1 //===-- MipsTargetStreamer.cpp - Mips Target Streamer Methods -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file provides Mips specific target streamer methods.
12 //===----------------------------------------------------------------------===//
14 #include "InstPrinter/MipsInstPrinter.h"
15 #include "MipsELFStreamer.h"
16 #include "MipsMCTargetDesc.h"
17 #include "MipsTargetObjectFile.h"
18 #include "MipsTargetStreamer.h"
19 #include "llvm/MC/MCContext.h"
20 #include "llvm/MC/MCELF.h"
21 #include "llvm/MC/MCSectionELF.h"
22 #include "llvm/MC/MCSubtargetInfo.h"
23 #include "llvm/MC/MCSymbol.h"
24 #include "llvm/Support/CommandLine.h"
25 #include "llvm/Support/ELF.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/Support/FormattedStream.h"
31 MipsTargetStreamer::MipsTargetStreamer(MCStreamer &S)
32 : MCTargetStreamer(S), ModuleDirectiveAllowed(true) {
33 GPRInfoSet = FPRInfoSet = FrameInfoSet = false;
35 void MipsTargetStreamer::emitDirectiveSetMicroMips() {}
36 void MipsTargetStreamer::emitDirectiveSetNoMicroMips() {}
37 void MipsTargetStreamer::emitDirectiveSetMips16() {}
38 void MipsTargetStreamer::emitDirectiveSetNoMips16() { forbidModuleDirective(); }
39 void MipsTargetStreamer::emitDirectiveSetReorder() { forbidModuleDirective(); }
40 void MipsTargetStreamer::emitDirectiveSetNoReorder() {}
41 void MipsTargetStreamer::emitDirectiveSetMacro() { forbidModuleDirective(); }
42 void MipsTargetStreamer::emitDirectiveSetNoMacro() { forbidModuleDirective(); }
43 void MipsTargetStreamer::emitDirectiveSetMsa() { forbidModuleDirective(); }
44 void MipsTargetStreamer::emitDirectiveSetNoMsa() { forbidModuleDirective(); }
45 void MipsTargetStreamer::emitDirectiveSetAt() { forbidModuleDirective(); }
46 void MipsTargetStreamer::emitDirectiveSetNoAt() { forbidModuleDirective(); }
47 void MipsTargetStreamer::emitDirectiveEnd(StringRef Name) {}
48 void MipsTargetStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {}
49 void MipsTargetStreamer::emitDirectiveAbiCalls() {}
50 void MipsTargetStreamer::emitDirectiveNaN2008() {}
51 void MipsTargetStreamer::emitDirectiveNaNLegacy() {}
52 void MipsTargetStreamer::emitDirectiveOptionPic0() {}
53 void MipsTargetStreamer::emitDirectiveOptionPic2() {}
54 void MipsTargetStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
55 unsigned ReturnReg) {}
56 void MipsTargetStreamer::emitMask(unsigned CPUBitmask, int CPUTopSavedRegOff) {}
57 void MipsTargetStreamer::emitFMask(unsigned FPUBitmask, int FPUTopSavedRegOff) {
59 void MipsTargetStreamer::emitDirectiveSetArch(StringRef Arch) {
60 forbidModuleDirective();
62 void MipsTargetStreamer::emitDirectiveSetMips0() {}
63 void MipsTargetStreamer::emitDirectiveSetMips1() { forbidModuleDirective(); }
64 void MipsTargetStreamer::emitDirectiveSetMips2() { forbidModuleDirective(); }
65 void MipsTargetStreamer::emitDirectiveSetMips3() { forbidModuleDirective(); }
66 void MipsTargetStreamer::emitDirectiveSetMips4() { forbidModuleDirective(); }
67 void MipsTargetStreamer::emitDirectiveSetMips5() { forbidModuleDirective(); }
