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52ce0c101e
This compiles with no changes to clang/lld/lldb with MSVC and includes overloads to various functions which are used by those projects and llvm which have OwningPtr's as parameters. This should allow out of tree projects some time to move. There are also no changes to libs/Target, which should help out of tree targets have time to move, if necessary. llvm-svn: 203083
82 lines
3.3 KiB
C++
82 lines
3.3 KiB
C++
//===-- llvm/MC/MCSymbolizer.h - MCSymbolizer 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 MCSymbolizer class, which is used
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// to symbolize instructions decoded from an object, that is, transform their
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// immediate operands to MCExprs.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCSYMBOLIZER_H
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#define LLVM_MC_MCSYMBOLIZER_H
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#include "llvm/MC/MCRelocationInfo.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/DataTypes.h"
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#include <memory>
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namespace llvm {
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class MCContext;
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class MCInst;
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class raw_ostream;
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/// \brief Symbolize and annotate disassembled instructions.
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///
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/// For now this mimics the old symbolization logic (from both ARM and x86), that
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/// relied on user-provided (C API) callbacks to do the actual symbol lookup in
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/// the object file. This was moved to MCExternalSymbolizer.
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/// A better API would not rely on actually calling the two methods here from
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/// inside each disassembler, but would use the instr info to determine what
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/// operands are actually symbolizable, and in what way. I don't think this
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/// information exists right now.
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class MCSymbolizer {
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MCSymbolizer(const MCSymbolizer &) LLVM_DELETED_FUNCTION;
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void operator=(const MCSymbolizer &) LLVM_DELETED_FUNCTION;
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protected:
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MCContext &Ctx;
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std::unique_ptr<MCRelocationInfo> RelInfo;
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public:
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/// \brief Construct an MCSymbolizer, taking ownership of \p RelInfo.
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MCSymbolizer(MCContext &Ctx, std::unique_ptr<MCRelocationInfo> &RelInfo);
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virtual ~MCSymbolizer();
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/// \brief Try to add a symbolic operand instead of \p Value to the MCInst.
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///
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/// Instead of having a difficult to read immediate, a symbolic operand would
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/// represent this immediate in a more understandable way, for instance as a
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/// symbol or an offset from a symbol. Relocations can also be used to enrich
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/// the symbolic expression.
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/// @param Inst - The MCInst where to insert the symbolic operand.
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/// @param cStream - Stream to print comments and annotations on.
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/// @param Value - Operand value, pc-adjusted by the caller if necessary.
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/// @param Address - Load address of the instruction.
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/// @param IsBranch - Is the instruction a branch?
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/// @param Offset - Byte offset of the operand inside the inst.
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/// @param InstSize - Size of the instruction in bytes.
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/// @return Whether a symbolic operand was added.
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virtual bool tryAddingSymbolicOperand(MCInst &Inst, raw_ostream &cStream,
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int64_t Value, uint64_t Address,
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bool IsBranch, uint64_t Offset,
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uint64_t InstSize) = 0;
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/// \brief Try to add a comment on the PC-relative load.
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/// For instance, in Mach-O, this is used to add annotations to instructions
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/// that use C string literals, as found in __cstring.
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virtual void tryAddingPcLoadReferenceComment(raw_ostream &cStream,
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int64_t Value,
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uint64_t Address) = 0;
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};
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}
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#endif
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