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f4ccd11075
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203083 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
//===-- llvm/MC/MCObjectSymbolizer.h --------------------------------------===//
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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 declares the MCObjectSymbolizer class, an MCSymbolizer that is
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// backed by an object::ObjectFile.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCOBJECTSYMBOLIZER_H
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#define LLVM_MC_MCOBJECTSYMBOLIZER_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/MC/MCSymbolizer.h"
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#include "llvm/Object/ObjectFile.h"
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#include <vector>
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namespace llvm {
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class MCExpr;
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class MCInst;
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class MCRelocationInfo;
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class raw_ostream;
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/// \brief An ObjectFile-backed symbolizer.
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class MCObjectSymbolizer : public MCSymbolizer {
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protected:
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const object::ObjectFile *Obj;
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// Map a load address to the first relocation that applies there. As far as I
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// know, if there are several relocations at the exact same address, they are
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// related and the others can be determined from the first that was found in
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// the relocation table. For instance, on x86-64 mach-o, a SUBTRACTOR
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// relocation (referencing the minuend symbol) is followed by an UNSIGNED
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// relocation (referencing the subtrahend symbol).
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const object::RelocationRef *findRelocationAt(uint64_t Addr);
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const object::SectionRef *findSectionContaining(uint64_t Addr);
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MCObjectSymbolizer(MCContext &Ctx, std::unique_ptr<MCRelocationInfo> &RelInfo,
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const object::ObjectFile *Obj);
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public:
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/// \name Overridden MCSymbolizer methods:
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/// @{
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bool tryAddingSymbolicOperand(MCInst &MI, 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);
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void tryAddingPcLoadReferenceComment(raw_ostream &cStream,
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int64_t Value, uint64_t Address);
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/// @}
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/// \brief Look for an external function symbol at \p Addr.
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/// (References through the ELF PLT, Mach-O stubs, and similar).
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/// \returns An MCExpr representing the external symbol, or 0 if not found.
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virtual StringRef findExternalFunctionAt(uint64_t Addr);
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/// \brief Create an object symbolizer for \p Obj.
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static MCObjectSymbolizer *
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createObjectSymbolizer(MCContext &Ctx,
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std::unique_ptr<MCRelocationInfo> &RelInfo,
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const object::ObjectFile *Obj);
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private:
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typedef DenseMap<uint64_t, object::RelocationRef> AddrToRelocMap;
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typedef std::vector<object::SectionRef> SortedSectionList;
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SortedSectionList SortedSections;
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AddrToRelocMap AddrToReloc;
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void buildSectionList();
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void buildRelocationByAddrMap();
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};
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}
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#endif
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