68 void MipsTargetStreamer::emitDirectiveSetMips32() { forbidModuleDirective(); }
69 void MipsTargetStreamer::emitDirectiveSetMips32R2() { forbidModuleDirective(); }
70 void MipsTargetStreamer::emitDirectiveSetMips32R6() { forbidModuleDirective(); }
71 void MipsTargetStreamer::emitDirectiveSetMips64() { forbidModuleDirective(); }
72 void MipsTargetStreamer::emitDirectiveSetMips64R2() { forbidModuleDirective(); }
73 void MipsTargetStreamer::emitDirectiveSetMips64R6() { forbidModuleDirective(); }
74 void MipsTargetStreamer::emitDirectiveSetPop() {}
75 void MipsTargetStreamer::emitDirectiveSetPush() {}
76 void MipsTargetStreamer::emitDirectiveSetDsp() { forbidModuleDirective(); }
77 void MipsTargetStreamer::emitDirectiveSetNoDsp() { forbidModuleDirective(); }
78 void MipsTargetStreamer::emitDirectiveCpLoad(unsigned RegNo) {}
79 void MipsTargetStreamer::emitDirectiveCpsetup(unsigned RegNo, int RegOrOffset,
80 const MCSymbol &Sym, bool IsReg) {
82 void MipsTargetStreamer::emitDirectiveModuleOddSPReg(bool Enabled,
84 if (!Enabled && !IsO32ABI)
85 report_fatal_error("+nooddspreg is only valid for O32");
88 MipsTargetAsmStreamer::MipsTargetAsmStreamer(MCStreamer &S,
89 formatted_raw_ostream &OS)
90 : MipsTargetStreamer(S), OS(OS) {}
92 void MipsTargetAsmStreamer::emitDirectiveSetMicroMips() {
93 OS << "\t.set\tmicromips\n";
94 forbidModuleDirective();
97 void MipsTargetAsmStreamer::emitDirectiveSetNoMicroMips() {
98 OS << "\t.set\tnomicromips\n";
99 forbidModuleDirective();
102 void MipsTargetAsmStreamer::emitDirectiveSetMips16() {
103 OS << "\t.set\tmips16\n";
104 forbidModuleDirective();
107 void MipsTargetAsmStreamer::emitDirectiveSetNoMips16() {
108 OS << "\t.set\tnomips16\n";
109 MipsTargetStreamer::emitDirectiveSetNoMips16();
112 void MipsTargetAsmStreamer::emitDirectiveSetReorder() {
113 OS << "\t.set\treorder\n";
114 MipsTargetStreamer::emitDirectiveSetReorder();
117 void MipsTargetAsmStreamer::emitDirectiveSetNoReorder() {
118 OS << "\t.set\tnoreorder\n";
119 forbidModuleDirective();
122 void MipsTargetAsmStreamer::emitDirectiveSetMacro() {
123 OS << "\t.set\tmacro\n";
124 MipsTargetStreamer::emitDirectiveSetMacro();
127 void MipsTargetAsmStreamer::emitDirectiveSetNoMacro() {
128 OS << "\t.set\tnomacro\n";
129 MipsTargetStreamer::emitDirectiveSetNoMacro();
132 void MipsTargetAsmStreamer::emitDirectiveSetMsa() {
133 OS << "\t.set\tmsa\n";
134 MipsTargetStreamer::emitDirectiveSetMsa();
137 void MipsTargetAsmStreamer::emitDirectiveSetNoMsa() {
138 OS << "\t.set\tnomsa\n";
139 MipsTargetStreamer::emitDirectiveSetNoMsa();
142 void MipsTargetAsmStreamer::emitDirectiveSetAt() {
143 OS << "\t.set\tat\n";
144 MipsTargetStreamer::emitDirectiveSetAt();
147 void MipsTargetAsmStreamer::emitDirectiveSetNoAt() {
148 OS << "\t.set\tnoat\n";
149 MipsTargetStreamer::emitDirectiveSetNoAt();
152 void MipsTargetAsmStreamer::emitDirectiveEnd(StringRef Name) {
153 OS << "\t.end\t" << Name << '\n';
156 void MipsTargetAsmStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {
157 OS << "\t.ent\t" << Symbol.getName() << '\n';
160 void MipsTargetAsmStreamer::emitDirectiveAbiCalls() { OS << "\t.abicalls\n"; }
162 void MipsTargetAsmStreamer::emitDirectiveNaN2008() { OS << "\t.nan\t2008\n"; }
164 void MipsTargetAsmStreamer::emitDirectiveNaNLegacy() {
165 OS << "\t.nan\tlegacy\n";
168 void MipsTargetAsmStreamer::emitDirectiveOptionPic0() {
169 OS << "\t.option\tpic0\n";
172 void MipsTargetAsmStreamer::emitDirectiveOptionPic2() {
173 OS << "\t.option\tpic2\n";
176 void MipsTargetAsmStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
177 unsigned ReturnReg) {
179 << StringRef(MipsInstPrinter::getRegisterName(StackReg)).lower() << ","
181 << StringRef(MipsInstPrinter::getRegisterName(ReturnReg)).lower() << '\n';
184 void MipsTargetAsmStreamer::emitDirectiveSetArch(StringRef Arch) {
185 OS << "\t.set arch=" << Arch << "\n";
186 MipsTargetStreamer::emitDirectiveSetArch(Arch);
189 void MipsTargetAsmStreamer::emitDirectiveSetMips0() { OS << "\t.set\tmips0\n"; }
191 void MipsTargetAsmStreamer::emitDirectiveSetMips1() {
192 OS << "\t.set\tmips1\n";
193 MipsTargetStreamer::emitDirectiveSetMips1();
196 void MipsTargetAsmStreamer::emitDirectiveSetMips2() {
197 OS << "\t.set\tmips2\n";
198 MipsTargetStreamer::emitDirectiveSetMips2();
201 void MipsTargetAsmStreamer::emitDirectiveSetMips3() {
202 OS << "\t.set\tmips3\n";
203 MipsTargetStreamer::emitDirectiveSetMips3();
206 void MipsTargetAsmStreamer::emitDirectiveSetMips4() {
207 OS << "\t.set\tmips4\n";
208 MipsTargetStreamer::emitDirectiveSetMips4();
211 void MipsTargetAsmStreamer::emitDirectiveSetMips5() {
212 OS << "\t.set\tmips5\n";
213 MipsTargetStreamer::emitDirectiveSetMips5();
216 void MipsTargetAsmStreamer::emitDirectiveSetMips32() {
217 OS << "\t.set\tmips32\n";
218 MipsTargetStreamer::emitDirectiveSetMips32();
221 void MipsTargetAsmStreamer::emitDirectiveSetMips32R2() {
222 OS << "\t.set\tmips32r2\n";
223 MipsTargetStreamer::emitDirectiveSetMips32R2();
226 void MipsTargetAsmStreamer::emitDirectiveSetMips32R6() {
227 OS << "\t.set\tmips32r6\n";
228 MipsTargetStreamer::emitDirectiveSetMips32R6();
231 void MipsTargetAsmStreamer::emitDirectiveSetMips64() {
232 OS << "\t.set\tmips64\n";
233 MipsTargetStreamer::emitDirectiveSetMips64();
236 void MipsTargetAsmStreamer::emitDirectiveSetMips64R2() {
237 OS << "\t.set\tmips64r2\n";
238 MipsTargetStreamer::emitDirectiveSetMips64R2();
241 void MipsTargetAsmStreamer::emitDirectiveSetMips64R6() {
242 OS << "\t.set\tmips64r6\n";
243 MipsTargetStreamer::emitDirectiveSetMips64R6();
246 void MipsTargetAsmStreamer::emitDirectiveSetDsp() {
247 OS << "\t.set\tdsp\n";
248 MipsTargetStreamer::emitDirectiveSetDsp();
251 void MipsTargetAsmStreamer::emitDirectiveSetNoDsp() {
252 OS << "\t.set\tnodsp\n";
253 MipsTargetStreamer::emitDirectiveSetNoDsp();
256 void MipsTargetAsmStreamer::emitDirectiveSetPop() { OS << "\t.set\tpop\n"; }
258 void MipsTargetAsmStreamer::emitDirectiveSetPush() { OS << "\t.set\tpush\n"; }
260 // Print a 32 bit hex number with all numbers.
