mirror of
https://github.com/upx/upx
synced 2025-09-28 19:06:07 +08:00
664a82e7c9
with Big endian and Little endian derived from it. I386 still uses the old way, but PowerPC (both Linux and Darwin [Mac]) use the new way. p_elf.h p_lx_elf.cpp p_lx_elf.h p_lx_exc.cpp p_lx_exc.h p_unix.cpp p_unix.h p_vmlinx.cpp p_vmlinx.h p_vmlinz.cpp committer: jreiser <jreiser> 1108940224 +0000
246 lines
7.5 KiB
C++
246 lines
7.5 KiB
C++
/* p_unix.h --
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This file is part of the UPX executable compressor.
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Copyright (C) 1996-2004 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 1996-2004 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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<mfx@users.sourceforge.net> <ml1050@users.sourceforge.net>
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*/
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#ifndef __UPX_P_UNIX_H
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#define __UPX_P_UNIX_H
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/*************************************************************************
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// Abstract class for all Unix-type packers.
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// Already provides most of the functionality.
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**************************************************************************/
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class PackUnix : public Packer
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{
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typedef Packer super;
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protected:
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PackUnix(InputFile *f);
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public:
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virtual int getVersion() const { return 13; }
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virtual const int *getFilters() const { return NULL; }
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virtual int getStrategy(Filter &);
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virtual void pack(OutputFile *fo);
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virtual void unpack(OutputFile *fo);
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virtual bool canPack();
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virtual int canUnpack();
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protected:
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// called by the generic pack()
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virtual void pack1(OutputFile *, Filter &); // generate executable header
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virtual void pack2(OutputFile *, Filter &); // append compressed data
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virtual void pack3(OutputFile *, Filter &); // append loader
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virtual void pack4(OutputFile *, Filter &); // append PackHeader
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virtual void patchLoader() = 0;
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virtual void patchLoaderChecksum();
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virtual void updateLoader(OutputFile *) = 0;
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virtual void writePackHeader(OutputFile *fo);
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// in order too share as much code as possible we introduce
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// an endian abstraction here
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virtual unsigned get_native32(const void *) const = 0;
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virtual unsigned get_native16(const void *) const = 0;
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virtual void set_native32(void *, unsigned) const = 0;
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virtual void set_native16(void *, unsigned) const = 0;
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virtual bool checkCompressionRatio(unsigned, unsigned) const;
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protected:
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struct Extent {
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off_t offset;
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off_t size;
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};
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virtual void packExtent(const Extent &x,
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unsigned &total_in, unsigned &total_out, Filter *, OutputFile *);
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virtual void unpackExtent(unsigned wanted, OutputFile *fo,
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unsigned &total_in, unsigned &total_out,
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unsigned &c_adler, unsigned &u_adler,
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bool first_PF_X, unsigned szb_info );
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int exetype;
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unsigned blocksize;
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unsigned progid; // program id
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unsigned overlay_offset; // used when decompressing
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MemBuffer loader;
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int lsize;
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MemBuffer pt_dynamic;
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int sz_dynamic;
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unsigned b_len; // total length of b_info blocks
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// must agree with stub/linux.hh
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struct b_info { // 12-byte header before each compressed block
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unsigned sz_unc; // uncompressed_size
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unsigned sz_cpr; // compressed_size
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unsigned char b_method; // compression algorithm
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unsigned char b_ftid; // filter id
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unsigned char b_cto8; // filter parameter
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unsigned char b_unused;
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}
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__attribute_packed;
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struct l_info { // 12-byte trailer in header for loader
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unsigned l_checksum;
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unsigned l_magic;
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unsigned short l_lsize;
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unsigned char l_version;
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unsigned char l_format;
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}
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__attribute_packed;
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struct p_info { // 12-byte packed program header
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unsigned p_progid;
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unsigned p_filesize;
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unsigned p_blocksize;
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}
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__attribute_packed;
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struct l_info linfo;
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// do not change !!!
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enum { OVERHEAD = 2048 };
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};
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/*************************************************************************
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// abstract classes encapsulating endian issues
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// note: UPX_MAGIC is always stored in le32 format
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**************************************************************************/
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class PackUnixBe32 : public PackUnix
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{
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typedef PackUnix super;
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protected:
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PackUnixBe32(InputFile *f) : super(f) { }
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virtual unsigned get_native32(const void *b) const { return get_be32(b); }
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virtual unsigned get_native16(const void *b) const { return get_be16(b); }
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virtual void set_native32(void *b, unsigned v) const { set_be32(b, v); }
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virtual void set_native16(void *b, unsigned v) const { set_be16(b, v); }
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// must agree with stub/linux.hh
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struct b_info { // 12-byte header before each compressed block
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BE32 sz_unc; // uncompressed_size
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BE32 sz_cpr; // compressed_size
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unsigned char b_method; // compression algorithm
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unsigned char b_ftid; // filter id
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unsigned char b_cto8; // filter parameter
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unsigned char b_unused;
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}
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__attribute_packed;
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struct l_info { // 12-byte trailer in header for loader
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BE32 l_checksum;
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BE32 l_magic;
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BE16 l_lsize;
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unsigned char l_version;
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unsigned char l_format;
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}
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__attribute_packed;
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struct p_info { // 12-byte packed program header
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BE32 p_progid;
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BE32 p_filesize;
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BE32 p_blocksize;
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}
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__attribute_packed;
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};
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class PackUnixLe32 : public PackUnix
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{
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typedef PackUnix super;
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protected:
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PackUnixLe32(InputFile *f) : super(f) { }
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virtual unsigned get_native32(const void *b) const { return get_le32(b); }
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virtual unsigned get_native16(const void *b) const { return get_le16(b); }
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virtual void set_native32(void *b, unsigned v) const { set_le32(b, v); }
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virtual void set_native16(void *b, unsigned v) const { set_le16(b, v); }
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// must agree with stub/linux.hh
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struct b_info { // 12-byte header before each compressed block
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LE32 sz_unc; // uncompressed_size
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LE32 sz_cpr; // compressed_size
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unsigned char b_method; // compression algorithm
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unsigned char b_ftid; // filter id
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unsigned char b_cto8; // filter parameter
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unsigned char b_unused;
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}
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__attribute_packed;
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struct l_info { // 12-byte trailer in header for loader
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LE32 l_checksum;
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LE32 l_magic;
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LE16 l_lsize;
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unsigned char l_version;
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unsigned char l_format;
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}
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__attribute_packed;
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struct p_info { // 12-byte packed program header
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LE32 p_progid;
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LE32 p_filesize;
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LE32 p_blocksize;
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}
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__attribute_packed;
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};
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/*************************************************************************
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// solaris/sparc
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**************************************************************************/
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#if 0
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class PackSolarisSparc : public PackUnixBe32
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{
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typedef PackUnixBe32 super;
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public:
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PackSolarisSparc(InputFile *f) : super(f) { }
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virtual int getFormat() const { return UPX_F_SOLARIS_SPARC; }
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virtual const char *getName() const { return "solaris/sparc"; }
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virtual bool canPack();
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protected:
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virtual const upx_byte *getLoader() const;
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virtual int getLoaderSize() const;
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virtual void patchLoader();
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};
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#endif /* #if 0 */
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#endif /* already included */
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/*
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vi:ts=4:et
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*/
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