| //===-- MipsTargetStreamer.cpp - Mips Target Streamer Methods -------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file provides Mips specific target streamer methods. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "InstPrinter/MipsInstPrinter.h" |
| #include "MipsELFStreamer.h" |
| #include "MipsMCTargetDesc.h" |
| #include "MipsTargetObjectFile.h" |
| #include "MipsTargetStreamer.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/MC/MCSectionELF.h" |
| #include "llvm/MC/MCSubtargetInfo.h" |
| #include "llvm/MC/MCSymbolELF.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/ELF.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/FormattedStream.h" |
| |
| using namespace llvm; |
| |
| MipsTargetStreamer::MipsTargetStreamer(MCStreamer &S) |
| : MCTargetStreamer(S), ModuleDirectiveAllowed(true) { |
| GPRInfoSet = FPRInfoSet = FrameInfoSet = false; |
| } |
| void MipsTargetStreamer::emitDirectiveSetMicroMips() {} |
| void MipsTargetStreamer::emitDirectiveSetNoMicroMips() {} |
| void MipsTargetStreamer::emitDirectiveSetMips16() {} |
| void MipsTargetStreamer::emitDirectiveSetNoMips16() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetReorder() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetNoReorder() {} |
| void MipsTargetStreamer::emitDirectiveSetMacro() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetNoMacro() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMsa() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetNoMsa() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetAt() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetAtWithArg(unsigned RegNo) { |
| forbidModuleDirective(); |
| } |
| void MipsTargetStreamer::emitDirectiveSetNoAt() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveEnd(StringRef Name) {} |
| void MipsTargetStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {} |
| void MipsTargetStreamer::emitDirectiveAbiCalls() {} |
| void MipsTargetStreamer::emitDirectiveNaN2008() {} |
| void MipsTargetStreamer::emitDirectiveNaNLegacy() {} |
| void MipsTargetStreamer::emitDirectiveOptionPic0() {} |
| void MipsTargetStreamer::emitDirectiveOptionPic2() {} |
| void MipsTargetStreamer::emitDirectiveInsn() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitFrame(unsigned StackReg, unsigned StackSize, |
| unsigned ReturnReg) {} |
| void MipsTargetStreamer::emitMask(unsigned CPUBitmask, int CPUTopSavedRegOff) {} |
| void MipsTargetStreamer::emitFMask(unsigned FPUBitmask, int FPUTopSavedRegOff) { |
| } |
| void MipsTargetStreamer::emitDirectiveSetArch(StringRef Arch) { |
| forbidModuleDirective(); |
| } |
| void MipsTargetStreamer::emitDirectiveSetMips0() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips1() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips2() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips3() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips4() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips5() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips32() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips32R2() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips32R3() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips32R5() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips32R6() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips64() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips64R2() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips64R3() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips64R5() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetMips64R6() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetPop() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetPush() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetSoftFloat() { |
| forbidModuleDirective(); |
| } |
| void MipsTargetStreamer::emitDirectiveSetHardFloat() { |
