aout_object.cc revision 2632:1bb2f91485ea 
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
29#include <string>
30
31#include "base/loader/aout_object.hh"
32
33#include "base/loader/symtab.hh"
34
35#include "base/trace.hh"	// for DPRINTF
36
37#include "base/loader/exec_aout.h"
38
39using namespace std;
40
41ObjectFile *
42AoutObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
43{
44    if (!N_BADMAG(*(aout_exechdr *)data)) {
45        // right now this is only used for Alpha PAL code
46        return new AoutObject(fname, fd, len, data,
47                              ObjectFile::Alpha, ObjectFile::UnknownOpSys);
48    }
49    else {
50        return NULL;
51    }
52}
53
54
55AoutObject::AoutObject(const string &_filename, int _fd,
56                       size_t _len, uint8_t *_data,
57                       Arch _arch, OpSys _opSys)
58    : ObjectFile(_filename, _fd, _len, _data, _arch, _opSys)
59{
60    execHdr = (aout_exechdr *)fileData;
61
62    entry = execHdr->entry;
63
64    text.baseAddr = N_TXTADDR(*execHdr);
65    text.size = execHdr->tsize;
66    text.fileImage = fileData + N_TXTOFF(*execHdr);
67
68    data.baseAddr = N_DATADDR(*execHdr);
69    data.size = execHdr->dsize;
70    data.fileImage = fileData + N_DATOFF(*execHdr);
71
72    bss.baseAddr = N_BSSADDR(*execHdr);
73    bss.size = execHdr->bsize;
74    bss.fileImage = NULL;
75
76    DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n",
77             text.baseAddr, text.size, data.baseAddr, data.size,
78             bss.baseAddr, bss.size);
79}
80
81
82bool
83AoutObject::loadGlobalSymbols(SymbolTable *symtab)
84{
85    // a.out symbols not supported yet
86    return false;
87}
88
89bool
90AoutObject::loadLocalSymbols(SymbolTable *symtab)
91{
92    // a.out symbols not supported yet
93    return false;
94}
95