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RuntimeDyldMachOARM.h
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1 //===----- RuntimeDyldMachOARM.h ---- MachO/ARM specific code. ----*- C++ -*-=//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_LIB_EXECUTIONENGINE_RUNTIMEDYLD_TARGETS_RUNTIMEDYLDMACHOARM_H
10 #define LLVM_LIB_EXECUTIONENGINE_RUNTIMEDYLD_TARGETS_RUNTIMEDYLDMACHOARM_H
11 
12 #include "../RuntimeDyldMachO.h"
13 #include <string>
14 
15 #define DEBUG_TYPE "dyld"
16 
17 namespace llvm {
18 
20  : public RuntimeDyldMachOCRTPBase<RuntimeDyldMachOARM> {
21 private:
23 
24 public:
25 
27 
30  : RuntimeDyldMachOCRTPBase(MM, Resolver) {}
31 
32  unsigned getMaxStubSize() const override { return 8; }
33 
34  unsigned getStubAlignment() override { return 4; }
35 
37  auto Flags = RuntimeDyldImpl::getJITSymbolFlags(SR);
38  if (!Flags)
39  return Flags.takeError();
40  Flags->getTargetFlags() = ARMJITSymbolFlags::fromObjectSymbol(SR);
41  return Flags;
42  }
43 
44  uint64_t modifyAddressBasedOnFlags(uint64_t Addr,
45  JITSymbolFlags Flags) const override {
47  Addr |= 0x1;
48  return Addr;
49  }
50 
51  bool isAddrTargetThumb(unsigned SectionID, uint64_t Offset) {
52  auto TargetObjAddr = Sections[SectionID].getObjAddress() + Offset;
53  for (auto &KV : GlobalSymbolTable) {
54  auto &Entry = KV.second;
55  auto SymbolObjAddr =
56  Sections[Entry.getSectionID()].getObjAddress() + Entry.getOffset();
57  if (TargetObjAddr == SymbolObjAddr)
58  return (Entry.getFlags().getTargetFlags() & ARMJITSymbolFlags::Thumb);
59  }
60  return false;
61  }
62 
65  uint8_t *LocalAddress = Section.getAddressWithOffset(RE.Offset);
66 
67  switch (RE.RelType) {
68  default:
69  return memcpyAddend(RE);
70  case MachO::ARM_RELOC_BR24: {
71  uint32_t Temp = readBytesUnaligned(LocalAddress, 4);
72  Temp &= 0x00ffffff; // Mask out the opcode.
73  // Now we've got the shifted immediate, shift by 2, sign extend and ret.
74  return SignExtend32<26>(Temp << 2);
75  }
76 
78  // This is a pair of instructions whose operands combine to provide 22
79  // bits of displacement:
80  // Encoding for high bits 1111 0XXX XXXX XXXX
81  // Encoding for low bits 1111 1XXX XXXX XXXX
82  uint16_t HighInsn = readBytesUnaligned(LocalAddress, 2);
83  if ((HighInsn & 0xf800) != 0xf000)
84  return make_error<StringError>("Unrecognized thumb branch encoding "
85  "(BR22 high bits)",
87 
88  uint16_t LowInsn = readBytesUnaligned(LocalAddress + 2, 2);
89  if ((LowInsn & 0xf800) != 0xf800)
90  return make_error<StringError>("Unrecognized thumb branch encoding "
91  "(BR22 low bits)",
93 
94  return SignExtend64<23>(((HighInsn & 0x7ff) << 12) |
95  ((LowInsn & 0x7ff) << 1));
96  }
97  }
98  }
99 
101  processRelocationRef(unsigned SectionID, relocation_iterator RelI,
102  const ObjectFile &BaseObjT,
103  ObjSectionToIDMap &ObjSectionToID,
104  StubMap &Stubs) override {
105  const MachOObjectFile &Obj =
106  static_cast<const MachOObjectFile &>(BaseObjT);
108  Obj.getRelocation(RelI->getRawDataRefImpl());
109  uint32_t RelType = Obj.getAnyRelocationType(RelInfo);
110 
111  // Set to true for thumb functions in this (or previous) TUs.
112  // Will be used to set the TargetIsThumbFunc member on the relocation entry.
