributions of source code must retain the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer.
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| 14 | * 2. Redistributions in binary form must reproduce the above copyright
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| 15 | * notice, this list of conditions and the following disclaimer in the
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| 16 | * documentation and/or other materials provided with the distribution.
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| 17 | * 3. All advertising materials mentioning features or use of this software
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| 18 | * must display the following acknowledgement:
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| 19 | * This product includes software developed by Christopher G. Demetriou.
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| 20 | * 4. The name of the author may not be used to endorse or promote products
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| 21 | * derived from this software without specific prior written permission
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| 22 | *
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| 23 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 24 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 25 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 26 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 27 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 28 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 29 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 30 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 32 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 33 | */
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| 34 |
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| 35 | #ifdef HAVE_XORG_CONFIG_H
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| 36 | #include <xorg-config.h>
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| 37 | #endif
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| 38 |
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| 39 | #ifndef _AOUT_H
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| 40 | #define _AOUT_H
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| 41 |
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| 42 | #include <X11/Xos.h>
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| 43 |
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| 44 | /* Get prototype for ntohl, per SuSv3. */
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| 45 | #include <arpa/inet.h>
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| 46 |
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| 47 | /* OS/2 EMX has ntohl in this file */
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| 48 | #ifdef __UNIXOS2__
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| 49 | #include <sys/param.h>
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| 50 | #endif
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| 51 |
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| 52 | #define __LDPGSZ 4096U
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| 53 | #ifndef AOUT_PAGSIZ
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| 54 | #define AOUT_PAGSIZ(ex) (__LDPGSZ)
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| 55 | #endif
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| 56 |
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| 57 | /*
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| 58 | * a.out header
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| 59 | */
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| 60 | typedef struct AOUT_exec {
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| 61 | unsigned long a_midmag; /* htonl(flags<<26 | mid<<16 | magic) */
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| 62 | unsigned long a_text; /* text segment size */
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| 63 | unsigned long a_data; /* initialized data size */
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| 64 | unsigned long a_bss; /* uninitialized data size */
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| 65 | unsigned long a_syms; /* symbol table size */
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| 66 | unsigned long a_entry; /* entry point */
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| 67 | unsigned long a_trsize; /* text relocation size */
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| 68 | unsigned long a_drsize; /* data relocation size */
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| 69 | } AOUTHDR;
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| 70 |
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| 71 | /* a_magic */
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| 72 | #define OMAGIC 0407 /* old impure format */
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| 73 | #define NMAGIC 0410 /* read-only text */
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| 74 | #define ZMAGIC 0413 /* demand load format */
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| 75 | #define QMAGIC 0314 /* "compact" demand load format; deprecated */
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| 76 |
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| 77 | /*
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| 78 | * a_mid - keep sorted in numerical order for sanity's sake
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| 79 | * ensure that: 0 < mid < 0x3ff
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| 80 | */
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| 81 | #define MID_ZERO 0 /* unknown - implementation dependent */
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| 82 | #define MID_SUN010 1 /* sun 68010/68020 binary */
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| 83 | #define MID_SUN020 2 /* sun 68020-only binary */
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| 84 | #define MID_PC386 100 /* 386 PC binary. (so quoth BFD) */
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| 85 | #define MID_HP200 200 /* hp200 (68010) BSD binary */
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| 86 | #define MID_I386 134 /* i386 BSD binary */
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| 87 | #define MID_M68K 135 /* m68k BSD binary with 8K page sizes */
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| 88 | #define MID_M68K4K 136 /* m68k BSD binary with 4K page sizes */
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| 89 | #define MID_NS32532 137 /* ns32532 */
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| 90 | #define MID_SPARC 138 /* sparc */
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| 91 | #define MID_PMAX 139 /* pmax */
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| 92 | #define MID_VAX 140 /* vax */
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| 93 | #define MID_ALPHA 141 /* Alpha BSD binary */
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| 94 | #define MID_MIPS 142 /* big-endian MIPS */
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| 95 | #define MID_ARM6 143 /* ARM6 */
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| 96 | #define MID_HP300 300 /* hp300 (68020+68881) BSD binary */
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| 97 | #define MID_HPUX 0x20C /* hp200/300 HP-UX binary */
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| 98 | #define MID_HPUX800 0x20B /* hp800 HP-UX binary */
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| 99 |
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| 100 | /*
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| 101 | * a_flags
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| 102 | */
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| 103 | #define EX_DYNAMIC 0x20
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| 104 | #define EX_PIC 0x10
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| 105 | #define EX_DPMASK 0x30
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| 106 | /*
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| 107 | * Interpretation of the (a_flags & EX_DPMASK) bits:
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| 108 | *
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| 109 | * 00 traditional executable or object file
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| 110 | * 01 object file contains PIC code (set by `as -k')
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| 111 | * 10 dynamic executable
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| 112 | * 11 position independent executable image
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| 113 | * (eg. a shared library)
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| 114 | *
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| 115 | */
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| 116 |
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| 117 | /*
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| 118 | * The a.out structure's a_midmag field is a network-byteorder encoding
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| 119 | * of this int
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| 120 | * FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM
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| 121 | * Where `F' is 6 bits of flag like EX_DYNAMIC,
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| 122 | * `m' is 10 bits of machine-id like MID_I386, and
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| 123 | * `M' is 16 bits worth of magic number, ie. ZMAGIC.
