135 lines
3.4 KiB
C++
135 lines
3.4 KiB
C++
/* $NetBSD: load_coff.cpp,v 1.6 2008/04/28 20:23:20 martin Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by UCHIYAMA Yasushi.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <load.h>
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#include <load_coff.h>
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#undef DPRINTF // trash coff_machdep.h 's define.
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#include <console.h>
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#include <memory.h>
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#include <file.h>
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CoffLoader::CoffLoader(Console *&cons, MemoryManager *&mem)
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: Loader(cons, mem)
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{
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memset(&_eh, 0, sizeof(struct coff_exechdr));
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_fh = &_eh.f;
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_ah = &_eh.a;
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DPRINTF((TEXT("Loader: COFF\n")));
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}
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CoffLoader::~CoffLoader(void)
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{
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}
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BOOL
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CoffLoader::setFile(File *&file)
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{
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Loader::setFile(file);
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/* read COFF header and check it */
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return read_header();
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}
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size_t
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CoffLoader::memorySize()
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{
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size_t sz = _ah->a_tsize + _ah->a_dsize;
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DPRINTF((TEXT("file size: text 0x%x + data 0x%x = 0x%x byte\n"),
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_ah->a_tsize, _ah->a_dsize, sz));
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return sz;
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}
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kaddr_t
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CoffLoader::jumpAddr()
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{
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DPRINTF((TEXT("kernel entry address: 0x%08x\n"), _ah->a_entry));
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return _ah->a_entry;
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}
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BOOL
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CoffLoader::load()
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{
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size_t filesz;
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size_t memsz;
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vaddr_t kv;
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off_t fileofs;
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/* start tag chain */
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_load_segment_start();
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/* text */
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filesz = memsz = _ah->a_tsize;
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kv = _ah->a_tstart;
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fileofs = COFF_ROUND(N_TXTOFF(_fh, _ah), 16);
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DPRINTF((TEXT("[text]")));
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_load_segment(kv, memsz, fileofs, filesz);
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/* data */
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fileofs += filesz;
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filesz = memsz = _ah->a_dsize;
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kv = _ah->a_dstart;
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DPRINTF((TEXT("[data]")));
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_load_segment(kv, memsz, fileofs, filesz);
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/* bss */
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filesz = 0;
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memsz = _ah->a_bsize;
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kv = _ah->a_dstart + _ah->a_dsize;
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fileofs = 0;
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DPRINTF((TEXT("[bss ]")));
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_load_segment(kv, memsz, fileofs, filesz);
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/* tag chain still opening */
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return _load_success();
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}
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BOOL
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CoffLoader::read_header(void)
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{
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#ifndef COFF_BADMAG
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DPRINTF((TEXT("coff loader not implemented.\n")));
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return FALSE;
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#else
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// read COFF header
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_file->read(&_eh, sizeof(struct coff_exechdr), 0);
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// check COFF Magic.
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if (COFF_BADMAG(_fh)) {
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DPRINTF((TEXT("not a COFF file.\n")));
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return FALSE;
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}
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return TRUE;
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#endif
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}
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