| forbidModuleDirective(); |
| } |
| void MipsTargetStreamer::emitDirectiveSetDsp() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetNoDsp() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveCpLoad(unsigned RegNo) {} |
| void MipsTargetStreamer::emitDirectiveCpRestore( |
| SmallVector<MCInst, 3> &StoreInsts, int Offset) { |
| forbidModuleDirective(); |
| } |
| void MipsTargetStreamer::emitDirectiveCpsetup(unsigned RegNo, int RegOrOffset, |
| const MCSymbol &Sym, bool IsReg) { |
| } |
| void MipsTargetStreamer::emitDirectiveCpreturn(unsigned SaveLocation, |
| bool SaveLocationIsRegister) {} |
| |
| void MipsTargetStreamer::emitDirectiveModuleFP() {} |
| |
| void MipsTargetStreamer::emitDirectiveModuleOddSPReg() { |
| if (!ABIFlagsSection.OddSPReg && !ABIFlagsSection.Is32BitABI) |
| report_fatal_error("+nooddspreg is only valid for O32"); |
| } |
| void MipsTargetStreamer::emitDirectiveModuleSoftFloat() {} |
| void MipsTargetStreamer::emitDirectiveModuleHardFloat() {} |
| void MipsTargetStreamer::emitDirectiveSetFp( |
| MipsABIFlagsSection::FpABIKind Value) { |
| forbidModuleDirective(); |
| } |
| void MipsTargetStreamer::emitDirectiveSetOddSPReg() { forbidModuleDirective(); } |
| void MipsTargetStreamer::emitDirectiveSetNoOddSPReg() { |
| forbidModuleDirective(); |
| } |
| |
| MipsTargetAsmStreamer::MipsTargetAsmStreamer(MCStreamer &S, |
| formatted_raw_ostream &OS) |
| : MipsTargetStreamer(S), OS(OS) {} |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMicroMips() { |
| OS << "\t.set\tmicromips\n"; |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetNoMicroMips() { |
| OS << "\t.set\tnomicromips\n"; |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips16() { |
| OS << "\t.set\tmips16\n"; |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetNoMips16() { |
| OS << "\t.set\tnomips16\n"; |
| MipsTargetStreamer::emitDirectiveSetNoMips16(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetReorder() { |
| OS << "\t.set\treorder\n"; |
| MipsTargetStreamer::emitDirectiveSetReorder(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetNoReorder() { |
| OS << "\t.set\tnoreorder\n"; |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMacro() { |
| OS << "\t.set\tmacro\n"; |
| MipsTargetStreamer::emitDirectiveSetMacro(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetNoMacro() { |
| OS << "\t.set\tnomacro\n"; |
| MipsTargetStreamer::emitDirectiveSetNoMacro(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMsa() { |
| OS << "\t.set\tmsa\n"; |
| MipsTargetStreamer::emitDirectiveSetMsa(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetNoMsa() { |
| OS << "\t.set\tnomsa\n"; |
| MipsTargetStreamer::emitDirectiveSetNoMsa(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetAt() { |
| OS << "\t.set\tat\n"; |
| MipsTargetStreamer::emitDirectiveSetAt(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetAtWithArg(unsigned RegNo) { |
| OS << "\t.set\tat=$" << Twine(RegNo) << "\n"; |
| MipsTargetStreamer::emitDirectiveSetAtWithArg(RegNo); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetNoAt() { |
| OS << "\t.set\tnoat\n"; |
| MipsTargetStreamer::emitDirectiveSetNoAt(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveEnd(StringRef Name) { |
| OS << "\t.end\t" << Name << '\n'; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveEnt(const MCSymbol &Symbol) { |
| OS << "\t.ent\t" << Symbol.getName() << '\n'; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveAbiCalls() { OS << "\t.abicalls\n"; } |
| |
| void MipsTargetAsmStreamer::emitDirectiveNaN2008() { OS << "\t.nan\t2008\n"; } |
| |
| void MipsTargetAsmStreamer::emitDirectiveNaNLegacy() { |
| OS << "\t.nan\tlegacy\n"; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveOptionPic0() { |
| OS << "\t.option\tpic0\n"; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveOptionPic2() { |
