//
//===----------------------------------------------------------------------===//
+#include "MCTargetDesc/MipsBaseInfo.h"
#include "MCTargetDesc/MipsFixupKinds.h"
#include "MCTargetDesc/MipsMCTargetDesc.h"
+#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCValue.h"
#include "llvm/Support/ErrorHandling.h"
+#include <list>
using namespace llvm;
namespace {
class MipsELFObjectWriter : public MCELFObjectTargetWriter {
public:
- MipsELFObjectWriter(uint8_t OSABI);
+ MipsELFObjectWriter(bool _is64Bit, uint8_t OSABI,
+ bool _isN64, bool IsLittleEndian);
virtual ~MipsELFObjectWriter();
- virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
- bool IsPCRel, bool IsRelocWithSymbol,
- int64_t Addend) const;
- virtual unsigned getEFlags() const;
- virtual const MCSymbol *ExplicitRelSym(const MCAssembler &Asm,
- const MCValue &Target,
- const MCFragment &F,
- const MCFixup &Fixup,
- bool IsPCRel) const;
+ unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
+ bool IsPCRel) const override;
+ bool needsRelocateWithSymbol(const MCSymbolData &SD,
+ unsigned Type) const override;
};
}
-MipsELFObjectWriter::MipsELFObjectWriter(uint8_t OSABI)
- : MCELFObjectTargetWriter(/*Is64Bit*/ false, OSABI, ELF::EM_MIPS,
- /*HasRelocationAddend*/ false) {}
+MipsELFObjectWriter::MipsELFObjectWriter(bool _is64Bit, uint8_t OSABI,
+ bool _isN64, bool IsLittleEndian)
+ : MCELFObjectTargetWriter(_is64Bit, OSABI, ELF::EM_MIPS,
+ /*HasRelocationAddend*/ (_isN64) ? true : false,
+ /*IsN64*/ _isN64) {}
MipsELFObjectWriter::~MipsELFObjectWriter() {}
-// FIXME: get the real EABI Version from the Triple.
-unsigned MipsELFObjectWriter::getEFlags() const {
- return ELF::EF_MIPS_NOREORDER | ELF::EF_MIPS_ARCH_32R2;
-}
-
-const MCSymbol *MipsELFObjectWriter::ExplicitRelSym(const MCAssembler &Asm,
- const MCValue &Target,
- const MCFragment &F,
- const MCFixup &Fixup,
- bool IsPCRel) const {
- assert(Target.getSymA() && "SymA cannot be 0.");
- const MCSymbol &Sym = Target.getSymA()->getSymbol().AliasedSymbol();
-
- if (Sym.getSection().getKind().isMergeableCString() ||
- Sym.getSection().getKind().isMergeableConst())
- return &Sym;
-
- return NULL;
-}
-
unsigned MipsELFObjectWriter::GetRelocType(const MCValue &Target,
const MCFixup &Fixup,
- bool IsPCRel,
- bool IsRelocWithSymbol,
- int64_t Addend) const {
+ bool IsPCRel) const {
// determine the type of the relocation
unsigned Type = (unsigned)ELF::R_MIPS_NONE;
unsigned Kind = (unsigned)Fixup.getKind();
case FK_Data_4:
Type = ELF::R_MIPS_32;
break;
+ case FK_Data_8:
+ Type = ELF::R_MIPS_64;
+ break;
case FK_GPRel_4:
- Type = ELF::R_MIPS_GPREL32;
+ if (isN64()) {
+ Type = setRType((unsigned)ELF::R_MIPS_GPREL32, Type);
+ Type = setRType2((unsigned)ELF::R_MIPS_64, Type);
+ Type = setRType3((unsigned)ELF::R_MIPS_NONE, Type);
+ }
+ else
+ Type = ELF::R_MIPS_GPREL32;
break;
case Mips::fixup_Mips_GPREL16:
Type = ELF::R_MIPS_GPREL16;
case Mips::fixup_Mips_PC16:
Type = ELF::R_MIPS_PC16;
break;
+ case Mips::fixup_Mips_GOT_PAGE:
+ Type = ELF::R_MIPS_GOT_PAGE;
+ break;
+ case Mips::fixup_Mips_GOT_OFST:
+ Type = ELF::R_MIPS_GOT_OFST;
+ break;
+ case Mips::fixup_Mips_GOT_DISP:
+ Type = ELF::R_MIPS_GOT_DISP;
+ break;
+ case Mips::fixup_Mips_GPOFF_HI:
+ Type = setRType((unsigned)ELF::R_MIPS_GPREL16, Type);
+ Type = setRType2((unsigned)ELF::R_MIPS_SUB, Type);
+ Type = setRType3((unsigned)ELF::R_MIPS_HI16, Type);
+ break;
+ case Mips::fixup_Mips_GPOFF_LO:
+ Type = setRType((unsigned)ELF::R_MIPS_GPREL16, Type);
+ Type = setRType2((unsigned)ELF::R_MIPS_SUB, Type);
+ Type = setRType3((unsigned)ELF::R_MIPS_LO16, Type);
+ break;
+ case Mips::fixup_Mips_HIGHER:
+ Type = ELF::R_MIPS_HIGHER;
+ break;
+ case Mips::fixup_Mips_HIGHEST:
