123 lines
5.1 KiB
C++
123 lines
5.1 KiB
C++
/*************************************************************************/
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/* Copyright (c) 2015 dx, http://kaimi.ru */
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/* */
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/* Permission is hereby granted, free of charge, to any person */
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/* obtaining a copy of this software and associated documentation */
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/* files (the "Software"), to deal in the Software without */
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/* restriction, including without limitation the rights to use, */
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/* copy, modify, merge, publish, distribute, sublicense, and/or */
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/* sell copies of the Software, and to permit persons to whom the */
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/* Software is furnished to do so, subject to the following conditions: */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#pragma once
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#include <vector>
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#include "pe_structures.h"
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#include "pe_base.h"
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#include "pe_directory.h"
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namespace pe_bliss
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{
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//Class representing relocation entry
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//RVA of relocation is not actually RVA, but
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//(real RVA) - (RVA of table)
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class relocation_entry
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{
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public:
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//Default constructor
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relocation_entry();
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//Constructor from relocation item (WORD)
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explicit relocation_entry(uint16_t relocation_value);
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//Constructor from relative rva and relocation type
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relocation_entry(uint16_t rrva, uint16_t type);
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//Returns RVA of relocation (actually, relative RVA from relocation table RVA)
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uint16_t get_rva() const;
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//Returns type of relocation
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uint16_t get_type() const;
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//Returns relocation item (rrva + type)
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uint16_t get_item() const;
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public: //Setters do not change everything inside image, they are used by PE class
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//You can also use them to rebuild relocations using rebuild_relocations()
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//Sets RVA of relocation (actually, relative RVA from relocation table RVA)
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void set_rva(uint16_t rva);
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//Sets type of relocation
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void set_type(uint16_t type);
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//Sets relocation item (rrva + type)
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void set_item(uint16_t item);
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private:
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uint16_t rva_;
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uint16_t type_;
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};
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//Class representing relocation table
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class relocation_table
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{
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public:
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typedef std::vector<relocation_entry> relocation_list;
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public:
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//Default constructor
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relocation_table();
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//Constructor from RVA of relocation table
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explicit relocation_table(uint32_t rva);
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//Returns relocation list
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const relocation_list& get_relocations() const;
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//Returns RVA of block
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uint32_t get_rva() const;
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public: //These functions do not change everything inside image, they are used by PE class
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//You can also use them to rebuild relocations using rebuild_relocations()
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//Adds relocation to table
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void add_relocation(const relocation_entry& entry);
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//Returns changeable relocation list
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relocation_list& get_relocations();
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//Sets RVA of block
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void set_rva(uint32_t rva);
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private:
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uint32_t rva_;
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relocation_list relocations_;
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};
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typedef std::vector<relocation_table> relocation_table_list;
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//Get relocation list of pe file, supports one-word sized relocations only
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//If list_absolute_entries = true, IMAGE_REL_BASED_ABSOLUTE will be listed
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const relocation_table_list get_relocations(const pe_base& pe, bool list_absolute_entries = false);
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//Simple relocations rebuilder
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//To keep PE file working, don't remove any of existing relocations in
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//relocation_table_list returned by a call to get_relocations() function
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//auto_strip_last_section - if true and relocations are placed in the last section, it will be automatically stripped
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//offset_from_section_start - offset from the beginning of reloc_section, where relocations data will be situated
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//If save_to_pe_header is true, PE header will be modified automatically
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const image_directory rebuild_relocations(pe_base& pe, const relocation_table_list& relocs, section& reloc_section, uint32_t offset_from_section_start = 0, bool save_to_pe_header = true, bool auto_strip_last_section = true);
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//Recalculates image base with the help of relocation tables
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//Recalculates VAs of DWORDS/QWORDS in image according to relocations
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//Notice: if you move some critical structures like TLS, image relocations will not fix new
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//positions of TLS VAs. Instead, some bytes that now doesn't belong to TLS will be fixed.
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//It is recommended to rebase image in the very beginning and move all structures afterwards.
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void rebase_image(pe_base& pe, const relocation_table_list& tables, uint64_t new_base);
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template<typename PEClassType>
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void rebase_image_base(pe_base& pe, const relocation_table_list& tables, uint64_t new_base);
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}
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