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::FeatureMips32r2)
160 EFlags |= ELF::EF_MIPS_ARCH_32R2;
161 else if (Features & Mips::FeatureMips32)
162 EFlags |= ELF::EF_MIPS_ARCH_32;
164 if (T.isArch64Bit()) {
165 if (Features & Mips::FeatureN32)
166 EFlags |= ELF::EF_MIPS_ABI2;
167 else if (Features & Mips::FeatureO32) {
168 EFlags |= ELF::EF_MIPS_ABI_O32;
169 EFlags |= ELF::EF_MIPS_32BITMODE; /* Compatibility Mode */
171 // No need to set any bit for N64 which is the default ABI at the moment
172 // for 64-bit Mips architectures.
174 if (Features & Mips::FeatureMips64r2 || Features & Mips::FeatureMips64)
175 EFlags |= ELF::EF_MIPS_32BITMODE;
178 EFlags |= ELF::EF_MIPS_ABI_O32;
181 MCA.setELFHeaderEFlags(EFlags);
184 void MipsTargetELFStreamer::emitLabel(MCSymbol *Symbol) {
185 if (!isMicroMipsEnabled())
187 MCSymbolData &Data = getStreamer().getOrCreateSymbolData(Symbol);
188 uint8_t Type = MCELF::GetType(Data);
189 if (Type != ELF::STT_FUNC)
192 // The "other" values are stored in the last 6 bits of the second byte
193 // The traditional defines for STO values assume the full byte and thus
194 // the shift to pack it.
195 MCELF::setOther(Data, ELF::STO_MIPS_MICROMIPS >> 2);
198 void MipsTargetELFStreamer::finish() {
199 MCAssembler &MCA = getStreamer().getAssembler();
200 MCContext &Context = MCA.getContext();
201 MCStreamer &OS = getStreamer();
202 Triple T(STI.getTargetTriple());
203 uint64_t Features = STI.getFeatureBits();
205 if (T.isArch64Bit() && (Features & Mips::FeatureN64)) {
206 const MCSectionELF *Sec = Context.getELFSection(
207 ".MIPS.options", ELF::SHT_MIPS_OPTIONS,
208 ELF::SHF_ALLOC | ELF::SHF_MIPS_NOSTRIP, SectionKind::getMetadata());
209 OS.SwitchSection(Sec);
211 OS.EmitIntValue(1, 1); // kind
212 OS.EmitIntValue(40, 1); // size
213 OS.EmitIntValue(0, 2); // section
214 OS.EmitIntValue(0, 4); // info
215 OS.EmitIntValue(0, 4); // ri_gprmask
216 OS.EmitIntValue(0, 4); // pad
217 OS.EmitIntValue(0, 4); // ri_cpr[0]mask
218 OS.EmitIntValue(0, 4); // ri_cpr[1]mask
219 OS.EmitIntValue(0, 4); // ri_cpr[2]mask
220 OS.EmitIntValue(0, 4); // ri_cpr[3]mask
221 OS.EmitIntValue(0, 8); // ri_gp_value
223 const MCSectionELF *Sec =
224 Context.getELFSection(".reginfo", ELF::SHT_MIPS_REGINFO, ELF::SHF_ALLOC,
225 SectionKind::getMetadata());
226 OS.SwitchSection(Sec);
228 OS.EmitIntValue(0, 4); // ri_gprmask
229 OS.EmitIntValue(0, 4); // ri_cpr[0]mask
230 OS.EmitIntValue(0, 4); // ri_cpr[1]mask
231 OS.EmitIntValue(0, 4); // ri_cpr[2]mask
232 OS.EmitIntValue(0, 4); // ri_cpr[3]mask
233 OS.EmitIntValue(0, 4); // ri_gp_value
237 void MipsTargetELFStreamer::emitAssignment(MCSymbol *Symbol,
238 const MCExpr *Value) {
239 // If on rhs is micromips symbol then mark Symbol as microMips.
240 if (Value->getKind() != MCExpr::SymbolRef)
242 const MCSymbol &RhsSym =
243 static_cast<const MCSymbolRefExpr *>(Value)->getSymbol();
244 MCSymbolData &Data = getStreamer().getOrCreateSymbolData(&RhsSym);
245 uint8_t Type = MCELF::GetType(Data);
246 if ((Type != ELF::STT_FUNC)
247 || !(MCELF::getOther(Data) & (ELF::STO_MIPS_MICROMIPS >> 2)))
250 MCSymbolData &SymbolData = getStreamer().getOrCreateSymbolData(Symbol);
251 // The "other" values are stored in the last 6 bits of the second byte.
