#include "MCTargetDesc/PPCMCTargetDesc.h"
#include "MCTargetDesc/PPCFixupKinds.h"
+#include "MCTargetDesc/PPCMCExpr.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/MC/MCELF.h"
#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCValue.h"
public:
PPCELFObjectWriter(bool Is64Bit, uint8_t OSABI);
- virtual ~PPCELFObjectWriter();
protected:
- virtual unsigned getRelocTypeInner(const MCValue &Target,
- const MCFixup &Fixup,
- bool IsPCRel) const;
- virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
- bool IsPCRel, bool IsRelocWithSymbol,
- int64_t Addend) const;
- virtual const MCSymbol *ExplicitRelSym(const MCAssembler &Asm,
- const MCValue &Target,
- const MCFragment &F,
- const MCFixup &Fixup,
- bool IsPCRel) const;
- virtual const MCSymbol *undefinedExplicitRelSym(const MCValue &Target,
- 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;
};
}
Is64Bit ? ELF::EM_PPC64 : ELF::EM_PPC,
/*HasRelocationAddend*/ true) {}
-PPCELFObjectWriter::~PPCELFObjectWriter() {
+static MCSymbolRefExpr::VariantKind getAccessVariant(const MCValue &Target,
+ const MCFixup &Fixup) {
+ const MCExpr *Expr = Fixup.getValue();
+
+ if (Expr->getKind() != MCExpr::Target)
+ return Target.getAccessVariant();
+
+ switch (cast<PPCMCExpr>(Expr)->getKind()) {
+ case PPCMCExpr::VK_PPC_None:
+ return MCSymbolRefExpr::VK_None;
+ case PPCMCExpr::VK_PPC_LO:
+ return MCSymbolRefExpr::VK_PPC_LO;
+ case PPCMCExpr::VK_PPC_HI:
+ return MCSymbolRefExpr::VK_PPC_HI;
+ case PPCMCExpr::VK_PPC_HA:
+ return MCSymbolRefExpr::VK_PPC_HA;
+ case PPCMCExpr::VK_PPC_HIGHERA:
+ return MCSymbolRefExpr::VK_PPC_HIGHERA;
+ case PPCMCExpr::VK_PPC_HIGHER:
+ return MCSymbolRefExpr::VK_PPC_HIGHER;
+ case PPCMCExpr::VK_PPC_HIGHEST:
+ return MCSymbolRefExpr::VK_PPC_HIGHEST;
+ case PPCMCExpr::VK_PPC_HIGHESTA:
+ return MCSymbolRefExpr::VK_PPC_HIGHESTA;
+ }
+ llvm_unreachable("unknown PPCMCExpr kind");
}
-unsigned PPCELFObjectWriter::getRelocTypeInner(const MCValue &Target,
- const MCFixup &Fixup,
- bool IsPCRel) const
-{
- MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ?
- MCSymbolRefExpr::VK_None : Target.getSymA()->getKind();
+unsigned PPCELFObjectWriter::GetRelocType(const MCValue &Target,
+ const MCFixup &Fixup,
+ bool IsPCRel) const {
+ MCSymbolRefExpr::VariantKind Modifier = getAccessVariant(Target, Fixup);
// determine the type of the relocation
unsigned Type;
llvm_unreachable("Unimplemented");
case PPC::fixup_ppc_br24:
case PPC::fixup_ppc_br24abs:
- Type = ELF::R_PPC_REL24;
+ switch (Modifier) {
+ default: llvm_unreachable("Unsupported Modifier");
+ case MCSymbolRefExpr::VK_None:
+ Type = ELF::R_PPC_REL24;
+ break;
+ case MCSymbolRefExpr::VK_PLT:
+ Type = ELF::R_PPC_PLTREL24;
+ break;
+ case MCSymbolRefExpr::VK_PPC_LOCAL:
+ Type = ELF::R_PPC_LOCAL24PC;
+ break;
+ }
break;
case PPC::fixup_ppc_brcond14:
case PPC::fixup_ppc_brcond14abs:
Type = ELF::R_PPC64_DTPREL16_HIGHESTA;
break;
case MCSymbolRefExpr::VK_PPC_GOT_TLSGD:
- Type = ELF::R_PPC64_GOT_TLSGD16;
+ if (is64Bit())
+ Type = ELF::R_PPC64_GOT_TLSGD16;
+ else
+ Type = ELF::R_PPC_GOT_TLSGD16;
break;
case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO:
Type = ELF::R_PPC64_GOT_TLSGD16_LO;
Type = ELF::R_PPC64_GOT_TLSGD16_HA;
break;
case MCSymbolRefExpr::VK_PPC_GOT_TLSLD:
- Type = ELF::R_PPC64_GOT_TLSLD16;
+ if (is64Bit())
+ Type = ELF::R_PPC64_GOT_TLSLD16;
+ else
+ Type = ELF::R_PPC_GOT_TLSLD16;
break;
