LCOM1920-T02G10

/*        $NetBSD: exec_aout.h,v 1.40 2012/03/17 21:54:12 martin 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) \

    ((((uint32_t)(ex).a_midmag)&0xffff0000) ? \

    (be32toh((uint32_t)((ex).a_midmag))&0xffff) : ((ex).a_midmag))

#define        N_GETMAGIC2(ex) \

    ((((uint32_t)(ex).a_midmag)&0xffff0000) ? \

    (be32toh((uint32_t)((ex).a_midmag))&0xffff) : (((ex).a_midmag) | 0x10000))

#define        N_GETMID(ex) \

    ((((uint32_t)(ex).a_midmag)&0xffff0000) ? \

    ((be32toh((uint32_t)((ex).a_midmag))>>16)&0x03ff) : MID_ZERO)

#define        N_GETFLAG(ex) \

    ((((uint32_t)(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_ */