252 // The traditional defines for STO values assume the full byte and thus
253 // the shift to pack it.
254 MCELF::setOther(SymbolData, ELF::STO_MIPS_MICROMIPS >> 2);
257 MCELFStreamer &MipsTargetELFStreamer::getStreamer() {
258 return static_cast<MCELFStreamer &>(Streamer);
261 void MipsTargetELFStreamer::emitDirectiveSetMicroMips() {
262 MicroMipsEnabled = true;
264 MCAssembler &MCA = getStreamer().getAssembler();
265 unsigned Flags = MCA.getELFHeaderEFlags();
266 Flags |= ELF::EF_MIPS_MICROMIPS;
267 MCA.setELFHeaderEFlags(Flags);
270 void MipsTargetELFStreamer::emitDirectiveSetNoMicroMips() {
271 MicroMipsEnabled = false;
274 void MipsTargetELFStreamer::emitDirectiveSetMips16() {
275 MCAssembler &MCA = getStreamer().getAssembler();
276 unsigned Flags = MCA.getELFHeaderEFlags();
277 Flags |= ELF::EF_MIPS_ARCH_ASE_M16;
278 MCA.setELFHeaderEFlags(Flags);
281 void MipsTargetELFStreamer::emitDirectiveSetNoMips16() {
285 void MipsTargetELFStreamer::emitDirectiveSetReorder() {
289 void MipsTargetELFStreamer::emitDirectiveSetNoReorder() {
290 MCAssembler &MCA = getStreamer().getAssembler();
291 unsigned Flags = MCA.getELFHeaderEFlags();
292 Flags |= ELF::EF_MIPS_NOREORDER;
293 MCA.setELFHeaderEFlags(Flags);
296 void MipsTargetELFStreamer::emitDirectiveSetMacro() {
300 void MipsTargetELFStreamer::emitDirectiveSetNoMacro() {
304 void MipsTargetELFStreamer::emitDirectiveSetAt() {
308 void MipsTargetELFStreamer::emitDirectiveSetNoAt() {
312 void MipsTargetELFStreamer::emitDirectiveEnd(StringRef Name) {
316 void MipsTargetELFStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {
320 void MipsTargetELFStreamer::emitDirectiveAbiCalls() {
321 MCAssembler &MCA = getStreamer().getAssembler();
322 unsigned Flags = MCA.getELFHeaderEFlags();
323 Flags |= ELF::EF_MIPS_CPIC | ELF::EF_MIPS_PIC;
324 MCA.setELFHeaderEFlags(Flags);
326 void MipsTargetELFStreamer::emitDirectiveOptionPic0() {
327 MCAssembler &MCA = getStreamer().getAssembler();
328 unsigned Flags = MCA.getELFHeaderEFlags();
329 // This option overrides other PIC options like -KPIC.
331 Flags &= ~ELF::EF_MIPS_PIC;
332 MCA.setELFHeaderEFlags(Flags);
335 void MipsTargetELFStreamer::emitDirectiveOptionPic2() {
336 MCAssembler &MCA = getStreamer().getAssembler();
337 unsigned Flags = MCA.getELFHeaderEFlags();
339 // NOTE: We are following the GAS behaviour here which means the directive
340 // 'pic2' also sets the CPIC bit in the ELF header. This is different from
341 // what is stated in the SYSV ABI which consider the bits EF_MIPS_PIC and
342 // EF_MIPS_CPIC to be mutually exclusive.
343 Flags |= ELF::EF_MIPS_PIC | ELF::EF_MIPS_CPIC;
344 MCA.setELFHeaderEFlags(Flags);
347 void MipsTargetELFStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
348 unsigned ReturnReg) {
352 void MipsTargetELFStreamer::emitMask(unsigned CPUBitmask,
353 int CPUTopSavedRegOff) {
357 void MipsTargetELFStreamer::emitFMask(unsigned FPUBitmask,
358 int FPUTopSavedRegOff) {
362 void MipsTargetELFStreamer::emitDirectiveSetMips32R2() {
363 // No action required for ELF output.
366 void MipsTargetELFStreamer::emitDirectiveSetMips64() {
367 // No action required for ELF output.
370 void MipsTargetELFStreamer::emitDirectiveSetMips64R2() {
371 // No action required for ELF output.
374 void MipsTargetELFStreamer::emitDirectiveSetDsp() {
375 // No action required for ELF output.