aout_object.cc revision 2665:a124942bacb8 
1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Steve Reinhardt
29 */
30
31#include <string>
32
33#include "base/loader/aout_object.hh"
34
35#include "base/loader/symtab.hh"
36
37#include "base/trace.hh"	// for DPRINTF
38
39#include "base/loader/exec_aout.h"
40
41using namespace std;
42
43ObjectFile *
44AoutObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
45{
46    if (!N_BADMAG(*(aout_exechdr *)data)) {
47        // right now this is only used for Alpha PAL code
48        return new AoutObject(fname, fd, len, data,
49                              ObjectFile::Alpha, ObjectFile::UnknownOpSys);
50    }
51    else {
52        return NULL;
53    }
54}
55
56
57AoutObject::AoutObject(const string &_filename, int _fd,
58                       size_t _len, uint8_t *_data,
59                       Arch _arch, OpSys _opSys)
60    : ObjectFile(_filename, _fd, _len, _data, _arch, _opSys)
61{
62    execHdr = (aout_exechdr *)fileData;
63
64    entry = execHdr->entry;
65
66    text.baseAddr = N_TXTADDR(*execHdr);
67    text.size = execHdr->tsize;
68    text.fileImage = fileData + N_TXTOFF(*execHdr);
69
70    data.baseAddr = N_DATADDR(*execHdr);
71    data.size = execHdr->dsize;
72    data.fileImage = fileData + N_DATOFF(*execHdr);
73
74    bss.baseAddr = N_BSSADDR(*execHdr);
75    bss.size = execHdr->bsize;
76    bss.fileImage = NULL;
77
78    DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n",
79             text.baseAddr, text.size, data.baseAddr, data.size,
80             bss.baseAddr, bss.size);
81}
82
83
84bool
85AoutObject::loadGlobalSymbols(SymbolTable *symtab)
86{
87    // a.out symbols not supported yet
88    return false;
89}
90
91bool
92AoutObject::loadLocalSymbols(SymbolTable *symtab)
93{
94    // a.out symbols not supported yet
95    return false;
96}
97