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 "MipsMCTargetDesc.h"
16 #include "MipsTargetObjectFile.h"
17 #include "MipsTargetStreamer.h"
18 #include "llvm/MC/MCContext.h"
19 #include "llvm/MC/MCELF.h"
20 #include "llvm/MC/MCSectionELF.h"
21 #include "llvm/MC/MCSubtargetInfo.h"
22 #include "llvm/MC/MCSymbol.h"
23 #include "llvm/Support/CommandLine.h"
24 #include "llvm/Support/ELF.h"
25 #include "llvm/Support/ErrorHandling.h"
26 #include "llvm/Support/FormattedStream.h"
30 // Pin vtable to this file.
31 void MipsTargetStreamer::anchor() {}
33 MipsTargetStreamer::MipsTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {}
35 MipsTargetAsmStreamer::MipsTargetAsmStreamer(MCStreamer &S,
36 formatted_raw_ostream &OS)
37 : MipsTargetStreamer(S), OS(OS) {}
39 void MipsTargetAsmStreamer::emitDirectiveSetMicroMips() {
40 OS << "\t.set\tmicromips\n";
43 void MipsTargetAsmStreamer::emitDirectiveSetNoMicroMips() {
44 OS << "\t.set\tnomicromips\n";
47 void MipsTargetAsmStreamer::emitDirectiveSetMips16() {
48 OS << "\t.set\tmips16\n";
51 void MipsTargetAsmStreamer::emitDirectiveSetNoMips16() {
52 OS << "\t.set\tnomips16\n";
55 void MipsTargetAsmStreamer::emitDirectiveSetReorder() {
56 OS << "\t.set\treorder\n";
59 void MipsTargetAsmStreamer::emitDirectiveSetNoReorder() {
60 OS << "\t.set\tnoreorder\n";
63 void MipsTargetAsmStreamer::emitDirectiveSetMacro() {
64 OS << "\t.set\tmacro\n";
67 void MipsTargetAsmStreamer::emitDirectiveSetNoMacro() {
68 OS << "\t.set\tnomacro\n";
71 void MipsTargetAsmStreamer::emitDirectiveSetAt() {
75 void MipsTargetAsmStreamer::emitDirectiveSetNoAt() {
76 OS << "\t.set\tnoat\n";
79 void MipsTargetAsmStreamer::emitDirectiveEnd(StringRef Name) {
80 OS << "\t.end\t" << Name << '\n';
83 void MipsTargetAsmStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {
84 OS << "\t.ent\t" << Symbol.getName() << '\n';
87 void MipsTargetAsmStreamer::emitDirectiveAbiCalls() { OS << "\t.abicalls\n"; }
88 void MipsTargetAsmStreamer::emitDirectiveOptionPic0() {
89 OS << "\t.option\tpic0\n";
92 void MipsTargetAsmStreamer::emitDirectiveOptionPic2() {
93 OS << "\t.option\tpic2\n";
96 void MipsTargetAsmStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
99 << StringRef(MipsInstPrinter::getRegisterName(StackReg)).lower() << ","
101 << StringRef(MipsInstPrinter::getRegisterName(ReturnReg)).lower() << '\n';
104 void MipsTargetAsmStreamer::emitDirectiveSetMips32R2() {
105 OS << "\t.set\tmips32r2\n";
108 void MipsTargetAsmStreamer::emitDirectiveSetMips64() {
109 OS << "\t.set\tmips64\n";
112 void MipsTargetAsmStreamer::emitDirectiveSetMips64R2() {
113 OS << "\t.set\tmips64r2\n";
116 void MipsTargetAsmStreamer::emitDirectiveSetDsp() {
117 OS << "\t.set\tdsp\n";
119 // Print a 32 bit hex number with all numbers.
120 static void printHex32(unsigned Value, raw_ostream &OS) {
122 for (int i = 7; i >= 0; i--)
123 OS.write_hex((Value & (0xF << (i*4))) >> (i*4));
126 void MipsTargetAsmStreamer::emitMask(unsigned CPUBitmask,
127 int CPUTopSavedRegOff) {
129 printHex32(CPUBitmask, OS);
130 OS << ',' << CPUTopSavedRegOff << '\n';
133 void MipsTargetAsmStreamer::emitFMask(unsigned FPUBitmask,
134 int FPUTopSavedRegOff) {
136 printHex32(FPUBitmask, OS);
137 OS << "," << FPUTopSavedRegOff << '\n';
140 // This part is for ELF object output.
