/* $NetBSD: exec_coff.h,v 1.7 2005/12/11 12:25:20 christos Exp $ */

/*-
 * Copyright (C) 2000 SAITOH Masanobu.  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. 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_COFF_H_
#define _SYS_EXEC_COFF_H_

#include <machine/coff_machdep.h>

/*
 * COFF file header
 */

struct coff_filehdr {
        u_short f_magic;        /* magic number */
        u_short f_nscns;        /* # of sections */
        long    f_timdat;       /* timestamp */
        long    f_symptr;       /* file offset of symbol table */
        long    f_nsyms;        /* # of symbol table entries */
        u_short f_opthdr;       /* size of optional header */
        u_short f_flags;        /* flags */
};

/* f_flags */
#define COFF_F_RELFLG   0x1
#define COFF_F_EXEC     0x2
#define COFF_F_LNNO     0x4
#define COFF_F_LSYMS    0x8
#define COFF_F_SWABD    0x40
#define COFF_F_AR16WR   0x80
#define COFF_F_AR32WR   0x100
#define COFF_F_AR32W    0x200

/*
 * COFF system header
 */

struct coff_aouthdr {
        short   a_magic;
        short   a_vstamp;
        long    a_tsize;
        long    a_dsize;
        long    a_bsize;
        long    a_entry;
        long    a_tstart;
        long    a_dstart;
};

/*
 * COFF section header
 */

struct coff_scnhdr {
        char    s_name[8];
        long    s_paddr;
        long    s_vaddr;
        long    s_size;
        long    s_scnptr;
        long    s_relptr;
        long    s_lnnoptr;
        u_short s_nreloc;
        u_short s_nlnno;
        long    s_flags;
};

/* s_flags */
#define COFF_STYP_REG           0x00
#define COFF_STYP_DSECT         0x01
#define COFF_STYP_NOLOAD        0x02
#define COFF_STYP_GROUP         0x04
#define COFF_STYP_PAD           0x08
#define COFF_STYP_COPY          0x10
#define COFF_STYP_TEXT          0x20
#define COFF_STYP_DATA          0x40
#define COFF_STYP_BSS           0x80
#define COFF_STYP_INFO          0x200
#define COFF_STYP_OVER          0x400
#define COFF_STYP_SHLIB         0x800

/*
 * COFF shared library header
 */

struct coff_slhdr {
        long    entry_len;      /* in words */
        long    path_index;     /* in words */
        char    sl_name[1];
};

struct coff_exechdr {
        struct coff_filehdr f;
        struct coff_aouthdr a;
};

#define COFF_ROUND(val, by)     (((val) + by - 1) & ~(by - 1))

#define COFF_ALIGN(a) ((a) & ~(COFF_LDPGSZ - 1))

#define COFF_HDR_SIZE \
        (sizeof(struct coff_filehdr) + sizeof(struct coff_aouthdr))

#define COFF_BLOCK_ALIGN(ap, value) \
        ((ap)->a_magic == COFF_ZMAGIC ? COFF_ROUND(value, COFF_LDPGSZ) : \
         value)

#define COFF_TXTOFF(fp, ap) \
        ((ap)->a_magic == COFF_ZMAGIC ? 0 : \
         COFF_ROUND(COFF_HDR_SIZE + (fp)->f_nscns * \
                    sizeof(struct coff_scnhdr), \
                    COFF_SEGMENT_ALIGNMENT(fp, ap)))

#define COFF_DATOFF(fp, ap) \
        (COFF_BLOCK_ALIGN(ap, COFF_TXTOFF(fp, ap) + (ap)->a_tsize))

#define COFF_SEGMENT_ALIGN(fp, ap, value) \
        (COFF_ROUND(value, ((ap)->a_magic == COFF_ZMAGIC ? COFF_LDPGSZ : \
         COFF_SEGMENT_ALIGNMENT(fp, ap))))

#ifdef _KERNEL
int     exec_coff_makecmds(struct lwp *, struct exec_package *);

int     exec_coff_prep_omagic(struct lwp *, struct exec_package *,
                                struct coff_filehdr *,
                                struct coff_aouthdr *);
int     exec_coff_prep_nmagic(struct lwp *, struct exec_package *,
                                struct coff_filehdr *,
                                struct coff_aouthdr *);
int     exec_coff_prep_zmagic(struct lwp *, struct exec_package *,
                                struct coff_filehdr *,
                                struct coff_aouthdr *);
#endif /* _KERNEL */
#endif /* !_SYS_EXEC_COFF_H_ */