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//===-- llvm/MC/MCObjectDisassembler.h --------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the declaration of the MCObjectDisassembler class, which
// can be used to construct an MCModule and an MC CFG from an ObjectFile.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCOBJECTDISASSEMBLER_H
#define LLVM_MC_MCOBJECTDISASSEMBLER_H
namespace llvm {
namespace object {
class ObjectFile;
}
class MCBasicBlock;
class MCDisassembler;
class MCFunction;
class MCInstrAnalysis;
class MCModule;
/// \brief Disassemble an ObjectFile to an MCModule and MCFunctions.
/// This class builds on MCDisassembler to disassemble whole sections, creating
/// MCAtom (MCTextAtom for disassembled sections and MCDataAtom for raw data).
/// It can also be used to create a control flow graph consisting of MCFunctions
/// and MCBasicBlocks.
class MCObjectDisassembler {
const object::ObjectFile &Obj;
const MCDisassembler &Dis;
const MCInstrAnalysis &MIA;
public:
MCObjectDisassembler(const object::ObjectFile &Obj,
const MCDisassembler &Dis,
const MCInstrAnalysis &MIA);
/// \brief Build an MCModule, creating atoms and optionally functions.
/// \param withCFG Also build a CFG by adding MCFunctions to the Module.
/// If withCFG is false, the MCModule built only contains atoms, representing
/// what was found in the object file. If withCFG is true, MCFunctions are
/// created, containing MCBasicBlocks. All text atoms are split to form basic
/// block atoms, which then each back an MCBasicBlock.
MCModule *buildModule(bool withCFG = false);
private:
/// \brief Fill \p Module by creating an atom for each section.
/// This could be made much smarter, using information like symbols, but also
/// format-specific features, like mach-o function_start or data_in_code LCs.
void buildSectionAtoms(MCModule *Module);
/// \brief Enrich \p Module with a CFG consisting of MCFunctions.
/// \param Module An MCModule returned by buildModule, with no CFG.
/// NOTE: Each MCBasicBlock in a MCFunction is backed by a single MCTextAtom.
/// When the CFG is built, contiguous instructions that were previously in a
/// single MCTextAtom will be split in multiple basic block atoms.
void buildCFG(MCModule *Module);
};
}
#endif
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