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-rw-r--r--lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h118
1 files changed, 65 insertions, 53 deletions
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
index 3014b30773..c153ee1671 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
@@ -39,7 +39,6 @@ namespace llvm {
class ObjectBuffer;
class Twine;
-
/// SectionEntry - represents a section emitted into memory by the dynamic
/// linker.
class SectionEntry {
@@ -69,8 +68,9 @@ public:
SectionEntry(StringRef name, uint8_t *address, size_t size,
uintptr_t objAddress)
- : Name(name), Address(address), Size(size), LoadAddress((uintptr_t)address),
- StubOffset(size), ObjAddress(objAddress) {}
+ : Name(name), Address(address), Size(size),
+ LoadAddress((uintptr_t)address), StubOffset(size),
+ ObjAddress(objAddress) {}
};
/// RelocationEntry - used to represent relocations internally in the dynamic
@@ -101,33 +101,33 @@ public:
unsigned Size;
RelocationEntry(unsigned id, uint64_t offset, uint32_t type, int64_t addend)
- : SectionID(id), Offset(offset), RelType(type), Addend(addend),
- SymOffset(0), IsPCRel(false), Size(0) {}
+ : SectionID(id), Offset(offset), RelType(type), Addend(addend),
+ SymOffset(0), IsPCRel(false), Size(0) {}
RelocationEntry(unsigned id, uint64_t offset, uint32_t type, int64_t addend,
uint64_t symoffset)
- : SectionID(id), Offset(offset), RelType(type), Addend(addend),
- SymOffset(symoffset), IsPCRel(false), Size(0) {}
+ : SectionID(id), Offset(offset), RelType(type), Addend(addend),
+ SymOffset(symoffset), IsPCRel(false), Size(0) {}
RelocationEntry(unsigned id, uint64_t offset, uint32_t type, int64_t addend,
bool IsPCRel, unsigned Size)
- : SectionID(id), Offset(offset), RelType(type), Addend(addend),
- SymOffset(0), IsPCRel(IsPCRel), Size(Size) {}
+ : SectionID(id), Offset(offset), RelType(type), Addend(addend),
+ SymOffset(0), IsPCRel(IsPCRel), Size(Size) {}
};
class RelocationValueRef {
public:
- unsigned SectionID;
- uint64_t Offset;
- int64_t Addend;
+ unsigned SectionID;
+ uint64_t Offset;
+ int64_t Addend;
const char *SymbolName;
- RelocationValueRef(): SectionID(0), Offset(0), Addend(0), SymbolName(0) {}
+ RelocationValueRef() : SectionID(0), Offset(0), Addend(0), SymbolName(0) {}
inline bool operator==(const RelocationValueRef &Other) const {
return SectionID == Other.SectionID && Offset == Other.Offset &&
Addend == Other.Addend && SymbolName == Other.SymbolName;
}
- inline bool operator <(const RelocationValueRef &Other) const {
+ inline bool operator<(const RelocationValueRef &Other) const {
if (SectionID != Other.SectionID)
return SectionID < Other.SectionID;
if (Offset != Other.Offset)
@@ -149,7 +149,7 @@ protected:
SectionList Sections;
typedef unsigned SID; // Type for SectionIDs
- #define RTDYLD_INVALID_SECTION_ID ((SID)(-1))
+#define RTDYLD_INVALID_SECTION_ID ((SID)(-1))
// Keep a map of sections from object file to the SectionID which
// references it.
@@ -187,6 +187,10 @@ protected:
Triple::ArchType Arch;
bool IsTargetLittleEndian;
+ // True if all sections should be passed to the memory manager, false if only
+ // sections containing relocations should be. Defaults to 'false'.
+ bool ProcessAllSections;
+
// This mutex prevents simultaneously loading objects from two different
// threads. This keeps us from having to protect individual data structures
// and guarantees that section allocation requests to the memory manager
@@ -217,52 +221,49 @@ protected:
}
uint8_t *getSectionAddress(unsigned SectionID) {
- return (uint8_t*)Sections[SectionID].Address;
+ return (uint8_t *)Sections[SectionID].Address;
}
void writeInt16BE(uint8_t *Addr, uint16_t Value) {
if (IsTargetLittleEndian)
Value = sys::SwapByteOrder(Value);
- *Addr = (Value >> 8) & 0xFF;
- *(Addr+1) = Value & 0xFF;
+ *Addr = (Value >> 8) & 0xFF;
+ *(Addr + 1) = Value & 0xFF;
}
void writeInt32BE(uint8_t *Addr, uint32_t Value) {
if (IsTargetLittleEndian)
Value = sys::SwapByteOrder(Value);
- *Addr = (Value >> 24) & 0xFF;
- *(Addr+1) = (Value >> 16) & 0xFF;
- *(Addr+2) = (Value >> 8) & 0xFF;
- *(Addr+3) = Value & 0xFF;
+ *Addr = (Value >> 24) & 0xFF;
+ *(Addr + 1) = (Value >> 16) & 0xFF;
+ *(Addr + 2) = (Value >> 8) & 0xFF;
+ *(Addr + 3) = Value & 0xFF;
}
void writeInt64BE(uint8_t *Addr, uint64_t Value) {
if (IsTargetLittleEndian)
Value = sys::SwapByteOrder(Value);
- *Addr = (Value >> 56) & 0xFF;
- *(Addr+1) = (Value >> 48) & 0xFF;
- *(Addr+2) = (Value >> 40) & 0xFF;
- *(Addr+3) = (Value >> 32) & 0xFF;
- *(Addr+4) = (Value >> 24) & 0xFF;
- *(Addr+5) = (Value >> 16) & 0xFF;
- *(Addr+6) = (Value >> 8) & 0xFF;
- *(Addr+7) = Value & 0xFF;
+ *Addr = (Value >> 56) & 0xFF;
+ *(Addr + 1) = (Value >> 48) & 0xFF;
+ *(Addr + 2) = (Value >> 40) & 0xFF;
+ *(Addr + 3) = (Value >> 32) & 0xFF;
+ *(Addr + 4) = (Value >> 24) & 0xFF;
+ *(Addr + 5) = (Value >> 16) & 0xFF;
+ *(Addr + 6) = (Value >> 8) & 0xFF;
+ *(Addr + 7) = Value & 0xFF;
}
/// \brief Given the common symbols discovered in the object file, emit a
/// new section for them and update the symbol mappings in the object and
/// symbol table.
