aout_object.cc revision 7676:92274350b953 
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#include "base/loader/symtab.hh"
35#include "base/trace.hh"
36#include "base/loader/exec_aout.h"
37
38using namespace std;
39
40ObjectFile *
41AoutObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
42{
43    if (!N_BADMAG(*(aout_exechdr *)data)) {
44        // right now this is only used for Alpha PAL code
45        return new AoutObject(fname, fd, len, data,
46                              ObjectFile::Alpha, ObjectFile::UnknownOpSys);
47    }
48    else {
49        return NULL;
50    }
51}
52
53
54AoutObject::AoutObject(const string &_filename, int _fd,
55                       size_t _len, uint8_t *_data,
56                       Arch _arch, OpSys _opSys)
57    : ObjectFile(_filename, _fd, _len, _data, _arch, _opSys)
58{
59    execHdr = (aout_exechdr *)fileData;
60
61    entry = execHdr->entry;
62
63    text.baseAddr = N_TXTADDR(*execHdr);
64    text.size = execHdr->tsize;
65    text.fileImage = fileData + N_TXTOFF(*execHdr);
66
67    data.baseAddr = N_DATADDR(*execHdr);
68    data.size = execHdr->dsize;
69    data.fileImage = fileData + N_DATOFF(*execHdr);
70
71    bss.baseAddr = N_BSSADDR(*execHdr);
72    bss.size = execHdr->bsize;
73    bss.fileImage = NULL;
74
75    DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n",
76             text.baseAddr, text.size, data.baseAddr, data.size,
77             bss.baseAddr, bss.size);
78}
79
80
81bool
82AoutObject::loadGlobalSymbols(SymbolTable *symtab, Addr addrMask)
83{
84    // a.out symbols not supported yet
85    return false;
86}
87
88bool
89AoutObject::loadLocalSymbols(SymbolTable *symtab, Addr addrMask)
90{
91    // a.out symbols not supported yet
92    return false;
93}
94