| OS << "\t.option\tpic2\n"; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveInsn() { |
| MipsTargetStreamer::emitDirectiveInsn(); |
| OS << "\t.insn\n"; |
| } |
| |
| void MipsTargetAsmStreamer::emitFrame(unsigned StackReg, unsigned StackSize, |
| unsigned ReturnReg) { |
| OS << "\t.frame\t$" |
| << StringRef(MipsInstPrinter::getRegisterName(StackReg)).lower() << "," |
| << StackSize << ",$" |
| << StringRef(MipsInstPrinter::getRegisterName(ReturnReg)).lower() << '\n'; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetArch(StringRef Arch) { |
| OS << "\t.set arch=" << Arch << "\n"; |
| MipsTargetStreamer::emitDirectiveSetArch(Arch); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips0() { |
| OS << "\t.set\tmips0\n"; |
| MipsTargetStreamer::emitDirectiveSetMips0(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips1() { |
| OS << "\t.set\tmips1\n"; |
| MipsTargetStreamer::emitDirectiveSetMips1(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips2() { |
| OS << "\t.set\tmips2\n"; |
| MipsTargetStreamer::emitDirectiveSetMips2(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips3() { |
| OS << "\t.set\tmips3\n"; |
| MipsTargetStreamer::emitDirectiveSetMips3(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips4() { |
| OS << "\t.set\tmips4\n"; |
| MipsTargetStreamer::emitDirectiveSetMips4(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips5() { |
| OS << "\t.set\tmips5\n"; |
| MipsTargetStreamer::emitDirectiveSetMips5(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips32() { |
| OS << "\t.set\tmips32\n"; |
| MipsTargetStreamer::emitDirectiveSetMips32(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips32R2() { |
| OS << "\t.set\tmips32r2\n"; |
| MipsTargetStreamer::emitDirectiveSetMips32R2(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips32R3() { |
| OS << "\t.set\tmips32r3\n"; |
| MipsTargetStreamer::emitDirectiveSetMips32R3(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips32R5() { |
| OS << "\t.set\tmips32r5\n"; |
| MipsTargetStreamer::emitDirectiveSetMips32R5(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips32R6() { |
| OS << "\t.set\tmips32r6\n"; |
| MipsTargetStreamer::emitDirectiveSetMips32R6(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips64() { |
| OS << "\t.set\tmips64\n"; |
| MipsTargetStreamer::emitDirectiveSetMips64(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips64R2() { |
| OS << "\t.set\tmips64r2\n"; |
| MipsTargetStreamer::emitDirectiveSetMips64R2(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips64R3() { |
| OS << "\t.set\tmips64r3\n"; |
| MipsTargetStreamer::emitDirectiveSetMips64R3(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips64R5() { |
| OS << "\t.set\tmips64r5\n"; |
| MipsTargetStreamer::emitDirectiveSetMips64R5(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetMips64R6() { |
| OS << "\t.set\tmips64r6\n"; |
| MipsTargetStreamer::emitDirectiveSetMips64R6(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetDsp() { |
| OS << "\t.set\tdsp\n"; |
| MipsTargetStreamer::emitDirectiveSetDsp(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetNoDsp() { |
| OS << "\t.set\tnodsp\n"; |
| MipsTargetStreamer::emitDirectiveSetNoDsp(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetPop() { |
| OS << "\t.set\tpop\n"; |
| MipsTargetStreamer::emitDirectiveSetPop(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetPush() { |
| OS << "\t.set\tpush\n"; |
| MipsTargetStreamer::emitDirectiveSetPush(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetSoftFloat() { |
| OS << "\t.set\tsoftfloat\n"; |
| MipsTargetStreamer::emitDirectiveSetSoftFloat(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetHardFloat() { |
| OS << "\t.set\thardfloat\n"; |
| MipsTargetStreamer::emitDirectiveSetHardFloat(); |
| } |
| |
| // Print a 32 bit hex number with all numbers. |
| static void printHex32(unsigned Value, raw_ostream &OS) { |