141 MipsTargetELFStreamer::MipsTargetELFStreamer(MCStreamer &S,
142 const MCSubtargetInfo &STI)
143 : MipsTargetStreamer(S), MicroMipsEnabled(false), STI(STI) {
144 MCAssembler &MCA = getStreamer().getAssembler();
145 uint64_t Features = STI.getFeatureBits();
146 Triple T(STI.getTargetTriple());
147 Pic = (MCA.getContext().getObjectFileInfo()->getRelocM() == Reloc::PIC_)
151 // Update e_header flags
155 if (Features & Mips::FeatureMips64r2)
156 EFlags |= ELF::EF_MIPS_ARCH_64R2;
157 else if (Features & Mips::FeatureMips64)
158 EFlags |= ELF::EF_MIPS_ARCH_64;
159 else if (Features & Mips::FeatureMips4)
160 EFlags |= ELF::EF_MIPS_ARCH_4;
161 else if (Features & Mips::FeatureMips32r2)
162 EFlags |= ELF::EF_MIPS_ARCH_32R2;
163 else if (Features & Mips::FeatureMips32)
164 EFlags |= ELF::EF_MIPS_ARCH_32;
166 if (T.isArch64Bit()) {
167 if (Features & Mips::FeatureN32)
168 EFlags |= ELF::EF_MIPS_ABI2;
169 else if (Features & Mips::FeatureO32) {
170 EFlags |= ELF::EF_MIPS_ABI_O32;
171 EFlags |= ELF::EF_MIPS_32BITMODE; /* Compatibility Mode */
173 // No need to set any bit for N64 which is the default ABI at the moment
174 // for 64-bit Mips architectures.
176 if (Features & Mips::FeatureMips64r2 || Features & Mips::FeatureMips64)
177 EFlags |= ELF::EF_MIPS_32BITMODE;
180 EFlags |= ELF::EF_MIPS_ABI_O32;
183 MCA.setELFHeaderEFlags(EFlags);
186 void MipsTargetELFStreamer::emitLabel(MCSymbol *Symbol) {
187 if (!isMicroMipsEnabled())
189 MCSymbolData &Data = getStreamer().getOrCreateSymbolData(Symbol);
190 uint8_t Type = MCELF::GetType(Data);
191 if (Type != ELF::STT_FUNC)
194 // The "other" values are stored in the last 6 bits of the second byte
195 // The traditional defines for STO values assume the full byte and thus
196 // the shift to pack it.
197 MCELF::setOther(Data, ELF::STO_MIPS_MICROMIPS >> 2);
200 void MipsTargetELFStreamer::finish() {
201 MCAssembler &MCA = getStreamer().getAssembler();
202 MCContext &Context = MCA.getContext();
203 MCStreamer &OS = getStreamer();
204 Triple T(STI.getTargetTriple());
205 uint64_t Features = STI.getFeatureBits();
207 if (T.isArch64Bit() && (Features & Mips::FeatureN64)) {
208 const MCSectionELF *Sec = Context.getELFSection(
209 ".MIPS.options", ELF::SHT_MIPS_OPTIONS,
210 ELF::SHF_ALLOC | ELF::SHF_MIPS_NOSTRIP, SectionKind::getMetadata());
211 OS.SwitchSection(Sec);
213 OS.EmitIntValue(1, 1); // kind
214 OS.EmitIntValue(40, 1); // size
215 OS.EmitIntValue(0, 2); // section
216 OS.EmitIntValue(0, 4); // info
217 OS.EmitIntValue(0, 4); // ri_gprmask
218 OS.EmitIntValue(0, 4); // pad
219 OS.EmitIntValue(0, 4); // ri_cpr[0]mask
220 OS.EmitIntValue(0, 4); // ri_cpr[1]mask
221 OS.EmitIntValue(0, 4); // ri_cpr[2]mask
222 OS.EmitIntValue(0, 4); // ri_cpr[3]mask
223 OS.EmitIntValue(0, 8); // ri_gp_value
225 const MCSectionELF *Sec =
226 Context.getELFSection(".reginfo", ELF::SHT_MIPS_REGINFO, ELF::SHF_ALLOC,
227 SectionKind::getMetadata());
228 OS.SwitchSection(Sec);
230 OS.EmitIntValue(0, 4); // ri_gprmask
231 OS.EmitIntValue(0, 4); // ri_cpr[0]mask
232 OS.EmitIntValue(0, 4); // ri_cpr[1]mask
233 OS.EmitIntValue(0, 4); // ri_cpr[2]mask
234 OS.EmitIntValue(0, 4); // ri_cpr[3]mask
235 OS.EmitIntValue(0, 4); // ri_gp_value
239 void MipsTargetELFStreamer::emitAssignment(MCSymbol *Symbol,
240 const MCExpr *Value) {
241 // If on rhs is micromips symbol then mark Symbol as microMips.
