/* p_vmlinx.h --

   This file is part of the UPX executable compressor.

   Copyright (C) Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 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
   <markus@oberhumer.com>               <ezerotven+github@gmail.com>
 */


#pragma once
#ifndef __UPX_P_VMLINX_H
#define __UPX_P_VMLINX_H 1

#include "p_elf.h"


/*************************************************************************
// vmlinx/i386 (bare binary Linux kernel image)
**************************************************************************/

template <class TElfClass>
class PackVmlinuxBase : public Packer
{
    typedef Packer super;
protected:
    typedef TElfClass ElfClass;
    typedef typename ElfClass::BeLePolicy BeLePolicy;
    typedef typename ElfClass::ElfITypes  ElfITypes;
    // integral types
    typedef typename ElfClass::TE16  TE16;
    typedef typename ElfClass::TE32  TE32;
    typedef typename ElfClass::TE64  TE64;
    typedef typename ElfITypes::Addr Addr;
    // ELF types
    typedef typename ElfClass::Ehdr Ehdr;
    typedef typename ElfClass::Shdr Shdr;
    typedef typename ElfClass::Phdr Phdr;
    typedef typename ElfClass::Dyn  Dyn;
    typedef typename ElfClass::Sym  Sym;

public:
    PackVmlinuxBase(InputFile *, unsigned, unsigned, unsigned, char const *);
    virtual ~PackVmlinuxBase();
    virtual int getVersion() const override { return 13; }

protected:
    unsigned int const my_e_machine;
    unsigned char const my_elfclass;
    unsigned char const my_elfdata;
    char const *const my_boot_label;

    int n_ptload;
    unsigned sz_ptload;
    unsigned paddr_min;
    Phdr *phdri; // from input file
    Shdr *shdri; // from input file
    char *shstrtab; // from input file
    Shdr *p_text;
    Shdr *p_note0;
    Shdr *p_note1;
    Ehdr ehdri; // from input file

    virtual Shdr const *getElfSections();
    virtual int getStrategy(Filter &/*ft*/);
    virtual bool is_valid_e_entry(Addr) = 0;
    virtual bool has_valid_vmlinux_head() = 0;
    virtual tribool canPack() override;
    virtual void pack(OutputFile *fo) override;
    virtual tribool canUnpack() override;  // bool, except -1: format known, but not packed
    virtual void unpack(OutputFile *fo) override;
    virtual unsigned write_vmlinux_head(
        OutputFile *fo,
        Shdr *stxt
    ) = 0;
    static int __acc_cdecl_qsort compare_Phdr(void const *aa, void const *bb);
};


class PackVmlinuxI386 : public PackVmlinuxBase<ElfClass_LE32>
{
    typedef PackVmlinuxBase<ElfClass_LE32> super;
public:
    PackVmlinuxI386(InputFile *f) : super(f, Ehdr::EM_386,
        Ehdr::ELFCLASS32, Ehdr::ELFDATA2LSB, "startup_32") { }
    virtual int getFormat() const override { return UPX_F_VMLINUX_i386; }
    virtual const char *getName() const override { return "vmlinux/i386"; }
    virtual const char *getFullName(const options_t *) const override { return "i386-linux.kernel.vmlinux"; }
    virtual const int *getCompressionMethods(int method, int level) const override;
    virtual const int *getFilters() const override;

protected:
    virtual void buildLoader(const Filter *ft) override;
    virtual void defineDecompressorSymbols() override;
    virtual Linker* newLinker() const override;
    virtual bool is_valid_e_entry(Addr) override;
    virtual bool has_valid_vmlinux_head() override;
    virtual unsigned write_vmlinux_head(
        OutputFile *fo,
        Shdr *stxt
    ) override;
};


class PackVmlinuxARMEL : public PackVmlinuxBase<ElfClass_LE32>
{
    typedef PackVmlinuxBase<ElfClass_LE32> super;
public:
    PackVmlinuxARMEL(InputFile *f) : super(f, Ehdr::EM_ARM,
        Ehdr::ELFCLASS32, Ehdr::ELFDATA2LSB, "decompress_kernel") { }
    virtual int getFormat() const override { return UPX_F_VMLINUX_ARM; }
    virtual const char *getName() const override { return "vmlinux/arm"; }
    virtual const char *getFullName(const options_t *) const override { return "arm-linux.kernel.vmlinux"; }
    virtual const int *getCompressionMethods(int method, int level) const override;
    virtual const int *getFilters() const override;

protected:
    virtual void buildLoader(const Filter *ft) override;
    virtual void defineDecompressorSymbols() override;
    virtual Linker* newLinker() const override;
    virtual bool is_valid_e_entry(Addr) override;
    virtual bool has_valid_vmlinux_head() override;
    virtual unsigned write_vmlinux_head(
        OutputFile *fo,
        Shdr *stxt
    ) override;
};