| OS << "0x"; |
| for (int i = 7; i >= 0; i--) |
| OS.write_hex((Value & (0xF << (i * 4))) >> (i * 4)); |
| } |
| |
| void MipsTargetAsmStreamer::emitMask(unsigned CPUBitmask, |
| int CPUTopSavedRegOff) { |
| OS << "\t.mask \t"; |
| printHex32(CPUBitmask, OS); |
| OS << ',' << CPUTopSavedRegOff << '\n'; |
| } |
| |
| void MipsTargetAsmStreamer::emitFMask(unsigned FPUBitmask, |
| int FPUTopSavedRegOff) { |
| OS << "\t.fmask\t"; |
| printHex32(FPUBitmask, OS); |
| OS << "," << FPUTopSavedRegOff << '\n'; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveCpLoad(unsigned RegNo) { |
| OS << "\t.cpload\t$" |
| << StringRef(MipsInstPrinter::getRegisterName(RegNo)).lower() << "\n"; |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveCpRestore( |
| SmallVector<MCInst, 3> &StoreInsts, int Offset) { |
| MipsTargetStreamer::emitDirectiveCpRestore(StoreInsts, Offset); |
| OS << "\t.cprestore\t" << Offset << "\n"; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveCpsetup(unsigned RegNo, |
| int RegOrOffset, |
| const MCSymbol &Sym, |
| bool IsReg) { |
| OS << "\t.cpsetup\t$" |
| << StringRef(MipsInstPrinter::getRegisterName(RegNo)).lower() << ", "; |
| |
| if (IsReg) |
| OS << "$" |
| << StringRef(MipsInstPrinter::getRegisterName(RegOrOffset)).lower(); |
| else |
| OS << RegOrOffset; |
| |
| OS << ", "; |
| |
| OS << Sym.getName(); |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveCpreturn(unsigned SaveLocation, |
| bool SaveLocationIsRegister) { |
| OS << "\t.cpreturn"; |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveModuleFP() { |
| OS << "\t.module\tfp="; |
| OS << ABIFlagsSection.getFpABIString(ABIFlagsSection.getFpABI()) << "\n"; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetFp( |
| MipsABIFlagsSection::FpABIKind Value) { |
| MipsTargetStreamer::emitDirectiveSetFp(Value); |
| |
| OS << "\t.set\tfp="; |
| OS << ABIFlagsSection.getFpABIString(Value) << "\n"; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveModuleOddSPReg() { |
| MipsTargetStreamer::emitDirectiveModuleOddSPReg(); |
| |
| OS << "\t.module\t" << (ABIFlagsSection.OddSPReg ? "" : "no") << "oddspreg\n"; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetOddSPReg() { |
| MipsTargetStreamer::emitDirectiveSetOddSPReg(); |
| OS << "\t.set\toddspreg\n"; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveSetNoOddSPReg() { |
| MipsTargetStreamer::emitDirectiveSetNoOddSPReg(); |
| OS << "\t.set\tnooddspreg\n"; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveModuleSoftFloat() { |
| OS << "\t.module\tsoftfloat\n"; |
| } |
| |
| void MipsTargetAsmStreamer::emitDirectiveModuleHardFloat() { |
| OS << "\t.module\thardfloat\n"; |
| } |
| |
| // This part is for ELF object output. |
| MipsTargetELFStreamer::MipsTargetELFStreamer(MCStreamer &S, |
| const MCSubtargetInfo &STI) |
| : MipsTargetStreamer(S), MicroMipsEnabled(false), STI(STI) { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| Pic = MCA.getContext().getObjectFileInfo()->getRelocM() == Reloc::PIC_; |
| |
| const FeatureBitset &Features = STI.getFeatureBits(); |
| |
| // Set the header flags that we can in the constructor. |
| // FIXME: This is a fairly terrible hack. We set the rest |
| // of these in the destructor. The problem here is two-fold: |
| // |
| // a: Some of the eflags can be set/reset by directives. |
| // b: There aren't any usage paths that initialize the ABI |
| // pointer until after we initialize either an assembler |
| // or the target machine. |
| // We can fix this by making the target streamer construct |
| // the ABI, but this is fraught with wide ranging dependency |
| // issues as well. |
| unsigned EFlags = MCA.getELFHeaderEFlags(); |
| |
| // Architecture |
| if (Features[Mips::FeatureMips64r6]) |
| EFlags |= ELF::EF_MIPS_ARCH_64R6; |
| else if (Features[Mips::FeatureMips64r2] || |
| Features[Mips::FeatureMips64r3] || |
