232 lines
8.7 KiB
C
232 lines
8.7 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/loader/aout.h,v 1.7 2002/05/31 18:46:00 dawes Exp $ */
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/*
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* Borrowed from NetBSD's exec_aout.h
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*
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* Copyright (c) 1993, 1994 Christopher G. Demetriou
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _AOUT_H
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#define _AOUT_H
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#include "Xos.h"
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/* Get prototype for ntohl. */
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#include <ctype.h>
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/* OS/2 EMX has ntohl in this file */
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#ifdef __UNIXOS2__
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#include <sys/param.h>
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#endif
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#define __LDPGSZ 4096U
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#ifndef AOUT_PAGSIZ
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#define AOUT_PAGSIZ(ex) (__LDPGSZ)
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#endif
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/*
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* a.out header
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*/
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typedef struct AOUT_exec {
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unsigned long a_midmag; /* htonl(flags<<26 | mid<<16 | magic) */
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unsigned long a_text; /* text segment size */
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unsigned long a_data; /* initialized data size */
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unsigned long a_bss; /* uninitialized data size */
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unsigned long a_syms; /* symbol table size */
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unsigned long a_entry; /* entry point */
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unsigned long a_trsize; /* text relocation size */
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unsigned long a_drsize; /* data relocation size */
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} AOUTHDR;
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/* a_magic */
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#define OMAGIC 0407 /* old impure format */
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#define NMAGIC 0410 /* read-only text */
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#define ZMAGIC 0413 /* demand load format */
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#define QMAGIC 0314 /* "compact" demand load format; deprecated */
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/*
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* a_mid - keep sorted in numerical order for sanity's sake
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* ensure that: 0 < mid < 0x3ff
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*/
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#define MID_ZERO 0 /* unknown - implementation dependent */
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#define MID_SUN010 1 /* sun 68010/68020 binary */
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#define MID_SUN020 2 /* sun 68020-only binary */
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#define MID_PC386 100 /* 386 PC binary. (so quoth BFD) */
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#define MID_HP200 200 /* hp200 (68010) BSD binary */
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#define MID_I386 134 /* i386 BSD binary */
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#define MID_M68K 135 /* m68k BSD binary with 8K page sizes */
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#define MID_M68K4K 136 /* m68k BSD binary with 4K page sizes */
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#define MID_NS32532 137 /* ns32532 */
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#define MID_SPARC 138 /* sparc */
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#define MID_PMAX 139 /* pmax */
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#define MID_VAX 140 /* vax */
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#define MID_ALPHA 141 /* Alpha BSD binary */
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#define MID_MIPS 142 /* big-endian MIPS */
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#define MID_ARM6 143 /* ARM6 */
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#define MID_HP300 300 /* hp300 (68020+68881) BSD binary */
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#define MID_HPUX 0x20C /* hp200/300 HP-UX binary */
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#define MID_HPUX800 0x20B /* hp800 HP-UX binary */
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/*
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* a_flags
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*/
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#define EX_DYNAMIC 0x20
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#define EX_PIC 0x10
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#define EX_DPMASK 0x30
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/*
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* Interpretation of the (a_flags & EX_DPMASK) bits:
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*
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* 00 traditional executable or object file
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* 01 object file contains PIC code (set by `as -k')
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* 10 dynamic executable
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* 11 position independent executable image
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* (eg. a shared library)
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*
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*/
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/*
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* The a.out structure's a_midmag field is a network-byteorder encoding
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* of this int
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* FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM
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* Where `F' is 6 bits of flag like EX_DYNAMIC,
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* `m' is 10 bits of machine-id like MID_I386, and
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* `M' is 16 bits worth of magic number, ie. ZMAGIC.
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* The macros below will set/get the needed fields.