261 static void printHex32(unsigned Value, raw_ostream &OS) {
263 for (int i = 7; i >= 0; i--)
264 OS.write_hex((Value & (0xF << (i * 4))) >> (i * 4));
267 void MipsTargetAsmStreamer::emitMask(unsigned CPUBitmask,
268 int CPUTopSavedRegOff) {
270 printHex32(CPUBitmask, OS);
271 OS << ',' << CPUTopSavedRegOff << '\n';
274 void MipsTargetAsmStreamer::emitFMask(unsigned FPUBitmask,
275 int FPUTopSavedRegOff) {
277 printHex32(FPUBitmask, OS);
278 OS << "," << FPUTopSavedRegOff << '\n';
281 void MipsTargetAsmStreamer::emitDirectiveCpLoad(unsigned RegNo) {
283 << StringRef(MipsInstPrinter::getRegisterName(RegNo)).lower() << "\n";
284 forbidModuleDirective();
287 void MipsTargetAsmStreamer::emitDirectiveCpsetup(unsigned RegNo,
291 OS << "\t.cpsetup\t$"
292 << StringRef(MipsInstPrinter::getRegisterName(RegNo)).lower() << ", ";
296 << StringRef(MipsInstPrinter::getRegisterName(RegOrOffset)).lower();
302 OS << Sym.getName() << "\n";
303 forbidModuleDirective();
306 void MipsTargetAsmStreamer::emitDirectiveModuleFP(
307 MipsABIFlagsSection::FpABIKind Value, bool Is32BitABI) {
308 MipsTargetStreamer::emitDirectiveModuleFP(Value, Is32BitABI);
310 StringRef ModuleValue;
311 OS << "\t.module\tfp=";
312 OS << ABIFlagsSection.getFpABIString(Value) << "\n";
315 void MipsTargetAsmStreamer::emitDirectiveSetFp(
316 MipsABIFlagsSection::FpABIKind Value) {
317 StringRef ModuleValue;
319 OS << ABIFlagsSection.getFpABIString(Value) << "\n";
322 void MipsTargetAsmStreamer::emitMipsAbiFlags() {
323 // No action required for text output.
326 void MipsTargetAsmStreamer::emitDirectiveModuleOddSPReg(bool Enabled,
328 MipsTargetStreamer::emitDirectiveModuleOddSPReg(Enabled, IsO32ABI);
330 OS << "\t.module\t" << (Enabled ? "" : "no") << "oddspreg\n";
333 // This part is for ELF object output.
334 MipsTargetELFStreamer::MipsTargetELFStreamer(MCStreamer &S,
335 const MCSubtargetInfo &STI)
336 : MipsTargetStreamer(S), MicroMipsEnabled(false), STI(STI) {
337 MCAssembler &MCA = getStreamer().getAssembler();
338 Triple T(STI.getTargetTriple());
339 Pic = (MCA.getContext().getObjectFileInfo()->getRelocM() == Reloc::PIC_)
343 uint64_t Features = STI.getFeatureBits();
345 // Set the header flags that we can in the constructor.
346 // FIXME: This is a fairly terrible hack. We set the rest
347 // of these in the destructor. The problem here is two-fold:
349 // a: Some of the eflags can be set/reset by directives.
350 // b: There aren't any usage paths that initialize the ABI
351 // pointer until after we initialize either an assembler
352 // or the target machine.
353 // We can fix this by making the target streamer construct
354 // the ABI, but this is fraught with wide ranging dependency
356 unsigned EFlags = MCA.getELFHeaderEFlags();
359 if (Features & Mips::FeatureMips64r6)
360 EFlags |= ELF::EF_MIPS_ARCH_64R6;
361 else if (Features & Mips::FeatureMips64r2)
362 EFlags |= ELF::EF_MIPS_ARCH_64R2;
363 else if (Features & Mips::FeatureMips64)
364 EFlags |= ELF::EF_MIPS_ARCH_64;
365 else if (Features & Mips::FeatureMips5)
366 EFlags |= ELF::EF_MIPS_ARCH_5;
367 else if (Features & Mips::FeatureMips4)
368 EFlags |= ELF::EF_MIPS_ARCH_4;
369 else if (Features & Mips::FeatureMips3)
370 EFlags |= ELF::EF_MIPS_ARCH_3;
371 else if (Features & Mips::FeatureMips32r6)
372 EFlags |= ELF::EF_MIPS_ARCH_32R6;
373 else if (Features & Mips::FeatureMips32r2)
374 EFlags |= ELF::EF_MIPS_ARCH_32R2;
375 else if (Features & Mips::FeatureMips32)
376 EFlags |= ELF::EF_MIPS_ARCH_32;
377 else if (Features & Mips::FeatureMips2)
378 EFlags |= ELF::EF_MIPS_ARCH_2;
380 EFlags |= ELF::EF_MIPS_ARCH_1;
383 if (Features & Mips::FeatureNaN2008)
384 EFlags |= ELF::EF_MIPS_NAN2008;
386 // -mabicalls and -mplt are not implemented but we should act as if they were
388 EFlags |= ELF::EF_MIPS_CPIC;
390 MCA.setELFHeaderEFlags(EFlags);
393 void MipsTargetELFStreamer::emitLabel(MCSymbol *Symbol) {
394 if (!isMicroMipsEnabled())
396 MCSymbolData &Data = getStreamer().getOrCreateSymbolData(Symbol);
397 uint8_t Type = MCELF::GetType(Data);
398 if (Type != ELF::STT_FUNC)
401 // The "other" values are stored in the last 6 bits of the second byte
402 // The traditional defines for STO values assume the full byte and thus
403 // the shift to pack it.
