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::emitDirectiveSetMips64R2() {
109 OS << "\t.set\tmips64r2\n";
112 void MipsTargetAsmStreamer::emitDirectiveSetDsp() {
113 OS << "\t.set\tdsp\n";
115 // Print a 32 bit hex number with all numbers.
116 static void printHex32(unsigned Value, raw_ostream &OS) {
118 for (int i = 7; i >= 0; i--)
119 OS.write_hex((Value & (0xF << (i*4))) >> (i*4));
122 void MipsTargetAsmStreamer::emitMask(unsigned CPUBitmask,
123 int CPUTopSavedRegOff) {
125 printHex32(CPUBitmask, OS);
126 OS << ',' << CPUTopSavedRegOff << '\n';
129 void MipsTargetAsmStreamer::emitFMask(unsigned FPUBitmask,
130 int FPUTopSavedRegOff) {
132 printHex32(FPUBitmask, OS);
133 OS << "," << FPUTopSavedRegOff << '\n';
136 // This part is for ELF object output.
137 MipsTargetELFStreamer::MipsTargetELFStreamer(MCStreamer &S,
138 const MCSubtargetInfo &STI)
139 : MipsTargetStreamer(S), MicroMipsEnabled(false), STI(STI) {
140 MCAssembler &MCA = getStreamer().getAssembler();
141 uint64_t Features = STI.getFeatureBits();
142 Triple T(STI.getTargetTriple());
143 Pic = (MCA.getContext().getObjectFileInfo()->getRelocM() == Reloc::PIC_)
147 // Update e_header flags
151 if (Features & Mips::FeatureMips64r2)
152 EFlags |= ELF::EF_MIPS_ARCH_64R2;
153 else if (Features & Mips::FeatureMips64)
154 EFlags |= ELF::EF_MIPS_ARCH_64;
155 else if (Features & Mips::FeatureMips32r2)
156 EFlags |= ELF::EF_MIPS_ARCH_32R2;
157 else if (Features & Mips::FeatureMips32)
158 EFlags |= ELF::EF_MIPS_ARCH_32;
160 if (T.isArch64Bit()) {
161 if (Features & Mips::FeatureN32)
162 EFlags |= ELF::EF_MIPS_ABI2;
163 else if (Features & Mips::FeatureO32) {
164 EFlags |= ELF::EF_MIPS_ABI_O32;
165 EFlags |= ELF::EF_MIPS_32BITMODE; /* Compatibility Mode */
167 // No need to set any bit for N64 which is the default ABI at the moment
168 // for 64-bit Mips architectures.
170 if (Features & Mips::FeatureMips64r2 || Features & Mips::FeatureMips64)
171 EFlags |= ELF::EF_MIPS_32BITMODE;
174 EFlags |= ELF::EF_MIPS_ABI_O32;
177 MCA.setELFHeaderEFlags(EFlags);
180 void MipsTargetELFStreamer::emitLabel(MCSymbol *Symbol) {
181 if (!isMicroMipsEnabled())
183 MCSymbolData &Data = getStreamer().getOrCreateSymbolData(Symbol);
184 uint8_t Type = MCELF::GetType(Data);
185 if (Type != ELF::STT_FUNC)
188 // The "other" values are stored in the last 6 bits of the second byte
189 // The traditional defines for STO values assume the full byte and thus
190 // the shift to pack it.
191 MCELF::setOther(Data, ELF::STO_MIPS_MICROMIPS >> 2);
194 void MipsTargetELFStreamer::finish() {
195 MCAssembler &MCA = getStreamer().getAssembler();
196 MCContext &Context = MCA.getContext();
197 MCStreamer &OS = getStreamer();
198 Triple T(STI.getTargetTriple());
199 uint64_t Features = STI.getFeatureBits();
201 if (T.isArch64Bit() && (Features & Mips::FeatureN64)) {
202 const MCSectionELF *Sec = Context.getELFSection(
203 ".MIPS.options", ELF::SHT_MIPS_OPTIONS,
204 ELF::SHF_ALLOC | ELF::SHF_MIPS_NOSTRIP, SectionKind::getMetadata());
205 OS.SwitchSection(Sec);
207 OS.EmitIntValue(1, 1); // kind
208 OS.EmitIntValue(40, 1); // size
209 OS.EmitIntValue(0, 2); // section
210 OS.EmitIntValue(0, 4); // info
211 OS.EmitIntValue(0, 4); // ri_gprmask
212 OS.EmitIntValue(0, 4); // pad
213 OS.EmitIntValue(0, 4); // ri_cpr[0]mask
214 OS.EmitIntValue(0, 4); // ri_cpr[1]mask
215 OS.EmitIntValue(0, 4); // ri_cpr[2]mask
216 OS.EmitIntValue(0, 4); // ri_cpr[3]mask
217 OS.EmitIntValue(0, 8); // ri_gp_value
219 const MCSectionELF *Sec =
220 Context.getELFSection(".reginfo", ELF::SHT_MIPS_REGINFO, ELF::SHF_ALLOC,
221 SectionKind::getMetadata());
222 OS.SwitchSection(Sec);
224 OS.EmitIntValue(0, 4); // ri_gprmask
225 OS.EmitIntValue(0, 4); // ri_cpr[0]mask
226 OS.EmitIntValue(0, 4); // ri_cpr[1]mask
227 OS.EmitIntValue(0, 4); // ri_cpr[2]mask
228 OS.EmitIntValue(0, 4); // ri_cpr[3]mask
229 OS.EmitIntValue(0, 4); // ri_gp_value
233 void MipsTargetELFStreamer::emitAssignment(MCSymbol *Symbol,
234 const MCExpr *Value) {
235 // If on rhs is micromips symbol then mark Symbol as microMips.
