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https://github.com/c64scene-ar/llvm-6502.git
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9bfc0626c0
Only implemented in the Mach-O ObjectSymbolizer. The testcase sadly introduces a new binary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188879 91177308-0d34-0410-b5e6-96231b3b80d8
82 lines
2.8 KiB
C++
82 lines
2.8 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, OwningPtr<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, OwningPtr<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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