404 MCELF::setOther(Data, ELF::STO_MIPS_MICROMIPS >> 2);
407 void MipsTargetELFStreamer::finish() {
408 MCAssembler &MCA = getStreamer().getAssembler();
409 const MCObjectFileInfo &OFI = *MCA.getContext().getObjectFileInfo();
411 // .bss, .text and .data are always at least 16-byte aligned.
412 MCSectionData &TextSectionData =
413 MCA.getOrCreateSectionData(*OFI.getTextSection());
414 MCSectionData &DataSectionData =
415 MCA.getOrCreateSectionData(*OFI.getDataSection());
416 MCSectionData &BSSSectionData =
417 MCA.getOrCreateSectionData(*OFI.getBSSSection());
419 TextSectionData.setAlignment(std::max(16u, TextSectionData.getAlignment()));
420 DataSectionData.setAlignment(std::max(16u, DataSectionData.getAlignment()));
421 BSSSectionData.setAlignment(std::max(16u, BSSSectionData.getAlignment()));
423 uint64_t Features = STI.getFeatureBits();
425 // Update e_header flags. See the FIXME and comment above in
426 // the constructor for a full rundown on this.
427 unsigned EFlags = MCA.getELFHeaderEFlags();
430 // N64 does not require any ABI bits.
431 if (getABI().IsO32())
432 EFlags |= ELF::EF_MIPS_ABI_O32;
433 else if (getABI().IsN32())
434 EFlags |= ELF::EF_MIPS_ABI2;
436 if (Features & Mips::FeatureGP64Bit) {
437 if (getABI().IsO32())
438 EFlags |= ELF::EF_MIPS_32BITMODE; /* Compatibility Mode */
439 } else if (Features & Mips::FeatureMips64r2 || Features & Mips::FeatureMips64)
440 EFlags |= ELF::EF_MIPS_32BITMODE;
442 // If we've set the cpic eflag and we're n64, go ahead and set the pic
444 if (EFlags & ELF::EF_MIPS_CPIC && getABI().IsN64())
445 EFlags |= ELF::EF_MIPS_PIC;
447 MCA.setELFHeaderEFlags(EFlags);
449 // Emit all the option records.
450 // At the moment we are only emitting .Mips.options (ODK_REGINFO) and
452 MipsELFStreamer &MEF = static_cast<MipsELFStreamer &>(Streamer);
453 MEF.EmitMipsOptionRecords();
458 void MipsTargetELFStreamer::emitAssignment(MCSymbol *Symbol,
459 const MCExpr *Value) {
460 // If on rhs is micromips symbol then mark Symbol as microMips.
461 if (Value->getKind() != MCExpr::SymbolRef)
463 const MCSymbol &RhsSym =
464 static_cast<const MCSymbolRefExpr *>(Value)->getSymbol();
465 MCSymbolData &Data = getStreamer().getOrCreateSymbolData(&RhsSym);
466 uint8_t Type = MCELF::GetType(Data);
467 if ((Type != ELF::STT_FUNC) ||
468 !(MCELF::getOther(Data) & (ELF::STO_MIPS_MICROMIPS >> 2)))
471 MCSymbolData &SymbolData = getStreamer().getOrCreateSymbolData(Symbol);
472 // The "other" values are stored in the last 6 bits of the second byte.