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*/
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#define AOUT_GETMAGIC(ex) \
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( (((ex)->a_midmag)&0xffff0000U) ? (ntohl(((ex)->a_midmag))&0xffffU) : ((ex)->a_midmag))
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#define AOUT_GETMAGIC2(ex) \
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( (((ex)->a_midmag)&0xffff0000U) ? (ntohl(((ex)->a_midmag))&0xffffU) : \
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(((ex)->a_midmag) | 0x10000) )
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#define AOUT_GETMID(ex) \
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( (((ex)->a_midmag)&0xffff0000U) ? ((ntohl(((ex)->a_midmag))>>16)&0x03ffU) : MID_ZERO )
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#define AOUT_GETFLAG(ex) \
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( (((ex)->a_midmag)&0xffff0000U) ? ((ntohl(((ex)->a_midmag))>>26)&0x3fU) : 0 )
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#define AOUT_SETMAGIC(ex,mag,mid,flag) \
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( (ex)->a_midmag = htonl( (((flag)&0x3fU)<<26) | (((mid)&0x03ffU)<<16) | \
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(((mag)&0xffffU)) ) )
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#define AOUT_ALIGN(ex,x) \
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(AOUT_GETMAGIC(ex) == ZMAGIC || AOUT_GETMAGIC(ex) == QMAGIC ? \
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((x) + __LDPGSZ - 1) & ~(__LDPGSZ - 1) : (x))
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/* Valid magic number check. */
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#define AOUT_BADMAG(ex) \
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(AOUT_GETMAGIC(ex) != NMAGIC && AOUT_GETMAGIC(ex) != OMAGIC && \
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AOUT_GETMAGIC(ex) != ZMAGIC && AOUT_GETMAGIC(ex) != QMAGIC)
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/* Address of the bottom of the text segment. */
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#define AOUT_TXTADDR(ex) (AOUT_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : __LDPGSZ)
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/* Address of the bottom of the data segment. */
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#define AOUT_DATADDR(ex) \
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(AOUT_GETMAGIC(ex) == OMAGIC ? AOUT_TXTADDR(ex) + (ex)->a_text : \
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(AOUT_TXTADDR(ex) + (ex)->a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1))
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/* Address of the bottom of the bss segment. */
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#define AOUT_BSSADDR(ex) \
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(AOUT_DATADDR(ex) + (ex)->a_data)
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/* Text segment offset. */
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#define AOUT_TXTOFF(ex) \
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( AOUT_GETMAGIC2(ex)==ZMAGIC || AOUT_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
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0 : (AOUT_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? __LDPGSZ : \
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sizeof(struct AOUT_exec)) )
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/* Data segment offset. */
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#define AOUT_DATOFF(ex) \
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AOUT_ALIGN(ex, AOUT_TXTOFF(ex) + (ex)->a_text)
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/* Text relocation table offset. */
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#define AOUT_TRELOFF(ex) \
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(AOUT_DATOFF(ex) + (ex)->a_data)
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/* Data relocation table offset. */
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#define AOUT_DRELOFF(ex) \
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(AOUT_TRELOFF(ex) + (ex)->a_trsize)
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/* Symbol table offset. */
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#define AOUT_SYMOFF(ex) \
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(AOUT_DRELOFF(ex) + (ex)->a_drsize)
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/* String table offset. */
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#define AOUT_STROFF(ex) \
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(AOUT_SYMOFF(ex) + (ex)->a_syms)
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/* Relocation format. */
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struct relocation_info_i386 {
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int r_address; /* offset in text or data segment */
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unsigned int r_symbolnum:24, /* ordinal number of add symbol */
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r_pcrel:1, /* 1 if value should be pc-relative */
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r_length:2, /* log base 2 of value's width */
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r_extern:1, /* 1 if need to add symbol to value */
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r_baserel:1, /* linkage table relative */
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r_jmptable:1, /* relocate to jump table */
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r_relative:1, /* load address relative */
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r_copy:1; /* run time copy */
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};
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#define relocation_info relocation_info_i386
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/*
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* Symbol table entry format. The #ifdef's are so that programs including
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* nlist.h can initialize nlist structures statically.
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*/
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typedef struct AOUT_nlist {
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union {
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char *n_name; /* symbol name (in memory) */
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long n_strx; /* file string table offset (on disk) */
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} n_un;
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#define AOUT_UNDF 0x00 /* undefined */
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#define AOUT_ABS 0x02 /* absolute address */
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#define AOUT_TEXT 0x04 /* text segment */
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#define AOUT_DATA 0x06 /* data segment */
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#define AOUT_BSS 0x08 /* bss segment */
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#define AOUT_INDR 0x0a /* alias definition */
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#define AOUT_SIZE 0x0c /* pseudo type, defines a symbol's size */
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#define AOUT_COMM 0x12 /* common reference */
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#define AOUT_FN 0x1e /* file name (AOUT_EXT on) */
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#define AOUT_WARN 0x1e /* warning message (AOUT_EXT off) */
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#define AOUT_EXT 0x01 /* external (global) bit, OR'ed in */
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#define AOUT_TYPE 0x1e /* mask for all the type bits */
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unsigned char n_type; /* type defines */
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char n_other; /* spare */
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#define n_hash n_desc /* used internally by ld(1); XXX */
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short n_desc; /* used by stab entries */
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unsigned long n_value; /* address/value of the symbol */
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} AOUT_nlist;
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#define AOUT_FORMAT "%08x" /* namelist value format; XXX */
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#define AOUT_STAB 0x0e0 /* mask for debugger symbols -- stab(5) */
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#endif
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