src/base/loader/aout_object.cc

/*
 * Copyright (c) 2003-2005 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Steve Reinhardt
 */

#include "base/loader/aout_object.hh"

#include <string>

#include "base/loader/exec_aout.h"
#include "base/loader/symtab.hh"
#include "base/trace.hh"
#include "debug/Loader.hh"

using namespace std;

ObjectFile *
AoutObjectFileFormat::load(ImageFileDataPtr ifd)
{
    if (!N_BADMAG(*(const aout_exechdr *)ifd->data()))
        return new AoutObject(ifd);
    else
        return nullptr;
}

namespace
{

AoutObjectFileFormat aoutObjectFileFormat;

} // anonymous namespace


AoutObject::AoutObject(ImageFileDataPtr ifd) : ObjectFile(ifd)
{
    execHdr = (const aout_exechdr *)imageData->data();
    entry = execHdr->entry;

    // Right now this is only used for Alpha PAL code.
    arch = Alpha;
}

MemoryImage
AoutObject::buildImage() const
{
    MemoryImage image({
            MemoryImage::Segment{ "text", N_TXTADDR(*execHdr), imageData,
              N_TXTOFF(*execHdr), execHdr->tsize },
            MemoryImage::Segment{ "data", N_DATADDR(*execHdr), imageData,
              N_DATOFF(*execHdr), execHdr->dsize },
            MemoryImage::Segment{ "bss", N_BSSADDR(*execHdr), execHdr->bsize}
    });

    for (auto M5_VAR_USED &seg: image.segments())
        DPRINTFR(Loader, "%s\n", seg);

    return image;
}