473 // The traditional defines for STO values assume the full byte and thus
474 // the shift to pack it.
475 MCELF::setOther(SymbolData, ELF::STO_MIPS_MICROMIPS >> 2);
478 MCELFStreamer &MipsTargetELFStreamer::getStreamer() {
479 return static_cast<MCELFStreamer &>(Streamer);
482 void MipsTargetELFStreamer::emitDirectiveSetMicroMips() {
483 MicroMipsEnabled = true;
485 MCAssembler &MCA = getStreamer().getAssembler();
486 unsigned Flags = MCA.getELFHeaderEFlags();
487 Flags |= ELF::EF_MIPS_MICROMIPS;
488 MCA.setELFHeaderEFlags(Flags);
489 forbidModuleDirective();
492 void MipsTargetELFStreamer::emitDirectiveSetNoMicroMips() {
493 MicroMipsEnabled = false;
494 forbidModuleDirective();
497 void MipsTargetELFStreamer::emitDirectiveSetMips16() {
498 MCAssembler &MCA = getStreamer().getAssembler();
499 unsigned Flags = MCA.getELFHeaderEFlags();
500 Flags |= ELF::EF_MIPS_ARCH_ASE_M16;
501 MCA.setELFHeaderEFlags(Flags);
502 forbidModuleDirective();
505 void MipsTargetELFStreamer::emitDirectiveSetNoReorder() {
506 MCAssembler &MCA = getStreamer().getAssembler();
507 unsigned Flags = MCA.getELFHeaderEFlags();
508 Flags |= ELF::EF_MIPS_NOREORDER;
509 MCA.setELFHeaderEFlags(Flags);
510 forbidModuleDirective();
513 void MipsTargetELFStreamer::emitDirectiveEnd(StringRef Name) {
514 MCAssembler &MCA = getStreamer().getAssembler();
515 MCContext &Context = MCA.getContext();
516 MCStreamer &OS = getStreamer();
518 const MCSectionELF *Sec = Context.getELFSection(
519 ".pdr", ELF::SHT_PROGBITS, ELF::SHF_ALLOC | ELF::SHT_REL);
521 const MCSymbolRefExpr *ExprRef =
522 MCSymbolRefExpr::Create(Name, MCSymbolRefExpr::VK_None, Context);
524 MCSectionData &SecData = MCA.getOrCreateSectionData(*Sec);
525 SecData.setAlignment(4);
529 OS.SwitchSection(Sec);
531 OS.EmitValueImpl(ExprRef, 4);
533 OS.EmitIntValue(GPRInfoSet ? GPRBitMask : 0, 4); // reg_mask
534 OS.EmitIntValue(GPRInfoSet ? GPROffset : 0, 4); // reg_offset
536 OS.EmitIntValue(FPRInfoSet ? FPRBitMask : 0, 4); // fpreg_mask
537 OS.EmitIntValue(FPRInfoSet ? FPROffset : 0, 4); // fpreg_offset
539 OS.EmitIntValue(FrameInfoSet ? FrameOffset : 0, 4); // frame_offset
540 OS.EmitIntValue(FrameInfoSet ? FrameReg : 0, 4); // frame_reg
541 OS.EmitIntValue(FrameInfoSet ? ReturnReg : 0, 4); // return_reg
543 // The .end directive marks the end of a procedure. Invalidate
544 // the information gathered up until this point.
545 GPRInfoSet = FPRInfoSet = FrameInfoSet = false;
550 void MipsTargetELFStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {
551 GPRInfoSet = FPRInfoSet = FrameInfoSet = false;
554 void MipsTargetELFStreamer::emitDirectiveAbiCalls() {
555 MCAssembler &MCA = getStreamer().getAssembler();
556 unsigned Flags = MCA.getELFHeaderEFlags();
557 Flags |= ELF::EF_MIPS_CPIC | ELF::EF_MIPS_PIC;
558 MCA.setELFHeaderEFlags(Flags);
561 void MipsTargetELFStreamer::emitDirectiveNaN2008() {
562 MCAssembler &MCA = getStreamer().getAssembler();
563 unsigned Flags = MCA.getELFHeaderEFlags();
564 Flags |= ELF::EF_MIPS_NAN2008;
565 MCA.setELFHeaderEFlags(Flags);
568 void MipsTargetELFStreamer::emitDirectiveNaNLegacy() {
569 MCAssembler &MCA = getStreamer().getAssembler();
570 unsigned Flags = MCA.getELFHeaderEFlags();
571 Flags &= ~ELF::EF_MIPS_NAN2008;
572 MCA.setELFHeaderEFlags(Flags);
575 void MipsTargetELFStreamer::emitDirectiveOptionPic0() {
576 MCAssembler &MCA = getStreamer().getAssembler();
577 unsigned Flags = MCA.getELFHeaderEFlags();
578 // This option overrides other PIC options like -KPIC.