236 if (Value->getKind() != MCExpr::SymbolRef)
238 const MCSymbol &RhsSym =
239 static_cast<const MCSymbolRefExpr *>(Value)->getSymbol();
240 MCSymbolData &Data = getStreamer().getOrCreateSymbolData(&RhsSym);
241 uint8_t Type = MCELF::GetType(Data);
242 if ((Type != ELF::STT_FUNC)
243 || !(MCELF::getOther(Data) & (ELF::STO_MIPS_MICROMIPS >> 2)))
246 MCSymbolData &SymbolData = getStreamer().getOrCreateSymbolData(Symbol);
247 // The "other" values are stored in the last 6 bits of the second byte.
248 // The traditional defines for STO values assume the full byte and thus
249 // the shift to pack it.
250 MCELF::setOther(SymbolData, ELF::STO_MIPS_MICROMIPS >> 2);
253 MCELFStreamer &MipsTargetELFStreamer::getStreamer() {
254 return static_cast<MCELFStreamer &>(Streamer);
257 void MipsTargetELFStreamer::emitDirectiveSetMicroMips() {
258 MicroMipsEnabled = true;
260 MCAssembler &MCA = getStreamer().getAssembler();
261 unsigned Flags = MCA.getELFHeaderEFlags();
262 Flags |= ELF::EF_MIPS_MICROMIPS;
263 MCA.setELFHeaderEFlags(Flags);
266 void MipsTargetELFStreamer::emitDirectiveSetNoMicroMips() {
267 MicroMipsEnabled = false;
270 void MipsTargetELFStreamer::emitDirectiveSetMips16() {
271 MCAssembler &MCA = getStreamer().getAssembler();
272 unsigned Flags = MCA.getELFHeaderEFlags();
273 Flags |= ELF::EF_MIPS_ARCH_ASE_M16;
274 MCA.setELFHeaderEFlags(Flags);
277 void MipsTargetELFStreamer::emitDirectiveSetNoMips16() {
281 void MipsTargetELFStreamer::emitDirectiveSetReorder() {
285 void MipsTargetELFStreamer::emitDirectiveSetNoReorder() {
286 MCAssembler &MCA = getStreamer().getAssembler();
287 unsigned Flags = MCA.getELFHeaderEFlags();
288 Flags |= ELF::EF_MIPS_NOREORDER;
289 MCA.setELFHeaderEFlags(Flags);
292 void MipsTargetELFStreamer::emitDirectiveSetMacro() {
296 void MipsTargetELFStreamer::emitDirectiveSetNoMacro() {
300 void MipsTargetELFStreamer::emitDirectiveSetAt() {
304 void MipsTargetELFStreamer::emitDirectiveSetNoAt() {
308 void MipsTargetELFStreamer::emitDirectiveEnd(StringRef Name) {
312 void MipsTargetELFStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {
316 void MipsTargetELFStreamer::emitDirectiveAbiCalls() {
317 MCAssembler &MCA = getStreamer().getAssembler();
318 unsigned Flags = MCA.getELFHeaderEFlags();
319 Flags |= ELF::EF_MIPS_CPIC | ELF::EF_MIPS_PIC;
320 MCA.setELFHeaderEFlags(Flags);
322 void MipsTargetELFStreamer::emitDirectiveOptionPic0() {
323 MCAssembler &MCA = getStreamer().getAssembler();
324 unsigned Flags = MCA.getELFHeaderEFlags();
325 // This option overrides other PIC options like -KPIC.
327 Flags &= ~ELF::EF_MIPS_PIC;
328 MCA.setELFHeaderEFlags(Flags);
331 void MipsTargetELFStreamer::emitDirectiveOptionPic2() {
332 MCAssembler &MCA = getStreamer().getAssembler();
333 unsigned Flags = MCA.getELFHeaderEFlags();
335 // NOTE: We are following the GAS behaviour here which means the directive
336 // 'pic2' also sets the CPIC bit in the ELF header. This is different from
337 // what is stated in the SYSV ABI which consider the bits EF_MIPS_PIC and
338 // EF_MIPS_CPIC to be mutually exclusive.
339 Flags |= ELF::EF_MIPS_PIC | ELF::EF_MIPS_CPIC;
340 MCA.setELFHeaderEFlags(Flags);
343 void MipsTargetELFStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
344 unsigned ReturnReg) {
348 void MipsTargetELFStreamer::emitMask(unsigned CPUBitmask,
349 int CPUTopSavedRegOff) {
353 void MipsTargetELFStreamer::emitFMask(unsigned FPUBitmask,
354 int FPUTopSavedRegOff) {
358 void MipsTargetELFStreamer::emitDirectiveSetMips32R2() {
359 // No action required for ELF output.
362 void MipsTargetELFStreamer::emitDirectiveSetMips64R2() {
363 // No action required for ELF output.
366 void MipsTargetELFStreamer::emitDirectiveSetDsp() {
367 // No action required for ELF output.