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69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
//===-- llvm/MC/MCAtom.h - MCAtom class ---------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the declaration of the MCAtom class, which is used to
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// represent a contiguous region in a decoded object that is uniformly data or
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// instructions;
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCATOM_H
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#define LLVM_MC_MCATOM_H
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#include "llvm/MC/MCInst.h"
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#include "llvm/Support/DataTypes.h"
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#include <vector>
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namespace llvm {
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class MCModule;
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/// MCData - An entry in a data MCAtom.
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// NOTE: This may change to a more complex type in the future.
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typedef uint8_t MCData;
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/// MCAtom - Represents a contiguous range of either instructions (a TextAtom)
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/// or data (a DataAtom). Address ranges are expressed as _closed_ intervals.
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class MCAtom {
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friend class MCModule;
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typedef enum { TextAtom, DataAtom } AtomType;
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AtomType Type;
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MCModule *Parent;
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uint64_t Begin, End;
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std::vector<std::pair<uint64_t, MCInst> > Text;
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std::vector<MCData> Data;
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// Private constructor - only callable by MCModule
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MCAtom(AtomType T, MCModule *P, uint64_t B, uint64_t E)
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: Type(T), Parent(P), Begin(B), End(E) { }
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public:
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bool isTextAtom() { return Type == TextAtom; }
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bool isDataAtom() { return Type == DataAtom; }
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void addInst(const MCInst &I, uint64_t Address, unsigned Size);
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void addData(const MCData &D);
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/// split - Splits the atom in two at a given address, which must align with
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/// and instruction boundary if this is a TextAtom. Returns the newly created
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/// atom representing the high part of the split.
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MCAtom *split(uint64_t SplitPt);
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/// truncate - Truncates an atom so that TruncPt is the last byte address
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/// contained in the atom.
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void truncate(uint64_t TruncPt);
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};
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}
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#endif
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