| Features[Mips::FeatureMips64r5]) |
| EFlags |= ELF::EF_MIPS_ARCH_64R2; |
| else if (Features[Mips::FeatureMips64]) |
| EFlags |= ELF::EF_MIPS_ARCH_64; |
| else if (Features[Mips::FeatureMips5]) |
| EFlags |= ELF::EF_MIPS_ARCH_5; |
| else if (Features[Mips::FeatureMips4]) |
| EFlags |= ELF::EF_MIPS_ARCH_4; |
| else if (Features[Mips::FeatureMips3]) |
| EFlags |= ELF::EF_MIPS_ARCH_3; |
| else if (Features[Mips::FeatureMips32r6]) |
| EFlags |= ELF::EF_MIPS_ARCH_32R6; |
| else if (Features[Mips::FeatureMips32r2] || |
| Features[Mips::FeatureMips32r3] || |
| Features[Mips::FeatureMips32r5]) |
| EFlags |= ELF::EF_MIPS_ARCH_32R2; |
| else if (Features[Mips::FeatureMips32]) |
| EFlags |= ELF::EF_MIPS_ARCH_32; |
| else if (Features[Mips::FeatureMips2]) |
| EFlags |= ELF::EF_MIPS_ARCH_2; |
| else |
| EFlags |= ELF::EF_MIPS_ARCH_1; |
| |
| // Other options. |
| if (Features[Mips::FeatureNaN2008]) |
| EFlags |= ELF::EF_MIPS_NAN2008; |
| |
| // -mabicalls and -mplt are not implemented but we should act as if they were |
| // given. |
| EFlags |= ELF::EF_MIPS_CPIC; |
| |
| MCA.setELFHeaderEFlags(EFlags); |
| } |
| |
| void MipsTargetELFStreamer::emitLabel(MCSymbol *S) { |
| auto *Symbol = cast<MCSymbolELF>(S); |
| if (!isMicroMipsEnabled()) |
| return; |
| getStreamer().getAssembler().registerSymbol(*Symbol); |
| uint8_t Type = Symbol->getType(); |
| if (Type != ELF::STT_FUNC) |
| return; |
| |
| Symbol->setOther(ELF::STO_MIPS_MICROMIPS); |
| } |
| |
| void MipsTargetELFStreamer::finish() { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| const MCObjectFileInfo &OFI = *MCA.getContext().getObjectFileInfo(); |
| |
| // .bss, .text and .data are always at least 16-byte aligned. |
| MCSection &TextSection = *OFI.getTextSection(); |
| MCA.registerSection(TextSection); |
| MCSection &DataSection = *OFI.getDataSection(); |
| MCA.registerSection(DataSection); |
| MCSection &BSSSection = *OFI.getBSSSection(); |
| MCA.registerSection(BSSSection); |
| |
| TextSection.setAlignment(std::max(16u, TextSection.getAlignment())); |
| DataSection.setAlignment(std::max(16u, DataSection.getAlignment())); |
| BSSSection.setAlignment(std::max(16u, BSSSection.getAlignment())); |
| |
| const FeatureBitset &Features = STI.getFeatureBits(); |
| |
| // Update e_header flags. See the FIXME and comment above in |
| // the constructor for a full rundown on this. |
| unsigned EFlags = MCA.getELFHeaderEFlags(); |
| |
| // ABI |
| // N64 does not require any ABI bits. |
| if (getABI().IsO32()) |
| EFlags |= ELF::EF_MIPS_ABI_O32; |
| else if (getABI().IsN32()) |
| EFlags |= ELF::EF_MIPS_ABI2; |
| |
| if (Features[Mips::FeatureGP64Bit]) { |
| if (getABI().IsO32()) |
| EFlags |= ELF::EF_MIPS_32BITMODE; /* Compatibility Mode */ |
| } else if (Features[Mips::FeatureMips64r2] || Features[Mips::FeatureMips64]) |
| EFlags |= ELF::EF_MIPS_32BITMODE; |
| |
| // If we've set the cpic eflag and we're n64, go ahead and set the pic |
| // one as well. |
| if (EFlags & ELF::EF_MIPS_CPIC && getABI().IsN64()) |
| EFlags |= ELF::EF_MIPS_PIC; |
| |
| MCA.setELFHeaderEFlags(EFlags); |
| |
| // Emit all the option records. |
| // At the moment we are only emitting .Mips.options (ODK_REGINFO) and |
| // .reginfo. |
| MipsELFStreamer &MEF = static_cast<MipsELFStreamer &>(Streamer); |
| MEF.EmitMipsOptionRecords(); |
| |
| emitMipsAbiFlags(); |
| } |
| |
| void MipsTargetELFStreamer::emitAssignment(MCSymbol *S, const MCExpr *Value) { |
| auto *Symbol = cast<MCSymbolELF>(S); |
| // If on rhs is micromips symbol then mark Symbol as microMips. |
| if (Value->getKind() != MCExpr::SymbolRef) |
| return; |
| const auto &RhsSym = cast<MCSymbolELF>( |
| static_cast<const MCSymbolRefExpr *>(Value)->getSymbol()); |
| |
| if (!(RhsSym.getOther() & ELF::STO_MIPS_MICROMIPS)) |
| return; |
| |
| Symbol->setOther(ELF::STO_MIPS_MICROMIPS); |
| } |
| |