580 Flags &= ~ELF::EF_MIPS_PIC;
581 MCA.setELFHeaderEFlags(Flags);
584 void MipsTargetELFStreamer::emitDirectiveOptionPic2() {
585 MCAssembler &MCA = getStreamer().getAssembler();
586 unsigned Flags = MCA.getELFHeaderEFlags();
588 // NOTE: We are following the GAS behaviour here which means the directive
589 // 'pic2' also sets the CPIC bit in the ELF header. This is different from
590 // what is stated in the SYSV ABI which consider the bits EF_MIPS_PIC and
591 // EF_MIPS_CPIC to be mutually exclusive.
592 Flags |= ELF::EF_MIPS_PIC | ELF::EF_MIPS_CPIC;
593 MCA.setELFHeaderEFlags(Flags);
596 void MipsTargetELFStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
597 unsigned ReturnReg_) {
598 MCContext &Context = getStreamer().getAssembler().getContext();
599 const MCRegisterInfo *RegInfo = Context.getRegisterInfo();
602 FrameReg = RegInfo->getEncodingValue(StackReg);
603 FrameOffset = StackSize;
604 ReturnReg = RegInfo->getEncodingValue(ReturnReg_);
607 void MipsTargetELFStreamer::emitMask(unsigned CPUBitmask,
608 int CPUTopSavedRegOff) {
610 GPRBitMask = CPUBitmask;
611 GPROffset = CPUTopSavedRegOff;
614 void MipsTargetELFStreamer::emitFMask(unsigned FPUBitmask,
615 int FPUTopSavedRegOff) {
617 FPRBitMask = FPUBitmask;
618 FPROffset = FPUTopSavedRegOff;
621 void MipsTargetELFStreamer::emitDirectiveCpLoad(unsigned RegNo) {
623 // This directive expands to:
624 // lui $gp, %hi(_gp_disp)
625 // addui $gp, $gp, %lo(_gp_disp)
626 // addu $gp, $gp, $reg
627 // when support for position independent code is enabled.
628 if (!Pic || (getABI().IsN32() || getABI().IsN64()))
631 // There's a GNU extension controlled by -mno-shared that allows
632 // locally-binding symbols to be accessed using absolute addresses.
633 // This is currently not supported. When supported -mno-shared makes
634 // .cpload expand to:
635 // lui $gp, %hi(__gnu_local_gp)
636 // addiu $gp, $gp, %lo(__gnu_local_gp)
638 StringRef SymName("_gp_disp");
639 MCAssembler &MCA = getStreamer().getAssembler();
640 MCSymbol *GP_Disp = MCA.getContext().GetOrCreateSymbol(SymName);
641 MCA.getOrCreateSymbolData(*GP_Disp);
644 TmpInst.setOpcode(Mips::LUi);
645 TmpInst.addOperand(MCOperand::CreateReg(Mips::GP));
646 const MCSymbolRefExpr *HiSym = MCSymbolRefExpr::Create(
647 "_gp_disp", MCSymbolRefExpr::VK_Mips_ABS_HI, MCA.getContext());
648 TmpInst.addOperand(MCOperand::CreateExpr(HiSym));
649 getStreamer().EmitInstruction(TmpInst, STI);
653 TmpInst.setOpcode(Mips::ADDiu);
654 TmpInst.addOperand(MCOperand::CreateReg(Mips::GP));
655 TmpInst.addOperand(MCOperand::CreateReg(Mips::GP));
656 const MCSymbolRefExpr *LoSym = MCSymbolRefExpr::Create(
657 "_gp_disp", MCSymbolRefExpr::VK_Mips_ABS_LO, MCA.getContext());
658 TmpInst.addOperand(MCOperand::CreateExpr(LoSym));
659 getStreamer().EmitInstruction(TmpInst, STI);
663 TmpInst.setOpcode(Mips::ADDu);
664 TmpInst.addOperand(MCOperand::CreateReg(Mips::GP));
665 TmpInst.addOperand(MCOperand::CreateReg(Mips::GP));
666 TmpInst.addOperand(MCOperand::CreateReg(RegNo));
667 getStreamer().EmitInstruction(TmpInst, STI);
669 forbidModuleDirective();
672 void MipsTargetELFStreamer::emitDirectiveCpsetup(unsigned RegNo,
676 // Only N32 and N64 emit anything for .cpsetup iff PIC is set.
