zydis/Zydis/ZydisInstructionFormatter.hpp

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/***************************************************************************************************
Zyan Disassembler Engine
Version 1.0
Remarks : Freeware, Copyright must be included
Original Author : Florian Bernd
Modifications : Joel H<EFBFBD>ner
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
***************************************************************************************************/
#ifndef _ZYDIS_INSTRUCTIONFORMATTER_HPP_
#define _ZYDIS_INSTRUCTIONFORMATTER_HPP_
#include <vector>
#include "ZydisTypes.hpp"
#include "ZydisSymbolResolver.hpp"
namespace Zydis
{
/* BaseInstructionFormatter ===================================================================== */
/**
* @brief Base class for all instruction formatter implementations.
*/
class BaseInstructionFormatter
{
private:
static const char* m_registerStrings[];
BaseSymbolResolver* m_symbolResolver;
std::vector<char> m_outputBuffer;
size_t m_outputStringLen;
bool m_outputUppercase;
protected:
/**
* @brief Clears the output string buffer.
*/
void outputClear();
/**
* @brief Returns the content of the output string buffer.
* @return Pointer to the content of the ouput string buffer.
*/
const char* outputString();
/**
* @brief Appends text to the ouput string buffer.
* @param text The text.
*/
void outputAppend(const char* text);
/**
* @brief Appends formatted text to the output string buffer.
* @param format The format string.
*/
void outputAppendFormatted(const char* format, ...);
/**
* @brief Changes automatic conversion of characters to uppercase.
* @param uppercase Set true to enable automatic uppercase conversion.
*/
void outputSetUppercase(bool uppercase);
/**
* @brief Appends a formatted address to the output string buffer.
* @param info The instruction info.
* @param address The address.
* @param resolveSymbols If this parameter is true, the method will try to display a
* smybol name instead of the numeric value.
*/
void outputAppendAddress(const InstructionInfo& info, uint64_t address,
bool resolveSymbols = true);
/**
* @brief Appends a formatted immediate value to the output string buffer.
* @param info The instruction info.
* @param operand The immediate operand.
* @param resolveSymbols If this parameter is true, the method will try to display a
* smybol name instead of the numeric value.
*/
void outputAppendImmediate(const InstructionInfo& info, const OperandInfo& operand,
bool resolveSymbols = false);
/**
* @brief Appends a formatted memory displacement value to the output string buffer.
* @param operand The memory operand.
*/
void outputAppendDisplacement(const OperandInfo& operand);
protected:
/**
* @brief Returns the string representation of a given register.
* @param reg The register.
* @return The string representation of the given register.
*/
const char *registerToString(Register reg) const;
/**
* @brief Resolves a symbol.
* @param info The instruction info.
* @param address The address.
* @param offset Reference to an unsigned 64 bit integer that receives an offset
* relative to the base address of the symbol.
* @return The name of the symbol, if the symbol was found, @c NULL if not.
*/
const char* resolveSymbol(const InstructionInfo& info, uint64_t address,
uint64_t& offset) const;
protected:
/**
* @brief Override this method to implement a custom disassembly syntax. Use the
* @c outputAppend and @c outputAppendFormatted methods to fill the internal
* string buffer.
* @param info The instruction info.
*/
virtual void internalFormatInstruction(const InstructionInfo& info);
/**
* @brief Default constructor.
*/
BaseInstructionFormatter();
/**
* @brief Constructor.
* @param symbolResolver Pointer to a symbol resolver instance or @c NULL, if no smybol
* resolver should be used.
*/
explicit BaseInstructionFormatter(BaseSymbolResolver* symbolResolver);
public:
/**
* @brief Destructor.
*/
virtual ~BaseInstructionFormatter();
public:
/**
* @brief Formats a decoded instruction.
* @param info The instruction info.
* @return Pointer to the formatted instruction string.
*/
const char* formatInstruction(const InstructionInfo& info);
public:
/**
* @brief Returns a pointer to the current symbol resolver.
* @return Pointer to the current symbol resolver or @c NULL, if no symbol resolver is used.
*/
BaseSymbolResolver* getSymbolResolver() const;
/**
* @brief Sets a new symbol resolver.
* @param symbolResolver Pointer to a symbol resolver instance or @c NULL, if no smybol
* resolver should be used.
*/
void setSymbolResolver(BaseSymbolResolver* symbolResolver);
};
inline void BaseInstructionFormatter::outputSetUppercase(bool uppercase)
{
m_outputUppercase = uppercase;
}
inline char const* BaseInstructionFormatter::registerToString(Register reg) const
{
if (reg == Register::NONE)
{
return "error";
}
return m_registerStrings[static_cast<uint16_t>(reg) - 1];
}
inline char const* BaseInstructionFormatter::resolveSymbol(const InstructionInfo& info,
uint64_t address, uint64_t& offset) const
{
if (m_symbolResolver)
{
return m_symbolResolver->resolveSymbol(info, address, offset);
}
return nullptr;
}
inline BaseSymbolResolver* BaseInstructionFormatter::getSymbolResolver() const
{
return m_symbolResolver;
}
inline void BaseInstructionFormatter::setSymbolResolver(
BaseSymbolResolver* symbolResolver)
{
m_symbolResolver = symbolResolver;
}
/* IntelInstructionFormatter ==================================================================== */
/**
* @brief Intel syntax instruction formatter.
*/
class IntelInstructionFormatter : public BaseInstructionFormatter
{
private:
/**
* @brief Appends an operand cast to the output string buffer.
* @param operand The operand.
*/
void outputAppendOperandCast(const OperandInfo& operand);
/**
* @brief Formats the specified operand and appends the resulting string to the output
* buffer.
* @param info The instruction info.
* @param operand The operand.
*/
void formatOperand(const InstructionInfo& info, const OperandInfo& operand);
protected:
/**
* @brief Fills the internal string buffer with an intel style formatted instruction string.
* @param info The instruction info.
*/
void internalFormatInstruction(const InstructionInfo& info) override;
public:
/**
* @brief Default constructor.
*/
IntelInstructionFormatter();
/**
* @brief Constructor.
* @param symbolResolver Pointer to a symbol resolver instance or @c NULL, if no smybol
* resolver should be used.
*/
explicit IntelInstructionFormatter(BaseSymbolResolver* symbolResolver);
/**
* @brief Destructor.
*/
~IntelInstructionFormatter() override;
};
/* ============================================================================================== */
}
#endif /* _ZYDIS_INSTRUCTIONFORMATTER_HPP_ */