//
//===----------------------------------------------------------------------===//
-#include "llvm/MC/MCAsmBackend.h"
#include "MCTargetDesc/PPCMCTargetDesc.h"
#include "MCTargetDesc/PPCFixupKinds.h"
+#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCELFObjectWriter.h"
+#include "llvm/MC/MCFixupKindInfo.h"
#include "llvm/MC/MCMachObjectWriter.h"
-#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCValue.h"
#include "llvm/Object/MachOFormat.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
-static unsigned adjustFixupValue(unsigned Kind, uint64_t Value) {
+static uint64_t adjustFixupValue(unsigned Kind, uint64_t Value) {
switch (Kind) {
default:
llvm_unreachable("Unknown fixup kind!");
case FK_Data_1:
case FK_Data_2:
case FK_Data_4:
+ case FK_Data_8:
+ case PPC::fixup_ppc_nofixup:
return Value;
case PPC::fixup_ppc_brcond14:
- return Value & 0x3ffc;
+ case PPC::fixup_ppc_brcond14abs:
+ return Value & 0xfffc;
case PPC::fixup_ppc_br24:
+ case PPC::fixup_ppc_br24abs:
return Value & 0x3fffffc;
-#if 0
- case PPC::fixup_ppc_hi16:
- return (Value >> 16) & 0xffff;
-#endif
- case PPC::fixup_ppc_ha16:
- return ((Value >> 16) + ((Value & 0x8000) ? 1 : 0)) & 0xffff;
- case PPC::fixup_ppc_lo16:
+ case PPC::fixup_ppc_half16:
return Value & 0xffff;
+ case PPC::fixup_ppc_half16ds:
+ return Value & 0xfffc;
+ }
+}
+
+static unsigned getFixupKindNumBytes(unsigned Kind) {
+ switch (Kind) {
+ default:
+ llvm_unreachable("Unknown fixup kind!");
+ case FK_Data_1:
+ return 1;
+ case FK_Data_2:
+ case PPC::fixup_ppc_half16:
+ case PPC::fixup_ppc_half16ds:
+ return 2;
+ case FK_Data_4:
+ case PPC::fixup_ppc_brcond14:
+ case PPC::fixup_ppc_brcond14abs:
+ case PPC::fixup_ppc_br24:
+ case PPC::fixup_ppc_br24abs:
+ return 4;
+ case FK_Data_8:
+ return 8;
+ case PPC::fixup_ppc_nofixup:
+ return 0;
}
}
void RecordRelocation(MachObjectWriter *Writer,
const MCAssembler &Asm, const MCAsmLayout &Layout,
const MCFragment *Fragment, const MCFixup &Fixup,
- MCValue Target, uint64_t &FixedValue) {}
+ MCValue Target, uint64_t &FixedValue) {
+ llvm_unreachable("Relocation emission for MachO/PPC unimplemented!");
+ }
};
class PPCAsmBackend : public MCAsmBackend {
// name offset bits flags
{ "fixup_ppc_br24", 6, 24, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_ppc_brcond14", 16, 14, MCFixupKindInfo::FKF_IsPCRel },
- { "fixup_ppc_lo16", 16, 16, 0 },
- { "fixup_ppc_ha16", 16, 16, 0 },
- { "fixup_ppc_lo14", 16, 14, 0 }
+ { "fixup_ppc_br24abs", 6, 24, 0 },
+ { "fixup_ppc_brcond14abs", 16, 14, 0 },
+ { "fixup_ppc_half16", 0, 16, 0 },
+ { "fixup_ppc_half16ds", 0, 14, 0 },
+ { "fixup_ppc_nofixup", 0, 0, 0 }
};
if (Kind < FirstTargetFixupKind)
return Infos[Kind - FirstTargetFixupKind];
}
+ void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
+ uint64_t Value) const {
+ Value = adjustFixupValue(Fixup.getKind(), Value);
+ if (!Value) return; // Doesn't change encoding.
+
+ unsigned Offset = Fixup.getOffset();
+ unsigned NumBytes = getFixupKindNumBytes(Fixup.getKind());
+
+ // For each byte of the fragment that the fixup touches, mask in the bits
+ // from the fixup value. The Value has been "split up" into the appropriate
+ // bitfields above.
+ for (unsigned i = 0; i != NumBytes; ++i)
+ Data[Offset + i] |= uint8_t((Value >> ((NumBytes - i - 1)*8)) & 0xff);
+ }
+
bool mayNeedRelaxation(const MCInst &Inst) const {
// FIXME.
return false;
bool fixupNeedsRelaxation(const MCFixup &Fixup,
uint64_t Value,
- const MCInstFragment *DF,
+ const MCRelaxableFragment *DF,
const MCAsmLayout &Layout) const {
// FIXME.
llvm_unreachable("relaxInstruction() unimplemented");
}
bool writeNopData(uint64_t Count, MCObjectWriter *OW) const {
- // FIXME: Zero fill for now. That's not right, but at least will get the
- // section size right.
- for (uint64_t i = 0; i != Count; ++i)
- OW->Write8(0);
+ // Can't emit NOP with size not multiple of 32-bits
+ if (Count % 4 != 0)
+ return false;
+
+ uint64_t NumNops = Count / 4;
+ for (uint64_t i = 0; i != NumNops; ++i)
+ OW->Write32(0x60000000);
+
return true;
}
unsigned getPointerSize() const {
StringRef Name = TheTarget.getName();
- if (Name == "ppc64") return 8;
+ if (Name == "ppc64" || Name == "ppc64le") return 8;
assert(Name == "ppc32" && "Unknown target name!");
return 4;
}
public:
DarwinPPCAsmBackend(const Target &T) : PPCAsmBackend(T) { }
- void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
- uint64_t Value) const {
- llvm_unreachable("UNIMP");
- }
-
MCObjectWriter *createObjectWriter(raw_ostream &OS) const {
bool is64 = getPointerSize() == 8;
return createMachObjectWriter(new PPCMachObjectWriter(
ELFPPCAsmBackend(const Target &T, uint8_t OSABI) :
PPCAsmBackend(T), OSABI(OSABI) { }
- void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
- uint64_t Value) const {
- Value = adjustFixupValue(Fixup.getKind(), Value);
- if (!Value) return; // Doesn't change encoding.
-
- unsigned Offset = Fixup.getOffset();
-
- // For each byte of the fragment that the fixup touches, mask in the bits from
- // the fixup value. The Value has been "split up" into the appropriate
- // bitfields above.
- for (unsigned i = 0; i != 4; ++i)
- Data[Offset + i] |= uint8_t((Value >> ((4 - i - 1)*8)) & 0xff);
- }
MCObjectWriter *createObjectWriter(raw_ostream &OS) const {
bool is64 = getPointerSize() == 8;
-MCAsmBackend *llvm::createPPCAsmBackend(const Target &T, StringRef TT) {
+MCAsmBackend *llvm::createPPCAsmBackend(const Target &T, StringRef TT, StringRef CPU) {
if (Triple(TT).isOSDarwin())
return new DarwinPPCAsmBackend(T);