mirror of
https://github.com/upx/upx
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106 lines
3.3 KiB
C++
106 lines
3.3 KiB
C++
/* p_exe.h -- dos/exe executable format
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This file is part of the UPX executable compressor.
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Copyright (C) 1996-2023 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 1996-2023 Laszlo Molnar
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All Rights Reserved.
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UPX and the UCL library are free software; you can redistribute them
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and/or modify them under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING.
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If not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Markus F.X.J. Oberhumer Laszlo Molnar
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<markus@oberhumer.com> <ezerotven+github@gmail.com>
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*/
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#pragma once
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/*************************************************************************
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// dos/exe
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**************************************************************************/
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class PackExe final : public Packer {
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typedef Packer super;
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public:
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explicit PackExe(InputFile *f);
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virtual int getVersion() const override { return 13; }
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virtual int getFormat() const override { return UPX_F_DOS_EXE; }
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virtual const char *getName() const override { return "dos/exe"; }
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virtual const char *getFullName(const Options *) const override { return "i086-dos16.exe"; }
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virtual const int *getCompressionMethods(int method, int level) const override;
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virtual const int *getFilters() const override;
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virtual void pack(OutputFile *fo) override;
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virtual void unpack(OutputFile *fo) override;
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virtual tribool canPack() override;
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virtual tribool canUnpack() override;
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// unpacker capabilities
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virtual bool canUnpackVersion(int version) const override {
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// NOTE: could adapt p_exe.cpp to support (version >= 8)
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return (version >= 10);
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}
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virtual bool canUnpackFormat(int format) const override {
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return (format == UPX_F_DOS_EXE || format == UPX_F_DOS_EXEH);
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}
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protected:
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struct exe_header_t;
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int readFileHeader(void);
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int fillExeHeader(struct exe_header_t *) const;
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virtual void buildLoader(const Filter *ft) override;
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virtual Linker *newLinker() const override;
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void addLoaderEpilogue(int flag);
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struct alignas(1) exe_header_t {
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LE16 ident;
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LE16 m512;
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LE16 p512;
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LE16 relocs;
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LE16 headsize16;
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LE16 min;
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LE16 max;
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LE16 ss;
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LE16 sp;
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byte _[2]; // checksum
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LE16 ip;
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LE16 cs;
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LE16 relocoffs;
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byte __[2]; // overlnum
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LE32 firstreloc;
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};
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exe_header_t ih, oh;
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unsigned ih_exesize = 0;
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unsigned ih_imagesize = 0;
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unsigned ih_overlay = 0;
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unsigned relocsize = 0;
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bool has_9a = false;
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bool device_driver = false;
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enum { NORELOC = 1, USEJUMP = 2, SS = 4, SP = 8, MINMEM = 16, MAXMEM = 32 };
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unsigned stack_for_lzma = 0; // stack size required for lzma
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bool use_clear_dirty_stack = false;
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};
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/* vim:set ts=4 sw=4 et: */
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