#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/DataTypes.h"
+#include "llvm/Support/EndianStream.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
/// The object writer also contains a number of helper methods for writing
/// binary data to the output stream.
class MCObjectWriter {
- MCObjectWriter(const MCObjectWriter &) LLVM_DELETED_FUNCTION;
- void operator=(const MCObjectWriter &) LLVM_DELETED_FUNCTION;
+ MCObjectWriter(const MCObjectWriter &) = delete;
+ void operator=(const MCObjectWriter &) = delete;
protected:
- raw_ostream &OS;
+ raw_pwrite_stream &OS;
unsigned IsLittleEndian : 1;
protected: // Can only create subclasses.
- MCObjectWriter(raw_ostream &_OS, bool _IsLittleEndian)
- : OS(_OS), IsLittleEndian(_IsLittleEndian) {}
+ MCObjectWriter(raw_pwrite_stream &OS, bool IsLittleEndian)
+ : OS(OS), IsLittleEndian(IsLittleEndian) {}
public:
virtual ~MCObjectWriter();
raw_ostream &getStream() { return OS; }
- /// @name High-Level API
+ /// \name High-Level API
/// @{
/// \brief Perform any late binding of symbols (for example, to assign symbol
/// post layout binding. The implementation is responsible for storing
/// information about the relocation so that it can be emitted during
/// WriteObject().
- virtual void RecordRelocation(const MCAssembler &Asm,
- const MCAsmLayout &Layout,
+ virtual void RecordRelocation(MCAssembler &Asm, const MCAsmLayout &Layout,
const MCFragment *Fragment,
const MCFixup &Fixup, MCValue Target,
- bool &IsPCRel,
- uint64_t &FixedValue) = 0;
+ bool &IsPCRel, uint64_t &FixedValue) = 0;
/// \brief Check whether the difference (A - B) between two symbol
/// references is fully resolved.
///
/// Clients are not required to answer precisely and may conservatively return
/// false, even when a difference is fully resolved.
- bool
- IsSymbolRefDifferenceFullyResolved(const MCAssembler &Asm,
- const MCSymbolRefExpr *A,
- const MCSymbolRefExpr *B,
- bool InSet) const;
-
- virtual bool
- IsSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm,
- const MCSymbolData &DataA,
- const MCFragment &FB,
- bool InSet,
- bool IsPCRel) const;
+ bool IsSymbolRefDifferenceFullyResolved(const MCAssembler &Asm,
+ const MCSymbolRefExpr *A,
+ const MCSymbolRefExpr *B,
+ bool InSet) const;
+
+ virtual bool IsSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm,
+ const MCSymbolData &DataA,
+ const MCFragment &FB,
+ bool InSet,
+ bool IsPCRel) const;
+
+ /// \brief True if this symbol (which is a variable) is weak. This is not
+ /// just STB_WEAK, but more generally whether or not we can evaluate
+ /// past it.
+ virtual bool isWeak(const MCSymbolData &SD) const;
/// \brief Write the object file.
///
const MCAsmLayout &Layout) = 0;
/// @}
- /// @name Binary Output
+ /// \name Binary Output
/// @{
void Write8(uint8_t Value) {
}
void WriteLE16(uint16_t Value) {
- Write8(uint8_t(Value >> 0));
- Write8(uint8_t(Value >> 8));
+ support::endian::Writer<support::little>(OS).write(Value);
}
void WriteLE32(uint32_t Value) {
- WriteLE16(uint16_t(Value >> 0));
- WriteLE16(uint16_t(Value >> 16));
+ support::endian::Writer<support::little>(OS).write(Value);
}
void WriteLE64(uint64_t Value) {
- WriteLE32(uint32_t(Value >> 0));
- WriteLE32(uint32_t(Value >> 32));
+ support::endian::Writer<support::little>(OS).write(Value);
}
void WriteBE16(uint16_t Value) {
- Write8(uint8_t(Value >> 8));
- Write8(uint8_t(Value >> 0));
+ support::endian::Writer<support::big>(OS).write(Value);
}
void WriteBE32(uint32_t Value) {
- WriteBE16(uint16_t(Value >> 16));
- WriteBE16(uint16_t(Value >> 0));
+ support::endian::Writer<support::big>(OS).write(Value);
}
void WriteBE64(uint64_t Value) {
- WriteBE32(uint32_t(Value >> 32));
- WriteBE32(uint32_t(Value >> 0));
+ support::endian::Writer<support::big>(OS).write(Value);
}
void Write16(uint16_t Value) {