+ Type = ELF::R_MIPS_HIGHEST;
+ break;
+ case Mips::fixup_Mips_GOT_HI16:
+ Type = ELF::R_MIPS_GOT_HI16;
+ break;
+ case Mips::fixup_Mips_GOT_LO16:
+ Type = ELF::R_MIPS_GOT_LO16;
+ break;
+ case Mips::fixup_Mips_CALL_HI16:
+ Type = ELF::R_MIPS_CALL_HI16;
+ break;
+ case Mips::fixup_Mips_CALL_LO16:
+ Type = ELF::R_MIPS_CALL_LO16;
+ break;
+ case Mips::fixup_MICROMIPS_26_S1:
+ Type = ELF::R_MICROMIPS_26_S1;
+ break;
+ case Mips::fixup_MICROMIPS_HI16:
+ Type = ELF::R_MICROMIPS_HI16;
+ break;
+ case Mips::fixup_MICROMIPS_LO16:
+ Type = ELF::R_MICROMIPS_LO16;
+ break;
+ case Mips::fixup_MICROMIPS_GOT16:
+ Type = ELF::R_MICROMIPS_GOT16;
+ break;
+ case Mips::fixup_MICROMIPS_PC16_S1:
+ Type = ELF::R_MICROMIPS_PC16_S1;
+ break;
+ case Mips::fixup_MICROMIPS_CALL16:
+ Type = ELF::R_MICROMIPS_CALL16;
+ break;
+ case Mips::fixup_MICROMIPS_GOT_DISP:
+ Type = ELF::R_MICROMIPS_GOT_DISP;
+ break;
+ case Mips::fixup_MICROMIPS_GOT_PAGE:
+ Type = ELF::R_MICROMIPS_GOT_PAGE;
+ break;
+ case Mips::fixup_MICROMIPS_GOT_OFST:
+ Type = ELF::R_MICROMIPS_GOT_OFST;
+ break;
+ case Mips::fixup_MICROMIPS_TLS_GD:
+ Type = ELF::R_MICROMIPS_TLS_GD;
+ break;
+ case Mips::fixup_MICROMIPS_TLS_LDM:
+ Type = ELF::R_MICROMIPS_TLS_LDM;
+ break;
+ case Mips::fixup_MICROMIPS_TLS_DTPREL_HI16:
+ Type = ELF::R_MICROMIPS_TLS_DTPREL_HI16;
+ break;
+ case Mips::fixup_MICROMIPS_TLS_DTPREL_LO16:
+ Type = ELF::R_MICROMIPS_TLS_DTPREL_LO16;
+ break;
+ case Mips::fixup_MICROMIPS_TLS_TPREL_HI16:
+ Type = ELF::R_MICROMIPS_TLS_TPREL_HI16;
+ break;
+ case Mips::fixup_MICROMIPS_TLS_TPREL_LO16:
+ Type = ELF::R_MICROMIPS_TLS_TPREL_LO16;
+ break;
+ case Mips::fixup_MIPS_PC19_S2:
+ Type = ELF::R_MIPS_PC19_S2;
+ break;
+ case Mips::fixup_MIPS_PC18_S3:
+ Type = ELF::R_MIPS_PC18_S3;
+ break;
+ case Mips::fixup_MIPS_PC21_S2:
+ Type = ELF::R_MIPS_PC21_S2;
+ break;
+ case Mips::fixup_MIPS_PC26_S2:
+ Type = ELF::R_MIPS_PC26_S2;
+ break;
+ case Mips::fixup_MIPS_PCHI16:
+ Type = ELF::R_MIPS_PCHI16;
+ break;
+ case Mips::fixup_MIPS_PCLO16:
+ Type = ELF::R_MIPS_PCLO16;
+ break;
}
-
return Type;
}
-MCObjectWriter *llvm::createMipsELFObjectWriter(raw_ostream &OS, uint8_t OSABI,
- bool IsLittleEndian) {
- MCELFObjectTargetWriter *MOTW = new MipsELFObjectWriter(OSABI);
+bool
+MipsELFObjectWriter::needsRelocateWithSymbol(const MCSymbolData &SD,
+ unsigned Type) const {
+ // FIXME: This is extremelly conservative. This really needs to use a
+ // whitelist with a clear explanation for why each realocation needs to
+ // point to the symbol, not to the section.
+ switch (Type) {
+ default:
+ return true;
+
+ case ELF::R_MIPS_GOT16:
+ case ELF::R_MIPS16_GOT16:
+ case ELF::R_MICROMIPS_GOT16:
+ llvm_unreachable("Should have been handled already");
+
+ // These relocations might be paired with another relocation. The pairing is
+ // done by the static linker by matching the symbol. Since we only see one
+ // relocation at a time, we have to force them to relocate with a symbol to
+ // avoid ending up with a pair where one points to a section and another
+ // points to a symbol.
+ case ELF::R_MIPS_HI16:
+ case ELF::R_MIPS16_HI16:
+ case ELF::R_MICROMIPS_HI16:
+ case ELF::R_MIPS_LO16:
+ case ELF::R_MIPS16_LO16:
+ case ELF::R_MICROMIPS_LO16:
+ return true;
+
+ case ELF::R_MIPS_26:
+ case ELF::R_MIPS_32:
+ case ELF::R_MIPS_64:
+ case ELF::R_MIPS_GPREL16:
+ return false;
+ }
+}
+
+MCObjectWriter *llvm::createMipsELFObjectWriter(raw_ostream &OS,
+ uint8_t OSABI,
+ bool IsLittleEndian,
+ bool Is64Bit) {
+ MCELFObjectTargetWriter *MOTW = new MipsELFObjectWriter(Is64Bit, OSABI,
+ (Is64Bit) ? true : false,
+ IsLittleEndian);
return createELFObjectWriter(MOTW, OS, IsLittleEndian);
}
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