/*      $NetBSD: mopcopy.c,v 1.14 2024/12/03 05:57:02 kalvisd Exp $     */

/* mopcopy - Convert a Unix format kernel into something that
 * can be transferred via MOP.
 *
 * This code was written while referring to the NetBSD/vax boot
 * loader. Therefore anything that can be booted by the Vax
 * should be convertible with this program.
 *
 * If necessary, the a.out header is stripped, and the program
 * segments are padded out. The BSS segment is zero filled.
 * A header is prepended that looks like an IHD header. In 
 * particular the Unix machine ID is placed where mopd expects
 * the image type to be (offset is IHD_W_ALIAS). If the machine
 * ID could be mistaken for a DEC image type, then the conversion 
 * is aborted. The original a.out header is copied into the front
 * of the header so that once we have detected the Unix machine
 * ID we can haul the load address and the xfer address out.
 */

/*
 * Copyright (c) 1996 Lloyd Parkes.  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 Lloyd Parkes.
 * 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.
 */

#if defined (HAVE_NBTOOL_CONFIG_H)
# include "nbtool_config.h"
#else
# include "port.h"
#endif /* defined (HAVE_NBTOOL_CONFIG_H) */
#ifndef lint
__RCSID("$NetBSD: mopcopy.c,v 1.14 2024/12/03 05:57:02 kalvisd Exp $");
#endif

#include "os.h"
#include "common.h"
#include "mopdef.h"
#include "file.h"
#if !defined(NOAOUT)
#if defined (HAVE_NBTOOL_CONFIG_H) || defined(__NetBSD__) || defined(__OpenBSD__)
#include <sys/exec_aout.h>
#endif
#if defined(__FreeBSD__)
#include <sys/imgact_aout.h>
#endif
#endif /* !NOAOUT */
#if defined(__bsdi__)
#include <a.out.h>
#define NOAOUT
#endif
#if !defined(MID_VAX)
#define MID_VAX 150
#endif
#if !defined(MID_VAX1K)
#define MID_VAX1K 140
#endif

#ifndef NOELF
# if defined (HAVE_NBTOOL_CONFIG_H) || defined(__NetBSD__)
#  include <sys/exec_elf.h>
# else
#  define NOELF
# endif
# if !defined(EM_VAX)
#  define EM_VAX 75
# endif
#endif /* NOELF */

u_char header[512];             /* The VAX header we generate is 1 block. */
#if !defined(NOAOUT)
struct exec ex, ex_swap;
#endif

int
main(int argc, char **argv)
{
        FILE   *out;            /* A FILE because that is easier. */
        int     i, j;
        struct dllist dl;

        if (argc != 3) {
                fprintf (stderr, "usage: %s kernel-in sys-out\n",
                    getprogname());
                return (1);
        }
        
        dl.ldfd = open (argv[1], O_RDONLY);
        if (dl.ldfd == -1)
                err(2, "open `%s'", argv[1]);
        
        if (GetFileInfo(&dl) == -1)
                errx(3, "`%s' is an unknown file type", argv[1]);

        switch (dl.image_type) {
        case IMAGE_TYPE_MOP:
                errx(3, "`%s' is already a MOP image", argv[1]);
                break;

#ifndef NOELF
        case IMAGE_TYPE_ELF32:
                if (dl.e_machine != EM_VAX)
                        printf("WARNING: `%s' is not a VAX image "
                            "(machine=%d)\n", argv[1], dl.e_machine);
                for (i = 0, j = 0; j < dl.e_nsec; j++)
                        i += dl.e_sections[j].s_fsize + dl.e_sections[j].s_pad;
                break;
#endif

#ifndef NOAOUT
        case IMAGE_TYPE_AOUT:
                if (dl.a_mid != MID_VAX && dl.a_mid != MID_VAX1K)
                        printf("WARNING: `%s' is not a VAX image (mid=%d)\n",
                            argv[1], dl.a_mid);
                i = dl.a_text + dl.a_text_fill + dl.a_data + dl.a_data_fill +
                    dl.a_bss  + dl.a_bss_fill;
                break;
#endif

        default:
                errx(3, "Image type `%s' not supported",
                    FileTypeName(dl.image_type));
        }

        i = (i+1) / 512;

        dl.nloadaddr = dl.loadaddr;
        dl.lseek     = lseek(dl.ldfd,0L,SEEK_CUR);
        dl.a_lseek   = 0;
        dl.count     = 0;
        dl.dl_bsz    = 512;

        mopFilePutLX(header,IHD_W_SIZE,0xd4,2);   /* Offset to ISD section. */
        mopFilePutLX(header,IHD_W_ACTIVOFF,0x30,2);/* Offset to 1st section.*/
        mopFilePutLX(header,IHD_W_ALIAS,IHD_C_NATIVE,2);/* It's a VAX image.*/
        mopFilePutLX(header,IHD_B_HDRBLKCNT,1,1); /* Only one header block. */
        mopFilePutLX(header,0xd4+ISD_V_VPN,dl.loadaddr/512,2);/* load Addr */
        mopFilePutLX(header,0x30+IHA_L_TFRADR1,dl.xferaddr,4); /* Xfer Addr */
        mopFilePutLX(header,0xd4+ISD_W_PAGCNT,i,2);/* Imagesize in blks.*/
        
        out = fopen (argv[2], "w");
        if (!out)
                err(2, "writing `%s'", argv[2]);
        
        /* Now we do the actual work. Write VAX MOP-image header */
        
        fwrite (header, sizeof (header), 1, out);

        switch (dl.image_type) {
        case IMAGE_TYPE_MOP:
                abort();

        case IMAGE_TYPE_ELF32:
#ifdef NOELF
                abort();
#else
                fprintf(stderr, "copying ");
                for (j = 0; j < dl.e_nsec; j++)
                        fprintf(stderr, "%s%u+%u", j == 0 ? "" : "+",
                            dl.e_sections[j].s_fsize,
                            dl.e_sections[j].s_pad);
                fprintf(stderr, "->0x%x\n", dl.xferaddr);
#endif
                break;

        case IMAGE_TYPE_AOUT:
#ifdef NOAOUT
                abort();
#else
                fprintf(stderr, "copying %u+%u+%u->0x%x\n", dl.a_text,
                    dl.a_data, dl.a_bss, dl.xferaddr);
#endif
                break;
        }
        
        while ((i = mopFileRead(&dl,header)) > 0) {
                (void)fwrite(header, i, 1, out);
        }
        
        fclose (out);
        return (0);
}