p_djgpp2.h

UPX 源代码

/* p_djgpp2.h --

   This file is part of the UPX executable compressor.

   Copyright (C) 1996-2007 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1996-2007 Laszlo Molnar
   All Rights Reserved.

   UPX and the UCL library are free software; you can redistribute them
   and/or modify them under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2 of
   the License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; see the file COPYING.
   If not, write to the Free Software Foundation, Inc.,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

   Markus F.X.J. Oberhumer   Laszlo Molnar
   [e-mail]      [e-mail]
 */


#ifndef __UPX_P_DJGPP2_H
#define __UPX_P_DJGPP2_H


/*************************************************************************
// djgpp2/coff
**************************************************************************/

class PackDjgpp2 : public Packer
{
    typedef Packer super;

public:
    PackDjgpp2(InputFile *f);
    virtual int getVersion() const { return 14; }
    virtual int getFormat() const { return UPX_F_DJGPP2_COFF; }
    virtual const char *getName() const { return "djgpp2/coff"; }
    virtual const char *getFullName(const options_t *) const { return "i386-dos32.djgpp2.coff"; }
    virtual const int *getCompressionMethods(int method, int level) const;
    virtual const int *getFilters() const;

    virtual void pack(OutputFile *fo);
    virtual void unpack(OutputFile *fo);

    virtual bool canPack();
    virtual int canUnpack();

protected:
    virtual void handleStub(OutputFile *fo);
    virtual int readFileHeader();

    virtual unsigned findOverlapOverhead(const upx_bytep buf,
                                         const upx_bytep tbuf,
                                         unsigned range = 0,
                                         unsigned upper_limit = ~0u) const;
    virtual void buildLoader(const Filter *ft);
    virtual Linker* newLinker() const;

    long coff_offset;

    struct external_scnhdr_t
    {
        char    _[12];    // name, paddr
        LE32    vaddr;
        LE32    size;
        LE32    scnptr;
        char    misc[12]; // relptr, lnnoptr, nreloc, nlnno
        char    __[4];    // flags
    }
    __attribute_packed;

    struct coff_header_t
    {
        // ext_file_hdr
        LE16    f_magic;
        LE16    f_nscns;
        char    _[4];     // f_timdat
        LE32    f_symptr;
        LE32    f_nsyms;
        char    __[2];    // f_opthdr
        LE16    f_flags;

        // aout_hdr
        LE16    a_magic;
        char    ___[2];   // a_vstamp
        LE32    a_tsize;
        LE32    a_dsize;
        char    ____[4];  //  a_bsize
        LE32    a_entry;
        char    _____[8]; // a_text_start a_data_start

        // section headers
        external_scnhdr_t sh[3];
    }
    __attribute_packed;

    coff_header_t coff_hdr;
    external_scnhdr_t *text,*data,*bss;

    void stripDebug();
};


#endif /* already included */


/*
vi:ts=4:et
*/