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| 124 | * The macros below will set/get the needed fields.
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| 125 | */
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| 126 | #define AOUT_GETMAGIC(ex) \
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| 127 | ( (((ex)->a_midmag)&0xffff0000U) ? (ntohl(((ex)->a_midmag))&0xffffU) : ((ex)->a_midmag))
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| 128 | #define AOUT_GETMAGIC2(ex) \
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| 129 | ( (((ex)->a_midmag)&0xffff0000U) ? (ntohl(((ex)->a_midmag))&0xffffU) : \
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| 130 | (((ex)->a_midmag) | 0x10000) )
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| 131 | #define AOUT_GETMID(ex) \
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| 132 | ( (((ex)->a_midmag)&0xffff0000U) ? ((ntohl(((ex)->a_midmag))>>16)&0x03ffU) : MID_ZERO )
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| 133 | #define AOUT_GETFLAG(ex) \
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| 134 | ( (((ex)->a_midmag)&0xffff0000U) ? ((ntohl(((ex)->a_midmag))>>26)&0x3fU) : 0 )
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| 135 | #define AOUT_SETMAGIC(ex,mag,mid,flag) \
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| 136 | ( (ex)->a_midmag = htonl( (((flag)&0x3fU)<<26) | (((mid)&0x03ffU)<<16) | \
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| 137 | (((mag)&0xffffU)) ) )
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| 138 |
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| 139 | #define AOUT_ALIGN(ex,x) \
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| 140 | (AOUT_GETMAGIC(ex) == ZMAGIC || AOUT_GETMAGIC(ex) == QMAGIC ? \
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| 141 | ((x) + __LDPGSZ - 1) & ~(__LDPGSZ - 1) : (x))
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| 142 |
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| 143 | /* Valid magic number check. */
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| 144 | #define AOUT_BADMAG(ex) \
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| 145 | (AOUT_GETMAGIC(ex) != NMAGIC && AOUT_GETMAGIC(ex) != OMAGIC && \
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| 146 | AOUT_GETMAGIC(ex) != ZMAGIC && AOUT_GETMAGIC(ex) != QMAGIC)
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| 147 |
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| 148 | /* Address of the bottom of the text segment. */
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| 149 | #define AOUT_TXTADDR(ex) (AOUT_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : __LDPGSZ)
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| 150 |
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| 151 | /* Address of the bottom of the data segment. */
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| 152 | #define AOUT_DATADDR(ex) \
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| 153 | (AOUT_GETMAGIC(ex) == OMAGIC ? AOUT_TXTADDR(ex) + (ex)->a_text : \
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| 154 | (AOUT_TXTADDR(ex) + (ex)->a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1))
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| 155 |
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| 156 | /* Address of the bottom of the bss segment. */
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| 157 | #define AOUT_BSSADDR(ex) \
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| 158 | (AOUT_DATADDR(ex) + (ex)->a_data)
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| 159 |
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| 160 | /* Text segment offset. */
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| 161 | #define AOUT_TXTOFF(ex) \
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| 162 | ( AOUT_GETMAGIC2(ex)==ZMAGIC || AOUT_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
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| 163 | 0 : (AOUT_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? __LDPGSZ : \
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| 164 | sizeof(struct AOUT_exec)) )
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| 165 |
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| 166 | /* Data segment offset. */
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| 167 | #define AOUT_DATOFF(ex) \
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| 168 | AOUT_ALIGN(ex, AOUT_TXTOFF(ex) + (ex)->a_text)
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| 169 |
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| 170 | /* Text relocation table offset. */
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| 171 | #define AOUT_TRELOFF(ex) \
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| 172 | (AOUT_DATOFF(ex) + (ex)->a_data)
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| 173 |
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| 174 | /* Data relocation table offset. */
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| 175 | #define AOUT_DRELOFF(ex) \
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| 176 | (AOUT_TRELOFF(ex) + (ex)->a_trsize)
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| 177 |
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| 178 | /* Symbol table offset. */