| MCELFStreamer &MipsTargetELFStreamer::getStreamer() { |
| return static_cast<MCELFStreamer &>(Streamer); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveSetMicroMips() { |
| MicroMipsEnabled = true; |
| |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| unsigned Flags = MCA.getELFHeaderEFlags(); |
| Flags |= ELF::EF_MIPS_MICROMIPS; |
| MCA.setELFHeaderEFlags(Flags); |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveSetNoMicroMips() { |
| MicroMipsEnabled = false; |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveSetMips16() { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| unsigned Flags = MCA.getELFHeaderEFlags(); |
| Flags |= ELF::EF_MIPS_ARCH_ASE_M16; |
| MCA.setELFHeaderEFlags(Flags); |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveSetNoReorder() { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| unsigned Flags = MCA.getELFHeaderEFlags(); |
| Flags |= ELF::EF_MIPS_NOREORDER; |
| MCA.setELFHeaderEFlags(Flags); |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveEnd(StringRef Name) { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| MCContext &Context = MCA.getContext(); |
| MCStreamer &OS = getStreamer(); |
| |
| MCSectionELF *Sec = Context.getELFSection(".pdr", ELF::SHT_PROGBITS, |
| ELF::SHF_ALLOC | ELF::SHT_REL); |
| |
| MCSymbol *Sym = Context.getOrCreateSymbol(Name); |
| const MCSymbolRefExpr *ExprRef = |
| MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, Context); |
| |
| MCA.registerSection(*Sec); |
| Sec->setAlignment(4); |
| |
| OS.PushSection(); |
| |
| OS.SwitchSection(Sec); |
| |
| OS.EmitValueImpl(ExprRef, 4); |
| |
| OS.EmitIntValue(GPRInfoSet ? GPRBitMask : 0, 4); // reg_mask |
| OS.EmitIntValue(GPRInfoSet ? GPROffset : 0, 4); // reg_offset |
| |
| OS.EmitIntValue(FPRInfoSet ? FPRBitMask : 0, 4); // fpreg_mask |
| OS.EmitIntValue(FPRInfoSet ? FPROffset : 0, 4); // fpreg_offset |
| |
| OS.EmitIntValue(FrameInfoSet ? FrameOffset : 0, 4); // frame_offset |
| OS.EmitIntValue(FrameInfoSet ? FrameReg : 0, 4); // frame_reg |
| OS.EmitIntValue(FrameInfoSet ? ReturnReg : 0, 4); // return_reg |
| |
| // The .end directive marks the end of a procedure. Invalidate |
| // the information gathered up until this point. |
| GPRInfoSet = FPRInfoSet = FrameInfoSet = false; |
| |
| OS.PopSection(); |
| |
| // .end also implicitly sets the size. |
| MCSymbol *CurPCSym = Context.createTempSymbol(); |
| OS.EmitLabel(CurPCSym); |
| const MCExpr *Size = MCBinaryExpr::createSub( |
| MCSymbolRefExpr::create(CurPCSym, MCSymbolRefExpr::VK_None, Context), |
| ExprRef, Context); |
| int64_t AbsSize; |
| if (!Size->evaluateAsAbsolute(AbsSize, MCA)) |
| llvm_unreachable("Function size must be evaluatable as absolute"); |
| Size = MCConstantExpr::create(AbsSize, Context); |
| static_cast<MCSymbolELF *>(Sym)->setSize(Size); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveEnt(const MCSymbol &Symbol) { |
| GPRInfoSet = FPRInfoSet = FrameInfoSet = false; |
| |
| // .ent also acts like an implicit '.type symbol, STT_FUNC' |
| static_cast<const MCSymbolELF &>(Symbol).setType(ELF::STT_FUNC); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveAbiCalls() { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| unsigned Flags = MCA.getELFHeaderEFlags(); |
| Flags |= ELF::EF_MIPS_CPIC | ELF::EF_MIPS_PIC; |
| MCA.setELFHeaderEFlags(Flags); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveNaN2008() { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| unsigned Flags = MCA.getELFHeaderEFlags(); |
| Flags |= ELF::EF_MIPS_NAN2008; |
| MCA.setELFHeaderEFlags(Flags); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveNaNLegacy() { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| unsigned Flags = MCA.getELFHeaderEFlags(); |
| Flags &= ~ELF::EF_MIPS_NAN2008; |
| MCA.setELFHeaderEFlags(Flags); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveOptionPic0() { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| unsigned Flags = MCA.getELFHeaderEFlags(); |
