1 //===-- RuntimeDyldMachO.h - Run-time dynamic linker for MC-JIT ---*- C++ -*-=//
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 // MachO support for MC-JIT runtime dynamic linker.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_RUNTIME_DYLD_MACHO_H
15 #define LLVM_RUNTIME_DYLD_MACHO_H
17 #include "llvm/ADT/IndexedMap.h"
18 #include "llvm/Object/MachOObject.h"
19 #include "llvm/Support/Format.h"
20 #include "RuntimeDyldImpl.h"
23 using namespace llvm::object;
27 class RuntimeDyldMachO : public RuntimeDyldImpl {
29 // For each symbol, keep a list of relocations based on it. Anytime
30 // its address is reassigned (the JIT re-compiled the function, e.g.),
31 // the relocations get re-resolved.
32 // The symbol (or section) the relocation is sourced from is the Key
33 // in the relocation list where it's stored.
34 struct RelocationEntry {
35 unsigned SectionID; // Section the relocation is contained in.
36 uint64_t Offset; // Offset into the section for the relocation.
37 uint32_t Data; // Second word of the raw macho relocation entry.
38 int64_t Addend; // Addend encoded in the instruction itself, if any,
39 // plus the offset into the source section for
40 // the symbol once the relocation is resolvable.
42 RelocationEntry(unsigned id, uint64_t offset, uint32_t data, int64_t addend)
43 : SectionID(id), Offset(offset), Data(data), Addend(addend) {}
45 typedef SmallVector<RelocationEntry, 4> RelocationList;
46 // Relocations to sections already loaded. Indexed by SectionID which is the
47 // source of the address. The target where the address will be writen is
48 // SectionID/Offset in the relocation itself.
49 IndexedMap<RelocationList> Relocations;
50 // Relocations to symbols that are not yet resolved. Must be external
51 // relocations by definition. Indexed by symbol name.
52 StringMap<RelocationList> UnresolvedRelocations;
54 bool resolveRelocation(uint8_t *Address, uint64_t Value, bool isPCRel,
55 unsigned Type, unsigned Size, int64_t Addend);
56 bool resolveX86_64Relocation(uintptr_t Address, uintptr_t Value, bool isPCRel,
57 unsigned Type, unsigned Size, int64_t Addend);
58 bool resolveARMRelocation(uintptr_t Address, uintptr_t Value, bool isPCRel,
59 unsigned Type, unsigned Size, int64_t Addend);
61 bool loadSegment32(const MachOObject *Obj,
62 const MachOObject::LoadCommandInfo *SegmentLCI,
63 const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
64 bool loadSegment64(const MachOObject *Obj,
65 const MachOObject::LoadCommandInfo *SegmentLCI,
66 const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
67 bool processSymbols32(const MachOObject *Obj,
68 SmallVectorImpl<unsigned> &SectionMap,
69 SmallVectorImpl<StringRef> &SymbolNames,
70 const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
71 bool processSymbols64(const MachOObject *Obj,
72 SmallVectorImpl<unsigned> &SectionMap,
73 SmallVectorImpl<StringRef> &SymbolNames,
74 const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
76 void resolveSymbol(StringRef Name);
79 RuntimeDyldMachO(RTDyldMemoryManager *mm) : RuntimeDyldImpl(mm) {}
81 bool loadObject(MemoryBuffer *InputBuffer);
83 void reassignSectionAddress(unsigned SectionID, uint64_t Addr);
85 static bool isKnownFormat(const MemoryBuffer *InputBuffer);
87 bool isCompatibleFormat(const MemoryBuffer *InputBuffer) const {
88 return isKnownFormat(InputBuffer);
92 } // end namespace llvm
96 //===-- RuntimeDyldMachO.h - Run-time dynamic linker for MC-JIT ---*- C++ -*-=//
98 // The LLVM Compiler Infrastructure
100 // This file is distributed under the University of Illinois Open Source
101 // License. See LICENSE.TXT for details.
103 //===----------------------------------------------------------------------===//
105 // MachO support for MC-JIT runtime dynamic linker.
107 //===----------------------------------------------------------------------===//
109 #ifndef LLVM_RUNTIME_DYLD_MACHO_H
110 #define LLVM_RUNTIME_DYLD_MACHO_H
112 #include "llvm/ADT/IndexedMap.h"
113 #include "llvm/Object/MachOObject.h"
114 #include "llvm/Support/Format.h"
115 #include "RuntimeDyldImpl.h"
117 using namespace llvm;
118 using namespace llvm::object;
122 class RuntimeDyldMachO : public RuntimeDyldImpl {
124 // For each symbol, keep a list of relocations based on it. Anytime
125 // its address is reassigned (the JIT re-compiled the function, e.g.),
126 // the relocations get re-resolved.
127 // The symbol (or section) the relocation is sourced from is the Key
128 // in the relocation list where it's stored.
129 struct RelocationEntry {
130 unsigned SectionID; // Section the relocation is contained in.
131 uint64_t Offset; // Offset into the section for the relocation.
132 uint32_t Data; // Second word of the raw macho relocation entry.
133 int64_t Addend; // Addend encoded in the instruction itself, if any,
134 // plus the offset into the source section for
135 // the symbol once the relocation is resolvable.
137 RelocationEntry(unsigned id, uint64_t offset, uint32_t data, int64_t addend)
138 : SectionID(id), Offset(offset), Data(data), Addend(addend) {}
140 typedef SmallVector<RelocationEntry, 4> RelocationList;
141 // Relocations to sections already loaded. Indexed by SectionID which is the
142 // source of the address. The target where the address will be writen is
143 // SectionID/Offset in the relocation itself.
144 IndexedMap<RelocationList> Relocations;
145 // Relocations to symbols that are not yet resolved. Must be external
146 // relocations by definition. Indexed by symbol name.
147 StringMap<RelocationList> UnresolvedRelocations;
149 bool resolveRelocation(uint8_t *Address, uint64_t Value, bool isPCRel,
150 unsigned Type, unsigned Size, int64_t Addend);
151 bool resolveX86_64Relocation(uintptr_t Address, uintptr_t Value, bool isPCRel,
152 unsigned Type, unsigned Size, int64_t Addend);
153 bool resolveARMRelocation(uintptr_t Address, uintptr_t Value, bool isPCRel,
154 unsigned Type, unsigned Size, int64_t Addend);
156 bool loadSegment32(const MachOObject *Obj,
157 const MachOObject::LoadCommandInfo *SegmentLCI,
158 const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
159 bool loadSegment64(const MachOObject *Obj,
160 const MachOObject::LoadCommandInfo *SegmentLCI,
161 const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
162 bool processSymbols32(const MachOObject *Obj,
163 SmallVectorImpl<unsigned> &SectionMap,
164 SmallVectorImpl<StringRef> &SymbolNames,
165 const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
166 bool processSymbols64(const MachOObject *Obj,
167 SmallVectorImpl<unsigned> &SectionMap,
168 SmallVectorImpl<StringRef> &SymbolNames,
169 const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
171 void resolveSymbol(StringRef Name);
174 RuntimeDyldMachO(RTDyldMemoryManager *mm) : RuntimeDyldImpl(mm) {}
176 bool loadObject(MemoryBuffer *InputBuffer);
178 void reassignSectionAddress(unsigned SectionID, uint64_t Addr);
180 static bool isKnownFormat(const MemoryBuffer *InputBuffer);
182 bool isCompatibleFormat(const MemoryBuffer *InputBuffer) const {
183 return isKnownFormat(InputBuffer);
187 } // end namespace llvm