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https://github.com/upx/upx
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bd67677389
... and cleanup PackDjgpp2::readFileHeader() https://github.com/upx/upx/issues/881 modified: p_djgpp2.cpp modified: p_djgpp2.h
116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
/* p_djgpp2.h --
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This file is part of the UPX executable compressor.
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Copyright (C) 1996-2025 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 1996-2025 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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// djgpp2/coff
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**************************************************************************/
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class PackDjgpp2 final : public Packer {
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typedef Packer super;
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public:
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explicit PackDjgpp2(InputFile *f);
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virtual int getVersion() const override { return 14; }
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virtual int getFormat() const override { return UPX_F_DJGPP2_COFF; }
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virtual const char *getName() const override { return "djgpp2/coff"; }
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virtual const char *getFullName(const Options *) const override {
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return "i386-dos32.djgpp2.coff";
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}
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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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protected:
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void handleStub(OutputFile *fo);
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int readFileHeader();
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virtual unsigned findOverlapOverhead(const byte *buf, const byte *tbuf, unsigned range = 0,
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unsigned upper_limit = ~0u) const override;
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virtual void buildLoader(const Filter *ft) override;
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virtual Linker *newLinker() const override;
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unsigned coff_offset;
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// based on https://dox.ipxe.org/PeImage_8h_source.html
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struct alignas(1) dos_header_t {
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LE16 e_magic;
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LE16 e_cblp; // Bytes on last page of file
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LE16 e_cp; // Pages in file
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LE16 e_crlc; // Relocations
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LE16 e_cparhdr; // Size of header in paragraphs
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LE16 e_OMITTED[32 - 5 * 2];
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}; // 64 bytes
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struct alignas(1) external_scnhdr_t {
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byte _[12]; // name, paddr
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LE32 vaddr;
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LE32 size;
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LE32 scnptr;
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byte misc[12]; // relptr, lnnoptr, nreloc, nlnno
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byte __[4]; // flags
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};
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struct alignas(1) coff_header_t {
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// ext_file_hdr
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LE16 f_magic;
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LE16 f_nscns;
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byte _[4]; // f_timdat
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LE32 f_symptr;
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LE32 f_nsyms;
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byte __[2]; // f_opthdr
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LE16 f_flags;
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// aout_hdr
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LE16 a_magic;
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byte ___[2]; // a_vstamp
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LE32 a_tsize;
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LE32 a_dsize;
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byte ____[4]; // a_bsize
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LE32 a_entry;
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byte _____[8]; // a_text_start a_data_start
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// section headers
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external_scnhdr_t sh[3];
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};
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coff_header_t coff_hdr;
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external_scnhdr_t *text = nullptr;
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external_scnhdr_t *data = nullptr;
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external_scnhdr_t *bss = nullptr;
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void stripDebug();
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};
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/* vim:set ts=4 sw=4 et: */
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