object_file.hh revision 2632:1bb2f91485ea 
1/*
2 * Copyright (c) 2002-2004 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#ifndef __OBJECT_FILE_HH__
30#define __OBJECT_FILE_HH__
31
32#include <limits>
33#include <string>
34
35#include "sim/host.hh"	// for Addr
36
37class Port;
38class SymbolTable;
39
40class ObjectFile
41{
42  public:
43
44    enum Arch {
45        UnknownArch,
46        Alpha,
47        SPARC,
48        Mips
49    };
50
51    enum OpSys {
52        UnknownOpSys,
53        Tru64,
54        Linux,
55        Solaris
56    };
57
58  protected:
59    const std::string filename;
60    int descriptor;
61    uint8_t *fileData;
62    size_t len;
63
64    Arch  arch;
65    OpSys opSys;
66
67    ObjectFile(const std::string &_filename, int _fd,
68               size_t _len, uint8_t *_data,
69               Arch _arch, OpSys _opSys);
70
71  public:
72    virtual ~ObjectFile();
73
74    void close();
75
76    virtual bool loadSections(Port *memPort, Addr addrMask =
77            std::numeric_limits<Addr>::max());
78    virtual bool loadGlobalSymbols(SymbolTable *symtab) = 0;
79    virtual bool loadLocalSymbols(SymbolTable *symtab) = 0;
80
81    Arch  getArch()  const { return arch; }
82    OpSys getOpSys() const { return opSys; }
83
84  protected:
85
86    struct Section {
87        Addr     baseAddr;
88        uint8_t *fileImage;
89        size_t   size;
90    };
91
92    Addr entry;
93    Addr globalPtr;
94
95    Section text;
96    Section data;
97    Section bss;
98
99    bool loadSection(Section *sec, Port *memPort, Addr addrMask);
100    void setGlobalPointer(Addr global_ptr) { globalPtr = global_ptr; }
101
102  public:
103    Addr entryPoint() const { return entry; }
104
105    Addr globalPointer() const { return globalPtr; }
106
107    Addr textBase() const { return text.baseAddr; }
108    Addr dataBase() const { return data.baseAddr; }
109    Addr bssBase() const { return bss.baseAddr; }
110
111    size_t textSize() const { return text.size; }
112    size_t dataSize() const { return data.size; }
113    size_t bssSize() const { return bss.size; }
114};
115
116ObjectFile *createObjectFile(const std::string &fname);
117
118
119#endif // __OBJECT_FILE_HH__
120