10 #ifndef LLVM_LIB_EXECUTIONENGINE_RUNTIMEDYLD_TARGETS_RUNTIMEDYLDMACHOI386_H
11 #define LLVM_LIB_EXECUTIONENGINE_RUNTIMEDYLD_TARGETS_RUNTIMEDYLDMACHOI386_H
13 #include "../RuntimeDyldMachO.h"
16 #define DEBUG_TYPE "dyld"
48 return processSECTDIFFRelocation(SectionID, RelI, Obj,
52 return make_error<RuntimeDyldError>((
"Unhandled I386 scattered relocation "
53 "type: " +
Twine(RelType)).str());
62 return make_error<RuntimeDyldError>((
"MachO I386 relocation type " +
64 " is out of range").str());
74 return ValueOrErr.takeError();
107 Value -= FinalAddress + 4;
118 assert((Value == SectionABase || Value == SectionBBase) &&
119 "Unexpected SECTDIFF relocation value.");
120 Value = SectionABase - SectionBBase + RE.
Addend;
134 if (Name ==
"__jump_table")
135 return populateJumpTable(cast<MachOObjectFile>(Obj), Section, SectionID);
136 else if (Name ==
"__pointers")
156 uint64_t
Offset = RelI->getOffset();
158 unsigned NumBytes = 1 << Size;
168 uint64_t SectionABase = SAI->getAddress();
169 uint64_t SectionAOffset = AddrA - SectionABase;
171 bool IsCode = SectionA.
isText();
173 if (
auto SectionAIDOrErr =
175 SectionAID = *SectionAIDOrErr;
177 return SectionAIDOrErr.takeError();
182 uint64_t SectionBBase = SBI->getAddress();
183 uint64_t SectionBOffset = AddrB - SectionBBase;
186 if (
auto SectionBIDOrErr =
188 SectionBID = *SectionBIDOrErr;
190 return SectionBIDOrErr.takeError();
193 Addend -= AddrA - AddrB;
195 DEBUG(
dbgs() <<
"Found SECTDIFF: AddrA: " << AddrA <<
", AddrB: " << AddrB
196 <<
", Addend: " << Addend <<
", SectionA ID: " << SectionAID
197 <<
", SectionAOffset: " << SectionAOffset
198 <<
", SectionB ID: " << SectionBID
199 <<
", SectionBOffset: " << SectionBOffset <<
"\n");
201 SectionAOffset, SectionBID, SectionBOffset,
212 unsigned JTSectionID) {
216 unsigned FirstIndirectSymbol = Sec32.
reserved1;
218 unsigned NumJTEntries = JTSectionSize / JTEntrySize;
220 unsigned JTEntryOffset = 0;
222 if (JTSectionSize % JTEntrySize != 0)
223 return make_error<RuntimeDyldError>(
"Jump-table section does not contain "
224 "a whole number of stubs?");
226 for (
unsigned i = 0;
i < NumJTEntries; ++
i) {
227 unsigned SymbolIndex =
231 if (!IndirectSymbolName)
233 uint8_t *JTEntryAddr = JTSectionAddr + JTEntryOffset;
238 JTEntryOffset += JTEntrySize;
RelocationEntry - used to represent relocations internally in the dynamic linker. ...
void writeBytesUnaligned(uint64_t Value, uint8_t *Dst, unsigned Size) const
Endian-aware write.
Expected< StringRef > getName() const
unsigned getAnyRelocationType(const MachO::any_relocation_info &RE) const
void resolveRelocation(const RelocationEntry &RE, uint64_t Value) override
A object file specific relocation resolver.
This class is the base class for all object file types.
Error takeError()
Take ownership of the stored error.
DataRefImpl getRawDataRefImpl() const
uint32_t getIndirectSymbolTableEntry(const MachO::dysymtab_command &DLC, unsigned Index) const
unsigned getMaxStubSize() override
bool IsPCRel
True if this is a PCRel relocation (MachO specific).
unsigned SectionID
SectionID - the section this relocation points to.
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
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...
int64_t memcpyAddend(const RelocationEntry &RE) const
This convenience method uses memcpy to extract a contiguous addend (the addend size and offset are ta...
std::map< RelocationValueRef, uintptr_t > StubMap
Tagged union holding either a T or a Error.
uint32_t getScatteredRelocationValue(const MachO::any_relocation_info &RE) const
std::error_code getName(StringRef &Result) const
uint64_t getLoadAddressWithOffset(unsigned OffsetBytes) const
Return the load address of this section with an offset.
void dumpRelocationToResolve(const RelocationEntry &RE, uint64_t Value) const
Dump information about the relocation entry (RE) and resolved value.
RuntimeDyldMachOTarget - Templated base class for generic MachO linker algorithms and data structures...
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)
uint8_t * getAddressWithOffset(unsigned OffsetBytes) const
Return the address of this section with an offset.
MachO::any_relocation_info getRelocation(DataRefImpl Rel) const
MachO::section getSection(DataRefImpl DRI) const
void addRelocationForSection(const RelocationEntry &RE, unsigned SectionID)
uint64_t readBytesUnaligned(uint8_t *Src, unsigned Size) const
Endian-aware read Read the least significant Size bytes from Src.
unsigned getAnyRelocationPCRel(const MachO::any_relocation_info &RE) const
uint8_t * getSectionAddress(unsigned SectionID) const
Expected< relocation_iterator > processScatteredVANILLA(unsigned SectionID, relocation_iterator RelI, const ObjectFile &BaseObjT, RuntimeDyldMachO::ObjSectionToIDMap &ObjSectionToID)
Process a scattered vanilla relocation.
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.
static ErrorSuccess success()
Create a success value.
RuntimeDyldMachOI386(RuntimeDyld::MemoryManager &MM, JITSymbolResolver &Resolver)
unsigned getAnyRelocationLength(const MachO::any_relocation_info &RE) const
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 ...
int64_t Addend
Addend - the relocation addend encoded in the instruction itself.
uint32_t RelType
RelType - relocation type.
JITSymbolResolver & Resolver
uint8_t * createStubFunction(uint8_t *Addr, unsigned AbiVariant=0)
Emits long jump instruction to Addr.
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
uint64_t Offset
Offset - offset into the section.
std::map< SectionRef, unsigned > ObjSectionToIDMap
basic_symbol_iterator getSymbolByIndex(unsigned Index) const
unsigned getStubAlignment() override
MachO::dysymtab_command getDysymtabLoadCommand() const
SectionEntry - represents a section emitted into memory by the dynamic linker.
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
LLVM Value Representation.
Lightweight error class with error context and mandatory checking.
unsigned Size
The size of this relocation (MachO specific).
section_iterator section_end() const override
#define UNIMPLEMENTED_RELOC(RelType)
Error populateIndirectSymbolPointersSection(const MachOObjectFile &Obj, const SectionRef &PTSection, unsigned PTSectionID)
StringRef - Represent a constant reference to a string, i.e.
void makeValueAddendPCRel(RelocationValueRef &Value, const relocation_iterator &RI, unsigned OffsetToNextPC)
Make the RelocationValueRef addend PC-relative.
bool isRelocationScattered(const MachO::any_relocation_info &RE) const
Error finalizeSection(const ObjectFile &Obj, unsigned SectionID, const SectionRef &Section)
This is a value type class that represents a single section in the list of sections in the object fil...