/*      $NetBSD: load_coff.cpp,v 1.6 2008/04/28 20:23:20 martin Exp $   */

/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by UCHIYAMA Yasushi.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/

#include <load.h>
#include <load_coff.h>
#undef DPRINTF // trash coff_machdep.h 's define.
#include <console.h>
#include <memory.h>
#include <file.h>

CoffLoader::CoffLoader(Console *&cons, MemoryManager *&mem)
       : Loader(cons, mem)
{
       memset(&_eh, 0, sizeof(struct coff_exechdr));
       _fh = &_eh.f;
       _ah = &_eh.a;

       DPRINTF((TEXT("Loader: COFF\n")));
}

CoffLoader::~CoffLoader(void)
{
}

BOOL
CoffLoader::setFile(File *&file)
{
       Loader::setFile(file);

       /* read COFF header and check it */
       return read_header();
}

size_t
CoffLoader::memorySize()
{
       size_t sz = _ah->a_tsize + _ah->a_dsize;

       DPRINTF((TEXT("file size: text 0x%x + data 0x%x = 0x%x byte\n"),
           _ah->a_tsize, _ah->a_dsize, sz));
       return sz;
}

kaddr_t
CoffLoader::jumpAddr()
{

       DPRINTF((TEXT("kernel entry address: 0x%08x\n"), _ah->a_entry));

       return _ah->a_entry;
}

BOOL
CoffLoader::load()
{
       size_t filesz;
       size_t memsz;
       vaddr_t kv;
       off_t fileofs;

       /* start tag chain */
       _load_segment_start();

       /* text */
       filesz = memsz = _ah->a_tsize;
       kv = _ah->a_tstart;
       fileofs = COFF_ROUND(N_TXTOFF(_fh, _ah), 16);
       DPRINTF((TEXT("[text]")));
       _load_segment(kv, memsz, fileofs, filesz);
       /* data */
       fileofs += filesz;
       filesz = memsz = _ah->a_dsize;
       kv = _ah->a_dstart;
       DPRINTF((TEXT("[data]")));
       _load_segment(kv, memsz, fileofs, filesz);
       /* bss */
       filesz = 0;
       memsz = _ah->a_bsize;
       kv = _ah->a_dstart + _ah->a_dsize;
       fileofs = 0;
       DPRINTF((TEXT("[bss ]")));
       _load_segment(kv, memsz, fileofs, filesz);

       /* tag chain still opening */
       return _load_success();
}

BOOL
CoffLoader::read_header(void)
{
#ifndef COFF_BADMAG
       DPRINTF((TEXT("coff loader not implemented.\n")));
       return FALSE;
#else
       // read COFF header
       _file->read(&_eh, sizeof(struct coff_exechdr), 0);

       // check COFF Magic.
       if (COFF_BADMAG(_fh)) {
               DPRINTF((TEXT("not a COFF file.\n")));
               return FALSE;
       }

       return TRUE;
#endif
}