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exec_aout.h
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exec_aout.h
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/* $NetBSD: exec_aout.h,v 1.38.74.1 2009/09/16 13:38:06 yamt Exp $ */
/*
* Copyright (c) 1993, 1994 Christopher G. Demetriou
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SYS_EXEC_AOUT_H_
#define _SYS_EXEC_AOUT_H_
#ifndef N_PAGSIZ
#define N_PAGSIZ(ex) (AOUT_LDPGSZ)
#endif
/*
* Header prepended to each a.out file.
* only manipulate the a_midmag field via the
* N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros below.
*/
struct exec {
u_long a_midmag; /* htonl(flags<<26 | mid<<16 | magic) */
u_long a_text; /* text segment size */
u_long a_data; /* initialized data size */
u_long a_bss; /* uninitialized data size */
u_long a_syms; /* symbol table size */
u_long a_entry; /* entry point */
u_long a_trsize; /* text relocation size */
u_long a_drsize; /* data relocation size */
};
/* a_magic */
#define OMAGIC 0407 /* old impure format */
#define NMAGIC 0410 /* read-only text */
#define ZMAGIC 0413 /* demand load format */
#define QMAGIC 0314 /* "compact" demand load format; deprecated */
#include <sys/aout_mids.h>
/*
* a_flags
*/
#define EX_DYNAMIC 0x20
#define EX_PIC 0x10
#define EX_DPMASK 0x30
/*
* Interpretation of the (a_flags & EX_DPMASK) bits:
*
* 00 traditional executable or object file
* 01 object file contains PIC code (set by `as -k')
* 10 dynamic executable
* 11 position independent executable image
* (eg. a shared library)
*
*/
/*
* The a.out structure's a_midmag field is a network-byteorder encoding
* of this int
* FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM
* Where `F' is 6 bits of flag like EX_DYNAMIC,
* `m' is 10 bits of machine-id like MID_I386, and
* `M' is 16 bits worth of magic number, ie. ZMAGIC.
* The macros below will set/get the needed fields.
*/
#define N_GETMAGIC(ex) \
((((ex).a_midmag)&0xffff0000) ? \
(be32toh((uint32_t)((ex).a_midmag))&0xffff) : ((ex).a_midmag))
#define N_GETMAGIC2(ex) \
((((ex).a_midmag)&0xffff0000) ? \
(be32toh((uint32_t)((ex).a_midmag))&0xffff) : (((ex).a_midmag) | 0x10000))
#define N_GETMID(ex) \
((((ex).a_midmag)&0xffff0000) ? \
((be32toh((uint32_t)((ex).a_midmag))>>16)&0x03ff) : MID_ZERO)
#define N_GETFLAG(ex) \
((((ex).a_midmag)&0xffff0000) ? \
((be32toh((uint32_t)((ex).a_midmag))>>26)&0x3f) : 0)
#define N_SETMAGIC(ex,mag,mid,flag) \
((ex).a_midmag = htobe32((uint32_t) \
((((flag)&0x3f)<<26)|(((mid)&0x03ff)<<16)|(((mag)&0xffff)))))
#define N_ALIGN(ex,x) \
(N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \
((x) + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1) : (x))
/* Valid magic number check. */
#define N_BADMAG(ex) \
(N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \
N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC)
/* Address of the bottom of the text segment. */
#define N_TXTADDR(ex) (N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : AOUT_LDPGSZ)
/* Address of the bottom of the data segment. */
#define N_DATADDR(ex) \
(N_GETMAGIC(ex) == OMAGIC ? N_TXTADDR(ex) + (ex).a_text : \
(N_TXTADDR(ex) + (ex).a_text + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1))
/* Address of the bottom of the bss segment. */
#define N_BSSADDR(ex) \
(N_DATADDR(ex) + (ex).a_data)
/* Text segment offset. */
#define N_TXTOFF(ex) \
( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? AOUT_LDPGSZ : \
sizeof(struct exec)) )
/* Data segment offset. */
#define N_DATOFF(ex) \
N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
/* Text relocation table offset. */
#define N_TRELOFF(ex) \
(N_DATOFF(ex) + (ex).a_data)
/* Data relocation table offset. */
#define N_DRELOFF(ex) \
(N_TRELOFF(ex) + (ex).a_trsize)
/* Symbol table offset. */
#define N_SYMOFF(ex) \
(N_DRELOFF(ex) + (ex).a_drsize)
/* String table offset. */
#define N_STROFF(ex) \
(N_SYMOFF(ex) + (ex).a_syms)
#include <machine/aout_machdep.h>
#ifdef _KERNEL
/* the "a.out" format's entry in the exec switch */
int exec_aout_makecmds(struct lwp *, struct exec_package *);
/* functions which prepare various a.out executable types */
/*
* MI portion
*/
int exec_aout_prep_zmagic(struct lwp *, struct exec_package *);
int exec_aout_prep_nmagic(struct lwp *, struct exec_package *);
int exec_aout_prep_omagic(struct lwp *, struct exec_package *);
/* For compatibility modules */
int exec_aout_prep_oldzmagic(struct lwp *, struct exec_package *);
int exec_aout_prep_oldnmagic(struct lwp *, struct exec_package *);
int exec_aout_prep_oldomagic(struct lwp *, struct exec_package *);
/*
* MD portion
*/
#ifndef cpu_exec_aout_makecmds
int cpu_exec_aout_makecmds(struct lwp *, struct exec_package *);
#endif
#endif /* _KERNEL */
#endif /* !_SYS_EXEC_AOUT_H_ */