113  bool TargetIsLocalThumbFunc = false;
114  if (Obj.getPlainRelocationExternal(RelInfo)) {
115  auto Symbol = RelI->getSymbol();
116  StringRef TargetName;
117  if (auto TargetNameOrErr = Symbol->getName())
118  TargetName = *TargetNameOrErr;
119  else
120  return TargetNameOrErr.takeError();
121 
122  // If the target is external but the value doesn't have a name then we've
123  // converted the value to a section/offset pair, but we still need to set
124  // the IsTargetThumbFunc bit, so look the value up in the globla symbol table.
125  auto EntryItr = GlobalSymbolTable.find(TargetName);
126  if (EntryItr != GlobalSymbolTable.end()) {
127  TargetIsLocalThumbFunc =
128  EntryItr->second.getFlags().getTargetFlags() &
130  }
131  }
132 
133  if (Obj.isRelocationScattered(RelInfo)) {
134  if (RelType == MachO::ARM_RELOC_HALF_SECTDIFF)
135  return processHALFSECTDIFFRelocation(SectionID, RelI, Obj,
136  ObjSectionToID);
137  else if (RelType == MachO::GENERIC_RELOC_VANILLA)
138  return processScatteredVANILLA(SectionID, RelI, Obj, ObjSectionToID,
139  TargetIsLocalThumbFunc);
140  else
141  return ++RelI;
142  }
143 
144  // Sanity check relocation type.
145  switch (RelType) {
152  default:
153  if (RelType > MachO::ARM_RELOC_HALF_SECTDIFF)
154  return make_error<RuntimeDyldError>(("MachO ARM relocation type " +
155  Twine(RelType) +
156  " is out of range").str());
157  break;
158  }
159 
160  RelocationEntry RE(getRelocationEntry(SectionID, Obj, RelI));
161  if (auto AddendOrErr = decodeAddend(RE))
162  RE.Addend = *AddendOrErr;
163  else
164  return AddendOrErr.takeError();
165  RE.IsTargetThumbFunc = TargetIsLocalThumbFunc;
166 
168  if (auto ValueOrErr = getRelocationValueRef(Obj, RelI, RE, ObjSectionToID))
169  Value = *ValueOrErr;
170  else
171  return ValueOrErr.takeError();
172 
173  // If this is a branch from a thumb function (BR22) then make sure we mark
174  // the value as being a thumb stub: we don't want to mix it up with an ARM
175  // stub targeting the same function.
177  Value.IsStubThumb = true;
178 
179  if (RE.IsPCRel)
180  makeValueAddendPCRel(Value, RelI,
181  (RE.RelType == MachO::ARM_THUMB_RELOC_BR22) ? 4 : 8);
182 
183  // If this is a non-external branch target check whether Value points to a
184  // thumb func.
185  if (!Value.SymbolName && (RelType == MachO::ARM_RELOC_BR24 ||
186  RelType == MachO::ARM_THUMB_RELOC_BR22))
188 
189  if (RE.RelType == MachO::ARM_RELOC_BR24 ||
191  processBranchRelocation(RE, Value, Stubs);
192  else {
193  RE.Addend = Value.Offset;
194  if (Value.SymbolName)
196  else
198  }
199 
200  return ++RelI;
201  }
202 
203  void resolveRelocation(const RelocationEntry &RE, uint64_t Value) override {
205  const SectionEntry &Section = Sections[RE.SectionID];
206  uint8_t *LocalAddress = Section.getAddressWithOffset(RE.Offset);
207 
208  // If the relocation is PC-relative, the value to be encoded is the
209  // pointer difference.
210  if (RE.IsPCRel) {
211  uint64_t FinalAddress = Section.getLoadAddressWithOffset(RE.Offset);
212  Value -= FinalAddress;
213  // ARM PCRel relocations have an effective-PC offset of two instructions
214  // (four bytes in Thumb mode, 8 bytes in ARM mode).