case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO:
Type = ELF::R_PPC64_GOT_TLSLD16_LO;
switch (Modifier) {
default: llvm_unreachable("Unsupported Modifier");
case MCSymbolRefExpr::VK_PPC_TLSGD:
- Type = ELF::R_PPC64_TLSGD;
+ if (is64Bit())
+ Type = ELF::R_PPC64_TLSGD;
+ else
+ Type = ELF::R_PPC_TLSGD;
break;
case MCSymbolRefExpr::VK_PPC_TLSLD:
- Type = ELF::R_PPC64_TLSLD;
+ if (is64Bit())
+ Type = ELF::R_PPC64_TLSLD;
+ else
+ Type = ELF::R_PPC_TLSLD;
break;
case MCSymbolRefExpr::VK_PPC_TLS:
- Type = ELF::R_PPC64_TLS;
+ if (is64Bit())
+ Type = ELF::R_PPC64_TLS;
+ else
+ Type = ELF::R_PPC_TLS;
break;
}
break;
return Type;
}
-unsigned PPCELFObjectWriter::GetRelocType(const MCValue &Target,
- const MCFixup &Fixup,
- bool IsPCRel,
- bool IsRelocWithSymbol,
- int64_t Addend) const {
- return getRelocTypeInner(Target, Fixup, IsPCRel);
-}
-
-const MCSymbol *PPCELFObjectWriter::ExplicitRelSym(const MCAssembler &Asm,
- const MCValue &Target,
- const MCFragment &F,
- const MCFixup &Fixup,
- bool IsPCRel) const {
- assert(Target.getSymA() && "SymA cannot be 0");
- MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ?
- MCSymbolRefExpr::VK_None : Target.getSymA()->getKind();
-
- bool EmitThisSym;
- switch (Modifier) {
- // GOT references always need a relocation, even if the
- // target symbol is local.
- case MCSymbolRefExpr::VK_GOT:
- case MCSymbolRefExpr::VK_PPC_GOT_LO:
- case MCSymbolRefExpr::VK_PPC_GOT_HI:
- case MCSymbolRefExpr::VK_PPC_GOT_HA:
- EmitThisSym = true;
- break;
- default:
- EmitThisSym = false;
- break;
- }
-
- if (EmitThisSym)
- return &Target.getSymA()->getSymbol().AliasedSymbol();
- return NULL;
-}
-
-const MCSymbol *PPCELFObjectWriter::undefinedExplicitRelSym(const MCValue &Target,
- const MCFixup &Fixup,
- bool IsPCRel) const {
- assert(Target.getSymA() && "SymA cannot be 0");
- const MCSymbol &Symbol = Target.getSymA()->getSymbol().AliasedSymbol();
-
- unsigned RelocType = getRelocTypeInner(Target, Fixup, IsPCRel);
-
- // The .odp creation emits a relocation against the symbol ".TOC." which
- // create a R_PPC64_TOC relocation. However the relocation symbol name
- // in final object creation should be NULL, since the symbol does not
- // really exist, it is just the reference to TOC base for the current
- // object file.
- bool EmitThisSym = RelocType != ELF::R_PPC64_TOC;
+bool PPCELFObjectWriter::needsRelocateWithSymbol(const MCSymbolData &SD,
+ unsigned Type) const {
+ switch (Type) {
+ default:
+ return false;
- if (EmitThisSym && !Symbol.isTemporary())
- return &Symbol;
- return NULL;
+ case ELF::R_PPC_REL24:
+ // If the target symbol has a local entry point, we must keep the
+ // target symbol to preserve that information for the linker.
+ // The "other" values are stored in the last 6 bits of the second byte.
+ // The traditional defines for STO values assume the full byte and thus
+ // the shift to pack it.
+ unsigned Other = MCELF::getOther(SD) << 2;
+ return (Other & ELF::STO_PPC64_LOCAL_MASK) != 0;
+ }
}
-MCObjectWriter *llvm::createPPCELFObjectWriter(raw_ostream &OS,
+MCObjectWriter *llvm::createPPCELFObjectWriter(raw_pwrite_stream &OS,
bool Is64Bit,
+ bool IsLittleEndian,
uint8_t OSABI) {
MCELFObjectTargetWriter *MOTW = new PPCELFObjectWriter(Is64Bit, OSABI);
- return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/false);
+ return createELFObjectWriter(MOTW, OS, IsLittleEndian);
}
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