| // This option overrides other PIC options like -KPIC. |
| Pic = false; |
| Flags &= ~ELF::EF_MIPS_PIC; |
| MCA.setELFHeaderEFlags(Flags); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveOptionPic2() { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| unsigned Flags = MCA.getELFHeaderEFlags(); |
| Pic = true; |
| // NOTE: We are following the GAS behaviour here which means the directive |
| // 'pic2' also sets the CPIC bit in the ELF header. This is different from |
| // what is stated in the SYSV ABI which consider the bits EF_MIPS_PIC and |
| // EF_MIPS_CPIC to be mutually exclusive. |
| Flags |= ELF::EF_MIPS_PIC | ELF::EF_MIPS_CPIC; |
| MCA.setELFHeaderEFlags(Flags); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveInsn() { |
| MipsTargetStreamer::emitDirectiveInsn(); |
| MipsELFStreamer &MEF = static_cast<MipsELFStreamer &>(Streamer); |
| MEF.createPendingLabelRelocs(); |
| } |
| |
| void MipsTargetELFStreamer::emitFrame(unsigned StackReg, unsigned StackSize, |
| unsigned ReturnReg_) { |
| MCContext &Context = getStreamer().getAssembler().getContext(); |
| const MCRegisterInfo *RegInfo = Context.getRegisterInfo(); |
| |
| FrameInfoSet = true; |
| FrameReg = RegInfo->getEncodingValue(StackReg); |
| FrameOffset = StackSize; |
| ReturnReg = RegInfo->getEncodingValue(ReturnReg_); |
| } |
| |
| void MipsTargetELFStreamer::emitMask(unsigned CPUBitmask, |
| int CPUTopSavedRegOff) { |
| GPRInfoSet = true; |
| GPRBitMask = CPUBitmask; |
| GPROffset = CPUTopSavedRegOff; |
| } |
| |
| void MipsTargetELFStreamer::emitFMask(unsigned FPUBitmask, |
| int FPUTopSavedRegOff) { |
| FPRInfoSet = true; |
| FPRBitMask = FPUBitmask; |
| FPROffset = FPUTopSavedRegOff; |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveCpLoad(unsigned RegNo) { |
| // .cpload $reg |
| // This directive expands to: |
| // lui $gp, %hi(_gp_disp) |
| // addui $gp, $gp, %lo(_gp_disp) |
| // addu $gp, $gp, $reg |
| // when support for position independent code is enabled. |
| if (!Pic || (getABI().IsN32() || getABI().IsN64())) |
| return; |
| |
| // There's a GNU extension controlled by -mno-shared that allows |
| // locally-binding symbols to be accessed using absolute addresses. |
| // This is currently not supported. When supported -mno-shared makes |
| // .cpload expand to: |
| // lui $gp, %hi(__gnu_local_gp) |
| // addiu $gp, $gp, %lo(__gnu_local_gp) |
| |
| StringRef SymName("_gp_disp"); |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| MCSymbol *GP_Disp = MCA.getContext().getOrCreateSymbol(SymName); |
| MCA.registerSymbol(*GP_Disp); |
| |
| MCInst TmpInst; |
| TmpInst.setOpcode(Mips::LUi); |
| TmpInst.addOperand(MCOperand::createReg(Mips::GP)); |
| const MCSymbolRefExpr *HiSym = MCSymbolRefExpr::create( |
| "_gp_disp", MCSymbolRefExpr::VK_Mips_ABS_HI, MCA.getContext()); |
| TmpInst.addOperand(MCOperand::createExpr(HiSym)); |
| getStreamer().EmitInstruction(TmpInst, STI); |
| |
| TmpInst.clear(); |
| |
| TmpInst.setOpcode(Mips::ADDiu); |
| TmpInst.addOperand(MCOperand::createReg(Mips::GP)); |
| TmpInst.addOperand(MCOperand::createReg(Mips::GP)); |
| const MCSymbolRefExpr *LoSym = MCSymbolRefExpr::create( |
| "_gp_disp", MCSymbolRefExpr::VK_Mips_ABS_LO, MCA.getContext()); |
| TmpInst.addOperand(MCOperand::createExpr(LoSym)); |
| getStreamer().EmitInstruction(TmpInst, STI); |
| |
| TmpInst.clear(); |
| |
| TmpInst.setOpcode(Mips::ADDu); |
| TmpInst.addOperand(MCOperand::createReg(Mips::GP)); |
| TmpInst.addOperand(MCOperand::createReg(Mips::GP)); |
| TmpInst.addOperand(MCOperand::createReg(RegNo)); |
| getStreamer().EmitInstruction(TmpInst, STI); |
| |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveCpRestore( |
| SmallVector<MCInst, 3> &StoreInsts, int Offset) { |
| MipsTargetStreamer::emitDirectiveCpRestore(StoreInsts, Offset); |