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| 179 | #define AOUT_SYMOFF(ex) \
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| 180 | (AOUT_DRELOFF(ex) + (ex)->a_drsize)
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| 181 |
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| 182 | /* String table offset. */
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| 183 | #define AOUT_STROFF(ex) \
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| 184 | (AOUT_SYMOFF(ex) + (ex)->a_syms)
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| 185 |
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| 186 | /* Relocation format. */
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| 187 | struct relocation_info_i386 {
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| 188 | int r_address; /* offset in text or data segment */
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| 189 | unsigned int r_symbolnum:24, /* ordinal number of add symbol */
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| 190 | r_pcrel:1, /* 1 if value should be pc-relative */
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| 191 | r_length:2, /* log base 2 of value's width */
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| 192 | r_extern:1, /* 1 if need to add symbol to value */
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| 193 | r_baserel:1, /* linkage table relative */
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| 194 | r_jmptable:1, /* relocate to jump table */
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| 195 | r_relative:1, /* load address relative */
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| 196 | r_copy:1; /* run time copy */
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| 197 | };
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| 198 |
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| 199 | #define relocation_info relocation_info_i386
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| 200 |
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| 201 | /*
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| 202 | * Symbol table entry format. The #ifdef's are so that programs including
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| 203 | * nlist.h can initialize nlist structures statically.
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| 204 | */
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| 205 | typedef struct AOUT_nlist {
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| 206 | union {
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| 207 | char *n_name; /* symbol name (in memory) */
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| 208 | long n_strx; /* file string table offset (on disk) */
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| 209 | } n_un;
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| 210 |
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| 211 | #define AOUT_UNDF 0x00 /* undefined */
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| 212 | #define AOUT_ABS 0x02 /* absolute address */
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| 213 | #define AOUT_TEXT 0x04 /* text segment */
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| 214 | #define AOUT_DATA 0x06 /* data segment */
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| 215 | #define AOUT_BSS 0x08 /* bss segment */
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| 216 | #define AOUT_INDR 0x0a /* alias definition */
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| 217 | #define AOUT_SIZE 0x0c /* pseudo type, defines a symbol's size */
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| 218 | #define AOUT_COMM 0x12 /* common reference */
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| 219 | #define AOUT_FN 0x1e /* file name (AOUT_EXT on) */
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| 220 | #define AOUT_WARN 0x1e /* warning message (AOUT_EXT off) */
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| 221 |
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| 222 | #define AOUT_EXT 0x01 /* external (global) bit, OR'ed in */
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| 223 | #define AOUT_TYPE 0x1e /* mask for all the type bits */
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| 224 | unsigned char n_type; /* type defines */
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| 225 |
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| 226 | char n_other; /* spare */
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| 227 | #define n_hash n_desc /* used internally by ld(1); XXX */
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| 228 | short n_desc; /* used by stab entries */
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| 229 | unsigned long n_value; /* address/value of the symbol */
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| 230 | } AOUT_nlist;
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| 231 |
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| 232 | #define AOUT_FORMAT "%08x" /* namelist value format; XXX */
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| 233 | #define AOUT_STAB 0x0e0 /* mask for debugger symbols -- stab(5) */
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| 234 |
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| 235 | #endif
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