base/object_file.hh

   1 /*
   2  * Copyright (c) 2003 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 "isa_traits.hh"        // for Addr
  33
  34 class FunctionalMemory;
  35 class SymbolTable;
  36
  37 class ObjectFile
  38 {
  39   protected:
  40     const std::string filename;
  41     int descriptor;
  42     uint8_t *fileData;
  43     size_t len;
  44
  45     ObjectFile(const std::string &_filename, int _fd,
  46                size_t _len, uint8_t *_data);
  47
  48   public:
  49     virtual ~ObjectFile();
  50
  51     void close();
  52
  53     virtual bool loadSections(FunctionalMemory *mem,
  54                               bool loadPhys = false) = 0;
  55     virtual bool loadGlobalSymbols(SymbolTable *symtab) = 0;
  56     virtual bool loadLocalSymbols(SymbolTable *symtab) = 0;
  57
  58   protected:
  59
  60     struct Section {
  61         Addr baseAddr;
  62         size_t size;
  63     };
  64
  65     Addr entry;
  66     Addr globalPtr;
  67
  68     Section text;
  69     Section data;
  70     Section bss;
  71
  72   public:
  73     Addr entryPoint() const { return entry; }
  74     Addr globalPointer() const { return globalPtr; }
  75
  76     Addr textBase() const { return text.baseAddr; }
  77     Addr dataBase() const { return data.baseAddr; }
  78     Addr bssBase() const { return bss.baseAddr; }
  79
  80     size_t textSize() const { return text.size; }
  81     size_t dataSize() const { return data.size; }
  82     size_t bssSize() const { return bss.size; }
  83 };
  84
  85 ObjectFile *createObjectFile(const std::string &fname);
  86
  87
  88 #endif // __OBJECT_FILE_HH__