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load_coff.cpp revision 1.5 
      1 /*	$NetBSD: load_coff.cpp,v 1.5 2005/12/11 12:17:28 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by UCHIYAMA Yasushi.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <load.h>
     40 #include <load_coff.h>
     41 #undef DPRINTF // trash coff_machdep.h 's define.
     42 #include <console.h>
     43 #include <memory.h>
     44 #include <file.h>
     45 
     46 CoffLoader::CoffLoader(Console *&cons, MemoryManager *&mem)
     47 	: Loader(cons, mem)
     48 {
     49 	memset(&_eh, 0, sizeof(struct coff_exechdr));
     50 	_fh = &_eh.f;
     51 	_ah = &_eh.a;
     52 
     53 	DPRINTF((TEXT("Loader: COFF\n")));
     54 }
     55 
     56 CoffLoader::~CoffLoader(void)
     57 {
     58 }
     59 
     60 BOOL
     61 CoffLoader::setFile(File *&file)
     62 {
     63 	Loader::setFile(file);
     64 
     65 	/* read COFF header and check it */
     66 	return read_header();
     67 }
     68 
     69 size_t
     70 CoffLoader::memorySize()
     71 {
     72 	size_t sz = _ah->a_tsize + _ah->a_dsize;
     73 
     74 	DPRINTF((TEXT("file size: text 0x%x + data 0x%x = 0x%x byte\n"),
     75 	    _ah->a_tsize, _ah->a_dsize, sz));
     76 	return sz;
     77 }
     78 
     79 kaddr_t
     80 CoffLoader::jumpAddr()
     81 {
     82 
     83 	DPRINTF((TEXT("kernel entry address: 0x%08x\n"), _ah->a_entry));
     84 
     85 	return _ah->a_entry;
     86 }
     87 
     88 BOOL
     89 CoffLoader::load()
     90 {
     91 	size_t filesz;
     92 	size_t memsz;
     93 	vaddr_t kv;
     94 	off_t fileofs;
     95 
     96 	/* start tag chain */
     97 	_load_segment_start();
     98 
     99 	/* text */
    100 	filesz = memsz = _ah->a_tsize;
    101 	kv = _ah->a_tstart;
    102 	fileofs = COFF_ROUND(N_TXTOFF(_fh, _ah), 16);
    103 	DPRINTF((TEXT("[text]")));
    104 	_load_segment(kv, memsz, fileofs, filesz);
    105 	/* data */
    106 	fileofs += filesz;
    107 	filesz = memsz = _ah->a_dsize;
    108 	kv = _ah->a_dstart;
    109 	DPRINTF((TEXT("[data]")));
    110 	_load_segment(kv, memsz, fileofs, filesz);
    111 	/* bss */
    112 	filesz = 0;
    113 	memsz = _ah->a_bsize;
    114 	kv = _ah->a_dstart + _ah->a_dsize;
    115 	fileofs = 0;
    116 	DPRINTF((TEXT("[bss ]")));
    117 	_load_segment(kv, memsz, fileofs, filesz);
    118 
    119 	/* tag chain still opening */
    120 	return _load_success();
    121 }
    122 
    123 BOOL
    124 CoffLoader::read_header(void)
    125 {
    126 #ifndef COFF_BADMAG
    127 	DPRINTF((TEXT("coff loader not implemented.\n")));
    128 	return FALSE;
    129 #else
    130 	// read COFF header
    131 	_file->read(&_eh, sizeof(struct coff_exechdr), 0);
    132 
    133 	// check COFF Magic.
    134 	if (COFF_BADMAG(_fh)) {
    135 		DPRINTF((TEXT("not a COFF file.\n")));
    136 		return FALSE;
    137 	}
    138 
    139 	return TRUE;
    140 #endif
    141 }
    142