215  Value -= (RE.RelType == MachO::ARM_THUMB_RELOC_BR22) ? 4 : 8;
216  }
217 
218  switch (RE.RelType) {
220  Value += RE.Addend;
221  uint16_t HighInsn = readBytesUnaligned(LocalAddress, 2);
222  assert((HighInsn & 0xf800) == 0xf000 &&
223  "Unrecognized thumb branch encoding (BR22 high bits)");
224  HighInsn = (HighInsn & 0xf800) | ((Value >> 12) & 0x7ff);
225 
226  uint16_t LowInsn = readBytesUnaligned(LocalAddress + 2, 2);
227  assert((LowInsn & 0xf800) == 0xf800 &&
228  "Unrecognized thumb branch encoding (BR22 low bits)");
229  LowInsn = (LowInsn & 0xf800) | ((Value >> 1) & 0x7ff);
230 
231  writeBytesUnaligned(HighInsn, LocalAddress, 2);
232  writeBytesUnaligned(LowInsn, LocalAddress + 2, 2);
233  break;
234  }
235 
237  if (RE.IsTargetThumbFunc)
238  Value |= 0x01;
239  writeBytesUnaligned(Value + RE.Addend, LocalAddress, 1 << RE.Size);
240  break;
241  case MachO::ARM_RELOC_BR24: {
242  // Mask the value into the target address. We know instructions are
243  // 32-bit aligned, so we can do it all at once.
244  Value += RE.Addend;
245  // The low two bits of the value are not encoded.
246  Value >>= 2;
247  // Mask the value to 24 bits.
248  uint64_t FinalValue = Value & 0xffffff;
249  // FIXME: If the destination is a Thumb function (and the instruction
250  // is a non-predicated BL instruction), we need to change it to a BLX
251  // instruction instead.
252 
253  // Insert the value into the instruction.
254  uint32_t Temp = readBytesUnaligned(LocalAddress, 4);
255  writeBytesUnaligned((Temp & ~0xffffff) | FinalValue, LocalAddress, 4);
256 
257  break;
258  }
260  uint64_t SectionABase = Sections[RE.Sections.SectionA].getLoadAddress();
261  uint64_t SectionBBase = Sections[RE.Sections.SectionB].getLoadAddress();
262  assert((Value == SectionABase || Value == SectionBBase) &&
263  "Unexpected HALFSECTDIFF relocation value.");
264  Value = SectionABase - SectionBBase + RE.Addend;
265  if (RE.Size & 0x1) // :upper16:
266  Value = (Value >> 16);
267 
268  bool IsThumb = RE.Size & 0x2;
269 
270  Value &= 0xffff;
271 
272  uint32_t Insn = readBytesUnaligned(LocalAddress, 4);
273 
274  if (IsThumb)
275  Insn = (Insn & 0x8f00fbf0) | ((Value & 0xf000) >> 12) |
276  ((Value & 0x0800) >> 1) | ((Value & 0x0700) << 20) |
277  ((Value & 0x00ff) << 16);
278  else
279  Insn = (Insn & 0xfff0f000) | ((Value & 0xf000) << 4) | (Value & 0x0fff);
280  writeBytesUnaligned(Insn, LocalAddress, 4);
281  break;
282  }
283 
284  default:
285  llvm_unreachable("Invalid relocation type");
286  }
287  }
288 
289  Error finalizeSection(const ObjectFile &Obj, unsigned SectionID,
290  const SectionRef &Section) {
291  StringRef Name;
292  Section.getName(Name);
293 
294  if (Name == "__nl_symbol_ptr")
295  return populateIndirectSymbolPointersSection(cast<MachOObjectFile>(Obj),
296  Section, SectionID);
297  return Error::success();
298  }
299 
300 private:
301 
302  void processBranchRelocation(const RelocationEntry &RE,
303  const RelocationValueRef &Value,
304  StubMap &Stubs) {
305  // This is an ARM branch relocation, need to use a stub function.
306  // Look up for existing stub.
308  RuntimeDyldMachO::StubMap::const_iterator i = Stubs.find(Value);
309  uint8_t *Addr;
310  if (i != Stubs.end()) {
311  Addr = Section.getAddressWithOffset(i->second);
312  } else {
313  // Create a new stub function.
