aout_object.cc

来自「M5,一个功能强大的多处理器系统模拟器.很多针对处理器架构,性能的研究都使用它作」· CC 代码 · 共 97 行

/*
 * Copyright (c) 2003, 2004, 2005
 * The Regents of The University of Michigan
 * All Rights Reserved
 *
 * This code is part of the M5 simulator.
 *
 * Permission is granted to use, copy, create derivative works and
 * redistribute this software and such derivative works for any
 * purpose, so long as the copyright notice above, this grant of
 * permission, and the disclaimer below appear in all copies made; and
 * so long as the name of The University of Michigan is not used in
 * any advertising or publicity pertaining to the use or distribution
 * of this software without specific, written prior authorization.
 *
 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE
 * UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND
 * WITHOUT WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE. THE REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE
 * LIABLE FOR ANY DAMAGES, INCLUDING DIRECT, SPECIAL, INDIRECT,
 * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN
 * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGES.
 *
 * Authors: Steven K. Reinhardt
 */

#include <string>

#include "base/loader/aout_object.hh"

#include "base/loader/symtab.hh"

#include "base/trace.hh"	// for DPRINTF

#include "base/loader/exec_aout.h"

using namespace std;

ObjectFile *
AoutObject::tryFile(const string &fname, int fd, size_t len, uint8_t *data)
{
    if (!N_BADMAG(*(aout_exechdr *)data)) {
        // right now this is only used for Alpha PAL code
        return new AoutObject(fname, fd, len, data,
                              ObjectFile::Alpha, ObjectFile::UnknownOpSys);
    }
    else {
        return NULL;
    }
}


AoutObject::AoutObject(const string &_filename, int _fd,
                       size_t _len, uint8_t *_data,
                       Arch _arch, OpSys _opSys)
    : ObjectFile(_filename, _fd, _len, _data, _arch, _opSys)
{
    execHdr = (aout_exechdr *)fileData;

    entry = execHdr->entry;

    text.baseAddr = N_TXTADDR(*execHdr);
    text.size = execHdr->tsize;
    text.fileImage = fileData + N_TXTOFF(*execHdr);

    data.baseAddr = N_DATADDR(*execHdr);
    data.size = execHdr->dsize;
    data.fileImage = fileData + N_DATOFF(*execHdr);

    bss.baseAddr = N_BSSADDR(*execHdr);
    bss.size = execHdr->bsize;
    bss.fileImage = NULL;

    DPRINTFR(Loader, "text: 0x%x %d\ndata: 0x%x %d\nbss: 0x%x %d\n",
             text.baseAddr, text.size, data.baseAddr, data.size,
             bss.baseAddr, bss.size);
}


bool
AoutObject::loadGlobalSymbols(SymbolTable *symtab, Addr addrMask)
{
    // a.out symbols not supported yet
    return false;
}

bool
AoutObject::loadLocalSymbols(SymbolTable *symtab, Addr addrMask)
{
    // a.out symbols not supported yet
    return false;
}