- void emitCommonSymbols(ObjectImage &Obj,
- const CommonSymbolMap &CommonSymbols,
- uint64_t TotalSize,
- SymbolTableMap &SymbolTable);
+ void emitCommonSymbols(ObjectImage &Obj, const CommonSymbolMap &CommonSymbols,
+ uint64_t TotalSize, SymbolTableMap &SymbolTable);
/// \brief Emits section data from the object file to the MemoryManager.
/// \param IsCode if it's true then allocateCodeSection() will be
/// used for emits, else allocateDataSection() will be used.
/// \return SectionID.
- unsigned emitSection(ObjectImage &Obj,
- const SectionRef &Section,
+ unsigned emitSection(ObjectImage &Obj, const SectionRef &Section,
bool IsCode);
/// \brief Find Section in LocalSections. If the secton is not found - emit
@@ -270,10 +271,8 @@ protected:
/// \param IsCode if it's true then allocateCodeSection() will be
/// used for emmits, else allocateDataSection() will be used.
/// \return SectionID.
- unsigned findOrEmitSection(ObjectImage &Obj,
- const SectionRef &Section,
- bool IsCode,
- ObjSectionToIDMap &LocalSections);
+ unsigned findOrEmitSection(ObjectImage &Obj, const SectionRef &Section,
+ bool IsCode, ObjSectionToIDMap &LocalSections);
// \brief Add a relocation entry that uses the given section.
void addRelocationForSection(const RelocationEntry &RE, unsigned SectionID);
@@ -284,7 +283,7 @@ protected:
/// \brief Emits long jump instruction to Addr.
/// \return Pointer to the memory area for emitting target address.
- uint8_t* createStubFunction(uint8_t *Addr);
+ uint8_t *createStubFunction(uint8_t *Addr);
/// \brief Resolves relocations from Relocs list with address from Value.
void resolveRelocationList(const RelocationList &Relocs, uint64_t Value);
@@ -294,14 +293,14 @@ protected:
/// \param Value Target symbol address to apply the relocation action
virtual void resolveRelocation(const RelocationEntry &RE, uint64_t Value) = 0;
- /// \brief Parses the object file relocation and stores it to Relocations
- /// or SymbolRelocations (this depends on the object file type).
- virtual void processRelocationRef(unsigned SectionID,
- RelocationRef RelI,
- ObjectImage &Obj,
- ObjSectionToIDMap &ObjSectionToID,
- const SymbolTableMap &Symbols,
- StubMap &Stubs) = 0;
+ /// \brief Parses one or more object file relocations (some object files use
+ /// relocation pairs) and stores it to Relocations or SymbolRelocations
+ /// (this depends on the object file type).
+ /// \return Iterator to the next relocation that needs to be parsed.
+ virtual relocation_iterator
+ processRelocationRef(unsigned SectionID, relocation_iterator RelI,
+ ObjectImage &Obj, ObjSectionToIDMap &ObjSectionToID,
+ const SymbolTableMap &Symbols, StubMap &Stubs) = 0;
/// \brief Resolve relocations to external symbols.
void resolveExternalSymbols();
@@ -310,13 +309,26 @@ protected:
// The base class does nothing. ELF overrides this.
virtual void updateGOTEntries(StringRef Name, uint64_t Addr) {}
- virtual ObjectImage *createObjectImage(ObjectBuffer *InputBuffer);
+ // \brief Compute an upper bound of the memory that is required to load all
+ // sections
+ void computeTotalAllocSize(ObjectImage &Obj, uint64_t &CodeSize,
+ uint64_t &DataSizeRO, uint64_t &DataSizeRW);
+
+ // \brief Compute the stub buffer size required for a section
+ unsigned computeSectionStubBufSize(ObjectImage &Obj,
+ const SectionRef &Section);
+
public:
- RuntimeDyldImpl(RTDyldMemoryManager *mm) : MemMgr(mm), HasError(false) {}
+ RuntimeDyldImpl(RTDyldMemoryManager *mm)
+ : MemMgr(mm), ProcessAllSections(false), HasError(false) {}
virtual ~RuntimeDyldImpl();
- ObjectImage *loadObject(ObjectBuffer *InputBuffer);
+ void setProcessAllSections(bool ProcessAllSections) {
+ this->ProcessAllSections = ProcessAllSections;
+ }
+
+ ObjectImage *loadObject(ObjectImage *InputObject);
void *getSymbolAddress(StringRef Name) {
// FIXME: Just look up as a function for now. Overly simple of course.
@@ -354,6 +366,7 @@ public:
StringRef getErrorString() { return ErrorStr; }
virtual bool isCompatibleFormat(const ObjectBuffer *Buffer) const = 0;
+ virtual bool isCompatibleFile(const ObjectFile *Obj) const = 0;
virtual void registerEHFrames();
@@ -364,5 +377,4 @@ public:
} // end namespace llvm
-
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-16 22:25:29 +0000