314  assert(Section.getStubOffset() % 4 == 0 && "Misaligned stub");
315  Stubs[Value] = Section.getStubOffset();
316  uint32_t StubOpcode = 0;
317  if (RE.RelType == MachO::ARM_RELOC_BR24)
318  StubOpcode = 0xe51ff004; // ldr pc, [pc, #-4]
319  else if (RE.RelType == MachO::ARM_THUMB_RELOC_BR22)
320  StubOpcode = 0xf000f8df; // ldr pc, [pc]
321  else
322  llvm_unreachable("Unrecognized relocation");
323  Addr = Section.getAddressWithOffset(Section.getStubOffset());
324  writeBytesUnaligned(StubOpcode, Addr, 4);
325  uint8_t *StubTargetAddr = Addr + 4;
326  RelocationEntry StubRE(
327  RE.SectionID, StubTargetAddr - Section.getAddress(),
328  MachO::GENERIC_RELOC_VANILLA, Value.Offset, false, 2);
330  if (Value.SymbolName)
331  addRelocationForSymbol(StubRE, Value.SymbolName);
332  else
333  addRelocationForSection(StubRE, Value.SectionID);
335  }
336  RelocationEntry TargetRE(RE.SectionID, RE.Offset, RE.RelType, 0,
337  RE.IsPCRel, RE.Size);
338  resolveRelocation(TargetRE, (uint64_t)Addr);
339  }
340 
342  processHALFSECTDIFFRelocation(unsigned SectionID, relocation_iterator RelI,
343  const ObjectFile &BaseTObj,
344  ObjSectionToIDMap &ObjSectionToID) {
345  const MachOObjectFile &MachO =
346  static_cast<const MachOObjectFile&>(BaseTObj);
348  MachO.getRelocation(RelI->getRawDataRefImpl());
349 
350  // For a half-diff relocation the length bits actually record whether this
351  // is a movw/movt, and whether this is arm or thumb.
352  // Bit 0 indicates movw (b0 == 0) or movt (b0 == 1).
353  // Bit 1 indicates arm (b1 == 0) or thumb (b1 == 1).
354  unsigned HalfDiffKindBits = MachO.getAnyRelocationLength(RE);
355  bool IsThumb = HalfDiffKindBits & 0x2;
356 
357  SectionEntry &Section = Sections[SectionID];
358  uint32_t RelocType = MachO.getAnyRelocationType(RE);
359  bool IsPCRel = MachO.getAnyRelocationPCRel(RE);
360  uint64_t Offset = RelI->getOffset();
361  uint8_t *LocalAddress = Section.getAddressWithOffset(Offset);
362  int64_t Immediate = readBytesUnaligned(LocalAddress, 4); // Copy the whole instruction out.
363 
364  if (IsThumb)
365  Immediate = ((Immediate & 0x0000000f) << 12) |
366  ((Immediate & 0x00000400) << 1) |
367  ((Immediate & 0x70000000) >> 20) |
368  ((Immediate & 0x00ff0000) >> 16);
369  else
370  Immediate = ((Immediate >> 4) & 0xf000) | (Immediate & 0xfff);
371 
372  ++RelI;
374  MachO.getRelocation(RelI->getRawDataRefImpl());
375  uint32_t AddrA = MachO.getScatteredRelocationValue(RE);
376  section_iterator SAI = getSectionByAddress(MachO, AddrA);
377  assert(SAI != MachO.section_end() && "Can't find section for address A");
378  uint64_t SectionABase = SAI->getAddress();
379  uint64_t SectionAOffset = AddrA - SectionABase;
380  SectionRef SectionA = *SAI;
381  bool IsCode = SectionA.isText();
382  uint32_t SectionAID = ~0U;
383  if (auto SectionAIDOrErr =
384  findOrEmitSection(MachO, SectionA, IsCode, ObjSectionToID))
385  SectionAID = *SectionAIDOrErr;
386  else
387  return SectionAIDOrErr.takeError();
388 
389  uint32_t AddrB = MachO.getScatteredRelocationValue(RE2);
390  section_iterator SBI = getSectionByAddress(MachO, AddrB);
391  assert(SBI != MachO.section_end() && "Can't find section for address B");
392  uint64_t SectionBBase = SBI->getAddress();
393  uint64_t SectionBOffset = AddrB - SectionBBase;
394  SectionRef SectionB = *SBI;
395  uint32_t SectionBID = ~0U;
396  if (auto SectionBIDOrErr =
397  findOrEmitSection(MachO, SectionB, IsCode, ObjSectionToID))
398  SectionBID = *SectionBIDOrErr;
399  else
400  return SectionBIDOrErr.takeError();
401 