242 if (Value->getKind() != MCExpr::SymbolRef)
244 const MCSymbol &RhsSym =
245 static_cast<const MCSymbolRefExpr *>(Value)->getSymbol();
246 MCSymbolData &Data = getStreamer().getOrCreateSymbolData(&RhsSym);
247 uint8_t Type = MCELF::GetType(Data);
248 if ((Type != ELF::STT_FUNC)
249 || !(MCELF::getOther(Data) & (ELF::STO_MIPS_MICROMIPS >> 2)))
252 MCSymbolData &SymbolData = getStreamer().getOrCreateSymbolData(Symbol);
253 // The "other" values are stored in the last 6 bits of the second byte.
254 // The traditional defines for STO values assume the full byte and thus
255 // the shift to pack it.
256 MCELF::setOther(SymbolData, ELF::STO_MIPS_MICROMIPS >> 2);
259 MCELFStreamer &MipsTargetELFStreamer::getStreamer() {
260 return static_cast<MCELFStreamer &>(Streamer);
263 void MipsTargetELFStreamer::emitDirectiveSetMicroMips() {
264 MicroMipsEnabled = true;
266 MCAssembler &MCA = getStreamer().getAssembler();
267 unsigned Flags = MCA.getELFHeaderEFlags();
268 Flags |= ELF::EF_MIPS_MICROMIPS;
269 MCA.setELFHeaderEFlags(Flags);
272 void MipsTargetELFStreamer::emitDirectiveSetNoMicroMips() {
273 MicroMipsEnabled = false;
276 void MipsTargetELFStreamer::emitDirectiveSetMips16() {
277 MCAssembler &MCA = getStreamer().getAssembler();
278 unsigned Flags = MCA.getELFHeaderEFlags();
279 Flags |= ELF::EF_MIPS_ARCH_ASE_M16;
280 MCA.setELFHeaderEFlags(Flags);
283 void MipsTargetELFStreamer::emitDirectiveSetNoMips16() {
287 void MipsTargetELFStreamer::emitDirectiveSetReorder() {
291 void MipsTargetELFStreamer::emitDirectiveSetNoReorder() {
292 MCAssembler &MCA = getStreamer().getAssembler();
293 unsigned Flags = MCA.getELFHeaderEFlags();
294 Flags |= ELF::EF_MIPS_NOREORDER;
295 MCA.setELFHeaderEFlags(Flags);
298 void MipsTargetELFStreamer::emitDirectiveSetMacro() {
302 void MipsTargetELFStreamer::emitDirectiveSetNoMacro() {
306 void MipsTargetELFStreamer::emitDirectiveSetAt() {
310 void MipsTargetELFStreamer::emitDirectiveSetNoAt() {
314 void MipsTargetELFStreamer::emitDirectiveEnd(StringRef Name) {
318 void MipsTargetELFStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {
322 void MipsTargetELFStreamer::emitDirectiveAbiCalls() {
323 MCAssembler &MCA = getStreamer().getAssembler();
324 unsigned Flags = MCA.getELFHeaderEFlags();
325 Flags |= ELF::EF_MIPS_CPIC | ELF::EF_MIPS_PIC;
326 MCA.setELFHeaderEFlags(Flags);
328 void MipsTargetELFStreamer::emitDirectiveOptionPic0() {
329 MCAssembler &MCA = getStreamer().getAssembler();
330 unsigned Flags = MCA.getELFHeaderEFlags();
331 // This option overrides other PIC options like -KPIC.
333 Flags &= ~ELF::EF_MIPS_PIC;
334 MCA.setELFHeaderEFlags(Flags);
337 void MipsTargetELFStreamer::emitDirectiveOptionPic2() {
338 MCAssembler &MCA = getStreamer().getAssembler();
339 unsigned Flags = MCA.getELFHeaderEFlags();
341 // NOTE: We are following the GAS behaviour here which means the directive
342 // 'pic2' also sets the CPIC bit in the ELF header. This is different from
343 // what is stated in the SYSV ABI which consider the bits EF_MIPS_PIC and
344 // EF_MIPS_CPIC to be mutually exclusive.
345 Flags |= ELF::EF_MIPS_PIC | ELF::EF_MIPS_CPIC;
346 MCA.setELFHeaderEFlags(Flags);
349 void MipsTargetELFStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
350 unsigned ReturnReg) {
354 void MipsTargetELFStreamer::emitMask(unsigned CPUBitmask,
355 int CPUTopSavedRegOff) {
359 void MipsTargetELFStreamer::emitFMask(unsigned FPUBitmask,
360 int FPUTopSavedRegOff) {
364 void MipsTargetELFStreamer::emitDirectiveSetMips32R2() {
365 // No action required for ELF output.
368 void MipsTargetELFStreamer::emitDirectiveSetMips64() {
369 // No action required for ELF output.
372 void MipsTargetELFStreamer::emitDirectiveSetMips64R2() {
373 // No action required for ELF output.
376 void MipsTargetELFStreamer::emitDirectiveSetDsp() {
377 // No action required for ELF output.