class PackVmlinuxARMEB : public PackVmlinuxBase<ElfClass_BE32>
{
    typedef PackVmlinuxBase<ElfClass_BE32> super;
public:
    PackVmlinuxARMEB(InputFile *f) : super(f, Ehdr::EM_ARM,
        Ehdr::ELFCLASS32, Ehdr::ELFDATA2MSB, "decompress_kernel") { }
    virtual int getFormat() const override { return UPX_F_VMLINUX_ARMEB; }
    virtual const char *getName() const override { return "vmlinux/armeb"; }
    virtual const char *getFullName(const options_t *) const override { return "armeb-linux.kernel.vmlinux"; }
    virtual const int *getCompressionMethods(int method, int level) const override;
    virtual const int *getFilters() const override;

protected:
    virtual void buildLoader(const Filter *ft) override;
    virtual void defineDecompressorSymbols() override;
    virtual Linker* newLinker() const override;
    virtual bool is_valid_e_entry(Addr) override;
    virtual bool has_valid_vmlinux_head() override;
    virtual unsigned write_vmlinux_head(
        OutputFile *fo,
        Shdr *stxt
    ) override;
};

class PackVmlinuxPPC32 : public PackVmlinuxBase<ElfClass_BE32>
{
    typedef PackVmlinuxBase<ElfClass_BE32> super;
public:
    PackVmlinuxPPC32(InputFile *f) : super(f, Ehdr::EM_PPC,
        Ehdr::ELFCLASS32, Ehdr::ELFDATA2MSB, "_vmlinux_start") { }
    virtual int getFormat() const override { return UPX_F_VMLINUX_PPC32; }
    virtual const char *getName() const override { return "vmlinux/ppc32"; }
    virtual const char *getFullName(const options_t *) const override { return "powerpc-linux.kernel.vmlinux"; }
    virtual const int *getCompressionMethods(int method, int level) const override;
    virtual const int *getFilters() const override;

protected:
    virtual void buildLoader(const Filter *ft) override;
    virtual void defineDecompressorSymbols() override;
    virtual Linker* newLinker() const override;
    virtual bool is_valid_e_entry(Addr) override;
    virtual bool has_valid_vmlinux_head() override;
    virtual unsigned write_vmlinux_head(
        OutputFile *fo,
        Shdr *stxt
    ) override;
};

class PackVmlinuxPPC64LE : public PackVmlinuxBase<ElfClass_LE64>
{
    typedef PackVmlinuxBase<ElfClass_LE64> super;
public:
    PackVmlinuxPPC64LE(InputFile *f) : super(f, Ehdr::EM_PPC64,
        Ehdr::ELFCLASS64, Ehdr::ELFDATA2LSB, "_vmlinux_start") { }
    virtual int getFormat() const override { return UPX_F_VMLINUX_PPC64LE; }
    virtual const char *getName() const override { return "vmlinux/ppc64le"; }
    virtual const char *getFullName(const options_t *) const override { return "powerpc64le-linux.kernel.vmlinux"; }
    virtual const int *getCompressionMethods(int method, int level) const override;
    virtual const int *getFilters() const override;

protected:
    virtual void buildLoader(const Filter *ft) override;
    virtual void defineDecompressorSymbols() override;
    virtual Linker* newLinker() const override;
    virtual bool is_valid_e_entry(Addr) override;
    virtual bool has_valid_vmlinux_head() override;
    virtual unsigned write_vmlinux_head(
        OutputFile *fo,
        Shdr *stxt
    ) override;
};


class PackVmlinuxAMD64 : public PackVmlinuxBase<ElfClass_LE64>
{
    typedef PackVmlinuxBase<ElfClass_LE64> super;
public:
    PackVmlinuxAMD64(InputFile *f) : super(f, Ehdr::EM_X86_64,
        Ehdr::ELFCLASS64, Ehdr::ELFDATA2LSB, "startup_32") { }
    virtual int getFormat() const override { return UPX_F_VMLINUX_AMD64; }
    virtual const char *getName() const override { return "vmlinux/amd64"; }
    virtual const char *getFullName(const options_t *) const override { return "amd64-linux.kernel.vmlinux"; }
    virtual const int *getCompressionMethods(int method, int level) const override;
    virtual const int *getFilters() const override;

protected:
    virtual void buildLoader(const Filter *ft) override;
    virtual void defineDecompressorSymbols() override;
    virtual Linker* newLinker() const override;
    virtual bool is_valid_e_entry(Addr) override;
    virtual bool has_valid_vmlinux_head() override;
    virtual unsigned write_vmlinux_head(
        OutputFile *fo,
        Shdr *stxt
    ) override;
};


#endif /* already included */

/* vim:set ts=4 sw=4 et: */