402  uint32_t OtherHalf = MachO.getAnyRelocationAddress(RE2) & 0xffff;
403  unsigned Shift = (HalfDiffKindBits & 0x1) ? 16 : 0;
404  uint32_t FullImmVal = (Immediate << Shift) | (OtherHalf << (16 - Shift));
405  int64_t Addend = FullImmVal - (AddrA - AddrB);
406 
407  // addend = Encoded - Expected
408  // = Encoded - (AddrA - AddrB)
409 
410  LLVM_DEBUG(dbgs() << "Found SECTDIFF: AddrA: " << AddrA
411  << ", AddrB: " << AddrB << ", Addend: " << Addend
412  << ", SectionA ID: " << SectionAID << ", SectionAOffset: "
413  << SectionAOffset << ", SectionB ID: " << SectionBID
414  << ", SectionBOffset: " << SectionBOffset << "\n");
415  RelocationEntry R(SectionID, Offset, RelocType, Addend, SectionAID,
416  SectionAOffset, SectionBID, SectionBOffset, IsPCRel,
417  HalfDiffKindBits);
418 
419  addRelocationForSection(R, SectionAID);
420 
421  return ++RelI;
422  }
423 
424 };
425 }
426 
427 #undef DEBUG_TYPE
428 
429 #endif
unsigned getStubAlignment() override
RelocationEntry - used to represent relocations internally in the dynamic linker. ...
unsigned getAnyRelocationAddress(const MachO::any_relocation_info &RE) const
This class represents lattice values for constants.
Definition: AllocatorList.h:23
unsigned getAnyRelocationPCRel(const MachO::any_relocation_info &RE) const
amdgpu Simplify well known AMD library false FunctionCallee Value const Twine & Name
uint64_t readBytesUnaligned(uint8_t *Src, unsigned Size) const
Endian-aware read Read the least significant Size bytes from Src.
uint64_t getLoadAddressWithOffset(unsigned OffsetBytes) const
Return the load address of this section with an offset.
bool getPlainRelocationExternal(const MachO::any_relocation_info &RE) const
iterator find(StringRef Key)
Definition: StringMap.h:332
void dumpRelocationToResolve(const RelocationEntry &RE, uint64_t Value) const
Dump information about the relocation entry (RE) and resolved value.
This class is the base class for all object file types.
Definition: ObjectFile.h:226
uint8_t * getAddress() const
void writeBytesUnaligned(uint64_t Value, uint8_t *Dst, unsigned Size) const
Endian-aware write.
bool IsPCRel
True if this is a PCRel relocation (MachO specific).
unsigned SectionID
SectionID - the section this relocation points to.
uint64_t modifyAddressBasedOnFlags(uint64_t Addr, JITSymbolFlags Flags) const override
Modify the given target address based on the given symbol flags.
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:80
Expected< relocation_iterator > processRelocationRef(unsigned SectionID, relocation_iterator RelI, const ObjectFile &BaseObjT, ObjSectionToIDMap &ObjSectionToID, StubMap &Stubs) override
Parses one or more object file relocations (some object files use relocation pairs) and stores it to ...
bool isText() const
Whether this section contains instructions.
Definition: ObjectFile.h:473
unsigned getMaxStubSize() const override
std::map< RelocationValueRef, uintptr_t > StubMap
Tagged union holding either a T or a Error.
Definition: CachePruning.h:22
int64_t memcpyAddend(const RelocationEntry &RE) const
This convenience method uses memcpy to extract a contiguous addend (the addend size and offset are ta...
virtual Expected< JITSymbolFlags > getJITSymbolFlags(const SymbolRef &Sym)
Generate JITSymbolFlags from a libObject symbol.
RuntimeDyldMachOARM(RuntimeDyld::MemoryManager &MM, JITSymbolResolver &Resolver)
unsigned getAnyRelocationType(const MachO::any_relocation_info &RE) const
RuntimeDyldMachOTarget - Templated base class for generic MachO linker algorithms and data structures...
