src/base/loader/aout_object.cc

   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
  41 using namespace std;
  42
  43 ObjectFile *
  44 AoutObject::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
  57 AoutObject::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
  84 bool
  85 AoutObject::loadGlobalSymbols(SymbolTable *symtab, Addr addrMask)
  86 {
  87     // a.out symbols not supported yet
  88     return false;
  89 }
  90
  91 bool
  92 AoutObject::loadLocalSymbols(SymbolTable *symtab, Addr addrMask)
  93 {
  94     // a.out symbols not supported yet
  95     return false;
  96 }