677 if (!Pic || !(getABI().IsN32() || getABI().IsN64()))
680 MCAssembler &MCA = getStreamer().getAssembler();
683 // Either store the old $gp in a register or on the stack
685 // move $save, $gpreg
686 Inst.setOpcode(Mips::DADDu);
687 Inst.addOperand(MCOperand::CreateReg(RegOrOffset));
688 Inst.addOperand(MCOperand::CreateReg(Mips::GP));
689 Inst.addOperand(MCOperand::CreateReg(Mips::ZERO));
691 // sd $gpreg, offset($sp)
692 Inst.setOpcode(Mips::SD);
693 Inst.addOperand(MCOperand::CreateReg(Mips::GP));
694 Inst.addOperand(MCOperand::CreateReg(Mips::SP));
695 Inst.addOperand(MCOperand::CreateImm(RegOrOffset));
697 getStreamer().EmitInstruction(Inst, STI);
700 const MCSymbolRefExpr *HiExpr = MCSymbolRefExpr::Create(
701 Sym.getName(), MCSymbolRefExpr::VK_Mips_GPOFF_HI, MCA.getContext());
702 const MCSymbolRefExpr *LoExpr = MCSymbolRefExpr::Create(
703 Sym.getName(), MCSymbolRefExpr::VK_Mips_GPOFF_LO, MCA.getContext());
704 // lui $gp, %hi(%neg(%gp_rel(funcSym)))
705 Inst.setOpcode(Mips::LUi);
706 Inst.addOperand(MCOperand::CreateReg(Mips::GP));
707 Inst.addOperand(MCOperand::CreateExpr(HiExpr));
708 getStreamer().EmitInstruction(Inst, STI);
711 // addiu $gp, $gp, %lo(%neg(%gp_rel(funcSym)))
712 Inst.setOpcode(Mips::ADDiu);
713 Inst.addOperand(MCOperand::CreateReg(Mips::GP));
714 Inst.addOperand(MCOperand::CreateReg(Mips::GP));
715 Inst.addOperand(MCOperand::CreateExpr(LoExpr));
716 getStreamer().EmitInstruction(Inst, STI);
719 // daddu $gp, $gp, $funcreg
720 Inst.setOpcode(Mips::DADDu);
721 Inst.addOperand(MCOperand::CreateReg(Mips::GP));
722 Inst.addOperand(MCOperand::CreateReg(Mips::GP));
723 Inst.addOperand(MCOperand::CreateReg(RegNo));
724 getStreamer().EmitInstruction(Inst, STI);
726 forbidModuleDirective();
729 void MipsTargetELFStreamer::emitMipsAbiFlags() {
730 MCAssembler &MCA = getStreamer().getAssembler();
731 MCContext &Context = MCA.getContext();
732 MCStreamer &OS = getStreamer();
733 const MCSectionELF *Sec = Context.getELFSection(
734 ".MIPS.abiflags", ELF::SHT_MIPS_ABIFLAGS, ELF::SHF_ALLOC, 24, "");
735 MCSectionData &ABIShndxSD = MCA.getOrCreateSectionData(*Sec);
736 ABIShndxSD.setAlignment(8);
737 OS.SwitchSection(Sec);
739 OS << ABIFlagsSection;
742 void MipsTargetELFStreamer::emitDirectiveModuleOddSPReg(bool Enabled,
744 MipsTargetStreamer::emitDirectiveModuleOddSPReg(Enabled, IsO32ABI);
746 ABIFlagsSection.OddSPReg = Enabled;