Error finalizeSection(const ObjectFile &Obj, unsigned SectionID, const SectionRef &Section)
Expected< RelocationValueRef > getRelocationValueRef(const ObjectFile &BaseTObj, const relocation_iterator &RI, const RelocationEntry &RE, ObjSectionToIDMap &ObjSectionToID)
Construct a RelocationValueRef representing the relocation target.
void addRelocationForSymbol(const RelocationEntry &RE, StringRef SymbolName)
RelocationEntry getRelocationEntry(unsigned SectionID, const ObjectFile &BaseTObj, const relocation_iterator &RI) const
Given a relocation_iterator for a non-scattered relocation, construct a RelocationEntry and fill in t...
void addRelocationForSection(const RelocationEntry &RE, unsigned SectionID)
MachO::any_relocation_info getRelocation(DataRefImpl Rel) const
Interface for looking up the initializer for a variable name, used by Init::resolveReferences.
Definition: Record.h:1856
Expected< JITSymbolFlags > getJITSymbolFlags(const SymbolRef &SR) override
Generate JITSymbolFlags from a libObject symbol.
Flags for symbols in the JIT.
Definition: JITSymbol.h:55
Symbol resolution interface.
Definition: JITSymbol.h:324
Expected< unsigned > findOrEmitSection(const ObjectFile &Obj, const SectionRef &Section, bool IsCode, ObjSectionToIDMap &LocalSections)
Find Section in LocalSections.
static section_iterator getSectionByAddress(const MachOObjectFile &Obj, uint64_t Addr)
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
bool isRelocationScattered(const MachO::any_relocation_info &RE) const
Expected< int64_t > decodeAddend(const RelocationEntry &RE) const
static ErrorSuccess success()
Create a success value.
Definition: Error.h:326
int64_t Addend
Addend - the relocation addend encoded in the instruction itself.
std::error_code getName(StringRef &Result) const
Definition: ObjectFile.h:437
uint32_t RelType
RelType - relocation type.
Expected< relocation_iterator > processScatteredVANILLA(unsigned SectionID, relocation_iterator RelI, const ObjectFile &BaseObjT, RuntimeDyldMachO::ObjSectionToIDMap &ObjSectionToID, bool TargetIsLocalThumbFunc=false)
Process a scattered vanilla relocation.
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:132
uintptr_t getStubOffset() const
bool isAddrTargetThumb(unsigned SectionID, uint64_t Offset)
This is a value type class that represents a single symbol in the list of symbols in the object file...
Definition: ObjectFile.h:165
unsigned getAnyRelocationLength(const MachO::any_relocation_info &RE) const
uint64_t Offset
Offset - offset into the section.
std::map< SectionRef, unsigned > ObjSectionToIDMap
uint8_t * getAddressWithOffset(unsigned OffsetBytes) const
Return the address of this section with an offset.
TargetFlagsType & getTargetFlags()
Return a reference to the target-specific flags.
Definition: JITSymbol.h:136
SectionEntry - represents a section emitted into memory by the dynamic linker.
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
LLVM Value Representation.
Definition: Value.h:72
void resolveRelocation(const RelocationEntry &RE, uint64_t Value) override
A object file specific relocation resolver.
RTDyldSymbolTable GlobalSymbolTable
Lightweight error class with error context and mandatory checking.
Definition: Error.h:157
unsigned Size
The size of this relocation (MachO specific).
section_iterator section_end() const override
static ARMJITSymbolFlags fromObjectSymbol(const object::SymbolRef &Symbol)
Definition: JITSymbol.cpp:60
#define UNIMPLEMENTED_RELOC(RelType)
Error populateIndirectSymbolPointersSection(const MachOObjectFile &Obj, const SectionRef &PTSection, unsigned PTSectionID)
void advanceStubOffset(unsigned StubSize)
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
void makeValueAddendPCRel(RelocationValueRef &Value, const relocation_iterator &RI, unsigned OffsetToNextPC)
Make the RelocationValueRef addend PC-relative.
#define LLVM_DEBUG(X)
Definition: Debug.h:122
uint32_t getScatteredRelocationValue(const MachO::any_relocation_info &RE) const
iterator end()
Definition: StringMap.h:317
This is a value type class that represents a single section in the list of sections in the object fil...
Definition: ObjectFile.h:81
std::error_code inconvertibleErrorCode()
The value returned by this function can be returned from convertToErrorCode for Error values where no...
Definition: Error.cpp:77