1 //===-- llvm/MC/MCObjectSymbolizer.h --------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the MCObjectSymbolizer class, an MCSymbolizer that is
11 // backed by an object::ObjectFile.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_MC_MCOBJECTSYMBOLIZER_H
16 #define LLVM_MC_MCOBJECTSYMBOLIZER_H
18 #include "llvm/ADT/DenseMap.h"
19 #include "llvm/MC/MCSymbolizer.h"
20 #include "llvm/Object/ObjectFile.h"
27 class MCRelocationInfo;
30 /// \brief An ObjectFile-backed symbolizer.
31 class MCObjectSymbolizer : public MCSymbolizer {
33 const object::ObjectFile *Obj;
35 typedef DenseMap<uint64_t, object::RelocationRef> AddrToRelocMap;
36 typedef std::vector<object::SectionRef> SortedSectionList;
37 SortedSectionList SortedSections;
39 // Map a load address to the first relocation that applies there. As far as I
40 // know, if there are several relocations at the exact same address, they are
41 // related and the others can be determined from the first that was found in
42 // the relocation table. For instance, on x86-64 mach-o, a SUBTRACTOR
43 // relocation (referencing the minuend symbol) is followed by an UNSIGNED
44 // relocation (referencing the subtrahend symbol).
45 AddrToRelocMap AddrToReloc;
47 // Helpers around SortedSections.
48 SortedSectionList::const_iterator findSectionContaining(uint64_t Addr) const;
49 void insertSection(object::SectionRef Section);
52 MCObjectSymbolizer(MCContext &Ctx, OwningPtr<MCRelocationInfo> &RelInfo,
53 const object::ObjectFile *Obj);
56 /// \name Overridden MCSymbolizer methods:
58 bool tryAddingSymbolicOperand(MCInst &MI, raw_ostream &cStream,
60 uint64_t Address, bool IsBranch,
61 uint64_t Offset, uint64_t InstSize);
63 void tryAddingPcLoadReferenceComment(raw_ostream &cStream,
64 int64_t Value, uint64_t Address);
67 /// \brief Create an object symbolizer for \p Obj.
68 static MCObjectSymbolizer *
69 createObjectSymbolizer(MCContext &Ctx, OwningPtr<MCRelocationInfo> &RelInfo,
70 const object::ObjectFile *Obj);