| // .cprestore offset |
| // When PIC mode is enabled and the O32 ABI is used, this directive expands |
| // to: |
| // sw $gp, offset($sp) |
| // and adds a corresponding LW after every JAL. |
| |
| // Note that .cprestore is ignored if used with the N32 and N64 ABIs or if it |
| // is used in non-PIC mode. |
| if (!Pic || (getABI().IsN32() || getABI().IsN64())) |
| return; |
| |
| for (const MCInst &Inst : StoreInsts) |
| getStreamer().EmitInstruction(Inst, STI); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveCpsetup(unsigned RegNo, |
| int RegOrOffset, |
| const MCSymbol &Sym, |
| bool IsReg) { |
| // Only N32 and N64 emit anything for .cpsetup iff PIC is set. |
| if (!Pic || !(getABI().IsN32() || getABI().IsN64())) |
| return; |
| |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| MCInst Inst; |
| |
| // Either store the old $gp in a register or on the stack |
| if (IsReg) { |
| // move $save, $gpreg |
| Inst.setOpcode(Mips::OR64); |
| Inst.addOperand(MCOperand::createReg(RegOrOffset)); |
| Inst.addOperand(MCOperand::createReg(Mips::GP)); |
| Inst.addOperand(MCOperand::createReg(Mips::ZERO)); |
| } else { |
| // sd $gpreg, offset($sp) |
| Inst.setOpcode(Mips::SD); |
| Inst.addOperand(MCOperand::createReg(Mips::GP)); |
| Inst.addOperand(MCOperand::createReg(Mips::SP)); |
| Inst.addOperand(MCOperand::createImm(RegOrOffset)); |
| } |
| getStreamer().EmitInstruction(Inst, STI); |
| Inst.clear(); |
| |
| const MCSymbolRefExpr *HiExpr = MCSymbolRefExpr::create( |
| &Sym, MCSymbolRefExpr::VK_Mips_GPOFF_HI, MCA.getContext()); |
| const MCSymbolRefExpr *LoExpr = MCSymbolRefExpr::create( |
| &Sym, MCSymbolRefExpr::VK_Mips_GPOFF_LO, MCA.getContext()); |
| |
| // lui $gp, %hi(%neg(%gp_rel(funcSym))) |
| Inst.setOpcode(Mips::LUi); |
| Inst.addOperand(MCOperand::createReg(Mips::GP)); |
| Inst.addOperand(MCOperand::createExpr(HiExpr)); |
| getStreamer().EmitInstruction(Inst, STI); |
| Inst.clear(); |
| |
| // addiu $gp, $gp, %lo(%neg(%gp_rel(funcSym))) |
| Inst.setOpcode(Mips::ADDiu); |
| Inst.addOperand(MCOperand::createReg(Mips::GP)); |
| Inst.addOperand(MCOperand::createReg(Mips::GP)); |
| Inst.addOperand(MCOperand::createExpr(LoExpr)); |
| getStreamer().EmitInstruction(Inst, STI); |
| Inst.clear(); |
| |
| // daddu $gp, $gp, $funcreg |
| Inst.setOpcode(Mips::DADDu); |
| Inst.addOperand(MCOperand::createReg(Mips::GP)); |
| Inst.addOperand(MCOperand::createReg(Mips::GP)); |
| Inst.addOperand(MCOperand::createReg(RegNo)); |
| getStreamer().EmitInstruction(Inst, STI); |
| |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetELFStreamer::emitDirectiveCpreturn(unsigned SaveLocation, |
| bool SaveLocationIsRegister) { |
| // Only N32 and N64 emit anything for .cpreturn iff PIC is set. |
| if (!Pic || !(getABI().IsN32() || getABI().IsN64())) |
| return; |
| |
| MCInst Inst; |
| // Either restore the old $gp from a register or on the stack |
| if (SaveLocationIsRegister) { |
| Inst.setOpcode(Mips::OR); |
| Inst.addOperand(MCOperand::createReg(Mips::GP)); |
| Inst.addOperand(MCOperand::createReg(SaveLocation)); |
| Inst.addOperand(MCOperand::createReg(Mips::ZERO)); |
| } else { |
| Inst.setOpcode(Mips::LD); |
| Inst.addOperand(MCOperand::createReg(Mips::GP)); |
| Inst.addOperand(MCOperand::createReg(Mips::SP)); |
| Inst.addOperand(MCOperand::createImm(SaveLocation)); |
| } |
| getStreamer().EmitInstruction(Inst, STI); |
| |
| forbidModuleDirective(); |
| } |
| |
| void MipsTargetELFStreamer::emitMipsAbiFlags() { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| MCContext &Context = MCA.getContext(); |
| MCStreamer &OS = getStreamer(); |
| MCSectionELF *Sec = Context.getELFSection( |
| ".MIPS.abiflags", ELF::SHT_MIPS_ABIFLAGS, ELF::SHF_ALLOC, 24, ""); |
| MCA.registerSection(*Sec); |
| Sec->setAlignment(8); |
| OS.SwitchSection(Sec); |
| |
| OS << ABIFlagsSection; |
| } |