#ifndef LLVM_MC_MCELFOBJECTWRITER_H
#define LLVM_MC_MCELFOBJECTWRITER_H
-#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/ADT/Triple.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/ELF.h"
+#include <vector>
namespace llvm {
+class MCAssembler;
+class MCFixup;
+class MCFragment;
+class MCObjectWriter;
+class MCSymbol;
+class MCSymbolELF;
+class MCValue;
+class raw_pwrite_stream;
+
+struct ELFRelocationEntry {
+ uint64_t Offset; // Where is the relocation.
+ const MCSymbolELF *Symbol; // The symbol to relocate with.
+ unsigned Type; // The type of the relocation.
+ uint64_t Addend; // The addend to use.
+
+ ELFRelocationEntry(uint64_t Offset, const MCSymbolELF *Symbol, unsigned Type,
+ uint64_t Addend)
+ : Offset(Offset), Symbol(Symbol), Type(Type), Addend(Addend) {}
+};
+
class MCELFObjectTargetWriter {
const uint8_t OSABI;
const uint16_t EMachine;
const unsigned HasRelocationAddend : 1;
const unsigned Is64Bit : 1;
+ const unsigned IsN64 : 1;
protected:
MCELFObjectTargetWriter(bool Is64Bit_, uint8_t OSABI_,
- uint16_t EMachine_, bool HasRelocationAddend_);
+ uint16_t EMachine_, bool HasRelocationAddend,
+ bool IsN64=false);
public:
static uint8_t getOSABI(Triple::OSType OSType) {
switch (OSType) {
+ case Triple::CloudABI:
+ return ELF::ELFOSABI_CLOUDABI;
+ case Triple::PS4:
case Triple::FreeBSD:
return ELF::ELFOSABI_FREEBSD;
case Triple::Linux:
}
}
- virtual ~MCELFObjectTargetWriter();
+ virtual ~MCELFObjectTargetWriter() {}
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
- bool IsPCRel, bool IsRelocWithSymbol,
- int64_t Addend) const; // FIXME: add = 0
- virtual unsigned getEFlags() const;
- virtual const MCSymbol *ExplicitRelSym(const MCAssembler &Asm,
- const MCValue &Target,
- const MCFragment &F,
- const MCFixup &Fixup,
- bool IsPCRel) const;
-
- /// @name Accessors
+ bool IsPCRel) const = 0;
+
+ virtual bool needsRelocateWithSymbol(const MCSymbol &Sym,
+ unsigned Type) const;
+
+ virtual void sortRelocs(const MCAssembler &Asm,
+ std::vector<ELFRelocationEntry> &Relocs);
+
+ /// \name Accessors
/// @{
- uint8_t getOSABI() { return OSABI; }
- uint16_t getEMachine() { return EMachine; }
- bool hasRelocationAddend() { return HasRelocationAddend; }
+ uint8_t getOSABI() const { return OSABI; }
+ uint16_t getEMachine() const { return EMachine; }
+ bool hasRelocationAddend() const { return HasRelocationAddend; }
bool is64Bit() const { return Is64Bit; }
+ bool isN64() const { return IsN64; }
/// @}
+
+ // Instead of changing everyone's API we pack the N64 Type fields
+ // into the existing 32 bit data unsigned.
+#define R_TYPE_SHIFT 0
+#define R_TYPE_MASK 0xffffff00
+#define R_TYPE2_SHIFT 8
+#define R_TYPE2_MASK 0xffff00ff
+#define R_TYPE3_SHIFT 16
+#define R_TYPE3_MASK 0xff00ffff
+#define R_SSYM_SHIFT 24
+#define R_SSYM_MASK 0x00ffffff
+
+ // N64 relocation type accessors
+ uint8_t getRType(uint32_t Type) const {
+ return (unsigned)((Type >> R_TYPE_SHIFT) & 0xff);
+ }
+ uint8_t getRType2(uint32_t Type) const {
+ return (unsigned)((Type >> R_TYPE2_SHIFT) & 0xff);
+ }
+ uint8_t getRType3(uint32_t Type) const {
+ return (unsigned)((Type >> R_TYPE3_SHIFT) & 0xff);
+ }
+ uint8_t getRSsym(uint32_t Type) const {
+ return (unsigned)((Type >> R_SSYM_SHIFT) & 0xff);
+ }
+
+ // N64 relocation type setting
+ unsigned setRType(unsigned Value, unsigned Type) const {
+ return ((Type & R_TYPE_MASK) | ((Value & 0xff) << R_TYPE_SHIFT));
+ }
+ unsigned setRType2(unsigned Value, unsigned Type) const {
+ return (Type & R_TYPE2_MASK) | ((Value & 0xff) << R_TYPE2_SHIFT);
+ }
+ unsigned setRType3(unsigned Value, unsigned Type) const {
+ return (Type & R_TYPE3_MASK) | ((Value & 0xff) << R_TYPE3_SHIFT);
+ }
+ unsigned setRSsym(unsigned Value, unsigned Type) const {
+ return (Type & R_SSYM_MASK) | ((Value & 0xff) << R_SSYM_SHIFT);
+ }
};
/// \brief Construct a new ELF writer instance.
/// \param OS - The stream to write to.
/// \returns The constructed object writer.
MCObjectWriter *createELFObjectWriter(MCELFObjectTargetWriter *MOTW,
- raw_ostream &OS, bool IsLittleEndian);
-} // End llvm namespace
+ raw_pwrite_stream &OS,
+ bool IsLittleEndian);
+} // namespace llvm
#endif