Home | History | Annotate | Line # | Download | only in hpcboot
load_coff.cpp revision 1.2 
      1 /*	$NetBSD: load_coff.cpp,v 1.2 2001/05/08 18:51:23 uch 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 	DPRINTF((TEXT("kernel entry address: 0x%08x\n"), _ah->a_entry));
     83 	return _ah->a_entry;
     84 }
     85 
     86 BOOL
     87 CoffLoader::load()
     88 {
     89 	size_t filesz;
     90 	size_t memsz;
     91 	vaddr_t kv;
     92 	off_t fileofs;
     93 
     94 	/* start tag chain */
     95 	_load_segment_start();
     96 
     97 	/* text */
     98 	filesz = memsz = _ah->a_tsize;
     99 	kv = _ah->a_tstart;
    100 	fileofs = COFF_ROUND(N_TXTOFF(_fh, _ah), 16);
    101 	DPRINTF((TEXT("[text]")));
    102 	_load_segment(kv, memsz, fileofs, filesz);
    103 	/* data */
    104 	fileofs += filesz;
    105 	filesz = memsz = _ah->a_dsize;
    106 	kv = _ah->a_dstart;
    107 	DPRINTF((TEXT("[data]")));
    108 	_load_segment(kv, memsz, fileofs, filesz);
    109 	/* bss */
    110 	filesz = 0;
    111 	memsz = _ah->a_bsize;
    112 	kv = _ah->a_dstart + _ah->a_dsize;
    113 	fileofs = 0;
    114 	DPRINTF((TEXT("[bss ]")));
    115 	_load_segment(kv, memsz, fileofs, filesz);
    116 
    117 	/* tag chain still opening */
    118 
    119 	return TRUE;
    120 }
    121 
    122 BOOL
    123 CoffLoader::read_header(void)
    124 {
    125 #ifndef COFF_BADMAG
    126 	DPRINTF((TEXT("coff loader not implemented.\n")));
    127 	return FALSE;
    128 #else
    129 	// read COFF header
    130 	_file->read(&_eh, sizeof(struct coff_exechdr), 0);
    131 
    132 	// check COFF Magic.
    133 	if (COFF_BADMAG(_fh)) {
    134 		DPRINTF((TEXT("not a COFF file.\n")));
    135 		return FALSE;
    136 	}
    137 
    138 	return TRUE;
    139 #endif
    140 }
    141